Publish-and-Subscribe

Publish and Subscribe

This is an implementation of the Publish-and-Subscribe (Observer) pattern. It allows controls to register their interest in messages from any other control or from specific controls. When a control issues the message, the controls that have registered interest in it are notified and they can handle the message as they see fit. This allows developers to concentrate on their application logic without having to worry about the details of changing the scripts of multiple objects with every change.