Event Model

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Event Model

DELEGATE EVENT MODEL

This model is based on three entities:

a control, which is the Event Source

some Consumers , also called Listeners , that receives the events from the source.

some Interfaces (in the broader meaning of the term), that describe the Protocol by which every event as to be communicated.

Furtermore the model requires that:

every listener must implement the interface for the Event it wants to listen to (done at programming time)

every listener must register to the source, to declare is will to listent some particular events (done at runtime)

every time that the source generates an event, it communicates it to the registered lsteners, following the protocol of the interface