ClassFactory的properties妙用

1）UITextField与label,使用label显不出来

复制代码 代码如下:
package com.citigroup.presentation.csa
{
import flash.events.MouseEvent;

import mx.controls.Label;
import mx.controls.advancedDataGridClasses.AdvancedDataGridHeaderRenderer;
import mx.core.UITextField;
import mx.events.FlexEvent;

public class GroupHeaderRenderer extends AdvancedDataGridHeaderRenderer
{
public var children:Array=[];
public var expand:Boolean=true;
private var l:UITextField;
public function GroupHeaderRenderer()
{
super();
l=new UITextField();
l.text="[-]";
l.addEventListener(MouseEvent.CLICK,toggle);
addChild(l);
this.addEventListener(FlexEvent.CREATION_COMPLETE,init);

}
private function init(event:FlexEvent):void{
if(expand){
l.text="[-]";
}else{
l.text="[+]";
toggleChildren(false);
}
this.removeEventListener(FlexEvent.CREATION_COMPLETE,init);
}
override public function set data(value:Object):void{
super.data = value;
this.setStyle("color","0xF9F088");
this.setStyle("fontWeight","bold");
this.setStyle("textAlign","left");
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void{
super.updateDisplayList(unscaledWidth,unscaledHeight);
label.x=0;
l.x=label.x+label.width;
l.y=label.y;
}

private function toggle(event:MouseEvent):void{
if(l.text=="[+]"){
l.text="[-]";
toggleChildren(true);
}else{
l.text="[+]";
toggleChildren(false);
}
}
private function toggleChildren(visible:Boolean):void{
if(children.length<=1) return;
for(var i:int=1;i<children.length;i++){
children[i].visible=visible;
}
}
}
}

public function genAdgColumn(headerText:String,dataField:String,width:Number=100):AdvancedDataGridColumn{
var col:AdvancedDataGridColumn=new AdvancedDataGridColumn();
col.headerText=headerText;
col.dataField=dataField;
col.width=width;
return col;
}
public function genAdgColumnGroup(headerText:String,dataField:String,children:Array,expand:Boolean=true):AdvancedDataGridColumnGroup{
var group:AdvancedDataGridColumnGroup=new AdvancedDataGridColumnGroup();
group.headerText=headerText;
group.dataField=dataField;
<span style="color:#ff0000;">var cf:ClassFactory=new ClassFactory(GroupHeaderRenderer);
cf.properties ={'children':children,'expand':expand};
group.headerRenderer=cf;
group.children=children;
return group;
}