jquery图片放大镜功能的实例代码_Javascript教程-查字典教程网

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>

<div>

</div>

<div>

<div>

<ul>

</ul>

</div>

<div>

</div>

?<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));

})();