JS实现多Div模块拖拽功能

空闲时间，同事让帮忙整个JS拖拽div模块功能。于是便在网上搜索，总结如下一个可实现多div模块拖拽的功能。一下是整体的HTML代码，
里边可以控制到拖拽开始（onStart），拖拽时候（onMove），拖拽结束（onStop）三个时候的准确状态值及坐标
<!DOCTYPE>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>拖拽库</title>

<style type="text/css">

	div,h2,p{margin:0;padding:0;}

	body{font:14px/1.5 arial;}

	#box{width:100px;height:100px;background:#fef4eb;padding:5px;margin:50px;border:1px solid #f60;}

	#box .title{height:25px;background:#f60;}

	#box2{width:100px;height:100px;background:#fef4eb;padding:5px;margin:100px;border:1px solid #f60;}

	#box2 .title{height:25px;background:#f60;}

	#tool{margin-bottom:10px;}

</style>

<script type="text/javascript">

function Drag()

{

	 //初始化

	 this.initialize.apply(this, arguments)

}

Drag.prototype = {

 //初始化

 initialize : function (drag, options)

 {

	 this.drag = this.$(drag);

	 this._x = this._y = 0;

	 this._moveDrag = this.bind(this, this.moveDrag);

	 this._stopDrag = this.bind(this, this.stopDrag);

	 this.setOptions(options);

	 this.handle = this.$(this.options.handle);

	 this.maxContainer = this.$(this.options.maxContainer);

	 this.maxTop = Math.max(this.maxContainer.clientHeight, this.maxContainer.scrollHeight) - this.drag.offsetHeight;

	 this.maxLeft = Math.max(this.maxContainer.clientWidth, this.maxContainer.scrollWidth) - this.drag.offsetWidth;

	 this.limit = this.options.limit;

	 this.lockX = this.options.lockX;

	 this.lockY = this.options.lockY;

	 this.lock = this.options.lock;

	 this.onStart = this.options.onStart;

	 this.onMove = this.options.onMove;

	 this.onStop = this.options.onStop;

	 this.handle.style.cursor = "move";

	 this.changeLayout();

	 this.addHandler(this.handle, "mousedown", this.bind(this, this.startDrag))

 },

 changeLayout : function ()

 {

	 this.drag.style.top = this.drag.offsetTop + "px";

	 this.drag.style.left = this.drag.offsetLeft + "px";

	 this.drag.style.position = "absolute";

	 this.drag.style.margin = "0"

 },

	startDrag : function (event)

 {

	 var event = event || window.event;

	 this._x = event.clientX - this.drag.offsetLeft;

	 this._y = event.clientY - this.drag.offsetTop;

	 this.addHandler(document, "mousemove", this._moveDrag);

	 this.addHandler(document, "mouseup", this._stopDrag);

	 event.preventDefault && event.preventDefault();

	 this.handle.setCapture && this.handle.setCapture();

	 this.onStart()

 },

 moveDrag : function (event)

 {

	 var event = event || window.event;

	 var iTop = event.clientY - this._y;

	 var iLeft = event.clientX - this._x;

	 if (this.lock) return;

	 this.limit && (iTop < 0 && (iTop = 0), iLeft < 0 && (iLeft = 0), iTop > this.maxTop && (iTop = this.maxTop), iLeft > this.maxLeft && (iLeft = this.maxLeft));

	 this.lockY || (this.drag.style.top = iTop + "px");

	 this.lockX || (this.drag.style.left = iLeft + "px");

	 event.preventDefault && event.preventDefault();

	 this.onMove()

 },

 stopDrag : function ()

 {

	 this.removeHandler(document, "mousemove", this._moveDrag);

	 this.removeHandler(document, "mouseup", this._stopDrag);

	 this.handle.releaseCapture && this.handle.releaseCapture();

	 this.onStop()

 },

 //参数设置

 setOptions : function (options){

	this.options = {

	  handle:  this.drag, //事件对象

	  limit:  true, //锁定范围

	  lock:  false, //锁定位置

	  lockX:  false, //锁定水平位置

	  lockY:  false, //锁定垂直位置

	  maxContainer: document.documentElement || document.body, //指定限制容器

	  onStart: function () {}, //开始时回调函数

	  onMove:  function () {}, //拖拽时回调函数

	  onStop:  function () {} //停止时回调函数

	};

	for (var p in options) this.options[p] = options[p]

 },

 //获取id

 $ : function (id){

		return typeof id === "string" ? document.getElementById(id) : id

  },

 //添加绑定事件

 addHandler : function (oElement, sEventType, fnHandler) {

	 return oElement.addEventListener ? oElement.addEventListener(sEventType, fnHandler, false) : oElement.attachEvent("on" + sEventType, fnHandler)

 },

 //删除绑定事件

 removeHandler : function (oElement, sEventType, fnHandler) {

	return oElement.removeEventListener ? oElement.removeEventListener(sEventType, fnHandler, false) : oElement.detachEvent("on" + sEventType, fnHandler)

 },

 //绑定事件到对象

 bind : function (object, fnHandler) {

	return function () {

		return fnHandler.apply(object, arguments)

		}

	}

};

//应用

window.onload = function (){

	 var oBox = document.getElementById("box");

	 var oTitle = oBox.getElementsByTagName("h2")[0];

	 var oSpan = document.getElementsByTagName("span")[0];

	 var oDrag = new Drag(oBox, {handle:oTitle, limit:false});

	 var oBox2 = document.getElementById("box2");

	 var oTitle2 = oBox2.getElementsByTagName("h2")[0];

	 var oSpan2 = document.getElementsByTagName("span")[0];

	 var oDrag2 = new Drag(oBox2, {handle:oTitle2, limit:false});

	 var aInput = document.getElementsByTagName("input");

	 //锁定范围接口

	 aInput[0].onclick = function (){

		 oDrag.limit = !oDrag.limit;

		 this.value = oDrag.limit ? "取消锁定范围" : "锁定范围"

	 };

	 //水平锁定接口

	 aInput[1].onclick = function () {

		 oDrag.lockX = !oDrag.lockX;

		 this.value = oDrag.lockX ? "取消水平锁定" : "水平锁定"

	 };

	 //垂直锁定接口

	 aInput[2].onclick = function (){

		 oDrag.lockY = !oDrag.lockY;

		 this.value = oDrag.lockY ? "取消垂直锁定" : "垂直锁定"

	 };

	 //锁定位置接口

	 aInput[3].onclick = function () {

		 oDrag.lock = !oDrag.lock;

		 this.value = oDrag.lock ? "取消锁定位置" : "锁定位置"

	 };

	 //开始拖拽时方法

	 oDrag.onStart = function ()  {

		oSpan.innerHTML = "开始拖拽"

	 };

	 //开始拖拽时方法

	 oDrag.onMove = function () {

		oSpan.innerHTML = "left:" + this.drag.offsetLeft + ", top:" + this.drag.offsetTop

	 };

	 //结束拖拽时方法

	 oDrag.onStop = function () {

		oSpan.innerHTML = "结束拖拽了"

	 };

};

</script>

</head>

<body>

	<div id="tool">

		  <input type="button" value="锁定范围" />

		  <input type="button" value="水平锁定" />

		  <input type="button" value="垂直锁定" />

		  <input type="button" value="锁定位置" />

	</div>

	<p>拖放状态：<span>未开始</span></p>

	<div id="box">

		<h2 class="title">我是第一个模块</h2>

	</div>

	<div id="box2">

	 <h2 class="title">我是第二个模块</h2>

	</div>

</body>

</html>
　　以后还会更新...
巴特西

JS实现多Div模块拖拽功能

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