Accessing timers within a actionscript class - actionscript-3

Question

I recently started programming in as3, and lately, I've started to learn object oriented programming. My problem is to access functions within a class. I guess that the "main" code is not very suitable for doing so, but I'm pretty much just asking for advice for every part of the code.
Main Code:
import flash.utils.Timer;
import flash.events.TimerEvent;
stage.addEventListener(MouseEvent.CLICK, makeCircle);
function makeCircle(event:MouseEvent):void
{
var s = new Circle();
addChild(s);
s.x = mouseX;
s.y = mouseY;
}
Class code (connected to a MovieClip circle with a MovieClip fill inside):
package
{
import flash.display.MovieClip;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
public class Circle extends MovieClip
{
private var t:Timer = new Timer(30,1000);
var time:Number = 0;
var size:Number;
var bf = new BlurFilter();
var ct:ColorTransform = new ColorTransform();
public function Circle()
{
// constructor code
t.addEventListener(TimerEvent.TIMER, updateCircle);
t.start();
ct.color = 0xffffff * Math.random();
fill.transform.colorTransform = ct;
fill.blendMode = "hardlight";
}
public function updateCircle(event:TimerEvent):void
{
time = t.currentCount / 10;
size = Math.pow(Math.E, - time) * Math.sin(5 * time) * (Math.log(time));
width = (size * 20 + 100 - time * 5) * 2;
height = (size * 20 + 100 - time * 5) * 2;
bf.blurX = time;
bf.blurY = time;
filters = [bf];
alpha = 1 - time / 20;
}
}
}
What I want to do is to remove the child of s (main code) when the t.currentCount (class code) is a set value (when the alpha value is 0).
Thanks in advance.

Answer 1

whay you want to do is do create either an even inside the Circle class that triggers when your timer completes (alpha == 0). The custom event would have to be caught in your main class.
To put a custom event listener in your main class write:
s.addEventListener("RemoveChild", removeChild)
add the handler function
function removeChild(e:Event)
{
removeChild(s);
}
in your circle class you can add the event when you want to trigger it:
this.dispatchEvent(new Event("RemoveChild");
Alternatively you control the Alpha value from your main class by placing the loop there and call removeChild(s); directly.
An easy way to get your custom events working is by using the AS3Signals framework.
Hope that helps