<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
.progress{position: relative; width:300px;margin:100px auto;}
.progress_bg{height: 10px; border: 1px solid #ddd; border-radius: 5px; overflow: hidden;background-color:#f2f2f2;}
.progress_bar{background: #5FB878; width: 0; height: 10px; border-radius: 5px;}
.progress_btn{width: 20px; height: 20px; border-radius: 5px; position: absolute;background:#fff;
left: 0px; margin-left: -10px; top:-5px; cursor: pointer;border:1px #ddd solid;box-sizing:border-box;}
.progress_btn:hover{border-color:#F7B824;}
</style>
</head>
<body>
<div class="progress">
<div class="progress_bg">
<div class="progress_bar"></div>
</div>
<div class="progress_btn"></div>
<div class="text">30%</div>
</div>
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script type="text/javascript">
$(function(){
// e.pageX显示鼠标指针的位置：
// 变量left为progress_btn靠左的距离,也等于精度条的宽度
var tag = false,ox = 0,left = 0,bgleft = 0;
$('.progress_btn').mousedown(function(e) {
console.log( e.pageX);
console.log(left);
ox = e.pageX - left;
console.log(ox);
tag = true;
});
$(document).mouseup(function() {
tag = false;
});
//left的总的长度不能超过设置的progress的宽度;,所以用最大宽度做判断;
$('.progress').mousemove(function(e) {//鼠标移动
if (tag) {
//这个left的值等于鼠标指针的位置减去鼠标的位置减去的宽度值
left = e.pageX - ox;
if (left <= 0) {
left = 0;
}else if (left > 300) {
left = 300;
}
$('.progress_btn').css('left', left);
$('.progress_bar').width(left);
$('.text').html(parseInt((left/300)*100) + '%');
}
});
$('.progress_bg').click(function(e) {//鼠标点击
if (!tag) {
//获取.progress_bg的相关坐标
bgleft = $('.progress_bg').offset().left;
left = e.pageX - bgleft;
if (left <= 0) {
left = 0;
}else if (left > 300) {
left = 300;
}
$('.progress_btn').css('left', left);
$('.progress_bar').animate({width:left},300);
$('.text').html(parseInt((left/300)*100) + '%');
}
});
});
</script>
</body>
</html>
