GetLastInputInfo isn't supported for Windows store apps:
Minimum supported client: Windows 2000 Professional [desktop apps only]
I'm not aware of any intrinsic UWP API to detect if the user is idle, but it's definitely possible to whip up your own mechanism for doing so.
I couldn't figure out a way to check user input on a UWP without having to individually check PointerPressed, PointerExited, etc.
What's so bad about that approach? Here's my attempt:
App.xaml.cs
public sealed partial class App : Application
{
public static new App Current => (App)Application.Current;
public event EventHandler IsIdleChanged;
private DispatcherTimer idleTimer;
private bool isIdle;
public bool IsIdle
{
get
{
return isIdle;
}
private set
{
if (isIdle != value)
{
isIdle = value;
IsIdleChanged?.Invoke(this, EventArgs.Empty);
}
}
}
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
idleTimer = new DispatcherTimer();
idleTimer.Interval = TimeSpan.FromSeconds(10); // 10s idle delay
idleTimer.Tick += onIdleTimerTick;
Window.Current.CoreWindow.PointerMoved += onCoreWindowPointerMoved;
}
private void onIdleTimerTick(object sender, object e)
{
idleTimer.Stop();
IsIdle = true;
}
private void onCoreWindowPointerMoved(CoreWindow sender, PointerEventArgs args)
{
idleTimer.Stop();
idleTimer.Start();
IsIdle = false;
}
}
MainPage.xaml.cs
public sealed partial class MainPage : Page
{
protected override void OnNavigatedTo(NavigationEventArgs e)
{
App.Current.IsIdleChanged += onIsIdleChanged;
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
App.Current.IsIdleChanged -= onIsIdleChanged;
}
private void onIsIdleChanged(object sender, EventArgs e)
{
System.Diagnostics.Debug.WriteLine($"IsIdle: {App.Current.IsIdle}");
}
}
Idle is detected when the pointer hasn't moved for 10s within the app window. This will work also for touch-only apps (like mobile apps) because PointerMoved will fire when the window is tapped, too.
