def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK (self, self.figure.dpi)
class FigureCanvasGTK(gtk.DrawingArea, FigureCanvasBase):
keyvald = {
65507: 'control',
65505: 'shift',
65513: 'alt',
65508: 'control',
65506: 'shift',
65514: 'alt',
65361: 'left',
65362: 'up',
65363: 'right',
65364: 'down',
65307: 'escape',
65470: 'f1',
65471: 'f2',
65472: 'f3',
65473: 'f4',
65474: 'f5',
65475: 'f6',
65476: 'f7',
65477: 'f8',
65478: 'f9',
65479: 'f10',
65480: 'f11',
65481: 'f12',
65300: 'scroll_lock',
65299: 'break',
65288: 'backspace',
65293: 'enter',
65379: 'insert',
65535: 'delete',
65360: 'home',
65367: 'end',
65365: 'pageup',
65366: 'pagedown',
65438: '0',
65436: '1',
65433: '2',
65435: '3',
65430: '4',
65437: '5',
65432: '6',
65429: '7',
65431: '8',
65434: '9',
65451: '+',
65453: '-',
65450: '*',
65455: '/',
65439: 'dec',
65421: 'enter',
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK
| gdk.EXPOSURE_MASK | gdk.KEY_PRESS_MASK
| gdk.KEY_RELEASE_MASK | gdk.ENTER_NOTIFY_MASK
| gdk.LEAVE_NOTIFY_MASK | gdk.POINTER_MOTION_MASK
| gdk.POINTER_MOTION_HINT_MASK)
def __init__(self, figure):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idle_draw_id = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('scroll_event', self.scroll_event)
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.connect('leave_notify_event', self.leave_notify_event)
self.connect('enter_notify_event', self.enter_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
self._idle_event_id = gobject.idle_add(self.idle_event)
def destroy(self):
#gtk.DrawingArea.destroy(self)
gobject.source_remove(self._idle_event_id)
if self._idle_draw_id != 0:
gobject.source_remove(self._idle_draw_id)
def scroll_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction == gdk.SCROLL_UP:
step = 1
else:
step = -1
FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
return False # finish event propagation?
def button_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_press_event(self,
x,
y,
event.button,
guiEvent=event)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self,
x,
y,
event.button,
guiEvent=event)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "hit", key
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "release", key
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
return False # finish event propagation?
def leave_notify_event(self, widget, event):
FigureCanvasBase.leave_notify_event(self, event)
def enter_notify_event(self, widget, event):
FigureCanvasBase.enter_notify_event(self, event)
def _get_key(self, event):
if event.keyval in self.keyvald:
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
ctrl = event.state & gdk.CONTROL_MASK
shift = event.state & gdk.SHIFT_MASK
return key
def configure_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches(w / dpi, h / dpi)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates(False)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idle_draw_id = 0
return False
if self._idle_draw_id == 0:
self._idle_draw_id = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max(int(self._pixmap_width * 1.1), width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max(int(self._pixmap_height * 1.1), height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap(self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap(self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height(width, height)
self.figure.draw(self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare(w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable(self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes['jpg'] = 'JPEG'
filetypes['jpeg'] = 'JPEG'
filetypes['png'] = 'Portable Network Graphics'
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, 'jpeg')
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, 'png')
def _print_image(self, filename, format):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap(self.window, width, height)
self._renderer.set_pixmap(pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0,
width, height)
if is_string_like(filename):
try:
pixbuf.save(filename, format)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc, ),
parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, 'save_to_callback'):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback,
format,
user_data=filename)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc, ),
parent=self)
class FigureCanvasGTK (gtk.DrawingArea, FigureCanvasBase):
keyvald = {65507 : 'control',
65505 : 'shift',
65513 : 'alt',
65508 : 'control',
65506 : 'shift',
65514 : 'alt',
65361 : 'left',
65362 : 'up',
65363 : 'right',
65364 : 'down',
65307 : 'escape',
65470 : 'f1',
65471 : 'f2',
65472 : 'f3',
65473 : 'f4',
65474 : 'f5',
65475 : 'f6',
65476 : 'f7',
65477 : 'f8',
65478 : 'f9',
65479 : 'f10',
65480 : 'f11',
65481 : 'f12',
65300 : 'scroll_lock',
65299 : 'break',
65288 : 'backspace',
65293 : 'enter',
65379 : 'insert',
65535 : 'delete',
65360 : 'home',
65367 : 'end',
65365 : 'pageup',
65366 : 'pagedown',
65438 : '0',
65436 : '1',
65433 : '2',
65435 : '3',
65430 : '4',
65437 : '5',
65432 : '6',
65429 : '7',
65431 : '8',
65434 : '9',
65451 : '+',
65453 : '-',
65450 : '*',
65455 : '/',
65439 : 'dec',
65421 : 'enter',
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.EXPOSURE_MASK |
gdk.KEY_PRESS_MASK |
gdk.KEY_RELEASE_MASK |
gdk.ENTER_NOTIFY_MASK |
gdk.LEAVE_NOTIFY_MASK |
gdk.POINTER_MOTION_MASK |
gdk.POINTER_MOTION_HINT_MASK)
def __init__(self, figure):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idle_draw_id = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('scroll_event', self.scroll_event)
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.connect('leave_notify_event', self.leave_notify_event)
self.connect('enter_notify_event', self.enter_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
self._idle_event_id = gobject.idle_add(self.idle_event)
def destroy(self):
#gtk.DrawingArea.destroy(self)
gobject.source_remove(self._idle_event_id)
if self._idle_draw_id != 0:
gobject.source_remove(self._idle_draw_id)
def scroll_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction==gdk.SCROLL_UP:
step = 1
else:
step = -1
FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
return False # finish event propagation?
