- aboutToPerformChange
The infrastructure is going to perform the given change. If a client calls this
method it must make
- addUndo
Adds a new undo change to this undo manager.
- flush
Flushes the undo manager's undo and redo stacks.
- shutdown
Shut down the undo manager.
- addListener
Adds a listener to the undo manager. Does nothing if the listener is already
present.
- anythingToRedo
Returns true if there is anything to redo, otherwisefalse.
- anythingToUndo
Returns true if there is anything to undo, otherwisefalse.
- peekRedoName
Returns the name of the top most redo.
- peekUndoName
Returns the name of the top most undo.
- performRedo
Redo the top most redo change.
- performUndo
Undo the top most undo change.
- removeListener
Removes the given listener from this undo manager. Does nothing if the listener
isn't registered wit