flex tree 获得选中当前节点的所有父节点

flex tree 获得选中当前节点的所有父节点

第一，你在制作数据源的时候，需要为子节点的数据源指定一个属性parent
private function packQuanXianTreeData(quanXianTreeDataTemp:ArrayCollection):void

   {

    var quanXianTreeData_:ArrayCollection = new ArrayCollection();

    if(quanXianTreeDataTemp.length>0)

    {

     for each(var obj1:Object in quanXianTreeDataTemp)

     {

      if(obj1.hasOwnProperty('levels')&&obj1['levels'] == 1)

      {

       quanXianTreeData_.addItem(obj1);

      }

      

     }

     var sort:Sort = new Sort();

     sort.fields = [new SortField("sort")];

     quanXianTreeData_.sort = sort;

     quanXianTreeData_.refresh();

     for each(var obj2:Object in quanXianTreeDataTemp)

     {

      var children:ArrayCollection = new ArrayCollection();

      for each(var obj3:Object in quanXianTreeDataTemp)

      {

       if(obj3.hasOwnProperty('pid')&&obj3['pid']==obj2['id'])

       {

        obj3.parent = obj2;

        children.addItem(obj3);

       }

      }

      if(children.length>0)

      {

       children.sort = sort;

       children.refresh();

       obj2.children = children;

      }

     }

    }

    this.quanXianTreeData = quanXianTreeData_;

   }第二，获得父节点的方法。参数obj:Object为选中的节点，参数ac:ArrayCollection为装父节点的集合。
private function getCondition(obj:Object,ac:ArrayCollection):void

   {

    var parent:Object;

    if(obj.hasOwnProperty("parent")&&obj['parent']!=null)

    {

     parent = obj['parent'];

    }

    ac.addItemAt(obj,0);

    if(parent!=null)

    {

     getCondition(parent,ac);

    }

   }

var parentData = tree.dataDescriptor.getParent(tree.selectedItem, tree.dataProvider);