flash actionscript: Hello Forum.

I'm again in a similar situation: A function can't see another function
because of scope reasons. How do I solve this one? I can't figure out how to
make the loadFlvPath() function see the traceMe() function... the problem is
that recXML is an XML Object through which I can't pass through a "this"....
Any ideas from the OOP MAsters out there?

Many thanks

S.


/////////////////////////////////////

class com.website.VideoManager {

//Various vars... [...]

public function VideoManager(){
connectToDB();
}

private function connectToDB(){

//various xml and loadvar commands [...]

sendLV.sendAndLoad(con,recXML);
recXML.onLoad = loadFlvPath;
}

private function loadFlvPath(success){
if(success){
traceMe(); //doesn't see the function traceMe >> How do I get this to work?
}
}
private function traceMe(){
trace("me");
}
}

Normally - this is what I'd do - why couldn't you pass recXML this way?
Otherise - is it possible to make the trace function _root or as a member of a
base class that all of your classes are derived from? or even a static member
of a global singleton class?

class com.website.VideoManager
{

//Various vars... [...]

public function VideoManager():Void
{
this._connectToDB();
}

private function _connectToDB():Void
{
//various xml and loadvar commands [...]
recXML.onLoad = function( bSuccess:Boolean ) { _loadFlvPath( recXML,
bSuccess ); }
sendLV.sendAndLoad( con, recXML );
}

private function _loadFlvPath( bSuccess:XML ):Void
{
if( bSuccess )
{
this._traceMe(); //doesn't see the function traceMe >> How do I get this to
work?
}
}

private function _traceMe():Void
{
trace("me");
}
}// end of class

Hope this helps, I don't have too much information to go on.

thanks - Fruber.

Hi Fruber

Thanks for your reply.

I tried your code but it has the same problem. Basically once I'm in the
recXML.onLoad part there is no reference to the class itself anymore. So I
can't call any of the functions of the VideoManager class.

Unfortunately I don't know enought about OOP so the static concept is a
little foreign to me. Maybe I should go back to the books before proceeding.
Also I'm not sure what you're refering to as the base class. If there's a
simple way of putting it I'd appreciate it if you can guide me into a
direction...

sk.

//////// >> your suggestion was this: ///////////

recXML.onLoad = function( bSuccess:Boolean ) {
_loadFlvPath( recXML, bSuccess ); ///>> recXML is undefined when I
trace it. and _loadFlvPath can again not be triggered cause it's in a different
scope.
}

Now, instead of a local reference as in your previous post, you use a static
reference:

class com.website.VideoManager {

// class property
private static var thisObj:com.website.VideoManager;

public function VideoManager(xmlPath:String){
thisObj=this; // setting the static reference
connectToDB(xmlPath);
}

private function connectToDB(xmlPath:String){
// do something here
myXML.onLoad = loadFlvPath;
}

private function loadFlvPath(success:Boolean){
if(success){
// do something here
}
thisObj.traceMe(); // Now it does see the function
}

private function traceMe(){
trace("Called");
}
}

Inside the loadFlvPath method, when parsing the XML you need to use the static
reference too:
thisObj.myXML.firstChild.chilNodes.length // example

Very interesting! thank you very much. If you a little bit of time would you
mind writing a little comment about "static". Advantages / Disadvantages /
Guidlines / Things to look out for...

Thanks again.

Best

stephan

I'm kindda sorry to jump in again, but I Would like to over an other solution,
without contradicting LuigiL:

class com.website.VideoManager {

//Various vars... [...]

public function VideoManager(){
connectToDB();
}

private function connectToDB(){

//various xml and loadvar commands [...]


// Here you set loadFlvPath to be executed onLoad of sendLV.
// That means (like with your movieclip example before) that your function
// will be executed in the scope of the Object that calls the event.
// That woul be sendLV. But sendLV does not know (yet) of the object that
// created it and is member of your class. So when working with build-in
ClassObject
// that define onEvent handlers like loadVars or Moviecliip... It is alwasy a
// good idea to assign a reference to the creating Object to the
event-handling one.
// Lets call it myMaster.

sendLV.myMaster = this;
sendLV.sendAndLoad(con,recXML);
recXML.onLoad = loadFlvPath;

}

private function loadFlvPath(success){
if(success){

// so this is sendLV and myMaster is the (back-)reference to the object, that
is a member of your class.
// so traceMe should execute on that Object.

this.myMaster.traceMe();
}
}
private function traceMe(){
trace("me");
}
}

I'm suggesting that, because the problem with the static reference could be,
that the static property would be overridden by the next object that is created
by that class.

Hi

Thanks again. I got your solution to work finally...

I ended up doing it this way: (same idea as you've suggested)

[...]
sendLV.sendAndLoad(con,recXML);
var thisObj:VideoPath=this; //reference to current class
recXML.onLoad = function( bSuccess:Boolean ) {
thisObj.loadFlvPath( this,bSuccess );
}
[...]

the recXML.onLoad wasn't able to see the thisObj if I set it as a propery of
the sendLV.

So a static properties of a class is reset everytime a class is instantiated?
and the previous objects derived from that class will take over the most
current value of the static property? Do I understand that correctly?

Thanks to everyone. This has been extrememly helpful.

Stephan