Програми для обліку

using Gtk;

class Program
{
    public static void Main()
    {
        Application.Init();
        new FirstWindow();
        Application.Run();
    }

    public static void Quit()
    {
        Application.Quit();
    }
}

using Gtk;

class FirstWindow : Window
{
    Toolbar ToolbarTop = new Toolbar();

    public FirstWindow() : base("Test")
    {
        SetDefaultSize(600, 600);
        SetPosition(WindowPosition.Center);

        DeleteEvent += delegate { Program.Quit(); };

        VBox vBox = new VBox();
        Add(vBox);

        vBox.PackStart(ToolbarTop, false, false, 0);

        CreateToolbar();

        ShowAll();
    }

    void CreateToolbar()
    {
        ToolButton addButton = new ToolButton(new Image(Stock.Add, IconSize.Menu), "Додати") { TooltipText = "Додати" };
        addButton.Clicked += OnAddClick;
        ToolbarTop.Add(addButton);

        ToolItem toolItemSeparator = new ToolItem { new Separator(Orientation.Horizontal) };
        ToolbarTop.Add(toolItemSeparator);

        MenuToolButton button = new MenuToolButton(new Image(Stock.Find, IconSize.Menu), "Кроки") { IsImportant = true };
        button.Clicked += OnMenuButtonClick;
        button.Menu = ToolbarSubMenu();
        ToolbarTop.Add(button);
    }

    Menu ToolbarSubMenu()
    {
        Menu Menu = new Menu();

        {
            MenuItem item = new MenuItem("Крок 1");
            item.Activated += (object? sender, EventArgs args) => { };
            Menu.Append(item);
        }

        {
            MenuItem item = new MenuItem("Крок 2");
            item.Activated += (object? sender, EventArgs args) => { };
            Menu.Append(item);
        }

        Menu.ShowAll();

        return Menu;
    }

    void OnAddClick(object? sender, EventArgs args) { }
    void OnMenuButtonClick(object? sender, EventArgs args)
    {
        if (sender != null)
            ((Menu)((MenuToolButton)sender).Menu).Popup();
    }
}