How can you make a Datagrid's Image-based itemRenderer either visible or not, depending on the value

the description same title.  related post made little while ago: why image-based itemrenderer visible? datafield that's being used itemrenderer's column in case "ongoing", , want set itemrenderer and/or image true or false, depending on value of ongoing in row.  if itemrenderer label-based, i'm able set text different values, depending on that.  specific properties, visible, problematic though.  documentation i've found far on using states difficult follow, , i'm not sure apply here.  how do this?  current code, way follows:

 

<mx:datagridcolumn datafield="ongoing" id="ongoing" headertext="">
<mx:itemrenderer>
    <mx:component>
        <mx:image source="logo.jpg">
            <mx:script>
                <![cdata[
                    override public function set data(value:object):void {
                        super.data = value;
                        super.visible = (value.ongoing != 'false');
                    }
                ]]>
            </mx:script>
        </mx:image>
    </mx:component>
</mx:itemrenderer>
</mx:datagridcolumn>

 

i've tried working set visible override.  thanks!

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