logfilepositionsource.h

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// Copyright (C) 2021 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#ifndef LOGFILEPOSITIONSOURCE_H

#define LOGFILEPOSITIONSOURCE_H

#include <QtPositioning/qgeopositioninfosource.h>

QT_BEGIN_NAMESPACE

class QTimer;

QT_END_NAMESPACE

class LogFilePositionSource : public QGeoPositionInfoSource

    Q_OBJECT

public:

    // This class is optimized to reduce the file IO.

    // Initially it was reading the file line-by-line.

    // It does not modify the data, so it was optimized to just hold the

    // const reference to the pre-existing data, that can now be read once

    // for all the instances of this class (for example, during the

    // initTestCase() call).

    LogFilePositionSource(const QList<QByteArray> &data, QObject *parent = 0);

    QGeoPositionInfo lastKnownPosition(bool fromSatellitePositioningMethodsOnly = false) const override;

    PositioningMethods supportedPositioningMethods() const override;

    int minimumUpdateInterval() const override;

    Error error() const override;

signals:

    void noDataLeft();

    void updatesStarted();

    void updatesStopped();

public slots:

    virtual void startUpdates() override;

    virtual void stopUpdates() override;

    virtual void requestUpdate(int timeout = 5000) override;

private slots:

    void readNextPosition();

private:

    bool canReadLine() const;

    QTimer *timer;

    QGeoPositionInfo lastPosition;

    Error lastError = QGeoPositionInfoSource::NoError;

    const QList<QByteArray> &lines;

    qsizetype index = -1;

    bool noDataEmitted = false;

};

#endif