On Jul 21, 2008, at 8:52 PM, Todd Heberlein wrote:
Is there a way to link a controller (e.g., the NSArrayController) to
my NSDocument's NSUndoManager without having to add a bunch of code
to my NSDocument subclass?
For example, in Hillegass's book, the first example of RaiseMan
(Chap 8) has a nice clean design that lets the NSArrayController
manage all interactions between the table view and the NSArray model.
I haven't done this example, so pardon me if I'm guessing incorrectly
when it comes to what the example does…
But when adding the undo/redo capability (Chap 9) you have to add a
lot of code to MyDocument to intercept and register with the
NSUndoManager all insertion/deletion and edits to the model. This
seems inelegant.
It would be nice to register MyDocument's NSUndoManager with the
NSArrayController so that the NSArrayController can handle all the
undo and redos.
That'd be neat, if you only ever edit model objects via the
arrayController. Actually, even then, I don't think that'd be that
neat. The document owns the model objects and, probably, the editing
scope. It's plenty elegant to leave the undo manager handling logic to
reside in the document instead of adding it to the arrayControllers.
Oh and the treeControllers. Maybe the objectControllers? And don't
forget the myAwesomeHomeGrownController.
So while what you're asking for may be possible, it wouldn't be more
elegant (from my point of view) and would probably eat up just as many
lines of code.
Is it possible to do this?
Thanks,
Todd
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