web前端|js教程
JS,窗口拖拽
web前端-js教程
本文实例讲述了JS实现漂亮的窗口拖拽效果。分享给大家供大家参考。具体如下：
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这是一款漂亮的JS窗口拖拽效果（改变大小/最小化/最大化/还原/关闭）
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特点：
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① 窗口可以拖动；
② 窗口可以通过八个方向改变大小；
③ 窗口可以最小化、最大化、还原、关闭；
④ 限制窗口最小宽度/高度。
运行效果截图如下：
在线演示地址如下：
/js//js-win-drug-cha-close-demo/
具体代码如下：
窗口拖拽（改变大小/最小化/最大化/还原/关闭）body,div,h2{margin:0;padding:0;}body{background:url(images/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(images/tool.jpg) 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(images/resize.jpg) 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;} /*-------------------------- + 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 = 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 maxW && (iW = maxW);lockX || (oParent.style.width = iW + "px");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";}
这是一个可以拖动的窗口
① 窗口可以拖动；
② 窗口可以通过八个方向改变大小；
③ 窗口可以最小化、最大化、还原、关闭；
④ 限制窗口最小宽度/高度。
