Question

How do I define my own event listeners in AS3? I know it has to do with dispatch event, but I’m pretty much lost on how to use it.

I’m writing custom classes.

Answer 1

If you don’t need to pass arguments with the events, just using a string like erkmene said will work.

The listener:

dispatchingObject.addEventListener( "SomeEvent", onEvent );

The dispatcher:

dispatchEvent( new Event( "SomeEvent" ) );

Make sure the class dispatching the event extends EventDispatcher either directly or somewhere in the class hierarchy.

The above code works but its best if the dispatching object holds the names of the events that it dispatches in static constant variables.

The listener:

dispatchingObject.addEventListener( DispatchingClass.SOME_EVENT, onEvent );

The dispatcher:

public static const SOME_EVENT : String = "SomeEvent";

dispatchEvent( new Event( SOME_EVENT ) );