Пример #1
0
 def _transform_path(self, subslice=None):
     # Masked arrays are now handled by the Path class itself
     if subslice is not None:
         _path = Path(self._xy[subslice, :])
     else:
         _path = self._path
     self._transformed_path = TransformedPath(_path, self.get_transform())
Пример #2
0
    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          * a :class:`~matplotlib.patches.Patch` (or subclass) instance

          * a :class:`~matplotlib.path.Path` instance, in which case
             an optional :class:`~matplotlib.transforms.Transform`
             instance may be provided, which will be applied to the
             path before using it for clipping.

          * *None*, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to *None*.

        ACCEPTS: [ (:class:`~matplotlib.path.Path`,
        :class:`~matplotlib.transforms.Transform`) |
        :class:`~matplotlib.patches.Patch` | None ]
        """
        from matplotlib.patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(),
                                              path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(
                    path.get_path(),
                    path.get_transform())
                success = True
            elif isinstance(path, tuple):
                path, transform = path

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True
        elif isinstance(path, TransformedPath):
            self._clippath = path
            success = True

        if not success:
            print(type(path), type(transform))
            raise TypeError("Invalid arguments to set_clip_path")

        self.pchanged()
Пример #3
0
    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          * a :class:`~matplotlib.patches.Patch` (or subclass) instance

          * a :class:`~matplotlib.path.Path` instance, in which case
             an optional :class:`~matplotlib.transforms.Transform`
             instance may be provided, which will be applied to the
             path before using it for clipping.

          * *None*, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to *None*.

        ACCEPTS: [ (:class:`~matplotlib.path.Path`,
        :class:`~matplotlib.transforms.Transform`) |
        :class:`~matplotlib.patches.Patch` | None ]
        """
        from matplotlib.patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(),
                                              path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(
                    path.get_path(),
                    path.get_transform())
                success = True
            elif isinstance(path, tuple):
                path, transform = path

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True
        elif isinstance(path, TransformedPath):
            self._clippath = path
            success = True

        if not success:
            print(type(path), type(transform))
            raise TypeError("Invalid arguments to set_clip_path")

        self.pchanged()
Пример #4
0
 def _transform_path(self, subslice=None):
     # Masked arrays are now handled by the Path class itself
     if subslice is not None:
         _path = Path(self._xy[subslice,:])
     else:
         _path = self._path
     self._transformed_path = TransformedPath(_path, self.get_transform())
Пример #5
0
    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          a) a Patch (or subclass) instance

          b) a Path instance, in which cas aoptional transform may
             be provided, which will be applied to the path before using it
             for clipping.

          c) None, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to None.
             
        ACCEPTS: a Path instance and a Transform instance, a Patch
        instance, or None
        """
        from patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(),
                                               path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(path.get_path(),
                                                 path.get_transform())
                success = True

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True

        if not success:
            print type(path), type(transform)
            raise TypeError("Invalid arguments to set_clip_path")

        self._clipon = self.clipbox is not None or self._clippath is not None
        self.pchanged()
Пример #6
0
    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          a) a Patch (or subclass) instance

          b) a Path instance, in which cas aoptional transform may
             be provided, which will be applied to the path before using it
             for clipping.

          c) None, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to None.

        ACCEPTS: a Path instance and a Transform instance, a Patch
        instance, or None
        """
        from patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(), path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(
                    path.get_path(),
                    path.get_transform())
                success = True

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True

        if not success:
            print type(path), type(transform)
            raise TypeError("Invalid arguments to set_clip_path")

        self._clipon = self.clipbox is not None or self._clippath is not None
        self.pchanged()
Пример #7
0
 def _transform_path(self, subslice=None):
     """
     Puts a TransformedPath instance at self._transformed_path,
     all invalidation of the transform is then handled by the
     TransformedPath instance.
     """
     # Masked arrays are now handled by the Path class itself
     if subslice is not None:
         _path = Path(self._xy[subslice, :])
     else:
         _path = self._path
     self._transformed_path = TransformedPath(_path, self.get_transform())
Пример #8
0
    def recache(self):
        #if self.axes is None: print 'recache no axes'
        #else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x) == 1 and len(y) > 1:
            x = x * np.ones(y.shape, float)
        if len(y) == 1 and len(x) > 1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0]  # just a view
        self._y = self._xy[:, 1]  # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path,
                                                 self.get_transform())

        self._invalid = False
Пример #9
0
    def recache(self):
        #if self.axes is None: print 'recache no axes'
        #else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x)==1 and len(y)>1:
            x = x * np.ones(y.shape, float)
        if len(y)==1 and len(x)>1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0] # just a view
        self._y = self._xy[:, 1] # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path, self.get_transform())

        self._invalid = False
Пример #10
0
class Line2D(Artist):
    lineStyles = _lineStyles =  { # hidden names deprecated
        '-'          : '_draw_solid',
        '--'         : '_draw_dashed',
        '-.'         : '_draw_dash_dot',
        ':'          : '_draw_dotted',
        'steps'      : '_draw_steps_pre',
        'steps-mid'  : '_draw_steps_mid',
        'steps-pre'  : '_draw_steps_pre',
        'steps-post' : '_draw_steps_post',
        'None'       : '_draw_nothing',
        ' '          : '_draw_nothing',
        ''           : '_draw_nothing',
    }

    markers = _markers =  {  # hidden names deprecated
        '.'  : '_draw_point',
        ','  : '_draw_pixel',
        'o'  : '_draw_circle',
        'v'  : '_draw_triangle_down',
        '^'  : '_draw_triangle_up',
        '<'  : '_draw_triangle_left',
        '>'  : '_draw_triangle_right',
        '1'  : '_draw_tri_down',
        '2'  : '_draw_tri_up',
        '3'  : '_draw_tri_left',
        '4'  : '_draw_tri_right',
        's'  : '_draw_square',
        'p'  : '_draw_pentagon',
        'h'  : '_draw_hexagon1',
        'H'  : '_draw_hexagon2',
        '+'  : '_draw_plus',
        'x'  : '_draw_x',
        'D'  : '_draw_diamond',
        'd'  : '_draw_thin_diamond',
        '|'  : '_draw_vline',
        '_'  : '_draw_hline',
        TICKLEFT    : '_draw_tickleft',
        TICKRIGHT   : '_draw_tickright',
        TICKUP      : '_draw_tickup',
        TICKDOWN    : '_draw_tickdown',
        CARETLEFT   : '_draw_caretleft',
        CARETRIGHT  : '_draw_caretright',
        CARETUP     : '_draw_caretup',
        CARETDOWN   : '_draw_caretdown',
        'None' : '_draw_nothing',
        ' ' : '_draw_nothing',
        '' : '_draw_nothing',
    }

    filled_markers = ('o', '^', 'v', '<', '>', 's', 'd', 'D', 'h', 'H', 'p')

    zorder = 2
    validCap = ('butt', 'round', 'projecting')
    validJoin =   ('miter', 'round', 'bevel')

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)"%(self._label)
        elif hasattr(self, '_x') and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
                %(self._x[0],self._y[0],self._x[0],self._y[0],self._x[-1],self._y[-1])
        elif hasattr(self, '_x'):
            return "Line2D(%s)"\
                %(",".join(["(%g,%g)"%(x,y) for x,y in zip(self._x,self._y)]))
        else:
            return "Line2D()"

    def __init__(self, xdata, ydata,
                 linewidth       = None, # all Nones default to rc
                 linestyle       = None,
                 color           = None,
                 marker          = None,
                 markersize      = None,
                 markeredgewidth = None,
                 markeredgecolor = None,
                 markerfacecolor = None,
                 antialiased     = None,
                 dash_capstyle   = None,
                 solid_capstyle  = None,
                 dash_joinstyle  = None,
                 solid_joinstyle = None,
                 pickradius      = 5,
                 **kwargs
                 ):
        """
        Create a Line2D instance with x and y data in sequences xdata,
        ydata

        The kwargs are Line2D properties:
          alpha: float
          animated: [True | False]
          antialiased or aa: [True | False]
          clip_box: a matplotlib.transform.Bbox instance
          clip_on: [True | False]
          color or c: any matplotlib color
          dash_capstyle: ['butt' | 'round' | 'projecting']
          dash_joinstyle: ['miter' | 'round' | 'bevel']
          dashes: sequence of on/off ink in points
          data: (np.array xdata, np.array ydata)
          figure: a matplotlib.figure.Figure instance
          label: any string
          linestyle or ls: [ '-' | '--' | '-.' | ':' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' | 'None' | ' ' | '' ]
          linewidth or lw: float value in points
          lod: [True | False]
          marker: [ '+' | ',' | '.' | '1' | '2' | '3' | '4'
          markeredgecolor or mec: any matplotlib color
          markeredgewidth or mew: float value in points (default 5)
          markerfacecolor or mfc: any matplotlib color
          markersize or ms: float
          pickradius: mouse event radius for pick items in points (default 5)
          solid_capstyle: ['butt' | 'round' |  'projecting']
          solid_joinstyle: ['miter' | 'round' | 'bevel']
          transform: a matplotlib.transform transformation instance
          visible: [True | False]
          xdata: np.array
          ydata: np.array
          zorder: any number
        """
        Artist.__init__(self)

        #convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError('xdata must be a sequence')
        if not iterable(ydata):
            raise RuntimeError('ydata must be a sequence')

        if linewidth is None   : linewidth=rcParams['lines.linewidth']

        if linestyle is None   : linestyle=rcParams['lines.linestyle']
        if marker is None      : marker=rcParams['lines.marker']
        if color is None       : color=rcParams['lines.color']
        if markeredgecolor is None :
            markeredgecolor='auto'
        if markerfacecolor is None :
            markerfacecolor='auto'
        if markeredgewidth is None :
            markeredgewidth=rcParams['lines.markeredgewidth']

        if markersize is None  : markersize=rcParams['lines.markersize']
        if antialiased is None : antialiased=rcParams['lines.antialiased']
        if dash_capstyle is None : dash_capstyle=rcParams['lines.dash_capstyle']
        if dash_joinstyle is None : dash_joinstyle=rcParams['lines.dash_joinstyle']
        if solid_capstyle is None : solid_capstyle=rcParams['lines.solid_capstyle']
        if solid_joinstyle is None : solid_joinstyle=rcParams['lines.solid_joinstyle']

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)


        self.set_linestyle(linestyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self.set_marker(marker)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None


        self.set_markerfacecolor(markerfacecolor)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self._point_size_reduction = 0.5

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalid = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """Test whether the mouse event occurred on the line.  The pick radius determines
        the precision of the location test (usually within five points of the value).  Use
        get/set pickradius() to view or modify it.

        Returns True if any values are within the radius along with {'ind': pointlist},
        np.where pointlist is the set of points within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains): return self._contains(self,mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError,"pick radius should be a distance"

        # transform in backend
        if len(self._xy)==0: return False,{}

        xyt = self._transformed_path.get_fully_transformed_path().vertices
        xt = xyt[:, 0]
        yt = xyt[:, 1]

        if self.figure == None:
            print str(self),' has no figure set'
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi/72. * self.pickradius

        if self._linestyle == 'None':
            # If no line, return the nearby point(s)
            d = np.sqrt((xt-mouseevent.x)**2 + (yt-mouseevent.y)**2)
            ind, = np.nonzero(np.less_equal(d, pixels))
        else:
            # If line, return the nearby segment(s)
            ind = segment_hits(mouseevent.x,mouseevent.y,xt,yt,pixels)
        if 0:
            print 'xt', xt, mouseevent.x
            print 'yt', yt, mouseevent.y
            print 'd', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print d, pixels, ind
        return len(ind)>0,dict(ind=ind)

    def get_pickradius(self):
        'return the pick radius used for containment tests'
        return self.pickradius

    def set_pickradius(self,d):
        """Sets the pick radius used for containment tests

        Accepts: float distance in points.
        """
        self.pickradius = d

    def set_picker(self,p):
        """Sets the event picker details for the line.

        Accepts: float distance in points or callable pick function fn(artist,event)
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(self.get_xydata()),
                                 ignore=True)
        # correct for marker size, if any
        if self._marker is not None:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect('units', self.recache)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect('units', self.recache)

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: (np.array xdata, np.array ydata)
        """
        if len(args)==1:
            x, y = args[0]
        else:
            x, y = args

        not_masked = 0
        if not ma.isMaskedArray(x):
            x = np.asarray(x)
            not_masked += 1
        if not ma.isMaskedArray(y):
            y = np.asarray(y)
            not_masked += 1

        if (not_masked < 2 or
            (x is not self._xorig and
             (x.shape != self._xorig.shape or np.any(x != self._xorig))) or
            (y is not self._yorig and
              (y.shape != self._yorig.shape or np.any(y != self._yorig)))):
            self._xorig = x
            self._yorig = y
            self._invalid = True

    def recache(self):
        #if self.axes is None: print 'recache no axes'
        #else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x)==1 and len(y)>1:
            x = x * np.ones(y.shape, float)
        if len(y)==1 and len(x)>1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0] # just a view
        self._y = self._xy[:, 1] # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path, self.get_transform())

        self._invalid = False

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a matplotlib.transforms.Transform instance
        """
        Artist.set_transform(self, t)
        self._invalid = True
        # self._transformed_path = TransformedPath(self._path, self.get_transform())

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x)<2: return 1
        return np.alltrue(x[1:]-x[0:-1]>=0)

    def draw(self, renderer):
        if self._invalid:
            self.recache()

        renderer.open_group('line2d')

        if not self._visible: return
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)

        funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
        if funcname != '_draw_nothing':
            tpath, affine = self._transformed_path.get_transformed_path_and_affine()
            lineFunc = getattr(self, funcname)
            lineFunc(renderer, gc, tpath, affine.frozen())

        if self._marker is not None:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            gc.set_foreground(self.get_markeredgecolor())
            gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            funcname = self._markers.get(self._marker, '_draw_nothing')
            if funcname != '_draw_nothing':
                tpath, affine = self._transformed_path.get_transformed_path_and_affine()
                markerFunc = getattr(self, funcname)
                markerFunc(renderer, gc, tpath, affine.frozen())

        renderer.close_group('line2d')

    def get_antialiased(self): return self._antialiased
    def get_color(self): return self._color
    def get_linestyle(self): return self._linestyle

    def get_linewidth(self): return self._linewidth
    def get_marker(self): return self._marker

    def get_markeredgecolor(self):
        if (is_string_like(self._markeredgecolor) and
            self._markeredgecolor == 'auto'):
            if self._marker in self.filled_markers:
                return 'k'
            else:
                return self._color
        else:
            return self._markeredgecolor


        return self._markeredgecolor
    def get_markeredgewidth(self): return self._markeredgewidth

    def get_markerfacecolor(self):
        if (self._markerfacecolor is None or
            (is_string_like(self._markerfacecolor) and
             self._markerfacecolor.lower()=='none') ):
            return self._markerfacecolor
        elif (is_string_like(self._markerfacecolor) and
              self._markerfacecolor.lower() == 'auto'):
            return self._color
        else:
            return self._markerfacecolor


    def get_markersize(self): return self._markersize

    def get_data(self, orig=True):
        'return the xdata, ydata; if orig is True, return the original data'
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)


    def get_xdata(self, orig=True):
        """
        return the xdata; if orig is true return the original data,
        else the processed data
        """
        if orig:
            return self._xorig
        if self._invalid:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        return the ydata; if orig is true return the original data,
        else the processed data
        """
        if orig:
            return self._yorig
        if self._invalid:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the Path object associated with this line.
        """
        if self._invalid:
            self.recache()
        return self._path

    def get_xydata(self):
        if self._invalid:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        ACCEPTS: [ '-' | '--' | '-.' | ':' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' | 'None' | ' ' | '' ]
        """
        if linestyle not in self._lineStyles:
            if ls_mapper.has_key(linestyle):
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report('Unrecognized line style %s, %s' %
                                            (linestyle, type(linestyle)))
        if linestyle in [' ','']:
            linestyle = 'None'
        self._linestyle = linestyle
        self._lineFunc = self._lineStyles[linestyle]

    def set_marker(self, marker):
        """
        Set the line marker

        ACCEPTS: [ '+' | ',' | '.' | '1' | '2' | '3' | '4'
                 | '<' | '>' | 'D' | 'H' | '^' | '_' | 'd'
                 | 'h' | 'o' | 'p' | 's' | 'v' | 'x' | '|'
                 | TICKUP | TICKDOWN | TICKLEFT | TICKRIGHT
                 | 'None' | ' ' | '' ]

        """
        if marker not in self._markers:
            verbose.report('Unrecognized marker style %s, %s' %
                                            (marker, type(marker)))
        if marker in [' ','']:
            marker = 'None'
        self._marker = marker
        self._markerFunc = self._markers[marker]

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color

        ACCEPTS: any matplotlib color
        """
        self._markerfacecolor = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: np.array
        """
        x = np.asarray(x)
        self.set_data(x, self._yorig)

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: np.array
        """
        y = np.asarray(y)
        self.set_data(self._xorig, y)

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq)==0:
            self.set_linestyle('-')
        else:
            self.set_linestyle('--')
        self._dashSeq = seq  # TODO: offset ignored for now

    def _draw_nothing(self, *args, **kwargs):
        pass


    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle('solid')
        renderer.draw_path(gc, path, trans)


    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)


    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)


    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)


    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle('dashed')
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)


    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle('dashdot')
        renderer.draw_path(gc, path, trans)


    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle('dotted')
        renderer.draw_path(gc, path, trans)


    def _draw_point(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * \
            self._point_size_reduction * 0.5
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)

    _draw_pixel_transform = Affine2D().translate(-0.5, -0.5)
    def _draw_pixel(self, renderer, gc, path, path_trans):
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(),
                              self._draw_pixel_transform,
                              path, path_trans, rgbFace)


    def _draw_circle(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * 0.5
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w, w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)


    _triangle_path = Path([[0.0, 1.0], [-1.0, -1.0], [1.0, -1.0], [0.0, 1.0]])
    def _draw_triangle_up(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_down(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, -offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_left(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_right(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(-90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_square(self, renderer, gc, path, path_trans):
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_diamond(self, renderer, gc, path, path_trans):
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).rotate_deg(45).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_thin_diamond(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5) \
            .rotate_deg(45).scale(offset * 0.6, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_pentagon(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(5), transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon1(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon2(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(30)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    _line_marker_path = Path([[0.0, -1.0], [0.0, 1.0]])
    def _draw_vline(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    def _draw_hline(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    _tickhoriz_path = Path([[0.0, 0.0], [1.0, 0.0]])
    def _draw_tickleft(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(-offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    def _draw_tickright(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    _tickvert_path = Path([[-0.0, 0.0], [-0.0, 1.0]])
    def _draw_tickup(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    def _draw_tickdown(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, -offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    _plus_path = Path([[-1.0, 0.0], [1.0, 0.0],
                       [0.0, -1.0], [0.0, 1.0]],
                      [Path.MOVETO, Path.LINETO,
                       Path.MOVETO, Path.LINETO])
    def _draw_plus(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._plus_path, transform,
                              path, path_trans)


    _tri_path = Path([[0.0, 0.0], [0.0, -1.0],
                      [0.0, 0.0], [0.8, 0.5],
                      [0.0, 0.0], [-0.8, 0.5]],
                     [Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO])
    def _draw_tri_down(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_up(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_left(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_right(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    _caret_path = Path([[-1.0, 1.5], [0.0, 0.0], [1.0, 1.5]])
    def _draw_caretdown(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretup(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretleft(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretright(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    _x_path = Path([[-1.0, -1.0], [1.0, 1.0],
                    [-1.0, 1.0], [1.0, -1.0]],
                   [Path.MOVETO, Path.LINETO,
                    Path.MOVETO, Path.LINETO])
    def _draw_x(self, renderer, gc, path, path_trans):
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._x_path, transform,
                              path, path_trans)


    def update_from(self, other):
        'copy properties from other to self'
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = other._marker


    def _get_rgb_face(self):
        facecolor = self.get_markerfacecolor()
        if is_string_like(facecolor) and facecolor.lower()=='none':
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        'alias for set_antialiased'
        self.set_antialiased(val)

    def set_c(self, val):
        'alias for set_color'
        self.set_color(val)


    def set_ls(self, val):
        'alias for set_linestyle'
        self.set_linestyle(val)


    def set_lw(self, val):
        'alias for set_linewidth'
        self.set_linewidth(val)


    def set_mec(self, val):
        'alias for set_markeredgecolor'
        self.set_markeredgecolor(val)


    def set_mew(self, val):
        'alias for set_markeredgewidth'
        self.set_markeredgewidth(val)


    def set_mfc(self, val):
        'alias for set_markerfacecolor'
        self.set_markerfacecolor(val)


    def set_ms(self, val):
        'alias for set_markersize'
        self.set_markersize(val)

    def get_aa(self):
        'alias for get_antialiased'
        return self.get_antialiased()

    def get_c(self):
        'alias for get_color'
        return self.get_color()


    def get_ls(self):
        'alias for get_linestyle'
        return self.get_linestyle()


    def get_lw(self):
        'alias for get_linewidth'
        return self.get_linewidth()


    def get_mec(self):
        'alias for get_markeredgecolor'
        return self.get_markeredgecolor()


    def get_mew(self):
        'alias for get_markeredgewidth'
        return self.get_markeredgewidth()


    def get_mfc(self):
        'alias for get_markerfacecolor'
        return self.get_markerfacecolor()


    def get_ms(self):
        'alias for get_markersize'
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_solid_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._solidjoinstyle = s


    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles
        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._dashcapstyle = s


    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles
        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._solidcapstyle = s


    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle


    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle


    def is_dashed(self):
        'return True if line is dashstyle'
        return self._linestyle in ('--', '-.', ':')
Пример #11
0
class Line2D(Artist):
    """
    A line - the line can have both a solid linestyle connecting all
    the vertices, and a marker at each vertex.  Additionally, the
    drawing of the solid line is influenced by the drawstyle, eg one
    can create "stepped" lines in various styles.


