北京 企业网站开发今日头条新闻最新事件
1、在开发中我遇到一种需求，就是我点击树的折叠图标一下向下打开，当我单击该树的最后一个节点（点击的是节点，不是展开图片），联动的打开另一颗树，发现
树中selectitems和getparentitem是无法选中该树中为展示出来的节点，因为该方式只适合人机操作的时候使用，后期发现只能用代码的方式，在每个节点中添加父节点的属性，利用代码的方式打开
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
minWidth="955" minHeight="600">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.ListEvent;
private var _templateItem : Object = null;
private var _flag : Boolean = false;
[Bindable]
private var node : ArrayCollection = new ArrayCollection([
{name: '张',age:12,misid:'11',id:'01',children:[
{name : "张三",age : 12 ,misid:'123',id:'1',parent:'01',children:
[
{name : "张三1",age : 12,id:'11',misid:null,parent:'1' },
{name : "张三2",age : 12,id:'12',misid:'121321',parent:'1' },
{name : "张三3",age : 12,id:'13',misid:null,parent:'1' }
]
},
{name : "张四",age : 12 ,misid:'123',id:'2',parent:'01',children:
[
{name : "张四a",age : 12 ,id:'21',misid:'121321',parent:'2' },
{name : "张四d",age : 12 ,id:'22',misid:null,parent:'2'},
{name : "张四f",age : 12 ,id:'23',misid:null,parent:'2'},
{name : "张四g",age : 12 ,id:'24',misid:'121321',parent:'2'}
]
}
]}
]);
[Bindable]
private var node1 : ArrayCollection = new ArrayCollection([
{name: '李',age:12,misid:'11',gisId:'01',children:[
{name : "李三",age : 12 ,misid:'123',gisId:'1',children:
[
{name : "李三1",age : 12,gisId:'11',misid:null },
{name : "李三2",age : 12,gisId:'12',misid:'121321' },
{name : "李三3",age : 12,gisId:'13',misid:null }
]
},
{name : "李四",age : 12 ,misid:'123',gisId:'2',children:
[
{name : "李四a",age : 12,gisId:'21',misid:'121321' },
{name : "李四d",age : 12,gisId:'22' ,misid:null},
{name : "李四f",age : 12,gisId:'23' ,misid:null},
{name : "李四g",age : 12,gisId:'24',misid:'121321'}
]
}
]
}
]);
/**
* gisTree点击事件
*/
private function tree_itemClick( event:Event):void
{
var obj :Object = gisTree.selectedItem;
gisTree.expandItem(obj,true);
var gisId:String = obj.id;
var misRootNode:Object = (misTree.dataProvider as ArrayCollection).getItemAt(0);
if(misRootNode.gisId==gisId)
{
misTree.expandItem(misRootNode,true);
}
else
{
if(misRootNode.children!=null)
{
openMisTree(misRootNode.children,gisId);
}
}
}
/**
* 根据gis节点打开mis节点(从上级到下级打开)
*/
private function openMisTree(misNode:Object,gisId:String):void
{
for each(var node:Object in misNode)
{
if(node.gisId==gisId)
{
misTree.expandItem(node,true);
}
else
{
openMisTree(node.children,gisId);
}
}
}
/**
* misTree点击事件
*/
protected function misTreeItemClickHandler(event:ListEvent):void
{
var gisId :String = '2';//目的打开张四
var gisTreeRootNode : Object = (gisTree.dataProvider as ArrayCollection).getItemAt(0);
if(gisTreeRootNode.id==gisId)
{
misTree.expandItem(gisTreeRootNode,true);
}
else
{
if(gisTreeRootNode.children!=null&&gisTreeRootNode.children.length>0)
{
openGisTreeItem(gisTreeRootNode.children,gisId);
}
}
}
private function openGisTreeItem(children:Object,gisId:String):void
{
for each(var node:Object in children)
{
if(node.id==gisId)
{
var parents:Array=new Array();
parents.push(node);
getGisTreeParent(parents,node.parent);
gisTree.openItems=parents;
// gisTree.selectedItem = node;
// gisTree.expandItem(gisTree.getParentItem(node),true);
// gisTree.expandItem(node,true);
}
else
{
openGisTreeItem(node.children,gisId);
}
}
}
private function getGisTreeParent(listParentNode:Array,parentId:String):void
{
for each(var nodeItem:Object in node)
{
if(nodeItem.id==parentId)
{
listParentNode.push(nodeItem);
getGisTreeParent(listParentNode,nodeItem.parent);
}
}
}
]]>
</fx:Script>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
<mx:HBox width="100%" height="100%" horizontalAlign="center">
<mx:Tree id="gisTree"
labelField="name"
dataProvider="{node}"
width="200" itemClick="tree_itemClick(event)"/>
<mx:Tree id="misTree"
labelField="name"
dataProvider="{node1}"
width="200" itemClick="misTreeItemClickHandler(event)"/>
</mx:HBox>
</s:Application>