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  1. Qt
  2. QTBUG-121181

Main window blinks when adding QWebEngineView into a layout

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    Description

      This is a regression since Qt 6.3.2.

      If I create main window initially (with a raster surface by default) and later QWebEngineView is added into any layout, the main window is hidden for a short period of time. This happens only once: if I create the first QWebEngineView. The main window is not hidden anymore if other instances of QWebEngineView are created.

      After some investigation I found that it happens when a widget with OpenGL surface is reparented into a main window with a raster surface. In this case the surface type changes and resources of the main window are destroyed and recreated.

      The sample code is attached: webengine-bug.cpp

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          Bug - A problem which impairs or prevents the functions of the product. QTBUG-120544 Main window will be resized after set parent for QWebEngineView

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported
          For Gerrit Dashboard: QTBUG-121181
          # Subject Branch Project Status CR V
          541664,25 widgets: Use per-surface-format RHI support and compositor dev qt/qtbase Status: NEW 0 -1
          544021,8 widgets: Use per-surface-format RHI support and compositor tqtc/lts-6.5 qt/tqtc-qtbase Status: NEW 0 0

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              vestbo Tor Arne Vestbø
              eaverin Evgeny Averin
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