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mediator doesn't catch component event

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Anggie Bratadinata

24 Jan, 2011 03:38 AM

I'm having a problem with a listener to view component event in my mediator attached via eventMap.mapListener().
My CustomEvent is never caught.

Here are my codes:

Main class:
http://paste2.org/p/1208571

AppContext:
http://paste2.org/p/1208572

View component:
http://paste2.org/p/1208573

Mediator:
http://paste2.org/p/1208574

Customevent:
http://paste2.org/p/1208577

What I'm doing wrong?

Thanks a lot in advance.

1. 1 Posted by Stray on 24 Jan, 2011 09:59 AM

   

   Hi there,

   there's nothing jumping out at me as being incorrect.

   I had wondered whether your meta data was getting dropped, or the framework wasn't all being included, but the fact that this works rules all of that out:

   view.addEventListener(ComponentEvent.CLICK, onComponentClick);

   Your event has clone overridden... so it's not that.

   Could you zip the whole lot for me? Including your project file, and then I can try to get it compiling here and see whether it works for me.

   Thanks,

   Stray

   • Edit

2. 2 Posted by Anggie Bratadin... on 24 Jan, 2011 10:15 AM

   

   Hi, Stray,

   Thanks for replying. I attached the project.

   Thanks again!

   • RL-todolist.zip 87 KB
   • Edit

3. Support Staff 3 Posted by Ondina D.F. on 24 Jan, 2011 11:34 AM

   

   Hi Anggie,

   Your example works on my end, meaning it traces:
   [object TodoListComponent]onClick

   [object ViewMediator]onComponentClick componentClick

   Nevertheless there are some things that I would do differently:

   Main.as

   private var context:AppContext; // keep a reference to your context instance

   public function Main():void
   {

   context = new AppContext(this);

   }

   instead of

   private function init(e:Event = null):void
   { removeEventListener(Event.ADDED_TO_STAGE, init);
   // entry point var context:AppContext = new AppContext(this);
   }

   from Common Problems (https://github.com/robotlegs/robotlegs-framework/wiki/Common-Problems) :

   The problem here is that the context is scoped as a local variable, and as such it will be free for Garbage Collection pretty much straight away. The context might function for a little while, but at some point in time it will be GC’d and cease to exist.

   ComponentEvent.as

   public static const COMPONENT_CLICK:String = "componentClick";// to prevent name collisions

   instead of

   public static const CLICK:String = "componentClick";
   

   ViewMediator.as

   private function onComponentClick(e:ComponentEvent):void

   so you can access the payload of your custom event , in case you need it in the Mediator

   instead of

   private function onComponentClick(e:Event):void

   TodoListComponent.as

   dispatchEvent(new ComponentEvent(ComponentEvent._COMPONENT_CLICK));

   instead of

   dispatchEvent(new ComponentEvent(ComponentEvent.CLICK));

   I’m sure Stray will give you more insight :)

   Ondina

   • Edit

4. 4 Posted by Stray on 24 Jan, 2011 11:40 AM

   

   Well spotted Ondina - that's exactly what it is.

   The context isn't being held on to, and thus the mediator is disappearing after a couple of seconds, as it is only referenced in objects inside the context.

   Stray

   • Edit

5. 5 Posted by Anggie Bratadin... on 24 Jan, 2011 01:31 PM

   

   Ah, yes, moving context var out of the function fixed it.

   Thanks a lot guys!

   • Edit

6. Stray closed this discussion on 11 Feb, 2011 11:16 PM.