jqury.jqzoom插件--放大镜

<!DOCTYPE html>

<html>

<head lang="en">

    <meta charset="UTF-8">

    <title></title>

    <style>

        /*jQzoom*/

        .jqzoom{

            border:1px solid #BBB;

            float:left;

            position:relative;

            padding:0px;

            cursor:pointer;

        }

        div.zoomdiv {

            z-index:    999;

            position                : absolute;

            top:0px;

            left:0px;

            width                   : 200px;

            height                  : 200px;

            background: #ffffff;

            border:1px solid #CCCCCC;

            display:none;

            text-align: center;

            overflow: hidden;

        }

        div.jqZoomPup {

            z-index                 : 999;

            visibility              : hidden;

            position                : absolute;

            top:0px;

            left:0px;

            width                   : 50px;

            height                  : 50px;

            border: 1px solid #aaa;

            background: #ccc;

            opacity: 0.5;

            -moz-opacity: 0.5;

            -khtml-opacity: 0.5;

            filter: alpha(Opacity=50);

        }

    </style>

</head>

<body>

<div class="jqzoom">

    <img src="2.jpg"  alt=""  jqimg="1.jpg"/>

</div>

</body>

<script src="jquery-1.11.3.min.js" type="text/javascript"></script>

<script src="jquery.jqzoom.js" type="text/javascript"></script>

<script>

    $(function() {

        $(".jqzoom").jqueryzoom({

            xzoom: 300, //放大图的宽度(默认是 200)

            yzoom: 300, //放大图的高度(默认是 200)

            offset: 10, //离原图的距离(默认是 10)

            position: "right", //放大图的定位(默认是 "right")

            preload: 1

        });

    });

</script>

</html>

html

//**************************************************************

// jQZoom allows you to realize a small magnifier window,close

// to the image or images on your web page easily.

//

// jqZoom version 2.2

// Author Doc. Ing. Renzi Marco(www.mind-projects.it)

// First Release on Dec 05 2007

// i'm looking for a job,pick me up!!!

// mail: renzi.mrc@gmail.com

//**************************************************************  

(function($){

    $.fn.jqueryzoom = function(options){

        var settings = {

            xzoom: 200,     //zoomed width default width

            yzoom: 200,     //zoomed div default width

            offset: 10,     //zoomed div default offset

            position: "right" ,//zoomed div default position,offset position is to the right of the image

            lens:1, //zooming lens over the image,by default is 1;

            preload: 1

        };

        if(options) {

            $.extend(settings, options);

        }

        var noalt='';

        $(this).hover(function(){

            var imageLeft = $(this).offset().left;

            var imageTop = $(this).offset().top;

            var imageWidth = $(this).children('img').get(0).offsetWidth;

            var imageHeight = $(this).children('img').get(0).offsetHeight;

            noalt= $(this).children("img").attr("alt");

            var bigimage = $(this).children("img").attr("jqimg");

            $(this).children("img").attr("alt",'');

            if($("div.zoomdiv").get().length == 0){

                $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");

                $(this).append("<div class='jqZoomPup'> </div>");

            }

            if(settings.position == "right"){

                if(imageLeft + imageWidth + settings.offset + settings.xzoom > screen.width){

                    leftpos = imageLeft  - settings.offset - settings.xzoom;

                }else{

                    leftpos = imageLeft + imageWidth + settings.offset;

                }

            }else{

                leftpos = imageLeft - settings.xzoom - settings.offset;

                if(leftpos < 0){

                    leftpos = imageLeft + imageWidth  + settings.offset;

                }

            }

            $("div.zoomdiv").css({ top: imageTop,left: leftpos });

            $("div.zoomdiv").width(settings.xzoom);

            $("div.zoomdiv").height(settings.yzoom);

            $("div.zoomdiv").show();

            if(!settings.lens){

                $(this).css('cursor','crosshair');

            }

            $(document.body).mousemove(function(e){

                mouse = new MouseEvent(e);

                /*$("div.jqZoomPup").hide();*/

                var bigwidth = $(".bigimg").get(0).offsetWidth;

                var bigheight = $(".bigimg").get(0).offsetHeight;

                var scaley ='x';

                var scalex= 'y';

                if(isNaN(scalex)|isNaN(scaley)){

                    var scalex = (bigwidth/imageWidth);

                    var scaley = (bigheight/imageHeight);

                    $("div.jqZoomPup").width((settings.xzoom)/scalex );

                    $("div.jqZoomPup").height((settings.yzoom)/scaley);

                    if(settings.lens){

                        $("div.jqZoomPup").css('visibility','visible');

                    }

                }

                xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;

                ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop ;

                if(settings.lens){

                    xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;

                    ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;

                }

                if(settings.lens){

                    $("div.jqZoomPup").css({ top: ypos,left: xpos });

                }

                scrolly = ypos;

                $("div.zoomdiv").get(0).scrollTop = scrolly * scaley;

                scrollx = xpos;

                $("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;

            });

        },function(){

            $(this).children("img").attr("alt",noalt);

            $(document.body).unbind("mousemove");

            if(settings.lens){

                $("div.jqZoomPup").remove();

            }

            $("div.zoomdiv").remove();

        });

        count = 0;

        if(settings.preload){

            $('body').append("<div style='display:none;' class='jqPreload"+count+"'>sdsdssdsd</div>");

            $(this).each(function(){

                var imagetopreload= $(this).children("img").attr("jqimg");

                var content = jQuery('div.jqPreload'+count+'').html();

                jQuery('div.jqPreload'+count+'').html(content+'<img src=\"'+imagetopreload+'\">');

            });

        }

    }

})(jQuery);

function MouseEvent(e) {

    this.x = e.pageX;

    this.y = e.pageY;

}

jquery.jqzoom.js

class名是jqzoom的div中，img的src属性中放的是小图的路径，jqimg属性中放的是对应大图的路径

巴特西

jqury.jqzoom插件--放大镜

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