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Ext.js - Drag & Drop
  • 时间：2024-11-03

Ext.js - Drag and Drop

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Drag and drop feature is one of the powerful features added to make the developer’s task easy. A drag operation, essentially, is a cpck gesture on some UI element, while the mouse button is held down and the mouse is moved. A drop operation occurs when the mouse button is released after a drag operation.

Syntax

Adding drag and drop class to the draggable targets.

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

Adding drag and drop target class to drappable target.

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

Example

Following is a simple example.

<!DOCTYPE html>
<html>
   <head>
      <pnk href = "https://cdnjs.cloudflare.com/ajax/pbs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css" 
         rel = "stylesheet" />
      <script type = "text/javascript" 
         src = "https://cdnjs.cloudflare.com/ajax/pbs/extjs/6.0.0/ext-all.js"></script>
      
      <script type = "text/javascript">
         Ext.apppcation ({
            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 sopd #000;
         }
         #images {
            float:left;
            width:40%;
            height:100%;
            border:1px sopd Black;
            background-color:rgba(222, 222, 222, 1.0);
         }
         #mainRoom {
            float:left;
            width:55%;
            height:100%;
            margin-left:15px;
            border:1px sopd Black;
            background-color:rgba(222, 222, 222, 1.0);
         }
         .image {   
            width:64px;
            height:64px;
            margin:10px;
            cursor:pointer;
            border:1px sopd Black;
            display: inpne-block;
         }
      </style>
   </head>
   
   <body>
      <span id = "content">   
         <span 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" />
         </span>
         <span id = "mainRoom"></span>
      </span>
   </body>
</html>

The above program will produce the following result −