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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CHROMEOS_CROS_BRIGHTNESS_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_BRIGHTNESS_LIBRARY_H_
#pragma once
#include "third_party/cros/chromeos_brightness.h"
namespace chromeos {
class BrightnessLibrary {
public:
class Observer {
public:
virtual void BrightnessChanged(int level, bool user_initiated) = 0;
};
virtual ~BrightnessLibrary() {}
virtual void DecreaseScreenBrightness(bool allow_off) = 0;
virtual void IncreaseScreenBrightness() = 0;
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Factory function, creates a new instance and returns ownership.
// For normal usage, access the singleton via CrosLibrary::Get().
static BrightnessLibrary* GetImpl(bool stub);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_BRIGHTNESS_LIBRARY_H_
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