def button_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_press_event(self, x, y, event.button, guiEvent=event)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button, guiEvent=event)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "hit", key
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "release", key
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
return False # finish event propagation?
def leave_notify_event(self, widget, event):
FigureCanvasBase.leave_notify_event(self, event)
def enter_notify_event(self, widget, event):
FigureCanvasBase.enter_notify_event(self, event)
def _get_key(self, event):
if event.keyval in self.keyvald:
key = self.keyvald[event.keyval]
elif event.keyval <256:
key = chr(event.keyval)
else:
key = None
ctrl = event.state & gdk.CONTROL_MASK
shift = event.state & gdk.SHIFT_MASK
return key
def configure_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches (w/dpi, h/dpi)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates (False)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idle_draw_id = 0
return False
if self._idle_draw_id == 0:
self._idle_draw_id = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK (self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max (int (self._pixmap_width * 1.1),
width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max (int (self._pixmap_height * 1.1),
height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap (self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap (self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height (width, height)
self.figure.draw (self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare (w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable (self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes['jpg'] = 'JPEG'
filetypes['jpeg'] = 'JPEG'
filetypes['png'] = 'Portable Network Graphics'
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, 'jpeg')
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, 'png')
def _print_image(self, filename, format):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap (self.window, width, height)
self._renderer.set_pixmap (pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(),
0, 0, 0, 0, width, height)
if is_string_like(filename):
try:
pixbuf.save(filename, format)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc,), parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, 'save_to_callback'):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback, format, user_data=filename)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc,), parent=self)
class FigureCanvasGTK(gtk.DrawingArea, FigureCanvasBase):
keyvald = {
65507: 'control',
65505: 'shift',
65513: 'alt',
65508: 'control',
65506: 'shift',
65514: 'alt',
65361: 'left',
65362: 'up',
65363: 'right',
65364: 'down',
65307: 'escape',
65470: 'f1',
65471: 'f2',
65472: 'f3',
65473: 'f4',
65474: 'f5',
65475: 'f6',
65476: 'f7',
65477: 'f8',
65478: 'f9',
65479: 'f10',
65480: 'f11',
65481: 'f12',
65300: 'scroll_lock',
65299: 'break',
65288: 'backspace',
65293: 'enter',
65379: 'insert',
65535: 'delete',
65360: 'home',
65367: 'end',
65365: 'pageup',
65366: 'pagedown',
65438: '0',
65436: '1',
65433: '2',
65435: '3',
65430: '4',
65437: '5',
65432: '6',
65429: '7',
65431: '8',
65434: '9',
65451: '+',
65453: '-',
65450: '*',
65455: '/',
65439: 'dec',
65421: 'enter',
65511: 'super',
65512: 'super',
65406: 'alt',
65289: 'tab',
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK
| gdk.EXPOSURE_MASK | gdk.KEY_PRESS_MASK
| gdk.KEY_RELEASE_MASK | gdk.ENTER_NOTIFY_MASK
| gdk.LEAVE_NOTIFY_MASK | gdk.POINTER_MOTION_MASK
| gdk.POINTER_MOTION_HINT_MASK)
def __init__(self, figure):
if self.__class__ == matplotlib.backends.backend_gtk.FigureCanvasGTK:
warn_deprecated('2.0',
message="The GTK backend is "
"deprecated. It is untested, known to be "
"broken and will be removed in Matplotlib 2.2. "
"Use the GTKAgg backend instead. "
"See Matplotlib usage FAQ for"
" more info on backends.",
alternative="GTKAgg")
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idle_draw_id = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('scroll_event', self.scroll_event)
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.connect('leave_notify_event', self.leave_notify_event)
self.connect('enter_notify_event', self.enter_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
self.last_downclick = {}
def destroy(self):
#gtk.DrawingArea.destroy(self)
self.close_event()
if self._idle_draw_id != 0:
gobject.source_remove(self._idle_draw_id)
def scroll_event(self, widget, event):
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction == gdk.SCROLL_UP:
step = 1
else:
step = -1
FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
return False # finish event propagation?
def button_press_event(self, widget, event):
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
dblclick = (event.type == gdk._2BUTTON_PRESS)
if not dblclick:
# GTK is the only backend that generates a DOWN-UP-DOWN-DBLCLICK-UP event
# sequence for a double click. All other backends have a DOWN-UP-DBLCLICK-UP
# sequence. In order to provide consistency to matplotlib users, we will
# eat the extra DOWN event in the case that we detect it is part of a double
# click.
# first, get the double click time in milliseconds.
current_time = event.get_time()
last_time = self.last_downclick.get(event.button, 0)
dblclick_time = gtk.settings_get_for_screen(
gdk.screen_get_default()).get_property('gtk-double-click-time')
delta_time = current_time - last_time
if delta_time < dblclick_time:
del self.last_downclick[
event.button] # we do not want to eat more than one event.
return False # eat.
self.last_downclick[event.button] = current_time
FigureCanvasBase.button_press_event(self,
x,
y,
event.button,
dblclick=dblclick,
guiEvent=event)
return False # finish event propagation?
def button_release_event(self, widget, event):
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self,
x,
y,
event.button,
guiEvent=event)
return False # finish event propagation?
def key_press_event(self, widget, event):
key = self._get_key(event)
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
return True # stop event propagation
def key_release_event(self, widget, event):
key = self._get_key(event)
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
return True # stop event propagation
def motion_notify_event(self, widget, event):
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
return False # finish event propagation?
