qtrend.py 文件源码

def renderEdge(self, eid, einfo, points):
        scene = self.scene()

        # If we have been drawn already, get rid of it.
        gproxy = einfo.get('gproxy')
        if gproxy:
            scene.removeItem(gproxy)

        qpoints = [QtCore.QPointF(x, y) for (x, y) in points]
        qpoly = QtGui.QPolygonF(qpoints)

        ecolor = self._vg_graph.getMeta('edgecolor', '#000')
        ecolor = einfo.get('color', ecolor)

        pen = QtGui.QPen(QtGui.QColor(ecolor))
        gproxy = self.scene().addPolygon(qpoly, pen=pen)
        gproxy.setZValue(-1.0)

        einfo['gproxy'] = gproxy