Displaying a Tree control as a pop up for a Flex PopUpButton control （转载）

The following example shows how you can use a Tree control as a PopUpButton control’s pop up in Flex <? xml version="1.0" encoding="utf-8" ?> <!--  http://blog.flexexamples.com/2008/02/26/displaying-a-tree-control-as-a-pop-up-for-a-flex-popupbutton-control/  --> < mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"         layout ="vertical"         verticalAlign ="middle"         backgroundColor ="white" >      < mx:Style >         Tree {            textAlign: left;            fontWeight: normal;        }     </ mx:Style >      < mx:XML  id ="mlb"  source ="mlb.xml"   />      < mx:ApplicationControlBar  dock ="true" >          < mx:PopUpButton  label ="Please select a team" >              < mx:popUp >                  < mx:Tree  id ="tree"                         dataProvider ="{mlb}"                         labelField ="@label"                         showRoot ="false"                         width ="200"                         rowCount ="8"   />              </ mx:popUp >          </ mx:PopUpButton >      </ mx:ApplicationControlBar > </ mx:Application >

转载于:https://www.cnblogs.com/wuhenke/archive/2010/01/09/1642794.html