events.cs

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";
}

void on_pomodoro_service_stopped () {
    cancellable.cancel ();
    start_n_stop_stack.visible_child_name = "start-button";
}

void on_start_button_clicked () {
    return_if_fail (pomodoro_service != null);
    pomodoro_service.start_next ();
}

void on_stop_button_clicked () {
    return_if_fail (pomodoro_service != null);
    pomodoro_service.stop ();
}