PeerConnectiveChat/PCC.Gui/Gui/PccMainForm.cs

using Microsoft.AspNetCore.Components.WebView;
using Microsoft.AspNetCore.Components.WebView.WindowsForms;
using PCC.AppScaffold;
using PCC.Common.EventBus;
using PCC.Common.Logging;

namespace PCC.Gui
{
    public partial class PccMainForm : Form
    {
        private IEventBus _eventBus;
        private bool _isShuttingDown = false;

        public PccMainForm()
        {
            InitializeComponent();
        }

        private async void PccMainForm_Shown(object sender, EventArgs e)
        {
            ApplicationInitializationStatusLabel.Text = "Building host...";
            Application.DoEvents();
            HostHolder.BuildHost();

            _eventBus = HostHolder.EventBus;

            void UseEvh(UiShownEvent obj)
            {
                ApplicationInitializationPanel.Hide();
                _eventBus.UnSubscript<UiShownEvent>(UseEvh);
#if DEBUG
                MainBlazorWebView.WebView.CoreWebView2.OpenDevToolsWindow();
#endif
            }
            _eventBus.Subscript((Action<UiShownEvent>)UseEvh);

            async void LocalMethod(LoggingEvent le)
            {
                if (ApplicationInitializationPanel.Visible == false) return;
                ApplicationInitializationStatusLabel.Text = $"{le.LogLevel} {le.Content}";
                Application.DoEvents();
            }

            HostHolder.EventBus.Subscript<LoggingEvent>(LocalMethod);

            ApplicationInitializationStatusLabel.Text = "Starting host...";
            Application.DoEvents();
            await HostHolder.StartAsync();

            void OnUrlLoading(object? o, UrlLoadingEventArgs args)
            {
                MainBlazorWebView.UrlLoading -= OnUrlLoading;

                ApplicationInitializationStatusLabel.Text = "Loading UI...";
                Application.DoEvents();
            }

            MainBlazorWebView.UrlLoading += OnUrlLoading;

            MainBlazorWebView.HostPage = "wwwroot\\index-mud-ise.html";
            MainBlazorWebView.Services = HostHolder.ServiceProvider;
            MainBlazorWebView.RootComponents.Add<MudIse.MainMudIse>("#app");
        }

        private void PccMainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (_isShuttingDown) return;
            _isShuttingDown = true;

            ApplicationInitializationPanel.Show();
            ApplicationInitializationTitleLabel.Text = "Application shutting down...";
            Application.DoEvents();
            HostHolder.StopAsync().Wait();

            ApplicationInitializationStatusLabel.Text = "Window will close after 3 second...";
            Application.DoEvents();
            Task.Delay(3000).Wait();
        }
    }
}