The Media Center Sandbox

I have a panel with a set of buttons, it responds as expected to the up and down keys but I also want it to respond to Page Up and Page Down keys as well.

<Panel Navigation="ContainAll">
<Layout>
<FlowLayout Orientation="Vertical" ItemAlignment="Near"/>
</Layout>
<Children>
<me:buttonImage Command="[CmdPlayAll]" Name="cmdPlay" />
<me:buttonImage Command="[CmdAddToQueue]" Name="cmdQueue" />
<me:buttonImage Command="[CmdShuffle]" Name="cmdShuffle" />
<me:buttonImage Command="[CmdResume]" Name="cmdResume"/>
<me:buttonImage Command="[CmdPause]" Name="cmdPause" />
<me:buttonImage Command="[CmdClose]" Name="cmdClose" />
</Children>
</Panel>

I've tried a shortcut handler for the keys and then this:

<Changed Source="[CmdPgUp.Invoked]">
<Actions>
<Invoke Target="[cmdPlay.NavigateInto]"/>
</Actions>
</Changed>

but nothing happens. NavigateIntoIndex, Home, Scroll all fail to compile as it's not a valid for a Panel. Am I missing a command or method that would allow me to do this.

If you put the items into a repeater and put that inside a scroller (even if they aren't scrolling), then you can wire up the keys correctly in the same way as the "ScrollingData - Repeater" samples in the SDK.

Cheers,
Andrew

Thanks Andy, if I do that I appear to lose the ability to hide specific buttons (e.g. if nothing is playing then the "Pause" button would be hidden). I could do this if I put that logic into the building of the button list or built a ModelItem to sit behind them to fire a trigger for the Visible attribute to change. I was thinking there must be a simpler way to get either automatically handle PageUp and PageDown or for me to set focus to a specific control within MCML.