1 // Copyright 2013 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_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_ 6 #define ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_ 7 8 #include "ash/ash_export.h" 9 #include "base/basictypes.h" 10 #include "base/callback.h" 11 #include "base/compiler_specific.h" 12 #include "chromeos/dbus/power_manager_client.h" 13 #include "chromeos/dbus/session_manager_client.h" 14 15 namespace ash { 16 namespace internal { 17 18 // A class that observes power-management-related events. 19 class ASH_EXPORT PowerEventObserver 20 : public chromeos::PowerManagerClient::Observer, 21 public chromeos::SessionManagerClient::Observer { 22 public: 23 // This class registers/unregisters itself as an observer in ctor/dtor. 24 PowerEventObserver(); 25 virtual ~PowerEventObserver(); 26 27 // chromeos::PowerManagerClient::Observer overrides: 28 virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE; 29 virtual void SuspendImminent() OVERRIDE; 30 virtual void SystemResumed(const base::TimeDelta& sleep_duration) OVERRIDE; 31 32 // chromeos::SessionManagerClient::Observer overrides. 33 virtual void ScreenIsLocked() OVERRIDE; 34 virtual void ScreenIsUnlocked() OVERRIDE; 35 36 // Is the screen currently locked? 37 bool screen_locked_; 38 39 // If set, called when the lock screen has been shown to confirm that the 40 // system is ready to be suspended. 41 base::Closure screen_lock_callback_; 42 43 private: 44 DISALLOW_COPY_AND_ASSIGN(PowerEventObserver); 45 }; 46 47 } // namespace internal 48 } // namespace chromeos 49 50 #endif // ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_ 51