Stuck with GridItemRenderer

here problem. have s:griditemrenderer (the spark datagrid size use this, is: 100% x 100%) , here function in it:

override public function prepare(hasbeenrecycled:boolean):void {
    mylabel.text = width.tostring();
}

and here "mylabel" in it:

<s:label id="mylabel" x="0" y="0" width="100%" height="20" paddingbottom="0" paddingleft="0" paddingright="0" paddingtop="0"/>

so , problem is:

when drag side of window, , resize fine! mylabel updating, last column doesn't. when maximize window, nothing happend, "width" variable updated, mylabel.text doesn't. (so try use this.width too, isn't take effects)

the solution think (this me, think 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"

                                                  width="100%" height="100%"

                                                  clipandenablescrolling="true"

                                                  resize="griditemrenderer1_resizehandler(event)">

          <fx:script>

                    <![cdata[

                              import mx.events.resizeevent;

 

                              override public function prepare(hasbeenrecycled:boolean):void {

                                        lbl.text = column.grid.getcolumnwidth(column.columnindex).tostring();

                              }

 

                              protected function griditemrenderer1_resizehandler(event:resizeevent):void {

                                        column.grid.validatenow();

                              }

 

                    ]]>

          </fx:script>

          <s:label id="lbl" x="0" y="0" width="100%" height="40" backgroundcolor="#fa8888"/>

</s:griditemrenderer>

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