How to use js to implement horizontal drag and drop navigation bar function-JS Tutorial-php.cn

How to use js to implement horizontal drag and drop navigation bar function

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Release： 2018-06-25 14:13:29

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This article mainly introduces the js method to implement the horizontal drag and drop navigation bar function. It has a very good reference value, let’s take a look at it

The effect is as follows:

The code is as follows:

<!DOCTYPE HTML>
<html>
<head>
 <meta charset="UTF-8">
 <title>p横向拖拽排序</title>
 <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> 
 <style type="text/css">
  body, p {
   padding: 0px;
   margin: 0px;
  }
  .box {
   position: relative;
   margin-left: 15px;
   padding: 10px;
   padding-right: 0px;
   width: 810px;
   border: blue solid 1px;
  }
  .box ul{
   list-style: none;
   overflow: hidden;
   padding: 0;
   margin:0;
  }
  .drag {
   float: left;
   border: #000 solid 1px;
   text-align: center;
  }
  .box ul li a{
   display: block;
   padding: 10px 25px;
  }
  .drag-dash {
   position: absolute;
   border: #000 solid 1px;
   background: #ececec;
  }
  .dash {
   float: left;
   border: 1px solid transparent;
  }
 </style>
</head>
<body>
<h1>p横向拖拽排序</h1>
<p class="box">
 <ul>
  <li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航一</a></li>
  <li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航二导航</a></li>
  <li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航导航导航三</a></li>
  <li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航导航四</a></li>
  <li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导五</a></li>
 </ul>
</p>
<script type="text/javascript">
 $(document).ready(function () {
  var range = {x: 0, y: 0};//鼠标元素偏移量
  var lastPos = {x: 0, y: 0, x1: 0, y1: 0}; //拖拽对象的四个坐标
  var tarPos = {x: 0, y: 0, x1: 0, y1: 0}; //目标元素对象的坐标初始化
  var thep = null, move = false;
  var choose = false; //拖拽对象 拖拽状态 选中状态
  var thepId = 0, thepHeight = 0, thepHalf = 0;
  var tarFirstY = 0; //拖拽对象的索引、高度、的初始化。
  var tarp = null, tarFirst, tempp; //要插入的目标元素的对象, 临时的虚线对象
  var initPos = {x: 0, y: 0};
  var thepWidth;//拖拽对象的宽度
  $(".drag").each(function () {
   $(this).mousedown(function (event) {
    choose = true;
    //拖拽对象
    thep = $(this);
    //记录拖拽元素初始位置
    initPos.x = thep.position().left;
    initPos.y = thep.position().top;
    //鼠标元素相对偏移量
    range.x = event.pageX - thep.position().left;
    range.y = event.pageY - thep.position().top;
    thepId = thep.index();
    thepWidth = thep.width();
    thepHalf = thepWidth / 2;
    thep.removeClass("drag");
    thep.addClass("drag-dash");
    thep.css({left: initPos.x + &#39;px&#39;, top: initPos.y + &#39;px&#39;});
    // 创建新元素 插入拖拽元素之前的位置(虚线框)
    $("<p class=&#39;dash&#39;></p>").insertBefore(thep);
    tempp = $(".dash");
    $(".dash").css("width" , thepWidth);
    return false
   });
  });
  $(document).mouseup(function (event) {
   if (!choose) {
    return false;
   }
   if (!move) {
    //恢复对象的初始样式
    thep.removeClass("drag-dash");
    thep.addClass("drag");
    tempp.remove(); // 删除新建的虚线p
    choose = false;
    return false;
   }
   thep.insertBefore(tempp); // 拖拽元素插入到 虚线p的位置上
   //恢复对象的初始样式
   thep.removeClass("drag-dash");
   thep.addClass("drag");
   tempp.remove(); // 删除新建的虚线p
   move = false;
   choose = false;
   return false
  }).mousemove(function (event) {
   if (!choose) {return false}
   move = true;
   lastPos.x = event.pageX - range.x;
   lastPos.y = event.pageY - range.y;
   lastPos.x1 = lastPos.x + thepWidth;
   // 拖拽元素随鼠标移动
   thep.css({left: lastPos.x + &#39;px&#39;, top: lastPos.y + &#39;px&#39;});
   // 拖拽元素随鼠标移动 查找插入目标元素
   var $main = $(&#39;.drag&#39;); // 局部变量：按照重新排列过的顺序 再次获取 各个元素的坐标，
   $main.each(function () {
    tarp = $(this);
    tarPos.x = tarp.position().left;
    tarPos.y = tarp.position().top;
    tarPos.x1 = tarPos.x + tarp.width() / 2;
    tarFirst = $main.eq(0); // 获得第一个元素\
    tarFirstX = tarFirst.position().left + thepHalf; // 第一个元素对象的中心纵坐标
    //拖拽对象 移动到第一个位置
    if (lastPos.x <= tarFirstX) {
     tempp.insertBefore(tarFirst);
    }
    //判断要插入目标元素的 坐标后， 直接插入
    if (lastPos.x >= tarPos.x - thepHalf && lastPos.x1 >= tarPos.x1) {
     tempp.insertAfter(tarp);
    }
   });
   return false
  });
 });
</script>
</body>
</html>

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