    """
    lineStyles = _lineStyles =  { # hidden names deprecated
        '-'          : '_draw_solid',
        '--'         : '_draw_dashed',
        '-.'         : '_draw_dash_dot',
        ':'          : '_draw_dotted',
        'None'       : '_draw_nothing',
        ' '          : '_draw_nothing',
        ''           : '_draw_nothing',
    }

    _drawStyles_l = {
        'default'    : '_draw_lines',
        'steps-mid'  : '_draw_steps_mid',
        'steps-pre'  : '_draw_steps_pre',
        'steps-post' : '_draw_steps_post',
    }

    _drawStyles_s = {
        'steps'      : '_draw_steps_pre',
    }
    drawStyles = {}
    drawStyles.update(_drawStyles_l)
    drawStyles.update(_drawStyles_s)

    markers = _markers =  {  # hidden names deprecated
        '.'  : '_draw_point',
        ','  : '_draw_pixel',
        'o'  : '_draw_circle',
        'v'  : '_draw_triangle_down',
        '^'  : '_draw_triangle_up',
        '<'  : '_draw_triangle_left',
        '>'  : '_draw_triangle_right',
        '1'  : '_draw_tri_down',
        '2'  : '_draw_tri_up',
        '3'  : '_draw_tri_left',
        '4'  : '_draw_tri_right',
        's'  : '_draw_square',
        'p'  : '_draw_pentagon',
        '*'  : '_draw_star',
        'h'  : '_draw_hexagon1',
        'H'  : '_draw_hexagon2',
        '+'  : '_draw_plus',
        'x'  : '_draw_x',
        'D'  : '_draw_diamond',
        'd'  : '_draw_thin_diamond',
        '|'  : '_draw_vline',
        '_'  : '_draw_hline',
        TICKLEFT    : '_draw_tickleft',
        TICKRIGHT   : '_draw_tickright',
        TICKUP      : '_draw_tickup',
        TICKDOWN    : '_draw_tickdown',
        CARETLEFT   : '_draw_caretleft',
        CARETRIGHT  : '_draw_caretright',
        CARETUP     : '_draw_caretup',
        CARETDOWN   : '_draw_caretdown',
        'None' : '_draw_nothing',
        ' ' : '_draw_nothing',
        '' : '_draw_nothing',
    }

    filled_markers = ('o', '^', 'v', '<', '>',
                        's', 'd', 'D', 'h', 'H', 'p', '*')

    zorder = 2
    validCap = ('butt', 'round', 'projecting')
    validJoin =   ('miter', 'round', 'bevel')

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)"%(self._label)
        elif hasattr(self, '_x') and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
                %(self._x[0],self._y[0],self._x[0],self._y[0],self._x[-1],self._y[-1])
        elif hasattr(self, '_x'):
            return "Line2D(%s)"\
                %(",".join(["(%g,%g)"%(x,y) for x,y in zip(self._x,self._y)]))
        else:
            return "Line2D()"

    def __init__(self, xdata, ydata,
                 linewidth       = None, # all Nones default to rc
                 linestyle       = None,
                 color           = None,
                 marker          = None,
                 markersize      = None,
                 markeredgewidth = None,
                 markeredgecolor = None,
                 markerfacecolor = None,
                 antialiased     = None,
                 dash_capstyle   = None,
                 solid_capstyle  = None,
                 dash_joinstyle  = None,
                 solid_joinstyle = None,
                 pickradius      = 5,
                 drawstyle       = None,
                 **kwargs
                 ):
        """
        Create a :class:`~matplotlib.lines.Line2D` instance with *x*
        and *y* data in sequences *xdata*, *ydata*.

        The kwargs are :class:`~matplotlib.lines.Line2D` properties:

        %(Line2D)s

        See :meth:`set_linestyle` for a decription of the line styles,
        :meth:`set_marker` for a description of the markers, and
        :meth:`set_drawstyle` for a description of the draw styles.

        """
        Artist.__init__(self)

        #convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError('xdata must be a sequence')
        if not iterable(ydata):
            raise RuntimeError('ydata must be a sequence')

        if linewidth is None   : linewidth=rcParams['lines.linewidth']

        if linestyle is None   : linestyle=rcParams['lines.linestyle']
        if marker is None      : marker=rcParams['lines.marker']
        if color is None       : color=rcParams['lines.color']

        if markersize is None  : markersize=rcParams['lines.markersize']
        if antialiased is None : antialiased=rcParams['lines.antialiased']
        if dash_capstyle is None : dash_capstyle=rcParams['lines.dash_capstyle']
        if dash_joinstyle is None : dash_joinstyle=rcParams['lines.dash_joinstyle']
        if solid_capstyle is None : solid_capstyle=rcParams['lines.solid_capstyle']
        if solid_joinstyle is None : solid_joinstyle=rcParams['lines.solid_joinstyle']

        if drawstyle is None : drawstyle='default'

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)


        self.set_linestyle(linestyle)
        self.set_drawstyle(drawstyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self.set_marker(marker)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None


        self.set_markerfacecolor(markerfacecolor)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self._point_size_reduction = 0.5

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalid = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """
        Test whether the mouse event occurred on the line.  The pick
        radius determines the precision of the location test (usually
        within five points of the value).  Use
        :meth:`~matplotlib.lines.Line2D.get_pickradius` or
        :meth:`~matplotlib.lines.Line2D.set_pickradius` to view or
        modify it.

        Returns *True* if any values are within the radius along with
        ``{'ind': pointlist}``, where *pointlist* is the set of points
        within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains): return self._contains(self,mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError,"pick radius should be a distance"

        # Make sure we have data to plot
        if self._invalid:
            self.recache()
        if len(self._xy)==0: return False,{}

        # Convert points to pixels
        path, affine = self._transformed_path.get_transformed_path_and_affine()
        path = affine.transform_path(path)
        xy = path.vertices
        xt = xy[:, 0]
        yt = xy[:, 1]

        # Convert pick radius from points to pixels
        if self.figure == None:
            warning.warn('no figure set when check if mouse is on line')
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi/72. * self.pickradius

        # Check for collision
        if self._linestyle in ['None',None]:
            # If no line, return the nearby point(s)
            d = (xt-mouseevent.x)**2 + (yt-mouseevent.y)**2
            ind, = np.nonzero(np.less_equal(d, pixels**2))
        else:
            # If line, return the nearby segment(s)
            ind = segment_hits(mouseevent.x,mouseevent.y,xt,yt,pixels)

        # Debugging message
        if False and self._label != u'':
            print "Checking line",self._label,"at",mouseevent.x,mouseevent.y
            print 'xt', xt
            print 'yt', yt
            #print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print 'ind',ind

        # Return the point(s) within radius
        return len(ind)>0,dict(ind=ind)

    def get_pickradius(self):
        'return the pick radius used for containment tests'
        return self.pickradius

    def set_pickradius(self,d):
        """Sets the pick radius used for containment tests

        ACCEPTS: float distance in points
        """
        self.pickradius = d

    def set_picker(self,p):
        """Sets the event picker details for the line.

        ACCEPTS: float distance in points or callable pick function
        ``fn(artist, event)``
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(self.get_xydata()),
                                 ignore=True)
        # correct for marker size, if any
        if self._marker is not None:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect('units', self.recache)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect('units', self.recache)
    set_axes.__doc__ = Artist.set_axes.__doc__

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: 2D array
        """
        if len(args)==1:
            x, y = args[0]
        else:
            x, y = args

        not_masked = 0
        if not ma.isMaskedArray(x):
            x = np.asarray(x)
            not_masked += 1
        if not ma.isMaskedArray(y):
            y = np.asarray(y)
            not_masked += 1

        if (not_masked < 2 or
            (x is not self._xorig and
             (x.shape != self._xorig.shape or np.any(x != self._xorig))) or
            (y is not self._yorig and
              (y.shape != self._yorig.shape or np.any(y != self._yorig)))):
            self._xorig = x
            self._yorig = y
            self._invalid = True

    def recache(self):
        #if self.axes is None: print 'recache no axes'
        #else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x)==1 and len(y)>1:
            x = x * np.ones(y.shape, float)
        if len(y)==1 and len(x)>1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0] # just a view
        self._y = self._xy[:, 1] # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path, self.get_transform())

        self._invalid = False

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a :class:`matplotlib.transforms.Transform` instance
        """
        Artist.set_transform(self, t)
        self._invalid = True
        # self._transformed_path = TransformedPath(self._path, self.get_transform())

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x)<2: return 1
        return np.alltrue(x[1:]-x[0:-1]>=0)

    def draw(self, renderer):
        if self._invalid:
            self.recache()

        renderer.open_group('line2d')

        if not self._visible: return
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)
        gc.set_snap(self.get_snap())

        funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
        if funcname != '_draw_nothing':
            tpath, affine = self._transformed_path.get_transformed_path_and_affine()
            if len(tpath.vertices):
                self._lineFunc = getattr(self, funcname)
                funcname = self.drawStyles.get(self._drawstyle, '_draw_lines')
                drawFunc = getattr(self, funcname)
                drawFunc(renderer, gc, tpath, affine.frozen())

        if self._marker is not None:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            gc.set_foreground(self.get_markeredgecolor())
            gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            funcname = self._markers.get(self._marker, '_draw_nothing')
            if funcname != '_draw_nothing':
                tpath, affine = self._transformed_path.get_transformed_points_and_affine()
                if len(tpath.vertices):
                    markerFunc = getattr(self, funcname)
                    markerFunc(renderer, gc, tpath, affine.frozen())

        renderer.close_group('line2d')

    def get_antialiased(self): return self._antialiased
    def get_color(self): return self._color
    def get_drawstyle(self): return self._drawstyle
    def get_linestyle(self): return self._linestyle

    def get_linewidth(self): return self._linewidth
    def get_marker(self): return self._marker

    def get_markeredgecolor(self):
        if (is_string_like(self._markeredgecolor) and
            self._markeredgecolor == 'auto'):
            if self._marker in self.filled_markers:
                return 'k'
            else:
                return self._color
        else:
            return self._markeredgecolor


        return self._markeredgecolor
    def get_markeredgewidth(self): return self._markeredgewidth

    def get_markerfacecolor(self):
        if (self._markerfacecolor is None or
            (is_string_like(self._markerfacecolor) and
             self._markerfacecolor.lower()=='none') ):
            return self._markerfacecolor
        elif (is_string_like(self._markerfacecolor) and
              self._markerfacecolor.lower() == 'auto'):
            return self._color
        else:
            return self._markerfacecolor


    def get_markersize(self): return self._markersize

    def get_data(self, orig=True):
        """
        Return the xdata, ydata.

        If *orig* is *True*, return the original data
        """
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)


    def get_xdata(self, orig=True):
        """
        Return the xdata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._xorig
        if self._invalid:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        Return the ydata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._yorig
        if self._invalid:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the :class:`~matplotlib.path.Path` object associated
        with this line.
        """
        if self._invalid:
            self.recache()
        return self._path

    def get_xydata(self):
        """
        Return the *xy* data as a Nx2 numpy array.
        """
        if self._invalid:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_drawstyle(self, drawstyle):
        """
        Set the drawstyle of the plot

        'default' connects the points with lines. The steps variants
        produce step-plots. 'steps' is equivalent to 'steps-pre' and
        is maintained for backward-compatibility.

        ACCEPTS: [ 'default' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' ]
        """
        self._drawstyle = drawstyle

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line (also accepts drawstyles)


        ================    =================
        linestyle           description
        ================    =================
        '-'                 solid
        '--'                dashed
        '-.'                dash_dot
        ':'                 dotted
        'None'              draw nothing
        ' '                 draw nothing
        ''                  draw nothing
        ================    =================

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        .. seealso::
            :meth:`set_drawstyle`

        ACCEPTS: [ '-' | '--' | '-.' | ':' | 'None' | ' ' | '' ] and
        any drawstyle in combination with a linestyle, e.g. 'steps--'.
        """

        # handle long drawstyle names before short ones !
        for ds in flatten([k.keys() for k in (self._drawStyles_l,
                self._drawStyles_s)], is_string_like):
            if linestyle.startswith(ds):
                self.set_drawstyle(ds)
                if len(linestyle) > len(ds):
                    linestyle = linestyle[len(ds):]
                else:
                    linestyle = '-'

        if linestyle not in self._lineStyles:
            if linestyle in ls_mapper:
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report('Unrecognized line style %s, %s' %
                                            (linestyle, type(linestyle)))
        if linestyle in [' ','']:
            linestyle = 'None'
        self._linestyle = linestyle

    def set_marker(self, marker):
        """
        Set the line marker

        ========== ==========================
        marker     description
        ========== ==========================
        '.'        point
        ','        pixel
        'o'        circle
        'v'        triangle_down
        '^'        triangle_up
        '<'        triangle_left
        '>'        triangle_right
        '1'        tri_down
        '2'        tri_up
        '3'        tri_left
        '4'        tri_right
        's'        square
        'p'        pentagon
        '*'        star
        'h'        hexagon1
        'H'        hexagon2
        '+'        plus
        'x'        x
        'D'        diamond
        'd'        thin_diamond
        '|'        vline
        '_'        hline
        TICKLEFT   tickleft
        TICKRIGHT  tickright
        TICKUP     tickup
        TICKDOWN   tickdown
        CARETLEFT  caretleft
        CARETRIGHT caretright
        CARETUP    caretup
        CARETDOWN  caretdown
        'None'     nothing
        ' '        nothing
        ''         nothing
        ========== ==========================



        ACCEPTS: [ '+' | '*' | ',' | '.' | '1' | '2' | '3' | '4'
                 | '<' | '>' | 'D' | 'H' | '^' | '_' | 'd'
                 | 'h' | 'o' | 'p' | 's' | 'v' | 'x' | '|'
                 | TICKUP | TICKDOWN | TICKLEFT | TICKRIGHT
                 | 'None' | ' ' | '' ]

        """
        if marker not in self._markers:
            verbose.report('Unrecognized marker style %s, %s' %
                                            (marker, type(marker)))
        if marker in [' ','']:
            marker = 'None'
        self._marker = marker
        self._markerFunc = self._markers[marker]

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        if ec is None :
            ec = 'auto'
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        if ew is None :
            ew = rcParams['lines.markeredgewidth']
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color

        ACCEPTS: any matplotlib color
        """
        if fc is None :
            fc = 'auto'
        self._markerfacecolor = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: 1D array
        """
        x = np.asarray(x)
        self.set_data(x, self._yorig)

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: 1D array
        """
        y = np.asarray(y)
        self.set_data(self._xorig, y)

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq)==0:
            self.set_linestyle('-')
        else:
            self.set_linestyle('--')
        self._dashSeq = seq  # TODO: offset ignored for now


    def _draw_lines(self, renderer, gc, path, trans):
        self._lineFunc(renderer, gc, path, trans)

    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())


    def _draw_nothing(self, *args, **kwargs):
        pass

    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle('solid')
        renderer.draw_path(gc, path, trans)

    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle('dashed')
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)


    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle('dashdot')
        renderer.draw_path(gc, path, trans)


    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle('dotted')
        renderer.draw_path(gc, path, trans)


    def _draw_point(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * \
            self._point_size_reduction * 0.5
        gc.set_snap(renderer.points_to_pixels(self._markersize) > 3.0)
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)

    _draw_pixel_transform = Affine2D().translate(-0.5, -0.5)
    def _draw_pixel(self, renderer, gc, path, path_trans):
        rgbFace = self._get_rgb_face()
        gc.set_snap(False)
        renderer.draw_markers(gc, Path.unit_rectangle(),
                              self._draw_pixel_transform,
                              path, path_trans, rgbFace)


    def _draw_circle(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * 0.5
        gc.set_snap(renderer.points_to_pixels(self._markersize) > 3.0)
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w, w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)


    _triangle_path = Path([[0.0, 1.0], [-1.0, -1.0], [1.0, -1.0], [0.0, 1.0]])
    def _draw_triangle_up(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_down(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, -offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_left(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_right(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(-90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_square(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 2.0)
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_diamond(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).rotate_deg(45).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_thin_diamond(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5) \
            .rotate_deg(45).scale(offset * 0.6, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_pentagon(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(5), transform,
                              path, path_trans, rgbFace)

    def _draw_star(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        _starpath = Path.unit_regular_star(5, innerCircle=0.381966)
        renderer.draw_markers(gc, _starpath, transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon1(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon2(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(30)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    _line_marker_path = Path([[0.0, -1.0], [0.0, 1.0]])
    def _draw_vline(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    def _draw_hline(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    _tickhoriz_path = Path([[0.0, 0.0], [1.0, 0.0]])
    def _draw_tickleft(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(-offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    def _draw_tickright(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    _tickvert_path = Path([[-0.0, 0.0], [-0.0, 1.0]])
    def _draw_tickup(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    def _draw_tickdown(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, -offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    _plus_path = Path([[-1.0, 0.0], [1.0, 0.0],
                       [0.0, -1.0], [0.0, 1.0]],
                      [Path.MOVETO, Path.LINETO,
                       Path.MOVETO, Path.LINETO])
    def _draw_plus(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._plus_path, transform,
                              path, path_trans)


    _tri_path = Path([[0.0, 0.0], [0.0, -1.0],
                      [0.0, 0.0], [0.8, 0.5],
                      [0.0, 0.0], [-0.8, 0.5]],
                     [Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO])
    def _draw_tri_down(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_up(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_left(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_right(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    _caret_path = Path([[-1.0, 1.5], [0.0, 0.0], [1.0, 1.5]])
    def _draw_caretdown(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretup(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretleft(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretright(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    _x_path = Path([[-1.0, -1.0], [1.0, 1.0],
                    [-1.0, 1.0], [1.0, -1.0]],
                   [Path.MOVETO, Path.LINETO,
                    Path.MOVETO, Path.LINETO])
    def _draw_x(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._x_path, transform,
                              path, path_trans)


    def update_from(self, other):
        'copy properties from other to self'
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = other._marker
        self._drawstyle = other._drawstyle


    def _get_rgb_face(self):
        facecolor = self.get_markerfacecolor()
        if is_string_like(facecolor) and facecolor.lower()=='none':
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        'alias for set_antialiased'
        self.set_antialiased(val)

    def set_c(self, val):
        'alias for set_color'
        self.set_color(val)


    def set_ls(self, val):
        'alias for set_linestyle'
        self.set_linestyle(val)


    def set_lw(self, val):
        'alias for set_linewidth'
        self.set_linewidth(val)


    def set_mec(self, val):
        'alias for set_markeredgecolor'
        self.set_markeredgecolor(val)


    def set_mew(self, val):
        'alias for set_markeredgewidth'
        self.set_markeredgewidth(val)


    def set_mfc(self, val):
        'alias for set_markerfacecolor'
        self.set_markerfacecolor(val)


    def set_ms(self, val):
        'alias for set_markersize'
        self.set_markersize(val)

    def get_aa(self):
        'alias for get_antialiased'
        return self.get_antialiased()

    def get_c(self):
        'alias for get_color'
        return self.get_color()


    def get_ls(self):
        'alias for get_linestyle'
        return self.get_linestyle()


    def get_lw(self):
        'alias for get_linewidth'
        return self.get_linewidth()


    def get_mec(self):
        'alias for get_markeredgecolor'
        return self.get_markeredgecolor()


    def get_mew(self):
        'alias for get_markeredgewidth'
        return self.get_markeredgewidth()


    def get_mfc(self):
        'alias for get_markerfacecolor'
        return self.get_markerfacecolor()


    def get_ms(self):
        'alias for get_markersize'
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_solid_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._solidjoinstyle = s


    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles

        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._dashcapstyle = s


    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles

        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._solidcapstyle = s


    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle


    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle


    def is_dashed(self):
        'return True if line is dashstyle'
        return self._linestyle in ('--', '-.', ':')
Пример #12
0
class Line2D(Artist):
    """
    A line - the line can have both a solid linestyle connecting all
    the vertices, and a marker at each vertex.  Additionally, the
    drawing of the solid line is influenced by the drawstyle, eg one
    can create "stepped" lines in various styles.


