An event listener registers with an event source to receive notifications about the events of a particular type,
with the exception of lifecycle event listeners are registered by using addListener
method on lifecycle event manager.
There is a separate package called titan.events.lifecycle that contains lifecycle event and lifecycle event listener classes. The lifecycle events are raised when lifecycle stages are executed for each UIControl.
@see titan.UIControl @see titan.events.UIEvent @see titan.events.UIEventListener @see titan.events.UIEventManager @see titan.controls.html