Silverlight Scrollviewer With Only Buttons

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<Canvas x:Name="root">
  <Button x:Name="left" Content="<"/>
  <Button x:Name="right" Content=">"/>
  <ScrollViewer x:Name="viewer" BorderThickness="0" VerticalScrollBarVisibility="Hidden">
    <ContentPresenter />
  </ScrollViewer>
</Canvas>

public override void OnApplyTemplate()
{
  base.OnApplyTemplate();

  left = GetTemplateChild("left") as Button;
  left.Click += new RoutedEvent(YourHandler);
  right = GetTemplateChild("right") as Button;
  right.Click += new RoutedEvent(YourHandler);
  // position your scroll buttons here, not writing that code
  scroll = GetTemplateChild("viewer") as ScrollViewer;
  root = GetTemplateChild("root") as Canvas;

  var fe = this.Content as FrameworkElement;
  if (fe != null)
  {
    fe.SizeChanged += new SizeChangedEventHandler(fe_SizeChanged);
  }
}

void  fe_SizeChanged(object sender, SizeChangedEventArgs e)
{
  this.InvalidateMeasure();
}

protected override Size ArrangeOverride(Size finalSize)
{
  if (!double.IsInfinity(scroll.ViewportHeight))
  {
     left.Visibility = (scroll.HorizontalOffset > 0);
     right.Visibility = (scroll.HorizontalOffset < ScrollableHeight);
  }
  return base.ArrangeOverride(finalSize);
}

protected override Size MeasureOverride(Size availableSize)
{
  scroll.Measure(availableSize);
  return scroll.DesiredSize;
}

<ControlTemplate TargetType="{x:Type ScrollViewer}" x:Key="ButtonOnlyScrollViewer">
        <ControlTemplate.Resources>
            <!-- Add style here for repeat button seen below -->
        </ControlTemplate.Resources>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <RepeatButton Grid.Row="0"
                          Foreground="White"
                          Background="Yellow"
                          HorizontalAlignment="Stretch"
                          Command="ScrollBar.PageUpCommand"
                          Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}">
            </RepeatButton>

            <ScrollContentPresenter
                CanContentScroll="{TemplateBinding CanContentScroll}"
                Grid.Row="1"
                Content="{TemplateBinding Content}"
                Width="{TemplateBinding Width}"
                Height="{TemplateBinding Height}"
                Margin="{TemplateBinding Margin}"/>

            <RepeatButton Grid.Row="2" Background="Black" Foreground="White" Command="ScrollBar.PageDownCommand">
            </RepeatButton>
        </Grid>
    </ControlTemplate>