1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_
6#define ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_
7
8#include "ash/ash_export.h"
9
10namespace ash {
11
12class ASH_EXPORT ClockObserver {
13 public:
14  virtual ~ClockObserver() {}
15
16  virtual void OnDateFormatChanged() = 0;
17  virtual void OnSystemClockTimeUpdated() = 0;
18  virtual void OnSystemClockCanSetTimeChanged(bool can_set_time) = 0;
19
20  // Force a refresh (e.g. after the system is resumed).
21  virtual void Refresh() = 0;
22};
23
24}  // namespace ash
25
26#endif  // ASH_SYSTEM_DATE_CLOCK_OBSERVER_H_
27