Ashley,
Thanks for your advice. I think you are right, I have implemented
Graham's recommendation but even though undo/redo works fine, as you
mention, there seems to be no effect on the window's dirty state.
Regards,
Huibert
On 03/04/2009, at 10:22 a.m., Ashley Clark wrote:
On Apr 2, 2009, at 10:57 PM, Huibert Aalbers wrote:
Hi everyone,
I am writing an application that offers support for Undo/Redo.
Everything works fine, except for a small detail that bothers me.
Since I set the document edited flag manually, using the [theWindow
setDocumentEdited:YES] instruction each time the document is
modified, I have no way to remove the flag when a user undoes all
the changes.
The solution would be to set the document edited flag based on the
status of the Undo menu item state. Is there a simple way to do this?
Register an observer on your undo manager's
NSUndoManagerDidUndoChangeNotification and
NSUndoManagerDidRedoChangeNotification and set your dirty flag there.
As far as I know returning the undo manager via your window
delegate's windowWillReturnUndoManager: only keeps the window from
creating its' own undo manager, it does not set up the mechanisms to
update the window's dirty state.
Ashley
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