    """
    lineStyles = _lineStyles =  { # hidden names deprecated
        '-'          : '_draw_solid',
        '--'         : '_draw_dashed',
        '-.'         : '_draw_dash_dot',
        ':'          : '_draw_dotted',
        'None'       : '_draw_nothing',
        ' '          : '_draw_nothing',
        ''           : '_draw_nothing',
    }

    _drawStyles_l = {
        'default'    : '_draw_lines',
        'steps-mid'  : '_draw_steps_mid',
        'steps-pre'  : '_draw_steps_pre',
        'steps-post' : '_draw_steps_post',
    }

    _drawStyles_s = {
        'steps'      : '_draw_steps_pre',
    }
    drawStyles = {}
    drawStyles.update(_drawStyles_l)
    drawStyles.update(_drawStyles_s)

    markers = _markers =  {  # hidden names deprecated
        '.'  : '_draw_point',
        ','  : '_draw_pixel',
        'o'  : '_draw_circle',
        'v'  : '_draw_triangle_down',
        '^'  : '_draw_triangle_up',
        '<'  : '_draw_triangle_left',
        '>'  : '_draw_triangle_right',
        '1'  : '_draw_tri_down',
        '2'  : '_draw_tri_up',
        '3'  : '_draw_tri_left',
        '4'  : '_draw_tri_right',
        's'  : '_draw_square',
        'p'  : '_draw_pentagon',
        '*'  : '_draw_star',
        'h'  : '_draw_hexagon1',
        'H'  : '_draw_hexagon2',
        '+'  : '_draw_plus',
        'x'  : '_draw_x',
        'D'  : '_draw_diamond',
        'd'  : '_draw_thin_diamond',
        '|'  : '_draw_vline',
        '_'  : '_draw_hline',
        TICKLEFT    : '_draw_tickleft',
        TICKRIGHT   : '_draw_tickright',
        TICKUP      : '_draw_tickup',
        TICKDOWN    : '_draw_tickdown',
        CARETLEFT   : '_draw_caretleft',
        CARETRIGHT  : '_draw_caretright',
        CARETUP     : '_draw_caretup',
        CARETDOWN   : '_draw_caretdown',
        'None' : '_draw_nothing',
        ' ' : '_draw_nothing',
        '' : '_draw_nothing',
    }

    filled_markers = ('o', '^', 'v', '<', '>',
                        's', 'd', 'D', 'h', 'H', 'p', '*')

    zorder = 2
    validCap = ('butt', 'round', 'projecting')
    validJoin =   ('miter', 'round', 'bevel')

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)"%(self._label)
        elif hasattr(self, '_x') and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
                %(self._x[0],self._y[0],self._x[0],self._y[0],self._x[-1],self._y[-1])
        elif hasattr(self, '_x'):
            return "Line2D(%s)"\
                %(",".join(["(%g,%g)"%(x,y) for x,y in zip(self._x,self._y)]))
        else:
            return "Line2D()"

    def __init__(self, xdata, ydata,
                 linewidth       = None, # all Nones default to rc
                 linestyle       = None,
                 color           = None,
                 marker          = None,
                 markersize      = None,
                 markeredgewidth = None,
                 markeredgecolor = None,
                 markerfacecolor = None,
                 antialiased     = None,
                 dash_capstyle   = None,
                 solid_capstyle  = None,
                 dash_joinstyle  = None,
                 solid_joinstyle = None,
                 pickradius      = 5,
                 drawstyle       = None,
                 **kwargs
                 ):
        """
        Create a :class:`~matplotlib.lines.Line2D` instance with *x*
        and *y* data in sequences *xdata*, *ydata*.

        The kwargs are :class:`~matplotlib.lines.Line2D` properties:

        %(Line2D)s

        See :meth:`set_linestyle` for a decription of the line styles,
        :meth:`set_marker` for a description of the markers, and
        :meth:`set_drawstyle` for a description of the draw styles.

        """
        Artist.__init__(self)

        #convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError('xdata must be a sequence')
        if not iterable(ydata):
            raise RuntimeError('ydata must be a sequence')

        if linewidth is None   : linewidth=rcParams['lines.linewidth']

        if linestyle is None   : linestyle=rcParams['lines.linestyle']
        if marker is None      : marker=rcParams['lines.marker']
        if color is None       : color=rcParams['lines.color']

        if markersize is None  : markersize=rcParams['lines.markersize']
        if antialiased is None : antialiased=rcParams['lines.antialiased']
        if dash_capstyle is None : dash_capstyle=rcParams['lines.dash_capstyle']
        if dash_joinstyle is None : dash_joinstyle=rcParams['lines.dash_joinstyle']
        if solid_capstyle is None : solid_capstyle=rcParams['lines.solid_capstyle']
        if solid_joinstyle is None : solid_joinstyle=rcParams['lines.solid_joinstyle']

        if drawstyle is None : drawstyle='default'

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)


        self.set_linestyle(linestyle)
        self.set_drawstyle(drawstyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self.set_marker(marker)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None


        self.set_markerfacecolor(markerfacecolor)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self._point_size_reduction = 0.5

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalid = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """
        Test whether the mouse event occurred on the line.  The pick
        radius determines the precision of the location test (usually
        within five points of the value).  Use
        :meth:`~matplotlib.lines.Line2D.get_pickradius` or
        :meth:`~matplotlib.lines.Line2D.set_pickradius` to view or
        modify it.

        Returns *True* if any values are within the radius along with
        ``{'ind': pointlist}``, where *pointlist* is the set of points
        within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains): return self._contains(self,mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError,"pick radius should be a distance"

        # Make sure we have data to plot
        if self._invalid:
            self.recache()
        if len(self._xy)==0: return False,{}

        # Convert points to pixels
        path, affine = self._transformed_path.get_transformed_path_and_affine()
        path = affine.transform_path(path)
        xy = path.vertices
        xt = xy[:, 0]
        yt = xy[:, 1]

        # Convert pick radius from points to pixels
        if self.figure == None:
            warning.warn('no figure set when check if mouse is on line')
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi/72. * self.pickradius

        # Check for collision
        if self._linestyle in ['None',None]:
            # If no line, return the nearby point(s)
            d = (xt-mouseevent.x)**2 + (yt-mouseevent.y)**2
            ind, = np.nonzero(np.less_equal(d, pixels**2))
        else:
            # If line, return the nearby segment(s)
            ind = segment_hits(mouseevent.x,mouseevent.y,xt,yt,pixels)

        # Debugging message
        if False and self._label != u'':
            print "Checking line",self._label,"at",mouseevent.x,mouseevent.y
            print 'xt', xt
            print 'yt', yt
            #print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print 'ind',ind

        # Return the point(s) within radius
        return len(ind)>0,dict(ind=ind)

    def get_pickradius(self):
        'return the pick radius used for containment tests'
        return self.pickradius

    def setpickradius(self,d):
        """Sets the pick radius used for containment tests

        ACCEPTS: float distance in points
        """
        self.pickradius = d

    def set_picker(self,p):
        """Sets the event picker details for the line.

        ACCEPTS: float distance in points or callable pick function
        ``fn(artist, event)``
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(self.get_xydata()),
                                 ignore=True)
        # correct for marker size, if any
        if self._marker is not None:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect('units', self.recache)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect('units', self.recache)
    set_axes.__doc__ = Artist.set_axes.__doc__

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: 2D array
        """
        if len(args)==1:
            x, y = args[0]
        else:
            x, y = args

        not_masked = 0
        if not ma.isMaskedArray(x):
            x = np.asarray(x)
            not_masked += 1
        if not ma.isMaskedArray(y):
            y = np.asarray(y)
            not_masked += 1

        if (not_masked < 2 or
            (x is not self._xorig and
             (x.shape != self._xorig.shape or np.any(x != self._xorig))) or
            (y is not self._yorig and
              (y.shape != self._yorig.shape or np.any(y != self._yorig)))):
            self._xorig = x
            self._yorig = y
            self._invalid = True

    def recache(self):
        #if self.axes is None: print 'recache no axes'
        #else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x)==1 and len(y)>1:
            x = x * np.ones(y.shape, float)
        if len(y)==1 and len(x)>1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0] # just a view
        self._y = self._xy[:, 1] # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path, self.get_transform())

        self._invalid = False

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a :class:`matplotlib.transforms.Transform` instance
        """
        Artist.set_transform(self, t)
        self._invalid = True
        # self._transformed_path = TransformedPath(self._path, self.get_transform())

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x)<2: return 1
        return np.alltrue(x[1:]-x[0:-1]>=0)

    def draw(self, renderer):
        if self._invalid:
            self.recache()

        renderer.open_group('line2d')

        if not self._visible: return
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)
        gc.set_snap(self.get_snap())

        funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
        if funcname != '_draw_nothing':
            tpath, affine = self._transformed_path.get_transformed_path_and_affine()
            self._lineFunc = getattr(self, funcname)
            funcname = self.drawStyles.get(self._drawstyle, '_draw_lines')
            drawFunc = getattr(self, funcname)
            drawFunc(renderer, gc, tpath, affine.frozen())

        if self._marker is not None:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            gc.set_foreground(self.get_markeredgecolor())
            gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            funcname = self._markers.get(self._marker, '_draw_nothing')
            if funcname != '_draw_nothing':
                tpath, affine = self._transformed_path.get_transformed_points_and_affine()
                markerFunc = getattr(self, funcname)
                markerFunc(renderer, gc, tpath, affine.frozen())

        renderer.close_group('line2d')

    def get_antialiased(self): return self._antialiased
    def get_color(self): return self._color
    def get_drawstyle(self): return self._drawstyle
    def get_linestyle(self): return self._linestyle

    def get_linewidth(self): return self._linewidth
    def get_marker(self): return self._marker

    def get_markeredgecolor(self):
        if (is_string_like(self._markeredgecolor) and
            self._markeredgecolor == 'auto'):
            if self._marker in self.filled_markers:
                return 'k'
            else:
                return self._color
        else:
            return self._markeredgecolor


        return self._markeredgecolor
    def get_markeredgewidth(self): return self._markeredgewidth

    def get_markerfacecolor(self):
        if (self._markerfacecolor is None or
            (is_string_like(self._markerfacecolor) and
             self._markerfacecolor.lower()=='none') ):
            return self._markerfacecolor
        elif (is_string_like(self._markerfacecolor) and
              self._markerfacecolor.lower() == 'auto'):
            return self._color
        else:
            return self._markerfacecolor


    def get_markersize(self): return self._markersize

    def get_data(self, orig=True):
        """
        Return the xdata, ydata.

        If *orig* is *True*, return the original data
        """
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)


    def get_xdata(self, orig=True):
        """
        Return the xdata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._xorig
        if self._invalid:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        Return the ydata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._yorig
        if self._invalid:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the :class:`~matplotlib.path.Path` object associated
        with this line.
        """
        if self._invalid:
            self.recache()
        return self._path

    def get_xydata(self):
        """
        Return the *xy* data as a Nx2 numpy array.
        """
        if self._invalid:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_drawstyle(self, drawstyle):
        """
        Set the drawstyle of the plot

        'default' connects the points with lines. The steps variants
        produce step-plots. 'steps' is equivalent to 'steps-pre' and
        is maintained for backward-compatibility.

        ACCEPTS: [ 'default' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' ]
        """
        self._drawstyle = drawstyle

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line (also accepts drawstyles)


        ================    =================
        linestyle           description
        ================    =================
        '-'                 solid
        '--'                dashed
        '-.'                dash_dot
        ':'                 dotted
        'None'              draw nothing
        ' '                 draw nothing
        ''                  draw nothing
        ================    =================

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        .. seealso::
            :meth:`set_drawstyle`

        ACCEPTS: [ '-' | '--' | '-.' | ':' | 'None' | ' ' | '' ] and
        any drawstyle in combination with a linestyle, e.g. 'steps--'.
        """

        # handle long drawstyle names before short ones !
        for ds in flatten([k.keys() for k in (self._drawStyles_l,
                self._drawStyles_s)], is_string_like):
            if linestyle.startswith(ds):
                self.set_drawstyle(ds)
                if len(linestyle) > len(ds):
                    linestyle = linestyle[len(ds):]
                else:
                    linestyle = '-'

        if linestyle not in self._lineStyles:
            if linestyle in ls_mapper:
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report('Unrecognized line style %s, %s' %
                                            (linestyle, type(linestyle)))
        if linestyle in [' ','']:
            linestyle = 'None'
        self._linestyle = linestyle

    def set_marker(self, marker):
        """
        Set the line marker

        ========== ==========================
        marker     description
        ========== ==========================
        '.'        point
        ','        pixel
        'o'        circle
        'v'        triangle_down
        '^'        triangle_up
        '<'        triangle_left
        '>'        triangle_right
        '1'        tri_down
        '2'        tri_up
        '3'        tri_left
        '4'        tri_right
        's'        square
        'p'        pentagon
        '*'        star
        'h'        hexagon1
        'H'        hexagon2
        '+'        plus
        'x'        x
        'D'        diamond
        'd'        thin_diamond
        '|'        vline
        '_'        hline
        TICKLEFT   tickleft
        TICKRIGHT  tickright
        TICKUP     tickup
        TICKDOWN   tickdown
        CARETLEFT  caretleft
        CARETRIGHT caretright
        CARETUP    caretup
        CARETDOWN  caretdown
        'None'     nothing
        ' '        nothing
        ''         nothing
        ========== ==========================



        ACCEPTS: [ '+' | '*' | ',' | '.' | '1' | '2' | '3' | '4'
                 | '<' | '>' | 'D' | 'H' | '^' | '_' | 'd'
                 | 'h' | 'o' | 'p' | 's' | 'v' | 'x' | '|'
                 | TICKUP | TICKDOWN | TICKLEFT | TICKRIGHT
                 | 'None' | ' ' | '' ]

        """
        if marker not in self._markers:
            verbose.report('Unrecognized marker style %s, %s' %
                                            (marker, type(marker)))
        if marker in [' ','']:
            marker = 'None'
        self._marker = marker
        self._markerFunc = self._markers[marker]

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        if ec is None :
            ec = 'auto'
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        if ew is None :
            ew = rcParams['lines.markeredgewidth']
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color

        ACCEPTS: any matplotlib color
        """
        if fc is None :
            fc = 'auto'
        self._markerfacecolor = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: 1D array
        """
        x = np.asarray(x)
        self.set_data(x, self._yorig)

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: 1D array
        """
        y = np.asarray(y)
        self.set_data(self._xorig, y)

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq)==0:
            self.set_linestyle('-')
        else:
            self.set_linestyle('--')
        self._dashSeq = seq  # TODO: offset ignored for now


    def _draw_lines(self, renderer, gc, path, trans):
        self._lineFunc(renderer, gc, path, trans)

    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())


    def _draw_nothing(self, *args, **kwargs):
        pass

    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle('solid')
        renderer.draw_path(gc, path, trans)

    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle('dashed')
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)


    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle('dashdot')
        renderer.draw_path(gc, path, trans)


    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle('dotted')
        renderer.draw_path(gc, path, trans)


    def _draw_point(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * \
            self._point_size_reduction * 0.5
        gc.set_snap(renderer.points_to_pixels(self._markersize) > 3.0)
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)

    _draw_pixel_transform = Affine2D().translate(-0.5, -0.5)
    def _draw_pixel(self, renderer, gc, path, path_trans):
        rgbFace = self._get_rgb_face()
        gc.set_snap(False)
        renderer.draw_markers(gc, Path.unit_rectangle(),
                              self._draw_pixel_transform,
                              path, path_trans, rgbFace)


    def _draw_circle(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * 0.5
        gc.set_snap(renderer.points_to_pixels(self._markersize) > 3.0)
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w, w)
        renderer.draw_markers(
            gc, Path.unit_circle(), transform, path, path_trans,
            rgbFace)


    _triangle_path = Path([[0.0, 1.0], [-1.0, -1.0], [1.0, -1.0], [0.0, 1.0]])
    def _draw_triangle_up(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_down(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, -offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_left(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_triangle_right(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(-90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform,
                              path, path_trans, rgbFace)


    def _draw_square(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 2.0)
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_diamond(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).rotate_deg(45).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_thin_diamond(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5) \
            .rotate_deg(45).scale(offset * 0.6, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform,
                              path, path_trans, rgbFace)


    def _draw_pentagon(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(5), transform,
                              path, path_trans, rgbFace)

    def _draw_star(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        _starpath = Path.unit_regular_star(5, innerCircle=0.381966)
        renderer.draw_markers(gc, _starpath, transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon1(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    def _draw_hexagon2(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(30)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform,
                              path, path_trans, rgbFace)


    _line_marker_path = Path([[0.0, -1.0], [0.0, 1.0]])
    def _draw_vline(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    def _draw_hline(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._line_marker_path, transform,
                              path, path_trans)


    _tickhoriz_path = Path([[0.0, 0.0], [1.0, 0.0]])
    def _draw_tickleft(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(-offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    def _draw_tickright(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform,
                              path, path_trans)


    _tickvert_path = Path([[-0.0, 0.0], [-0.0, 1.0]])
    def _draw_tickup(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    def _draw_tickdown(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 1.0)
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, -offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform,
                              path, path_trans)


    _plus_path = Path([[-1.0, 0.0], [1.0, 0.0],
                       [0.0, -1.0], [0.0, 1.0]],
                      [Path.MOVETO, Path.LINETO,
                       Path.MOVETO, Path.LINETO])
    def _draw_plus(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._plus_path, transform,
                              path, path_trans)


    _tri_path = Path([[0.0, 0.0], [0.0, -1.0],
                      [0.0, 0.0], [0.8, 0.5],
                      [0.0, 0.0], [-0.8, 0.5]],
                     [Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO,
                      Path.MOVETO, Path.LINETO])
    def _draw_tri_down(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_up(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_left(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    def _draw_tri_right(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 5.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._tri_path, transform,
                              path, path_trans)


    _caret_path = Path([[-1.0, 1.5], [0.0, 0.0], [1.0, 1.5]])
    def _draw_caretdown(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretup(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretleft(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    def _draw_caretright(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._caret_path, transform,
                              path, path_trans)


    _x_path = Path([[-1.0, -1.0], [1.0, 1.0],
                    [-1.0, 1.0], [1.0, -1.0]],
                   [Path.MOVETO, Path.LINETO,
                    Path.MOVETO, Path.LINETO])
    def _draw_x(self, renderer, gc, path, path_trans):
        gc.set_snap(renderer.points_to_pixels(self._markersize) >= 3.0)
        offset = 0.5*renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._x_path, transform,
                              path, path_trans)


    def update_from(self, other):
        'copy properties from other to self'
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = other._marker
        self._drawstyle = other._drawstyle


    def _get_rgb_face(self):
        facecolor = self.get_markerfacecolor()
        if is_string_like(facecolor) and facecolor.lower()=='none':
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        'alias for set_antialiased'
        self.set_antialiased(val)

    def set_c(self, val):
        'alias for set_color'
        self.set_color(val)


    def set_ls(self, val):
        'alias for set_linestyle'
        self.set_linestyle(val)


    def set_lw(self, val):
        'alias for set_linewidth'
        self.set_linewidth(val)


    def set_mec(self, val):
        'alias for set_markeredgecolor'
        self.set_markeredgecolor(val)


    def set_mew(self, val):
        'alias for set_markeredgewidth'
        self.set_markeredgewidth(val)


    def set_mfc(self, val):
        'alias for set_markerfacecolor'
        self.set_markerfacecolor(val)


    def set_ms(self, val):
        'alias for set_markersize'
        self.set_markersize(val)

    def get_aa(self):
        'alias for get_antialiased'
        return self.get_antialiased()

    def get_c(self):
        'alias for get_color'
        return self.get_color()


    def get_ls(self):
        'alias for get_linestyle'
        return self.get_linestyle()


    def get_lw(self):
        'alias for get_linewidth'
        return self.get_linewidth()


    def get_mec(self):
        'alias for get_markeredgecolor'
        return self.get_markeredgecolor()


    def get_mew(self):
        'alias for get_markeredgewidth'
        return self.get_markeredgewidth()


    def get_mfc(self):
        'alias for get_markerfacecolor'
        return self.get_markerfacecolor()


    def get_ms(self):
        'alias for get_markersize'
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_solid_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._solidjoinstyle = s


    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles

        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._dashcapstyle = s


    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles

        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._solidcapstyle = s


    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle


    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle


    def is_dashed(self):
        'return True if line is dashstyle'
        return self._linestyle in ('--', '-.', ':')
Пример #13
0
class Line2D(Artist):
    """
    A line - the line can have both a solid linestyle connecting all
    the vertices, and a marker at each vertex.  Additionally, the
    drawing of the solid line is influenced by the drawstyle, eg one
    can create "stepped" lines in various styles.


    """
    lineStyles = _lineStyles =  { # hidden names deprecated
        '-'          : '_draw_solid',
        '--'         : '_draw_dashed',
        '-.'         : '_draw_dash_dot',
        ':'          : '_draw_dotted',
        'None'       : '_draw_nothing',
        ' '          : '_draw_nothing',
        ''           : '_draw_nothing',
    }

    _drawStyles_l = {
        'default': '_draw_lines',
        'steps-mid': '_draw_steps_mid',
        'steps-pre': '_draw_steps_pre',
        'steps-post': '_draw_steps_post',
    }

    _drawStyles_s = {
        'steps': '_draw_steps_pre',
    }
    drawStyles = {}
    drawStyles.update(_drawStyles_l)
    drawStyles.update(_drawStyles_s)
    # Need a list ordered with long names first:
    drawStyleKeys = _drawStyles_l.keys() + _drawStyles_s.keys()

    # Referenced here to maintain API.  These are defined in
    # MarkerStyle
    markers = MarkerStyle.markers
    filled_markers = MarkerStyle.filled_markers
    fillStyles = MarkerStyle.fillstyles

    zorder = 2
    validCap = ('butt', 'round', 'projecting')
    validJoin = ('miter', 'round', 'bevel')

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)" % (self._label)
        elif hasattr(self, '_x') and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
                %(self._x[0],self._y[0],self._x[0],self._y[0],self._x[-1],self._y[-1])
        elif hasattr(self, '_x'):
            return "Line2D(%s)"\
                %(",".join(["(%g,%g)"%(x,y) for x,y in zip(self._x,self._y)]))
        else:
            return "Line2D()"

    def __init__(
            self,
            xdata,
            ydata,
            linewidth=None,  # all Nones default to rc
            linestyle=None,
            color=None,
            marker=None,
            markersize=None,
            markeredgewidth=None,
            markeredgecolor=None,
            markerfacecolor=None,
            markerfacecoloralt='none',
            fillstyle='full',
            antialiased=None,
            dash_capstyle=None,
            solid_capstyle=None,
            dash_joinstyle=None,
            solid_joinstyle=None,
            pickradius=5,
            drawstyle=None,
            markevery=None,
            **kwargs):
        """
        Create a :class:`~matplotlib.lines.Line2D` instance with *x*
        and *y* data in sequences *xdata*, *ydata*.

