LehrerApp/LehrerApp.Desktop/Views/Groups/TeachingModeWindow.axaml.cs

using Avalonia.Controls;
using Avalonia.Interactivity;
using LehrerApp.Desktop.ViewModels;
using LehrerApp.Desktop.ViewModels.Groups;
using Microsoft.Extensions.DependencyInjection;

namespace LehrerApp.Desktop.Views.Groups;

public partial class TeachingModeWindow : Window
{
    public TeachingModeWindow() => InitializeComponent();

    protected override void OnDataContextChanged(EventArgs e)
    {
        base.OnDataContextChanged(e);
        // Gleiches Muster wie LessonViewerDialog (4.5.3): Fenster schließt zuerst, dann Sprung
        // über die MainWindowViewModel-Singleton-Navigation in den Ziel-Tab der Gruppe.
        if (DataContext is TeachingModeViewModel vm)
            vm.LessonInfo.OnNavigateToTab = tabIndex =>
            {
                Close();
                App.Services.GetRequiredService<MainWindowViewModel>()
                    .NavigateToGroupDetail(vm.LessonInfo.GroupId, tabIndex);
            };
    }

    private void OnClose(object? sender, RoutedEventArgs e) => Close();
}