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  1. Qt
  2. QTBUG-49828

Big flickering on frameless Window resizing (regression on OSX)

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Details

    • macOS

    Description

      See attached sample.
      Run it. Resize the window from any border (make the window big enough). Observe the extreme flickering, caused by the window being transparent a short time at each resizing event... amateurish feeling
      This problem is caused by this change: https://codereview.qt-project.org/#/c/108362
      Revert this change (remove the 2 lines) and the problem is completely solved.

      I use a QDockWidget for the sake of simplicity, to be able to resize the window easily. But this is not a QDockWidget problem and the same happens with any frameless widget (eg. menu)

      Related story https://bugreports.qt.io/browse/QTBUG-47354

      I did not try 5.6, but the code is the same, hence I guess 5.6 is also affected.

      Attachments

        1. main.cpp
          0.4 kB
          user-04d21

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47354 OSX: Regression introduced by the fix for QTBUG-44313: dialog flickers during resize if it calls setGeometry() in resizeEvent handler

          • 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; 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
          is replaced by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47354 OSX: Regression introduced by the fix for QTBUG-44313: dialog flickers during resize if it calls setGeometry() in resizeEvent handler

          • 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; 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
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              sorvig Morten Sørvig
              jirauser26727 user-04d21 (Inactive)
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                Created:
                Updated:
                Resolved:

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