Quote Originally Posted by wysota View Post
Use QGraphicsItem::mapTo*() family of methods to map to parent or the scene.
I'm sorry, but I don't understand how that would help me. Could you explain a bit more how I would have to use it?

I need to know the real width() of the QGraphicsItem with the transformation taken into account. How should I use one of the mapTo*() functions to achieve that, or to achieve something similar? As far as I am aware, the mapTo*() functions also don't know about the transformation.