lambdaxmethod.cs

public void some_method (Pomodoro.Service ps) {
    pomodoro_service.start.connect (on_pomodoro_service_started);
    pomodoro_service.stop.connect ((state) => {
        cancellable.cancel ();
        start_n_stop_stack.visible_child_name = "start-button";
    });
}

void on_pomodoro_service_started (Pomodoro.State state) {
    state_label.set_pomodoro_state (state);

    cancellable = new Cancellable ();
    Timeout.add (500, () => {
        timer_label.set_time_in_seconds (pomodoro_service.timer.get_remaining_time ());
        return !cancellable.is_cancelled ();
    });

    print (@"Pomodoro started\n");
    start_n_stop_stack.visible_child_name = "stop-button";
}