[flexcoders] Metamorphosing RadioButtonGroup

Wed, 31 Aug 2005 04:43:29 -0700

Title: Message
I have been trying to dynamically create RadioButtonGroup (due to the problem I posted earlier). I managed to create the group but getting access to the RadioButtonGroup object seems to be quite hard. I create the group during initialize event, but when I try to access the group, it seems to be totally different object. For example, if I set id property for the group during initialization it has disappeared when accessed later.
 
 Here's some sample code demonstrating the problem:
 
RadioProblem.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml"
 xmlns:my="*">
 <my:RadioGroup width="500" height="200"/>
</mx:Application>
 
RadioGroup.as:
import mx.controls.*;
import mx.containers.*;
 
class RadioGroup extends Panel
{
 public var radioTrue;
 public var radioFalse;
 public var radioUnknown;
 public var radioGroup;
 public var label1;
 public var label2;
 
 public function RadioGroup()
 {
  super();
  addEventListener( "initialize", mx.utils.Delegate.create( this, onInitialization ) );
  addEventListener( "creationComplete", mx.utils.Delegate.create( this, onCreationComplete ) );
 }
 
 private function onInitialization()
 {
  var id:String = getId();
  
  radioGroup = createChild( RadioButtonGroup, undefined, { id:id } );
  radioTrue = createChild( RadioButton, undefined, { groupName:id, id:"radioTrue", marginRight:20 } );
  radioFalse = createChild( RadioButton, undefined, { groupName:id, id:"radioFalse", marginRight:20 } );
  radioUnknown = createChild( RadioButton, undefined, { groupName:id, id:"radioUnknown", marginRight:20 } ); 
  label1 = createChild( Label, undefined, {} );
  label2 = createChild( Label, undefined, {} );

  label1.text = "label1: " + radioGroup.id; // "myId"
 }
 
 private function onCreationComplete()
 {
  label2.text = "label2: " + radioGroup.id; // undefined
 }
 
 private function getId():String
 {
  return "myId";
 }
}


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