GraphicsScene.py 文件源码

def registerObject(cls, obj):
        """
        Workaround for PyQt bug in qgraphicsscene.items()
        All subclasses of QGraphicsObject must register themselves with this function.
        (otherwise, mouse interaction with those objects will likely fail)
        """
        if HAVE_SIP and isinstance(obj, sip.wrapper):
            cls._addressCache[sip.unwrapinstance(sip.cast(obj, QtGui.QGraphicsItem))] = obj