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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_SENSORS_SOURCE_CHROMEOS_H_
#define CHROME_BROWSER_CHROMEOS_SENSORS_SOURCE_CHROMEOS_H_
#include "base/memory/ref_counted.h"
#include "content/browser/browser_thread.h"
#include <string>
namespace dbus {
class Bus;
class ObjectProxy;
class Signal;
} // namespace
namespace sensors {
// Creates and manages a dbus signal receiver for device orientation changes,
// and eventually receives data for other motion-related sensors.
class SensorsSourceChromeos
: public base::RefCountedThreadSafe<SensorsSourceChromeos,
BrowserThread::DeleteOnUIThread> {
public:
// Creates an inactive sensors source.
SensorsSourceChromeos();
// Initializes this sensor source and begins listening for signals.
// Returns true on success.
//
// The sensor source performs DBus operations using BrowserThread::FILE,
// which must have been started before calling this method.
bool Init();
// Shuts down this sensors source and the underlying DBus connection.
void Stop();
private:
friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
friend class DeleteTask<SensorsSourceChromeos>;
virtual ~SensorsSourceChromeos();
// Called by dbus:: in when an orientation change signal is received.
void OrientationChangedReceived(dbus::Signal* signal);
// Called by dbus:: when the orientation change signal is initially connected.
void OrientationChangedConnected(const std::string& interface_name,
const std::string& signal_name,
bool success);
scoped_refptr<dbus::Bus> bus_;
dbus::ObjectProxy* sensors_proxy_;
DISALLOW_COPY_AND_ASSIGN(SensorsSourceChromeos);
};
} // namespace sensors
#endif // CHROME_BROWSER_CHROMEOS_SENSORS_SOURCE_CHROMEOS_H_
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