@StudentScripter said in QGraphicsRectItem item translation instead of movement?:

Well the real problem seems to be that rect().setTopLeft() and all other direct changes to the parentitems rect result in a changed Origin Point of the object in the scene, while with setScale() the OriginPoint stays intact.

AFAIK the "topLeft" of an item rotated by 90° clockwise is still the same point as when not being transformed... the original item stays the same, because you can revert the transformation at any time to get your initial item back. The QTranform only "maps" the initial item matrix to your transformed one.
So I think calling setTopLeft manually will mess up your item and the current transformation completely.

At the end I've researched again the view's transformations and concluded to support both features and warn for the complexity.

I did not re-implement the add/remove items of the scene together with a group. Thanks for the hint @Asperamanca .

@michelmadeira said in How to rotate a Pixmap around bottom, right corner?:

How to change anchor point of a pixmap rotation?

By modifying your QTransform to set 0/0 to the bottom right corner because the Qt coordinate system starts with 0/0 in the upper left.