JS仿iGoogle自定义首页模块拖拽特效的方法

摘要：本文实例讲述了JS仿iGoogle自定义首页模块拖拽特效的方法。分享给大家供大家参考。具体实现方法如下：复制代码代码如下:JS仿iGoogl...

本文实例讲述了JS仿iGoogle自定义首页模块拖拽特效的方法。分享给大家供大家参考。具体实现方法如下：

复制代码代码如下:

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

<head>

<title>JS仿iGoogle自定义首页模块拖拽效果</title>

var Common = {

getEvent: function() {//ie/ff

if (document.all) {

return window.event;

}

func = getEvent.caller;

while (func != null) {

var arg0 = func.arguments[0];

if (arg0) {

if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {

return arg0;

}

func = func.caller;

}

return null;

getMousePos: function(ev) {

if (!ev) {

ev = this.getEvent();

}

if (ev.pageX || ev.pageY) {

return {

x: ev.pageX,

y: ev.pageY

};

}

if (document.documentElement && document.documentElement.scrollTop) {

return {

x: ev.clientX + document.documentElement.scrollLeft - document.documentElement.clientLeft,

y: ev.clientY + document.documentElement.scrollTop - document.documentElement.clientTop

};

}

else if (document.body) {

return {

x: ev.clientX + document.body.scrollLeft - document.body.clientLeft,

y: ev.clientY + document.body.scrollTop - document.body.clientTop

};

}

getElementPos: function(el) {

el = this.getItself(el);

var _x = 0, _y = 0;

do {

_x += el.offsetLeft;

_y += el.offsetTop;

} while (el = el.offsetParent);

return { x: _x, y: _y };

getItself: function(id) {

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

getViewportSize: { w: (window.innerWidth) ? window.innerWidth : (document.documentElement && document.documentElement.clientWidth) ? document.documentElement.clientWidth : (document.body?document.body.offsetWidth:0), h: (window.innerHeight) ? window.innerHeight : (document.documentElement && document.documentElement.clientHeight) ? document.documentElement.clientHeight : (document.body ? document.body.offsetHeight : 0) },

isIE: document.all ? true : false,

setOuterHtml: function(obj, html) {

var Objrange = document.createRange();

obj.innerHTML = html;

Objrange.selectNodeContents(obj);

var frag = Objrange.extractContents();

obj.parentNode.insertBefore(frag, obj);

obj.parentNode.removeChild(obj);

firstChild: function(parentObj, tagName) {

if (Common.isIE) {

return parentObj.firstChild;

}

else {

var arr = parentObj.getElementsByTagName(tagName);

return arr[0];

}

lastChild: function(parentObj, tagName) {

if (Common.isIE) {

return parentObj.lastChild;

}

else {

var arr = parentObj.getElementsByTagName(tagName);

return arr[arr.length - 1];

}

setCookie: function(name, value) {

document.cookie = name + "=" + value;

getCookie: function(name) {

var strCookie = document.cookie;

var arrCookie = strCookie.split("; ");

for (var i = 0; i < arrCookie.length; i++) {

var arr = arrCookie[i].split("=");

if (!arr[1]) {

return "";

}

if (arr[0] == name) {

return arr[1];

}

return "";

delCookie: function(name) {

var exp = new Date();

exp.setTime(exp.getTime() - 1);

var cval = this.getCookie(name);

if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();

}

var Class = {

create: function() {

return function() { this.init.apply(this, arguments); }

}

var Drag = Class.create();

