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Thread: QGraphicsView - how to disable mouse and keyboard scrolling

  1. #1
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    Default QGraphicsView - how to disable mouse and keyboard scrolling

    In my application I have QGraphicsScene with pixmap added and all is viewed in QGraphicsView with scrollbars off.
    The program window is smaller then pixmap and when I press arrow keys or move mouse wheel the pixmap is being moved.

    How do I disable that so even if the pixmap is bigger than window it won't be moved by keyboard or mouse unless I use my events for that?

    (I tried to set interactive property to false but that didn't work)

  2. #2
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    Default Re: QGraphicsView - how to disable mouse and keyboard scrolling

    I believe the easiest solution would be to set FocusPolicy of QGraphicsView to NoFocus and then process all key events in main window.

    Qt Code:
    1. ui->graphicsView->setFocusPolicy( Qt::NoFocus );
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  3. #3

    Default Re: QGraphicsView - how to disable mouse and keyboard scrolling

    mouse wheel events still go thru tho
    Last edited by user14921; 9th March 2010 at 10:40.

  4. #4
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    Default Re: QGraphicsView - how to disable mouse and keyboard scrolling

    use eventFilter() and filter the mouse events ...

    Qt Code:
    1. bool myGraphicsView:: eventFilter(QObject *ob, QEvent *e)
    2. {
    3. if(ob == item_need_filter && e->type() == QEvent::MousePress /**any event u want to filter**/) {
    4. .......
    5. }
    6. return true;
    7. }
    8. return QWidget::eventFilter(ob, e);
    9. }
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