dendogram.py 文件源码

def adjust(self):
        if not self.source() or not self.dest():
            return

        line = QtCore.QLineF(self.mapFromItem(self.source(), 0, 0), self.mapFromItem(self.dest(), 0, 0))
        length = line.length()

        if length == 0.0:
            return

        edgeOffset = QtCore.QPointF((line.dx() * 10) / length, (line.dy() * 10) / length)

        self.prepareGeometryChange()
        self.sourcePoint = line.p1() + edgeOffset
        self.destPoint = line.p2() - edgeOffset