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    Specifying Events

    To define an event, you declare a name for the event in the events block. Then one of the class methods triggers the event using the method, which is method inherited from the handle class. Only classes derived from the handle class can define events.

    For example, the following class:

    • Defines an event named StateChange
    • Triggers the event using the inherited notify method.
    •  class_name < handle %  handle
         events % Define an event called StateChange
               % Broadcast notice that StateChange event has occurred

      Listening for Events

    Any number of objects can be listening for the StateChange event to occur. When notify executes, MATLAB calls all registered listener callbacks and passes the handle of the object generating the event and an event structure to these functions. To register a listener callback, use the addlistener method of the handle class.


    [important]See Defining — Syntax and Techniques[/important]

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