Event Handling & AWT - Event Delegation Model

Event Handling & AWT - Event Delegation Model

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  Event Delegation Model
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  Event Delegation Model –Modern approach for event handling. – Defines a standard and compatible mechanism to generate and process events. – In this model, a source generates an event and forwards it to one or more listeners. – The listener waits until it receives an event. Once it receives the event, it is processed by the listener and returns it. – The listener must be registered with a source to receive an event.
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  Delegation Event Model –The main advantage of the Delegation Event Model is that : – the application logic (to process events) is completely separated from the interface logic (that generates events). – Basically, an Event Delegation Model is based on the following three components: • Events • Events Sources • Events Listeners
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  Delegation Event Model
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  Delegation Event Model SourceListener Event MyListener ActionEvent