FLEX4 Tree代码触发节点选择

TREE定义

<mx:Tree id="deptTree" width="200" height="98%" dataProvider="{Managers.getOrgManager().groupXML}"
				 labelField="@name"  showRoot="false" fontSize="20" change="deptChangeEvent(event)" />

			private function initUI():void {
				deptTree.expandChildrenOf(deptTree.dataProvider[0],true); 
				deptTree.selectedIndex = 0;
				var event:ListEvent = new ListEvent(ListEvent.CHANGE); 
				deptTree.dispatchEvent(event);
			}