Access of undefined propety and other errors (AS3) - actionscript-3

Question

ok so I am trying to work on making my scripts external .as files.
I had them on the timeline and they worked fine but when I put them in the as file they don't work at all.
This is my code as of right now
so I got the script working externally thank you very much :)
I just need to addchild to the stage. I use
import Scripts.resources.main;
var Main:main = new main;
addChild(Main);
In my external script I addchild in the main function now.
package Scripts.resources
{
import flash.events.Event;
import flash.events.MouseEvent;
import flash.net.URLRequest;
import flash.net.URLVariables;
import flash.net.URLLoader;
import flash.net.URLRequestMethod;
import flash.events.OutputProgressEvent;
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.display.Stage;
import flash.events.EventDispatcher;
public class main extends EventDispatcher{
private var _stage:Stage;
var url:String = "php/data_user.php";
//declare our graphic vars
var stmBar:resourceBar;
var tenBar:resourceBar;
var potBar:resourceBar;
var spdBar:resourceBar;
var crtBar:resourceBar;
var awrBar:resourceBar;
var resBar:resourceBar;
var statUp:Sprite;
//This Returns the number of milliseconds since midnight January 1, 1970
//Tacking the time variable at the end of your php file locations will ensure their is no caching
var now:Date = new Date();
var time:Number = now.getTime();
/*
* These should point to your PHP files. I recommend NOT using an http path because accessing
* the site via 'www.yoursite.com' versus 'yoursite.com' makes a difference and will cause undefined
* issues. Instead use a relative path like: var registerLocation:String = "membership/php/register.php";
*/
var registerLocation:String = "php/register.php" + "?" + time;
var loginLocation:String = "php/login.php" + "?" + time;
var editProfileLocation:String = "php/editprofile.php" + "?" + time;
var forgotPWLocation:String = "php/forgotpw.php" + "?" + time;
var statsLocation:String = "php/user_stats.php" + "?" + time;
var statsGylph:String = "php/data_user.php" + "?" + time;
//userInfo is the Object that gets populated that stores all of the users information.
var userInfo:Object = new Object();
//The minimum length of a password.
var passwordLength:Number = 4;
/*
* var cookie refers to swfObjects addVariable. If you look at membership.php, where swf
* object is defined, addVariable shows a var called usercookie.
* This help decide if the program should remember the users username or not.
*/
//cookieUserName would be the username that gets put into the user field if the cookie has been set
public function main(stage:Stage)
{
_stage = stage;
var _loader:URLLoader = new URLLoader();
var _request:URLRequest = new URLRequest(url + "?id=" + userInfo.id);
_request.method = URLRequestMethod.GET;
_loader.addEventListener(Event.COMPLETE, onLoadData);
_loader.load(_request);
_stage.addChild(stmBar);
stmBar.x = -50;
stmBar.y = 200;
}
public function MyClass(){
this.addEventListener(Event.ADDED_TO_STAGE, addedToStage);
}
private function addedToStage(e:Event):void {
this.removeEventListener(Event.ADDED_TO_STAGE, addedToStage);
//this code will run after you've added this object to the stage
//it is the equivalent of when timeline code runs
}
function onLoadData(e:Event):void {
var str:String = e.target.data;
var array:Array =str.split("-");
for(var i:int;i < array.length; i++)
output(i+1,array[i]);
}
public function output(field:Number,i:int):void
{
if (field == 5)
{
stmBar = new resourceBar(0, 0, i, "Stamina", 0x990000);
stmBar.x = -200;
stmBar.y = 50;
}
else if (field == 6)
{
tenBar = new resourceBar(0, 0, i, "Tenacity", 0xFF9900);
tenBar.x = 200;
tenBar.y = 50;
}
else if (field == 7)
{
potBar = new resourceBar(0, 0, i, "Potency", 0xCC3399);
potBar.x = -200;
potBar.y = 100;
}
else if (field == 8)
{
spdBar = new resourceBar(0, 0, i, "Speed", 0x00CC00);
spdBar.x = 200;
spdBar.y = 100;
}
else if (field == 9)
{
crtBar = new resourceBar(0, 0, i, "Crit", 0x009999);
crtBar.x = -200;
crtBar.y = 150;
}
else if (field == 10)
{
awrBar = new resourceBar(0, 0, i, "Awareness", 0x3399CC);
awrBar.x = 200;
awrBar.y = 150;
}
else if (field == 11)
{
resBar = new resourceBar(0, 0, i, "Resistance", 0x999999);
resBar.x = -200;
resBar.y = 200;
addEventListener(Event.ENTER_FRAME, onLoop);
}
function onLoop(e:Event):void
{
stmBar.change(1);
tenBar.change(1);
potBar.change(1);
spdBar.change(1);
crtBar.change(1);
awrBar.change(1);
resBar.change(1);
}
}
}
}
my problem is it won't add the children in the main function when I addchild of main. am I able to add a child with children inside it?

Answer 1

In class files, all code needs to be wrapped in a function. So where you have:
_loader = new URLLoader();
_request = new URLRequest(url + "?id=" + (STAGE.parent as MovieClip).userInfo.id);
_request.method = URLRequestMethod.GET;
_loader.addEventListener(Event.COMPLETE, onLoadData);
_loader.load(_request);
You need to place it in a function for the code to be valid. If you want that bit of code to run right away, then you can place it in a constructor (that is the function in class that runs when you instantiate with the new keyword, eg new main(). If main is your document class, then the constructor is the very first code to run in the application.
Constructors are public functions that have the exact name of your Class.
public function main(){
_loader = new URLLoader();
_request = new URLRequest(url + "?id=" + (STAGE.parent as MovieClip).userInfo.id);
_request.method = URLRequestMethod.GET;
_loader.addEventListener(Event.COMPLETE, onLoadData);
_loader.load(_request);
}
Something to keep in mind, is that in the constructor of display objects, the stage/parent/root keywords will NOT have any value, as those are populated once the display object has been added to the display. So, it's common to use this approach:
package MyClass extends Sprite {
public function MyClass(){
this.addEventListener(Event.ADDED_TO_STAGE, addedToStage);
}
private function addedToStage(e:Event):void {
this.removeEventListener(Event.ADDED_TO_STAGE, addedToStage);
//this code will run after you've added this object to the stage
//it is the equivalent of when timeline code runs
}
}
Also, a tip now that you are writing class files - follow the convention of making class names start with an Uppercase letter, and instances of classes start with lowercase letters.