How to access MXML component instance in ItemRenderer - apache-flex

Question

I have been developing an Adobe Flex (v3.5 Flex SDK) based application and I have a question on How we can access (call) a method written in MXML file (embeded in script tag) from the ItemRenderer file.
The MXML component has a datagrid and for one of the columns, the itemrenderer is my own custom item renderer.
In my custom item renderer, for some event I need to call a method which exist in its parent MXML component. How do we get access to its parent MXML instance ?
I have explored for this in google and found that we can access to 'data' object which refers to the dataProvider of the datagrid. But I wanted access to the instance of MXML component (so that I can call a method in it) which has the datagrid.
The AdvancedDataGridColumn in AdvancedDataGrid is like this
<mx:AdvancedDataGridColumn dataField="total" headerText="Total" width="120" itemRenderer="renderers.MyItemRenderer"/>
Here MyItemRenderer is a separate action script file.
Appreciate the response.
Thanks
Raagu

Answer 1

As Raghavendra Nilekani suggested This works:
TestGrid.mxml
<?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:Script>
<![CDATA[
[Bindable]
public var data:Array = [
{name:"name",value:"valeu1",timestamp:"423423"},
{name:"name1",value:"valeu2",timestamp:"423423"},
{name:"name2",value:"valeu3",timestamp:"423423"},
{name:"name3",value:"valeu5",timestamp:"423423"}
]
public function calculateValue():Number{
return Math.random();
}
]]>
</fx:Script>
<fx:Declarations>
</fx:Declarations>
<mx:VBox height="100%" width="100%">
<mx:AdvancedDataGrid dataProvider="{data}">
<mx:columns>
<mx:AdvancedDataGridColumn itemRenderer="ItemRenderer">
</mx:AdvancedDataGridColumn>
</mx:columns>
</mx:AdvancedDataGrid>
</mx:VBox>
</s:Application>
e ItemRendere.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:MXAdvancedDataGridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
focusEnabled="true"
addedToStage="mxadvanceddatagriditemrenderer1_addedToStageHandler(event)"
>
<fx:Script>
<![CDATA[
[Bindable]
var value:Number;
import mx.containers.VBox;
import mx.controls.AdvancedDataGrid;
protected function mxadvanceddatagriditemrenderer1_addedToStageHandler(event:Event):void
{
var grid:AdvancedDataGrid = ((AdvancedDataGrid)(this.owner));
var box:VBox = ((VBox)(grid.owner))
var comp:TestGrid = (TestGrid)(box.owner);
value = comp.calculateValue();
}
]]>
</fx:Script>
<s:Label id="lblData" top="0" left="0" right="0" bottom="0" text="{value}" />
</s:MXAdvancedDataGridItemRenderer>
Anyway I agree with zenbeni that this lead to a not reausable item renderer.