correct event for lose focus in a QGLWidget window

[john_god]

Thnks for your example talk2amulya, I get the picture.
Also I've been reading Qt4 book and the solution is easier than the event filter, I implemente the event function and compare the event type to WindowDeactivate event, like this:

bool GLGraph3D::event(QEvent *event)
{
 
    if (event->type() == QEvent::WindowDeactivate)
    {
        if (TimerRotate != 0)
        {
            killTimer(TimerRotate);
            TimerRotate = 0;
        }
    }
 
    return QWidget::event(event);
}

bool GLGraph3D::event(QEvent *event)
{

    if (event->type() == QEvent::WindowDeactivate)
    {
        if (TimerRotate != 0)
        {
            killTimer(TimerRotate);
            TimerRotate = 0;
        }
    }

    return QWidget::event(event);
}

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It Works !!!!!!!!!!!!!!!!!!!!