App.xaml.cs

using H.NotifyIcon;

using Microsoft.Toolkit.Uwp.Notifications;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Input;

// To learn more about WinUI, the WinUI project structure,
// and more about our project templates, see: http://aka.ms/winui-project-info.

namespace FruitToolbox
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    public sealed partial class App: Application
    {
        #region Properties

        public static TaskbarIcon TrayIcon { get; private set; }
        private static Settings.View SettingsWindow = null;

        #endregion

        #region Constructors

        /// <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()
        {
            InitializeComponent();
        }

        #endregion

        #region Event Handlers

        /// <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="args">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            InitializeFunction();
            InitializeTrayIcon();
        }

        private void InitializeTrayIcon()
        {
            var OpenSettingsCommand = (XamlUICommand)Resources["OpenSettingsCommand"];
            OpenSettingsCommand.ExecuteRequested += OpenSettingsCommand_ExecuteRequested;

            var ExitApplicationCommand = (XamlUICommand)Resources["ExitApplicationCommand"];
            ExitApplicationCommand.ExecuteRequested += ExitApplicationCommand_ExecuteRequested;

            TrayIcon = (TaskbarIcon)Resources["TrayIcon"];
            TrayIcon.ForceCreate();
        }

        private static void InitializeFunction()
        {
            if(!LanguageSwitcher.Core.Start())
            {
                Settings.Core.LanguageSwitcherEnabled = false;
                new ToastContentBuilder()
                    .AddText("Unable to enable language switcher")
                    .AddText("Please make sure you have both keyboard languages and IME languages installed")
                    .Show();
            }

            Hotkey.Core.Start();
            Hotkey.Core.CapsLockSwitchLanguageEvent += LanguageSwitcher.Core.SwapCategoryNoReturn;
            Hotkey.Core.LanguageChangeEvent += LanguageSwitcher.Core.UpdateInputLanguageByKeyboard;
            Hotkey.Core.RAltUpEvent += LanguageSwitcher.Core.OnRaltUp;

        }

        private void OpenSettingsCommand_ExecuteRequested(object _, ExecuteRequestedEventArgs args)
        {
            if(SettingsWindow == null)
            {
                SettingsWindow = new();
                SettingsWindow.Closed += (e, s) => SettingsWindow = null;
            }

            SettingsWindow.Activate();
        }

        private void ExitApplicationCommand_ExecuteRequested(object _, ExecuteRequestedEventArgs args)
        {
            LanguageSwitcher.Core.Stop();
            TrayIcon?.Dispose();
            Environment.Exit(0);
        }

        #endregion
    }
}