105 lines
4.1 KiB
C#
105 lines
4.1 KiB
C#
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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using System;
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using Windows.ApplicationModel;
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using Windows.ApplicationModel.Activation;
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using Windows.UI.Xaml;
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using Windows.UI.Xaml.Controls;
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using Windows.UI.Xaml.Navigation;
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namespace TdApp
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{
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/// <summary>
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/// Provides application-specific behavior to supplement the default Application class.
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/// </summary>
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sealed partial class App : Application
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{
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/// <summary>
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/// Initializes the singleton application object. This is the first line of authored code
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/// executed, and as such is the logical equivalent of main() or WinMain().
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/// </summary>
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public App()
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{
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Microsoft.ApplicationInsights.WindowsAppInitializer.InitializeAsync(
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Microsoft.ApplicationInsights.WindowsCollectors.Metadata |
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Microsoft.ApplicationInsights.WindowsCollectors.Session);
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this.InitializeComponent();
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this.Suspending += OnSuspending;
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}
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/// <summary>
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/// Invoked when the application is launched normally by the end user. Other entry points
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/// will be used such as when the application is launched to open a specific file.
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/// </summary>
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/// <param name="e">Details about the launch request and process.</param>
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protected override void OnLaunched(LaunchActivatedEventArgs e)
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{
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#if DEBUG
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if (System.Diagnostics.Debugger.IsAttached)
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{
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this.DebugSettings.EnableFrameRateCounter = true;
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}
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#endif
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Frame rootFrame = Window.Current.Content as Frame;
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// Do not repeat app initialization when the Window already has content,
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// just ensure that the window is active
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if (rootFrame == null)
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{
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// Create a Frame to act as the navigation context and navigate to the first page
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rootFrame = new Frame();
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rootFrame.NavigationFailed += OnNavigationFailed;
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if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
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{
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//TODO: Load state from previously suspended application
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}
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// Place the frame in the current Window
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Window.Current.Content = rootFrame;
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}
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if (rootFrame.Content == null)
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{
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// When the navigation stack isn't restored navigate to the first page,
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// configuring the new page by passing required information as a navigation
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// parameter
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rootFrame.Navigate(typeof(MainPage), e.Arguments);
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}
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// Ensure the current window is active
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Window.Current.Activate();
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}
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/// <summary>
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/// Invoked when Navigation to a certain page fails
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/// </summary>
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/// <param name="sender">The Frame which failed navigation</param>
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/// <param name="e">Details about the navigation failure</param>
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void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
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{
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throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
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}
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/// <summary>
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/// Invoked when application execution is being suspended. Application state is saved
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/// without knowing whether the application will be terminated or resumed with the contents
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/// of memory still intact.
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/// </summary>
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/// <param name="sender">The source of the suspend request.</param>
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/// <param name="e">Details about the suspend request.</param>
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private void OnSuspending(object sender, SuspendingEventArgs e)
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{
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var deferral = e.SuspendingOperation.GetDeferral();
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//TODO: Save application state and stop any background activity
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deferral.Complete();
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}
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}
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}
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