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漂亮的Js拖动层，窗口拖拽（改变大小/最小化/最大化/还原/关闭）

2015-03-08 14:48 816 查看

<!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>

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

<title>窗口拖拽（改变大小/最小化/最大化/还原/关闭）</title>

<style type="text/css">

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

body{background:url(/jscss/demoimg/201205/bg.jpg);font:12px/1.5 \5fae\8f6f\96c5\9ed1;color:#333;}

#drag{position:absolute;top:100px;left:100px;width:300px;height:160px;background:#e9e9e9;border:1px solid #444;border-radius:5px;box-shadow:0 1px 3px 2px #666;}

#drag .title{position:relative;height:27px;margin:5px;}

#drag .title h2{font-size:14px;height:27px;line-height:24px;border-bottom:1px solid #A1B4B0;}

#drag .title div{position:absolute;height:19px;top:2px;right:0;}

#drag .title a,a.open{float:left;width:21px;height:19px;display:block;margin-left:5px;background:url(/jscss/demoimg/201205/tool.png) no-repeat;}

a.open{position:absolute;top:10px;left:50%;margin-left:-10px;background-position:0 0;}

a.open:hover{background-position:0 -29px;}

#drag .title a.min{background-position:-29px 0;}

#drag .title a.min:hover{background-position:-29px -29px;}

#drag .title a.max{background-position:-60px 0;}

#drag .title a.max:hover{background-position:-60px -29px;}

#drag .title a.revert{background-position:-149px 0;display:none;}

#drag .title a.revert:hover{background-position:-149px -29px;}

#drag .title a.close{background-position:-89px 0;}

#drag .title a.close:hover{background-position:-89px -29px;}

#drag .content{overflow:auto;margin:0 5px;}

#drag .resizeBR{position:absolute;width:14px;height:14px;right:0;bottom:0;overflow:hidden;cursor:nw-resize;background:url(/jscss/demoimg/201205/resize.png) no-repeat;}

#drag .resizeL,#drag .resizeT,#drag .resizeR,#drag .resizeB,#drag .resizeLT,#drag .resizeTR,#drag .resizeLB{position:absolute;background:#000;overflow:hidden;opacity:0;filter:alpha

(opacity=0);}

#drag .resizeL,#drag .resizeR{top:0;width:5px;height:100%;cursor:w-resize;}

#drag .resizeR{right:0;}

#drag .resizeT,#drag .resizeB{width:100%;height:5px;cursor:n-resize;}

#drag .resizeT{top:0;}

#drag .resizeB{bottom:0;}

#drag .resizeLT,#drag .resizeTR,#drag .resizeLB{width:8px;height:8px;background:#FF0;}

#drag .resizeLT{top:0;left:0;cursor:nw-resize;}

#drag .resizeTR{top:0;right:0;cursor:ne-resize;}

#drag .resizeLB{left:0;bottom:0;cursor:ne-resize;}

</style>

<script type="text/javascript">

/*-------------------------- +

获取id, class, tagName

+-------------------------- */

var get = {

byId: function(id) {

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

},

byClass: function(sClass, oParent) {

var aClass = [];

var reClass = new RegExp("(^| )" + sClass + "( |$)");

var aElem = this.byTagName("*", oParent);

for (var i = 0; i < aElem.length; i++) reClass.test(aElem[i].className) && aClass.push(aElem[i]);

return aClass

},

byTagName: function(elem, obj) {

return (obj || document).getElementsByTagName(elem)

}

};

var dragMinWidth = 250;

var dragMinHeight = 124;

/*-------------------------- +

拖拽函数

+-------------------------- */

function drag(oDrag, handle)

{

var disX = dixY = 0;

var oMin = get.byClass("min", oDrag)[0];

var oMax = get.byClass("max", oDrag)[0];

var oRevert = get.byClass("revert", oDrag)[0];

var oClose = get.byClass("close", oDrag)[0];

handle = handle || oDrag;

handle.style.cursor = "move";

handle.onmousedown = function (event)

{

var event = event || window.event;

disX = event.clientX - oDrag.offsetLeft;

disY = event.clientY - oDrag.offsetTop;

document.onmousemove = function (event)

{

var event = event || window.event;

var iL = event.clientX - disX;

var iT = event.clientY - disY;

var maxL = document.documentElement.clientWidth - oDrag.offsetWidth;

var maxT = document.documentElement.clientHeight - oDrag.offsetHeight;

iL <= 0 && (iL = 0);

iT <= 0 && (iT = 0);

iL >= maxL && (iL = maxL);

iT >= maxT && (iT = maxT);

oDrag.style.left = iL + "px";

oDrag.style.top = iT + "px";

return false

};

document.onmouseup = function ()

{

document.onmousemove = null;

document.onmouseup = null;

this.releaseCapture && this.releaseCapture()

};

this.setCapture && this.setCapture();

return false

};

//最大化按钮

oMax.onclick = function ()

{

oDrag.style.top = oDrag.style.left = 0;

oDrag.style.width = document.documentElement.clientWidth - 2 + "px";

oDrag.style.height = document.documentElement.clientHeight - 2 + "px";

this.style.display = "none";

oRevert.style.display = "block";