        The kwargs are :class:`~matplotlib.lines.Line2D` properties:

        %(Line2D)s

        See :meth:`set_linestyle` for a decription of the line styles,
        :meth:`set_marker` for a description of the markers, and
        :meth:`set_drawstyle` for a description of the draw styles.

        """
        Artist.__init__(self)

        #convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError('xdata must be a sequence')
        if not iterable(ydata):
            raise RuntimeError('ydata must be a sequence')

        if linewidth is None: linewidth = rcParams['lines.linewidth']

        if linestyle is None: linestyle = rcParams['lines.linestyle']
        if marker is None: marker = rcParams['lines.marker']
        if color is None: color = rcParams['lines.color']

        if markersize is None: markersize = rcParams['lines.markersize']
        if antialiased is None: antialiased = rcParams['lines.antialiased']
        if dash_capstyle is None:
            dash_capstyle = rcParams['lines.dash_capstyle']
        if dash_joinstyle is None:
            dash_joinstyle = rcParams['lines.dash_joinstyle']
        if solid_capstyle is None:
            solid_capstyle = rcParams['lines.solid_capstyle']
        if solid_joinstyle is None:
            solid_joinstyle = rcParams['lines.solid_joinstyle']

        if drawstyle is None: drawstyle = 'default'

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)

        self.set_linestyle(linestyle)
        self.set_drawstyle(drawstyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self._marker = MarkerStyle()
        self.set_marker(marker)
        self.set_markevery(markevery)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None

        self.set_markerfacecolor(markerfacecolor)
        self.set_markerfacecoloralt(markerfacecoloralt)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self.set_fillstyle(fillstyle)

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        self.ind_offset = 0
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalidx = True
        self._invalidy = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """
        Test whether the mouse event occurred on the line.  The pick
        radius determines the precision of the location test (usually
        within five points of the value).  Use
        :meth:`~matplotlib.lines.Line2D.get_pickradius` or
        :meth:`~matplotlib.lines.Line2D.set_pickradius` to view or
        modify it.

        Returns *True* if any values are within the radius along with
        ``{'ind': pointlist}``, where *pointlist* is the set of points
        within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains): return self._contains(self, mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError, "pick radius should be a distance"

        # Make sure we have data to plot
        if self._invalidy or self._invalidx:
            self.recache()
        if len(self._xy) == 0: return False, {}

        # Convert points to pixels
        if self._transformed_path is None:
            self._transform_path()
        path, affine = self._transformed_path.get_transformed_path_and_affine()
        path = affine.transform_path(path)
        xy = path.vertices
        xt = xy[:, 0]
        yt = xy[:, 1]

        # Convert pick radius from points to pixels
        if self.figure == None:
            warning.warn('no figure set when check if mouse is on line')
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi / 72. * self.pickradius

        # Check for collision
        if self._linestyle in ['None', None]:
            # If no line, return the nearby point(s)
            d = (xt - mouseevent.x)**2 + (yt - mouseevent.y)**2
            ind, = np.nonzero(np.less_equal(d, pixels**2))
        else:
            # If line, return the nearby segment(s)
            ind = segment_hits(mouseevent.x, mouseevent.y, xt, yt, pixels)

        ind += self.ind_offset

        # Debugging message
        if False and self._label != u'':
            print "Checking line", self._label, "at", mouseevent.x, mouseevent.y
            print 'xt', xt
            print 'yt', yt
            #print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print 'ind', ind

        # Return the point(s) within radius
        return len(ind) > 0, dict(ind=ind)

    def get_pickradius(self):
        'return the pick radius used for containment tests'
        return self.pickradius

    def set_pickradius(self, d):
        """Sets the pick radius used for containment tests

        ACCEPTS: float distance in points
        """
        self.pickradius = d

    def get_fillstyle(self):
        """
        return the marker fillstyle
        """
        return self._marker.get_fillstyle()

    def set_fillstyle(self, fs):
        """
        Set the marker fill style; 'full' means fill the whole marker.
        The other options are for half filled markers

        ACCEPTS: ['full' | 'left' | 'right' | 'bottom' | 'top']
        """
        self._marker.set_fillstyle(fs)

    def set_markevery(self, every):
        """
        Set the markevery property to subsample the plot when using
        markers.  Eg if ``markevery=5``, every 5-th marker will be
        plotted.  *every* can be

        None
            Every point will be plotted

        an integer N
            Every N-th marker will be plotted starting with marker 0

        A length-2 tuple of integers
            every=(start, N) will start at point start and plot every N-th marker


        ACCEPTS: None | integer | (startind, stride)

        """
        self._markevery = every

    def get_markevery(self):
        'return the markevery setting'
        return self._markevery

    def set_picker(self, p):
        """Sets the event picker details for the line.

        ACCEPTS: float distance in points or callable pick function
        ``fn(artist, event)``
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(
            self.get_xydata()),
                                 ignore=True)
        # correct for marker size, if any
        if self._marker:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect('units',
                                                    self.recache_always)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect('units',
                                                    self.recache_always)

    set_axes.__doc__ = Artist.set_axes.__doc__

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: 2D array (rows are x, y) or two 1D arrays
        """
        if len(args) == 1:
            x, y = args[0]
        else:
            x, y = args

        self.set_xdata(x)
        self.set_ydata(y)

    def recache_always(self):
        self.recache(always=True)

    def recache(self, always=False):
        if always or self._invalidx:
            xconv = self.convert_xunits(self._xorig)
            if ma.isMaskedArray(self._xorig):
                x = ma.asarray(xconv, np.float_)
            else:
                x = np.asarray(xconv, np.float_)
            x = x.ravel()
        else:
            x = self._x
        if always or self._invalidy:
            yconv = self.convert_yunits(self._yorig)
            if ma.isMaskedArray(self._yorig):
                y = ma.asarray(yconv, np.float_)
            else:
                y = np.asarray(yconv, np.float_)
            y = y.ravel()
        else:
            y = self._y

        if len(x) == 1 and len(y) > 1:
            x = x * np.ones(y.shape, np.float_)
        if len(y) == 1 and len(x) > 1:
            y = y * np.ones(x.shape, np.float_)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0]  # just a view
        self._y = self._xy[:, 1]  # just a view

        self._subslice = False
        if (self.axes and len(x) > 100 and self._is_sorted(x)
                and self.axes.name == 'rectilinear'
                and self.axes.get_xscale() == 'linear'
                and self._markevery is None):
            self._subslice = True
        if hasattr(self, '_path'):
            interpolation_steps = self._path._interpolation_steps
        else:
            interpolation_steps = 1
        self._path = Path(self._xy, None, interpolation_steps)
        self._transformed_path = None
        self._invalidx = False
        self._invalidy = False

    def _transform_path(self, subslice=None):
        # Masked arrays are now handled by the Path class itself
        if subslice is not None:
            _path = Path(self._xy[subslice, :])
        else:
            _path = self._path
        self._transformed_path = TransformedPath(_path, self.get_transform())

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a :class:`matplotlib.transforms.Transform` instance
        """
        Artist.set_transform(self, t)
        self._invalidx = True
        self._invalidy = True

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x) < 2: return 1
        return np.alltrue(x[1:] - x[0:-1] >= 0)

    @allow_rasterization
    def draw(self, renderer):
        if self._invalidy or self._invalidx:
            self.recache()
        self.ind_offset = 0  # Needed for contains() method.
        if self._subslice and self.axes:
            # Need to handle monotonically decreasing case also...
            x0, x1 = self.axes.get_xbound()
            i0, = self._x.searchsorted([x0], 'left')
            i1, = self._x.searchsorted([x1], 'right')
            subslice = slice(max(i0 - 1, 0), i1 + 1)
            self.ind_offset = subslice.start
            self._transform_path(subslice)
        if self._transformed_path is None:
            self._transform_path()

        if not self.get_visible(): return

        renderer.open_group('line2d', self.get_gid())
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)
        gc.set_snap(self.get_snap())

        funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
        if funcname != '_draw_nothing':
            tpath, affine = self._transformed_path.get_transformed_path_and_affine(
            )
            if len(tpath.vertices):
                self._lineFunc = getattr(self, funcname)
                funcname = self.drawStyles.get(self._drawstyle, '_draw_lines')
                drawFunc = getattr(self, funcname)
                drawFunc(renderer, gc, tpath, affine.frozen())

        if self._marker:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            rgbFace = self._get_rgb_face()
            rgbFaceAlt = self._get_rgb_face(alt=True)
            edgecolor = self.get_markeredgecolor()
            if is_string_like(edgecolor) and edgecolor.lower() == 'none':
                gc.set_linewidth(0)
                gc.set_foreground(rgbFace)
            else:
                gc.set_foreground(edgecolor)
                gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            marker = self._marker
            tpath, affine = self._transformed_path.get_transformed_points_and_affine(
            )
            if len(tpath.vertices):
                # subsample the markers if markevery is not None
                markevery = self.get_markevery()
                if markevery is not None:
                    if iterable(markevery):
                        startind, stride = markevery
                    else:
                        startind, stride = 0, markevery
                    if tpath.codes is not None:
                        codes = tpath.codes[startind::stride]
                    else:
                        codes = None
                    vertices = tpath.vertices[startind::stride]
                    subsampled = Path(vertices, codes)
                else:
                    subsampled = tpath

                snap = marker.get_snap_threshold()
                if type(snap) == float:
                    snap = renderer.points_to_pixels(self._markersize) >= snap
                gc.set_snap(snap)
                gc.set_joinstyle(marker.get_joinstyle())
                gc.set_capstyle(marker.get_capstyle())
                marker_path = marker.get_path()
                marker_trans = marker.get_transform()
                w = renderer.points_to_pixels(self._markersize)
                if marker.get_marker() != ',':
                    # Don't scale for pixels, and don't stroke them
                    marker_trans = marker_trans.scale(w)
                else:
                    gc.set_linewidth(0)
                renderer.draw_markers(gc, marker_path, marker_trans,
                                      subsampled, affine.frozen(), rgbFace)
                alt_marker_path = marker.get_alt_path()
                if alt_marker_path:
                    alt_marker_trans = marker.get_alt_transform()
                    alt_marker_trans = alt_marker_trans.scale(w)
                    renderer.draw_markers(gc, alt_marker_path,
                                          alt_marker_trans, subsampled,
                                          affine.frozen(), rgbFaceAlt)

            gc.restore()

        gc.restore()
        renderer.close_group('line2d')

    def get_antialiased(self):
        return self._antialiased

    def get_color(self):
        return self._color

    def get_drawstyle(self):
        return self._drawstyle

    def get_linestyle(self):
        return self._linestyle

    def get_linewidth(self):
        return self._linewidth

    def get_marker(self):
        return self._marker.get_marker()

    def get_markeredgecolor(self):
        if (is_string_like(self._markeredgecolor)
                and self._markeredgecolor == 'auto'):
            if self._marker.get_marker() in ('.', ','):
                return self._color
            if self._marker.is_filled():
                return 'k'  # Bad hard-wired default...
            else:
                return self._color
        return self._markeredgecolor

    def get_markeredgewidth(self):
        return self._markeredgewidth

    def _get_markerfacecolor(self, alt=False):
        if alt:
            fc = self._markerfacecoloralt
        else:
            fc = self._markerfacecolor

        if (fc is None or (is_string_like(fc) and fc.lower() == 'none')):
            return fc
        elif (is_string_like(fc) and fc.lower() == 'auto'):
            return self._color
        else:
            return fc

    def get_markerfacecolor(self):
        return self._get_markerfacecolor(alt=False)

    def get_markerfacecoloralt(self):
        return self._get_markerfacecolor(alt=True)

    def get_markersize(self):
        return self._markersize

    def get_data(self, orig=True):
        """
        Return the xdata, ydata.

        If *orig* is *True*, return the original data
        """
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)

    def get_xdata(self, orig=True):
        """
        Return the xdata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._xorig
        if self._invalidx:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        Return the ydata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._yorig
        if self._invalidy:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the :class:`~matplotlib.path.Path` object associated
        with this line.
        """
        if self._invalidy or self._invalidx:
            self.recache()
        return self._path

    def get_xydata(self):
        """
        Return the *xy* data as a Nx2 numpy array.
        """
        if self._invalidy or self._invalidx:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_drawstyle(self, drawstyle):
        """
        Set the drawstyle of the plot

        'default' connects the points with lines. The steps variants
        produce step-plots. 'steps' is equivalent to 'steps-pre' and
        is maintained for backward-compatibility.

        ACCEPTS: [ 'default' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' ]
        """
        self._drawstyle = drawstyle

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line (also accepts drawstyles)


        ================    =================
        linestyle           description
        ================    =================
        ``'-'``             solid
        ``'--'``            dashed
        ``'-.'``            dash_dot
        ``':'``             dotted
        ``'None'``          draw nothing
        ``' '``             draw nothing
        ``''``              draw nothing
        ================    =================

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        .. seealso::

            :meth:`set_drawstyle`
               To set the drawing style (stepping) of the plot.

        ACCEPTS: [ ``'-'`` | ``'--'`` | ``'-.'`` | ``':'`` | ``'None'`` | ``' '`` | ``''`` ]
        and any drawstyle in combination with a linestyle, e.g. ``'steps--'``.
        """

        for ds in self.drawStyleKeys:  # long names are first in the list
            if linestyle.startswith(ds):
                self.set_drawstyle(ds)
                if len(linestyle) > len(ds):
                    linestyle = linestyle[len(ds):]
                else:
                    linestyle = '-'
                break

        if linestyle not in self._lineStyles:
            if linestyle in ls_mapper:
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report('Unrecognized line style %s, %s' %
                               (linestyle, type(linestyle)))
        if linestyle in [' ', '']:
            linestyle = 'None'
        self._linestyle = linestyle

    @docstring.dedent_interpd
    def set_marker(self, marker):
        """
        Set the line marker

        %(MarkerTable)s

        %(MarkerAccepts)s
        """
        self._marker.set_marker(marker)

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        if ec is None:
            ec = 'auto'
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        if ew is None:
            ew = rcParams['lines.markeredgewidth']
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color.

        ACCEPTS: any matplotlib color
        """
        if fc is None:
            fc = 'auto'

        self._markerfacecolor = fc

    def set_markerfacecoloralt(self, fc):
        """
        Set the alternate marker face color.

        ACCEPTS: any matplotlib color
        """
        if fc is None:
            fc = 'auto'

        self._markerfacecoloralt = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: 1D array
        """
        self._xorig = x
        self._invalidx = True

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: 1D array
        """
        self._yorig = y
        self._invalidy = True

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq) == 0:
            self.set_linestyle('-')
        else:
            self.set_linestyle('--')
        self._dashSeq = seq  # TODO: offset ignored for now

    def _draw_lines(self, renderer, gc, path, trans):
        self._lineFunc(renderer, gc, path, trans)

    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())

    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle('solid')
        renderer.draw_path(gc, path, trans)

    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle('dashed')
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)

    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle('dashdot')
        renderer.draw_path(gc, path, trans)

    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle('dotted')
        renderer.draw_path(gc, path, trans)

    def update_from(self, other):
        'copy properties from other to self'
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markerfacecoloralt = other._markerfacecoloralt
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = MarkerStyle(other._marker.get_marker(),
                                   other._marker.get_fillstyle())
        self._drawstyle = other._drawstyle

    def _get_rgb_face(self, alt=False):
        facecolor = self._get_markerfacecolor(alt=alt)
        if is_string_like(facecolor) and facecolor.lower() == 'none':
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        'alias for set_antialiased'
        self.set_antialiased(val)

    def set_c(self, val):
        'alias for set_color'
        self.set_color(val)

    def set_ls(self, val):
        'alias for set_linestyle'
        self.set_linestyle(val)

    def set_lw(self, val):
        'alias for set_linewidth'
        self.set_linewidth(val)

    def set_mec(self, val):
        'alias for set_markeredgecolor'
        self.set_markeredgecolor(val)

    def set_mew(self, val):
        'alias for set_markeredgewidth'
        self.set_markeredgewidth(val)

    def set_mfc(self, val):
        'alias for set_markerfacecolor'
        self.set_markerfacecolor(val)

    def set_mfcalt(self, val):
        'alias for set_markerfacecoloralt'
        self.set_markerfacecoloralt(val)

    def set_ms(self, val):
        'alias for set_markersize'
        self.set_markersize(val)

    def get_aa(self):
        'alias for get_antialiased'
        return self.get_antialiased()

    def get_c(self):
        'alias for get_color'
        return self.get_color()

    def get_ls(self):
        'alias for get_linestyle'
        return self.get_linestyle()

    def get_lw(self):
        'alias for get_linewidth'
        return self.get_linewidth()

    def get_mec(self):
        'alias for get_markeredgecolor'
        return self.get_markeredgecolor()

    def get_mew(self):
        'alias for get_markeredgewidth'
        return self.get_markeredgewidth()

    def get_mfc(self):
        'alias for get_markerfacecolor'
        return self.get_markerfacecolor()

    def get_mfcalt(self, alt=False):
        'alias for get_markerfacecoloralt'
        return self.get_markerfacecoloralt()

    def get_ms(self):
        'alias for get_markersize'
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s, ) +
                             'valid joinstyles are %s' % (self.validJoin, ))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_solid_joinstyle passed "%s";\n' % (s, ) +
                             'valid joinstyles are %s' % (self.validJoin, ))
        self._solidjoinstyle = s

    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles

        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s, ) +
                             'valid capstyles are %s' % (self.validCap, ))

        self._dashcapstyle = s

    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles

        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s, ) +
                             'valid capstyles are %s' % (self.validCap, ))

        self._solidcapstyle = s

    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle

    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle

    def is_dashed(self):
        'return True if line is dashstyle'
        return self._linestyle in ('--', '-.', ':')
Пример #14
0
class Line2D(Artist):
    """
    A line - the line can have both a solid linestyle connecting all
    the vertices, and a marker at each vertex.  Additionally, the
    drawing of the solid line is influenced by the drawstyle, eg one
    can create "stepped" lines in various styles.


    """
    lineStyles = _lineStyles =  { # hidden names deprecated
        '-'          : '_draw_solid',
        '--'         : '_draw_dashed',
        '-.'         : '_draw_dash_dot',
        ':'          : '_draw_dotted',
        'None'       : '_draw_nothing',
        ' '          : '_draw_nothing',
        ''           : '_draw_nothing',
    }

    _drawStyles_l = {
        'default'    : '_draw_lines',
        'steps-mid'  : '_draw_steps_mid',
        'steps-pre'  : '_draw_steps_pre',
        'steps-post' : '_draw_steps_post',
    }

    _drawStyles_s = {
        'steps'      : '_draw_steps_pre',
    }
    drawStyles = {}
    drawStyles.update(_drawStyles_l)
    drawStyles.update(_drawStyles_s)
    # Need a list ordered with long names first:
    drawStyleKeys = _drawStyles_l.keys() + _drawStyles_s.keys()

    # Referenced here to maintain API.  These are defined in
    # MarkerStyle
    markers = MarkerStyle.markers
    filled_markers = MarkerStyle.filled_markers
    fillStyles = MarkerStyle.fillstyles

    zorder = 2
    validCap = ('butt', 'round', 'projecting')
    validJoin =   ('miter', 'round', 'bevel')

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)"%(self._label)
        elif hasattr(self, '_x') and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))"\
                %(self._x[0],self._y[0],self._x[0],self._y[0],self._x[-1],self._y[-1])
        elif hasattr(self, '_x'):
            return "Line2D(%s)"\
                %(",".join(["(%g,%g)"%(x,y) for x,y in zip(self._x,self._y)]))
        else:
            return "Line2D()"

    def __init__(self, xdata, ydata,
                 linewidth       = None, # all Nones default to rc
                 linestyle       = None,
                 color           = None,
                 marker          = None,
                 markersize      = None,
                 markeredgewidth = None,
                 markeredgecolor = None,
                 markerfacecolor = None,
                 markerfacecoloralt = 'none',
                 fillstyle       = 'full',
                 antialiased     = None,
                 dash_capstyle   = None,
                 solid_capstyle  = None,
                 dash_joinstyle  = None,
                 solid_joinstyle = None,
                 pickradius      = 5,
                 drawstyle       = None,
                 markevery       = None,
                 **kwargs
                 ):
        """
        Create a :class:`~matplotlib.lines.Line2D` instance with *x*
        and *y* data in sequences *xdata*, *ydata*.

