[flexcoders] problem with repeater and reference with repeted-itself component

[lruinelli]

Hello,

I have a nested repeater...
I have a combobox for each region (see the XML in my code)...under the
combobox I wolud like to list the crops available in the selected
region ...when the user change the value of the combo, the checkox of
the combo are to be updated..this is my code, and the question is how
setting the value of the cb index:

...THANKS A LOT

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
layout="absolute" xmlns:ns1="*">
 <mx:VBox width="50%">
  <mx:Repeater id="rep1" dataProvider="{src.region}">
   <mx:ComboBox  id="cb" dataProvider="{src.region}" 
labelField="@descr"/>
    <mx:Repeater id="rep2" dataProvider="{cb[???????].selectedItem.crop}">
<!--??????? how identify the actual index of the repeted component cb-->
     <mx:CheckBox label="[EMAIL PROTECTED]"/>
    </mx:Repeater>                                      
   </mx:Repeater>                                       
  </mx:VBox>
        
  <mx:XML xmlns="" id="src">
   <table_region>
    <region descr="Flevoland">
     <crop descr="Potato"/>                                     
     <crop descr="Grass"/>                                                  
</region> 
    <region descr="Midi-Pyrenees">                                           
<crop descr="Potato"/>                                     
     <crop descr="Carrot"/>                                                  
<crop descr="Sugarbeet"/>                                          
   </region>                            
    <region descr="Brandenburg">                                             
<crop descr="Potato"/>                                     
     <crop descr="Carrot"/>                                                 
</region>                           
   </table_region>      
  </mx:XML>     
</mx:Application>