拖拽和选项 onDrag

描述

拖拽进行中时会调用此回调函数。

语法

new Draggable('element', {onDrag: 'effectFunction'});

其中 effectFunction 是函数，用于定义要应用的效果。

示例

在线演示

<html>
   <head>
      <title>Draggables Elements</title>
		
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      <script type = "text/javascript" src = "/javascript/scriptaculous.js"></script>
		
      <script type = "text/javascript">
         window.onload = function(){
            new Draggable(
               'myimage', { 
                  onDrag : function(){
                     new Effect.Opacity('myimage', {from:0, to:1.0, duration:1});
                  }
               }
            );
         }
      </script>
   </head>

   <body>
      <p>While you drag this image it become disappear.</p>
      <img id = "myimage" src = "/images/scriptaculous.gif"/>
   </body>
</html>

将生成以下结果 −

scriptaculous_drag_drop.htm

打印页面

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