Great response, thank you.
Gordon Smith wrote:
> You need to attach the Bob instance to the display list before accessing
> its children. This works:
>
> public function someFunc():void
> {
> var b:Bob = new Bob();
> addChild(b);
> trace(b.test1.text);
> }
>
> A UIComponent constructor creates a new instance but doesn't initialize
> it. After executing
>
> var b:Bob = new Bob();
>
> a Bob instance exists, but it has parent and no children. As soon as you
> attach a new instance to a parent, it then creates its children, and
> when they are attached they create their children, etc. In this way the
> tree grows downward recursively.
>
> One reason we designed it this way is so that between the 'new' and the
> addChild(), you can set properties and styles on the instance which then
> affect which children get created.
>
> For example, suppose you had a Clock component with had two modes,
> analog and digital, which require different children to display. Then
> you could write
>
> var clock:Clock = new Clock();
> clock.mode = "digital";
> addChild(clock);
>
> and then the hands and the 12 TextFields to display the hours around the
> analog clock wouldn't need to be created; you could delay creating them
> until you set clock.mode = "analog".
>
> - Gordon
>
>
> -----Original Message-----
> From: [email protected] [mailto:[EMAIL PROTECTED] On
> Behalf Of Trey Long
> Sent: Thursday, January 26, 2006 9:35 AM
> To: [email protected]
> Subject: [flexcoders] MXML mixed with AS is null
>
> This problem seems obvious, but I didn't get any hits when I searched
> so...
>
> I have an MXML application, A.mxml;
> and an MXML component C.mxml.
>
> There seems to be an initialization problem when I attempt to create
> that MXML component C from within a <mx:script> tag in application A. It
>
> seems that the label in component C, test1, isn't initialized at that
> point.
>
> I know this is hard to follow, but if anyone else thinks they know what
> I am talking about please let me know.
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Application xmlns:mx="http://www.macromedia.com/2005/mxml"; xmlns="*"
> xmlns:local="package1.*" creationComplete="someFunc();">
>
> <mx:Script>
> <![CDATA[
> import flash.util.trace;
>
> public function someFunc() {
> var b:Bob = new Bob();
> //trace(b.test1.text);
> }
>
> ]]>
> </mx:Script>
> </mx:Application>
>
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Canvas xmlns:mx="http://www.macromedia.com/2005/mxml"; xmlns="*">
> <mx:Label id="test1" text="TEST STRING" />
> </mx:Canvas>
>
>
>
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