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Mediator doesn't work when dispatching existing event

• Edit

Hez

25 Jun, 2010 03:28 AM

Hi

MyEvent is mapped to a command.

MyEvent is dispatched when the user clicked on a button.

So the following is my mediator:

public class MyViewMediator extends Mediator
{
    [Inject]
    public var view:MyView;

    override public function onRegister():void
    {
        eventMap.mapListener(view, MyEvent.CALCULATE, handleCalculate);
    }

    private function handleCalculate(event:MyEvent):void
    {
        // this will not work by dispatching the existing event
        // dispatch(event); 

        // this is working!
        dispatch(new MyEvent(MyEvent.CALCULATE));
    }
}

I'm wondering why it doesn't work if we dispatching the existing event as commented in the code?

1. 1 Posted by Hez on 25 Jun, 2010 06:52 AM

   

   OK, the problem is resolved by adding the following clone() in MyEvent.

   public class MyEvent extends Event
   {
       ...
       override public function clone():Event
       {
           return new MyEvent(this.type);
       }
   }
   

   So I think it is a must for Robotlegs application to provide a clone() in every custom event?

   • Edit

2. Support Staff 2 Posted by Joel Hooks on 25 Jun, 2010 07:17 AM

   

   It is best practice with ANY custom events, irrespective of framework, to override the clone() method. Events cannot be redispatched or bubbled without doing so.

   • Edit

3. Joel Hooks closed this discussion on 25 Jun, 2010 07:17 AM.