Design question: Optimize item layout management in a QGraphicsScene

[Lykurg]

Did you have a look at QGraphicsItem::itemChange ??

Nice, I havn't seen this yet, but unfortunately GraphicsItemChange has no value ItemBoundingRectChange.
Meanwhile I have think of a other solution, which seem to fit best my purpose:
I subclass QGraphicsScene and put there my updateItemLayout() function. If an item changes it size (I will put a routine into my custom items) i call the function myself in the item via scene()->updateItemLayout().

Thanks for mentioning QGraphicsItem::itemChange
Lykurg