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overlapping of widgets in Qt
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I have a mainWidget with gray background color . I'd like to place a transparent image on the mainWidget，which is like send a translucent picture on top of another picture. If I use a child QLabel widget that is the same size as the parent mainWidget to present the image , the content of mainWindow is not visible. How I can achieve that?
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You can set the background color/image of a widget but widgets can not 'overlap'. See e.g. https://forum.qt.io/topic/1378/is-it-possible-to-set-a-background-image-to-a-widget
