CODEWITHSUNDEEP
qtqgraphicsview
user1312748
user1312748

Reputation:

Why QGraphicsScene::advance() doesn't repaint my item?

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.

Upvotes: 1

Views: 1776

Answers (2)

Johannes S.
Johannes S.

Reputation: 4626

Similar to this (QGraphicsScene is missing a particular item update), you simply invalidate the are of your object in the scene and let the scene take care of updating.

Upvotes: 1

cmannett85
cmannett85

Reputation: 22366

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.

Upvotes: 1

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