def leave_notify_event(self, widget, event):
FigureCanvasBase.leave_notify_event(self, event)
def enter_notify_event(self, widget, event):
x, y, state = event.window.get_pointer()
FigureCanvasBase.enter_notify_event(self, event, xy=(x, y))
def _get_key(self, event):
if event.keyval in self.keyvald:
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
for key_mask, prefix in (
[gdk.MOD4_MASK, 'super'],
[gdk.MOD1_MASK, 'alt'],
[gdk.CONTROL_MASK, 'ctrl'],
):
if event.state & key_mask:
key = '{0}+{1}'.format(prefix, key)
return key
def configure_event(self, widget, event):
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches(w / dpi, h / dpi, forward=False)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates(False)
def draw_idle(self):
if self._idle_draw_id != 0:
return
def idle_draw(*args):
try:
self.draw()
finally:
self._idle_draw_id = 0
return False
self._idle_draw_id = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max(int(self._pixmap_width * 1.1), width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max(int(self._pixmap_height * 1.1), height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap(self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap(self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height(width, height)
self.figure.draw(self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
toolbar = self.toolbar
if toolbar:
toolbar.set_cursor(cursors.WAIT)
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare(w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable(self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
if toolbar:
toolbar.set_cursor(toolbar._lastCursor)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes['jpg'] = 'JPEG'
filetypes['jpeg'] = 'JPEG'
filetypes['png'] = 'Portable Network Graphics'
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, 'jpeg')
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, 'png')
def _print_image(self, filename, format, *args, **kwargs):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap(self.window, width, height)
self._renderer.set_pixmap(pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0,
width, height)
# set the default quality, if we are writing a JPEG.
# http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html#method-gdkpixbuf--save
options = {k: kwargs[k] for k in ['quality'] if k in kwargs}
if format in ['jpg', 'jpeg']:
options.setdefault('quality', rcParams['savefig.jpeg_quality'])
options['quality'] = str(options['quality'])
if isinstance(filename, six.string_types):
try:
pixbuf.save(filename, format, options=options)
except gobject.GError as exc:
error_msg_gtk('Save figure failure:\n%s' % (exc, ),
parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, 'save_to_callback'):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback,
format,
user_data=filename,
options=options)
except gobject.GError as exc:
error_msg_gtk('Save figure failure:\n%s' % (exc, ),
parent=self)
else:
raise ValueError(
"Saving to a Python file-like object is only supported by PyGTK >= 2.8"
)
else:
raise ValueError("filename must be a path or a file-like object")
def new_timer(self, *args, **kwargs):
"""
Creates a new backend-specific subclass of :class:`backend_bases.Timer`.
This is useful for getting periodic events through the backend's native
event loop. Implemented only for backends with GUIs.
Other Parameters
----------------
interval : scalar
Timer interval in milliseconds
callbacks : list
Sequence of (func, args, kwargs) where ``func(*args, **kwargs)``
will be executed by the timer every *interval*.
"""
return TimerGTK(*args, **kwargs)
def flush_events(self):
gtk.gdk.threads_enter()
while gtk.events_pending():
gtk.main_iteration(True)
gtk.gdk.flush()
gtk.gdk.threads_leave()
class FigureCanvasGTK(gtk.DrawingArea, FigureCanvasBase):
keyvald = {
65507: 'control',
65505: 'shift',
65513: 'alt',
65508: 'control',
65506: 'shift',
65514: 'alt',
65361: 'left',
65362: 'up',
65363: 'right',
65364: 'down',
}
def __init__(self, figure):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idleID = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.set_events(gdk.BUTTON_PRESS_MASK | gdk.BUTTON_RELEASE_MASK
| gdk.EXPOSURE_MASK | gdk.KEY_PRESS_MASK
| gdk.KEY_RELEASE_MASK | gdk.LEAVE_NOTIFY_MASK
| gdk.POINTER_MOTION_MASK
| gdk.POINTER_MOTION_HINT_MASK)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
def button_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_press_event(self, x, y, event.button)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "hit", key
FigureCanvasBase.key_press_event(self, key)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "release", key
FigureCanvasBase.key_release_event(self, key)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y)
return False # finish event propagation?
def _get_key(self, event):
if self.keyvald.has_key(event.keyval):
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
ctrl = event.state & gdk.CONTROL_MASK
shift = event.state & gdk.SHIFT_MASK
return key
def configure_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi.get()
self.figure.set_figsize_inches(w / dpi, h / dpi)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates(False)
## synchronous draw (needed for animation)
#x, y, w, h = self.allocation
#if w<3 or h<3: return # empty fig
#self._pixmap_prepare (w, h)
#self._render_figure(self._pixmap, w, h)
#self._need_redraw = False
#self.window.draw_drawable (self.style.fg_gc[self.state],
# self._pixmap, 0, 0, 0, 0, w, h)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idleID = 0
return False
if self._idleID == 0:
self._idleID = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max(int(self._pixmap_width * 1.1), width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max(int(self._pixmap_height * 1.1), height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap(self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap(self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height(width, height)
self.figure.draw(self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare(w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable(self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
def print_figure(self,
filename,
dpi=150,
facecolor='w',
edgecolor='w',
orientation='portrait'):
