Re-Implementation of QGraphics::itemChange() NOT working

[wysota]

anda_skoa told you it wouldn't do the trick because you are mixing two coordinate spaces.

I want to limit the movement of the child item to the bounds of the parent item

Bounds of the parent item:

QRectF bounds = parent->boundingRect();

QRectF bounds = parent->boundingRect();

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Limit movement of child to that rect:

if(!bounds.contains(pos())) { ... }

if(!bounds.contains(pos())) { ... }

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Riddle:
What coordinate space are we using here?
a) item
b) item's parent
c) scene