QGraphics scence

I have trouble using the QgraphicsScene in Qt.

When I am initializing the QGr开发者_开发问答aphicsScene in the main.cpp i am able to use that. But when I am try to add that to an Widget & then add that to the main window its not working, I am not able to view anything. What is the problem?

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You should put the QGraphicsScene in a QGraphicsView. Then put the QGraphicsView in your widget.