Question

I’m trying to move a sprite in a QGraphicsView. I use :

connect(timer, SIGNAL(timeout()), scene, SLOT(advance()));
timer->start(1000/33);

But my sprite is not repainted. I’ve to do alt-tab to update the view.

Answer 1

in the first phase, all items are notified that the scene is about to change, and in the second phase all items are notified that they can move.

The docs imply that this is an animation notification tool for scene items, it says nothing about actually updating the view. You probably need to connect your QTimer::timeout() signal to the QGraphicsScene::update() slot.