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  1. Qt
  2. QTBUG-60822

[REG: 4->5] WA_TranslucentBackground cannot be changed after widget has been shown

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Details

    • Linux/X11, Windows

    Description

      To reproduce, run attached example on Linux (issue is not limited to Linux though) and wait. Translucent background should be set, but it keeps old setting. QWidgetPrivate::updateIsTranslucent() only sets requested format for the window, but that is not used until window would be recreated (destroy();create();show();).

      Attachments

        1. qtbug60822.zip
          1.0 kB
          Joni Poikelin
        2. qtbug60822.zip
          2 kB
          Friedemann Kleint

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-75101 When a window is has a transparent background then it will not be rendered correctly and will be rendered black instead

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-85714 QOpenGLWidget with NativeWindow QDockWidget does not render when undocked

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; Flaky tests; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTBUG-60822
          # Subject Branch Project Status CR V
          265947,7 Update visible window's alpha when toggling WA_TranslucentBackground 5.12 qt/qtbase Status: MERGED +2 0
          312748,2 Windows QPA: Enable toggling Windows transparency dev qt/qtbase Status: MERGED +2 0
          312937,2 Windows QPA: Enable toggling Windows transparency 5.15 qt/qtbase Status: MERGED +2 0
          353790,2 Document that WA_TranslucentBackground will not have an effect dev qt/qtbase Status: MERGED +2 0
          354203,2 Document that WA_TranslucentBackground will not have an effect 6.2 qt/qtbase Status: MERGED +2 0
          354204,2 Document that WA_TranslucentBackground will not have an effect 6.1 qt/qtbase Status: MERGED +2 0

          Activity

            People

              liaqi Liang Qi
              poikelin Joni Poikelin
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              Dates

                Created:
                Updated:
                Resolved: