继 javascript 简单的图片放大效果(一) 之后,把这个效果完善了一下,支持多图轮流切换,如下:
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本次采用代码封装到一个对象的模式,和***次函数式写法不一下,这样更清晰,添加自定义属性更方便,全部代码如下:
大图的地址用自定义属性的方式显示在标签如
图片放大实例 - * {
- margin: 0;
- padding: 0;
- }
- #zoomWarp {
- width: 1000px;
- margin: 20px auto;
- overflow: hidden;
- }
- #smallwarp {
- position: relative;
- border: 1px solid #000;
- width: 300px;
- height: 300px;
- float: left;
- overflow: hidden;
- }
- #minImg {
- float: left;
- display: inline;
- margin-right: 5px;
- }
- #minImg li {
- width: 70px;
- height: 70px;
- overflow: hidden;
- background: #ccc;
- margin-bottom: 5px;
- border: 1px solid #333;
- cursor: pointer;
- list-style: none;
- }
- #minImg li.lastChild {
- margin-bottom: 0;
- }
- var zoomImg = function () {
- return {
- init:function (warpId, options) {
- this.zoomWarp = VVG.$(warpId); //获取外层包裹层
- var sWarp = options.smallWarp || 'smallwarp'; //小图包裹层ID
- var smallWarp = this.smallWarp = VVG.$(sWarp); //获取小图包裹层
- this.targetImg = VVG.$$('img', smallWarp)[0]; //获取放大的目标图片对象
- thisthis.bigImgUrl = this.targetImg.getAttribute('zoom'); //从目标图片对象的自定义属性读取大图的URL
- this.bindMove();
- this.bindMinImg();
- },
- createMask:function () {
- var mask = this.mask = document.createElement("div"); //创建MASK层
- mask.id = "mask";
- // 设置CSS
- VVG.setStyleById(mask, {
- "position":"absolute",
- "z-index":100,
- "display":"none",
- "width":"100px",
- "height":"100px",
- "background":"#999",
- "border":"1px solid #000",
- "cursor":"crosshair",
- "opacity":80,
- "left":0,
- "top":0
- });
- this.smallWarp.appendChild(mask); //添加MASK层
- },
- createBigDiv:function () {
- var bigDiv = this.bigDiv = document.createElement("div"); //创建大图显示层
- bigDiv.id = "big";
- VVG.setStyleById(bigDiv, {
- "float":"left",
- "border":"1px solid #000",
- "display":"none",
- "width":"300px",
- "height":"300px",
- "overflow":"hidden",
- "border-left":"none",
- "position":"relative",
- "z-index":"100"
- });
- // 创建大图
- var bigImg = this.bigImg = document.createElement('img');
- bigImg.setAttribute('src', this.bigImgUrl);
- bigImg.id = 'bigImg';
- bigImg.style.position = 'absolute';
- bigDiv.appendChild(bigImg);
- this.zoomWarp.appendChild(bigDiv); //添加大图显示层
- },
- show:function () { // 显示悬浮遮罩层和放大图片层
- this.mask.style.display = 'block';
- this.bigDiv.style.display = 'block';
- },
- hidden:function () { //隐藏层
- this.mask.style.display = 'none';
- this.bigDiv.style.display = 'none';
- },
- zoomIng:function (event) { //开始放大
- this.show(); //显示
- event = VVG.getEvent(event); //获取事件
- var target = this.mask;
- var maskW = target.offsetWidth;
- var maskH = target.offsetHeight;
- //console.log(maskW +':'+maskH);
- var sTop = document.documentElement.scrollTop || document.body.scrollTop;
- var mouseX = event.clientX;
- var mouseY = event.clientY + sTop;
- var smallX = this.smallWarp.offsetLeft;
- var smallY = this.smallWarp.offsetTop;
- var smallW = this.smallWarp.offsetWidth;
- var smallH = this.smallWarp.offsetHeight;
- //console.log('x=' + mouseX + ':y=' + mouseY + ':' + sTop + 'smallX:' + smallX);
- target.style.left = (mouseX - smallX - maskW / 2 ) + "px";
- target.style.top = (mouseY - smallY - maskH / 2 ) + "px";
- //显示位置计算
- if ((mouseX - smallX) < maskW / 2) {
- target.style.left = "0px";
- } else if ((mouseX - smallX) > (smallW - maskW + maskW / 2)) {
- target.style.left = (smallW - maskW ) + "px";
- }