# TODO - use gdk/cairo/agg print_figure?
root, ext = os.path.splitext(filename)
ext = ext[1:]
if ext == '':
ext = IMAGE_FORMAT_DEFAULT
filename = filename + '.' + ext
# save figure settings
origDPI = self.figure.dpi.get()
origfacecolor = self.figure.get_facecolor()
origedgecolor = self.figure.get_edgecolor()
origWIn, origHIn = self.figure.get_size_inches()
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
self.figure.dpi.set(dpi)
self.figure.set_facecolor(facecolor)
self.figure.set_edgecolor(edgecolor)
ext = ext.lower()
if ext in ('jpg', 'png'): # native printing
width, height = self.get_width_height()
pixmap = gdk.Pixmap(self.window, width, height)
self._renderer.set_pixmap(pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0,
width, height)
# pixbuf.save() recognises 'jpeg' not 'jpg'
if ext == 'jpg': ext = 'jpeg'
try:
pixbuf.save(filename, ext)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc, ),
parent=self)
elif ext in (
'eps',
'ps',
'svg',
):
if ext == 'svg':
from backend_svg import FigureCanvasSVG as FigureCanvas
else:
from backend_ps import FigureCanvasPS as FigureCanvas
try:
fc = self.switch_backends(FigureCanvas)
fc.print_figure(filename, dpi, facecolor, edgecolor,
orientation)
except IOError, exc:
error_msg_gtk("Save figure failure:\n%s: %s" %
(exc.filename, exc.strerror),
parent=self)
class FigureCanvasGTK (gtk.DrawingArea, FigureCanvasBase):
keyvald = {65507 : 'control',
65505 : 'shift',
65513 : 'alt',
65508 : 'control',
65506 : 'shift',
65514 : 'alt',
65361 : 'left',
65362 : 'up',
65363 : 'right',
65364 : 'down',
65307 : 'escape',
65470 : 'f1',
65471 : 'f2',
65472 : 'f3',
65473 : 'f4',
65474 : 'f5',
65475 : 'f6',
65476 : 'f7',
65477 : 'f8',
65478 : 'f9',
65479 : 'f10',
65480 : 'f11',
65481 : 'f12',
65300 : 'scroll_lock',
65299 : 'break',
65288 : 'backspace',
65293 : 'enter',
65379 : 'insert',
65535 : 'delete',
65360 : 'home',
65367 : 'end',
65365 : 'pageup',
65366 : 'pagedown',
65438 : '0',
65436 : '1',
65433 : '2',
65435 : '3',
65430 : '4',
65437 : '5',
65432 : '6',
65429 : '7',
65431 : '8',
65434 : '9',
65451 : '+',
65453 : '-',
65450 : '*',
65455 : '/',
65439 : 'dec',
65421 : 'enter',
65511 : 'super',
65512 : 'super',
65406 : 'alt',
65289 : 'tab',
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.EXPOSURE_MASK |
gdk.KEY_PRESS_MASK |
gdk.KEY_RELEASE_MASK |
gdk.ENTER_NOTIFY_MASK |
gdk.LEAVE_NOTIFY_MASK |
gdk.POINTER_MOTION_MASK |
gdk.POINTER_MOTION_HINT_MASK)
def __init__(self, figure):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idle_draw_id = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('scroll_event', self.scroll_event)
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.connect('leave_notify_event', self.leave_notify_event)
self.connect('enter_notify_event', self.enter_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
self._idle_event_id = gobject.idle_add(self.idle_event)
self.last_downclick = {}
def destroy(self):
#gtk.DrawingArea.destroy(self)
self.close_event()
gobject.source_remove(self._idle_event_id)
if self._idle_draw_id != 0:
gobject.source_remove(self._idle_draw_id)
def scroll_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction==gdk.SCROLL_UP:
step = 1
else:
step = -1
FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
return False # finish event propagation?
def button_press_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
dblclick = (event.type == gdk._2BUTTON_PRESS)
if not dblclick:
# GTK is the only backend that generates a DOWN-UP-DOWN-DBLCLICK-UP event
# sequence for a double click. All other backends have a DOWN-UP-DBLCLICK-UP
# sequence. In order to provide consistency to matplotlib users, we will
# eat the extra DOWN event in the case that we detect it is part of a double
# click.
# first, get the double click time in milliseconds.
current_time = event.get_time()
last_time = self.last_downclick.get(event.button,0)
dblclick_time = gtk.settings_get_for_screen(gdk.screen_get_default()).get_property('gtk-double-click-time')
delta_time = current_time-last_time
if delta_time < dblclick_time:
del self.last_downclick[event.button] # we do not want to eat more than one event.
return False # eat.
self.last_downclick[event.button] = current_time
FigureCanvasBase.button_press_event(self, x, y, event.button, dblclick=dblclick, guiEvent=event)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button, guiEvent=event)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
key = self._get_key(event)
if _debug: print("hit", key)
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
key = self._get_key(event)
if _debug: print("release", key)
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
return False # finish event propagation?
def leave_notify_event(self, widget, event):
FigureCanvasBase.leave_notify_event(self, event)
def enter_notify_event(self, widget, event):
x, y, state = event.window.get_pointer()
FigureCanvasBase.enter_notify_event(self, event, xy=(x,y))
def _get_key(self, event):
if event.keyval in self.keyvald:
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
for key_mask, prefix in (
[gdk.MOD4_MASK, 'super'],
[gdk.MOD1_MASK, 'alt'],
[gdk.CONTROL_MASK, 'ctrl'],):
if event.state & key_mask:
key = '{0}+{1}'.format(prefix, key)
return key
def configure_event(self, widget, event):
if _debug: print('FigureCanvasGTK.%s' % fn_name())
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches (w/dpi, h/dpi)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates (False)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idle_draw_id = 0
return False
if self._idle_draw_id == 0:
self._idle_draw_id = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK (self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug: print('FigureCanvasGTK.%s' % fn_name())
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max (int (self._pixmap_width * 1.1),
width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max (int (self._pixmap_height * 1.1),
height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap (self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap (self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height (width, height)
self.figure.draw (self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug: print('FigureCanvasGTK.%s' % fn_name())
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare (w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable (self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes['jpg'] = 'JPEG'
filetypes['jpeg'] = 'JPEG'
filetypes['png'] = 'Portable Network Graphics'
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, 'jpeg')
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, 'png')
def _print_image(self, filename, format):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap (self.window, width, height)
self._renderer.set_pixmap (pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(),
0, 0, 0, 0, width, height)
if is_string_like(filename):
try:
pixbuf.save(filename, format)
except gobject.GError as exc:
error_msg_gtk('Save figure failure:\n%s' % (exc,), parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, 'save_to_callback'):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback, format, user_data=filename)
except gobject.GError as exc:
error_msg_gtk('Save figure failure:\n%s' % (exc,), parent=self)
else:
raise ValueError("Saving to a Python file-like object is only supported by PyGTK >= 2.8")
else:
raise ValueError("filename must be a path or a file-like object")
def new_timer(self, *args, **kwargs):
"""
Creates a new backend-specific subclass of :class:`backend_bases.Timer`.
