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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/observer_list.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 #include "chromeos/dbus/dbus_client_implementation_type.h" | |
12 | 11 |
13 namespace chromeos { | 12 namespace chromeos { |
14 | 13 |
15 // SystemClockClient is used to communicate with the system clock. | 14 // SystemClockClient is used to communicate with the system clock. |
16 class CHROMEOS_EXPORT SystemClockClient : public DBusClient { | 15 class CHROMEOS_EXPORT SystemClockClient : public DBusClient { |
17 public: | 16 public: |
18 // Interface for observing changes from the system clock. | 17 // Interface for observing changes from the system clock. |
19 class Observer { | 18 class Observer { |
20 public: | 19 public: |
21 // Called when the status is updated. | 20 // Called when the status is updated. |
22 virtual void SystemClockUpdated() {} | 21 virtual void SystemClockUpdated() {} |
23 protected: | 22 protected: |
24 virtual ~Observer() {} | 23 virtual ~Observer() {} |
25 }; | 24 }; |
26 | 25 |
27 virtual ~SystemClockClient(); | 26 virtual ~SystemClockClient(); |
28 | 27 |
29 // Adds and removes the observer. | 28 // Adds and removes the observer. |
30 virtual void AddObserver(Observer* observer) = 0; | 29 virtual void AddObserver(Observer* observer) = 0; |
31 virtual void RemoveObserver(Observer* observer) = 0; | 30 virtual void RemoveObserver(Observer* observer) = 0; |
32 // Returns true if this object has the given observer. | 31 // Returns true if this object has the given observer. |
33 virtual bool HasObserver(Observer* observer) = 0; | 32 virtual bool HasObserver(Observer* observer) = 0; |
34 | 33 |
35 // Creates the instance. | 34 // Creates the instance. |
36 static SystemClockClient* Create(DBusClientImplementationType type); | 35 static SystemClockClient* Create(); |
37 | 36 |
38 protected: | 37 protected: |
39 // Create() should be used instead. | 38 // Create() should be used instead. |
40 SystemClockClient(); | 39 SystemClockClient(); |
41 | 40 |
42 private: | 41 private: |
43 DISALLOW_COPY_AND_ASSIGN(SystemClockClient); | 42 DISALLOW_COPY_AND_ASSIGN(SystemClockClient); |
44 }; | 43 }; |
45 | 44 |
46 } // namespace chromeos | 45 } // namespace chromeos |
47 | 46 |
48 #endif // CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ | 47 #endif // CHROMEOS_DBUS_SYSTEM_CLOCK_CLIENT_H_ |
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