> Ext.js中文手册 > Ext.js 拖放

描述

拖放功能是为使开发人员轻松工作而添加的强大功能之一。拖动操作基本上是在某些UI元素上的点击手势,同时按住鼠标按钮并移动鼠标。 在拖动操作后释放鼠标按钮时,会发生放置操作。

语法

将类拖放到可拖动目标。

   var dd = Ext.create('Ext.dd.DD', el, 'imagesDDGroup', {
       isTarget: false
   });

添加拖放目标类到drappable目标

   var mainTarget = Ext.create('Ext.dd.DDTarget', 'mainRoom', 'imagesDDGroup', {
      ignoreSelf: false
   });

例子

下面是一个简单的例子

<!DOCTYPE HTML>
<html>
<head>
   <link href="https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="/attachements/w3c/ext-all.js"></script>
   <script type="text/javascript">
      Ext.application({
          launch: function() {
              var images = Ext.get('images').select('img');
              Ext.each(images.elements, function(el) {
                  var dd = Ext.create('Ext.dd.DD', el, 'imagesDDGroup', {
                      isTarget: false
                  });
              });
          }
       }); 
      var mainTarget = Ext.create('Ext.dd.DDTarget', 'mainRoom', 'imagesDDGroup', {
         ignoreSelf: false
      });
   </script>
   <style>
      #content{
         width:600px;
         height:400px;
         padding:10px;
         border:1px solid #000;
      }
      #images{
         float:left;
         width:40%;
         height:100%;
         border:1px solid Black;
         background-color:rgba(222, 222, 222, 1.0);
      }
      #mainRoom{
         float:left;
         width:55%;
         height:100%;
         margin-left:15px;
         border:1px solid Black;
         background-color:rgba(222, 222, 222, 1.0);
      }
      .image{   
         width:64px;
         height:64px;
         margin:10px;
         cursor:pointer;
         border:1px solid Black;
         display: inline-block;
      }
   </style>
</head>
<body>
   <div id="content">   
      <div id="images"> 
         <img src = "/extjs/images/1.jpg" class = "image" />
         <img src = "/extjs/images/2.jpg" class = "image" />
         <img src = "/extjs/images/3.jpg" class = "image" />
         <img src = "/extjs/images/4.jpg" class = "image" />
         <img src = "/extjs/images/5.jpg" class = "image" />
         <img src = "/extjs/images/6.jpg" class = "image" />
         <img src = "/extjs/images/7.jpg" class = "image" />
         <img src = "/extjs/images/8.jpg" class = "image" />
      </div>
      <div id="mainRoom"></div>
   </div>
</body>
</html>

这将产生以下结果:

在Extjs的拖放的帮助下,我们可以将数据从网格移动到网格和网格到窗体。下面是在网格和窗体之间移动数据的例子。

Ext.js 网格到网格拖放
Ext.js 网格到表单拖放

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