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66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp : */
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/* Copyright 2012 Mozilla Foundation and Mozilla contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef OrientationObserver_h
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#define OrientationObserver_h
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#include "mozilla/Observer.h"
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#include "mozilla/dom/ScreenOrientation.h"
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namespace mozilla {
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namespace hal {
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class SensorData;
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typedef mozilla::Observer<SensorData> ISensorObserver;
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} // namespace hal
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} // namespace mozilla
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using mozilla::hal::ISensorObserver;
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using mozilla::hal::SensorData;
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using mozilla::dom::ScreenOrientation;
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class OrientationObserver : public ISensorObserver {
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public:
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OrientationObserver();
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~OrientationObserver();
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// Notification from sensor.
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void Notify(const SensorData& aSensorData);
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// Methods to enable/disable automatic orientation.
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void EnableAutoOrientation();
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void DisableAutoOrientation();
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// Methods called by methods in hal_impl namespace.
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bool LockScreenOrientation(ScreenOrientation aOrientation);
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void UnlockScreenOrientation();
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static OrientationObserver* GetInstance();
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private:
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bool mAutoOrientationEnabled;
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PRTime mLastUpdate;
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PRUint32 mAllowedOrientations;
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// 200 ms, the latency which is barely perceptible by human.
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static const PRTime sMinUpdateInterval = 200 * PR_USEC_PER_MSEC;
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static const PRUint32 sDefaultOrientations =
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mozilla::dom::eScreenOrientation_Portrait |
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mozilla::dom::eScreenOrientation_Landscape;
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};
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#endif
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