title: DevExpress GridControl cell enabling/disabling
body: <p>I have a grid control where some columns are editable, some are not.</p>
  
  <p>I'd like to have more fine control, so that <strong>depending on some other fields of <code>MyData</code>, the corresponding cells will be enabled or not</strong>.</p>
  
  <pre><code>    &lt;dxg:GridControl ItemsSource="{Binding MyData}" AutoPopulateColumns="True"&gt;
              &lt;dxg:GridControl.Columns&gt;
                  &lt;dxg:GridColumn Header="Name" ReadOnly="True"/&gt;
                  &lt;dxg:GridColumn Header="ID 1" ReadOnly="False"/&gt;
                  &lt;dxg:GridColumn Header="ID 2" ReadOnly="False"/&gt;
                  &lt;dxg:GridColumn Header="ID 3" ReadOnly="False"/&gt;
          &lt;/dxg:GridControl.Columns&gt;
     &lt;/dxg:GridControl&gt;
  </code></pre>
  
  <p>Can't find anything on the DevExpress support site yet. Would you please have any idea?</p>
  
  <p>Thank you!</p>