def plotContourFills(self, painter, posn, axes, clip):
"""Plot the traced contours on the painter."""
s = self.settings
# don't draw if there are no cached polygons
if self._cachedpolygons is None or s.Fills.hide:
return
# iterate over each level, and list of lines
for num, polylist in enumerate(self._cachedpolygons):
# iterate over each complete line of the contour
path = qt4.QPainterPath()
for poly in polylist:
# convert coordinates from graph to plotter
xplt = axes[0].dataToPlotterCoords(posn, poly[:,0])
yplt = axes[1].dataToPlotterCoords(posn, poly[:,1])
pts = qt4.QPolygonF()
utils.addNumpyToPolygonF(pts, xplt, yplt)
clippedpoly = qt4.QPolygonF()
utils.polygonClip(pts, clip, clippedpoly)
path.addPolygon(clippedpoly)
# fill polygons
brush = s.Fills.get('fills').returnBrushExtended(num)
utils.brushExtFillPath(painter, brush, path)
def areaDrawStacked(self, painter, posns, maxwidth, dsvals,
axes, widgetposn, clip):
"""Draw a stacked area plot"""
s = self.settings
# get axis which values are plotted along
ishorz = s.direction == 'horizontal'
vaxis = axes[not ishorz]
# compute stacked coordinates
stackedvals, stackedcoords = self.calcStackedPoints(
dsvals, vaxis, widgetposn)
# coordinates of origin
zerocoords = vaxis.dataToPlotterCoords(widgetposn, N.zeros(posns.shape))
# draw areas (reverse order, so edges are plotted correctly)
for dsnum, coords in izip( xrange(len(stackedcoords)-1, -1, -1),
stackedcoords[::-1]):
# add points at end to make polygon
p1 = N.hstack( [ [zerocoords[0]], coords, [zerocoords[-1]] ] )
p2 = N.hstack( [ [posns[0]], posns, [posns[-1]] ] )
# construct polygon on path, clipped
poly = qt4.QPolygonF()
if ishorz:
utils.addNumpyToPolygonF(poly, p1, p2)
else:
utils.addNumpyToPolygonF(poly, p2, p1)
clippoly = qt4.QPolygonF()
utils.polygonClip(poly, clip, clippoly)
path = qt4.QPainterPath()
path.addPolygon(clippoly)
path.closeSubpath()
# actually draw polygon
brush = s.BarFill.get('fills').returnBrushExtended(dsnum)
utils.brushExtFillPath(painter, brush, path)
# now draw lines
poly = qt4.QPolygonF()
if ishorz:
utils.addNumpyToPolygonF(poly, coords, posns)
else:
utils.addNumpyToPolygonF(poly, posns, coords)
pen = s.BarLine.get('lines').makePen(painter, dsnum)
painter.setPen(pen)
utils.plotClippedPolyline(painter, clip, poly)
# draw error bars
barwidth = maxwidth * s.barfill
for barval, dsval in izip(stackedvals, dsvals):
self.drawErrorBars(painter, posns, barwidth,
barval, dsval,
axes, widgetposn)
def areaDrawStacked(self, painter, posns, maxwidth, dsvals, axes,
widgetposn, clip):
"""Draw a stacked area plot"""
s = self.settings
# get axis which values are plotted along
ishorz = s.direction == 'horizontal'
vaxis = axes[not ishorz]
# compute stacked coordinates
stackedvals, stackedcoords = self.calcStackedPoints(
dsvals, vaxis, widgetposn)
# coordinates of origin
zerocoords = vaxis.dataToPlotterCoords(widgetposn,
N.zeros(posns.shape))
# draw areas (reverse order, so edges are plotted correctly)
for dsnum, coords in izip(xrange(len(stackedcoords) - 1, -1, -1),
stackedcoords[::-1]):
# add points at end to make polygon
p1 = N.hstack([[zerocoords[0]], coords, [zerocoords[-1]]])
p2 = N.hstack([[posns[0]], posns, [posns[-1]]])
# construct polygon on path, clipped
poly = qt4.QPolygonF()
if ishorz:
utils.addNumpyToPolygonF(poly, p1, p2)
else:
utils.addNumpyToPolygonF(poly, p2, p1)
clippoly = qt4.QPolygonF()
utils.polygonClip(poly, clip, clippoly)
path = qt4.QPainterPath()
path.addPolygon(clippoly)
path.closeSubpath()
# actually draw polygon
brush = s.BarFill.get('fills').returnBrushExtended(dsnum)
utils.brushExtFillPath(painter, brush, path)
# now draw lines
poly = qt4.QPolygonF()
if ishorz:
utils.addNumpyToPolygonF(poly, coords, posns)
else:
utils.addNumpyToPolygonF(poly, posns, coords)
pen = s.BarLine.get('lines').makePen(painter, dsnum)
painter.setPen(pen)
utils.plotClippedPolyline(painter, clip, poly)
# draw error bars
barwidth = maxwidth * s.barfill
for barval, dsval in izip(stackedvals, dsvals):
self.drawErrorBars(painter, posns, barwidth, barval, dsval, axes,
widgetposn)
def _fillRegion(self, painter, pxpts, pypts, bounds, belowleft, clip,
brush):
"""Fill the region above/below or left/right of the points.
belowleft fills below if the variable is 'x', or left if 'y'
otherwise it fills above/right."""
