QDockWidget white after move it



  • Hello!
    I use qt-5.5.1 x64.
    For output images I use QOpenGLWidget subclass on QDockWidget.
    After start application I see correct image on QDockWidget, but if I move it - I see only white space.
    How can I solve this problem.
    Thank you and excuse my bad english.



  • @debian

    -->> After start application I see correct image on QDockWidget, but if I move it - I see only white space.
    but if i remove means removing image from Dockwidget or total Dock from GUI?

                  What you are expecting to there after removing image from QDockWidget? 
                  Try this: If you are using QOpenGLWidget, you can set the background color using this 
                   f->glClearColor(0.0f, 0.0f, 0.0f, 0.0f); //gives you black 
    

    If it only image, you can use Qpainter instead of QOpenGLWidget.



  • @N.Sumi
    Thank you for your reply!
    Unfortunately I can't use QPainter because it very slow.


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