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  • 自制滑杆slider

    一、效果图

    二、HTML结构

    1 <div id="d2">
    2   <p>自制可拖动滑块:</p>
    3   <div id="out">
    4     <div id="filling"> </div>
    5     <div id="innerimg"></div>
    6   </div>
    7   <p id="txt">音量:0</p>
    8  </div>

    第一个div是轨道,第二个是填充物,第三个是滑块

    三、CSS样式

     1 #out {/* 滑块轨道 */
     2     position: relative;
     3     width: 160px;
     4     height: 12px;
     5     margin-top: 10px;
     6     margin-left: 0px;
     7     border: 1px solid #28C561;
     8     border-radius: 10px;
     9     box-shadow: 1px 1px 2px 0px inset;/* 轨道内阴影 */
    10     cursor: pointer;
    11 }
    12 #filling {/* 填充物 */
    13     height: 100%;
    14     margin-left: 0px;
    15     width: 0px;
    16     background: linear-gradient(to right, #0089ff , #00fff3); /* 填充效果的渐变 */
    17     background: -webkit-linear-gradient(left, #0089ff , #00fff3);
    18     background: -o-linear-gradient(right, #0089ff , #00fff3);
    19     background: -moz-linear-gradient(right, #0089ff , #00fff3);
    20     border-top-left-radius: 10px;
    21     border-bottom-left-radius: 10px;
    22     box-shadow: 2px -1px 5px 1px inset;
    23 }
    24 #innerimg {/* 滑块样式 */
    25     position: absolute;
    26     left: 0px;
    27     top: -8px;
    28     margin-left: 0px;
    29     width: 25px;
    30     height: 25px;
    31     cursor: pointer;
    32     background-color: #66F40E;
    33     border-radius: 50%;
    34     box-shadow: 0px 2px 1px 0px #0d11128a, 0px -1px 19px rgba(0, 0, 0, 0.9) inset; /* 使滑块具有3D感 */
    35 }

    样式可以随便改

    四、JS代码

     

    如图所示,将out设置为参考项,有两种情况:

    (1)、点击out框的任何部位,滑块自动划过去并且filling填满滑块后面的地区

    (2)、滑动滑块调节

     原理很简单:以out为参照,当点击out的任意部分时,将InnerImg的坐标更新到鼠标点击部位,将filling的width设置成鼠标点击部位与out左边框的距离,就可以看到效果。

    步骤:

    a). 先获取页面元素:

    1 var innerpro = document.getElementById('innerimg')
    2 var out = document.getElementById('out')
    3 var filling = document.getElementById('filling')
    4 var txt = document.getElementById('txt')
    5 var target

    b). 添加out的点击事件:

     1 function dvnamicprogress () {
     2   /**
     3    * @author Qiang
     4    * @function dvnamicprogress -- 滑杆
     5    */
     6   if (document.addEventListener) {
     7     /* addEventListener属性IE9.0才支持 */
     8     out.addEventListener('click', fillingClick, false)
     9   } else if (document.attachEvent) {
    10     out.attachEvent('click', fillingClick, false)
    11   }
    12 }

    当鼠标在out内点击时,获取鼠标位置,设置filling宽度和内部滑块innerimg的left

     1 function fillingClick (event) {
     2  2   event.stopPropagation()
     3  3   if (event.touches) {
     4  4     target = event.touches[0]
     5  5   } else {
     6  6     target = event || window.event
     7  7   }/* 兼容移动端,但是发现没有兼容ie8及以下…… */
     8  8   var sliderLeft = target.clientX - 45  /* 减去的45=滑块的宽度25+整天滑杆距离视图左边框的距离20 */
     9  9   var fillingWidth = target.clientX - 45
    10 10   if (sliderLeft <= 0) {
    11 11     sliderLeft = 0
    12 12   }/* filling的宽度不能小于0,滑块的位置不能超出out左边界 */
    13 13   if (fillingWidth <= 0) {
    14 14     fillingWidth = 0
    15 15   }
    16 16   txt.innerHTML = '音量:' + parseInt(sliderLeft / 135 * 100)
    17 17   innerpro.style.left = sliderLeft + 'px'
    18 18   filling.style.width = fillingWidth + 5 + 'px'
    19 19   // console.log('鼠标的位置:X=>' + target.clientX + ', Y=>' + target.clientY)
    20 20   // console.log('滑块的位置:' + sliderLeft)
    21 21 }

