[TUI] Added window for images.

Aaru.Tui/ViewModels/Windows/ImageWindowViewModel.cs

@@ -0,0 +1,39 @@
+using System.Windows.Input;
+using Aaru.CommonTypes.Interfaces;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using CommunityToolkit.Mvvm.Input;
+
+namespace Aaru.Tui.ViewModels.Windows;
+
+public sealed partial class ImageWindowViewModel : ViewModelBase
+{
+    readonly string     _filename;
+    readonly IBaseImage _imageFormat;
+    readonly Window     _view;
+
+    public ImageWindowViewModel(Window view, IBaseImage imageFormat, string filename)
+    {
+        _imageFormat = imageFormat;
+        _filename    = filename;
+        _view        = view;
+
+        ExitCommand = new RelayCommand(Exit);
+        BackCommand = new RelayCommand(Back);
+    }
+
+    public ICommand BackCommand { get; }
+    public ICommand ExitCommand { get; }
+
+    void Back()
+    {
+        _view.Close();
+    }
+
+    void Exit()
+    {
+        var lifetime = Application.Current!.ApplicationLifetime as IControlledApplicationLifetime;
+        lifetime!.Shutdown();
+    }
+}