| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the examples of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| #include <QtCore> |
| |
| #include "logfilepositionsource.h" |
| |
| LogFilePositionSource::LogFilePositionSource(QObject *parent) |
| : QGeoPositionInfoSource(parent), |
| logFile(new QFile(this)), |
| timer(new QTimer(this)) |
| { |
| connect(timer, SIGNAL(timeout()), this, SLOT(readNextPosition())); |
| |
| logFile->setFileName(":/simplelog.txt"); |
| if (!logFile->open(QIODevice::ReadOnly)) |
| qWarning() << "Error: cannot open source file" << logFile->fileName(); |
| } |
| |
| QGeoPositionInfo LogFilePositionSource::lastKnownPosition(bool /*fromSatellitePositioningMethodsOnly*/) const |
| { |
| return lastPosition; |
| } |
| |
| LogFilePositionSource::PositioningMethods LogFilePositionSource::supportedPositioningMethods() const |
| { |
| return AllPositioningMethods; |
| } |
| |
| int LogFilePositionSource::minimumUpdateInterval() const |
| { |
| return 500; |
| } |
| |
| void LogFilePositionSource::startUpdates() |
| { |
| int interval = updateInterval(); |
| if (interval < minimumUpdateInterval()) |
| interval = minimumUpdateInterval(); |
| |
| timer->start(interval); |
| } |
| |
| void LogFilePositionSource::stopUpdates() |
| { |
| timer->stop(); |
| } |
| |
| void LogFilePositionSource::requestUpdate(int /*timeout*/) |
| { |
| // For simplicity, ignore timeout - assume that if data is not available |
| // now, no data will be added to the file later |
| if (logFile->canReadLine()) |
| readNextPosition(); |
| else |
| emit updateTimeout(); |
| } |
| |
| void LogFilePositionSource::readNextPosition() |
| { |
| QByteArray line = logFile->readLine().trimmed(); |
| if (!line.isEmpty()) { |
| QList<QByteArray> data = line.split(' '); |
| double latitude; |
| double longitude; |
| bool hasLatitude = false; |
| bool hasLongitude = false; |
| QDateTime timestamp = QDateTime::fromString(QString(data.value(0)), Qt::ISODate); |
| latitude = data.value(1).toDouble(&hasLatitude); |
| longitude = data.value(2).toDouble(&hasLongitude); |
| |
| if (hasLatitude && hasLongitude && timestamp.isValid()) { |
| QGeoCoordinate coordinate(latitude, longitude); |
| QGeoPositionInfo info(coordinate, timestamp); |
| if (info.isValid()) { |
| lastPosition = info; |
| emit positionUpdated(info); |
| } |
| } |
| } |
| } |
| |
| QGeoPositionInfoSource::Error LogFilePositionSource::error() const |
| { |
| return QGeoPositionInfoSource::NoError; |
| } |