        The kwargs are :class:`~matplotlib.lines.Line2D` properties:

        %(Line2D)s

        See :meth:`set_linestyle` for a decription of the line styles,
        :meth:`set_marker` for a description of the markers, and
        :meth:`set_drawstyle` for a description of the draw styles.

        """
        Artist.__init__(self)

        #convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError('xdata must be a sequence')
        if not iterable(ydata):
            raise RuntimeError('ydata must be a sequence')

        if linewidth is None   : linewidth=rcParams['lines.linewidth']

        if linestyle is None   : linestyle=rcParams['lines.linestyle']
        if marker is None      : marker=rcParams['lines.marker']
        if color is None       : color=rcParams['lines.color']

        if markersize is None  : markersize=rcParams['lines.markersize']
        if antialiased is None : antialiased=rcParams['lines.antialiased']
        if dash_capstyle is None : dash_capstyle=rcParams['lines.dash_capstyle']
        if dash_joinstyle is None : dash_joinstyle=rcParams['lines.dash_joinstyle']
        if solid_capstyle is None : solid_capstyle=rcParams['lines.solid_capstyle']
        if solid_joinstyle is None : solid_joinstyle=rcParams['lines.solid_joinstyle']

        if drawstyle is None : drawstyle='default'

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)


        self.set_linestyle(linestyle)
        self.set_drawstyle(drawstyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self._marker = MarkerStyle()
        self.set_marker(marker)
        self.set_markevery(markevery)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None


        self.set_markerfacecolor(markerfacecolor)
        self.set_markerfacecoloralt(markerfacecoloralt)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self.set_fillstyle(fillstyle)

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        self.ind_offset = 0
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalidx = True
        self._invalidy = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """
        Test whether the mouse event occurred on the line.  The pick
        radius determines the precision of the location test (usually
        within five points of the value).  Use
        :meth:`~matplotlib.lines.Line2D.get_pickradius` or
        :meth:`~matplotlib.lines.Line2D.set_pickradius` to view or
        modify it.

        Returns *True* if any values are within the radius along with
        ``{'ind': pointlist}``, where *pointlist* is the set of points
        within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains):
            return self._contains(self,mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError("pick radius should be a distance")

        # Make sure we have data to plot
        if self._invalidy or self._invalidx:
            self.recache()
        if len(self._xy)==0: return False,{}

        # Convert points to pixels
        if self._transformed_path is None:
            self._transform_path()
        path, affine = self._transformed_path.get_transformed_path_and_affine()
        path = affine.transform_path(path)
        xy = path.vertices
        xt = xy[:, 0]
        yt = xy[:, 1]

        # Convert pick radius from points to pixels
        if self.figure == None:
            warning.warn('no figure set when check if mouse is on line')
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi/72. * self.pickradius

        # the math involved in checking for containment (here and inside of segment_hits) assumes
        # that it is OK to overflow.  In case the application has set the error flags such that
        # an exception is raised on overflow, we temporarily set the appropriate error flags here
        # and set them back when we are finished. 
        olderrflags = np.seterr(all='ignore')
        try:
            # Check for collision
            if self._linestyle in ['None',None]:
                # If no line, return the nearby point(s)
                d = (xt-mouseevent.x)**2 + (yt-mouseevent.y)**2
                ind, = np.nonzero(np.less_equal(d, pixels**2))
            else:
                # If line, return the nearby segment(s)
                ind = segment_hits(mouseevent.x,mouseevent.y,xt,yt,pixels)
        finally:
            np.seterr(**olderrflags)

        ind += self.ind_offset

        # Debugging message
        if False and self._label != '':
            print("Checking line",self._label,"at",mouseevent.x,mouseevent.y)
            print('xt', xt)
            print('yt', yt)
            #print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print('ind',ind)

        # Return the point(s) within radius
        return len(ind)>0,dict(ind=ind)

    def get_pickradius(self):
        'return the pick radius used for containment tests'
        return self.pickradius

    def set_pickradius(self,d):
        """Sets the pick radius used for containment tests

        ACCEPTS: float distance in points
        """
        self.pickradius = d

    def get_fillstyle(self):
        """
        return the marker fillstyle
        """
        return self._marker.get_fillstyle()

    def set_fillstyle(self, fs):
        """
        Set the marker fill style; 'full' means fill the whole marker.
        'none' means no filling; other options are for half-filled markers.

        ACCEPTS: ['full' | 'left' | 'right' | 'bottom' | 'top' | 'none']
        """
        self._marker.set_fillstyle(fs)

    def set_markevery(self, every):
        """
        Set the markevery property to subsample the plot when using
        markers.  Eg if ``markevery=5``, every 5-th marker will be
        plotted.  *every* can be

        None
            Every point will be plotted

        an integer N
            Every N-th marker will be plotted starting with marker 0

        A length-2 tuple of integers
            every=(start, N) will start at point start and plot every N-th marker


        ACCEPTS: None | integer | (startind, stride)

        """
        self._markevery = every

    def get_markevery(self):
        'return the markevery setting'
        return self._markevery

    def set_picker(self,p):
        """Sets the event picker details for the line.

        ACCEPTS: float distance in points or callable pick function
        ``fn(artist, event)``
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(self.get_xydata()),
                                 ignore=True)
        # correct for marker size, if any
        if self._marker:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect('units', self.recache_always)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect('units', self.recache_always)
    set_axes.__doc__ = Artist.set_axes.__doc__

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: 2D array (rows are x, y) or two 1D arrays
        """
        if len(args)==1:
            x, y = args[0]
        else:
            x, y = args

        self.set_xdata(x)
        self.set_ydata(y)

    def recache_always(self):
        self.recache(always=True)

    def recache(self, always=False):
        if always or self._invalidx:
            xconv = self.convert_xunits(self._xorig)
            if ma.isMaskedArray(self._xorig):
                x = ma.asarray(xconv, np.float_)
            else:
                x = np.asarray(xconv, np.float_)
            x = x.ravel()
        else:
            x = self._x
        if always or self._invalidy:
            yconv = self.convert_yunits(self._yorig)
            if ma.isMaskedArray(self._yorig):
                y = ma.asarray(yconv, np.float_)
            else:
                y = np.asarray(yconv, np.float_)
            y = y.ravel()
        else:
            y = self._y

        if len(x)==1 and len(y)>1:
            x = x * np.ones(y.shape, np.float_)
        if len(y)==1 and len(x)>1:
            y = y * np.ones(x.shape, np.float_)

        if len(x) != len(y):
            raise RuntimeError('xdata and ydata must be the same length')

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0] # just a view
        self._y = self._xy[:, 1] # just a view

        self._subslice = False
        if (self.axes and len(x) > 100 and self._is_sorted(x) and
            self.axes.name == 'rectilinear' and
            self.axes.get_xscale() == 'linear' and
            self._markevery is None):
            self._subslice = True
        if hasattr(self, '_path'):
            interpolation_steps = self._path._interpolation_steps
        else:
            interpolation_steps = 1
        self._path = Path(self._xy, None, interpolation_steps)
        self._transformed_path = None
        self._invalidx = False
        self._invalidy = False

    def _transform_path(self, subslice=None):
        # Masked arrays are now handled by the Path class itself
        if subslice is not None:
            _path = Path(self._xy[subslice,:])
        else:
            _path = self._path
        self._transformed_path = TransformedPath(_path, self.get_transform())


    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a :class:`matplotlib.transforms.Transform` instance
        """
        Artist.set_transform(self, t)
        self._invalidx = True
        self._invalidy = True

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x)<2: return 1
        return np.alltrue(x[1:]-x[0:-1]>=0)

    @allow_rasterization
    def draw(self, renderer):
        if self._invalidy or self._invalidx:
            self.recache()
        self.ind_offset = 0  # Needed for contains() method.
        if self._subslice and self.axes:
            # Need to handle monotonically decreasing case also...
            x0, x1 = self.axes.get_xbound()
            i0, = self._x.searchsorted([x0], 'left')
            i1, = self._x.searchsorted([x1], 'right')
            subslice = slice(max(i0-1, 0), i1+1)
            self.ind_offset = subslice.start
            self._transform_path(subslice)
        if self._transformed_path is None:
            self._transform_path()

        if not self.get_visible(): return

        renderer.open_group('line2d', self.get_gid())
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)
        gc.set_snap(self.get_snap())

        funcname = self._lineStyles.get(self._linestyle, '_draw_nothing')
        if funcname != '_draw_nothing':
            tpath, affine = self._transformed_path.get_transformed_path_and_affine()
            if len(tpath.vertices):
                self._lineFunc = getattr(self, funcname)
                funcname = self.drawStyles.get(self._drawstyle, '_draw_lines')
                drawFunc = getattr(self, funcname)
                drawFunc(renderer, gc, tpath, affine.frozen())

        if self._marker:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            rgbFace = self._get_rgb_face()
            rgbFaceAlt = self._get_rgb_face(alt=True)
            edgecolor = self.get_markeredgecolor()
            if is_string_like(edgecolor) and edgecolor.lower() == 'none':
                gc.set_linewidth(0)
                gc.set_foreground(rgbFace)
            else:
                gc.set_foreground(edgecolor)
                gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            marker = self._marker
            tpath, affine = self._transformed_path.get_transformed_points_and_affine()
            if len(tpath.vertices):
                # subsample the markers if markevery is not None
                markevery = self.get_markevery()
                if markevery is not None:
                    if iterable(markevery):
                        startind, stride = markevery
                    else:
                        startind, stride = 0, markevery
                    if tpath.codes is not None:
                        codes = tpath.codes[startind::stride]
                    else:
                        codes = None
                    vertices = tpath.vertices[startind::stride]
                    subsampled = Path(vertices, codes)
                else:
                    subsampled = tpath

                snap = marker.get_snap_threshold()
                if type(snap) == float:
                    snap = renderer.points_to_pixels(self._markersize) >= snap
                gc.set_snap(snap)
                gc.set_joinstyle(marker.get_joinstyle())
                gc.set_capstyle(marker.get_capstyle())
                marker_path = marker.get_path()
                marker_trans = marker.get_transform()
                w = renderer.points_to_pixels(self._markersize)
                if marker.get_marker() != ',':
                    # Don't scale for pixels, and don't stroke them
                    marker_trans = marker_trans.scale(w)
                else:
                    gc.set_linewidth(0)
                renderer.draw_markers(
                    gc, marker_path, marker_trans, subsampled, affine.frozen(),
                    rgbFace)
                alt_marker_path = marker.get_alt_path()
                if alt_marker_path:
                    alt_marker_trans = marker.get_alt_transform()
                    alt_marker_trans = alt_marker_trans.scale(w)
                    renderer.draw_markers(
                        gc, alt_marker_path, alt_marker_trans, subsampled,
                        affine.frozen(), rgbFaceAlt)

            gc.restore()

        gc.restore()
        renderer.close_group('line2d')

    def get_antialiased(self): return self._antialiased
    def get_color(self): return self._color
    def get_drawstyle(self): return self._drawstyle
    def get_linestyle(self): return self._linestyle

    def get_linewidth(self): return self._linewidth
    def get_marker(self): return self._marker.get_marker()

    def get_markeredgecolor(self):
        mec = self._markeredgecolor
        if (is_string_like(mec) and mec == 'auto'):
            if self._marker.get_marker() in ('.', ','):
                return self._color
            if self._marker.is_filled() and self.get_fillstyle() != 'none':
                return 'k'  # Bad hard-wired default...
            else:
                return self._color
        else:
            return mec

    def get_markeredgewidth(self): return self._markeredgewidth

    def _get_markerfacecolor(self, alt=False):
        if alt:
            fc = self._markerfacecoloralt
        else:
            fc = self._markerfacecolor

        if (is_string_like(fc) and fc.lower() == 'auto'):
            if self.get_fillstyle() == 'none':
                return 'none'
            else:
                return self._color
        else:
            return fc

    def get_markerfacecolor(self):
        return self._get_markerfacecolor(alt=False)

    def get_markerfacecoloralt(self):
        return self._get_markerfacecolor(alt=True)

    def get_markersize(self): return self._markersize

    def get_data(self, orig=True):
        """
        Return the xdata, ydata.

        If *orig* is *True*, return the original data
        """
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)


    def get_xdata(self, orig=True):
        """
        Return the xdata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._xorig
        if self._invalidx:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        Return the ydata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._yorig
        if self._invalidy:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the :class:`~matplotlib.path.Path` object associated
        with this line.
        """
        if self._invalidy or self._invalidx:
            self.recache()
        return self._path

    def get_xydata(self):
        """
        Return the *xy* data as a Nx2 numpy array.
        """
        if self._invalidy or self._invalidx:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_drawstyle(self, drawstyle):
        """
        Set the drawstyle of the plot

        'default' connects the points with lines. The steps variants
        produce step-plots. 'steps' is equivalent to 'steps-pre' and
        is maintained for backward-compatibility.

        ACCEPTS: [ 'default' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' ]
        """
        self._drawstyle = drawstyle

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line (also accepts drawstyles)


        ================    =================
        linestyle           description
        ================    =================
        ``'-'``             solid
        ``'--'``            dashed
        ``'-.'``            dash_dot
        ``':'``             dotted
        ``'None'``          draw nothing
        ``' '``             draw nothing
        ``''``              draw nothing
        ================    =================

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        .. seealso::

            :meth:`set_drawstyle`
               To set the drawing style (stepping) of the plot.

        ACCEPTS: [ ``'-'`` | ``'--'`` | ``'-.'`` | ``':'`` | ``'None'`` | ``' '`` | ``''`` ]
        and any drawstyle in combination with a linestyle, e.g. ``'steps--'``.
        """

        for ds in self.drawStyleKeys:  # long names are first in the list
            if linestyle.startswith(ds):
                self.set_drawstyle(ds)
                if len(linestyle) > len(ds):
                    linestyle = linestyle[len(ds):]
                else:
                    linestyle = '-'
                break

        if linestyle not in self._lineStyles:
            if linestyle in ls_mapper:
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report('Unrecognized line style %s, %s' %
                                            (linestyle, type(linestyle)))
        if linestyle in [' ','']:
            linestyle = 'None'
        self._linestyle = linestyle

    @docstring.dedent_interpd
    def set_marker(self, marker):
        """
        Set the line marker

        %(MarkerTable)s

        %(MarkerAccepts)s
        """
        self._marker.set_marker(marker)

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        if ec is None :
            ec = 'auto'
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        if ew is None :
            ew = rcParams['lines.markeredgewidth']
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color.

        ACCEPTS: any matplotlib color
        """
        if fc is None:
            fc = 'auto'

        self._markerfacecolor = fc

    def set_markerfacecoloralt(self, fc):
        """
        Set the alternate marker face color.

        ACCEPTS: any matplotlib color
        """
        if fc is None:
            fc = 'auto'

        self._markerfacecoloralt = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: 1D array
        """
        self._xorig = x
        self._invalidx = True

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: 1D array
        """
        self._yorig = y
        self._invalidy = True

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq)==0:
            self.set_linestyle('-')
        else:
            self.set_linestyle('--')
        self._dashSeq = seq  # TODO: offset ignored for now


    def _draw_lines(self, renderer, gc, path, trans):
        self._lineFunc(renderer, gc, path, trans)


    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())


    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices)-1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())


    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2*len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        path = path.transformed(self.get_transform())
        self._lineFunc(renderer, gc, path, IdentityTransform())


    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle('solid')
        renderer.draw_path(gc, path, trans)


    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle('dashed')
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)


    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle('dashdot')
        renderer.draw_path(gc, path, trans)


    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle('dotted')
        renderer.draw_path(gc, path, trans)


    def update_from(self, other):
        'copy properties from other to self'
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markerfacecoloralt = other._markerfacecoloralt
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = MarkerStyle(other._marker.get_marker(),
                                   other._marker.get_fillstyle())
        self._drawstyle = other._drawstyle


    def _get_rgb_face(self, alt=False):
        facecolor = self._get_markerfacecolor(alt=alt)
        if is_string_like(facecolor) and facecolor.lower()=='none':
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        'alias for set_antialiased'
        self.set_antialiased(val)

    def set_c(self, val):
        'alias for set_color'
        self.set_color(val)


    def set_ls(self, val):
        'alias for set_linestyle'
        self.set_linestyle(val)


    def set_lw(self, val):
        'alias for set_linewidth'
        self.set_linewidth(val)


    def set_mec(self, val):
        'alias for set_markeredgecolor'
        self.set_markeredgecolor(val)


    def set_mew(self, val):
        'alias for set_markeredgewidth'
        self.set_markeredgewidth(val)


    def set_mfc(self, val):
        'alias for set_markerfacecolor'
        self.set_markerfacecolor(val)

    def set_mfcalt(self, val):
        'alias for set_markerfacecoloralt'
        self.set_markerfacecoloralt(val)

    def set_ms(self, val):
        'alias for set_markersize'
        self.set_markersize(val)

    def get_aa(self):
        'alias for get_antialiased'
        return self.get_antialiased()

    def get_c(self):
        'alias for get_color'
        return self.get_color()


    def get_ls(self):
        'alias for get_linestyle'
        return self.get_linestyle()


    def get_lw(self):
        'alias for get_linewidth'
        return self.get_linewidth()


    def get_mec(self):
        'alias for get_markeredgecolor'
        return self.get_markeredgecolor()


    def get_mew(self):
        'alias for get_markeredgewidth'
        return self.get_markeredgewidth()


    def get_mfc(self):
        'alias for get_markerfacecolor'
        return self.get_markerfacecolor()

    def get_mfcalt(self, alt=False):
        'alias for get_markerfacecoloralt'
        return self.get_markerfacecoloralt()

    def get_ms(self):
        'alias for get_markersize'
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_solid_joinstyle passed "%s";\n' % (s,)
                  + 'valid joinstyles are %s' % (self.validJoin,))
        self._solidjoinstyle = s


    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles

        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._dashcapstyle = s


    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles

        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s,)
                  + 'valid capstyles are %s' % (self.validCap,))

        self._solidcapstyle = s


    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle


    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle


    def is_dashed(self):
        'return True if line is dashstyle'
        return self._linestyle in ('--', '-.', ':')
Пример #15
0
class Artist(object):
    """
    Abstract base class for someone who renders into a FigureCanvas
    """

    aname = 'Artist'
    zorder = 0

    def __init__(self):
        self.figure = None

        self._transform = None
        self._transformSet = False
        self._visible = True
        self._animated = False
        self._alpha = 1.0
        self.clipbox = None
        self._clippath = None
        self._clipon = False
        self._lod = False
        self._label = ''
        self._picker = None
        self._contains = None

        self.eventson = False  # fire events only if eventson
        self._oid = 0  # an observer id
        self._propobservers = {}  # a dict from oids to funcs
        self.axes = None
        self._remove_method = None

    def remove(self):
        """
        Remove the artist from the figure if possible.  The effect will not
        be visible until the figure is redrawn, e.g., with ax.draw_idle().
        Call ax.relim() to update the axes limits if desired.

        Note: relim() will not see collections even if the collection
        was added to axes with autolim=True.

        Note: there is no support for removing the artist's legend entry.
        """

        # There is no method to set the callback.  Instead the parent should set
        # the _remove_method attribute directly.  This would be a protected
        # attribute if Python supported that sort of thing.  The callback
        # has one parameter, which is the child to be removed.
        if self._remove_method != None:
            self._remove_method(self)
        else:
            raise NotImplementedError('cannot remove artist')
        # TODO: the fix for the collections relim problem is to move the
        # limits calculation into the artist itself, including the property
        # of whether or not the artist should affect the limits.  Then there
        # will be no distinction between axes.add_line, axes.add_patch, etc.
        # TODO: add legend support

    def have_units(self):
        'return True if units are set on the x or y axes'
        ax = self.axes
        if ax is None or ax.xaxis is None:
            return False
        return ax.xaxis.have_units() or ax.yaxis.have_units()

    def convert_xunits(self, x):
        """for artists in an axes, if the xaxis as units support,
        convert x using xaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.xaxis is None:
            #print 'artist.convert_xunits no conversion: ax=%s'%ax
            return x
        return ax.xaxis.convert_units(x)

    def convert_yunits(self, y):
        """for artists in an axes, if the yaxis as units support,
        convert y using yaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.yaxis is None: return y
        return ax.yaxis.convert_units(y)

    def set_axes(self, axes):
        """
        set the axes instance the artist resides in, if any

        ACCEPTS: an axes instance
        """
        self.axes = axes

    def get_axes(self):
        'return the axes instance the artist resides in, or None'
        return self.axes

    def add_callback(self, func):
        oid = self._oid
        self._propobservers[oid] = func
        self._oid += 1
        return oid

    def remove_callback(self, oid):
        try:
            del self._propobservers[oid]
        except KeyError:
            pass

    def pchanged(self):
        'fire event when property changed'
        for oid, func in self._propobservers.items():
            func(self)

    def is_transform_set(self):
        'Artist has transform explicity let'
        return self._transformSet

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a matplotlib.transform transformation instance
        """
        self._transform = t
        self._transformSet = True
        self.pchanged()

    def get_transform(self):
        'return the Transformation instance used by this artist'
        if self._transform is None:
            self._transform = IdentityTransform()
        return self._transform

    def hitlist(self, event):
        """List the children of the artist which contain the mouse event"""
        import traceback
        L = []
        try:
            hascursor, info = self.contains(event)
            if hascursor:
                L.append(self)
        except:
            traceback.print_exc()
            print "while checking", self.__class__

        if hasattr(self, 'get_children'):
            for a in self.get_children():
                L.extend(a.hitlist(event))
        return L

    def contains(self, mouseevent):
        """Test whether the artist contains the mouse event.

