Question

I have created some code in Actionscript 3 following various tutorials which is a simple media player linked to an XML file for the source information. I have found out though I need to use actionscript classes for the code and wondered is their a way to convert it to classes or does anyone know of a tutorial in actionscript 3 for creating a media player based on classes? My code is below:

import flash.net.URLLoader;
import flash.events.Event;
import flash.net.URLRequest;

var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE,xmlloaded);

var xml:XML = new XML();
var amountofvid:Number=0;
var currentvideo:Number=0;

btn_prev.addEventListener (MouseEvent.CLICK, prevvid);
btn_next.addEventListener (MouseEvent.CLICK, nextvid);

loader.load(new URLRequest('videos.xml'));

function xmlloaded (e:Event) {
    xml=XML(e.target.data);
    amountofvid=xml.video.length ()-1;
    changevid();
}

function nextvid (e:Event) {
    currentvideo++;
    changevid();
}

function prevvid (e:Event) {
    currentvideo--;
    changevid();
}

function changevid():void {
    var cv:Number=Math.abs(currentvideo);

    if (cv>amountofvid) {
        currentvideo=cv=0;
    }
    if (currentvideo<0) {
        currentvideo=cv=amountofvid;
    }

    vid.source = xml.video.@src[cv];
    title.text = xml.video.@title[cv];

}

Any ideas?

Update, thanks for the help guys both helped loads wish I could pick you both a solved answers.

Answer 1

here’s a quick conversion of your code to a classe.

package  {

import flash.net.URLLoader;
import flash.events.Event;
import flash.net.URLRequest;    

public class mediaPlayer extends Sprite {

    private var loader:URLLoader;
    private var xml:XML;
    private var amountofvid:Number=0;
    private var currentvideo:Number=0;

    public function mediaPlayer() {

        loader = new URLLoader();
        loader.addEventListener(Event.COMPLETE,xmlloaded);
        btn_prev.addEventListener (MouseEvent.CLICK, prevvid);
        btn_next.addEventListener (MouseEvent.CLICK, nextvid);
        loader.load(new URLRequest('videos.xml'));

    }

    private function xmlloaded (e:Event) {
        xml = new XML();
        xml=XML(e.target.data);
        amountofvid=xml.video.length()-1;
        changevid();
    }

    public function nextvid (e:Event) {
        currentvideo++;
        changevid();
    }

    public function prevvid (e:Event) {
        currentvideo--;
        changevid();
    }

    private function changevid():void {
        var cv:Number=Math.abs(currentvideo);

        if (cv>amountofvid) {
            currentvideo=cv=0;
        }

        if (currentvideo<0) {
            currentvideo=cv=amountofvid;
        }

        vid.source = xml.video.@src[cv];
        title.text = xml.video.@title[cv];

    }

}

}

I assumed that it will be associated to a sprite so i extended it as such. If you want to associated the classe to something else, you will want to change this line :

public class mediaPlayer extends Sprite {

I kept both nextvid and prevvid methods public (meaning you can access it from another level, a parent for example) and your other methods and variables private (accessible from this level only). You might want to change that to suit your need.

For a startup tutorial on how classes works, i would suggest this one on GoToAndLearn.com
http://gotoandlearn.com/play.php?id=43

m.