How do I determine inactivity in a MVVM application?

Posted by Jordan on Stack Overflow See other posts from Stack Overflow or by Jordan
Published on 2011-02-01T16:46:29Z Indexed on 2011/02/02 15:25 UTC
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wpf

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mvvm

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event-hooking

I have an MVVM kiosk application that I need to restart when it has been inactive for a set amount of time. I'm using Prism and Unity to facilitate the MVVM pattern. I've got the restarting down and I even know how to handle the timer. What I want to know is how to know when activity, that is any mouse event, has taken occurred. The only way I know how to do that is by subscribing to the preview mouse events of the main window. That breaks MVVM thought, doesn't it?

I've thought about exposing my window as an interface that exposes those events to my application, but that would require that the window implement that interface which also seems to break MVVM.

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