2009/11/18 Andrew Farmer <andf...@gmail.com>:
> Don't. Arbitrarily changing the size of your view in setFrame: makes AppKit 
> lose track of what size your view was, making it impossible to restore the 
> original size later. Cut the view down to square at draw time instead.

This sounds like an even worse idea.

If your concern is about autoresizing, override
-resizeWithOldSuperviewSize:.  Otherwise, never call -setFrame: with a
non-square size.  (Perhaps you can override -setFrame: to throw an
exception if it's given a non-square frame.)

--Kyle Sluder
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