src/location/qnmeapositioninfosource_p.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 25 Aug 2010 15:49:42 +0300
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QNMEAPOSITIONINFOSOURCE_P_H
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#define QNMEAPOSITIONINFOSOURCE_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  It exists purely as an
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// implementation detail.  This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qnmeapositioninfosource.h"
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#include "qgeopositioninfo.h"
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#include <QObject>
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#include <QQueue>
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#include <QPointer>
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QT_BEGIN_NAMESPACE
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class QBasicTimer;
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class QTimerEvent;
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class QTimer;
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QT_END_NAMESPACE
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QT_BEGIN_HEADER
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QTM_BEGIN_NAMESPACE
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class QNmeaReader;
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struct QPendingGeoPositionInfo {
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    QGeoPositionInfo info;
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    bool hasFix;
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};
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class QNmeaPositionInfoSourcePrivate : public QObject
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{
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    Q_OBJECT
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public:
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    explicit QNmeaPositionInfoSourcePrivate(QNmeaPositionInfoSource *parent);
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    ~QNmeaPositionInfoSourcePrivate();
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    void startUpdates();
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    void stopUpdates();
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    void requestUpdate(int msec);
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    bool parsePosInfoFromNmeaData(const char *data,
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                                  int size,
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                                  QGeoPositionInfo *posInfo,
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                                  bool *hasFix);
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    void notifyNewUpdate(QGeoPositionInfo *update, bool fixStatus);
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    QNmeaPositionInfoSource::UpdateMode m_updateMode;
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    QPointer<QIODevice> m_device;
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    QGeoPositionInfo m_lastUpdate;
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    bool m_invokedStart;
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public Q_SLOTS:
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    void readyRead();
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protected:
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    void timerEvent(QTimerEvent *event);
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private Q_SLOTS:
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    void emitPendingUpdate();
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    void sourceDataClosed();
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    void updateRequestTimeout();
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private:
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    bool openSourceDevice();
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    bool initialize();
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    void prepareSourceDevice();
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    void emitUpdated(const QGeoPositionInfo &update);
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    QNmeaPositionInfoSource *m_source;
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    QNmeaReader *m_nmeaReader;
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    QBasicTimer *m_updateTimer;
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    QGeoPositionInfo m_pendingUpdate;
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    QDate m_currentDate;
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    QTimer *m_requestTimer;
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    bool m_noUpdateLastInterval;
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    bool m_updateTimeoutSent;
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    bool m_connectedReadyRead;
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};
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class QNmeaReader
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{
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public:
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    explicit QNmeaReader(QNmeaPositionInfoSourcePrivate *sourcePrivate)
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            : m_proxy(sourcePrivate) {}
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    virtual ~QNmeaReader() {}
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    virtual void readAvailableData() = 0;
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protected:
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    QNmeaPositionInfoSourcePrivate *m_proxy;
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};
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class QNmeaRealTimeReader : public QNmeaReader
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{
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public:
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    explicit QNmeaRealTimeReader(QNmeaPositionInfoSourcePrivate *sourcePrivate);
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    virtual void readAvailableData();
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};
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class QNmeaSimulatedReader : public QObject, public QNmeaReader
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{
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    Q_OBJECT
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public:
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    explicit QNmeaSimulatedReader(QNmeaPositionInfoSourcePrivate *sourcePrivate);
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    ~QNmeaSimulatedReader();
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    virtual void readAvailableData();
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protected:
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    virtual void timerEvent(QTimerEvent *event);
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private Q_SLOTS:
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    void simulatePendingUpdate();
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private:
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    bool setFirstDateTime();
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    void processNextSentence();
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    QQueue<QPendingGeoPositionInfo> m_pendingUpdates;
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    int m_currTimerId;
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    bool m_hasValidDateTime;
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};
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QTM_END_NAMESPACE
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QT_END_HEADER
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#endif