[TUI] Add Main Help dialog with F1 shortcut and Ok command

Aaru.Tui/ViewModels/Dialogs/MainHelpDialogViewModel.cs

@@ -0,0 +1,24 @@
+using System.Windows.Input;
+using CommunityToolkit.Mvvm.Input;
+using Iciclecreek.Avalonia.WindowManager;
+
+namespace Aaru.Tui.ViewModels.Dialogs;
+
+public sealed class MainHelpDialogViewModel : ViewModelBase
+{
+    internal ManagedWindow _dialog = null!;
+
+
+    public MainHelpDialogViewModel(ManagedWindow dialog)
+    {
+        _dialog   = dialog;
+        OkCommand = new RelayCommand(Ok);
+    }
+
+    public ICommand OkCommand { get; }
+
+    void Ok()
+    {
+        _dialog.Close(true);
+    }
+}

Aaru.Tui/ViewModels/Windows/MainWindowViewModel.cs

@@ -73,6 +73,7 @@ public sealed partial class MainWindowViewModel : ViewModelBase
         ExitCommand             = new RelayCommand(Exit);
         SectorViewCommand       = new RelayCommand(SectorView);
         GoToPathCommand         = new AsyncRelayCommand(GoToPathAsync);
+        HelpCommand             = new AsyncRelayCommand(HelpAsync);
         OpenSelectedFileCommand = new RelayCommand(OpenSelectedFile, CanOpenSelectedFile);
 
         InformationalVersion =
@@ -107,6 +108,7 @@ public sealed partial class MainWindowViewModel : ViewModelBase
     public ICommand  ExitCommand { get; }
     public ICommand  SectorViewCommand { get; }
     public ICommand  GoToPathCommand { get; }
+    public ICommand  HelpCommand { get; }
     public bool      IsFileInfoAvailable => SelectedFile?.FileInfo != null;
     public bool      SelectedFileIsNotDirectory => SelectedFile?.IsDirectory == false;
     public long?     SelectedFileLength => SelectedFile?.IsDirectory == false ? SelectedFile?.FileInfo?.Length : 0;
@@ -118,6 +120,19 @@ public sealed partial class MainWindowViewModel : ViewModelBase
 
     public string? SelectedFileInformation => SelectedFile?.Information;
 
+    Task HelpAsync()
+    {
+        var dialog = new MainHelpDialog
+        {
+            DataContext = new MainHelpDialogViewModel(null!)
+        };
+
+        // Set the dialog reference after creation
+        ((MainHelpDialogViewModel)dialog.DataContext!)._dialog = dialog;
+
+        return dialog.ShowDialog(_view);
+    }
+
     async Task GoToPathAsync()
     {
         var dialog = new GoToPathDialog

Aaru.Tui/Views/Dialogs/MainHelpDialog.axaml

@@ -0,0 +1,71 @@
+<windowManager:ManagedWindow 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:windowManager="clr-namespace:Iciclecreek.Avalonia.WindowManager;assembly=Iciclecreek.Avalonia.WindowManager"
+                             xmlns:dialogs="clr-namespace:Aaru.Tui.ViewModels.Dialogs"
+                             xmlns:brushes="https://github.com/jinek/consolonia"
+                             mc:Ignorable="d"
+                             d:DesignWidth="800"
+                             d:DesignHeight="450"
+                             x:Class="Aaru.Tui.Views.Dialogs.MainHelpDialog"
+                             Width="40"
+                             Height="8"
+                             WindowStartupLocation="CenterScreen"
+                             BorderBrush="Blue"
+                             CanResize="False"
+                             Title="Help">
+    <Design.DataContext>
+        <dialogs:MainHelpDialogViewModel />
+    </Design.DataContext>
+    <Border BorderThickness="1">
+        <Border.BorderBrush>
+            <brushes:LineBrush LineStyle="DoubleLine"
+                               Brush="Blue" />
+        </Border.BorderBrush>
+        <StackPanel>
+            <Grid ColumnDefinitions="Auto,*"
+                  ColumnSpacing="2">
+                <TextBlock Grid.Column="0"
+                           Foreground="Aqua"
+                           Text="F1 " />
+                <TextBlock Grid.Column="1"
+                           Foreground="SlateBlue"
+                           Text="Shows this help" />
+            </Grid>
+            <Grid ColumnDefinitions="Auto,*"
+                  ColumnSpacing="2">
+                <TextBlock Grid.Column="0"
+                           Foreground="Aqua"
+                           Text="F2 " />
+                <TextBlock Grid.Column="1"
+                           Foreground="SlateBlue"
+                           Text="Sector viewer" />
+            </Grid>
+            <Grid ColumnDefinitions="Auto,*"
+                  ColumnSpacing="2">
+                <TextBlock Grid.Column="0"
+                           Foreground="Aqua"
+                           Text="F4 " />
+                <TextBlock Grid.Column="1"
+                           Foreground="SlateBlue"
+                           Text="Go to the specified path" />
+            </Grid>
+            <Grid ColumnDefinitions="Auto,*"
+                  ColumnSpacing="2">
+                <TextBlock Grid.Column="0"
+                           Foreground="Aqua"
+                           Text="F10" />
+                <TextBlock Grid.Column="1"
+                           Foreground="SlateBlue"
+                           Text="Exits the application" />
+            </Grid>
+            <StackPanel Orientation="Horizontal"
+                        HorizontalAlignment="Right"
+                        Spacing="1">
+                <Button Content="OK"
+                        Command="{Binding OkCommand, Mode=OneWay}" />
+            </StackPanel>
+        </StackPanel>
+    </Border>
+</windowManager:ManagedWindow>

Aaru.Tui/Views/Dialogs/MainHelpDialog.axaml.cs

@@ -0,0 +1,11 @@
+using Iciclecreek.Avalonia.WindowManager;
+
+namespace Aaru.Tui.Views.Dialogs;
+
+public partial class MainHelpDialog : ManagedWindow
+{
+    public MainHelpDialog()
+    {
+        InitializeComponent();
+    }
+}

Aaru.Tui/Views/Windows/MainWindow.axaml

@@ -11,7 +11,10 @@
     </Design.DataContext>
     <DockPanel>
         <Menu DockPanel.Dock="Bottom">
-            <MenuItem Header="ESC     " /> <MenuItem Header="F1  Help" />
+            <MenuItem Header="ESC     " />
+            <MenuItem Header="F1  Help"
+                      Command="{Binding HelpCommand, Mode=OneWay}"
+                      HotKey="F1" />
             <MenuItem Header="F2  ScVw"
                       Command="{Binding SectorViewCommand, Mode=OneWay}"
                       HotKey="F2" />