On 10-Dec-08, at 8:54 PM, Graham Cox wrote:
On 11 Dec 2008, at 2:53 pm, K. Darcy Otto wrote:
I'm trying to get undo working with an application that is not
document-based. So far, I think I have got the operation on the
stack, but have yet to get the menu reflecting this. What I have
so far is the initialisation of undoMan (in init:), but when I get
the operation onto the stack (by the last method,
observeValueForKeyPath:), the undo menu item does not get activated.
If I add the line:
undoMan = [[NSUndoManager alloc] init];
To ensure that the menu is correctly linked to this undo manager,
you need to use:
-windowWillReturnUndoManager:
which is a delegate method of NSWindow. If you set your
AppController to be the window's delegate and implement this method
to return undoMan, you should find the menu works as you want.
That solves the problem. I just made AppController the delegate, as
you suggested, and then added this code:
- (NSUndoManager *)windowWillReturnUndoManager:(NSWindow *)sender
{
return undoMan;
}
And it worked like a charm. Thank you!
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