title: UploadItem: How to get event when file is successfully Uploaded?
body: <p>I'm new to SmartGWT. I'm using SmartGWT(LGPL) 2.2 with FF 3.6.
  I've done the file upload module in my GWT-Ext project successfully. In that I was using a <strong>FormPanel</strong> &amp; a <strong>FileUpload</strong> control. After the file is uploaded I handled the event like this:</p>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>formPanel.addFormListener(new FormListenerAdapter(){
  
     @Override
     public void onActionComplete(Form form, int httpStatus,
       String responseText) {
      MessageBox.alert("Succesful");
     }
     @Override
     public void onActionFailed(Form form, int httpStatus,
       String responseText) {
      MessageBox.alert("Failed");
     }
  
    });
  </code></pre>
  
  <p>I used Struts to send request to my Action Class &amp; redirect it back to the listener like this:</p>
  
  <p><strong>Code:</strong></p>
  
  <pre><code> &lt;package name="default" extends="struts-default"&gt;
    &lt;action name="FileUploadAction" class="com.nextenders.server.actions.FileUploadAction" &gt;
      &lt;result name="success" type="redirect"&gt;SUCCESS&lt;/result&gt;
     &lt;result name="fail"&gt;FAIL&lt;/result&gt;
     &lt;result name="none"&gt;NONE&lt;/result&gt;
     &lt;result name="blank"&gt;BLANK&lt;/result&gt;
     &lt;result name="size"&gt;SIZE&lt;/result&gt;
    &lt;/action&gt;
   &lt;/package&gt;
  </code></pre>
  
  <p>I'm using <strong>DynamicForm</strong> and <strong>UploadItem</strong> of SmartGWT.
  can anyone tell me if there is a similar functionality like <code>formPanel.addFormListener()</code> in <strong>DynamicForm</strong> of SmartGWT?</p>