QGraphicsView framework performance

[saifulkhan]

Dear All,

I am using qt 5.0.1 in windows. I am creating 200k+ custom QGraphicsItem. I have added basic functionalists in these custom items, like mouse hover, mouse click etc.. This items are static. But on top of these items I add some items (200 max) which animates (different property animation, scale, opacity etc).
When I add those items in the scene it become extremely slow, in a relatively powerful workstation.

QGraphicsScene *scene = new QGraphicsScene();
    scene->setSceneRect(0, 0, width, height);
    scene->setBackgroundBrush(Qt::darkGray);
    scene->setItemIndexMethod(QGraphicsScene::NoIndex);
 
    QGraphicsView *view = new QGraphicsView( scene );
    view->setRenderHint(QPainter::Antialiasing, false);
    view->setResizeAnchor(QGraphicsView::AnchorViewCenter);
    view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    view->resize( width, height );
    view->setOptimizationFlags(QGraphicsView::DontSavePainterState);
    view->setViewportUpdateMode( QGraphicsView::SmartViewportUpdate);
    view->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
    view->setCacheMode(QGraphicsView::CacheBackground);
    view->setViewportUpdateMode( QGraphicsView::FullViewportUpdate);
    view->show();

QGraphicsScene *scene = new QGraphicsScene();
    scene->setSceneRect(0, 0, width, height);
    scene->setBackgroundBrush(Qt::darkGray);
    scene->setItemIndexMethod(QGraphicsScene::NoIndex);

    QGraphicsView *view = new QGraphicsView( scene );
    view->setRenderHint(QPainter::Antialiasing, false);
    view->setResizeAnchor(QGraphicsView::AnchorViewCenter);
    view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    view->resize( width, height );
    view->setOptimizationFlags(QGraphicsView::DontSavePainterState);
    view->setViewportUpdateMode( QGraphicsView::SmartViewportUpdate);
    view->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
    view->setCacheMode(QGraphicsView::CacheBackground);
    view->setViewportUpdateMode( QGraphicsView::FullViewportUpdate);
    view->show();

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I have tried the following, but it makes the rendered view extremely bad, as it seems to enable antialiasing, but I need some pixel label precision.

view->setViewport(new QGLWidget( QGLFormat()));

view->setViewport(new QGLWidget( QGLFormat()));

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Am I missing some important Qt programming tricks? Please suggest. I can post the code, or explain more if in case please let me know. Thanks in advance.