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  1. Qt
  2. QTBUG-51914

Make Widgets update/repaint use QWindow::requestUpdate()

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Details

    • Task
    • Resolution: Unresolved
    • P4: Low
    • None
    • None
    • Widgets: Widgets and Dialogs
    • None

    Description

      Currently QWidgetBackingStore::UpdateLater behavior is implemented posting an UpdateRequest event to the event loop, which is then serviced during the next round of event processing. See QWidgetBackingStore::sendUpdateRequest() and QEvent::UpdateRequest handling in qwidget.cpp

      It is desirable to let the platform plugin drive such updates instead. This would for example allow driving animations with CVDisplayLinks on OS X.

      We have an API for this already: QWindow::requestUpdate(), where the default behavior uses the event loop like Widgets does today. Remaining task is to switch Widgets over to using that.

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          is required for

          Task - A task that needs to be done. QTBUG-49859 OS X: Unified Expose and Update events via CVDisplayLink/drawRect

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

          Task - A task that needs to be done. QTBUG-66964 RasterSurface to Metal layer rendering

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

              vestbo Tor Arne Vestbø
              sorvig Morten Sørvig
              Veli-Pekka Heinonen Veli-Pekka Heinonen
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                Updated:

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