Tree display not updating when adding first node to expanded node

hi

 

please have @ following code. reproduce faulty behaviour have expand item, click "add" button , observe, nothing happens. collapsing, expanding node shows added children. use flex 3.5.0

 

is bug in sdk or missing auto update switch?

 

thanks!!

 

<?xml version="1.0" encoding="utf-8"?> <mx:application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal"       minwidth="955" minheight="600"      creationcomplete="run()">            <mx:tree id="tree" width="300" height="500" labelfield="name" />            <mx:button label="add" click="onclickadd()" />            <mx:script>           <![cdata[                import mx.collections.arraycollection;                import mx.utils.objectproxy;                                protected var itm1:object;                                                protected function run() : void                {                     var ac:arraycollection = new arraycollection();                                          this.itm1 = new objectproxy({name:"1", children:new arraycollection()});                     ac.additem(this.itm1);                     this.tree.dataprovider = ac;                }                                                protected function onclickadd() : void                {                     this.itm1.children.additem({name:"child"});                }           ]]>      </mx:script>       </mx:application>   

hi,

 

it work if collapse , expand node programmatically after adding child.  there has better way.

protected function onclickadd() : void
{
     this.itm1.children.additem({name:'child'});
     if(tree.isitemopen(itm1))
     {
          tree.expanditem(itm1,false);
          tree.expanditem(itm1,true);
     }
}

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