Kevin, thanks for that. This was exactly the problem. My text view subclass asks its delegate for an undo manager, and I forgot to implement the delegate method in this particular document subclass.
Many thanks!
Martin
On May 23, 2012, at 07:00 PM, Kevin Perry wrote:
>
> On May 23, 2012, at 9:43 AM, Martin Hewitson <martin.hewit...@aei.mpg.de>
> wrote:
>>> It is indeed -updateChangeCount: that controls the 'Edited' state. You
>>> might try overriding with a call to super and setting a breakpoint or
>>> adding a log to make sure it's being called as expected (with
>>> NSChangeDone). That should be getting called by the undo mechanism, but it
>>> would be good to verify.
>>
>> It's being called only once when the document is loaded. It gets called with
>> NSChangeCleared, which I guess is what you would expect. I've no idea why it
>> isn't called after edits.
>>
>> If I return NO from autosavesInPlace, I see the same behaviour. The dirty
>> dot in the red button does not appear after an edit. If I listen for text
>> did change notifications from the text view and call -updateChangeCount in
>> there, then everything works normally.
>
> Perhaps the NSTextView's NSUndoManager isn't the same as the NSDocument's?
>
> This is supposed to work automatically, but maybe you've done something to
> prevent this. If its delegate doesn't specify one, the NSTextView searches
> the responder chain for something that responds to -undoManager. Usually
> that's the NSWindow. If its delegate doesn't specify one, the window will get
> its undo manager from [[[self windowController] document] undoManager].
>
> Compare the pointers of [textView undoManager] and [document undoManager]. I
> suspect they're different.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer
Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: martin.hewit...@aei.mpg.de
WWW: http://www.aei.mpg.de/~hewitson
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