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Rendering issue of QPainter drawText method

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  • H Offline
    H Offline
    HENIUS
    wrote on last edited by
    #1

    I'm using QPainter and drawText method to draw text. Sometimes appears weird text rendering issue. I cannot find out any dependencies. It's interesting that only some letters are deformed. Have anyone ever noticed such problems before?

    Look at inscription at the bottom of the picture.

    !https://drive.google.com/file/d/0Bz-6ze41OtiVR3o1UkhRZ3U0em8/view?usp=sharing()!

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      Are you using the same font for all drawing ? Is it the same string that use to draw both texts (the one that seem to be similar) ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • S Offline
        S Offline
        skozbial
        wrote on last edited by
        #3

        Are you drawing this text in QWidget or QGraphicsItem? I suppose that you are reimplementing some protected function. Which one?

        QWidget documentation: painting using a QPainter can only take place in a paintEvent() or a function called by a paintEvent()

        You should consider whether to use dedicated classes for drawing text like QLabel or QGraphicsSimpleTextItem.

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