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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_DBUS_POWER_MANAGER_CLIENT_H_
#define CHROME_BROWSER_CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include <string>
namespace dbus {
class Bus;
class ObjectProxy;
class Response;
class Signal;
} // namespace
namespace chromeos {
// PowerManagerClient is used to communicate with the power manager.
class PowerManagerClient
: public base::RefCountedThreadSafe<PowerManagerClient> {
public:
// Interface for observing changes from the power manager.
class Observer {
public:
// Called when the brightness is changed.
// |level| is of the range [0, 100].
// |user_initiated| is true if the action is initiated by the user.
virtual void BrightnessChanged(int level, bool user_initiated) = 0;
};
// Adds and removes the observer.
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Decreases the screen brightness. |allow_off| controls whether or not
// it's allowed to turn off the back light.
virtual void DecreaseScreenBrightness(bool allow_off) = 0;
// Increases the screen brightness.
virtual void IncreaseScreenBrightness() = 0;
// Creates the instance.
static PowerManagerClient* Create(dbus::Bus* bus);
protected:
// These are protected, so we can define sub classes.
PowerManagerClient();
virtual ~PowerManagerClient();
private:
friend class base::RefCountedThreadSafe<PowerManagerClient>;
DISALLOW_COPY_AND_ASSIGN(PowerManagerClient);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
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