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import pyqtgraph as pg
class FillBetweenItem(pg.QtGui.QGraphicsPathItem):
"""
GraphicsItem filling the space between two PlotDataItems.
"""
def __init__(self, p1, p2, brush=None):
pg.QtGui.QGraphicsPathItem.__init__(self)
self.p1 = p1
self.p2 = p2
p1.sigPlotChanged.connect(self.updatePath)
p2.sigPlotChanged.connect(self.updatePath)
if brush is not None:
self.setBrush(pg.mkBrush(brush))
self.setZValue(min(p1.zValue(), p2.zValue())-1)
self.updatePath()
def updatePath(self):
p1 = self.p1.curve.path
p2 = self.p2.curve.path
path = pg.QtGui.QPainterPath()
path.addPolygon(p1.toSubpathPolygons()[0] + p2.toReversed().toSubpathPolygons()[0])
self.setPath(path)
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