QGraphicsView's rubberband does not handle scrolling

When scrolling using the wheel (or having added an autoscroll) in QGraphicsView, the rubberband should expand along. Instead rubberband is scrolled along with the contents of the QGraphicsView and non-visible items are lost from the selection.

Update: reopened due to problems still apparant with it

Update: This isn't just for the rubberband, investigate also generally how scrolling based on mouse position during mouse grab can be improved (possibly for QAbstractScrollArea).