def renewplot(self):
""" Do not layout anything, but redraw all lines"""
scene = self.graphicsView.scene()
self.roots = set()
# scene.changed.disconnect(self.renewplot)
for i in self.qLines:
scene.removeItem(i)
self.qLines = []
for edge in self.gv.edges_iter():
qnode1 = self.nodesToQNodes[edge[0]]
qnode2 = self.nodesToQNodes[edge[1]]
line = QLineF(qnode1.pos(), qnode2.pos())
line.setLength(line.length() - 40)
end = line.p2()
arrowLine1 = QLineF()
arrowLine1.setP1(end)
arrowLine1.setLength(10)
arrowLine1.setAngle(line.angle() + 210)
arrowLine2 = QLineF()
arrowLine2.setP1(end)
arrowLine2.setLength(10)
arrowLine2.setAngle(line.angle() - 210)
if edge.attr['color'] not in self.qpens:
self.qpens[edge.attr['color']] = QPen(
QColor(edge.attr['color']))
item = scene.addLine(line, self.qpens[edge.attr['color']])
item.setZValue(-1)
item.setFlag(QGraphicsItem.ItemIsSelectable, True)
self.qLines.append(item)
item = scene.addLine(arrowLine1, self.qpens[edge.attr['color']])
self.qLines.append(item)
item = scene.addLine(arrowLine2, self.qpens[edge.attr['color']])
self.qLines.append(item)
self.roots.add(edge[0])
