QGraphicsView with QGraphicsPixmapItem that resizes on resize of QGraphicsView

[norobro]

I don't think qgraphicsitem_cast will work the way you are using it.

Check your pointer in debug mode:

BackgroundItem *myBackItem = qgraphicsitem_cast<BackgroundItem*>(graphicItems.at(i));
Q_ASSERT(myBackItem);

BackgroundItem *myBackItem = qgraphicsitem_cast<BackgroundItem*>(graphicItems.at(i));
Q_ASSERT(myBackItem);

To copy to clipboard, switch view to plain text mode 

Try static_cast instead.