Hello,

I am trying to reimplement the colliding mouse example.
Everything is the same except
QMainWindow is used.
I used the timer event to set new random position on the scene.
So far so good, I can see my QGraphicsItem on the scene.
However, the problem is that is not moving..and sometimes parts of the item on the scene will start disappearing. And I can actually 'see the item moving' or moved to a new location if I keep resizing my window or I have a scene->update() command.

Anybody has any idea why ?

Thanks !