# find starting and ending points for the filled region
x1, y1, x2, y2 = bounds
# trimming can lead to too few points
if len(pxpts) < 2 or len(pypts) < 2:
return
pts = qt4.QPolygonF()
if self.settings.variable == 'x':
if belowleft:
pts.append(qt4.QPointF(pxpts[0], y2))
endpt = qt4.QPointF(pxpts[-1], y2)
else:
pts.append(qt4.QPointF(pxpts[0], y1))
endpt = qt4.QPointF(pxpts[-1], y1)
else:
if belowleft:
pts.append(qt4.QPointF(x1, pypts[0]))
endpt = qt4.QPointF(x1, pypts[-1])
else:
pts.append(qt4.QPointF(x2, pypts[0]))
endpt = qt4.QPointF(x2, pypts[-1])
# add the points between
utils.addNumpyToPolygonF(pts, pxpts, pypts)
# stick on the ending point
pts.append(endpt)
# draw the clipped polygon
clipped = qt4.QPolygonF()
utils.polygonClip(pts, clip, clipped)
path = qt4.QPainterPath()
path.addPolygon(clipped)
utils.brushExtFillPath(painter, brush, path)
def _fillRegion(self, painter, pxpts, pypts, bounds, belowleft, clip,
brush):
"""Fill the region above/below or left/right of the points.
belowleft fills below if the variable is 'x', or left if 'y'
otherwise it fills above/right."""
# find starting and ending points for the filled region
x1, y1, x2, y2 = bounds
pts = qt4.QPolygonF()
if self.settings.variable == 'x':
if belowleft:
pts.append(qt4.QPointF(pxpts[0], y2))
endpt = qt4.QPointF(pxpts[-1], y2)
else:
pts.append(qt4.QPointF(pxpts[0], y1))
endpt = qt4.QPointF(pxpts[-1], y1)
else:
if belowleft:
pts.append(qt4.QPointF(x1, pypts[0]))
endpt = qt4.QPointF(x1, pypts[-1])
else:
pts.append(qt4.QPointF(x2, pypts[0]))
endpt = qt4.QPointF(x2, pypts[-1])
# add the points between
utils.addNumpyToPolygonF(pts, pxpts, pypts)
# stick on the ending point
pts.append(endpt)
# draw the clipped polygon
clipped = qt4.QPolygonF()
utils.polygonClip(pts, clip, clipped)
path = qt4.QPainterPath()
path.addPolygon(clipped)
utils.brushExtFillPath(painter, brush, path)
def draw(self, posn, phelper, outerbounds=None):
"""Plot the data on a plotter."""
s = self.settings
# exit if hidden
if s.hide:
return
# get points in plotter coordinates
xp, yp = self._getPlotterCoords(posn)
if xp is None or yp is None:
# we can't calculate coordinates
return
x1, y1, x2, y2 = posn
cliprect = qt4.QRectF( qt4.QPointF(x1, y1), qt4.QPointF(x2, y2) )
painter = phelper.painter(self, posn, clip=cliprect)
pen = s.Line.makeQPenWHide(painter)
pw = pen.widthF()*2
lineclip = qt4.QRectF( qt4.QPointF(x1-pw, y1-pw),
qt4.QPointF(x2+pw, y2+pw) )
# this is a hack as we generate temporary fake datasets
path = qt4.QPainterPath()
for xvals, yvals in document.generateValidDatasetParts(
document.Dataset(xp), document.Dataset(yp)):
poly = qt4.QPolygonF()
utils.addNumpyToPolygonF(poly, xvals.data, yvals.data)
clippedpoly = qt4.QPolygonF()
utils.polygonClip(poly, lineclip, clippedpoly)
path.addPolygon(clippedpoly)
path.closeSubpath()
utils.brushExtFillPath(painter, s.Fill, path, stroke=pen)
def draw(self, posn, phelper, outerbounds=None):
"""Plot the data on a plotter."""
s = self.settings
# exit if hidden
if s.hide:
return
# get points in plotter coordinates
xp, yp = self._getPlotterCoords(posn)
if xp is None or yp is None:
# we can't calculate coordinates
return
x1, y1, x2, y2 = posn
cliprect = qt4.QRectF(qt4.QPointF(x1, y1), qt4.QPointF(x2, y2))
painter = phelper.painter(self, posn, clip=cliprect)
pen = s.Line.makeQPenWHide(painter)
pw = pen.widthF() * 2
lineclip = qt4.QRectF(qt4.QPointF(x1 - pw, y1 - pw),
qt4.QPointF(x2 + pw, y2 + pw))
# this is a hack as we generate temporary fake datasets
path = qt4.QPainterPath()
for xvals, yvals in document.generateValidDatasetParts(
document.Dataset(xp), document.Dataset(yp)):
poly = qt4.QPolygonF()
utils.addNumpyToPolygonF(poly, xvals.data, yvals.data)
clippedpoly = qt4.QPolygonF()
utils.polygonClip(poly, lineclip, clippedpoly)
path.addPolygon(clippedpoly)
path.closeSubpath()
utils.brushExtFillPath(painter, s.Fill, path, stroke=pen)