Vista - How to navigate through ListBox items via a style/template?

Hi,

I'm using a styled ListBox to present a list of records from a database.
I want the ListBox to display only one item at a time and provide 2
buttons for navigating through the items. Here's the [ugly but working]
style I have so far:

<Style x:Key="CategoryListStyle"
TargetType="{x:Type ListBox}"
>
<Setter Property="SelectionMode"
Value="Single" />

<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBox}">
<DockPanel>
<StackPanel DockPanel.Dock="Bottom"
Orientation="Horizontal"
HorizontalAlignment="Center"
>
<Button>Previous</Button>
<TextBlock Text="Category " />
<TextBlock Text="{Binding
Path=SelectedIndex,RelativeSource=/TemplatedParent}" />
<TextBlock Text=" of " />
<TextBlock Text="{Binding
Path=Items.Count,RelativeSource=/TemplatedParent}" />
<Button>Next</Button>
</StackPanel>

<ContentPresenter Content="{TemplateBinding
SelectedItem}"
ContentTemplate="{TemplateBinding
ItemTemplate}" />
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>


It works as expected, but I can't figure out how to hook my "Previous"
and "Next" buttons to the actions they are meant to perform (i.e.
increment/decrement the value of ListBox.SelectedIndex for the templated
ListBox).

I tried binding the buttons to commands from ComponentCommands
(MoveLeft,MoveDown, etc) but it did not work.

I also tried using EventTriggers within the ControlTemplate declaration
to animate the SelectedIndex property, but I could not find a way to
reference the "/TemplatedParent" in StoryBoard.TargetName property:

(for this, I added x:Name attributes to the button declarations in the
template above)

<ControlTemplate.Triggers>
<EventTrigger SourceName="PreviousButton"
RoutedEvent="Button.Click"
>
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<Int32Animation By="-1"
Duration="0:0:0"
FillBehavior ="HoldEnd"
Storyboard.TargetName="/TemplatedParent"

Storyboard.TargetProperty="SelectedIndex" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>

<EventTrigger SourceName="NextButton"
RoutedEvent="Button.Click"
>
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<Int32Animation By="1"
Duration="0:0:0"
FillBehavior ="HoldEnd"
Storyboard.TargetName="/TemplatedParent"

Storyboard.TargetProperty="SelectedIndex" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</ControlTemplate.Triggers>


Looking at the ListBox code via Reflector seem to indicate that item
navigation is hardwired in ListBox.OnKeyDown, so it seems that I would
have no choice but to derive from ListBox to achieve what I want...

Thoughts, suggestions?

Thanks!

Pascal