This interface is used to listen to notifications from an IOperationHistory. The supplied OperationHistoryEvent describes the particular notification.
Operation history listeners must be prepared to receive notifications from a background thread. Any UI access occurring inside the implementation must be properly synchronized using the techniques specified by the client's widget library.
(OperationHistoryEvent event)Something of note has happened in the IOperationHistory. Listeners should check the supplied event for details.
event- the OperationHistoryEvent that describes the particular notification.