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How to add and remove Mediators in a actionscript-3 puremvc app

March 30th, 2008

So since PureMVC has updated twice and also I never talked about garbage collection of the app, I have refactored PurelyKuler to work with PureMVC 2.3. Thate are quite a few changes, some being:

1. the framework is being ported to many languages like PHP, Ruby, Python, Coldfusion, C# and many others.
   [as]import org.puremvc.as3.interfaces.IFacade;
   import org.puremvc.as3.patterns.facade.Facade;[/as]
   as oppose to
   [as]import org.puremvc.interfaces.IFacade;
   import org.puremvc.patterns.facade.Facade;[/as]
2. there is a new way to notify observers:
   [as]facade.sendNotification(PurelyKulerConstants.STARTUP, app);[/as]
   as oppose to
   [as]facade.notifyObserver(new Notification(PurelyKulerConstants.STARTUP, app))[/as]
3. also the Mediators are can be named from outside the class, so you can have many instances of the class and remove specific instances and not all.public function PurelyKulerMediator(mediatorName:String = null, viewComponent:Object=null){
   _tf = new TextField();

   super(NAME, viewComponent);// the colorContainer
   }
   Those are just a few.

Alright back to PurelyKuler.

So if you look at the last example I did, it was just about getting data from a Proxy to a Mediator.

This time I’m adding garbage collection and using the new, to ver2.3, onRemove method in IMediator to delete all the ui and variables. Like this.
[as]override public function onRemove():void
{
vo.removeEventListener(MouseEvent.CLICK, changeColor);
vo.graphics.clear();
vo.parent.removeChild(_tf);

_tf = null;
_ka = null;
cc = undefined;
trace(”_tf: ” + _tf);
}[/as]
Alright enough typing, here it is. Click on a mediator name.

Source | PurelyKuler2

Entry Filed under: PureMVC, actionscript, as3, flash