An context sensitive icon with complex tooltip is displayed within xp:StackPanel, that contains l:InfoPopup, l:HyperLink and l:ObjectTypeIcon.

<ColStyle Name="T" Width="48" Height="0" SortName="Type">

  <CellTemplate>

    <xp:StackPanel VerticalAlignment="Top" Orientation="Horizontal" HorizontalAlignment="Center">

      <l:InfoPopup InfoId="{Binding Path=[folderObject.id]}" VerticalAlignment="Top" DirectoryStyleName="{Binding ObjectType.Name}">

        <l:Hyperlink NavigateUri="{Binding Path=[folderObject.id], Converter={StaticResource StringFormatValueConverter}, ConverterParameter=javascript:showDialog(\'do.ashx?cmd\=feed&amp;name\=Display&amp;ids\={0}\')}">

          <l:ObjectTypeIcon  ToolTip="Preview" MaxWidth="16" ObjectType="{Binding Path=ObjectType}" />

        </l:Hyperlink>

      </l:InfoPopup>

    </xp:StackPanel>

  </CellTemplate>

</ColStyle>