        Returns the truth value and a dictionary of artist specific details of
        selection, such as which points are contained in the pick radius.  See
        individual artists for details.
        """
        if callable(self._contains): return self._contains(self, mouseevent)
        #raise NotImplementedError,str(self.__class__)+" needs 'contains' method"
        warnings.warn("'%s' needs 'contains' method" % self.__class__.__name__)
        return False, {}

    def set_contains(self, picker):
        """Replace the contains test used by this artist. The new picker should
        be a callable function which determines whether the artist is hit by the
        mouse event:

            hit, props = picker(artist, mouseevent)

        If the mouse event is over the artist, return hit=True and props
        is a dictionary of properties you want returned with the contains test.
        """
        self._contains = picker

    def get_contains(self):
        'return the _contains test used by the artist, or None for default.'
        return self._contains

    def pickable(self):
        'return True if self is pickable'
        return (self.figure is not None and self.figure.canvas is not None
                and self._picker is not None)

    def pick(self, mouseevent):
        """
        pick(mouseevent)

        each child artist will fire a pick event if mouseevent is over
        the artist and the artist has picker set
        """
        # Pick self
        if self.pickable():
            picker = self.get_picker()
            if callable(picker):
                inside, prop = picker(self, mouseevent)
            else:
                inside, prop = self.contains(mouseevent)
            if inside:
                self.figure.canvas.pick_event(mouseevent, self, **prop)

        # Pick children
        if hasattr(self, 'get_children'):
            for a in self.get_children():
                a.pick(mouseevent)

    def set_picker(self, picker):
        """
        set the epsilon for picking used by this artist

        picker can be one of the following:

          None -  picking is disabled for this artist (default)

          boolean - if True then picking will be enabled and the
            artist will fire a pick event if the mouse event is over
            the artist

          float - if picker is a number it is interpreted as an
            epsilon tolerance in points and the the artist will fire
            off an event if it's data is within epsilon of the mouse
            event.  For some artists like lines and patch collections,
            the artist may provide additional data to the pick event
            that is generated, eg the indices of the data within
            epsilon of the pick event

          function - if picker is callable, it is a user supplied
            function which determines whether the artist is hit by the
            mouse event.

              hit, props = picker(artist, mouseevent)

            to determine the hit test.  if the mouse event is over the
            artist, return hit=True and props is a dictionary of
            properties you want added to the PickEvent attributes

        ACCEPTS: [None|float|boolean|callable]
        """
        self._picker = picker

    def get_picker(self):
        'return the Pickeration instance used by this artist'
        return self._picker

    def is_figure_set(self):
        return self.figure is not None

    def get_figure(self):
        'return the figure instance'
        return self.figure

    def set_figure(self, fig):
        """
        Set the figure instance the artist belong to

        ACCEPTS: a matplotlib.figure.Figure instance
        """
        self.figure = fig
        self.pchanged()

    def set_clip_box(self, clipbox):
        """
        Set the artist's clip Bbox

        ACCEPTS: a matplotlib.transform.Bbox instance
        """
        self.clipbox = clipbox
        self._clipon = clipbox is not None or self._clippath is not None
        self.pchanged()

    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          a) a Patch (or subclass) instance

          b) a Path instance, in which cas aoptional transform may
             be provided, which will be applied to the path before using it
             for clipping.

          c) None, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to None.
             
        ACCEPTS: a Path instance and a Transform instance, a Patch
        instance, or None
        """
        from patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(),
                                               path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(path.get_path(),
                                                 path.get_transform())
                success = True

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True

        if not success:
            print type(path), type(transform)
            raise TypeError("Invalid arguments to set_clip_path")

        self._clipon = self.clipbox is not None or self._clippath is not None
        self.pchanged()

    def get_alpha(self):
        """
        Return the alpha value used for blending - not supported on all
        backends
        """
        return self._alpha

    def get_visible(self):
        "return the artist's visiblity"
        return self._visible

    def get_animated(self):
        "return the artist's animated state"
        return self._animated

    def get_clip_on(self):
        'Return whether artist uses clipping'
        return self._clipon and (self.clipbox is not None
                                 or self._clippath is not None)

    def get_clip_box(self):
        'Return artist clipbox'
        return self.clipbox

    def get_clip_path(self):
        'Return artist clip path'
        return self._clippath

    def get_transformed_clip_path_and_affine(self):
        '''
        Return the clip path with the non-affine part of its transformation applied,
        and the remaining affine part of its transformation.
        '''
        if self._clippath is not None:
            return self._clippath.get_transformed_path_and_affine()
        return None, None

    def set_clip_on(self, b):
        """
        Set  whether artist uses clipping

        ACCEPTS: [True | False]
        """
        self._clipon = b
        if not b:
            self.clipbox = None
            self._clippath = None
        self.pchanged()

    def _set_gc_clip(self, gc):
        'set the clip properly for the gc'
        if self.clipbox is not None:
            gc.set_clip_rectangle(self.clipbox)
        gc.set_clip_path(self._clippath)

    def draw(self, renderer, *args, **kwargs):
        'Derived classes drawing method'
        if not self.get_visible(): return

    def set_alpha(self, alpha):
        """
        Set the alpha value used for blending - not supported on
        all backends

        ACCEPTS: float
        """
        self._alpha = alpha
        self.pchanged()

    def set_lod(self, on):
        """
        Set Level of Detail on or off.  If on, the artists may examine
        things like the pixel width of the axes and draw a subset of
        their contents accordingly

        ACCEPTS: [True | False]
        """
        self._lod = on
        self.pchanged()

    def set_visible(self, b):
        """
        set the artist's visiblity

        ACCEPTS: [True | False]
        """
        self._visible = b
        self.pchanged()

    def set_animated(self, b):
        """
        set the artist's animation state

        ACCEPTS: [True | False]
        """
        self._animated = b
        self.pchanged()

    def update(self, props):
        store = self.eventson
        self.eventson = False
        changed = False
        for k, v in props.items():
            func = getattr(self, 'set_' + k, None)
            if func is None or not callable(func):
                raise AttributeError('Unknown property %s' % k)
            func(v)
            changed = True
        self.eventson = store
        if changed: self.pchanged()

    def get_label(self):
        return self._label

    def set_label(self, s):
        """
        Set the line label to s for auto legend

        ACCEPTS: any string
        """
        self._label = s
        self.pchanged()

    def get_zorder(self):
        return self.zorder

    def set_zorder(self, level):
        """
        Set the zorder for the artist

        ACCEPTS: any number
        """
        self.zorder = level
        self.pchanged()

    def update_from(self, other):
        'copy properties from other to self'
        self._transform = other._transform
        self._transformSet = other._transformSet
        self._visible = other._visible
        self._alpha = other._alpha
        self.clipbox = other.clipbox
        self._clipon = other._clipon
        self._clippath = other._clippath
        self._lod = other._lod
        self._label = other._label
        self.pchanged()

    def set(self, **kwargs):
        """
        A tkstyle set command, pass kwargs to set properties
        """
        ret = []
        for k, v in kwargs.items():
            k = k.lower()
            funcName = "set_%s" % k
            func = getattr(self, funcName)
            ret.extend([func(v)])
        return ret
Пример #16
0
class Artist(object):
    """
    Abstract base class for someone who renders into a
    :class:`FigureCanvas`.
    """

    aname = 'Artist'
    zorder = 0
    def __init__(self):
        self.figure = None

        self._transform = None
        self._transformSet = False
        self._visible = True
        self._animated = False
        self._alpha = 1.0
        self.clipbox = None
        self._clippath = None
        self._clipon = True
        self._lod = False
        self._label = ''
        self._picker = None
        self._contains = None
        self._rasterized = None
        self._agg_filter = None

        self.eventson = False  # fire events only if eventson
        self._oid = 0  # an observer id
        self._propobservers = {} # a dict from oids to funcs
        self.axes = None
        self._remove_method = None
        self._url = None
        self._gid = None
        self.x_isdata = True  # False to avoid updating Axes.dataLim with x
        self.y_isdata = True  #                                      with y
        self._snap = None

    def remove(self):
        """
        Remove the artist from the figure if possible.  The effect
        will not be visible until the figure is redrawn, e.g., with
        :meth:`matplotlib.axes.Axes.draw_idle`.  Call
        :meth:`matplotlib.axes.Axes.relim` to update the axes limits
        if desired.

        Note: :meth:`~matplotlib.axes.Axes.relim` will not see
        collections even if the collection was added to axes with
        *autolim* = True.

        Note: there is no support for removing the artist's legend entry.
        """

        # There is no method to set the callback.  Instead the parent should set
        # the _remove_method attribute directly.  This would be a protected
        # attribute if Python supported that sort of thing.  The callback
        # has one parameter, which is the child to be removed.
        if self._remove_method != None:
            self._remove_method(self)
        else:
            raise NotImplementedError('cannot remove artist')
        # TODO: the fix for the collections relim problem is to move the
        # limits calculation into the artist itself, including the property
        # of whether or not the artist should affect the limits.  Then there
        # will be no distinction between axes.add_line, axes.add_patch, etc.
        # TODO: add legend support

    def have_units(self):
        'Return *True* if units are set on the *x* or *y* axes'
        ax = self.axes
        if ax is None or ax.xaxis is None:
            return False
        return ax.xaxis.have_units() or ax.yaxis.have_units()

    def convert_xunits(self, x):
        """For artists in an axes, if the xaxis has units support,
        convert *x* using xaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.xaxis is None:
            #print 'artist.convert_xunits no conversion: ax=%s'%ax
            return x
        return ax.xaxis.convert_units(x)

    def convert_yunits(self, y):
        """For artists in an axes, if the yaxis has units support,
        convert *y* using yaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.yaxis is None: return y
        return ax.yaxis.convert_units(y)

    def set_axes(self, axes):
        """
        Set the :class:`~matplotlib.axes.Axes` instance in which the
        artist resides, if any.

        ACCEPTS: an :class:`~matplotlib.axes.Axes` instance
        """
        self.axes = axes

    def get_axes(self):
        """
        Return the :class:`~matplotlib.axes.Axes` instance the artist
        resides in, or *None*
        """
        return self.axes

    def add_callback(self, func):
        """
        Adds a callback function that will be called whenever one of
        the :class:`Artist`'s properties changes.

        Returns an *id* that is useful for removing the callback with
        :meth:`remove_callback` later.
        """
        oid = self._oid
        self._propobservers[oid] = func
        self._oid += 1
        return oid

    def remove_callback(self, oid):
        """
        Remove a callback based on its *id*.

        .. seealso::

            :meth:`add_callback`
               For adding callbacks

        """
        try: del self._propobservers[oid]
        except KeyError: pass

    def pchanged(self):
        """
        Fire an event when property changed, calling all of the
        registered callbacks.
        """
        for oid, func in self._propobservers.items():
            func(self)

    def is_transform_set(self):
        """
        Returns *True* if :class:`Artist` has a transform explicitly
        set.
        """
        return self._transformSet

    def set_transform(self, t):
        """
        Set the :class:`~matplotlib.transforms.Transform` instance
        used by this artist.

        ACCEPTS: :class:`~matplotlib.transforms.Transform` instance
        """
        self._transform = t
        self._transformSet = True
        self.pchanged()

    def get_transform(self):
        """
        Return the :class:`~matplotlib.transforms.Transform`
        instance used by this artist.
        """
        if self._transform is None:
            self._transform = IdentityTransform()
        return self._transform

    def hitlist(self, event):
        """
        List the children of the artist which contain the mouse event *event*.
        """
        import traceback
        L = []
        try:
            hascursor,info = self.contains(event)
            if hascursor:
                L.append(self)
        except:
            traceback.print_exc()
            print "while checking",self.__class__


        for a in self.get_children():
            L.extend(a.hitlist(event))
        return L

    def get_children(self):
        """
        Return a list of the child :class:`Artist`s this
        :class:`Artist` contains.
        """
        return []

    def contains(self, mouseevent):
        """Test whether the artist contains the mouse event.

        Returns the truth value and a dictionary of artist specific details of
        selection, such as which points are contained in the pick radius.  See
        individual artists for details.
        """
        if callable(self._contains): return self._contains(self,mouseevent)
        #raise NotImplementedError,str(self.__class__)+" needs 'contains' method"
        warnings.warn("'%s' needs 'contains' method" % self.__class__.__name__)
        return False,{}

    def set_contains(self,picker):
        """
        Replace the contains test used by this artist. The new picker
        should be a callable function which determines whether the
        artist is hit by the mouse event::

            hit, props = picker(artist, mouseevent)

        If the mouse event is over the artist, return *hit* = *True*
        and *props* is a dictionary of properties you want returned
        with the contains test.

        ACCEPTS: a callable function
        """
        self._contains = picker

    def get_contains(self):
        """
        Return the _contains test used by the artist, or *None* for default.
        """
        return self._contains

    def pickable(self):
        'Return *True* if :class:`Artist` is pickable.'
        return (self.figure is not None and
                self.figure.canvas is not None and
                self._picker is not None)

    def pick(self, mouseevent):
        """
        call signature::

          pick(mouseevent)

        each child artist will fire a pick event if *mouseevent* is over
        the artist and the artist has picker set
        """
        # Pick self
        if self.pickable():
            picker = self.get_picker()
            if callable(picker):
                inside,prop = picker(self,mouseevent)
            else:
                inside,prop = self.contains(mouseevent)
            if inside:
                self.figure.canvas.pick_event(mouseevent, self, **prop)

        # Pick children
        for a in self.get_children():
            # make sure the event happened in the same axes
            ax = getattr(a, 'axes', None)
            if mouseevent.inaxes==ax:
                a.pick(mouseevent)

    def set_picker(self, picker):
        """
        Set the epsilon for picking used by this artist

        *picker* can be one of the following:

          * *None*: picking is disabled for this artist (default)

          * A boolean: if *True* then picking will be enabled and the
            artist will fire a pick event if the mouse event is over
            the artist

          * A float: if picker is a number it is interpreted as an
            epsilon tolerance in points and the artist will fire
            off an event if it's data is within epsilon of the mouse
            event.  For some artists like lines and patch collections,
            the artist may provide additional data to the pick event
            that is generated, e.g. the indices of the data within
            epsilon of the pick event

          * A function: if picker is callable, it is a user supplied
            function which determines whether the artist is hit by the
            mouse event::

              hit, props = picker(artist, mouseevent)

            to determine the hit test.  if the mouse event is over the
            artist, return *hit=True* and props is a dictionary of
            properties you want added to the PickEvent attributes.

        ACCEPTS: [None|float|boolean|callable]
        """
        self._picker = picker

    def get_picker(self):
        'Return the picker object used by this artist'
        return self._picker

    def is_figure_set(self):
        """
        Returns True if the artist is assigned to a
        :class:`~matplotlib.figure.Figure`.
        """
        return self.figure is not None

    def get_url(self):
        """
        Returns the url
        """
        return self._url

    def set_url(self, url):
        """
        Sets the url for the artist

        ACCEPTS: a url string
        """
        self._url = url


    def get_gid(self):
        """
        Returns the group id
        """
        return self._gid

    def set_gid(self, gid):
        """
        Sets the (group) id for the artist

        ACCEPTS: an id string
        """
        self._gid = gid

    def get_snap(self):
        """
        Returns the snap setting which may be:

          * True: snap vertices to the nearest pixel center

          * False: leave vertices as-is

          * None: (auto) If the path contains only rectilinear line
            segments, round to the nearest pixel center

        Only supported by the Agg backends.
        """
        return self._snap

    def set_snap(self, snap):
        """
        Sets the snap setting which may be:

          * True: snap vertices to the nearest pixel center

          * False: leave vertices as-is

          * None: (auto) If the path contains only rectilinear line
            segments, round to the nearest pixel center

        Only supported by the Agg backends.
        """
        self._snap = snap

    def get_figure(self):
        """
        Return the :class:`~matplotlib.figure.Figure` instance the
        artist belongs to.
        """
        return self.figure

    def set_figure(self, fig):
        """
        Set the :class:`~matplotlib.figure.Figure` instance the artist
        belongs to.

        ACCEPTS: a :class:`matplotlib.figure.Figure` instance
        """
        self.figure = fig
        self.pchanged()

    def set_clip_box(self, clipbox):
        """
        Set the artist's clip :class:`~matplotlib.transforms.Bbox`.

        ACCEPTS: a :class:`matplotlib.transforms.Bbox` instance
        """
        self.clipbox = clipbox
        self.pchanged()

    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          * a :class:`~matplotlib.patches.Patch` (or subclass) instance

          * a :class:`~matplotlib.path.Path` instance, in which case
             an optional :class:`~matplotlib.transforms.Transform`
             instance may be provided, which will be applied to the
             path before using it for clipping.

          * *None*, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to *None*.

        ACCEPTS: [ (:class:`~matplotlib.path.Path`,
        :class:`~matplotlib.transforms.Transform`) |
        :class:`~matplotlib.patches.Patch` | None ]
        """
        from patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(), path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(
                    path.get_path(),
                    path.get_transform())
                success = True

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True
        elif isinstance(path, TransformedPath):
            self._clippath = path
            success = True

        if not success:
            print type(path), type(transform)
            raise TypeError("Invalid arguments to set_clip_path")

        self.pchanged()

    def get_alpha(self):
        """
        Return the alpha value used for blending - not supported on all
        backends
        """
        return self._alpha

    def get_visible(self):
        "Return the artist's visiblity"
        return self._visible

    def get_animated(self):
        "Return the artist's animated state"
        return self._animated

    def get_clip_on(self):
        'Return whether artist uses clipping'
        return self._clipon

    def get_clip_box(self):
        'Return artist clipbox'
        return self.clipbox

    def get_clip_path(self):
        'Return artist clip path'
        return self._clippath

    def get_transformed_clip_path_and_affine(self):
        '''
        Return the clip path with the non-affine part of its
        transformation applied, and the remaining affine part of its
        transformation.
        '''
        if self._clippath is not None:
            return self._clippath.get_transformed_path_and_affine()
        return None, None

    def set_clip_on(self, b):
        """
        Set whether artist uses clipping.

        ACCEPTS: [True | False]
        """
        self._clipon = b
        self.pchanged()

    def _set_gc_clip(self, gc):
        'Set the clip properly for the gc'
        if self._clipon:
            if self.clipbox is not None:
                gc.set_clip_rectangle(self.clipbox)
            gc.set_clip_path(self._clippath)
        else:
            gc.set_clip_rectangle(None)
            gc.set_clip_path(None)

    def get_rasterized(self):
        "return True if the artist is to be rasterized"
        return self._rasterized

    def set_rasterized(self, rasterized):
        """
        Force rasterized (bitmap) drawing in vector backend output.

        Defaults to None, which implies the backend's default behavior

        ACCEPTS: [True | False | None]
        """
        if rasterized and not hasattr(self.draw, "_supports_rasterization"):
            warnings.warn("Rasterization of '%s' will be ignored" % self)

        self._rasterized = rasterized

    def get_agg_filter(self):
        "return filter function to be used for agg filter"
        return self._agg_filter

    def set_agg_filter(self, filter_func):
        """
        set agg_filter fuction.

        """
        self._agg_filter = filter_func

    def draw(self, renderer, *args, **kwargs):
        'Derived classes drawing method'
        if not self.get_visible(): return

    def set_alpha(self, alpha):
        """
        Set the alpha value used for blending - not supported on
        all backends.

        ACCEPTS: float (0.0 transparent through 1.0 opaque)
        """
        self._alpha = alpha
        self.pchanged()

    def set_lod(self, on):
        """
        Set Level of Detail on or off.  If on, the artists may examine
        things like the pixel width of the axes and draw a subset of
        their contents accordingly

        ACCEPTS: [True | False]
        """
        self._lod = on
        self.pchanged()

    def set_visible(self, b):
        """
        Set the artist's visiblity.

        ACCEPTS: [True | False]
        """
        self._visible = b
        self.pchanged()


    def set_animated(self, b):
        """
        Set the artist's animation state.

        ACCEPTS: [True | False]
        """
        self._animated = b
        self.pchanged()

    def update(self, props):
        """
        Update the properties of this :class:`Artist` from the
        dictionary *prop*.
        """
        store = self.eventson
        self.eventson = False
        changed = False
        for k,v in props.items():
            func = getattr(self, 'set_'+k, None)
            if func is None or not callable(func):
                raise AttributeError('Unknown property %s'%k)
            func(v)
            changed = True
        self.eventson = store
        if changed: self.pchanged()


    def get_label(self):
        """
        Get the label used for this artist in the legend.
        """
        return self._label

    def set_label(self, s):
        """
        Set the label to *s* for auto legend.

        ACCEPTS: any string
        """
        self._label = s
        self.pchanged()



    def get_zorder(self):
        """
        Return the :class:`Artist`'s zorder.
        """
        return self.zorder

    def set_zorder(self, level):
        """
        Set the zorder for the artist.  Artists with lower zorder
        values are drawn first.

