京东放大镜

作者:我和我的小生活
本文为作者原创,转载请注明出处:https://www.cnblogs.com/mmit/p/11268710.html

<!DOCTYPE html>
<html lang="en">
    <head>
<meta charset="utf-8">
        <title>放大镜</title>
        <style type="text/css">
            *{
                padding: 0;
                margin: 0;
            }
            .box{
                width: 350px;
                height: 350px;
                margin:  100px;
                border: 1px solid #aaa;
                position: relative;
            }
            .box .thumb{
                width: 450px;
                height: 450px;
                border: 1px solid #aaa;
                overflow: hidden;
                position: absolute;
                left: 355px;
                top: 0;
                display: none;
            }
            .box .normal .zoom{
                width: 200px;
                height: 200px;
                background-color:#fdfa04;
                opacity: 0.5;
                position: absolute;
                top: 0;
                left: 0;
                cursor: move;
                display: none;
            }
            .thumb img{
                position: absolute;
                top: 0;
                left: 0;
            }
        </style>
        <script type="text/javascript">
            function $(id){
                return document.getElementById(id);
            }
            window.onload = function(){
                var box = $('zoomDiv');//normal是zoom的父节点,normal和thumb是兄弟节点
                var normal = box.children[0];
                var zoom = box.children[0].children[1];
                var thumb = box.children[1];//这是找他的第二个孩子,box的第一个儿子是normal,第二个儿子是thumb
                //先放鼠标,然后大图显示,离开,大图消失,放上去时黄色快随鼠标移动
                normal.onmouseover = function(){
                    zoom.style.display = 'block';
                    thumb.style.display = 'block';
                }
                normal.onmouseout = function(){
                    zoom.style.display = 'none';
                    thumb.style.display = 'none';
                }
                var x = 0;
                var y= 0;
                normal.onmousemove = function(event){//这一块是防止黄块出去
                    var evt = event || window.event;
                    x = evt.clientX - this.parentNode.offsetLeft - zoom.offsetWidth / 2;
                    y = evt.clientY - this.parentNode.offsetTop - zoom.offsetHeight / 2;
                    if (x < 0) {
                        x = 0;
                    }else{
                        if (x > normal.offsetWidth - zoom.offsetWidth) {
                            x = normal.offsetWidth - zoom.offsetWidth;
                        }
                    }
                    if (y < 0) {
                        y = 0;
                    }else{
                        if (y > normal.offsetHeight - zoom.offsetHeight) {
                            y = normal.offsetHeight - zoom.offsetHeight;
                        }
                    }
                    //console.log(x + ':' + y);//比例是大图/小图,前两行是移动黄块的,中间两行是计算大图移动的像素的,后两行是移动大图的
                    zoom.style.left = x + 'px';
                    zoom.style.top = y + 'px';
                    var tX = -x * 800 / normal.offsetWidth;
                    var tY = -y *800 / normal.offsetHeight;
                    thumb.children[0].style.left = tX + 'px';
                    thumb.children[0].style.top = tY + 'px';
                }
            }
        </script>
    </head>
    <body>
        <div class="box" id="zoomDiv">
            <div class="normal">
                <img src="imgs/show.jpg" alt="">
                <div class="zoom"></div>
            </div>
            <div class="thumb">
                <img src="imgs/detail.jpg">
            </div>
        </div>
    </body>
</html>
 
posted @   我和我的小生活  阅读(137)  评论(0编辑  收藏  举报
编辑推荐:
· .NET制作智能桌面机器人:结合BotSharp智能体框架开发语音交互
· 软件产品开发中常见的10个问题及处理方法
· .NET 原生驾驭 AI 新基建实战系列:向量数据库的应用与畅想
· 从问题排查到源码分析:ActiveMQ消费端频繁日志刷屏的秘密
· 一次Java后端服务间歇性响应慢的问题排查记录
阅读排行:
· 互联网不景气了那就玩玩嵌入式吧,用纯.NET开发并制作一个智能桌面机器人(四):结合BotSharp
· 一个基于 .NET 开源免费的异地组网和内网穿透工具
· 《HelloGitHub》第 108 期
· Windows桌面应用自动更新解决方案SharpUpdater5发布
· 我的家庭实验室服务器集群硬件清单
点击右上角即可分享
微信分享提示