My only other question is, I noticed that when you resize the circle to a size larger than any previous size, it moves the entire circle. I.e. if you drag the bottom right corner and make it larger, it will move the top as well. How could you get it so that the only corner that moves is the corner you are dragging (i.e. the top left of the rectangle will stay exactly where it is, and the bottom right and other edges that the drag affects, move,)?
This happens because no "scene rect" has been set explicitly (so it will grow automatically to fit items) and the default alignment of graphics view is centered. So, you could either set a suitable scene rect and/or you could change the alignment of the view.
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