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      1 // Copyright (c) 2010 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_BRIGHTNESS_OBSERVER_H_
      6 #define CHROME_BROWSER_CHROMEOS_BRIGHTNESS_OBSERVER_H_
      7 #pragma once
      8 
      9 #include "base/basictypes.h"
     10 #include "chrome/browser/chromeos/cros/brightness_library.h"
     11 
     12 namespace chromeos {
     13 
     14 // This observer displays a bubble at the bottom of the screen showing the
     15 // current brightness level whenever the user changes it.
     16 class BrightnessObserver : public BrightnessLibrary::Observer {
     17  public:
     18   BrightnessObserver() {}
     19   virtual ~BrightnessObserver() {}
     20 
     21  private:
     22   // BrightnessLibrary::Observer implementation.
     23   virtual void BrightnessChanged(int level, bool user_initiated);
     24 
     25   DISALLOW_COPY_AND_ASSIGN(BrightnessObserver);
     26 };
     27 
     28 }  // namespace chromeos
     29 
     30 #endif  // CHROME_BROWSER_CHROMEOS_BRIGHTNESS_OBSERVER_H_
     31