now it works

Mlaumcherb.Client.Avalonia/зримое/DownloadItemView.axaml

@@ -0,0 +1,26 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="Mlaumcherb.Client.Avalonia.зримое.NetworkTaskView"
+             Padding="4" MinHeight="90" MinWidth="200"
+             VerticalAlignment="Top"
+             HorizontalAlignment="Stretch"
+             BorderThickness="1" BorderBrush="#999999">
+    <Grid RowDefinitions="* * *" ColumnDefinitions="* 30">
+        <TextBlock Name="NameText" 
+                   Grid.Row="0" Grid.Column="0" />
+        <Button Grid.Row="0" Grid.Column="1"
+                Classes="button_no_border"
+                Background="Transparent"
+                Foreground="#FF4040"
+                FontSize="12"
+                Click="RemoveFromList">
+            [X]
+        </Button>
+        <TextBlock Name="StatusText"
+            Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" 
+            FontSize="15"/>
+        <TextBlock Name="ProgressText"
+                   Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2" 
+                   FontSize="14"/>
+    </Grid>
+</UserControl>

Mlaumcherb.Client.Avalonia/зримое/DownloadItemView.axaml.cs

@@ -0,0 +1,66 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Threading;
+using Mlaumcherb.Client.Avalonia.сеть;
+
+namespace Mlaumcherb.Client.Avalonia.зримое;
+
+public partial class NetworkTaskView : UserControl
+{
+    public readonly NetworkTask Task;
+    private readonly Action<NetworkTaskView> _removeFromList;
+
+
+    public NetworkTaskView()
+    {
+        throw new Exception();
+    }
+    
+    public NetworkTaskView(NetworkTask task, Action<NetworkTaskView> removeFromList)
+    {
+        Task = task;
+        _removeFromList = removeFromList;
+        InitializeComponent();
+        NameText.Text = task.Name;
+        StatusText.Text = task.DownloadStatus.ToString();
+        task.OnStart += OnTaskOnStart;
+        task.OnProgress += ReportProgress;
+        task.OnStop += OnTaskStop;
+    }
+
+    private void OnTaskOnStart()
+    {
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            StatusText.Text = Task.DownloadStatus.ToString();
+        });
+    }
+
+    private void OnTaskStop(NetworkTask.Status status)
+    {
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            StatusText.Text = status.ToString();
+            if(!string.IsNullOrEmpty(ProgressText.Text))
+            {
+                int speedIndex = ProgressText.Text.IndexOf('(');
+                if(speedIndex > 0)
+                    ProgressText.Text = ProgressText.Text.Remove(speedIndex);
+            }
+        });
+    }
+
+    void ReportProgress(DownloadProgress progress)
+    {
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            ProgressText.Text = progress.ToString();
+        });
+    }
+
+    private void RemoveFromList(object? sender, RoutedEventArgs e)
+    {
+        Task.Cancel();
+        Dispatcher.UIThread.Invoke(() => _removeFromList.Invoke(this));
+    }
+}

