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並前往http://www.ostack.cn/?qa=848771/python-pyqt-add-rectangle-in-qgraphicsscene

python - pyqt add rectangle in Qgraphicsscene - OStack Q&A ...

First of all a QGraphicsItem is not a QWidget, so it has those events and does not handle them directly, that's what QGraphicsView and QGraphicsScene do.

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