Drag.prototype = {

init: function(titleBar, dragDiv, Options) {

//设置点击是否透明，默认透明60%

titleBar = Common.getItself(titleBar);

dragDiv = Common.getItself(dragDiv);

this.dragArea = { maxLeft: -9999, maxRight: 9999, maxTop: -9999, maxBottom: 9999 };

if (Options) {

this.opacity = Options.opacity ? (isNaN(parseInt(Options.opacity)) ? 100 : parseInt(Options.opacity)) : 100;

if (Options.area) {

if (Options.area.left && !isNaN(parseInt(Options.area.left))) { this.dragArea.maxLeft = Options.area.left };

if (Options.area.right && !isNaN(parseInt(Options.area.right))) { this.dragArea.maxRight = Options.area.right };

if (Options.area.top && !isNaN(parseInt(Options.area.top))) { this.dragArea.maxTop = Options.area.top };

if (Options.area.bottom && !isNaN(parseInt(Options.area.bottom))) { this.dragArea.maxBottom = Options.area.bottom };

}

else {

this.opacity = 60;

}

this.originDragDiv = null;

this.tmpX = 0;

this.tmpY = 0;

this.moveable = false;

this.dragArray = [];

var dragObj = this;

var dragTbl = document.getElementById("dragTable");

titleBar.onmousedown = function(e) {

var ev = e || window.event || Common.getEvent();

//只允许通过鼠标左键进行拖拽,IE鼠标左键为1 FireFox为0

if (Common.isIE && ev.button == 1 || !Common.isIE && ev.button == 0) {

}

else {

return false;

}

//处理特殊情况：在最上/下面MOVE时不碰到现有DIV的情况下，又回到起始拖拽的列最上/下方

var tmpColId;

for (c = 0; c < dragTbl.rows[0].cells.length; c++) {

for (k = 0; k < dragTbl.rows[0].cells[c].getElementsByTagName("DIV").length; k++) {

if (dragDiv.id == dragTbl.rows[0].cells[c].getElementsByTagName("DIV")[k].id) {

tmpColId = c;

break;

}

var tmpPosFirstChild = Common.getElementPos(Common.firstChild(dragTbl.rows[0].cells[tmpColId], "DIV"));

var tmpPosLastChild = Common.getElementPos(Common.lastChild(dragTbl.rows[0].cells[tmpColId], "DIV"));

var tmpObj = { colId: tmpColId, firstChildUp: tmpPosFirstChild.y, lastChildDown: tmpPosLastChild.y + Common.lastChild(dragTbl.rows[0].cells[tmpColId], "DIV").offsetHeight };

//保存当前可拖拽各容器的所在位置

dragObj.dragArray = dragObj.RegDragsPos();

//插入虚线框

var dashedElement = document.createElement("div");

dashedElement.style.cssText = dragDiv.style.cssText;

dashedElement.style.border = " dashed 2px #aaa ";

dashedElement.style.marginBottom = "6px";

dashedElement.style.width = dragDiv.offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px"; //减去boderWidth使虚线框大小保持与dragDiv一致

dashedElement.style.height = dragDiv.offsetHeight - 2 * parseInt(dashedElement.style.borderWidth) + "px"; //加上px 保证FF正确

dashedElement.style.position = "relative";

if (dragDiv.nextSibling) {

dragDiv.parentNode.insertBefore(dashedElement, dragDiv.nextSibling);

}

else {

dragDiv.parentNode.appendChild(dashedElement);

}

//拖动时变为absolute

dragDiv.style.width = dragDiv.offsetWidth + "px";

dragDiv.style.position = "absolute";

dragObj.moveable = true;

dragDiv.style.zIndex = dragObj.GetZindex() + 1;

var downPos = Common.getMousePos(ev);

dragObj.tmpX = downPos.x - dragDiv.offsetLeft;

dragObj.tmpY = downPos.y - dragDiv.offsetTop;

if (Common.isIE) {

dragDiv.setCapture();

} else {

window.captureEvents(Event.mousemove);

}

dragObj.SetOpacity(dragDiv, dragObj.opacity);

//FireFox 去除容器内拖拽图片问题

if (ev.preventDefault) {

ev.preventDefault();

ev.stopPropagation();

}

document.onmousemove = function(e) {

if (dragObj.moveable) {

var ev = e || window.event || Common.getEvent();

//IE 去除容器内拖拽图片问题

if (document.all) //IE

{

ev.returnValue = false;

