title: GWT : Celltable Multiselection , MouseDown event?
body: <p>I've got a CellTable, which has 4 columns:</p>
  
  <pre><code>| Column 1 | Column 2 | Column 3 | Column 4 |
  </code></pre>
  
  <p>Goal:</p>
  
  <p>User can select multiple columns while holding mouse button down and hovering over the columns.</p>
  
  <p>e.g User clicks on column 1 and holds the mouse button down, moves over column 2 and 3 resulting in column 2 and 3 being selected.</p>
  
  <p>I tried:</p>
  
  <pre><code>final MultiSelectionModel&lt;data&gt; selectionModel = new MultiSelectionModel&lt;BestellungData&gt;();
      cellTable.setSelectionModel(selectionModel);
  
      cellTable.addCellPreviewHandler(new Handler&lt;data&gt;()
              {
  
                  @Override
                  public void onCellPreview(
                          CellPreviewEvent&lt;data&gt; event) {
                      // TODO Auto-generated method stub
                      if ("click".equals(event.getNativeEvent().getType())) {
  
                          selectionModel.setSelected(event.getValue(), true);
  
                      }
                  }
  
  
      });
  </code></pre>
  
  <p>However it doesn't work.</p>