很强大的 js拖曳效果

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
var Class = {
//创建类
create: function () {
return function () {
this.initialize.apply(this, arguments);
};
}
};

var $A = function (a) {
//转换数组
return a ? Array.apply(null, a) : new Array;
};

var $ = function (id) {
//获取对象
return document.getElementById(id);
};

Object.extend = function (a, b) {
//追加方法
for (var i in b) a[i] = b[i];
return a;
};

Object.extend(Object, {

addEvent: function (a, b, c, d) {
//添加函数
if (a.attachEvent) a.attachEvent(b[0], c);
else a.addEventListener(b[1] || b[0].replace(/^on/, ""), c, d || false);
return c;
},

delEvent: function (a, b, c, d) {
if (a.detachEvent) a.detachEvent(b[0], c);
else a.removeEventListener(b[1] || b[0].replace(/^on/, ""), c, d || false);
return c;
},

reEvent: function () {
//获取Event
return window.event ? window.event : (function (o) {
do {
o = o.caller;
} while (o && !/^\[object[ A-Za-z]*Event\]$/.test(o.arguments[0]));
return o.arguments[0];
})(this.reEvent);
}

});

Function.prototype.bind = function () {
//绑定事件
var wc = this, a = $A(arguments), o = a.shift();
return function () {
wc.apply(o, a.concat($A(arguments)));
};
};

var Table = Class.create();

Table.prototype = {

initialize: function () {
//初始化
var wc = this;
wc.cols = new Array; //创建列
},

addCols: function (o) {
//添加列
var wc = this, cols = wc.cols, i = cols.length;
return cols[i] = {
id: i, div: o, rows: new Array, //创建行
addRow: wc.addRow, chRow: wc.chRow, inRow: wc.inRow, delRow: wc.delRow
};
},

addRow: function (o) {
//添加行
var wc = this, rows = wc.rows, i = rows.length;
return rows[i] = {
id: i, div: o, cols: wc
};
},

inRow: function (a, b) {
//插入行
var wc = b.cols = this, rows = wc.rows, i;
if (a < rows.length) {
for (i = a; i < rows.length; i++) rows[i].id++;
rows.splice(a, 0, b);
b.id = a;
return b;
} else {
b.id = rows.length;
return rows[b.id] = b;
}
},

delRow: function (a) {
//删除列
var wc = this, rows = wc.rows, i, r;
if (a >= rows.length) return;
r = rows[a];
rows.splice(a, 1);
for (i = a; i < rows.length; i++) rows[i].id = i;
return r;
}
};
var CDrag = Class.create();

CDrag.IE = /MSIE/.test(window.navigator.userAgent);

CDrag.prototype = {

initialize: function () {
//初始化成员
var wc = this;
wc.table = new Table; //建立表格对象
wc.iFunc = wc.eFunc = null;
wc.obj = { on: { a: null, b: "" }, row: null, left: 0, top: 0 };
wc.temp = { row: null, div: document.createElement("div") };
wc.temp.div.setAttribute(CDrag.IE ? "className" : "class", "CDrag_temp_div");
wc.temp.div.innerHTML = " ";
},

reMouse: function (a) {
//获取鼠标位置
var e = Object.reEvent();
return {
x: document.documentElement.scrollLeft + e.clientX,
y: document.documentElement.scrollTop + e.clientY
};
},

rePosition: function (o) {
//获取元素绝对位置
var $x = $y = 0;
do {
$x += o.offsetLeft;
$y += o.offsetTop;
} while ((o = o.offsetParent) && o.tagName != "BODY");
return { x: $x, y: $y };
},

sMove: function (o) {
//当拖动开始时设置参数

var wc = this;
if (wc.iFunc || wc.eFinc) return;

var mouse = wc.reMouse(), obj = wc.obj, temp = wc.temp, div = o.div, position = wc.rePosition(div);

obj.row = o;
obj.on.b = "me";
obj.left = mouse.x - position.x;
obj.top = mouse.y - position.y;

temp.row = document.body.appendChild(div.cloneNode(true)); //复制预拖拽对象

with (temp.row.style) {
//设置复制对象
position = "absolute";
left = mouse.x - obj.left + "px";
top = mouse.y - obj.top + "px";
zIndex = 100;
opacity = "0.3";
filter = "alpha(opacity:30)";
}

with (temp.div.style) {
//设置站位对象
height = div.clientHeight + "px";
width = div.clientWidth + "px";
}

