Way of Binding: Linking scrolling

I had to do something to link two scrollviewers together. The use case for this is when you what to compare two things together (like diffing of objects).

To handle this the trick was to have a converter which multiplied -1 to the scrollers.


<ScrollViewer Grid.Column="0" Grid.Row="3" x:Name="leftScroller"
ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto" >
<ContentPresenter Content="{Binding SelectedMarketDataOne}"
ContentTemplateSelector="{StaticResource MarketDataTemplateSelector}">
<ContentPresenter.Style>
<Style TargetType="{x:Type ContentPresenter}">
<Setter Property="RenderTransform">
<Setter.Value>
<TransformGroup>
<TranslateTransform X="{Binding ElementName=rightScroller, Path=HorizontalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=-1}" />
<TranslateTransform Y="{Binding ElementName=rightScroller, Path=VerticalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=-1}" />
</TransformGroup>
</Setter.Value>
</Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=tbLink,Path=IsChecked}" Value="True">
<Setter Property="RenderTransform">
<Setter.Value>
<TransformGroup>
<TranslateTransform X="{Binding ElementName=rightScroller, Path=HorizontalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=0}" />
<TranslateTransform Y="{Binding ElementName=rightScroller, Path=VerticalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=0}" />
</TransformGroup>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentPresenter.Style>
</ContentPresenter>
</ScrollViewer>

<ScrollViewer Grid.Column="2" Grid.Row="3" x:Name="rightScroller"
ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto" >
<ContentPresenter Content="{Binding SelectedMarketDataTwo}"
ContentTemplateSelector="{StaticResource MarketDataTemplateSelector}">
<ContentPresenter.Style>
<Style TargetType="{x:Type ContentPresenter}">
<Setter Property="RenderTransform">
<Setter.Value>
<TransformGroup>
<TranslateTransform X="{Binding ElementName=leftScroller, Path=HorizontalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=-1}" />
<TranslateTransform Y="{Binding ElementName=leftScroller, Path=VerticalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=-1}" />
</TransformGroup>
</Setter.Value>
</Setter>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=tbLink,Path=IsChecked}" Value="True">
<Setter Property="RenderTransform">
<Setter.Value>
<TransformGroup>
<TranslateTransform X="{Binding ElementName=leftScroller, Path=HorizontalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=0}" />
<TranslateTransform Y="{Binding ElementName=leftScroller, Path=VerticalOffset, Converter={StaticResource MultiplyConverter}, ConverterParameter=0}" />
</TransformGroup>
</Setter.Value>
</Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</ContentPresenter.Style>
</ContentPresenter>
</ScrollViewer>