// Startup ############################################################
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used such as when the application is launched to open a specific file.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
protected override async void OnLaunched(LaunchActivatedEventArgs e)
{
#if DEBUG
if (System.Diagnostics.Debugger.IsAttached)
{
this.DebugSettings.EnableFrameRateCounter = true;
}
#endif
try
{
AppModel.Instance.MainObject = await AppModelIO.LoadGame();
}
catch (Exception)
{
AppModel.Instance.MainObject = new Game();
}
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (!(Window.Current.Content is Frame rootFrame))
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
rootFrame.NavigationFailed += OnNavigationFailed;
rootFrame.Navigated += OnNavigated;
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
// Register a handler for BackRequested events and set the
// visibility of the Back button
SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
rootFrame.CanGoBack ?
AppViewBackButtonVisibility.Visible :
AppViewBackButtonVisibility.Collapsed;
}
if (e.PrelaunchActivated == false)
{
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
rootFrame.Navigate(typeof(Pages.MainPage));
}
// Ensure the current window is active
Window.Current.Activate();
}
}
// Exception Handling #################################################
async void App_UnhandledExceptionAsync(object sender, Windows.UI.Xaml.UnhandledExceptionEventArgs e)
{
e.Handled = true;
await AppModelIO.SaveGame();
AppModel.Instance.lstNotifications.Add(new Notification(("Notification_Error_Unknown"), e.Exception));
Current.Exit();
}
// ShutDown ###########################################################
/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
private async void OnSuspending(object sender, SuspendingEventArgs e)
{
var deferral = e.SuspendingOperation.GetDeferral();
try
{
await AppModelIO.SaveGame();
}
catch (Exception)
{
}
//TODO: Save application state and stop any background activity
deferral.Complete();
}
