On Feb 19, 2009, at 9:28 PM, Graham Cox wrote:
Undo isn't *required* to be symmetrical. It just happens to be when
setting a single property like your -setColor: example.
...
Seems to me this is the sort of design you want.
Yes, yes it is...
On Feb 19, 2009, at 8:29 PM, Michael Ash wrote:
I'm afraid I don't understand the difficulty.
Well, it turns out (as was pointed out to me in an off-list message--
thanks again, Greg!) the "difficulty" was me severely over-thinking
the issue, and getting off-track by setting up some Undo stuff outside
of the method where it really belonged. Fixing that, and cracking
open another bottle of Mt. Dew set me straight, and now I've nearly
completed the entire task.
Thanks for all your feedback!
randy
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