This is useful for getting periodic events through the backend's native
event loop. Implemented only for backends with GUIs.
optional arguments:
*interval*
Timer interval in milliseconds
*callbacks*
Sequence of (func, args, kwargs) where func(*args, **kwargs) will
be executed by the timer every *interval*.
"""
return TimerGTK(*args, **kwargs)
def flush_events(self):
gtk.gdk.threads_enter()
while gtk.events_pending():
gtk.main_iteration(True)
gtk.gdk.flush()
gtk.gdk.threads_leave()
def start_event_loop(self,timeout):
FigureCanvasBase.start_event_loop_default(self,timeout)
start_event_loop.__doc__=FigureCanvasBase.start_event_loop_default.__doc__
def stop_event_loop(self):
FigureCanvasBase.stop_event_loop_default(self)
stop_event_loop.__doc__=FigureCanvasBase.stop_event_loop_default.__doc__
class FigureCanvasGTK(gtk.DrawingArea, FigureCanvasBase):
keyvald = {
65507: "control",
65505: "shift",
65513: "alt",
65508: "control",
65506: "shift",
65514: "alt",
65361: "left",
65362: "up",
65363: "right",
65364: "down",
65307: "escape",
65470: "f1",
65471: "f2",
65472: "f3",
65473: "f4",
65474: "f5",
65475: "f6",
65476: "f7",
65477: "f8",
65478: "f9",
65479: "f10",
65480: "f11",
65481: "f12",
65300: "scroll_lock",
65299: "break",
65288: "backspace",
65293: "enter",
65379: "insert",
65535: "delete",
65360: "home",
65367: "end",
65365: "pageup",
65366: "pagedown",
65438: "0",
65436: "1",
65433: "2",
65435: "3",
65430: "4",
65437: "5",
65432: "6",
65429: "7",
65431: "8",
65434: "9",
65451: "+",
65453: "-",
65450: "*",
65455: "/",
65439: "dec",
65421: "enter",
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (
gdk.BUTTON_PRESS_MASK
| gdk.BUTTON_RELEASE_MASK
| gdk.EXPOSURE_MASK
| gdk.KEY_PRESS_MASK
| gdk.KEY_RELEASE_MASK
| gdk.LEAVE_NOTIFY_MASK
| gdk.POINTER_MOTION_MASK
| gdk.POINTER_MOTION_HINT_MASK
)
def __init__(self, figure):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idleID = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect("scroll_event", self.scroll_event)
self.connect("button_press_event", self.button_press_event)
self.connect("button_release_event", self.button_release_event)
self.connect("configure_event", self.configure_event)
self.connect("expose_event", self.expose_event)
self.connect("key_press_event", self.key_press_event)
self.connect("key_release_event", self.key_release_event)
self.connect("motion_notify_event", self.motion_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
def scroll_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction == gdk.SCROLL_UP:
direction = "up"
else:
direction = "down"
FigureCanvasBase.scroll_event(self, x, y, direction)
return False # finish event propagation?
def button_press_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_press_event(self, x, y, event.button)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
key = self._get_key(event)
if _debug:
print "hit", key
FigureCanvasBase.key_press_event(self, key)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
key = self._get_key(event)
if _debug:
print "release", key
FigureCanvasBase.key_release_event(self, key)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y)
return False # finish event propagation?
