title: DataGridCell.IsEditMode?
body: <p>How Can I know if the DataGridCell is currently in edit mode (not IsSelected), I mean, for example a DataGridTextColumn cell is clicked it becomes a TextBox and not a TextBlock, that's what I call IsEditMode.
  I wanna set a trigger-setter for this mode.</p>
  
  <p><strong>EDIT:</strong>
  I tried to set a general style for DataGridCell.IsEditing but it doesn't seem to do anything.</p>
  
  <p>Here is a snippet of my current code:</p>
  
  <pre><code>&lt;Style TargetType="{x:Type tk:DataGridCell}"&gt;
      &lt;Style.Triggers&gt;
          &lt;Trigger Property="IsSelected" Value="True"&gt;
              &lt;Setter Property="Background" Value="{x:Null}"/&gt;
          &lt;/Trigger&gt;
          &lt;Trigger Property="IsEditing" Value="True"&gt;
              &lt;Setter Property="BorderBrush" Value="#FF62B6CC"/&gt;
              &lt;Setter Property="Background" Value="#FFF4F4F4"/&gt;
          &lt;/Trigger&gt;
      &lt;/Style.Triggers&gt;
      &lt;Setter Property="Foreground" Value="Black"/&gt;
      &lt;Setter Property="BorderThickness" Value="0"/&gt;
      &lt;Setter Property="BorderThickness" Value="0.5"/&gt;
      &lt;Setter Property="BorderBrush" Value="{x:Null}"/&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>Thanks.</p>