public class StackClass : Gtk.Window {
   public Gtk.LevelBar[] barMass;
    public StackClass () {
        var header = new Gtk.HeaderBar();
        header.set_show_close_button(true);
        barMass = new Gtk.LevelBar[10];
        var box2 = new Gtk.Box(Gtk.Orientation.VERTICAL, 1);
        var box1 = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 1);
        var btn = new Gtk.Button.with_label("SAS"); box2.pack_start(btn,true,true,5);
//Стак
        var stack = new Gtk.Stack();
        Gtk.StackSwitcher switcher = new Gtk.StackSwitcher ();
        switcher.set_valign (Gtk.Align.CENTER);
        header.pack_start (switcher);
        stack.set_transition_duration (500);//скорость анимации
        stack.set_transition_type (SLIDE_LEFT_RIGHT);
        switcher.set_stack (stack);//устанавливаем переключателю стак
//создаем 10 прогрессБаров и заполняем ими бокс с флагами expand
        for (int i=0;i<10;i++){
            barMass[i] = new Gtk.LevelBar.for_interval (0.0, 10.0);
            box1.pack_start(barMass[i],true,true,2);
            barMass[i].set_orientation(Gtk.Orientation.VERTICAL);
            //barMass[i].set_mode (Gtk.LevelBarMode.DISCRETE);
            barMass[i].set_inverted(true);
            barMass[i].set_hexpand(true);
        }
        barMass[0].set_value(10.0);

        stack.add_titled(box1,"box1","box1");
        stack.add_titled(box2,"box2","box2");

        this.set_titlebar(header);
        this.destroy.connect(Gtk.main_quit);
        this.border_width = 10;
        this.set_size_request (600, 500);
        this.add(stack);
        btn.clicked.connect(()=> {addNbar(Random.double_range (1, 100));});

        this.key_press_event.connect ((key) => {
            print(key.str + " ");
            addNbar(double.parse(key.str));
            return false;
        });

    }


    public void addNbar(double newV){
        for(int i=0;i<10-1;i++){
            barMass[i].set_value(barMass[i+1].get_value());
        }
        barMass[9].set_value(newV);
    }


    public static int main(string[] args){
        Gtk.init(ref args);
        var s = new StackClass();
        s.show_all();
        Gtk.main();
        return 0;
    }
}