def _get_key(self, event):
if self.keyvald.has_key(event.keyval):
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
ctrl = event.state & gdk.CONTROL_MASK
shift = event.state & gdk.SHIFT_MASK
return key
def configure_event(self, widget, event):
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches(w / dpi, h / dpi)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates(False)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idleID = 0
return False
if self._idleID == 0:
self._idleID = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max(int(self._pixmap_width * 1.1), width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max(int(self._pixmap_height * 1.1), height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap(self.window, self._pixmap_width, self._pixmap_height)
self._renderer.set_pixmap(self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height(width, height)
self.figure.draw(self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug:
print "FigureCanvasGTK.%s" % fn_name()
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare(w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable(self.style.fg_gc[self.state], self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes["jpg"] = "JPEG"
filetypes["jpeg"] = "JPEG"
filetypes["png"] = "Portable Network Graphics"
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, "jpeg")
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, "png")
def _print_image(self, filename, format):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap(self.window, width, height)
self._renderer.set_pixmap(pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0, width, height)
if is_string_like(filename):
try:
pixbuf.save(filename, format)
except gobject.GError, exc:
error_msg_gtk("Save figure failure:\n%s" % (exc,), parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, "save_to_callback"):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback, format, user_data=filename)
except gobject.GError, exc:
error_msg_gtk("Save figure failure:\n%s" % (exc,), parent=self)
class FigureCanvasGTK (gtk.DrawingArea, FigureCanvasBase):
keyvald = {65507 : 'control',
65505 : 'shift',
65513 : 'alt',
65508 : 'control',
65506 : 'shift',
65514 : 'alt',
65361 : 'left',
65362 : 'up',
65363 : 'right',
65364 : 'down',
}
def __init__(self, figure):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idleID = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect('button_press_event', self.button_press_event)
self.connect('button_release_event', self.button_release_event)
self.connect('configure_event', self.configure_event)
self.connect('expose_event', self.expose_event)
self.connect('key_press_event', self.key_press_event)
self.connect('key_release_event', self.key_release_event)
self.connect('motion_notify_event', self.motion_notify_event)
self.set_events(
gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.EXPOSURE_MASK |
gdk.KEY_PRESS_MASK |
gdk.KEY_RELEASE_MASK |
gdk.LEAVE_NOTIFY_MASK |
gdk.POINTER_MOTION_MASK |
gdk.POINTER_MOTION_HINT_MASK)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
#def resize(self, w, h):
# 'set the drawing area size in pixels'
# winw, winh = self.parent.parent.get_size()
# tmp, tmp, myw, myh = self.allocation
# padw = winw-myw
# padh = winh-myh
# self.parent.parent.resize(w+padw, h+padh)
def button_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_press_event(self, x, y, event.button)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "hit", key
FigureCanvasBase.key_press_event(self, key)
return False # finish event propagation?
def key_release_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
key = self._get_key(event)
if _debug: print "release", key
FigureCanvasBase.key_release_event(self, key)
return False # finish event propagation?
def motion_notify_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y)
return False # finish event propagation?
def _get_key(self, event):
if self.keyvald.has_key(event.keyval):
key = self.keyvald[event.keyval]
elif event.keyval <256:
key = chr(event.keyval)
else:
key = None
ctrl = event.state & gdk.CONTROL_MASK
shift = event.state & gdk.SHIFT_MASK
return key
def configure_event(self, widget, event):
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if widget.window is None:
return
w, h = event.width, event.height
if w<3 or h<3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi.get()
self.figure.set_figsize_inches (w/dpi, h/dpi)
self._need_redraw = True
#self.resize_event()
return False # finish event propagation?
def draw(self):
# synchronous window redraw (like GTK+ 1.2 used to do)
# Note: this does not follow the usual way that GTK redraws,
# which is asynchronous redraw using calls to gtk_widget_queue_draw(),
# which triggers an expose-event
# GTK+ 2.x style draw()
#self._need_redraw = True
#self.queue_draw()
# synchronous draw (needed for animation)
x, y, w, h = self.allocation
if w<3 or h<3: return # empty fig
self._pixmap_prepare (w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
self.window.draw_drawable (self.style.fg_gc[self.state],
self._pixmap, 0, 0, 0, 0, w, h)
def draw_idle(self):
def idle_draw(*args):
self.draw()
self._idleID = 0
return False
if self._idleID==0:
self._idleID = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK (self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max (int (self._pixmap_width * 1.1),
width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max (int (self._pixmap_height * 1.1),
height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap (self.window, self._pixmap_width,
self._pixmap_height)
self._renderer.set_pixmap (self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height (width, height)
self.figure.draw (self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug: print 'FigureCanvasGTK.%s' % fn_name()
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare (w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable (self.style.fg_gc[self.state],
self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
def print_figure(self, filename, dpi=150, facecolor='w', edgecolor='w',
orientation='portrait'):
# TODO - use gdk/cairo/agg print_figure?
root, ext = os.path.splitext(filename)
ext = ext[1:]
if ext == '':
ext = IMAGE_FORMAT_DEFAULT
filename = filename + '.' + ext
# save figure settings
origDPI = self.figure.dpi.get()
origfacecolor = self.figure.get_facecolor()
origedgecolor = self.figure.get_edgecolor()
origWIn, origHIn = self.figure.get_size_inches()
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
self.figure.dpi.set(dpi)
self.figure.set_facecolor(facecolor)
self.figure.set_edgecolor(edgecolor)
ext = ext.lower()
if ext in ('jpg', 'png'): # native printing
