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    QGraphicsView performance problem

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    • Y
      yuazhen last edited by

      Hi Forums,
      There are a lot of items in the QGraphicsScene has been set to a QGraphicsView which uses a QGLWidget as the viewport. When update one of item in the scene, it will takes a lot of time to re-paint all of items in the scene even their contents are staying un-changed. It can lower down the framerate. How can I get the higher performance with this kind of scene? Can anybody help me?

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      • R
        rokemoon last edited by

        You can have a look this presentation from DevDays 2010 about Graphics Framework.
        Here they are: "1":http://developer.qt.nokia.com/videos/watch/performance_do_graphics_the_right_way "2":http://developer.qt.nokia.com/videos/watch/qt_graphicsview_in_depth
        In this presentation says about some tip and tricks of graphics view framework.

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        • Y
          yuazhen last edited by

          [quote author="rokemoon" date="1320830557"]You can have a look this presentation from DevDays 2010 about Graphics Framework.
          Here they are: "1":http://developer.qt.nokia.com/videos/watch/performance_do_graphics_the_right_way "2":http://developer.qt.nokia.com/videos/watch/qt_graphicsview_in_depth
          In this presentation says about some tip and tricks of graphics view framework.[/quote]
          Thanks for your advice.

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          • R
            rokemoon last edited by

            Always welcome.

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