Global Variable

NSUndoManagerWillUndoChangeNotification

Posted just before an NSUndoManager object performs an undo operation.

Declaration

const NSNotificationName NSUndoManagerWillUndoChangeNotification;

Discussion

If you invoke undo or undoNestedGroup, this notification is posted. The notification object is the NSUndoManager object. This notification does not contain a userInfo dictionary.

See Also

Notifications

NSUndoManagerCheckpointNotification

Posted whenever an NSUndoManager object opens or closes an undo group (except when it opens a top-level group) and when checking the redo stack in canRedo.

NSUndoManagerDidOpenUndoGroupNotification

Posted whenever an NSUndoManager object opens an undo group, which occurs in the implementation of the beginUndoGrouping method.

NSUndoManagerDidRedoChangeNotification

Posted just after an NSUndoManager object performs a redo operation (redo).

NSUndoManagerDidUndoChangeNotification

Posted just after an NSUndoManager object performs an undo operation.

NSUndoManagerWillCloseUndoGroupNotification

Posted before an NSUndoManager object closes an undo group, which occurs in the implementation of the endUndoGrouping method.

NSUndoManagerDidCloseUndoGroupNotification

Posted after an NSUndoManager object closes an undo group, which occurs in the implementation of the endUndoGrouping method.

NSUndoManagerWillRedoChangeNotification

Posted just before an NSUndoManager object performs a redo operation (redo).