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How to properly use QPainter in custom Widgets (inherits from QWidget).

  • I'm on the way to create my interpretation of Nassi-Shneiderman diagram.
    It's like my "exam" what i choose to myself to prove that i learned at least basics of Qt programming.
    Nassi-Shneiderman diagram looks like follows:

    And i've got little problem:
    When i use QPainter to draw lines for multiple choise statement for example, i cannot force drawed lines stick to top corners and middle of bottom of widget, while i resizing the widget.

    Probably the way to solve that problem is use Widget Resize Event, but how to do that properly? Or here is a better way to solve that problem?

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