romrepomgr/RomRepoMgr/App.xaml.cs

/******************************************************************************
// RomRepoMgr - ROM repository manager
// ----------------------------------------------------------------------------
//
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2020-2021 Natalia Portillo
*******************************************************************************/

using System;
using System.Collections.Generic;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using RomRepoMgr.Core.EventArgs;
using RomRepoMgr.Core.Models;
using RomRepoMgr.ViewModels;
using RomRepoMgr.Views;

namespace RomRepoMgr
{
    public class App : Application
    {
        List<RomSetModel> _romSets;

        public override void Initialize() => AvaloniaXamlLoader.Load(this);

        public override void OnFrameworkInitializationCompleted()
        {
            if(ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
            {
                var splashWindow = new SplashWindow();
                var swvm         = new SplashWindowViewModel();
                swvm.WorkFinished        += OnSplashFinished;
                swvm.GotRomSets          += OnGotRomSets;
                splashWindow.DataContext =  swvm;
                desktop.MainWindow       =  splashWindow;
            }

            base.OnFrameworkInitializationCompleted();
        }

        void OnGotRomSets(object sender, RomSetsEventArgs e) => _romSets = e.RomSets;

        void OnSplashFinished(object sender, EventArgs e)
        {
            if(!(ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop))
                return;

            // Ensure not exit
            desktop.ShutdownMode = ShutdownMode.OnExplicitShutdown;

            // Close splash window
            desktop.MainWindow.Close();

            // Create and show main window
            desktop.MainWindow             = new MainWindow();
            desktop.MainWindow.DataContext = new MainWindowViewModel(desktop.MainWindow as MainWindow, _romSets);
            desktop.MainWindow.Show();

            // Now can close when all windows are closed
            desktop.ShutdownMode = ShutdownMode.OnLastWindowClose;
        }

        void OnAboutClicked(object sender, EventArgs args)
        {
            if(!(ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) ||
               !(desktop.MainWindow is MainWindow mainWindow)                            ||
               !(mainWindow.DataContext is MainWindowViewModel mainWindowViewModel))
                return;

            mainWindowViewModel.ExecuteAboutCommand();
        }

        void OnQuitClicked(object sender, EventArgs args)
        {
            if(!(ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) ||
               !(desktop.MainWindow is MainWindow mainWindow)                            ||
               !(mainWindow.DataContext is MainWindowViewModel mainWindowViewModel))
                return;

            mainWindowViewModel.ExecuteExitCommand();
        }

        void OnPreferencesClicked(object sender, EventArgs args)
        {
            if(!(ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) ||
               !(desktop.MainWindow is MainWindow mainWindow)                            ||
               !(mainWindow.DataContext is MainWindowViewModel mainWindowViewModel))
                return;

            mainWindowViewModel.ExecuteSettingsCommand();
        }
    }
}