I'm currently working on a small graphics application used for
editing the images in a game. I've implemented selection, line, rect,
etc. tools, but I've noticed that while the mouse button is pressed,
I can still activate Undo and Redo with Cmd+Z and Cmd+Shift+Z. I took
a look at -[NSUndoManager disableUndoRegistration/
enableUndoRegistration], but they only affect the creation of new
Undo events, rather than stopping me from firing old ones. -
validateMenuItem: is never sent to my view for the Undo or Redo menu
items, so I can't use that to disable them. Anybody have any ideas?
Thanks,
Jonathan Grynspan
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