Quote Originally Posted by jano_alex_es View Post
wysota: I forgot... I also have QGraphicsPixmap items, linked with the LineItems and inside the pathItems as well. So my big issue was with them.

I was dealing with "setScenePos" and "mapToScene", but they didn't work... now I'm working with "setPos" and "mapToParent/mapFromParent" more or less succesfully.
If they have a common parent then you shouldn't be mapping to scene. There should be no mapping at all.

In general it would be easiest to place all the movable items into one item group and make that group movable instead of the child items themselves. If you tell the parent to handle events from its children, it should work without any additional code. And no need to react on position changes.