QGraphicsItem and QKeyEvent problem

[nearlyNERD]

Does anyone have an idea how to fix that?

[nearlyNERD]

Can Somebody Help?

[Lykurg]

Since your code is confusing me just install an event filter on your application and see who gets the key event.
If you don't have any mouse interaction in your view I would set the noFocus policy to the view. if it is your only widget, then the mainwindow should receive the key event.