title: Double Click event for DataGrid
body: <p>I added double click event for DataGrid, but it doesn't work correctly. The code handles a single click, but it does <em>not</em> handle double click.</p>
  
  <p>Please help.</p>
  
  <pre><code>private DataGrid&lt;Contract&gt; table = new DataGrid&lt;Contract&gt;();
  table.addCellPreviewHandler(new Handler&lt;Contract&gt;() {
    @Override
    public void onCellPreview(final CellPreviewEvent&lt;Contract&gt; event) {
      if (BrowserEvents.DBLCLICK.equals(event.getNativeEvent().getType())) {
        //it doesn't handle
        Window.alert("Tro-lo-lo");
      }
      if (BrowserEvents.CLICK.equals(event.getNativeEvent().getType())) {
        //it handles
        Window.alert("Tru-la-la");        
      }
    }
  });
  </code></pre>