/*div.parentNode.insertBefore(temp.div, div);
div.style.display = "none"; //隐藏预拖拽对象*/
div.parentNode.replaceChild(temp.div, div);

wc.iFunc = Object.addEvent(document, ["onmousemove"], wc.iMove.bind(wc));
wc.eFunc = Object.addEvent(document, ["onmouseup"], wc.eMove.bind(wc));
document.onselectstart = new Function("return false");
},

iMove: function () {
//当鼠标移动时设置参数
var wc = this, cols = wc.table.cols, mouse = wc.reMouse(), obj = wc.obj, temp = wc.temp, row = obj.row, div = temp.row,
t_position, t_cols, t_rows, i, j;

with (div.style) {
left = mouse.x - obj.left + "px";
top = mouse.y - obj.top + "px";
}

for (i = 0; i < cols.length; i++) {
t_cols = cols[i];
t_position = wc.rePosition(t_cols.div);
if (t_position.x < mouse.x && t_position.x + t_cols.div.offsetWidth > mouse.x) {
if (t_cols.rows.length > 0) { //如果此列行数大于0
if (wc.rePosition(t_cols.rows[0].div).y + 20 > mouse.y) {
//如果鼠标位置大于第一行的位置即是最上。。
//向上
obj.on.a = t_cols.rows[0];
obj.on.b = "up";
obj.on.a.div.parentNode.insertBefore(temp.div, obj.on.a.div);
} else if (t_cols.rows.length > 1 && t_cols.rows[0] == row &&
wc.rePosition(t_cols.rows[1].div).y + 20 > mouse.y) {
//如果第一行是拖拽对象而第鼠标大于第二行位置则，没有动。。
//向上
obj.on.b = "me";
t_cols.rows[1].div.parentNode.insertBefore(temp.div, t_cols.rows[1].div);
} else {
for (j = t_cols.rows.length - 1; j > -1; j--) {
//重最下行向上查询
t_rows = t_cols.rows[j];
if (t_rows == obj.row) continue;
if (wc.rePosition(t_rows.div).y < mouse.y) {
//如果鼠标大于这行则在这行下面
if (t_rows.id + 1 < t_cols.rows.length && t_cols.rows[t_rows.id + 1] != obj.row) {
//如果这行有下一行则重这行下一行的上面插入
t_cols.rows[t_rows.id + 1].div.parentNode.
insertBefore(temp.div, t_cols.rows[t_rows.id + 1].div);
obj.on.a = t_rows;
obj.on.b = "down";
} else if (t_rows.id + 2 < t_cols.rows.length) {
//如果这行下一行是拖拽对象则插入到下两行，即拖拽对象返回原位
t_cols.rows[t_rows.id + 2].div.parentNode.
insertBefore(temp.div, t_cols.rows[t_rows.id + 2].div);
obj.on.b = "me";
} else {
//前面都没有满足则放在最低行
t_rows.div.parentNode.appendChild(temp.div);
obj.on.a = t_rows;
obj.on.b = "down";
}
return;
}
}
}
} else {
//此列无内容添加新行
t_cols.div.appendChild(temp.div);
obj.on.a = t_cols;
obj.on.b = "new";
}
}
}
},

eMove: function () {
//当鼠标释放时设置参数
var wc = this, obj = wc.obj, temp = wc.temp, row = obj.row, div = row.div, o_cols, n_cols;

if (obj.on.b == "up") {
//向最上添加
o_cols = obj.row.cols;
n_cols = obj.on.a.cols;
n_cols.inRow(0, o_cols.delRow(obj.row.id));
} else if (obj.on.b == "down") {
//相对向下添加
o_cols = obj.row.cols;
n_cols = obj.on.a.cols;
n_cols.inRow(obj.on.a.id + 1, o_cols.delRow(obj.row.id));
} else if (obj.on.b == "new") {
//向无内容列添加
o_cols = obj.row.cols;
n_cols = obj.on.a;
n_cols.inRow(0, o_cols.delRow(obj.row.id));
}

temp.div.parentNode.replaceChild(div, temp.div);
temp.row.parentNode.removeChild(temp.row);
delete temp.row;

