Spark datagrid that shows the new value and that it previously was

Question

Im trying to create a item renderer for a spark datagrid that shows the new  value and that it previously was and I am comparing in the set data, the problem I am having is that in teh set data I am frequently getting data from other rows (I know this because of virtual renderders), it there a way round this?
<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
                    xmlns:s="library://ns.adobe.com/flex/spark"
                    xmlns:mx="library://ns.adobe.com/flex/mx"
                    currentState="unmodified">
    <fx:Script>
        <![CDATA[
            override public function set data(value:Object):void
                if(data){
                    if(super.data.margin != value.margin  && super.data.margin){
                        oldValue.text = '(' + super.data.margin + ')';
                    }else{
                        oldValue.text == '';
                super.data = value;
                stroke.visible = false;
                fillRect.visible = false;
                if(data){
                    if(this.data.isModifiedClientSide){
                        currentState = "modified";
                        fill.color = 0xddddff;
                        stroke.visible = true;
                        fillRect.visible = true;
                    else{
                        fill.color = 0xffffff;
                        stroke.visible = false;
                        currentState = "unmodified";
                        fillRect.visible = true;
        ]]>
    </fx:Script>
    <s:states>
        <s:State name="modified"/>
        <s:State name="unmodified"/>
    </s:states>
    <s:Rect top="0" left="0" right="0" bottom="0" id="fillRect" >
        <s:fill><s:SolidColor id="fill"  color="0xFFffff"  /></s:fill>
    </s:Rect>
    <s:Rect left="1" top="1" right="0" bottom="0" id="stroke">
        <s:stroke >
            <s:SolidColorStroke color="0x000099" weight="1"  >
            </s:SolidColorStroke>
        </s:stroke>
    </s:Rect>
    <s:HGroup horizontalAlign="center" verticalAlign="middle" top="0" left="0" right="0" bottom="0" paddingRight="5">
        <s:Label text="{data.margin}" width="50%" textAlign="right">
        </s:Label>
        <s:Label  id="oldValue" color="0xff0000" width="50%"  textAlign="right">
        </s:Label>
    </s:HGroup>
</s:GridItemRenderer>

Answer 1

If I recall correctly, you are talking about the default start page. To check if this is correct, type '''about:home''' in the awesome bar. If this is the same as your homepage, it will still be there when you update.