general undo methods?
ambassador at fourthworld.com
Fri Feb 18 16:40:57 EST 2005
Lynch, Jonathan wrote:
>> I need to add more extensive undo to an app I'm working on.
>> Seems like a lot of work once you step outside of the subset
>> of things the engine takes care of for you.
>> Any of you have pointers to general methods for implemening
>> undo across an app?
> You could set it up so that every time you make a change,
> you create a copy of the stack in memory. Actually, have
> like 5 copies of the stack in memory, and for each change,
> you replace one of those stacks, and keep a list in a
> global variable of where you are in the rotation through
> those five copies in memory....
I can see how that approach would be useful for some apps, but this one
has a large stack and the changes made a very small (moving objects,
deleting objects, etc.).
Anyone have a link to a good paper on how folks handle undo in "real" apps?
Fourth World Media Corporation
Ambassador at FourthWorld.com http://www.FourthWorld.com
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