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
12namespace 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.
16class 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