CombBox itemMatchingFunction

Question

I have extended a ComboBox for 2 major reasons, specialized skinning and to provide for custom item matching.  I'm having a problem with the itemMatchingFunction.  I can see the function being invoked and the appropriate items included and excluded from the resultant vector.  But what is being displayed is still the entire list if items in the data provider.  Any comments, questions or suggestions would be appreciated!
Thanks,
Brenda
  Here are some snippets of my code:
        public function FilteredComboBox() {
            super();
            this.openOnInput = true;
            this.itemMatchingFunction = matchingFunction;
        public function matchingFunction(cb:ComboBox, text:String):Vector.<int> {
            var results:Vector.<int> = new Vector.<int>;
            var item:String;
            var entered:String = text.toLowerCase();
            var itemIdx:int;
            for(var idx:int = 0; idx < cb.dataProvider.length; idx++) {
                item = cb.dataProvider.getItemAt(idx) as String;
                item = item.toLowerCase();
                itemIdx = item.indexOf(entered);
                if(item.indexOf(entered) > -1) {
                    results.push(idx);
            return results;

Answer 1

Try the below sample code for the scenario required. This might be helpful.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import spark.events.IndexChangeEvent;
            import spark.events.TextOperationEvent;
            [Bindable]
            private var arrC:ArrayCollection = new ArrayCollection([{label:'Ronak'},{label:'Virat'},{label:'Ronaksdfsdfsf'},{label:'Ronaksdf sdf'},{label:'Ronak'},{label:'Ronak'},{label:'Ronak'},{label:'Ronak'},{label:'Ronak'},{lab el:'Ronak'},{label:'Ronak'}]);
            private var flag:Boolean = true;
            protected function cb_changeHandler():void
                if(flag == true)
                    cb.textInput.addEventListener(TextOperationEvent.CHANGE,changeHandler);
                    flag = false;
                // TODO Auto-generated method stub
            private function changeHandler(e:*):void
                cb.textInput.removeEventListener(TextOperationEvent.CHANGE,changeHandler);
                arrC.filterFunction = doFilter;
                arrC.refresh();
                flag = true;
            private function doFilter(item:Object):Boolean
                if(String(item.label).toLowerCase().indexOf(cb.textInput.text.slice(0,cb.textInput.select ionAnchorPosition).toLowerCase())>-1)
                    return true;
                return false;
        ]]>
    </fx:Script>
    <s:ComboBox id="cb" dataProvider="{arrC}"  updateComplete="cb_changeHandler()"/>
</s:Application>