UWP: Detect app gaining/losing focus

Question

I want to be able to prevent the screen saver from triggering while my app is in use by using the DisplayRequest class, but I only want to do this while it\'s the active app

Answer 1

I use the visibility changed event on the home window. The event is not fired when opening or closing a new window within the app.

Window.Current.VisibilityChanged += OnVisibilityChanged;

/// 

/// When the window visibility changes, the stuff happens
/// 
/// object sender
/// VisibilityChangedEventArgs e
private void OnVisibilityChanged(object sender, VisibilityChangedEventArgs e)
{

    if (!e.Visible)
    {
       // do stuff
    }
    else
    {
       // do other stuff
    }
}