src/ash/system/chromeos/power/power_event_observer.h

   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
  17 // A class that observes power-management-related events.
  18 class ASH_EXPORT PowerEventObserver
  19     : public chromeos::PowerManagerClient::Observer,
  20       public chromeos::SessionManagerClient::Observer {
  21  public:
  22   // This class registers/unregisters itself as an observer in ctor/dtor.
  23   PowerEventObserver();
  24   virtual ~PowerEventObserver();
  25
  26   // chromeos::PowerManagerClient::Observer overrides:
  27   virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE;
  28   virtual void SuspendImminent() OVERRIDE;
  29   virtual void SuspendDone(const base::TimeDelta& sleep_duration) OVERRIDE;
  30
  31   // chromeos::SessionManagerClient::Observer overrides.
  32   virtual void ScreenIsLocked() OVERRIDE;
  33   virtual void ScreenIsUnlocked() OVERRIDE;
  34
  35   // Is the screen currently locked?
  36   bool screen_locked_;
  37
  38   // If set, called when the lock screen has been shown to confirm that the
  39   // system is ready to be suspended.
  40   base::Closure screen_lock_callback_;
  41
  42  private:
  43   DISALLOW_COPY_AND_ASSIGN(PowerEventObserver);
  44 };
  45
  46 }  // namespace chromeos
  47
  48 #endif  // ASH_SYSTEM_CHROMEOS_POWER_POWER_EVENT_OBSERVER_H_