};

//还原按钮

oRevert.onclick = function ()

{

oDrag.style.width = dragMinWidth + "px";

oDrag.style.height = dragMinHeight + "px";

oDrag.style.left = (document.documentElement.clientWidth - oDrag.offsetWidth) / 2 + "px";

oDrag.style.top = (document.documentElement.clientHeight - oDrag.offsetHeight) / 2 + "px";

this.style.display = "none";

oMax.style.display = "block";

};

//最小化按钮

oMin.onclick = oClose.onclick = function ()

{

oDrag.style.display = "none";

var oA = document.createElement("a");

oA.className = "open";

oA.href = "javascript:;";

oA.title = "还原";

document.body.appendChild(oA);

oA.onclick = function ()

{

oDrag.style.display = "block";

document.body.removeChild(this);

this.onclick = null;

};

};

//阻止冒泡

oMin.onmousedown = oMax.onmousedown = oClose.onmousedown = function (event)

{

this.onfocus = function () {this.blur()};

(event || window.event).cancelBubble = true

};

}

/*-------------------------- +

改变大小函数

+-------------------------- */

function resize(oParent, handle, isLeft, isTop, lockX, lockY)

{

handle.onmousedown = function (event)

{

var event = event || window.event;

var disX = event.clientX - handle.offsetLeft;

var disY = event.clientY - handle.offsetTop;

var iParentTop = oParent.offsetTop;

var iParentLeft = oParent.offsetLeft;

var iParentWidth = oParent.offsetWidth;

var iParentHeight = oParent.offsetHeight;

document.onmousemove = function (event)

{

var event = event || window.event;

var iL = event.clientX - disX;

var iT = event.clientY - disY;

var maxW = document.documentElement.clientWidth - oParent.offsetLeft - 2;

var maxH = document.documentElement.clientHeight - oParent.offsetTop - 2;
var iW = isLeft ? iParentWidth - iL :

handle.offsetWidth + iL;

var iH = isTop ? iParentHeight - iT : handle.offsetHeight + iT;

isLeft && (oParent.style.left = iParentLeft + iL + "px");

isTop && (oParent.style.top = iParentTop + iT + "px");

iW < dragMinWidth && (iW = dragMinWidth);

iW > maxW && (iW = maxW);

lockX || (oParent.style.width = iW + "px");

iH < dragMinHeight && (iH = dragMinHeight);

iH > maxH && (iH = maxH);

lockY || (oParent.style.height = iH + "px");

if((isLeft && iW == dragMinWidth) || (isTop && iH == dragMinHeight)) document.onmousemove = null;

return false;

};

document.onmouseup = function ()

{

document.onmousemove = null;

document.onmouseup = null;

};

return false;

}

};

window.onload = window.onresize = function ()

{

var oDrag = document.getElementById("drag");

var oTitle = get.byClass("title", oDrag)[0];

var oL = get.byClass("resizeL", oDrag)[0];

var oT = get.byClass("resizeT", oDrag)[0];

var oR = get.byClass("resizeR", oDrag)[0];

var oB = get.byClass("resizeB", oDrag)[0];

var oLT = get.byClass("resizeLT", oDrag)[0];

var oTR = get.byClass("resizeTR", oDrag)[0];

var oBR = get.byClass("resizeBR", oDrag)[0];

var oLB = get.byClass("resizeLB", oDrag)[0];

drag(oDrag, oTitle);

//四角

resize(oDrag, oLT, true, true, false, false);

resize(oDrag, oTR, false, true, false, false);

resize(oDrag, oBR, false, false, false, false);

resize(oDrag, oLB, true, false, false, false);

//四边

resize(oDrag, oL, true, false, false, true);

resize(oDrag, oT, false, true, true, false);

resize(oDrag, oR, false, false, false, true);

resize(oDrag, oB, false, false, true, false);

oDrag.style.left = (document.documentElement.clientWidth - oDrag.offsetWidth) / 2 + "px";

oDrag.style.top = (document.documentElement.clientHeight - oDrag.offsetHeight) / 2 + "px";

}

</script>

</head>

<body>

<div id="drag">

<div class="title">

<h2>这是一个可以拖动的窗口</h2>

<div>

<a class="min" href="javascript:;" title="最小化"></a>

<a class="max" href="javascript:;" title="最大化"></a>

<a class="revert" href="javascript:;" title="还原"></a>

<a class="close" href="javascript:;" title="关闭"></a>

</div>

</div>

<div class="resizeL"></div>

<div class="resizeT"></div>

<div class="resizeR"></div>

<div class="resizeB"></div>

<div class="resizeLT"></div>

<div class="resizeTR"></div>

<div class="resizeBR"></div>

<div class="resizeLB"></div>

<div class="content">

① 窗口可以拖动；<br />

② 窗口可以通过八个方向改变大小；<br />

③ 窗口可以最小化、最大化、还原、关闭；<br />

④ 限制窗口最小宽度/高度。

</div>

</div>

<div><A href="http://www.999jiujiu.com/">http://www.999jiujiu.com/</A></div>

</body>

</html>

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