QGraphicsItem::setHandlesChildEvents() has been obsoleted but not cleaned up appropriately. From the looks of things, setFiltersChildEvents() is now the correct thing to use, if this is the case then setHandlesChildEvents() should be changed to just call setFiltersChildEvents() instead.

In addition QGraphicsItemGroup needs to have its call to setHandlesChildEvents() changed too. If one is not a replacement for the other then it should be unobsoleted for the sake of QGraphicsItemGroup if nothing else.