public class UndoManagerMonitor : BaseNotificationMonitor
UndoManagerMonitor instance monitors an undo manager for changes to
its recording of operations.
Initializes a new
The undo manager to monitor.
The options that specify which events to monitor. By default, all events are monitored.
The operation queue on which the handler executes. By default, the main operation queue is used.
The handler to call when there is a change to the undo manager’s recording of operations.
The undo manager being monitored.
public let undoManager: UndoManager
override public func addNotificationObservers()