<StackPanel Orientation="Horizontal">
<Image Style="{StaticResource TreeViewIconStyle}" />
<TextBlock Style="{StaticResource TreeViewItemStyle}" Visibility="{Binding ElementName=DisplaySignatures, Path=IsChecked, Converter={StaticResource BoolToHiddenVisibility}}" />
<TextBlock Style="{StaticResource TreeViewItemStyleWithSignatures}" Visibility="{Binding ElementName=DisplaySignatures, Path=IsChecked, Converter={StaticResource BoolToVisibility}}" />
</StackPanel>