Mlaumcherb.Client.Avalonia/зримое/LauncherApp.axaml

@@ -0,0 +1,59 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="Mlaumcherb.Client.Avalonia.зримое.LauncherApp"
+             RequestedThemeVariant="Dark">
+    <Application.Styles>
+        <SimpleTheme />
+        
+        <Style Selector="Border.dark_tr_bg">
+            <Setter Property="Background" Value="#cc232333"/>
+        </Style>
+        
+        <Style Selector="Border.white_border">
+            <Setter Property="BorderThickness" Value="1"/>
+            <Setter Property="BorderBrush" Value="White"/>
+        </Style>
+        
+        <Style Selector="Button.button_no_border">
+            <Setter Property="BorderThickness" Value="1"/>
+            <Setter Property="BorderBrush" Value="Transparent"/>
+        </Style>
+        
+        <Style Selector="Button.menu_button">
+            <Setter Property="Background" Value="Transparent"/>
+            <Setter Property="Padding" Value="4 0"/>
+            <Setter Property="MinWidth" Value="50"/>
+        </Style>
+        
+        <Style Selector="Border.menu_separator">
+            <Setter Property="Background" Value="#ff505050"/>
+            <Setter Property="Width" Value="1"/>
+            <Setter Property="Margin" Value="4"/>
+        </Style>
+        
+        <Style Selector="ScrollBar /template/ Border">
+            <Setter Property="Width" Value="5"/>
+            <Setter Property="Margin" Value="4"/>
+            <Setter Property="ClipToBounds" Value="True"/>
+            <Setter Property="CornerRadius" Value="0"/>
+        </Style>
+        <Style Selector="ScrollBar /template/ Rectangle">
+            <Setter Property="Fill" Value="#d8ceb9"/>
+        </Style>
+        <Style Selector="ScrollBar /template/ Thumb">
+            <Setter Property="Background" Value="#fd7300"/>
+            <Setter Property="Cursor" Value="Hand"/>
+            <Setter Property="CornerRadius" Value="0"/>
+        </Style>
+        <Style Selector="ScrollBar /template/ Thumb /template/ Border">
+            <Setter Property="ClipToBounds" Value="True"/>
+            <Setter Property="CornerRadius" Value="0"/>
+            <Setter Property="Width" Value="5"/>
+        </Style>
+        
+    </Application.Styles>
+    
+    <Application.Resources>
+        <FontFamily x:Key="MonospaceFont">avares://млаумчерб/капитал/IBMPlexMono-Regular.ttf</FontFamily>
+    </Application.Resources>
+</Application>

Mlaumcherb.Client.Avalonia/зримое/LauncherApp.axaml.cs

@@ -0,0 +1,29 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace Mlaumcherb.Client.Avalonia.зримое;
+
+public class LauncherApp : Application
+{
+    public static LauncherLogger Logger = new();
+    public static Config Config = new();
+    
+    public override void Initialize()
+    {
+        Logger.LogInfo(nameof(LauncherApp), "приложение запущено");
+        Config = Config.LoadFromFile();
+        Logger.DebugLogEnabled = Config.debug;
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow();
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

Mlaumcherb.Client.Avalonia/зримое/LogMessageView.axaml

@@ -0,0 +1,13 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Mlaumcherb.Client.Avalonia.зримое.LogMessageView"
+             FontSize="14">
+    <SelectableTextBlock Name="ContentTextBox"
+                         FontSize="{Binding $parent.FontSize}"
+                         TextWrapping="Wrap"
+                         VerticalAlignment="Top"
+                         Background="Transparent"/>
+</UserControl>

Mlaumcherb.Client.Avalonia/зримое/LogMessageView.axaml.cs

@@ -0,0 +1,23 @@
+using Avalonia.Controls;
+
+namespace Mlaumcherb.Client.Avalonia.зримое;
+
+public partial class LogMessageView : UserControl
+{
+    public static ILogFormat ShortLogFormat = new DefaultLogFormat
+    {
+        TimeStampFormat = MyTimeFormat.TimeOnly,
+        PrintContext = false
+    }; 
+    
+    public LogMessageView()
+    {
+        throw new Exception();
+    }
+
+    public LogMessageView(LauncherLogger.LogMessage m)
+    {
+        InitializeComponent();
+        ContentTextBox.Text = ShortLogFormat.CreateMessage(m.context, m.severity, m.message);
+    }
+}

Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml

@@ -0,0 +1,139 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:gif="clr-namespace:Avalonia.Labs.Gif;assembly=Avalonia.Labs.Gif"
+        xmlns:local="clr-namespace:Mlaumcherb.Client.Avalonia"
+        x:Class="Mlaumcherb.Client.Avalonia.зримое.MainWindow"
+        Name="window"
+        Title="млаумчерб"
+        Icon="avares://млаумчерб/капитал/кубе.ico"
+        FontFamily="{StaticResource MonospaceFont}" FontSize="18"
+        MinWidth="1200" MinHeight="700"
+        Width="800" Height="500"
+        WindowStartupLocation="CenterScreen">
+    <Grid>
+        <Grid.RowDefinitions>* 30</Grid.RowDefinitions>
+        <Image Grid.RowSpan="2" Stretch="UniformToFill"
+               Source="avares://млаумчерб/капитал/фоне.png"/>
+        
+        <Grid Grid.Row="0" Margin="10">
+            <Grid.ColumnDefinitions>* 300 *</Grid.ColumnDefinitions>
+            
+            <!-- Central panel -->
+            <Border Grid.Column="1" 
+                    Classes="dark_tr_bg white_border"
+                    Margin="10 0">
+                <Grid>
+                    <Grid.RowDefinitions>* 60</Grid.RowDefinitions>
+                    <StackPanel Orientation="Vertical" Margin="10" Spacing="10">
+                        <TextBlock>Версия:</TextBlock>
+                        <ComboBox Name="VersionComboBox"/>
+                        
+                        <TextBlock>Ник:</TextBlock>
+                        <TextBox Background="Transparent"
+                                 Text="{Binding #window.PlayerName}"/>
+                        
+                        <TextBlock>
+                            <Run>Выделенная память:</Run>
+                            <TextBox Background="Transparent" Padding="0"
+                                     BorderThickness="1"
+                                     BorderBrush="#777777"
+                                     Text="{Binding #window.MemoryLimit}">
+                            </TextBox>
+                            <Run>Мб</Run>
+                        </TextBlock>
+                        <Slider Minimum="2048" Maximum="8192"
+                                Value="{Binding #window.MemoryLimit}">
+                        </Slider>
+                        
+                        <CheckBox IsChecked="{Binding #window.CheckGameFiles}">
+                            Проверять файлы игры
+                        </CheckBox>
+                        <CheckBox IsChecked="{Binding #window.EnableJavaDownload}">
+                            Скачивать джаву
+                        </CheckBox>
+                    </StackPanel>
+                    <Button Name="LaunchButton" Grid.Row="1"
+                            Margin="10" Padding="0 0 0 4"
+                            Classes="button_no_border"
+                            Background="#BBfd7300"
+                            Click="Запуск">
+                        Запуск
+                    </Button>
+                </Grid>
+            </Border>
+            
+            <!-- Left panel -->
+            <Border Grid.Column="0" 
+                    Classes="dark_tr_bg white_border">
+                <Grid>
+                    <Grid.RowDefinitions>36 *</Grid.RowDefinitions>
+                    <Border Classes="white_border" Margin="-1" Padding="4">
+                        <DockPanel>
+                            <TextBlock FontWeight="Bold"
+                                       DockPanel.Dock="Left">
+                                Лог
+                            </TextBlock>
+                            <Button Click="ClearLogPanel"
+                                    Classes="menu_button"
+                                    DockPanel.Dock="Right"
+                                    HorizontalAlignment="Right">
+                                очистить
+                            </Button>
+                        </DockPanel>
+                    </Border>
+                    <ScrollViewer Name="LogScrollViewer" Grid.Row="1" 
+                                  HorizontalScrollBarVisibility="Disabled"
+                                  VerticalScrollBarVisibility="Visible"
+                                  Background="Transparent">
+                        <StackPanel Name="LogPanel" 
+                                    VerticalAlignment="Top"/>
+                    </ScrollViewer>
+                </Grid>
+            </Border>
+            
+            <!-- Right panel -->
+            <Border Grid.Column="2" Classes="dark_tr_bg white_border">
+                <Grid>
+                    <Grid.RowDefinitions>36 *</Grid.RowDefinitions>
+                    <Border Classes="white_border" Margin="-1" Padding="4">
+                        <DockPanel>
+                            <TextBlock FontWeight="Bold"
+                                       DockPanel.Dock="Left">
+                                Загрузки
+                            </TextBlock>
+                            <Button Click="ClearDownloadsPanel"
+                                    Classes="menu_button"
+                                    DockPanel.Dock="Right"
+                                    HorizontalAlignment="Right">
+                                очистить
+                            </Button>
+                        </DockPanel>
+                    </Border>
+                    <ScrollViewer Grid.Row="1" 
+                                  HorizontalScrollBarVisibility="Disabled"
+                                  VerticalScrollBarVisibility="Visible"
+                                  Background="Transparent" 
+                                  Padding="1">
+                        <StackPanel Name="DownloadsPanel" 
+                                    VerticalAlignment="Top"/>    
+                    </ScrollViewer>
+                </Grid>
+            </Border>
+        </Grid>
+        <Border Grid.Row="1" Background="#954808B0">
+            <Grid>
+                <StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
+                    <Button Classes="menu_button button_no_border" Click="ОткрытьПапкуЛаунчера">папка лаунчера</Button>
+                    <Border Classes="menu_separator"/>
+                    <Button Classes="menu_button button_no_border" Click="ОткрытьФайлЛогов">лог-файл</Button>
+                </StackPanel>
+                <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+                    <Button Classes="menu_button button_no_border" Click="ОткрытьРепозиторий">исходный код</Button>
+                    <gif:GifImage 
+                        Width="30" Height="30" Stretch="Uniform"
+                        Source="avares://млаумчерб/капитал/лисик.gif"/>
+                </StackPanel>
+            </Grid>
+        </Border>
+    </Grid>
+</Window>

Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml.cs

@@ -0,0 +1,199 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Data;
+using Avalonia.Interactivity;
+using Avalonia.Platform.Storage;
+using Avalonia.Threading;
+using Mlaumcherb.Client.Avalonia.классы;
+using Mlaumcherb.Client.Avalonia.холопы;
+
+namespace Mlaumcherb.Client.Avalonia.зримое;
+
+public partial class MainWindow : Window
+{
+    public static readonly StyledProperty<string> PlayerNameProperty =
+        AvaloniaProperty.Register<MainWindow, string>(nameof(PlayerName),
+            defaultBindingMode: BindingMode.TwoWay);
+    public string PlayerName
+    {
+        get => GetValue(PlayerNameProperty);
+        set => SetValue(PlayerNameProperty, value);
+    }
+    
+    public static readonly StyledProperty<int> MemoryLimitProperty =
+        AvaloniaProperty.Register<MainWindow, int>(nameof(MemoryLimit),
+            defaultBindingMode: BindingMode.TwoWay, defaultValue: 2048);
+    public int MemoryLimit
+    {
+        get => GetValue(MemoryLimitProperty);
+        set => SetValue(MemoryLimitProperty, value);
+    }
+    
+    public static readonly StyledProperty<bool> CheckGameFilesProperty =
+        AvaloniaProperty.Register<MainWindow, bool>(nameof(CheckGameFiles),
+            defaultBindingMode: BindingMode.TwoWay, defaultValue: false);
+    public bool CheckGameFiles
+    {
+        get => GetValue(CheckGameFilesProperty);
+        set => SetValue(CheckGameFilesProperty, value);
+    }
+    
+    
+    public static readonly StyledProperty<bool> EnableJavaDownloadProperty =
+        AvaloniaProperty.Register<MainWindow, bool>(nameof(EnableJavaDownload),
+            defaultBindingMode: BindingMode.TwoWay, defaultValue: true);
+    public bool EnableJavaDownload
+    {
+        get => GetValue(EnableJavaDownloadProperty);
+        set => SetValue(EnableJavaDownloadProperty, value);
+    }
+    
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+    
+    protected override async void OnLoaded(RoutedEventArgs e)
+    {
+        try
+        {
+            LauncherApp.Logger.OnLogMessage += GuiLogMessage;
+
+            PlayerName = LauncherApp.Config.player_name;
+            MemoryLimit = LauncherApp.Config.max_memory;
+            EnableJavaDownload = LauncherApp.Config.download_java;
+
+            VersionComboBox.SelectedIndex = 0;
+            VersionComboBox.IsEnabled = false;
+            var versions = await GameVersion.GetAllVersionsAsync();
+            Dispatcher.UIThread.Invoke(() =>
+            {
+                foreach (var p in versions)
+                {
+                    VersionComboBox.Items.Add(new VersionItemView(p));
+                    if (LauncherApp.Config.last_launched_version != null &&
+                        p.Name == LauncherApp.Config.last_launched_version)
+                        VersionComboBox.SelectedIndex = VersionComboBox.Items.Count - 1;
+                }
+                VersionComboBox.IsEnabled = true;
+            });
+        }
+        catch (Exception ex)
+        {
+            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
+        }
+    }
+
+    private void GuiLogMessage(LauncherLogger.LogMessage msg)
+    {
+        if (msg.severity == LogSeverity.Debug) return;
+
+        Dispatcher.UIThread.Invoke(() =>
+        {
+            double offsetFromBottom = LogScrollViewer.Extent.Height - LogScrollViewer.Offset.Y - LogScrollViewer.Viewport.Height;
+            bool is_scrolled_to_end = offsetFromBottom < 20.0; // scrolled less then one line up 
+            LogPanel.Children.Add(new LogMessageView(msg));
+            if (is_scrolled_to_end) LogScrollViewer.ScrollToEnd();
+        });
+    }
+
+    private async void Запуск(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            Dispatcher.UIThread.Invoke(() => LaunchButton.IsEnabled = false);
+            
+            var selectedVersionView = (VersionItemView?)VersionComboBox.SelectedItem;
+            var selectedVersion = selectedVersionView?.Props;
+            LauncherApp.Config.last_launched_version = selectedVersion?.Name;
+            LauncherApp.Config.player_name = PlayerName;
+            LauncherApp.Config.max_memory = MemoryLimit;
+            LauncherApp.Config.download_java = EnableJavaDownload;
+            LauncherApp.Config.SaveToFile();
+            if (selectedVersion == null) 
+                return;
+            
+            var v = await GameVersion.CreateFromPropsAsync(selectedVersion);
+            await v.UpdateFiles(CheckGameFiles, nt =>
+                {
+                    Dispatcher.UIThread.Invoke(() =>
+                    {
+                        DownloadsPanel.Children.Add(new NetworkTaskView(nt,
+                            ntv => DownloadsPanel.Children.Remove(ntv)));
+                    });
+                }
+            );
+            Dispatcher.UIThread.Invoke(() =>
+            {
+                CheckGameFiles = false;
+            });
+            await v.Launch();
+        }
+        catch (Exception ex)
+        {
+            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
+        }
+        finally
+        {
+            Dispatcher.UIThread.Invoke(() =>
+            {
+                LaunchButton.IsEnabled = true;
+            });
+        }
+    }
+
+    private void ОткрытьПапкуЛаунчера(object? s, RoutedEventArgs e)
+    {
+        try
+        {
+            Launcher.LaunchDirectoryInfoAsync(new DirectoryInfo(Directory.GetCurrent().ToString()))
+                .ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
+        }
+    }
+    
+    private void ОткрытьФайлЛогов(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            Launcher.LaunchFileInfoAsync(new FileInfo(LauncherApp.Logger.LogfileName.ToString()))
+                .ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
+        }
+    }
+
+    private void ОткрытьРепозиторий(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            Launcher.LaunchUriAsync(new Uri("https://timerix.ddns.net:3322/Timerix/mlaumcherb"))
+                .ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
+        }
+    }
+
+    private void ClearLogPanel(object? sender, RoutedEventArgs e)
+    {
+        LogPanel.Children.Clear();
+    }
+    
+    
+    private void ClearDownloadsPanel(object? sender, RoutedEventArgs e)
+    {
+        foreach (var control in DownloadsPanel.Children)
+        {
+            var nt = (NetworkTaskView)control;
+            nt.Task.Cancel();
+        }
+        DownloadsPanel.Children.Clear();
+    }
+}

Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml

@@ -0,0 +1,9 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:local="clr-namespace:Mlaumcherb.Client.Avalonia"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="Mlaumcherb.Client.Avalonia.зримое.VersionItemView">
+    <TextBlock Name="text" Background="Transparent"/>
+</UserControl>

Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml.cs

@@ -0,0 +1,31 @@
+using Avalonia.Controls;
+using Avalonia.Media;
+using Mlaumcherb.Client.Avalonia.классы;
+
+namespace Mlaumcherb.Client.Avalonia.зримое;
+
+public partial class VersionItemView : ListBoxItem
+{
+    public GameVersionProps Props { get; }
+    private SolidColorBrush _avaliableColor = new(Color.FromRgb(30, 130, 40));
+    private SolidColorBrush _unavaliableColor = new(Color.FromRgb(170, 70, 70));
+
+    public VersionItemView()
+    {
+        throw new Exception();
+    }
+    
+    public VersionItemView(GameVersionProps props)
+    {
+        Props = props;
+        InitializeComponent();
+        text.Text = props.Name;
+        props.OnDownloadCompleted += UpdateBackground;
+        UpdateBackground();
+    }
+
+    private void UpdateBackground()
+    {
+        Background = Props.IsDownloaded ? _avaliableColor : _unavaliableColor;
+    }
+}