XML+JS创建树形菜单

  • 发布于:2020-08-31
  • 206 人围观
简单说明:

思路:
从数据岛menuXML中读取数据,从树的根节点开始分析树,
利用 hasChildNodes() [方法:是否含有子节点 ] 判断当前
节点是否有子节点,如果有子节点继续向下分析 childNodes
[对象:子节点对象集合] ,否则返回当前分析结果(树结点对象)。

主要的函数:
createTree(thisn /*树结点*/ , sd/*树深度*/)
代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> DSTree </TITLE>
<META NAME="Author" CONTENT="sTarsjz@hotmail.com" >
<style>
body,td{font:12px verdana}
#treeBox{background-color:#fffffa;}
#treeBox .ec{margin:0 5 0 5;}
#treeBox .hasItems{font-weight:bold;height:20px;padding:3 6 0 6;margin:2px;cursor:hand;color:#555555;border:1px solid #fffffa;}
#treeBox .Items{height:20px;padding:3 6 0 6;margin:1px;cursor:hand;color:#555555;border:1px solid #fffffa;}
</style>
<base href="http://vip.5d.cn/star/dstree/" />
<script>
//code by star 20003-4-7
var HC = "color:#990000;border:1px solid #cccccc";
var SC = "background-color:#efefef;border:1px solid #cccccc;color:#000000;";
var IO = null;
function initTree(){
 var rootn = document.all.menuXML.documentElement;
 var sd = 0;
 document.onselectstart = function(){return false;}
 document.all.treeBox.appendChild(createTree(rootn,sd));
}
function createTree(thisn,sd){
 var nodeObj = document.createElement("span");
 var upobj = document.createElement("span");
 with(upobj){
  style.marginLeft = sd*10;
  className = thisn.hasChildNodes()?"hasItems":"Items";
  innerHTML = "<img src=expand.gif class=ec>" + thisn.getAttribute("text") +"";
 
  onmousedown = function(){
   if(event.button != 1) return;
   if(this.getAttribute("cn")){
    this.setAttribute("open",!this.getAttribute("open"));
    this.cn.style.display = this.getAttribute("open")?"inline":"none";
    this.all.tags("img")[0].src = this.getAttribute("open")?"expand.gif":"contract.gif";
   }
   if(IO){
    IO.runtimeStyle.cssText = "";
    IO.setAttribute("selected",false);
   }
   IO = this;
   this.setAttribute("selected",true);
   this.runtimeStyle.cssText = SC;
  }
  onmouseover = function(){
   if(this.getAttribute("selected"))return;
   this.runtimeStyle.cssText = HC;
  }
  onmouseout = function(){
   if(this.getAttribute("selected"))return;
   this.runtimeStyle.cssText = "";
  }
  oncontextmenu = contextMenuHandle;
  onclick = clickHandle;
 }
 if(thisn.getAttribute("treeId") != null){
  upobj.setAttribute("treeId",thisn.getAttribute("treeId"));
 }
 if(thisn.getAttribute("href") != null){
  upobj.setAttribute("href",thisn.getAttribute("href"));
 }
 if(thisn.getAttribute("target") != null){
  upobj.setAttribute("target",thisn.getAttribute("target"));
 }
 nodeObj.appendChild(upobj);
 nodeObj.insertAdjacentHTML("beforeEnd","<br>")
 if(thisn.hasChildNodes()){
  var i;
  var nodes = thisn.childNodes;
  var cn = document.createElement("span");
  upobj.setAttribute("cn",cn);
  if(thisn.getAttribute("open") != null){
   upobj.setAttribute("open",(thisn.getAttribute("open")=="true"));
   upobj.getAttribute("cn").style.display = upobj.getAttribute("open")?"inline":"none";
   if( !upobj.getAttribute("open"))upobj.all.tags("img")[0].src ="contract.gif";
  }
 
  for(i=0;i<nodes.length;cn.appendChild(createTree(nodes[i++],sd+1)));
  nodeObj.appendChild(cn);
 }
 else{
  upobj.all.tags("img")[0].src ="endnode.gif";
 }
 return nodeObj;
}
window.onload = initTree;
</script>
<script>
function clickHandle(){
 // your code here
}
function contextMenuHandle(){
 event.returnValue = false;
 var treeId = this.getAttribute("treeId");
 // your code here
}
</script>
</HEAD>
<BODY>
<xml id=menuXML>
<?xml version="1.0" encoding="GB2312"?>
<DSTreeRoot text="根节点" open="true" href="http://" treeId="123">
 
 <DSTree text="技术论坛" open="false" treeId="">
  <DSTree text="5DMedia" open="false" href="http://" target="box" treeId="12">
   <DSTree text="网页编码" href="http://" target="box" treeId="4353" />
   <DSTree text="手绘" href="http://" target="box" treeId="543543" />
   <DSTree text="灌水" href="http://" target="box" treeId="543543" />
  </DSTree>
  <DSTree text="BlueIdea" open="false" href="http://" target="box" treeId="213">
   <DSTree text="DreamWeaver &amp; JS" href="http://" target="box" treeId="4353" />
   <DSTree text="FlashActionScript" href="http://" target="box" treeId="543543" />
  </DSTree>
  <DSTree text="CSDN" open="false" href="http://" target="box" treeId="432">
   <DSTree text="JS" href="http://" target="box" treeId="4353" />
   <DSTree text="XML" href="http://" target="box" treeId="543543" />
  </DSTree>
 </DSTree>
 <DSTree text="资源站点" open="false" treeId="">
  <DSTree text="素材屋" href="http://" target="box" treeId="12" />
  <DSTree text="桌面城市" open="false" href="http://" target="box" treeId="213">
   <DSTree text="壁纸" href="http://" target="box" treeId="4353" />
   <DSTree text="字体" href="http://" target="box" treeId="543543" />
  </DSTree>
  <DSTree text="MSDN" open="false" href="http://" target="box" treeId="432">
   <DSTree text="DHTML" href="http://" target="box" treeId="4353" />
   <DSTree text="HTC" href="http://" target="box" treeId="543543" />
   <DSTree text="XML" href="" target="box" treeId="2312" />
  </DSTree>
 </DSTree>
</DSTreeRoot>
</xml>
<table style="position:absolute;left:100;top:100;">
<tr><td id=treeBox style="width:400px;height:200px;border:1px solid #cccccc;padding:5 3 3 5;" valign=top></td></tr>
<tr><td style="font:10px verdana;color:#999999" align=right>by <font color=#660000>sTar</font><br> 2003-4-8</td></tr>
</table>
</BODY>
</HTML>
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