WinRT timed logout

WinRT timed logout

I am developing a WinRT app. One of the requirements is that the app
should have a "timed logout" feature. What this means is that on any
screen, if the app has been idle for 10 mins, the app should logout and
navigate back to the home screen.
The brute force way of doing this obviously would be to hook up pointer
pressed events on every grid of every page and resetting the timer if any
of these events is fired but I was wondering if there was a more elegant
and more reliable way of doing this.
Thanks, Rajeev