}

var movePos = Common.getMousePos(ev);

dragDiv.style.left = Math.max(Math.min(movePos.x - dragObj.tmpX, dragObj.dragArea.maxRight), dragObj.dragArea.maxLeft) + "px";

dragDiv.style.top = Math.max(Math.min(movePos.y - dragObj.tmpY, dragObj.dragArea.maxBottom), dragObj.dragArea.maxTop) + "px";

var targetDiv = null;

for (var k = 0; k < dragObj.dragArray.length; k++) {

if (dragDiv == dragObj.dragArray[i]) {

continue;

}

if (movePos.x > dragObj.dragArray[k].PosLeft && movePos.x < dragObj.dragArray[k].PosLeft + dragObj.dragArray[k].PosWidth

&& movePos.y > dragObj.dragArray[k].PosTop && movePos.y < dragObj.dragArray[k].PosTop + dragObj.dragArray[k].PosHeight

) {

targetDiv = document.getElementById(dragObj.dragArray[k].DragId);

if (movePos.y < dragObj.dragArray[k].PosTop + dragObj.dragArray[k].PosHeight / 2) {

//往上移

dashedElement.style.width = targetDiv.offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";

targetDiv.parentNode.insertBefore(dashedElement, targetDiv);

}

else {

//往下移

dashedElement.style.width = targetDiv.offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";

if (targetDiv.nextSibling) {

targetDiv.parentNode.insertBefore(dashedElement, targetDiv.nextSibling);

}

else {

targetDiv.parentNode.appendChild(dashedElement);

}

for (j = 0; j < dragTbl.rows[0].cells.length; j++) {

var startLeft = Common.getElementPos(dragTbl.rows[0].cells[j]).x;

if (movePos.x > startLeft && movePos.x < startLeft + dragTbl.rows[0].cells[j].offsetWidth) {

///列无DIV

if (dragTbl.rows[0].cells[j].getElementsByTagName("div").length == 0) {

dashedElement.style.width = dragTbl.rows[0].cells[j].offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";

dragTbl.rows[0].cells[j].appendChild(dashedElement);

}

else {

var posFirstChild = Common.getElementPos(Common.firstChild(dragTbl.rows[0].cells[j], "DIV"));

var posLastChild = Common.getElementPos(Common.lastChild(dragTbl.rows[0].cells[j], "DIV"));

//处理特殊情况：在最上/下面MOVE时不碰到现有DIV的情况下，又回到起始拖拽的列最上/下方

var tmpUp, tmpDown;

if (tmpObj.colId == j) {

tmpUp = tmpObj.firstChildUp;

tmpDown = tmpObj.lastChildDown;

}

else {

tmpUp = posFirstChild.y;

tmpDown = posLastChild.y + Common.lastChild(dragTbl.rows[0].cells[j], "DIV").offsetHeight;

}

if (movePos.y < tmpUp) {///从最上面插入虚线框

dashedElement.style.width = Common.firstChild(dragTbl.rows[0].cells[j], "DIV").offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";

dragTbl.rows[0].cells[j].insertBefore(dashedElement, Common.firstChild(dragTbl.rows[0].cells[j], "DIV"));

}

else if (movePos.y > tmpDown) {///从最下面插入虚线框

dashedElement.style.width = Common.lastChild(dragTbl.rows[0].cells[j], "DIV").offsetWidth - 2 * parseInt(dashedElement.style.borderWidth) + "px";

dragTbl.rows[0].cells[j].appendChild(dashedElement);

}

};

document.onmouseup = function() {

if (dragObj.moveable) {

if (Common.isIE) {

dragDiv.releaseCapture();

}

else {

window.releaseEvents(dragDiv.mousemove);

}

dragObj.SetOpacity(dragDiv, 100);

dragObj.moveable = false;

dragObj.tmpX = 0;

dragObj.tmpY = 0;

//务必写在此IF内

dragDiv.style.left = "";

dragDiv.style.top = "";

dragDiv.style.width = "";

dragDiv.style.position = "";

dashedElement.parentNode.insertBefore(dragDiv, dashedElement);

dashedElement.parentNode.removeChild(dashedElement);

