R – Accessing the itemRenderer of a selected item

I have a TileList with thumbnail images. Under each thumbnail images I display the name of the image. I want to build rename functionality. So under the TileList is a "Rename selected image" button.

When this button is clicked, I would like to change the state of the itemRenderer component. The label underneath the image will change into a TextInput so that the user can type a new name. This is much like the Windows rename file functionality.

How can I access the itemRenderer of the selected image? How can I make it happen that it listens to the click event of the Rename button?

Some code:

<mx:TileList id="imageTileList" width="100%" height="100%" doubleClickEnabled="true"
 itemsChangeEffect="{tileListEffect}" dataProvider="{images}" 
 keyDown="{tileListKeyDownHandler(event)}"
 itemRenderer="com.n200.components.htmlElement.ImageTile" 
 columnWidth="128" rowHeight="128" itemDoubleClick="{insertImage()}" 
 horizontalScrollPolicy="off" verticalScrollPolicy="auto" />

<mx:LinkButton label="Rename selected image" labelPlacement="left"
    enabled="{imageTileList.selectedIndex>0}"
    styleName="rename24" click="{renameSelectedImage()}" />


<mx:Script>
<![CDATA[
    private function renameSelectedImage():void
    {
        // Need to access itemRenderer of selected image here
    }
]]>
</mx:Script>

The itemRenderer is just a mx:VBox with an mx:Image and a mx:Text.
In there is another mx:State where the mx:Text changes into a mx:TextInput:

<mx:states>
    <mx:State name="rename">
        <mx:RemoveChild target="{imageName}" />
        <mx:AddChild>
            <mx:TextInput id="newName" text="{originalName}" keyDown="{textInputKeyDownHandler(event)}" 
                width="100%" focusOut="{commit()}" focusThickness="0" />
        </mx:AddChild>
    </mx:State>
</mx:states>

<enterComponents:P200Image source="{imgFunction?imgFunction.fileId:null}" width="82" height="82" verticalAlign="bottom" stretch="true" />
<mx:Text id="imageName" text="{imgFunction.name}" selectable="false" truncateToFit="true" 
    textAlign="center" width="82" toolTip="{imgFunction.name}" />