        ACCEPTS: any number
        """
        self.zorder = level
        self.pchanged()

    def update_from(self, other):
        'Copy properties from *other* to *self*.'
        self._transform = other._transform
        self._transformSet = other._transformSet
        self._visible = other._visible
        self._alpha = other._alpha
        self.clipbox = other.clipbox
        self._clipon = other._clipon
        self._clippath = other._clippath
        self._lod = other._lod
        self._label = other._label
        self.pchanged()


    def properties(self):
        """
        return a dictionary mapping property name -> value for all Artist props
        """
        return ArtistInspector(self).properties()

    def set(self, **kwargs):
        """
        A tkstyle set command, pass *kwargs* to set properties
        """
        ret = []
        for k,v in kwargs.items():
            k = k.lower()
            funcName = "set_%s"%k
            func = getattr(self,funcName)
            ret.extend( [func(v)] )
        return ret

    def findobj(self, match=None):
        """
        pyplot signature:
          findobj(o=gcf(), match=None)

        Recursively find all :class:matplotlib.artist.Artist instances
        contained in self.

        *match* can be

          - None: return all objects contained in artist (including artist)

          - function with signature ``boolean = match(artist)`` used to filter matches

          - class instance: eg Line2D.  Only return artists of class type

        .. plot:: mpl_examples/pylab_examples/findobj_demo.py
        """

        if match is None: # always return True
            def matchfunc(x): return True
        elif cbook.issubclass_safe(match, Artist):
            def matchfunc(x):
                return isinstance(x, match)
        elif callable(match):
            matchfunc = match
        else:
            raise ValueError('match must be None, an matplotlib.artist.Artist subclass, or a callable')


        artists = []

        for c in self.get_children():
            if matchfunc(c):
                artists.append(c)
            artists.extend([thisc for thisc in c.findobj(matchfunc) if matchfunc(thisc)])

        if matchfunc(self):
            artists.append(self)
        return artists
Пример #17
0
class Artist(object):
    """
    Abstract base class for someone who renders into a
    :class:`FigureCanvas`.
    """

    aname = 'Artist'
    zorder = 0
    def __init__(self):
        self.figure = None

        self._transform = None
        self._transformSet = False
        self._visible = True
        self._animated = False
        self._alpha = 1.0
        self.clipbox = None
        self._clippath = None
        self._clipon = False
        self._lod = False
        self._label = ''
        self._picker = None
        self._contains = None

        self.eventson = False  # fire events only if eventson
        self._oid = 0  # an observer id
        self._propobservers = {} # a dict from oids to funcs
        self.axes = None
        self._remove_method = None

    def remove(self):
        """
        Remove the artist from the figure if possible.  The effect
        will not be visible until the figure is redrawn, e.g., with
        :meth:`matplotlib.axes.Axes.draw_idle`.  Call
        :meth:`matplotlib.axes.Axes.relim` to update the axes limits
        if desired.

        Note: :meth:`~matplotlib.axes.Axes.relim` will not see
        collections even if the collection was added to axes with
        *autolim* = True.

        Note: there is no support for removing the artist's legend entry.
        """

        # There is no method to set the callback.  Instead the parent should set
        # the _remove_method attribute directly.  This would be a protected
        # attribute if Python supported that sort of thing.  The callback
        # has one parameter, which is the child to be removed.
        if self._remove_method != None:
            self._remove_method(self)
        else:
            raise NotImplementedError('cannot remove artist')
        # TODO: the fix for the collections relim problem is to move the
        # limits calculation into the artist itself, including the property
        # of whether or not the artist should affect the limits.  Then there
        # will be no distinction between axes.add_line, axes.add_patch, etc.
        # TODO: add legend support

    def have_units(self):
        'return *True* if units are set on the x or y axes'
        ax = self.axes
        if ax is None or ax.xaxis is None:
            return False
        return ax.xaxis.have_units() or ax.yaxis.have_units()

    def convert_xunits(self, x):
        """for artists in an axes, if the xaxis as units support,
        convert *x* using xaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.xaxis is None:
            #print 'artist.convert_xunits no conversion: ax=%s'%ax
            return x
        return ax.xaxis.convert_units(x)

    def convert_yunits(self, y):
        """for artists in an axes, if the yaxis as units support,
        convert *y* using yaxis unit type
        """
        ax = getattr(self, 'axes', None)
        if ax is None or ax.yaxis is None: return y
        return ax.yaxis.convert_units(y)

    def set_axes(self, axes):
        """
        set the axes instance in which the artist resides, if any

        ACCEPTS: an axes instance
        """
        self.axes = axes

    def get_axes(self):
        'return the axes instance the artist resides in, or *None*'
        return self.axes

    def add_callback(self, func):
        oid = self._oid
        self._propobservers[oid] = func
        self._oid += 1
        return oid

    def remove_callback(self, oid):
        try: del self._propobservers[oid]
        except KeyError: pass

    def pchanged(self):
        'fire event when property changed'
        for oid, func in self._propobservers.items():
            func(self)

    def is_transform_set(self):
        'Artist has transform explicity let'
        return self._transformSet

    def set_transform(self, t):
        """
        Set the :class:`~matplotlib.transforms.Transform` instance
        used by this artist.
        """
        self._transform = t
        self._transformSet = True
        self.pchanged()

    def get_transform(self):
        """
        Return the :class:`~matplotlib.transforms.Transform`
        instance used by this artist.
        """
        if self._transform is None:
            self._transform = IdentityTransform()
        return self._transform

    def hitlist(self,event):
        """List the children of the artist which contain the mouse event"""
        import traceback
        L = []
        try:
            hascursor,info = self.contains(event)
            if hascursor:
                L.append(self)
        except:
            traceback.print_exc()
            print "while checking",self.__class__

        if hasattr(self,'get_children'):
            for a in self.get_children(): L.extend(a.hitlist(event))
        return L

    def contains(self, mouseevent):
        """Test whether the artist contains the mouse event.

        Returns the truth value and a dictionary of artist specific details of
        selection, such as which points are contained in the pick radius.  See
        individual artists for details.
        """
        if callable(self._contains): return self._contains(self,mouseevent)
        #raise NotImplementedError,str(self.__class__)+" needs 'contains' method"
        warnings.warn("'%s' needs 'contains' method" % self.__class__.__name__)
        return False,{}

    def set_contains(self,picker):
        """Replace the contains test used by this artist. The new picker should
        be a callable function which determines whether the artist is hit by the
        mouse event::

            hit, props = picker(artist, mouseevent)

        If the mouse event is over the artist, return *hit=True* and *props*
        is a dictionary of properties you want returned with the contains test.
        """
        self._contains = picker

    def get_contains(self):
        'return the _contains test used by the artist, or *None* for default.'
        return self._contains

    def pickable(self):
        'return *True* if self is pickable'
        return (self.figure is not None and
                self.figure.canvas is not None and
                self._picker is not None)

    def pick(self, mouseevent):
        """
        call signature::

          pick(mouseevent)

        each child artist will fire a pick event if *mouseevent* is over
        the artist and the artist has picker set
        """
        # Pick self
        if self.pickable():
            picker = self.get_picker()
            if callable(picker):
                inside,prop = picker(self,mouseevent)
            else:
                inside,prop = self.contains(mouseevent)
            if inside:
                self.figure.canvas.pick_event(mouseevent, self, **prop)

        # Pick children
        if hasattr(self,'get_children'):
            for a in self.get_children(): a.pick(mouseevent)

    def set_picker(self, picker):
        """
        set the epsilon for picking used by this artist

        *picker* can be one of the following:

          * *None*: picking is disabled for this artist (default)

          * A boolean: if *True* then picking will be enabled and the
            artist will fire a pick event if the mouse event is over
            the artist

          * A float: if picker is a number it is interpreted as an
            epsilon tolerance in points and the artist will fire
            off an event if it's data is within epsilon of the mouse
            event.  For some artists like lines and patch collections,
            the artist may provide additional data to the pick event
            that is generated, e.g. the indices of the data within
            epsilon of the pick event

          * A function: if picker is callable, it is a user supplied
            function which determines whether the artist is hit by the
            mouse event::

              hit, props = picker(artist, mouseevent)

            to determine the hit test.  if the mouse event is over the
            artist, return *hit=True* and props is a dictionary of
            properties you want added to the PickEvent attributes.

        ACCEPTS: [None|float|boolean|callable]
        """
        self._picker = picker

    def get_picker(self):
        'return the Pickeration instance used by this artist'
        return self._picker

    def is_figure_set(self):
        return self.figure is not None

    def get_figure(self):
        """
        Return the :class:`~matplotlib.figure.Figure` instance the
        artist belongs to.
        """
        return self.figure

    def set_figure(self, fig):
        """
        Set the :class:`~matplotlib.figure.Figure` instance the artist
        belongs to.

        ACCEPTS: a :class:`matplotlib.figure.Figure` instance
        """
        self.figure = fig
        self.pchanged()

    def set_clip_box(self, clipbox):
        """
        Set the artist's clip Bbox

        ACCEPTS: a :class:`matplotlib.transform.Bbox` instance
        """
        self.clipbox = clipbox
        self._clipon = clipbox is not None or self._clippath is not None
        self.pchanged()

    def set_clip_path(self, path, transform=None):
        """
        Set the artist's clip path, which may be:

          * a :class:`~matplotlib.patches.Patch` (or subclass) instance

          * a :class:`~matplotlib.path.Path` instance, in which case
             an optional :class:`~matplotlib.transforms.Transform`
             instance may be provided, which will be applied to the
             path before using it for clipping.

          * *None*, to remove the clipping path

        For efficiency, if the path happens to be an axis-aligned
        rectangle, this method will set the clipping box to the
        corresponding rectangle and set the clipping path to *None*.

        ACCEPTS: a :class:`~matplotlib.path.Path` instance and a
        :class:`~matplotlib.transforms.Transform` instance, a
        :class:`~matplotlib.patches.Patch` instance, or *None*.
        """
        from patches import Patch, Rectangle

        success = False
        if transform is None:
            if isinstance(path, Rectangle):
                self.clipbox = TransformedBbox(Bbox.unit(), path.get_transform())
                self._clippath = None
                success = True
            elif isinstance(path, Patch):
                self._clippath = TransformedPath(
                    path.get_path(),
                    path.get_transform())
                success = True

        if path is None:
            self._clippath = None
            success = True
        elif isinstance(path, Path):
            self._clippath = TransformedPath(path, transform)
            success = True

        if not success:
            print type(path), type(transform)
            raise TypeError("Invalid arguments to set_clip_path")

        self._clipon = self.clipbox is not None or self._clippath is not None
        self.pchanged()

    def get_alpha(self):
        """
        Return the alpha value used for blending - not supported on all
        backends
        """
        return self._alpha

    def get_visible(self):
        "return the artist's visiblity"
        return self._visible

    def get_animated(self):
        "return the artist's animated state"
        return self._animated

    def get_clip_on(self):
        'Return whether artist uses clipping'
        return self._clipon and (self.clipbox is not None or self._clippath is not None)

    def get_clip_box(self):
        'Return artist clipbox'
        return self.clipbox

    def get_clip_path(self):
        'Return artist clip path'
        return self._clippath

    def get_transformed_clip_path_and_affine(self):
        '''
        Return the clip path with the non-affine part of its
        transformation applied, and the remaining affine part of its
        transformation.
        '''
        if self._clippath is not None:
            return self._clippath.get_transformed_path_and_affine()
        return None, None

    def set_clip_on(self, b):
        """
        Set  whether artist uses clipping

        ACCEPTS: [True | False]
        """
        self._clipon = b
        if not b:
            self.clipbox = None
            self._clippath = None
        self.pchanged()

    def _set_gc_clip(self, gc):
        'set the clip properly for the gc'
        if self.clipbox is not None:
            gc.set_clip_rectangle(self.clipbox)
        gc.set_clip_path(self._clippath)

    def draw(self, renderer, *args, **kwargs):
        'Derived classes drawing method'
        if not self.get_visible(): return

    def set_alpha(self, alpha):
        """
        Set the alpha value used for blending - not supported on
        all backends

        ACCEPTS: float
        """
        self._alpha = alpha
        self.pchanged()

    def set_lod(self, on):
        """
        Set Level of Detail on or off.  If on, the artists may examine
        things like the pixel width of the axes and draw a subset of
        their contents accordingly

        ACCEPTS: [True | False]
        """
        self._lod = on
        self.pchanged()

    def set_visible(self, b):
        """
        set the artist's visiblity

        ACCEPTS: [True | False]
        """
        self._visible = b
        self.pchanged()


    def set_animated(self, b):
        """
        set the artist's animation state

        ACCEPTS: [True | False]
        """
        self._animated = b
        self.pchanged()

    def update(self, props):
        store = self.eventson
        self.eventson = False
        changed = False
        for k,v in props.items():
            func = getattr(self, 'set_'+k, None)
            if func is None or not callable(func):
                raise AttributeError('Unknown property %s'%k)
            func(v)
            changed = True
        self.eventson = store
        if changed: self.pchanged()


    def get_label(self):
        return self._label

    def set_label(self, s):
        """
        Set the line label to *s* for auto legend

        ACCEPTS: any string
        """
        self._label = s
        self.pchanged()



    def get_zorder(self): return self.zorder

    def set_zorder(self, level):
        """
        Set the zorder for the artist

        ACCEPTS: any number
        """
        self.zorder = level
        self.pchanged()

    def update_from(self, other):
        'Copy properties from *other* to *self*.'
        self._transform = other._transform
        self._transformSet = other._transformSet
        self._visible = other._visible
        self._alpha = other._alpha
        self.clipbox = other.clipbox
        self._clipon = other._clipon
        self._clippath = other._clippath
        self._lod = other._lod
        self._label = other._label
        self.pchanged()


    def set(self, **kwargs):
        """
        A tkstyle set command, pass *kwargs* to set properties
        """
        ret = []
        for k,v in kwargs.items():
            k = k.lower()
            funcName = "set_%s"%k
            func = getattr(self,funcName)
            ret.extend( [func(v)] )
        return ret
Пример #18
0
class Line2D(Artist):
    lineStyles = _lineStyles = {  # hidden names deprecated
        "-": "_draw_solid",
        "--": "_draw_dashed",
        "-.": "_draw_dash_dot",
        ":": "_draw_dotted",
        "steps": "_draw_steps_pre",
        "steps-mid": "_draw_steps_mid",
        "steps-pre": "_draw_steps_pre",
        "steps-post": "_draw_steps_post",
        "None": "_draw_nothing",
        " ": "_draw_nothing",
        "": "_draw_nothing",
    }

    markers = _markers = {  # hidden names deprecated
        ".": "_draw_point",
        ",": "_draw_pixel",
        "o": "_draw_circle",
        "v": "_draw_triangle_down",
        "^": "_draw_triangle_up",
        "<": "_draw_triangle_left",
        ">": "_draw_triangle_right",
        "1": "_draw_tri_down",
        "2": "_draw_tri_up",
        "3": "_draw_tri_left",
        "4": "_draw_tri_right",
        "s": "_draw_square",
        "p": "_draw_pentagon",
        "h": "_draw_hexagon1",
        "H": "_draw_hexagon2",
        "+": "_draw_plus",
        "x": "_draw_x",
        "D": "_draw_diamond",
        "d": "_draw_thin_diamond",
        "|": "_draw_vline",
        "_": "_draw_hline",
        TICKLEFT: "_draw_tickleft",
        TICKRIGHT: "_draw_tickright",
        TICKUP: "_draw_tickup",
        TICKDOWN: "_draw_tickdown",
        CARETLEFT: "_draw_caretleft",
        CARETRIGHT: "_draw_caretright",
        CARETUP: "_draw_caretup",
        CARETDOWN: "_draw_caretdown",
        "None": "_draw_nothing",
        " ": "_draw_nothing",
        "": "_draw_nothing",
    }

    filled_markers = ("o", "^", "v", "<", ">", "s", "d", "D", "h", "H", "p")

    zorder = 2
    validCap = ("butt", "round", "projecting")
    validJoin = ("miter", "round", "bevel")

    def __str__(self):
        if self._label != "":
            return "Line2D(%s)" % (self._label)
        elif hasattr(self, "_x") and len(self._x) > 3:
            return "Line2D((%g,%g),(%g,%g),...,(%g,%g))" % (
                self._x[0],
                self._y[0],
                self._x[0],
                self._y[0],
                self._x[-1],
                self._y[-1],
            )
        elif hasattr(self, "_x"):
            return "Line2D(%s)" % (",".join(["(%g,%g)" % (x, y) for x, y in zip(self._x, self._y)]))
        else:
            return "Line2D()"

    def __init__(
        self,
        xdata,
        ydata,
        linewidth=None,  # all Nones default to rc
        linestyle=None,
        color=None,
        marker=None,
        markersize=None,
        markeredgewidth=None,
        markeredgecolor=None,
        markerfacecolor=None,
        antialiased=None,
        dash_capstyle=None,
        solid_capstyle=None,
        dash_joinstyle=None,
        solid_joinstyle=None,
        pickradius=5,
        **kwargs
    ):
        """
        Create a :class:`~matplotlib.lines.Line2D` instance with *x*
        and *y* data in sequences *xdata*, *ydata*.

        The kwargs are Line2D properties:
        %(Line2D)s
        """
        Artist.__init__(self)

        # convert sequences to numpy arrays
        if not iterable(xdata):
            raise RuntimeError("xdata must be a sequence")
        if not iterable(ydata):
            raise RuntimeError("ydata must be a sequence")

        if linewidth is None:
            linewidth = rcParams["lines.linewidth"]

        if linestyle is None:
            linestyle = rcParams["lines.linestyle"]
        if marker is None:
            marker = rcParams["lines.marker"]
        if color is None:
            color = rcParams["lines.color"]

        if markersize is None:
            markersize = rcParams["lines.markersize"]
        if antialiased is None:
            antialiased = rcParams["lines.antialiased"]
        if dash_capstyle is None:
            dash_capstyle = rcParams["lines.dash_capstyle"]
        if dash_joinstyle is None:
            dash_joinstyle = rcParams["lines.dash_joinstyle"]
        if solid_capstyle is None:
            solid_capstyle = rcParams["lines.solid_capstyle"]
        if solid_joinstyle is None:
            solid_joinstyle = rcParams["lines.solid_joinstyle"]

        self.set_dash_capstyle(dash_capstyle)
        self.set_dash_joinstyle(dash_joinstyle)
        self.set_solid_capstyle(solid_capstyle)
        self.set_solid_joinstyle(solid_joinstyle)

        self.set_linestyle(linestyle)
        self.set_linewidth(linewidth)
        self.set_color(color)
        self.set_marker(marker)
        self.set_antialiased(antialiased)
        self.set_markersize(markersize)
        self._dashSeq = None

        self.set_markerfacecolor(markerfacecolor)
        self.set_markeredgecolor(markeredgecolor)
        self.set_markeredgewidth(markeredgewidth)
        self._point_size_reduction = 0.5

        self.verticalOffset = None

        # update kwargs before updating data to give the caller a
        # chance to init axes (and hence unit support)
        self.update(kwargs)
        self.pickradius = pickradius
        if is_numlike(self._picker):
            self.pickradius = self._picker

        self._xorig = np.asarray([])
        self._yorig = np.asarray([])
        self._invalid = True
        self.set_data(xdata, ydata)

    def contains(self, mouseevent):
        """
        Test whether the mouse event occurred on the line.  The pick
        radius determines the precision of the location test (usually
        within five points of the value).  Use
        :meth:`~matplotlib.lines.Line2D.get_pickradius`/:meth:`~matplotlib.lines.Line2D.set_pickradius`
        to view or modify it.

        Returns *True* if any values are within the radius along with
        ``{'ind': pointlist}``, where *pointlist* is the set of points
        within the radius.

        TODO: sort returned indices by distance
        """
        if callable(self._contains):
            return self._contains(self, mouseevent)

        if not is_numlike(self.pickradius):
            raise ValueError, "pick radius should be a distance"

        # Make sure we have data to plot
        if self._invalid:
            self.recache()
        if len(self._xy) == 0:
            return False, {}

        # Convert points to pixels
        path, affine = self._transformed_path.get_transformed_path_and_affine()
        path = affine.transform_path(path)
        xy = path.vertices
        xt = xy[:, 0]
        yt = xy[:, 1]

        # Convert pick radius from points to pixels
        if self.figure == None:
            warning.warn("no figure set when check if mouse is on line")
            pixels = self.pickradius
        else:
            pixels = self.figure.dpi / 72.0 * self.pickradius

        # Check for collision
        if self._linestyle in ["None", None]:
            # If no line, return the nearby point(s)
            d = (xt - mouseevent.x) ** 2 + (yt - mouseevent.y) ** 2
            ind, = np.nonzero(np.less_equal(d, pixels ** 2))
        else:
            # If line, return the nearby segment(s)
            ind = segment_hits(mouseevent.x, mouseevent.y, xt, yt, pixels)

        # Debugging message
        if False and self._label != u"":
            print "Checking line", self._label, "at", mouseevent.x, mouseevent.y
            print "xt", xt
            print "yt", yt
            # print 'dx,dy', (xt-mouseevent.x)**2., (yt-mouseevent.y)**2.
            print "ind", ind

        # Return the point(s) within radius
        return len(ind) > 0, dict(ind=ind)

    def get_pickradius(self):
        "return the pick radius used for containment tests"
        return self.pickradius

    def set_pickradius(self, d):
        """Sets the pick radius used for containment tests

        Accepts: float distance in points.
        """
        self.pickradius = d

    def set_picker(self, p):
        """Sets the event picker details for the line.