Object.delEvent(document, ["onmousemove"], wc.iFunc);
Object.delEvent(document, ["onmouseup"], wc.eFunc);
document.onselectstart = wc.iFunc = wc.eFunc = null;
},

add: function (o) {
//添加对象
var wc = this;
Object.addEvent(o.div.childNodes[CDrag.IE ? 0 : 1], ["onmousedown"], wc.sMove.bind(wc, o));
},

parse: function (o) {
//初始化成员
var wc = this, table = wc.table, cols, i, j;
for (i = 0; i < o.length; i++) {
cols = table.addCols(o[i].cols);
for (j = 0; j < o[i].rows.length; j++)
wc.add(cols.addRow(o[i].rows[j]));
}
}

};

Object.addEvent(window, ["onload"], function () {
var wc = new CDrag;
wc.parse([

{
cols: $("m_1"), rows: [$("m_1_1"), $("m_1_2"), $("m_1_3"), $("m_1_4")]
},

{
cols: $("m_2"), rows: [$("m_2_1"), $("m_2_2"), $("m_2_3"), $("m_2_4")]
},

{
cols: $("m_3"), rows: [$("m_3_1"), $("m_3_2"), $("m_3_3"), $("m_3_4")]
},

{
cols: $("m_4"), rows: [$("m_4_1"), $("m_4_2"), $("m_4_3"), $("m_4_4")]
}

]);
});

</script>
<style type="text/css">

body {
100%;
max-height:100%;
padding:0px;
margin:0px;
text-align:center;
}

.cell {
float:left;
clear:right;
}

.row {
clear:both;
}

.r_nbsp {
20px;
}

.root {
868px;
margin: 0 auto;
}

.root * {
/*次属性FF的说*/
-moz-user-select:none;
}

.line {
202px;
line-height:20px;
height:20px;
overflow:hidden;
font-size:12px;
}

.move {
border:#CCCCCC 1px solid;
200px;
height:aotu;
}

.title {
height:24px;
cursor:move;
background:#0080C0;
font-size:12px;
font-weight:bold;
color:#FFFFFF;
line-height:24px;
text-align:center;
}

.content {
border-top:#CCCCCC 1px solid;
height:100px;
background-color:#F7F7F7;
}

.CDrag_temp_div {
border:#CCCCCC 1px dashed;
}

</style>

</head>

</head>
<body><br />
<div class="root">
<div class="cell" id="m_1">
<div class="line">
第一列</div>
<div class="move" id="m_1_1">
<div class="title">
第一列的第一个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_1_2">
<div class="title">
第一列的第二个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_1_3">
<div class="title">
第一列的第三个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_1_4">
<div class="title">
第一列的第四个的说</div>
<div class="content">
</div>
</div>
</div>
<div class="cell r_nbsp">
</div>
<div class="cell" id="m_2">
<div class="line">
第二列</div>
<div class="move" id="m_2_1">
<div class="title">
第二列的第一个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_2_2">
<div class="title">
第二列的第二个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_2_3">
<div class="title">
第二列的第三个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_2_4">
<div class="title">
第二列的第四个的说</div>
<div class="content">
</div>
</div>
</div>
<div class="cell r_nbsp">
</div>
<div class="cell" id="m_3">
<div class="line">
第三列</div>
<div class="move" id="m_3_1">
<div class="title">
第三列的第一个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_3_2">
<div class="title">
第三列的第二个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_3_3">
<div class="title">
第三列的第三个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_3_4">
<div class="title">
第三列的第四个的说</div>
<div class="content">
</div>
</div>
</div>
<div class="cell r_nbsp">
</div>
<div class="cell" id="m_4">
<div class="line">
第四列</div>
<div class="move" id="m_4_1">
<div class="title">
第四列的第一个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_4_2">
<div class="title">
第四列的第二个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_4_3">
<div class="title">
第四列的第三个的说</div>
<div class="content">
</div>
</div>
<div class="move" id="m_4_4">
<div class="title">
第四列的第四个的说</div>
<div class="content">
</div>
</div>
</div>
</div>
</body></html>