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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ | 5 #ifndef CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ |
6 #define CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ | 6 #define CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ |
7 | 7 |
8 #include "base/observer_list.h" | 8 #include "base/callback.h" |
9 #include "chromeos/chromeos_export.h" | 9 #include "chromeos/chromeos_export.h" |
10 #include "chromeos/dbus/dbus_client.h" | 10 #include "chromeos/dbus/dbus_client.h" |
11 | 11 |
12 namespace chromeos { | 12 namespace chromeos { |
13 | 13 |
14 // SystemClockClient is used to communicate with the system clock. | 14 // SystemClockClient is used to communicate with the system clock. |
15 class CHROMEOS_EXPORT SystemClockClient : public DBusClient { | 15 class CHROMEOS_EXPORT SystemClockClient : public DBusClient { |
16 public: | 16 public: |
17 // Interface for observing changes from the system clock. | 17 // Interface for observing changes from the system clock. |
18 class Observer { | 18 class Observer { |
19 public: | 19 public: |
20 // Called when the status is updated. | 20 // Called when the status is updated. |
21 virtual void SystemClockUpdated() {} | 21 virtual void SystemClockUpdated(); |
| 22 |
| 23 // Called when the system clock has become settable or unsettable, e.g., |
| 24 // when the clock syncs with or goes out of sync with the network. |
| 25 virtual void SystemClockCanSetTimeChanged(bool can_set_time); |
22 protected: | 26 protected: |
23 virtual ~Observer() {} | 27 virtual ~Observer() {} |
24 }; | 28 }; |
25 | 29 |
26 virtual ~SystemClockClient(); | 30 virtual ~SystemClockClient(); |
27 | 31 |
28 // Adds and removes the observer. | 32 // Adds the given observer. |
29 virtual void AddObserver(Observer* observer) = 0; | 33 virtual void AddObserver(Observer* observer) = 0; |
| 34 // Removes the given observer if this object has the observer. |
30 virtual void RemoveObserver(Observer* observer) = 0; | 35 virtual void RemoveObserver(Observer* observer) = 0; |
31 // Returns true if this object has the given observer. | 36 // Returns true if this object has the given observer. |
32 virtual bool HasObserver(Observer* observer) = 0; | 37 virtual bool HasObserver(Observer* observer) = 0; |
33 | 38 |
| 39 // Sets the system clock. |
| 40 virtual void SetTime(int64 time_in_seconds) = 0; |
| 41 |
| 42 // Checks if the system time can be set. |
| 43 virtual bool CanSetTime() = 0; |
| 44 |
34 // Creates the instance. | 45 // Creates the instance. |
35 static SystemClockClient* Create(); | 46 static SystemClockClient* Create(); |
36 | 47 |
37 protected: | 48 protected: |
38 // Create() should be used instead. | 49 // Create() should be used instead. |
39 SystemClockClient(); | 50 SystemClockClient(); |
40 | 51 |
41 private: | 52 private: |
42 DISALLOW_COPY_AND_ASSIGN(SystemClockClient); | 53 DISALLOW_COPY_AND_ASSIGN(SystemClockClient); |
43 }; | 54 }; |
44 | 55 |
45 } // namespace chromeos | 56 } // namespace chromeos |
46 | 57 |
47 #endif // CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ | 58 #endif // CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ |
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