TabEnabled property issue.

Question

I have problem with changing value of tabEnabled property in runtime. My goal is to prevent user setting focus on components by tab key in some specific situations.
I will start from sample code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">
     <mx:Script>
          <![CDATA[
               [Bindable]
               private var flag : Boolean = false;
          ]]>
     </mx:Script>
     <mx:Button/>
     <mx:ComboBox tabEnabled="{flag}"/>
     <mx:ComboBox tabEnabled="{flag}"/>
     <mx:ComboBox tabEnabled="{flag}"/>
     <mx:ComboBox tabEnabled="{flag}"/>
     <mx:Button>
          <mx:click>
               <![CDATA[
                    flag = !flag;
               ]]>
          </mx:click>
     </mx:Button>
</mx:Application>
If initially value of tabEnabled is set to true, then I can change it in runtime many times without any problems. But if I set initially value of tabEnabled to false then even if I change it to true in runtime, component behaves as if it had this property turned off - can't set focus using tab key.
Maybe solution for this problem is very simple, but actually I have no idea how to solve it, so I'm looking forward on your help.
BTW. I am using Flex SDK 3.5 FP 10.1.

Answer 1

I tried to override tabEnabled setter:
          public override function set tabEnabled(enabled:Boolean):void {
               if(!initialized && !enabled) {
                    super.tabEnabled = true;
                    addEventListener(FlexEvent.CREATION_COMPLETE, function() : void {
                         tabEnabled = enabled;
               } else {
                    super.tabEnabled = enabled;
but it didn't help. This is very strange...