Qt 5.9 | Qt Location | Places (QML) | main.cpp Example File

Qt 5.9.4 Reference Documentation

# main.cpp Example File

places/main.cpp

      /****************************************************************************
      **
      ** 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/QTextStream>
      #include <QtGui/QGuiApplication>
      #include <QtQml/QQmlApplicationEngine>
      #include <QtQml/QQmlContext>
      #include <QtQuick/QQuickItem>

      static bool parseArgs(QStringList& args, QVariantMap& parameters)
      {

          while (!args.isEmpty()) {

              QString param = args.takeFirst();

              if (param.startsWith("--help")) {
                  QTextStream out(stdout);
                  out << "Usage: " << endl;
                  out << "--plugin.<parameter_name> <parameter_value>    -  Sets parameter = value for plugin" << endl;
                  out.flush();
                  return true;
              }

              if (param.startsWith("--plugin.")) {

                  param.remove(0, 9);

                  if (args.isEmpty() || args.first().startsWith("--")) {
                      parameters[param] = true;
                  } else {

                      QString value = args.takeFirst();

                      if (value == "true" || value == "on" || value == "enabled") {
                          parameters[param] = true;
                      } else if (value == "false" || value == "off"
                                 || value == "disable") {
                          parameters[param] = false;
                      } else {
                          parameters[param] = value;
                      }
                  }
              }
          }
          return false;
      }

      int main(int argc, char *argv[])
      {
          QGuiApplication application(argc, argv);

          QVariantMap parameters;
          QStringList args(QCoreApplication::arguments());

          // Fetch tokens from the environment, if present
          const QByteArray mapboxMapID = qgetenv("MAPBOX_MAP_ID");
          const QByteArray mapboxAccessToken = qgetenv("MAPBOX_ACCESS_TOKEN");
          const QByteArray hereAppID = qgetenv("HERE_APP_ID");
          const QByteArray hereToken = qgetenv("HERE_TOKEN");
          const QByteArray esriToken = qgetenv("ESRI_TOKEN");

          if (!mapboxMapID.isEmpty())
              parameters["mapbox.map_id"] = QString::fromLocal8Bit(mapboxMapID);
          if (!mapboxAccessToken.isEmpty())
              parameters["mapbox.access_token"] = QString::fromLocal8Bit(mapboxAccessToken);
          if (!hereAppID.isEmpty())
              parameters["here.app_id"] = QString::fromLocal8Bit(hereAppID);
          if (!hereToken.isEmpty())
              parameters["here.token"] = QString::fromLocal8Bit(hereToken);
          if (!esriToken.isEmpty())
              parameters["esri.token"] = QString::fromLocal8Bit(esriToken);

          if (parseArgs(args, parameters))
              return 0;

          QQmlApplicationEngine engine;
          engine.addImportPath(QStringLiteral(":/imports"));
          engine.load(QUrl(QStringLiteral("qrc:///places.qml")));
          QObject::connect(&engine, SIGNAL(quit()), qApp, SLOT(quit()));

          QObject *item = engine.rootObjects().first();
          Q_ASSERT(item);

          QMetaObject::invokeMethod(item, "initializeProviders",
                                       Q_ARG(QVariant, QVariant::fromValue(parameters)));

          return application.exec();
      }