jquery实现的一个网页飘窗小插件

来源：互联网发布：js 重力感应全景编辑：程序博客网时间：2024/05/16 08:12
页面结构及测试代码：
<!DOCTYPE html><html>    <head>        <meta charset="utf-8">        <title>test</title>        <!-- 引入jquery脚本库，必须 -->        <script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>        <style type="text/css">        /* 给飘窗添加一些基础样式，如宽度，高度和背景颜色等等 */        .automv{width: 200px;height: 200px;background-color: blue;}        </style>    </head>    <body>        <!-- 飘窗元素 -->        <div class="automv"></div>        <script type="text/javascript">        //定义插件        !function($){        /**        * Description: jquery飘窗插件，可自适应浏览器宽高的变化        * Author: YZCS        * CreateTime: 2015-04-25        * param: args={startL:default, startT:default, angle:-Math.PI/4, speed: 125}         * 参数说名: startL飘窗初始时距离左边的距离, startT飘窗初始化距离顶部的距离, angle飘窗初始运动方向, speed运动速度(px/s)        * CopyRight: GPL         */        $.fn.autoMove = function(args){            //先定义一些工具函数判断边距            function isTop(pos, w_w, w_h, d_w, d_h){//飘窗到达上边距                if(pos.top<=0){                    return true;                }else{                    return false;                }            }            function isBottom(pos, w_w, w_h, d_w, d_h){//飘窗到达下边距                if(pos.top>=(w_h-d_h)){                    return true;                }else{                    return false;                }            }            function isLeft(pos, w_w, w_h, d_w, d_h){//飘窗到达左边距                if(pos.left<=0){                    return true;                }else{                    return false;                }            }            function isRight(pos, w_w, w_h, d_w, d_h){//飘窗到达右边距                if(pos.left>=(w_w-d_w)){                    return true;                }else{                    return false;                }            }            return this.each(function(){                var w_w = parseInt($(window).width()),                    w_h = parseInt($(window).height()),                    d_w = parseInt($(this).width()),                    d_h = parseInt($(this).height()),                    d_l = (w_w-d_w)/2,                    d_t = (w_h-d_h)/2,                    max_l = w_w - d_w;                    max_t = w_h - d_h;                    //位置及参数的初始化                var setobj = $.extend({startL:d_l, startT:d_t, angle:Math.PI/4, speed:100}, args);                $(this).css({position: 'absolute', left: setobj['startL']+'px', top: setobj['startT']+'px'});                var position = {left: setobj['startL'], top: setobj['startT']};//飘窗位置对象                var that = $(this);                var angle= setobj.angle;                var time = 10;//控制飘窗运动效果，值越小越细腻                var step = setobj.speed * (time/1000);//计算运动步长                var decoration = {x:step*Math.cos(angle), y:step*Math.sin(angle)};//计算二维上的运动增量                var mvtid;                $(window).on('resize', function(){//窗口大小变动时重新设置运动相关参数                    w_w = parseInt($(window).width()),                    w_h = parseInt($(window).height()),                    max_l = w_w - d_w;                    max_t = w_h - d_h;                });                function move(){                    position.left += decoration.x;                    position.top  += decoration.y;                    if(isLeft(position, w_w, w_h, d_w, d_h)||isRight(position, w_w, w_h, d_w, d_h)){                        decoration.x = -1*decoration.x;                    }                    if(isRight(position, w_w, w_h, d_w, d_h)){                        position.left = max_l;                    }                    if(isTop(position, w_w, w_h, d_w, d_h)||isBottom(position, w_w, w_h, d_w, d_h)){                        decoration.y = -1*decoration.y;                    }                    if(isBottom(position, w_w, w_h, d_w, d_h)){                        position.top = max_t;                    }                    //that.css({left:position.left, top:position.top});                    that.animate({left:position.left, top:position.top}, time);//改用jquery动画函数使其更加平滑                    mvtid = setTimeout(move, time);//递归调用，使飘窗连续运动                }                move();//触发动作                that.on('mouseenter', function(){ clearTimeout(mvtid) });//添加鼠标事件                that.on('mouseleave', function(){ move() });            });        }//end plugin definition        }(jQuery);        </script>        <script type="text/javascript">        //测试插件        $('.automv').moveAuto({angle:-Math.PI/4, speed:120});        </script>    </body></html>
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