RE: [flexcoders] Instantiation and setting problems

Fri, 02 Jun 2006 12:27:56 -0700


Where are you declaring these classes?


-----Original Message-----
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Suzy Lawson
Sent: Friday, June 02, 2006 12:01 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Instantiation and setting problems

I anyone else having issues trying to set values on objects for newly instantiated objects in an object graph with 3 or more layers?

I have the following:

ClassA {
public var classB : ClassB;
public var classC : ClassC;
}

ClassB {
public var classD : ClassD;
}

ClassC {
public var textVal : String='';
}

and i have a value sets in the ModelLocator (cairngorm) class like so:
public var allClassAs : ArrayCollection; public var selectedClassA : ClassA;

The problem is if I retrieve a single 'ClassA' from the collection of allClassAs using the ID of the selectedClassA, then try to make a call like this:
classA.classC.text="Whatever";

The mxml field I have bound to that value never displays and I get the following debug error.

error during evaluation
no such variable: classA.classC.textVal

This kind of makes sense since classC wasn't initialized yet, so even if I change ClassA to be:
ClassA {
public var classB : ClassB = new ClassB();  public var classC : ClassC = new ClassC(); }

I still get the same error. In the UI, if I click back, it appears correctly, but the first time it always fails. It seems like the set
(classA.classC.text="Whatever";) is getting called faster then the object can be initialized (constructed).

I've had similar problems when calling:
var myXML = new XML(event.target.data);
[EMAIL PROTECTED]"3232";

When I debug this, myXML is still null when the 2nd line is called. A work around is to instantiate the XML on startup so the XML is there before calling the set on @ID, but means more memory.

Anyone else hitting these issues? 






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