}

};

}

SetOpacity: function(dragDiv, n) {

if (Common.isIE) {

dragDiv.filters.alpha.opacity = n;

}

else {

dragDiv.style.opacity = n / 100;

}

GetZindex: function() {

var maxZindex = 0;

var divs = document.getElementsByTagName("div");

for (z = 0; z < divs.length; z++) {

maxZindex = Math.max(maxZindex, divs[z].style.zIndex);

}

return maxZindex;

RegDragsPos: function() {

var arrDragDivs = new Array();

var dragTbl = document.getElementById("dragTable");

var tmpDiv, tmpPos;

for (i = 0; i < dragTbl.getElementsByTagName("div").length; i++) {

tmpDiv = dragTbl.getElementsByTagName("div")[i];

if (tmpDiv.className == "dragDiv") {

tmpPos = Common.getElementPos(tmpDiv);

arrDragDivs.push({ DragId: tmpDiv.id, PosLeft: tmpPos.x, PosTop: tmpPos.y, PosWidth: tmpDiv.offsetWidth, PosHeight: tmpDiv.offsetHeight });

}

return arrDragDivs;

}

window.onload = function() {

var dragTbl = document.getElementById("dragTable");

if (Common.getCookie("configArr")) {

var configArr = eval("(" + Common.getCookie("configArr") + ")");

for (i = 0; i < dragTbl.rows[0].cells.length; i++) {

for (j = 0; j < configArr[i].length; j++) {

dragTbl.rows[0].cells[i].appendChild(document.getElementById(configArr[i][j]));

}

new Drag("titleBar1", "dragDiv1");

new Drag("titleBar2", "dragDiv2");

new Drag("titleBar3", "dragDiv3");

new Drag("titleBar4", "dragDiv4");

new Drag("titleBar5", "dragDiv5");

}

window.onunload = function() {

var dragTbl = document.getElementById("dragTable");

var configArr = "";

for (i = 0; i < dragTbl.rows[0].cells.length; i++) {

var tmpStr = "";

for (j = 0; j < dragTbl.rows[0].cells[i].getElementsByTagName("DIV").length; j++) {

tmpStr += (tmpStr == "" " + dragTbl.rows[0].cells[i].getElementsByTagName("DIV")[j].id + "'";

}

configArr += (configArr == "" " + tmpStr + "]";

}

//format like: [['dragDiv3','dragDiv5'],['dragDiv4','dragDiv1'],['dragDiv2']]

Common.setCookie("configArr", "[" + configArr + "]");

}

</script>

.spanDiv{

position:relative;

width:5px;

height:5px;

}

.dragDiv,.nodragDiv{

position:relative;

filter:alpha(opacity=100);

opacity:1;

margin-bottom:6px;

background-color:#FFFFFF;

}

</style>

</head>

<body >

</script>

<tr>

<th align="left" unselectable="on" >Title1</th>

</tr>

<td unselectable="on">这里的字比较长....我来了....中国....中国...外国.，看一下有没有溢出></td>

</tr>

</table>

</div>

<th align="left" unselectable="on" >Title2</th>

</tr>

<td unselectable="on">Content2...</td>

</tr>

</table>

</div>

</td>

<th align="left" unselectable="on" >Title3</th>

</tr>

<td unselectable="on">Content3...</td>

</tr>

</table>

</div>

</td>

<th align="left" unselectable="on" >Title4</th>

</tr>

<td unselectable="on">Content4...</td>

</tr>

</table>

</div>

<th align="left" unselectable="on" >Title5</th>

</tr>

<td unselectable="on">Content5...</td>

</tr>

</table>

</div>

</td>

</tr>

</table>

</body>

</html>

<br><br><hr> 收集于互联网，只为兴趣与学习交流，不作商业用途。</font></p>

希望本文所述对大家的javascript程序设计有所帮助。