- if ((mouseY - smallY) < maskH / 2) {
- target.style.top = "0px";
- } else if ((mouseY - smallY) > (smallH - maskH + maskH / 2)) {
- target.style.top = (smallH - maskH) + "px";
- }
- this.showBig(parseInt(target.style.left), parseInt(target.style.top));
- },
- showBig:function (left, top) {
- left = Math.ceil(left * 3);
- top = Math.ceil(top * 3);
- this.bigImg.style.left = -left + "px";
- this.bigImg.style.top = -top + "px";
- },
- bindMove:function () {
- this.createMask();
- this.createBigDiv();
- VVG.bindEvent(this.smallWarp, 'mousemove', VVG.bindFunction(this, this.zoomIng));
- VVG.bindEvent(this.smallWarp, 'mouseout', VVG.bindFunction(this, this.hidden));
- },
- // 以下是左侧小图鼠标放上去后右侧显示相应的大图
- bindMinImg:function () {
- var minImgUl = VVG.$('minImg'); //获取左侧的UL
- var minImgLis = VVG.$$('li', minImgUl); //获取左侧的li
- var thisthisObj = this; //this 赋值
- for (var i = 0, n = minImgLis.length; i < n; i++) {
- var liImg = VVG.$$('img', minImgLis[i])[0];
- var imgSrc = liImg.src;
- var bImgSrc = liImg.getAttribute('zoom');
- //以下闭包传值imgSrc,与bImgSrc,并绑定左侧迷你图点击事件
- VVG.bindEvent(liImg, 'click', function (t,f) {
- return function () {
- thisObj.changeImg.call(thisObj,t,f); //此处调用changeImg方法
- }
- }(imgSrc,bImgSrc));
- }
- },
- changeImg:function (imgSrc, bImgSrc) { //改变右边的图片地址
- this.targetImg.src = imgSrc;
- this.bigImg.setAttribute('src', bImgSrc);
- }
- }
- }();
- zoomImg.init('zoomWarp', {});
#p#
VVG.base库代码:
- /*
- * 简单JS库封装 By VVG
- * @namespace VVG
- * E-mail:mysheller@163.com QQ:83816819
- */
- if (!String.trim) {
- String.prototype.trim = function () {
- var reg = /^\s+|\s+$/g;
- return this.replace(reg, '');
- }
- }
- (function () {
- // create namespace VVG
- if (!window.VVG) {
- window.VVG = {};
- }
- function isCompatible(other) {
- // Use capability detection to check requirements
- if (other === false || !Array.prototype.push || !Object.hasOwnProperty || !document.createElement || !document.getElementsByTagName) {
- alert('你的浏览器不支持某些特性!');
- return false;
- }
- return true;
- }
- window.VVG.isCompatible = isCompatible;
- // getElementById function
- function $() {
- var elements = new Array();
- for (var i = 0; i < arguments.length; i++) {
- var element = arguments[i];
- if (typeof element == 'string') {
- element = document.getElementById(element);
- }
- if (!element) {
- continue;
- }
- // 如果只有一个参数,则返回
- if (arguments.length == 1) {
- return element;
- }
- // 多个参数的时候存为数组
- elements.push(element);
- }
- // 返回数组
- return elements;
- }
- window.VVG.$ = $;
- // 获取Parent父元素下标签名为child 的 Tags
- function $$(tag, parent) {
- parentparent = parent || document;
- return $(parent).getElementsByTagName(tag);
- }
- window.VVG.$$ = $$;
- // getElementsByClassName
- function $$$(str, parent, tag) {
- //父节点存在
- if (parent) {
- parent = $(parent);
- } else {
- // 未传值时,父节点为body
- parent = document;
- }
- // tagContent为节点类型,未传值时为all节点
- tagtag = tag || '*';
- // 在父节点查找子节点,建立空数组arr
- var els = parent.getElementsByTagName(tag),
- arr = [];
- for (var i = 0, n = els.length; i < n; i++) {
- // 查找每个节点下的classname,以空格分离为一个k数组
- for (var j = 0, k = els[i].className.split(' '), l = k.length; j < 1; j++) {
- // 当K数组中有一个值与str值相等时,记住这个标签并推入arr数组
- if (k[j] == str) {
- arr.push(els[i]);
- break;
- }
- }
- }
- // 返回数组
- return arr;
- }
- window.VVG.$$$ = $$$;
- window.VVG.getElementsByClassName = $$$;
- // Event事件绑定:绑定type事件到element元素,触发func函数
