extjs Ext.tree.TreeEditor 节点编辑状态前后

//这里面添加代码 treeEditer = new Ext.tree.TreeEditor(   tree,   {allowBlank: false}   );    treeEditer.on("beforestartedit", function(treeEditer){   var tempNode = treeEditer.editNode;//将要编辑的节点   if(tempNode.isLeaf()){  return true;   }else{  return false;      }     });       treeEditer.on("complete", function(treeEditer){     alert(treeEditer.editNode.text);     });