On Mon, 10 Jan 2011 22:35:28 -0800, Jerry Krinock said:

>Aside: Reading this thread really makes one appreciate Core Data.
>
>I've written a Core Data app which can Undo Sort.  The sortable objects
>are the 'many' members of to-many relationships.  Each one has an
>'index' parameter, which is re-set during sorting.  When you 'Undo
>Sort', all of the 'index' parameters get set back to their original
>values.  There is no code to 'Undo Sort' or 'Redo Sort'.  It really is
>"for free" (well, after you've tamed Core Data's Undo Groupings).
>
>I should not discourage John from doing it the hard way first, though.
>The usual warning against Cocoa beginners diving into Core Data applies :)

I agree that Core Data is helpful here.  But it's not a panacea.  For
one, there doesn't seem to be a nice way to get the Undo menu item to
say descriptive things like "Undo Typing", "Redo Size Change", etc.
When doing things 'the hard way' that part's actually easier.

--
____________________________________________________________
Sean McBride, B. Eng                 s...@rogue-research.com
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada


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