title: Custom Grid with Radio button extjs
body: <p>I want a custom grid, which contains a radio at the beginning of the column. Only one of the row in the grid can be selected ( that too by selecting the radio ).</p>
  
  <p>I used the following approach to achieve the above said,</p>
  
  <pre><code>renderer:functiom(val){
  return Ext.String.format("&lt;input type='radio' name='rowSel' value={0} /&gt;",val);
  }
  </code></pre>
  
  <p>Unlike Extjs radio, this is a html radio, which lacks richness, similarly i can't show validation error messages.</p>
  
  <p>Is there a possibility to achieve the above using extjs radio ?</p>