pjs/widget/gonk/OrientationObserver.h

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C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et ft=cpp : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef OrientationObserver_h
#define OrientationObserver_h
#include "mozilla/Observer.h"
#include "mozilla/dom/ScreenOrientation.h"
namespace mozilla {
namespace hal {
class SensorData;
typedef mozilla::Observer<SensorData> ISensorObserver;
} // namespace hal
} // namespace mozilla
using mozilla::hal::ISensorObserver;
using mozilla::hal::SensorData;
using mozilla::dom::ScreenOrientation;
class OrientationObserver : public ISensorObserver {
public:
OrientationObserver();
~OrientationObserver();
// Notification from sensor.
void Notify(const SensorData& aSensorData);
// Methods to enable/disable automatic orientation.
void EnableAutoOrientation();
void DisableAutoOrientation();
// Methods called by methods in hal_impl namespace.
bool LockScreenOrientation(ScreenOrientation aOrientation);
void UnlockScreenOrientation();
static OrientationObserver* GetInstance();
private:
bool mAutoOrientationEnabled;
PRTime mLastUpdate;
PRUint32 mAllowedOrientations;
// 200 ms, the latency which is barely perceptible by human.
static const PRTime sMinUpdateInterval = 200 * PR_USEC_PER_MSEC;
static const PRUint32 sDefaultOrientations =
mozilla::dom::eScreenOrientation_Portrait |
mozilla::dom::eScreenOrientation_Landscape;
};
#endif