On Jun 28, 2010, at 12:33 , Mike Abdullah wrote: > > On 27 Jun 2010, at 00:01, Guillaume Laurent wrote: > >> Hi all, >> >> I'm having difficulties with the undo/redo mechanism and my Core Data >> objects. The problem is that I create a CoreData object (say a rectangle), >> then set some of its attributes according to some controls values (the >> position and size of a CALayer the user has just created in a view). This >> set of actions is a single one from the user's point of view. I know I can >> make it appear so with NSUndoManager:beginUndoGrouping/endUndoGrouping. But >> when I undo this in the app, each of the steps of the object's creation are >> undone seperately, including the setting of each of the attributes. > > Alarm bells going off here. Even if Core Data wasn't coalescing these changes > into one undo operation, NSUndoManager should do it for you with the > groups-by-event behaviour. Have you turned this off by any chance?
No, I didn't. As I said, the problem is that grouping only means that one 'undo' request will result in several undo actions internally. So undoing the creation of a new CoreData Rectangle object (that is, pressing Cmd-Z) results in several actions : one per each initial parameter setting, and then one for the object creation itself. -- Guillaume http://telegraph-road.org _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
