QGraphicsView::dropEvent always returns the event 'accepted'

When subclassing QGraphicsView::dropEvent, the call to the base class implementation (QGraphicsView::dropEvent) always results in the event being 'accepted', even if neither a QGraphicsItem, nor the QGraphicsScene itself handled the event.

The reason seems to be that QGraphicsView::dropEvent creates a new event to be sent to the scene, and this event is based on a default-constructed QEvent.
A default-constructed QEvent is accepted by default (see qcoreevent.cpp).

Since no code handles ignoring the event if neither items nor scene uses it, the event stays accepted.