react-native-view-shot/example/windows/ViewShotExample/App.xaml.cs

using ReactNative;
using ReactNative.Modules.Launch;
using System;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

namespace ViewShotExample
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application
    {
        private readonly ReactPage _reactPage;

        /// <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()
        {
            this.InitializeComponent();
            this.Suspending += OnSuspending;
            this.Resuming += OnResuming;

            _reactPage = new MainPage();
        }

        /// <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)
        {
            base.OnLaunched(e);
            OnCreate(e.Arguments);
        }

        /// <summary>
        /// Invoked when the application is activated.
        /// </summary>
        /// <param name="args">The activated event arguments.</param>
        protected override void OnActivated(IActivatedEventArgs args)
        {
            base.OnActivated(args);

            switch (args.Kind)
            {
                case ActivationKind.Protocol:
                case ActivationKind.ProtocolForResults:
                    var protocolArgs = (IProtocolActivatedEventArgs)args;
                    LauncherModule.SetActivatedUrl(protocolArgs.Uri.AbsoluteUri);
                    break;
            }

            if (args.PreviousExecutionState != ApplicationExecutionState.Running &&
                args.PreviousExecutionState != ApplicationExecutionState.Suspended)
            {
                OnCreate(null);
            }
        }

        /// <summary>
        /// Called whenever the app is opened to initia
        /// </summary>
        /// <param name="arguments"></param>
        private void OnCreate(string arguments)
        {
            _reactPage.OnResume(Exit);

#if DEBUG
            if (System.Diagnostics.Debugger.IsAttached)
            {
                this.DebugSettings.EnableFrameRateCounter = true;
            }

            SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
                AppViewBackButtonVisibility.Visible;
#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)
            {
                _reactPage.OnCreate(arguments);

                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();

                rootFrame.NavigationFailed += OnNavigationFailed;

                // 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.Content = _reactPage;
            }

            // 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>
        private 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)
        {
            _reactPage.OnSuspend();
        }

        /// <summary>
        /// Invoked when application execution is being resumed.
        /// </summary>
        /// <param name="sender">The source of the resume request.</param>
        /// <param name="e">Details about the resume request.</param>
        private void OnResuming(object sender, object e)
        {
            _reactPage.OnResume(Exit);
        }
    }
}