ADG - custom renderer for first column

I ned to have a custom renderer for first column where name s are shown.
Here is my custom renderer:
package

import mx.containers.HBox;
import mx.controls.Text;
public class AssetReportNameRenderer extends HBox

private var _text:Text = new Text();
public function AssetReportNameRenderer()

super();
setStyle("backgroundAlpha", 0.0);

public override function set data(value:Object):void

super.data = value;
if (value)

_text.text = value.@Name;
addChild(_text);

My problem is that for parent nodes the text is shown after a plus sign,
but for children it starts from the left side regardless the hierarchy .
What am I missing?

Thanks