// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // using System; using Windows.ApplicationModel; using Windows.ApplicationModel.Activation; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Navigation; namespace TdApp { /// <summary> /// Provides application-specific behavior to supplement the default Application class. /// </summary> sealed partial class App : Application { /// <summary> /// Initializes the singleton application object. This is the first line of authored code /// executed, and as such is the logical equivalent of main() or WinMain(). /// </summary> public App() { Microsoft.ApplicationInsights.WindowsAppInitializer.InitializeAsync( Microsoft.ApplicationInsights.WindowsCollectors.Metadata | Microsoft.ApplicationInsights.WindowsCollectors.Session); this.InitializeComponent(); this.Suspending += OnSuspending; } /// <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 void OnLaunched(LaunchActivatedEventArgs e) { #if DEBUG if (System.Diagnostics.Debugger.IsAttached) { this.DebugSettings.EnableFrameRateCounter = true; } #endif Frame rootFrame = Window.Current.Content as Frame; // Do not repeat app initialization when the Window already has content, // just ensure that the window is active if (rootFrame == null) { // Create a Frame to act as the navigation context and navigate to the first page rootFrame = new Frame(); rootFrame.NavigationFailed += OnNavigationFailed; if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) { //TODO: Load state from previously suspended application } // Place the frame in the current Window Window.Current.Content = rootFrame; } 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(MainPage), e.Arguments); } // Ensure the current window is active Window.Current.Activate(); } /// <summary> /// Invoked when Navigation to a certain page fails /// </summary> /// <param name="sender">The Frame which failed navigation</param> /// <param name="e">Details about the navigation failure</param> void OnNavigationFailed(object sender, NavigationFailedEventArgs e) { throw new Exception("Failed to load Page " + e.SourcePageType.FullName); } /// <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 void OnSuspending(object sender, SuspendingEventArgs e) { var deferral = e.SuspendingOperation.GetDeferral(); //TODO: Save application state and stop any background activity deferral.Complete(); } } }