I have a custom class, and within' that class I'm doing an XML load- I'd like
to broadcast to a custom Event for my class from within the _xml.onLoad
statement, however... its not letting me do so. I remember, sometimes, when
using an event inside a class, you have to create a reference to your class
instance and use that to access properties/methods of your class within the
event handler, however, that's not working in this situation. See my code below
to understand what i'm talking about:



----------------------------------
Class Code:
----------------------------------

class SomeClass {
var broadcastMessage:Function;
var addListener:Function;

var _xml:XML;
function someClass () {
// Set up the AsBroadcaster
AsBroadcaster.initialize(this);
addListener(this);

// Create a reference to your class instance
_class = this;

// Do the XML Code and Load the file.
_xml = new XML();
_xml.onLoad = myFunction;
_xml.load("file.xml");
} // End function

function myFunction(success) {
if (success) {
_class.broadcastMessage("onStatus","xml loaded");

// The following trace comes back undefined:
trace("class: " + _class)
} // End if
} // End function
} // End class


----------------------------------
Frame Code:
----------------------------------
var myClass:SomeClass = new SomeClass();
var listener_obj:Object = new Object();

listener_obj.onStatus = function (msg:String) {
trace("msg: " + msg);
} // End function

myClass.addListener(listener_obj);

UPDATE: I found a solution that works, however, if somebody could explain why
this works and the other doesn't, it'd be appreicated. See updated code below:



----------------------------------
Class Code:
----------------------------------

class SomeClass {
var broadcastMessage:Function;
var addListener:Function;

var _xml:XML;
function someClass () {
// Set up the AsBroadcaster
AsBroadcaster.initialize(this);
addListener(this);

// Create a reference to your class instance
_class = this;

loadXML();
} // End function

private function loadXML() {
// Do the XML Code and Load the file.
_xml = new XML();

// For some reason, the below statement is REQUIRED
// in order for it not to be "undefined" in the onLoad handler.
var _class = this;

_xml.onLoad = function (success) {
if (success) {
_class.broadcastMessage("onStatus","xml loaded");

// The following trace comes back undefined:
trace("class: " + _class)
} // End if
} // End function
_xml.load("file.xml");
} // End function
} // End class


----------------------------------
Frame Code:
----------------------------------
var myClass:SomeClass = new SomeClass();
var listener_obj:Object = new Object();

listener_obj.onStatus = function (msg:String) {
trace("msg: " + msg);
} // End function

myClass.addListener(listener_obj);

When you create a variable in a function, it will only exist as long as the
function runs, and gets deleted when the function ends. So the line inside the
constructor creates a variable 'class' that only exist in the instantiation,
outside that '_class' will be undefined.
The same goes for the line in the function loadXML(), but that's the place
where the var gets used, so now it's working.
You could also make the _class var a class variable and assign the reference
in the constructor, then the var would be available as long as the object
exists.

hth,
blemmo

Thank-you for your solution, however, that is actually a mistake in my post. In my actual project, i had defined the _class var outside of the constructor.

Inside call back handlers the class members are out of scope, including the var
_class you declared. In your code in the function loadXML() the declaration var
_class=this; creates a new (!) variable with a scope local to the function
holding a reference to the current object/class.