一个用来在datagrid里显示用的checkbox范例，flex编程

package renderers
{
import mx.controls.CheckBox;

public class DGCheckBox extends CheckBox
{
private var _data:Object;

override public function set data(value:Object):void
{
_data = value;
if(_data)
{
var dgld:DataGridListData = DataGridListData(listData);
selected = _data[dgld.dataField];
}
}

override public function get data():Object
{
return _data;

}


override protected function clickHandler(event:MouseEvent):void
{
super.clickHandler(event);
var dgld:DataGridListData = DataGridListData(listData);
_data[dgld.dataField] = selected;
owner.dispatchEvent(new Event("updated"));
}
}
}