width, height = self.get_width_height()
pixmap = gdk.Pixmap (self.window, width, height)
self._renderer.set_pixmap (pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(),
0, 0, 0, 0, width, height)
# pixbuf.save() recognises 'jpeg' not 'jpg'
if ext == 'jpg': ext = 'jpeg'
try:
pixbuf.save(filename, ext)
except gobject.GError, exc:
error_msg_gtk('Save figure failure:\n%s' % (exc,), parent=self)
elif ext in ('eps', 'ps', 'svg',):
if ext == 'svg':
from backend_svg import FigureCanvasSVG as FigureCanvas
else:
from backend_ps import FigureCanvasPS as FigureCanvas
try:
fc = self.switch_backends(FigureCanvas)
fc.print_figure(filename, dpi, facecolor, edgecolor,
orientation)
except IOError, exc:
error_msg_gtk("Save figure failure:\n%s: %s" %
(exc.filename, exc.strerror), parent=self)
class FigureCanvasGTK(gtk.DrawingArea, FigureCanvasBase):
keyvald = {
65507: "control",
65505: "shift",
65513: "alt",
65508: "control",
65506: "shift",
65514: "alt",
65361: "left",
65362: "up",
65363: "right",
65364: "down",
65307: "escape",
65470: "f1",
65471: "f2",
65472: "f3",
65473: "f4",
65474: "f5",
65475: "f6",
65476: "f7",
65477: "f8",
65478: "f9",
65479: "f10",
65480: "f11",
65481: "f12",
65300: "scroll_lock",
65299: "break",
65288: "backspace",
65293: "enter",
65379: "insert",
65535: "delete",
65360: "home",
65367: "end",
65365: "pageup",
65366: "pagedown",
65438: "0",
65436: "1",
65433: "2",
65435: "3",
65430: "4",
65437: "5",
65432: "6",
65429: "7",
65431: "8",
65434: "9",
65451: "+",
65453: "-",
65450: "*",
65455: "/",
65439: "dec",
65421: "enter",
65511: "super",
65512: "super",
65406: "alt",
65289: "tab",
}
# Setting this as a static constant prevents
# this resulting expression from leaking
event_mask = (
gdk.BUTTON_PRESS_MASK
| gdk.BUTTON_RELEASE_MASK
| gdk.EXPOSURE_MASK
| gdk.KEY_PRESS_MASK
| gdk.KEY_RELEASE_MASK
| gdk.ENTER_NOTIFY_MASK
| gdk.LEAVE_NOTIFY_MASK
| gdk.POINTER_MOTION_MASK
| gdk.POINTER_MOTION_HINT_MASK
)
def __init__(self, figure):
if self.__class__ == matplotlib.backends.backend_gtk.FigureCanvasGTK:
warn_deprecated(
"2.0",
message="The GTK backend is "
"deprecated. It is untested, known to be "
"broken and will be removed in Matplotlib 2.2. "
"Use the GTKAgg backend instead. "
"See Matplotlib usage FAQ for"
" more info on backends.",
alternative="GTKAgg",
)
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
FigureCanvasBase.__init__(self, figure)
gtk.DrawingArea.__init__(self)
self._idle_draw_id = 0
self._need_redraw = True
self._pixmap_width = -1
self._pixmap_height = -1
self._lastCursor = None
self.connect("scroll_event", self.scroll_event)
self.connect("button_press_event", self.button_press_event)
self.connect("button_release_event", self.button_release_event)
self.connect("configure_event", self.configure_event)
self.connect("expose_event", self.expose_event)
self.connect("key_press_event", self.key_press_event)
self.connect("key_release_event", self.key_release_event)
self.connect("motion_notify_event", self.motion_notify_event)
self.connect("leave_notify_event", self.leave_notify_event)
self.connect("enter_notify_event", self.enter_notify_event)
self.set_events(self.__class__.event_mask)
self.set_double_buffered(False)
self.set_flags(gtk.CAN_FOCUS)
self._renderer_init()
self.last_downclick = {}
def destroy(self):
# gtk.DrawingArea.destroy(self)
self.close_event()
if self._idle_draw_id != 0:
gobject.source_remove(self._idle_draw_id)
def scroll_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
if event.direction == gdk.SCROLL_UP:
step = 1
else:
step = -1
FigureCanvasBase.scroll_event(self, x, y, step, guiEvent=event)
return False # finish event propagation?
def button_press_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
dblclick = event.type == gdk._2BUTTON_PRESS
if not dblclick:
# GTK is the only backend that generates a DOWN-UP-DOWN-DBLCLICK-UP event
# sequence for a double click. All other backends have a DOWN-UP-DBLCLICK-UP
# sequence. In order to provide consistency to matplotlib users, we will
# eat the extra DOWN event in the case that we detect it is part of a double
# click.
# first, get the double click time in milliseconds.
current_time = event.get_time()
last_time = self.last_downclick.get(event.button, 0)
dblclick_time = gtk.settings_get_for_screen(gdk.screen_get_default()).get_property("gtk-double-click-time")
delta_time = current_time - last_time
if delta_time < dblclick_time:
del self.last_downclick[event.button] # we do not want to eat more than one event.
return False # eat.
self.last_downclick[event.button] = current_time
FigureCanvasBase.button_press_event(self, x, y, event.button, dblclick=dblclick, guiEvent=event)
return False # finish event propagation?
def button_release_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
x = event.x
# flipy so y=0 is bottom of canvas
y = self.allocation.height - event.y
FigureCanvasBase.button_release_event(self, x, y, event.button, guiEvent=event)
return False # finish event propagation?
def key_press_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
key = self._get_key(event)
if _debug:
print("hit", key)
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
return True # stop event propagation
def key_release_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
key = self._get_key(event)
if _debug:
print("release", key)
FigureCanvasBase.key_release_event(self, key, guiEvent=event)
return True # stop event propagation
def motion_notify_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x, y, state = event.x, event.y, event.state
# flipy so y=0 is bottom of canvas
y = self.allocation.height - y
FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=event)
return False # finish event propagation?
def leave_notify_event(self, widget, event):
FigureCanvasBase.leave_notify_event(self, event)
def enter_notify_event(self, widget, event):
x, y, state = event.window.get_pointer()
FigureCanvasBase.enter_notify_event(self, event, xy=(x, y))
def _get_key(self, event):
if event.keyval in self.keyvald:
key = self.keyvald[event.keyval]
elif event.keyval < 256:
key = chr(event.keyval)
else:
key = None
for key_mask, prefix in ([gdk.MOD4_MASK, "super"], [gdk.MOD1_MASK, "alt"], [gdk.CONTROL_MASK, "ctrl"]):
if event.state & key_mask:
key = "{0}+{1}".format(prefix, key)
return key
def configure_event(self, widget, event):
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
if widget.window is None:
return
w, h = event.width, event.height
if w < 3 or h < 3:
return # empty fig
# resize the figure (in inches)
dpi = self.figure.dpi
self.figure.set_size_inches(w / dpi, h / dpi, forward=False)
self._need_redraw = True
return False # finish event propagation?
