jquery图片放大镜功能的实例代码

jquery图片放大镜功能的实例代码

  

复制代码 代码如下:

  /*放大镜*/

  .ZoomMain {margin:100px;width:395px;height:460px;float:left;position:relative;}

  .ZoomMain .zoom {height:393px;width:393px;position:relative;border: 1px solid #dcdddd;}

  .ZoomMain .zoom .move{position:absolute;left:0; top:0;display:none;width:195px; height:195px;background:#000;opacity:0.2;filter:Alpha(Opacity=20);}

  .ZoomMain .zoomDetail{display:none;border:1px solid #DCDDDD;width:393px; height:393px; position:absolute;right:-405px;top:0px; overflow:hidden;}

  .littleImg {margin-top:10px;height:54px;overflow:hidden;position:relative;}

  .littleImg span {position: absolute;display:block;width:10px;height:55px;background:#999;cursor:pointer;}

  .littleImg span em {display: none;width:10px;height:55px;}

  .littleImg span.btnL {left:0;background: url(oohdear/images/cssPos/UltimatePageCssPos.gif) no-repeat left top;}

  .littleImg span.btnL em {background: url(oohdear/images/cssPos/UltimatePageCssPos.gif) no-repeat left -57px;}

  .littleImg span.btnR em {background: url(oohdear/images/cssPos/UltimatePageCssPos.gif) no-repeat -10px -57px;}

  .littleImg span.btnR {right:0;background: url(oohdear/images/cssPos/UltimatePageCssPos.gif) no-repeat -10px top;}

  .littleImg span.hover em {display:block;}

  .littleImg .slideMain {width:343px;height:55px;margin-left:26px;overflow:hidden;position:relative;}

  .littleImg .slideMain ul {position:absolute;left:0;width:355px;padding-top:1px;}

  .littleImg .slideMain ul li {float:left;margin-right:6px;cursor:pointer;width:50px;height:50px;border:1px solid #dbdbdb;}

  .littleImg .slideMain ul li.selected {border-color:#999;}

  .littleImg .slideMain ul li img {float:left;width:50px;height:50px;}

  /*放大镜end*/

  </style>

  </head>

  <body>

  <!--放大镜-->

  <div class="ZoomMain">

  <div class="zoom">

  <span class="move"></span>

  <img width="393" height="390"  src="1347000569971.jpg" />

  </div>

  <div class="littleImg">

  <span class="btnL"><em></em></span>

  <span class="btnR"><em></em></span>

  <div class="slideMain">

  <ul class="clearfix">

  <li class="selected"><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  <li><img width="50" height="50" src="1347000569971.jpg" medium-img="1347000569971.jpg" large-img="1347000569971.jpg" /></li>

  <li><img width="50" height="50" src="1347000590691.jpg" medium-img="1347000590691.jpg" large-img="1347000590691.jpg" /></li>

  </ul>

  </div>

  </div>

  <div class="zoomDetail">

  <img width="701" height="701" src="1347000569971.jpg" />

  </div>

  </div>

  <!--放大镜end-->

  

  ?<script type="text/javascript">

  /**

  @开发:杨永

  @功能:实现细节放大,图片对应切换,自由定义css样式实现自由铺满视口等功能

  @说明:基于jQ的放大镜插件,可根据需要自由调整布局来适应各种设计效果

  */

  (function(){

  function Zoom(object){

  this.zoomArea=$(".zoom",object);//保存促发放大效果的区域

  this.moveArea=$(".move",object);//保存移动区域

  this.zoomDetail=$(".zoomDetail",object);//保存放大镜区域

  this.zoomDetailImg=$("img",this.zoomDetail);//保存放大镜里面的图

  this.zoomAreaWidth=this.zoomArea.width();

  this.moveAreaWidth=this.moveArea.width();

  this.zoomAreaHeight=this.zoomArea.height();

  this.moveAreaHeight=this.moveArea.height();

  this.zoomDetailWidth=this.zoomDetail.width();

  this.zoomDetailHeight=this.zoomDetail.height();

  this.zoomAreaOffset=this.zoomArea.offset();//初始化放大区域在视口中的相对偏移;

  this.XY=null;//初始化鼠标相对于放大区域的偏移偏移值

  this.moveBili=null;//

  var _this_=this;

  this.zoomArea.mousemove(function(e){//当鼠标在放大区域移动的时候执行

  _this_.move(e.pageX,e.pageY);

