<html>
<head>
<title>phpTree</title>
<style>
body{
margin:0px;
}
#dragDiv{position:absolute;display:none;background-color:#3366cc;color:#ffffff;}
.title{border:0px;font-size:16px;}
.node{padding-left:20px;overflow:hidden;}
.icon{display:inline;margin-right:5px;cursor:pointer;}
</style>
<script type="text/javascript" src="tree.js"></script>
<script type="text/javascript" language="javascript">
TreeView = function(Root)
{
this.root = document.getElementById(Root);
var _this = this;
if(this.root == null)
{
alert('Invalid tree root!');
return false;
}
this.init = function()
{
document.onmousedown = _this.DragStart;
document.onmouseup = _this.DragStop;
document.onmousemove = _this.Draging;
}
//每个nodeId必须是唯一的合法的html元素Id，且不能以_title,_icon,_child之类的结尾
this.addNode = function(parentId,nodeId,nodeName,link)
{
var oParent = document.getElementById(parentId);
//父节点合法不？
if(oParent == null) return;
var oNode = document.createElement('div');
oNode.id = nodeId;
oNode.className = 'node';
//真够费劲的
oNode.innerHTML = "<div id='"+nodeId+"_title' class='title'><span class='icon' onclick='Tree.fold(this)'>-</span>"+nodeName+"</div>";
oParent.appendChild(oNode);
}
this.DragStart = function(e)
{
e = e || window.event;
this.DragObj = e.target || e.srcElement;
//是否是合法的节点？
if(this.DragObj.className != 'title')return;
this.tmpNode = document.getElementById('dragDiv');
this.tmpNode.innerHTML = this.DragObj.lastChild.nodeValue;
this.DragObj = this.DragObj.parentNode;
//debug('drag start:'+this.DragObj.id+':'+this.DragObj.className);
this.indrag = true;
this.x = e.pageX || (e.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));
this.y = e.pageY || (e.clientY + (document.documentElement.scrollTop || document.body.scrollTop));
this.left = parseInt(this.tmpNode.offsetLeft);
this.top = parseInt(this.tmpNode.offsetTop);
//这里一定要return false啊，否则，嘿嘿，我不告诉你，你可以拖拖看。
return false;
}
this.DragStop = function(e)
{
if(!this.indrag)return;
this.indrag = false;
this.tmpNode.style.display = 'none';
e = e || window.event;
var target = e.target || e.srcElement;
if(target.className != 'title')return;
try{
target.parentNode.appendChild(this.DragObj);
}
catch(e)
{
//alert('出错啦!');
}
return true;
}
this.Draging = function(e)
{
if(!this.indrag)return;
e = e || window.event;
_this.autoScroll(e);
var x = e.pageX || (e.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));
var y = e.pageY || (e.clientY + (document.documentElement.scrollTop || document.body.scrollTop));
this.tmpNode.style.left = x+2+'px';
this.tmpNode.style.top = y+2+'px';
this.tmpNode.style.display = 'block';
//这里也要return false啊
return false;
}
this.fold = function(element)
{
if(element.innerHTML == '+')
{
element.parentNode.parentNode.style.height = '';
element.innerHTML = '-';
}
else
{
element.innerHTML = '+';
element.parentNode.parentNode.style.height = element.parentNode.offsetHeight;
}
return false;
}
this.autoScroll = function(e)
{
var step = 10;
//var ww = window.innerWidth || document.body.clientWidth;
var wh= window.innerHeight || document.body.clientHeight;
if(e.clientY<20)
{
window.scrollBy(0,-step);
}
else if(e.clientY > wh-20)
{
window.scrollBy(0,step);
}
}
return this;
}
var Tree = null;
function page_onload()
{
Tree = new TreeView('TreeRoot');
Tree.init();
Tree.addNode('TreeRoot','test_0','test_0','test_0');
for(i=1;i<100;i++)
{
Tree.addNode('test_'+Math.floor(Math.random()*i),'test_'+i,'test_'+i,'test_'+i);
}
}
window.onload = page_onload;
function debug(msg)
{
var d = new Date();
document.getElementById('debugger').innerHTML+= d.getHours()+':'+d.getMinutes()+':'+d.getSeconds()+'->'+msg+'<br />';
}
</script>
</head>
<body>
simple but useful.
<div id="dragDiv"></div>
<div id="TreeRoot" class="node">
<div id="TreeRoot_title" class="title"><span class="icon" onclick="Tree.fold(this)">-</span>Root</div>
<div id="TreeNode01" class="node">
<div id="TreeNode01_title" class="title"><span class="icon" onclick="Tree.fold(this)">-</span>Node01</div>
</div>
<div id="TreeNode02" class="node">
<div id="TreeNode02_title" class="title"><span class="icon" onclick="Tree.fold(this)">-</span>Node02</div>
<div id="TreeNode11" class="node">
<div id="TreeNode11_title" class="title"><span class="icon" onclick="Tree.fold(this)">-</span>Node11</div>
</div>
<div id="TreeNode12" class="node">
<div id="TreeNode12_title" class="title"><span class="icon" onclick="Tree.fold(this)">-</span>Node12</div>
</div>
</div>
</div>
<div id="debugger" style="position:absolute;top:0px;right:0px;border:1px solid black; overflow:auto;height:400px;200px;"></div>
</body>
</html>