- function bindEvent(element, type, func) {
- if (element.addEventListener) {
- element.addEventListener(type, func, false); //false 表示冒泡
- } else if (element.attachEvent) {
- element.attachEvent('on' + type, func);
- } else {
- element['on' + type] = func;
- }
- }
- window.VVG.bindEvent = bindEvent;
- // 解除Event事件绑定
- function unbindEvent(element, type, func) {
- if (element.removeEventListener) {
- element.removeEventListener(type, func, false);
- } else if (element.detachEvent) {
- element.detachEvent('on' + type, func);
- } else {
- element['on' + type] = null;
- }
- }
- window.VVG.unbindEvent = unbindEvent;
- // 获取事件
- function getEvent(event) {
- return event || window.event;
- }
- window.VVG.getEvent = getEvent;
- // 获取事件目标
- function getTarget(event) {
- return event.target || event.srcElement;
- }
- window.VVG.getTarget = getTarget;
- // 获取鼠标位于文档的坐标
- function getMousePositionInPage(event) {
- event = getEvent(event);
- return {
- 'x':event.pageX || event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft),
- 'y':event.pageY || event.clientY + (document.documentElement.scrollTop || document.body.scrollTop)
- }
- }
- window.VVG.getMousePositionInPage = getMousePositionInPage;
- // 停止事件冒泡
- function stopPropagation(event) {
- if (event.stopPropagation) {
- event.stopPropagation();
- } else {
- event.cancelBubble = true;
- }
- }
- window.VVG.stopPropagation = stopPropagation;
- // 阻止默认事件
- function preventDefault(event) {
- if (event.preventDefault) {
- event.preventDefault();
- } else {
- event.returnValue = false;
- }
- }
- window.VVG.preventDefault = preventDefault;
- // apply从新定义函数的执行环境
- function bindFunction(obj, func) {
- return function () {
- return func.apply(obj, arguments);
- };
- }
- window.VVG.bindFunction = bindFunction;
- // 设置透明度
- function setOpacity(node, level) {
- node = $(node);
- if (document.all) {
- node.style.filter = 'alpha(opacity=' + level + ')';
- } else {
- node.style.opacity = level / 100;
- }
- }
- window.VVG.setOpacity = setOpacity;
- // 获取可视窗口尺寸
- function getWindowSize() {
- var de = document.documentElement;
- return {
- 'width':(
- window.innerWidth || (de && de.clientWidth) || document.body.clientWidth),
- 'height':(
- window.innerHeight || (de && de.clientHeight) || document.body.clientHeight)
- }
- }
- window.VVG.getWindowSize = getWindowSize;
- // 数字转化为千分位格式函数
- function thousandsNumberFormat(str) {
- var n = str.length;
- var c = n % 3;
- var reg = /\d{3}(?!$)/g;
- if (n > 3) {
- var strstr1 = str.slice(0, c);
- var strstr2 = str.slice(c, n);
- str1str1 = str1 ? str1 + ',' : '';
- str = str1 + str2.replace(reg, function (p1) {
- return p1 + ',';
- })
- }
- return str;
- }
- window.VVG.thousandsNumberFormat = thousandsNumberFormat;
- // 带横杠的字符形式转化为驼峰式命名
- function camelize(string) {
- return string.replace(/-(\w)/g, function (strMatch, p1) {
- return p1.toUpperCase();
- });
- }
- window.VVG.camelize = camelize;
- // 驼峰式转化为横杠分隔
- function uncamelize(string, sep) {
- sepsep = sep || '-';
- return string.replace(/([a-z])([A-Z])/g, function (strMatch, p1, p2) {
- return p1 + sep + p2.toLowerCase();
- });
- }
- window.VVG.uncamelize = uncamelize;
- // 设置根据ID设置样式
- function setStyleById(element, cssjson) {
- element = $(element);
- for (property in cssjson) {
- if (!cssjson.hasOwnProperty(property)) continue;
- if
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