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  1. Qt
  2. QTBUG-66136

QWidget::show() invalidates font inheritance under certain circumstances

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 5.10.0
    • GUI: Font handling
    • None
    • Tested Qt versions:
      Linux (x86, 32bit): Qt 5.10.0, Qt 4.8.7
      Windows (7, 64bit): Qt 5.2.1, Qt 4.8.5 (can't upgrade)

      I noticed several issues with the fonts in my application(s) and finally tracked this down to the attached example code (after a long time !).
      It looks like font inheritance gets broken by QWidget->show() under at least the following circumstances:

      • application font set
      • gui style set
      • QWidget::show() called late

      The attached example should be self-explaining and a good starting point.
      I also assume that at least two bugs are involved (see comments).

      Seems to occure on Linux + Qt5 only, Windows + Qt5 works fine and Qt4 also works fine on both platforms.

        1. main.cpp
          3 kB
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            esabraha Eskil Abrahamsen Blomfeldt
            comer352l comer352l
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              Created:
              Updated:

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