        Accepts: float distance in points or callable pick function fn(artist,event)
        """
        if callable(p):
            self._contains = p
        else:
            self.pickradius = p
        self._picker = p

    def get_window_extent(self, renderer):
        bbox = Bbox.unit()
        bbox.update_from_data_xy(self.get_transform().transform(self.get_xydata()), ignore=True)
        # correct for marker size, if any
        if self._marker is not None:
            ms = (self._markersize / 72.0 * self.figure.dpi) * 0.5
            bbox = bbox.padded(ms)
        return bbox

    def set_axes(self, ax):
        Artist.set_axes(self, ax)
        if ax.xaxis is not None:
            self._xcid = ax.xaxis.callbacks.connect("units", self.recache)
        if ax.yaxis is not None:
            self._ycid = ax.yaxis.callbacks.connect("units", self.recache)

    def set_data(self, *args):
        """
        Set the x and y data

        ACCEPTS: (np.array xdata, np.array ydata)
        """
        if len(args) == 1:
            x, y = args[0]
        else:
            x, y = args

        not_masked = 0
        if not ma.isMaskedArray(x):
            x = np.asarray(x)
            not_masked += 1
        if not ma.isMaskedArray(y):
            y = np.asarray(y)
            not_masked += 1

        if (
            not_masked < 2
            or (x is not self._xorig and (x.shape != self._xorig.shape or np.any(x != self._xorig)))
            or (y is not self._yorig and (y.shape != self._yorig.shape or np.any(y != self._yorig)))
        ):
            self._xorig = x
            self._yorig = y
            self._invalid = True

    def recache(self):
        # if self.axes is None: print 'recache no axes'
        # else: print 'recache units', self.axes.xaxis.units, self.axes.yaxis.units
        if ma.isMaskedArray(self._xorig) or ma.isMaskedArray(self._yorig):
            x = ma.asarray(self.convert_xunits(self._xorig), float)
            y = ma.asarray(self.convert_yunits(self._yorig), float)
            x = ma.ravel(x)
            y = ma.ravel(y)
        else:
            x = np.asarray(self.convert_xunits(self._xorig), float)
            y = np.asarray(self.convert_yunits(self._yorig), float)
            x = np.ravel(x)
            y = np.ravel(y)

        if len(x) == 1 and len(y) > 1:
            x = x * np.ones(y.shape, float)
        if len(y) == 1 and len(x) > 1:
            y = y * np.ones(x.shape, float)

        if len(x) != len(y):
            raise RuntimeError("xdata and ydata must be the same length")

        x = x.reshape((len(x), 1))
        y = y.reshape((len(y), 1))

        if ma.isMaskedArray(x) or ma.isMaskedArray(y):
            self._xy = ma.concatenate((x, y), 1)
        else:
            self._xy = np.concatenate((x, y), 1)
        self._x = self._xy[:, 0]  # just a view
        self._y = self._xy[:, 1]  # just a view

        # Masked arrays are now handled by the Path class itself
        self._path = Path(self._xy)
        self._transformed_path = TransformedPath(self._path, self.get_transform())

        self._invalid = False

    def set_transform(self, t):
        """
        set the Transformation instance used by this artist

        ACCEPTS: a matplotlib.transforms.Transform instance
        """
        Artist.set_transform(self, t)
        self._invalid = True
        # self._transformed_path = TransformedPath(self._path, self.get_transform())

    def _is_sorted(self, x):
        "return true if x is sorted"
        if len(x) < 2:
            return 1
        return np.alltrue(x[1:] - x[0:-1] >= 0)

    def draw(self, renderer):
        if self._invalid:
            self.recache()

        renderer.open_group("line2d")

        if not self._visible:
            return
        gc = renderer.new_gc()
        self._set_gc_clip(gc)

        gc.set_foreground(self._color)
        gc.set_antialiased(self._antialiased)
        gc.set_linewidth(self._linewidth)
        gc.set_alpha(self._alpha)
        if self.is_dashed():
            cap = self._dashcapstyle
            join = self._dashjoinstyle
        else:
            cap = self._solidcapstyle
            join = self._solidjoinstyle
        gc.set_joinstyle(join)
        gc.set_capstyle(cap)

        funcname = self._lineStyles.get(self._linestyle, "_draw_nothing")
        if funcname != "_draw_nothing":
            tpath, affine = self._transformed_path.get_transformed_path_and_affine()
            lineFunc = getattr(self, funcname)
            lineFunc(renderer, gc, tpath, affine.frozen())

        if self._marker is not None:
            gc = renderer.new_gc()
            self._set_gc_clip(gc)
            gc.set_foreground(self.get_markeredgecolor())
            gc.set_linewidth(self._markeredgewidth)
            gc.set_alpha(self._alpha)
            funcname = self._markers.get(self._marker, "_draw_nothing")
            if funcname != "_draw_nothing":
                tpath, affine = self._transformed_path.get_transformed_points_and_affine()
                markerFunc = getattr(self, funcname)
                markerFunc(renderer, gc, tpath, affine.frozen())

        renderer.close_group("line2d")

    def get_antialiased(self):
        return self._antialiased

    def get_color(self):
        return self._color

    def get_linestyle(self):
        return self._linestyle

    def get_linewidth(self):
        return self._linewidth

    def get_marker(self):
        return self._marker

    def get_markeredgecolor(self):
        if is_string_like(self._markeredgecolor) and self._markeredgecolor == "auto":
            if self._marker in self.filled_markers:
                return "k"
            else:
                return self._color
        else:
            return self._markeredgecolor

        return self._markeredgecolor

    def get_markeredgewidth(self):
        return self._markeredgewidth

    def get_markerfacecolor(self):
        if self._markerfacecolor is None or (
            is_string_like(self._markerfacecolor) and self._markerfacecolor.lower() == "none"
        ):
            return self._markerfacecolor
        elif is_string_like(self._markerfacecolor) and self._markerfacecolor.lower() == "auto":
            return self._color
        else:
            return self._markerfacecolor

    def get_markersize(self):
        return self._markersize

    def get_data(self, orig=True):
        """
        Return the xdata, ydata.

        If *orig* is *True*, return the original data
        """
        return self.get_xdata(orig=orig), self.get_ydata(orig=orig)

    def get_xdata(self, orig=True):
        """
        Return the xdata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._xorig
        if self._invalid:
            self.recache()
        return self._x

    def get_ydata(self, orig=True):
        """
        Return the ydata.

        If *orig* is *True*, return the original data, else the
        processed data.
        """
        if orig:
            return self._yorig
        if self._invalid:
            self.recache()
        return self._y

    def get_path(self):
        """
        Return the :class:`~matplotlib.path.Path` object associated
        with this line.
        """
        if self._invalid:
            self.recache()
        return self._path

    def get_xydata(self):
        """
        Return the *xy* data as a Nx2 numpy array.
        """
        if self._invalid:
            self.recache()
        return self._xy

    def set_antialiased(self, b):
        """
        True if line should be drawin with antialiased rendering

        ACCEPTS: [True | False]
        """
        self._antialiased = b

    def set_color(self, color):
        """
        Set the color of the line

        ACCEPTS: any matplotlib color
        """
        self._color = color

    def set_linewidth(self, w):
        """
        Set the line width in points

        ACCEPTS: float value in points
        """
        self._linewidth = w

    def set_linestyle(self, linestyle):
        """
        Set the linestyle of the line

        'steps' is equivalent to 'steps-pre' and is maintained for
        backward-compatibility.

        ACCEPTS: [ '-' | '--' | '-.' | ':' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' | 'None' | ' ' | '' ]
        """
        if linestyle not in self._lineStyles:
            if ls_mapper.has_key(linestyle):
                linestyle = ls_mapper[linestyle]
            else:
                verbose.report("Unrecognized line style %s, %s" % (linestyle, type(linestyle)))
        if linestyle in [" ", ""]:
            linestyle = "None"
        self._linestyle = linestyle
        self._lineFunc = self._lineStyles[linestyle]

    def set_marker(self, marker):
        """
        Set the line marker

        ACCEPTS: [ '+' | ',' | '.' | '1' | '2' | '3' | '4'
                 | '<' | '>' | 'D' | 'H' | '^' | '_' | 'd'
                 | 'h' | 'o' | 'p' | 's' | 'v' | 'x' | '|'
                 | TICKUP | TICKDOWN | TICKLEFT | TICKRIGHT
                 | 'None' | ' ' | '' ]

        """
        if marker not in self._markers:
            verbose.report("Unrecognized marker style %s, %s" % (marker, type(marker)))
        if marker in [" ", ""]:
            marker = "None"
        self._marker = marker
        self._markerFunc = self._markers[marker]

    def set_markeredgecolor(self, ec):
        """
        Set the marker edge color

        ACCEPTS: any matplotlib color
        """
        if ec is None:
            ec = "auto"
        self._markeredgecolor = ec

    def set_markeredgewidth(self, ew):
        """
        Set the marker edge width in points

        ACCEPTS: float value in points
        """
        if ew is None:
            ew = rcParams["lines.markeredgewidth"]
        self._markeredgewidth = ew

    def set_markerfacecolor(self, fc):
        """
        Set the marker face color

        ACCEPTS: any matplotlib color
        """
        if fc is None:
            fc = "auto"
        self._markerfacecolor = fc

    def set_markersize(self, sz):
        """
        Set the marker size in points

        ACCEPTS: float
        """
        self._markersize = sz

    def set_xdata(self, x):
        """
        Set the data np.array for x

        ACCEPTS: np.array
        """
        x = np.asarray(x)
        self.set_data(x, self._yorig)

    def set_ydata(self, y):
        """
        Set the data np.array for y

        ACCEPTS: np.array
        """
        y = np.asarray(y)
        self.set_data(self._xorig, y)

    def set_dashes(self, seq):
        """
        Set the dash sequence, sequence of dashes with on off ink in
        points.  If seq is empty or if seq = (None, None), the
        linestyle will be set to solid.

        ACCEPTS: sequence of on/off ink in points
        """
        if seq == (None, None) or len(seq) == 0:
            self.set_linestyle("-")
        else:
            self.set_linestyle("--")
        self._dashSeq = seq  # TODO: offset ignored for now

    def _draw_nothing(self, *args, **kwargs):
        pass

    def _draw_solid(self, renderer, gc, path, trans):
        gc.set_linestyle("solid")
        renderer.draw_path(gc, path, trans)

    def _draw_steps_pre(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)

        steps[0::2, 0], steps[1::2, 0] = vertices[:, 0], vertices[:-1, 0]
        steps[0::2, 1], steps[1:-1:2, 1] = vertices[:, 1], vertices[1:, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)

    def _draw_steps_post(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices) - 1, 2), np.float_)

        steps[::2, 0], steps[1:-1:2, 0] = vertices[:, 0], vertices[1:, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:-1, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)

    def _draw_steps_mid(self, renderer, gc, path, trans):
        vertices = self._xy
        steps = ma.zeros((2 * len(vertices), 2), np.float_)

        steps[1:-1:2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[2::2, 0] = 0.5 * (vertices[:-1, 0] + vertices[1:, 0])
        steps[0, 0] = vertices[0, 0]
        steps[-1, 0] = vertices[-1, 0]
        steps[0::2, 1], steps[1::2, 1] = vertices[:, 1], vertices[:, 1]

        path = Path(steps)
        self._draw_solid(renderer, gc, path, trans)

    def _draw_dashed(self, renderer, gc, path, trans):
        gc.set_linestyle("dashed")
        if self._dashSeq is not None:
            gc.set_dashes(0, self._dashSeq)

        renderer.draw_path(gc, path, trans)

    def _draw_dash_dot(self, renderer, gc, path, trans):
        gc.set_linestyle("dashdot")
        renderer.draw_path(gc, path, trans)

    def _draw_dotted(self, renderer, gc, path, trans):
        gc.set_linestyle("dotted")
        renderer.draw_path(gc, path, trans)

    def _draw_point(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * self._point_size_reduction * 0.5
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w)
        renderer.draw_markers(gc, Path.unit_circle(), transform, path, path_trans, rgbFace)

    _draw_pixel_transform = Affine2D().translate(-0.5, -0.5)

    def _draw_pixel(self, renderer, gc, path, path_trans):
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), self._draw_pixel_transform, path, path_trans, rgbFace)

    def _draw_circle(self, renderer, gc, path, path_trans):
        w = renderer.points_to_pixels(self._markersize) * 0.5
        rgbFace = self._get_rgb_face()
        transform = Affine2D().scale(w, w)
        renderer.draw_markers(gc, Path.unit_circle(), transform, path, path_trans, rgbFace)

    _triangle_path = Path([[0.0, 1.0], [-1.0, -1.0], [1.0, -1.0], [0.0, 1.0]])

    def _draw_triangle_up(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform, path, path_trans, rgbFace)

    def _draw_triangle_down(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, -offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform, path, path_trans, rgbFace)

    def _draw_triangle_left(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform, path, path_trans, rgbFace)

    def _draw_triangle_right(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset, offset).rotate_deg(-90)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, self._triangle_path, transform, path, path_trans, rgbFace)

    def _draw_square(self, renderer, gc, path, path_trans):
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform, path, path_trans, rgbFace)

    def _draw_diamond(self, renderer, gc, path, path_trans):
        side = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).rotate_deg(45).scale(side)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform, path, path_trans, rgbFace)

    def _draw_thin_diamond(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        transform = Affine2D().translate(-0.5, -0.5).rotate_deg(45).scale(offset * 0.6, offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_rectangle(), transform, path, path_trans, rgbFace)

    def _draw_pentagon(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(5), transform, path, path_trans, rgbFace)

    def _draw_hexagon1(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform, path, path_trans, rgbFace)

    def _draw_hexagon2(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(30)
        rgbFace = self._get_rgb_face()
        renderer.draw_markers(gc, Path.unit_regular_polygon(6), transform, path, path_trans, rgbFace)

    _line_marker_path = Path([[0.0, -1.0], [0.0, 1.0]])

    def _draw_vline(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._line_marker_path, transform, path, path_trans)

    def _draw_hline(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._line_marker_path, transform, path, path_trans)

    _tickhoriz_path = Path([[0.0, 0.0], [1.0, 0.0]])

    def _draw_tickleft(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(-offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform, path, path_trans)

    def _draw_tickright(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(offset, 1.0)
        renderer.draw_markers(gc, self._tickhoriz_path, marker_transform, path, path_trans)

    _tickvert_path = Path([[-0.0, 0.0], [-0.0, 1.0]])

    def _draw_tickup(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform, path, path_trans)

    def _draw_tickdown(self, renderer, gc, path, path_trans):
        offset = renderer.points_to_pixels(self._markersize)
        marker_transform = Affine2D().scale(1.0, -offset)
        renderer.draw_markers(gc, self._tickvert_path, marker_transform, path, path_trans)

    _plus_path = Path(
        [[-1.0, 0.0], [1.0, 0.0], [0.0, -1.0], [0.0, 1.0]], [Path.MOVETO, Path.LINETO, Path.MOVETO, Path.LINETO]
    )

    def _draw_plus(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._plus_path, transform, path, path_trans)

    _tri_path = Path(
        [[0.0, 0.0], [0.0, -1.0], [0.0, 0.0], [0.8, 0.5], [0.0, 0.0], [-0.8, 0.5]],
        [Path.MOVETO, Path.LINETO, Path.MOVETO, Path.LINETO, Path.MOVETO, Path.LINETO],
    )

    def _draw_tri_down(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._tri_path, transform, path, path_trans)

    def _draw_tri_up(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._tri_path, transform, path, path_trans)

    def _draw_tri_left(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._tri_path, transform, path, path_trans)

    def _draw_tri_right(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._tri_path, transform, path, path_trans)

    _caret_path = Path([[-1.0, 1.5], [0.0, 0.0], [1.0, 1.5]])

    def _draw_caretdown(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._caret_path, transform, path, path_trans)

    def _draw_caretup(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(180)
        renderer.draw_markers(gc, self._caret_path, transform, path, path_trans)

    def _draw_caretleft(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(270)
        renderer.draw_markers(gc, self._caret_path, transform, path, path_trans)

    def _draw_caretright(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset).rotate_deg(90)
        renderer.draw_markers(gc, self._caret_path, transform, path, path_trans)

    _x_path = Path(
        [[-1.0, -1.0], [1.0, 1.0], [-1.0, 1.0], [1.0, -1.0]], [Path.MOVETO, Path.LINETO, Path.MOVETO, Path.LINETO]
    )

    def _draw_x(self, renderer, gc, path, path_trans):
        offset = 0.5 * renderer.points_to_pixels(self._markersize)
        transform = Affine2D().scale(offset)
        renderer.draw_markers(gc, self._x_path, transform, path, path_trans)

    def update_from(self, other):
        "copy properties from other to self"
        Artist.update_from(self, other)
        self._linestyle = other._linestyle
        self._linewidth = other._linewidth
        self._color = other._color
        self._markersize = other._markersize
        self._markerfacecolor = other._markerfacecolor
        self._markeredgecolor = other._markeredgecolor
        self._markeredgewidth = other._markeredgewidth
        self._dashSeq = other._dashSeq
        self._dashcapstyle = other._dashcapstyle
        self._dashjoinstyle = other._dashjoinstyle
        self._solidcapstyle = other._solidcapstyle
        self._solidjoinstyle = other._solidjoinstyle

        self._linestyle = other._linestyle
        self._marker = other._marker

    def _get_rgb_face(self):
        facecolor = self.get_markerfacecolor()
        if is_string_like(facecolor) and facecolor.lower() == "none":
            rgbFace = None
        else:
            rgbFace = colorConverter.to_rgb(facecolor)
        return rgbFace

    # some aliases....
    def set_aa(self, val):
        "alias for set_antialiased"
        self.set_antialiased(val)

    def set_c(self, val):
        "alias for set_color"
        self.set_color(val)

    def set_ls(self, val):
        "alias for set_linestyle"
        self.set_linestyle(val)

    def set_lw(self, val):
        "alias for set_linewidth"
        self.set_linewidth(val)

    def set_mec(self, val):
        "alias for set_markeredgecolor"
        self.set_markeredgecolor(val)

    def set_mew(self, val):
        "alias for set_markeredgewidth"
        self.set_markeredgewidth(val)

    def set_mfc(self, val):
        "alias for set_markerfacecolor"
        self.set_markerfacecolor(val)

    def set_ms(self, val):
        "alias for set_markersize"
        self.set_markersize(val)

    def get_aa(self):
        "alias for get_antialiased"
        return self.get_antialiased()

    def get_c(self):
        "alias for get_color"
        return self.get_color()

    def get_ls(self):
        "alias for get_linestyle"
        return self.get_linestyle()

    def get_lw(self):
        "alias for get_linewidth"
        return self.get_linewidth()

    def get_mec(self):
        "alias for get_markeredgecolor"
        return self.get_markeredgecolor()

    def get_mew(self):
        "alias for get_markeredgewidth"
        return self.get_markeredgewidth()

    def get_mfc(self):
        "alias for get_markerfacecolor"
        return self.get_markerfacecolor()

    def get_ms(self):
        "alias for get_markersize"
        return self.get_markersize()

    def set_dash_joinstyle(self, s):
        """
        Set the join style for dashed linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError('set_dash_joinstyle passed "%s";\n' % (s,) + "valid joinstyles are %s" % (self.validJoin,))
        self._dashjoinstyle = s

    def set_solid_joinstyle(self, s):
        """
        Set the join style for solid linestyles
        ACCEPTS: ['miter' | 'round' | 'bevel']
        """
        s = s.lower()
        if s not in self.validJoin:
            raise ValueError(
                'set_solid_joinstyle passed "%s";\n' % (s,) + "valid joinstyles are %s" % (self.validJoin,)
            )
        self._solidjoinstyle = s

    def get_dash_joinstyle(self):
        """
        Get the join style for dashed linestyles
        """
        return self._dashjoinstyle

    def get_solid_joinstyle(self):
        """
        Get the join style for solid linestyles
        """
        return self._solidjoinstyle

    def set_dash_capstyle(self, s):
        """
        Set the cap style for dashed linestyles

        ACCEPTS: ['butt' | 'round' | 'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_dash_capstyle passed "%s";\n' % (s,) + "valid capstyles are %s" % (self.validCap,))

        self._dashcapstyle = s

    def set_solid_capstyle(self, s):
        """
        Set the cap style for solid linestyles

        ACCEPTS: ['butt' | 'round' |  'projecting']
        """
        s = s.lower()
        if s not in self.validCap:
            raise ValueError('set_solid_capstyle passed "%s";\n' % (s,) + "valid capstyles are %s" % (self.validCap,))

        self._solidcapstyle = s

    def get_dash_capstyle(self):
        """
        Get the cap style for dashed linestyles
        """
        return self._dashcapstyle

    def get_solid_capstyle(self):
        """
        Get the cap style for solid linestyles
        """
        return self._solidcapstyle

    def is_dashed(self):
        "return True if line is dashstyle"
        return self._linestyle in ("--", "-.", ":")