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c++qtqgraphicsitemqgraphicsscene

Does QGraphicsScene, or QGraphicsItem, store scene coordinates?

I programmatically move the items in my QGraphicsScene and they end up in the wrong places. They end up at coordinates (2x, 2y), instead of (x, y).

Somewhere I am changing the wrong thing. I work both with the scene and with individual items, accessing both through pointers.

QGraphicsItem::pos() can give you the position in scene coordinates (it has no parent). QGraphicsScene holds a list of all the items within the scene: QList<QGraphicsItem *> QGraphicsScene::items () const.

My question: the information of where an item is on the scene - is it stored within the scene or within the item?

Thanks!

Solution

  • In item i.e. in qgraphicsitem pimpl class. Open qgraphicsitem_p.h and there you will find QPointF pos member.