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 CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_SETTINGS_H_ 6 #define CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_SETTINGS_H_ 7 8 #include <vector> 9 10 #include "base/strings/string16.h" 11 #include "third_party/icu/source/i18n/unicode/timezone.h" 12 13 namespace chromeos { 14 namespace system { 15 16 // This interface provides access to Chrome OS timezone settings. 17 class TimezoneSettings { 18 public: 19 class Observer { 20 public: 21 // Called when the timezone has changed. |timezone| is non-null. 22 virtual void TimezoneChanged(const icu::TimeZone& timezone) = 0; 23 protected: 24 virtual ~Observer(); 25 }; 26 27 static TimezoneSettings* GetInstance(); 28 29 // Returns the current timezone as an icu::Timezone object. 30 virtual const icu::TimeZone& GetTimezone() = 0; 31 virtual string16 GetCurrentTimezoneID() = 0; 32 33 // Sets the current timezone and notifies all Observers. 34 virtual void SetTimezone(const icu::TimeZone& timezone) = 0; 35 virtual void SetTimezoneFromID(const string16& timezone_id) = 0; 36 37 virtual void AddObserver(Observer* observer) = 0; 38 virtual void RemoveObserver(Observer* observer) = 0; 39 40 virtual const std::vector<icu::TimeZone*>& GetTimezoneList() const = 0; 41 42 // Gets timezone ID which is also used as timezone pref value. 43 static string16 GetTimezoneID(const icu::TimeZone& timezone); 44 45 protected: 46 virtual ~TimezoneSettings() {} 47 }; 48 49 } // namespace system 50 } // namespace chromeos 51 52 #endif // CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_SETTINGS_H_ 53
