MARKUS

using Avalonia.Controls;

using Avalonia.Media.Imaging;

using Avalonia.Threading;

using System;

using System.Collections.Generic;

using System.Text;

using System.Threading;

using System.Windows;

namespace NetSparkleUpdater.UI.Avalonia.Controls

{

    public class BaseWindow : Window

    {

        protected bool _isOnMainThread;

        protected bool _hasInitiatedShutdown;

        protected CancellationTokenSource _cancellationTokenSource;

        public BaseWindow()

        {

            _cancellationTokenSource = new CancellationTokenSource();

            _hasInitiatedShutdown = false;

        }

        public BaseWindow(bool useClosingEvent)

        {

            if (useClosingEvent)

            {

                Closing += BaseWindow_Closing;

            }

            _cancellationTokenSource = new CancellationTokenSource();

            _hasInitiatedShutdown = false;

        }

        private void BaseWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)

        {

            Closing -= BaseWindow_Closing;

            if (!_isOnMainThread && !_hasInitiatedShutdown)

            {

                _hasInitiatedShutdown = true;

                _cancellationTokenSource.Cancel();

            }

        }

        protected void ShowWindow(bool isOnMainThread)

        {

            try

            {

                Show();

                _isOnMainThread = isOnMainThread;

                if (!isOnMainThread)

                {

                    Dispatcher.UIThread.MainLoop(_cancellationTokenSource.Token);

                }

            }

            catch (ThreadAbortException)

            {

                Close();

                if (!isOnMainThread)

                {

                    _cancellationTokenSource.Cancel();

                }

            }

        }

        protected void CloseWindow()

        {

            // make sure to close the window on the thread it has been started on

            Dispatcher.UIThread.InvokeAsync(() =>

            {

                Close();

                if (!_isOnMainThread && !_hasInitiatedShutdown)

                {

                    _hasInitiatedShutdown = true;

                    _cancellationTokenSource.Cancel();

                }

            });

        }

        protected void BringToFront()

        {

            Topmost = true;

            Activate();

            Topmost = false;

        }

    }

}