title: Place a button in JFace tableviewer column
body: <p>I'm working on Eclipse RCP Viewer framework, i have a requirement to place a button widget in column of <code>TableViewer</code>.
  I have been following the  <a href="http://www.vogella.com/articles/EclipseJFaceTable/article.html" rel="nofollow">tutorials</a> to develop my application</p>
  
  <p>I don't find any widget inside the tableviewer, as in the example it was just an image, is it possible to place a widget, any idea please suggest me.</p>
  
  <p>I've searched API to find any predefined method like <code>getWidget()</code> similar to <code>getImage()</code> ,that can be placed in <code>col.setLabelProvider()</code>, but there was none actually,How can i do this</p>