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  1. Qt
  2. QTBUG-46634

QOpenGLWidget causes flicker when resizing parent window

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Details

    • Bug
    • Resolution: Unresolved
    • P2: Important
    • None
    • 5.4.2, 5.5.0, 5.9.0 Beta 1, 5.9.7, 5.9.8, 5.13.0, 6.4.2
    • GUI: OpenGL, Widgets: Main Window
    • Windows 8.1 x64 Pro
      Qt 5.4.2 built with VS2013 x64
      CPU: Intel core i5 3570
      Graphics: the one integrated with the processor
      RAM: 16 GB

    Description

      Putting a QOpenGLWidget inside a QMainWindow as a child causes really noticeable and annoying flicker when re-sizing the QMainWindow through the handles at the borders/corners.

      I thought I was missing something in my program, so I just tried out the included "2D Painting on Native and OpenGL Widgets" which comes with Qt, but the problem is there too.
      If you comment out lines 55, 63 and 70 of "window.cpp" in that example, the flicker completely disappears.

      Attachments

        1. native.avi
          7.91 MB
        2. open_GL.avi
          7.17 MB
        3. qtdiag.txt
          4 kB
        4. IMG_0311.jpg
          IMG_0311.jpg
          244 kB
        5. IMG_0336.jpg
          IMG_0336.jpg
          289 kB
        6. main.cpp
          0.5 kB
        7. qopenglwidget.mov
          7.36 MB
        8. qtquickdesigner.mp4
          1.90 MB

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-41381 Window resizing utterly broken

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-77032 Application window flickers if it has QOpenGLWidget child

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-23064 4.10.1 OSX Window behavior

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

          Activity

            People

              lagocs Laszlo Agocs
              jubba Claudio Barutta
              Votes:
              6 Vote for this issue
              Watchers:
              15 Start watching this issue

              Dates

                Created:
                Updated: