Re: Ephemeral Changes
Re: Ephemeral Changes
- Subject: Re: Ephemeral Changes
- From: Jens Miltner <email@hidden>
- Date: Thu, 27 Mar 2008 14:46:14 +0100
Am 27.03.2008 um 11:57 schrieb Gerriet M. Denkmann:
On 26 Mar 2008, at 22:56, Graham Cox wrote:
The undo manager will directly change the data in the text view
using an invocation or target/action - it doesn't go back through
changeFont: normally, which is really a "high level" method.
Maybe the solution to this is to subclass NSUndoManager so that you
can hook into the undo and redo methods and use those opportunities
to modify the change count of the document.
So I implement in MyUndoManager:
- (void)undo
{
NSString *action = [self undoActionName];
[ super undo ];
if ( action contains "Font" ) [myDocument
updateChangeCount:NSChangeUndone];
}
Maybe there's a way to trigger on the action selector instead of the
action name? However, even the action selector _might_ change in
future AppKit versions, so even this would be a somewhat fragile
solution.
I'd still think that it might be easier to register you own undo
action for the font changes instead of trying to hijack the automatic
undo...
just my €.02,
</jum>
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