def draw(self):
# Note: FigureCanvasBase.draw() is inconveniently named as it clashes
# with the deprecated gtk.Widget.draw()
self._need_redraw = True
if GTK_WIDGET_DRAWABLE(self):
self.queue_draw()
# do a synchronous draw (its less efficient than an async draw,
# but is required if/when animation is used)
self.window.process_updates(False)
def draw_idle(self):
if self._idle_draw_id != 0:
return
def idle_draw(*args):
try:
self.draw()
finally:
self._idle_draw_id = 0
return False
self._idle_draw_id = gobject.idle_add(idle_draw)
def _renderer_init(self):
"""Override by GTK backends to select a different renderer
Renderer should provide the methods:
set_pixmap ()
set_width_height ()
that are used by
_render_figure() / _pixmap_prepare()
"""
self._renderer = RendererGDK(self, self.figure.dpi)
def _pixmap_prepare(self, width, height):
"""
Make sure _._pixmap is at least width, height,
create new pixmap if necessary
"""
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
create_pixmap = False
if width > self._pixmap_width:
# increase the pixmap in 10%+ (rather than 1 pixel) steps
self._pixmap_width = max(int(self._pixmap_width * 1.1), width)
create_pixmap = True
if height > self._pixmap_height:
self._pixmap_height = max(int(self._pixmap_height * 1.1), height)
create_pixmap = True
if create_pixmap:
self._pixmap = gdk.Pixmap(self.window, self._pixmap_width, self._pixmap_height)
self._renderer.set_pixmap(self._pixmap)
def _render_figure(self, pixmap, width, height):
"""used by GTK and GTKcairo. GTKAgg overrides
"""
self._renderer.set_width_height(width, height)
self.figure.draw(self._renderer)
def expose_event(self, widget, event):
"""Expose_event for all GTK backends. Should not be overridden.
"""
if _debug:
print("FigureCanvasGTK.%s" % fn_name())
if GTK_WIDGET_DRAWABLE(self):
if self._need_redraw:
x, y, w, h = self.allocation
self._pixmap_prepare(w, h)
self._render_figure(self._pixmap, w, h)
self._need_redraw = False
x, y, w, h = event.area
self.window.draw_drawable(self.style.fg_gc[self.state], self._pixmap, x, y, x, y, w, h)
return False # finish event propagation?
filetypes = FigureCanvasBase.filetypes.copy()
filetypes["jpg"] = "JPEG"
filetypes["jpeg"] = "JPEG"
filetypes["png"] = "Portable Network Graphics"
def print_jpeg(self, filename, *args, **kwargs):
return self._print_image(filename, "jpeg")
print_jpg = print_jpeg
def print_png(self, filename, *args, **kwargs):
return self._print_image(filename, "png")
def _print_image(self, filename, format, *args, **kwargs):
if self.flags() & gtk.REALIZED == 0:
# for self.window(for pixmap) and has a side effect of altering
# figure width,height (via configure-event?)
gtk.DrawingArea.realize(self)
width, height = self.get_width_height()
pixmap = gdk.Pixmap(self.window, width, height)
self._renderer.set_pixmap(pixmap)
self._render_figure(pixmap, width, height)
# jpg colors don't match the display very well, png colors match
# better
pixbuf = gdk.Pixbuf(gdk.COLORSPACE_RGB, 0, 8, width, height)
pixbuf.get_from_drawable(pixmap, pixmap.get_colormap(), 0, 0, 0, 0, width, height)
# set the default quality, if we are writing a JPEG.
# http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html#method-gdkpixbuf--save
options = cbook.restrict_dict(kwargs, ["quality"])
if format in ["jpg", "jpeg"]:
if "quality" not in options:
options["quality"] = rcParams["savefig.jpeg_quality"]
options["quality"] = str(options["quality"])
if is_string_like(filename):
try:
pixbuf.save(filename, format, options=options)
except gobject.GError as exc:
error_msg_gtk("Save figure failure:\n%s" % (exc,), parent=self)
elif is_writable_file_like(filename):
if hasattr(pixbuf, "save_to_callback"):
def save_callback(buf, data=None):
data.write(buf)
try:
pixbuf.save_to_callback(save_callback, format, user_data=filename, options=options)
except gobject.GError as exc:
error_msg_gtk("Save figure failure:\n%s" % (exc,), parent=self)
else:
raise ValueError("Saving to a Python file-like object is only supported by PyGTK >= 2.8")
else:
raise ValueError("filename must be a path or a file-like object")
def new_timer(self, *args, **kwargs):
"""
Creates a new backend-specific subclass of :class:`backend_bases.Timer`.
This is useful for getting periodic events through the backend's native
event loop. Implemented only for backends with GUIs.
Other Parameters
----------------
interval : scalar
Timer interval in milliseconds
callbacks : list
Sequence of (func, args, kwargs) where ``func(*args, **kwargs)``
will be executed by the timer every *interval*.
"""
return TimerGTK(*args, **kwargs)
def flush_events(self):
gtk.gdk.threads_enter()
while gtk.events_pending():
gtk.main_iteration(True)
gtk.gdk.flush()
gtk.gdk.threads_leave()
def start_event_loop(self, timeout):
FigureCanvasBase.start_event_loop_default(self, timeout)
start_event_loop.__doc__ = FigureCanvasBase.start_event_loop_default.__doc__
def stop_event_loop(self):
FigureCanvasBase.stop_event_loop_default(self)
stop_event_loop.__doc__ = FigureCanvasBase.stop_event_loop_default.__doc__