    c). 添加移动滑块innerimg的事件

     1 function dvnamicprogress () {
     2   /**
     3    * @author Qiang
     4    * @function dvnamicprogress -- 滑杆
     5    */
     6   if (document.addEventListener) {
     7     /* addEventListener属性IE9.0才支持 */
     8     out.addEventListener('click', fillingClick, false)
     9     innerpro.addEventListener('touchstart', fillingMove, {passive: true}, false)
    10     innerpro.addEventListener('mousedown', fillingMove, false)
    11   } else if (document.attachEvent) {
    12     out.attachEvent('click', fillingClick, false)
    13     innerpro.attachEvent('touchstart', fillingMove, {passive: true}, false)
    14     innerpro.attachEvent('mousedown', fillingMove, false)
    15   }
    16 }
     1 function fillingMove (event) {
     2   /* addEventListener属性IE9.0才支持 */
     3   if (document.addEventListener) {
     4     innerpro.addEventListener('touchmove', sliderMove, {passive: true}, false)
     5     document.addEventListener('mousemove', sliderMove, false)
     6     document.addEventListener('mouseup', clear, false)
     7   } else if (document.attachEvent) {
     8     innerpro.attachEvent('touchmove', sliderMove, {passive: true}, false)
     9     document.attachEvent('mousemove', sliderMove, false)
    10     document.attachEvent('mouseup', clear, false)
    11   }
    12 }

    当鼠标按下时给innerimg添加一个onmousemove事件,不断更新位置

     1 function sliderMove (event) {
     2   if (event.touches) {
     3     target = event.touches[0]
     4   } else {
     5     target = event || window.event
     6   }
     7   // console.log('鼠标的位置:X=>' + target.clientX + ', Y=>' + target.clientY)
     8   var prolong = target.clientX - 45
     9   if (prolong < 0) {
    10     prolong = 0
    11   } else if (prolong > 135) {
    12     prolong = 135
    13   }
    14   txt.innerHTML = '音量:' + parseInt(prolong / 135 * 100)
    15   filling.style.width = prolong + 5 + 'px'
    16   innerpro.style.left = prolong + 'px'
    17 }

    当鼠标按键弹起时,清除所有事件:

     1 function clear () {
     2   if (document.addEventListener) {
     3     document.removeEventListener('mousemove', sliderMove, false)
     4     document.removeEventListener('mousedown', fillingMove, false)
     5   } else if (document.attachEvent) {
     6     document.attachEvent('mousemove', sliderMove, false)
     7     document.attachEvent('mousedown', fillingMove, false)
     8   }
     9 }
    10 window.onload = function () {
    11   staticProgress()
    12   dvnamicprogress()
    13 }

    这里的样式比较丑,因为轨道宽一点好写,可以美化一下:

     1 #out {
     2     position: relative;
     3     width: 160px;
     4     height: 3px;
     5     margin-top: 10px;
     6     margin-left: 0px;
     7     border-radius: 10px;
     8     background-color: #737272;
     9     cursor: pointer;
    10 }
    11 #filling {
    12     height: 100%;
    13     margin-left: 0px;
    14     width: 0px;
    15     background-color:#00fff3;
    16     border-top-left-radius: 10px;
    17     border-bottom-left-radius: 10px;
    18 }
    19 #innerimg {
    20     position: absolute;
    21     left: 0px;
    22     top: -11px;
    23     margin-left: 0px;
    24     width: 25px;
    25     height: 25px;
    26     cursor: pointer;
    27     background-color: #ffffff;
    28     border-radius: 50%;
    29     box-shadow: 0px 1px 6px 0px #0d1112c7, 0px -1px 19px rgba(0, 0, 0, 0) inset;
    30 }
    31 #txt{
    32     font-size:5px;
    33 }
    View Code

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  • 原文地址:https://www.cnblogs.com/wz71014q/p/8856064.html
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