  }).mouseover(function(){

  _this_.moveArea.show();

  _this_.zoomDetail.show();

  }).mouseout(function(){

  _this_.moveArea.hide();

  _this_.zoomDetail.hide();

  });

  this.calculate();//初始化并计算出需要的比例值

  //以下是小图部分的功能实现

  this.l=0;

  this.scrollObj=$(".slideMain ul",object);//保存ul滚动对象

  this.lis=this.scrollObj.children();//保存小图片列表

  this.btnR=$(".btnR",object);//保存右边按钮

  this.btnL=$(".btnL",object);//保存左边边按钮

  this.lis.click(function(){

  _this_.changeImgSrc(this);

  });

  if(this.lis.length>6){//判断图片数是否超出显示区域,是的话就注册滚动事件

  this.s=this.lis.length-6;//获取多余出来的图片数

  this.scrollObj.width(60*this.lis.length+"px");//当图片数超出默认值时,设置ul的宽度

  this.btnL.click(function(){_this_.scrollRight();}).mouseover(function(){$(this).addClass("hover")}).mouseout(function(){$(this).removeClass("hover");});

  this.btnR.click(function(){_this_.scrollLeft();}).mouseover(function(){$(this).addClass("hover")}).mouseout(function(){$(this).removeClass("hover");});;

  }

  };

  Zoom.prototype={

  scrollLeft:function(){

  if(Math.abs(this.l)==this.s){return};

  this.l--;

  this.scrollObj.animate({left:this.l*58+"px"},"fast");

  },

  scrollRight:function(){

  if(this.l==0){return};

  this.l++;

  this.scrollObj.animate({left:this.l*58+"px"},"fast");

  },

  changeImgSrc:function(o){

  //改变标识样式

  $(o).addClass("selected").siblings().removeClass("selected");

  this.zoomArea.find("img").attr("src",$(o).find("img").attr("medium-img"));

  this.zoomDetailImg.attr("src",$(o).find("img").attr("medium-img"));

  },

  move:function(x,y){//鼠标在放大区域移动的时候执行的函数

  this.XY=this.mousePosAndSetPos(x,y);//计算出鼠标相对于放大区域的x,y值

  //设置滑块的位置

  this.moveArea.css({

  left:this.XY.offsetX+"px",

  top:this.XY.offsetY+"px"

  });

  //设置大图在细节位置

  this.zoomDetailImg.css({

  marginLeft:-this.XY.offsetX*this.moveBili+"px",

  marginTop:-this.XY.offsetY*this.moveBili+"px"

  });

  },

  mousePosAndSetPos:function(x,y){//实时计算并设置滑块的位置

  x=x-this.zoomAreaOffset.left-this.moveArea.width()/2;

  y=y-this.zoomAreaOffset.top-this.moveArea.height()/2;

  x=x<0?0:x;

  y=y<0?0:y;

  x=x>(this.zoomAreaWidth-this.moveAreaWidth)?this.zoomAreaWidth-this.moveAreaWidth:x;

  y=y>(this.zoomAreaHeight-this.moveAreaHeight)?this.zoomAreaHeight-this.moveAreaHeight:y;

  return {

  offsetX:x,

  offsetY:y

  };

  },

  calculate:function(){//计算函数

  var widthBili,heightBili;

  //计算移动的滑块与放大镜铺面显示的比例宽高

  widthBili=(this.zoomAreaWidth*this.zoomDetailWidth)/this.moveAreaWidth;

  heightBili=(this.zoomAreaHeight*this.zoomDetailHeight)/this.moveAreaHeight;

  //把比出来的宽高

  this.zoomDetailImg.css({width:widthBili+"px",height:heightBili+"px"});

  //返回移动的比例

  this.moveBili=(widthBili-this.zoomDetailWidth)/(this.zoomAreaWidth-this.moveAreaWidth);

  }

  };

  var zoom=new Zoom($(".ZoomMain").eq(0));

  })();