72 lines
3.1 KiB
JavaScript
72 lines
3.1 KiB
JavaScript
!function($){
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/**
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* Description: jquery飘窗插件，可自适应浏览器宽高的变化
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* Author: ddqre12345
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* CreateTime: 2017.5.3
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* param: args={startL:default, startT:default, angle:-Math.PI/4, speed: 125}
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* 参数说名: startL飘窗初始时距离左边的距离, startT飘窗初始化距离顶部的距离, angle飘窗初始运动方向, speed运动速度(px/s)
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*/
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$.fn.autoMove = function(args){
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//先定义一些工具函数判断边距
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function isTop(pos, w_w, w_h, d_w, d_h){//飘窗到达上边距
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return (pos.top<=0) ? true : false;
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}
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function isBottom(pos, w_w, w_h, d_w, d_h){//飘窗到达下边距
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return (pos.top>=(w_h-d_h)) ? true : false;
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}
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function isLeft(pos, w_w, w_h, d_w, d_h){//飘窗到达左边距
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return (pos.left<=0) ? true : false;
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}
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function isRight(pos, w_w, w_h, d_w, d_h){//飘窗到达右边距
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return (pos.left>=(w_w-d_w)) ? true : false;
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}
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return this.each(function(){
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var w_w = parseInt($(window).width()),
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w_h = parseInt($(window).height()),
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d_w = parseInt($(this).width()),
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d_h = parseInt($(this).height()),
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d_l = (w_w-d_w)/2,
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d_t = (w_h-d_h)/2,
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max_l = w_w - d_w;
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max_t = w_h - d_h;
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//位置及参数的初始化
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var setobj = $.extend({startL:d_l, startT:d_t, angle:Math.PI/4, speed:100}, args);
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$(this).css({position: 'fixed', left: setobj['startL']+'px', top: setobj['startT']+'px'});
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var position = {left: setobj['startL'], top: setobj['startT']};//飘窗位置对象
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var that = $(this);
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var angle= setobj.angle;
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var time = 10;//控制飘窗运动效果，值越小越细腻
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var step = setobj.speed * (time/1000);//计算运动步长
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var decoration = {x:step*Math.cos(angle), y:step*Math.sin(angle)};//计算二维上的运动增量
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var mvtid;
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$(window).on('resize', function(){//窗口大小变动时重新设置运动相关参数
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w_w = parseInt($(window).width());
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w_h = parseInt($(window).height());
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max_l = w_w - d_w;
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max_t = w_h - d_h;
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});
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function move(){
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position.left += decoration.x;
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position.top += decoration.y;
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if(isLeft(position, w_w, w_h, d_w, d_h)||isRight(position, w_w, w_h, d_w, d_h)){
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decoration.x = -1*decoration.x;
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}
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if(isRight(position, w_w, w_h, d_w, d_h)){
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position.left = max_l;
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}
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if(isTop(position, w_w, w_h, d_w, d_h)||isBottom(position, w_w, w_h, d_w, d_h)){
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decoration.y = -1*decoration.y;
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}
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if(isBottom(position, w_w, w_h, d_w, d_h)){
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position.top = max_t;
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}
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//that.css({left:position.left, top:position.top});
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that.animate({left:position.left, top:position.top}, time);//改用jquery动画函数使其更加平滑
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mvtid = setTimeout(move, time);//递归调用，使飘窗连续运动
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}
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move();//触发动作
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that.on('mouseenter', function(){ clearTimeout(mvtid) });//添加鼠标事件
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that.on('mouseleave', function(){ move() });
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});
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}; //end plugin definition
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}(jQuery); |