chrome/browser/chromeos/power/brightness_observer.h

   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_POWER_BRIGHTNESS_OBSERVER_H_
   6 #define CHROME_BROWSER_CHROMEOS_POWER_BRIGHTNESS_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "chromeos/dbus/power_manager_client.h"
  11
  12 namespace chromeos {
  13
  14 // This observer listens for changes to the screen brightness and notifies
  15 // extensions and ash::PowerButtonController about them.
  16 class BrightnessObserver : public PowerManagerClient::Observer {
  17  public:
  18   // This class registers/unregisters itself as an observer in ctor/dtor.
  19   BrightnessObserver();
  20   virtual ~BrightnessObserver();
  21
  22  private:
  23   // PowerManagerClient::Observer implementation.
  24   virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE;
  25
  26   DISALLOW_COPY_AND_ASSIGN(BrightnessObserver);
  27 };
  28
  29 }  // namespace chromeos
  30
  31 #endif  // CHROME_BROWSER_CHROMEOS_POWER_BRIGHTNESS_OBSERVER_H_