RE: [Flashcoders] Need help understanding EventDispatcher

[Bjorn Schultheiss]

This is better, more extensible

// on timeline


var myBall:Ball2 = Ball2.createInstance( this, 2 ).init();
myBall.addEventListener( 'ALL', this );

function onBallPress():Void {
 trace("onBallPress");
}

// Ball Class
import com.qdc.events.QDispatcher;
import com.dynamicflash.utils.Delegate;

class Ball2 extends MovieClip
{
        // constants
        public static var CLASS_NAME : String = "Ball2";
        public static var SYMBOL_NAME : String = "testBall";

        // methods
        public function dispatchEvent() {};
        public function addEventListener() {};

        public static function createInstance( parent:MovieClip,
depth:Number, name:String  ) : Ball2
        {
                 if( depth == undefined) depth =
parent.getNextHighestDepth();
                 if( name == undefined) name = SYMBOL_NAME + depth;
                 return Ball2( parent.attachMovie( SYMBOL_NAME, name,
depth));
        }

        public function init() : Ball2
        {
                QDispatcher.initialize( this );

                this._x = 100;
                this._y = 100;
                this.lineStyle(20, 0xff0000, 100);
                this.lineTo(0,.2);
        
                return this;
        }

        public function onLoad() : Void
        {
                aBall.onPress = dispatchEvent( { type : 'onBallPress' } );
        }
}



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Patrick
Matte
Sent: Thursday, 13 April 2006 1:12 PM
To: Flashcoders mailing list
Subject: Re: [Flashcoders] Need help understanding EventDispatcher

I dont see exactly why use for the event dispatcher.
Wouldn't this be good as well ?


// on timeline

import Ball2.as;
import mx.utils.Delegate;

var myBall:Ball2 = new Ball2();

myBall.onBallPress = Delegate.create(this,onBallPress);
myBall.addEvents();

function onBallPress():Void {
 trace("onBallPress");
}


// ball class

import mx.utils.Delegate;
class Ball2 {

 public var onBallPress:Function;
 private var aBall:MovieClip;

 public function Ball2 () {
  // create a ball MC
  aBall = 
_level0.createEmptyMovieClip('testBall',_level0.getNextHighestDepth()  );

  // draw ball
  aBall._x = 100;
  aBall._y = 100;
  aBall.lineStyle(20, 0xff0000, 100);
  aBall.lineTo(0,.2);
 }

 public function addEvents():Void{
  aBall.onPress = Delegate.create(this,onBallPress);
 }

}

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