main.cpp Example File

mapviewer/main.cpp
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 #include <QtCore/QTextStream>
 #include <QtGui/QGuiApplication>
 #include <QtQml/QQmlApplicationEngine>
 #include <QtQuick/QQuickItem>
 #if QT_CONFIG(ssl)
 #include <QSslSocket>
 #endif
 #include <QQmlContext>

 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[])
 {
 #if QT_CONFIG(library)
     const QByteArray additionalLibraryPaths = qgetenv("QTLOCATION_EXTRA_LIBRARY_PATH");
     for (const QByteArray &p : additionalLibraryPaths.split(':'))
         QCoreApplication::addLibraryPath(QString(p));
 #endif
     QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     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);
         parameters["mapboxgl.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;
     if (!args.contains(QStringLiteral("osm.useragent")))
         parameters[QStringLiteral("osm.useragent")] = QStringLiteral("QtLocation Mapviewer example");

     QQmlApplicationEngine engine;
 #if QT_CONFIG(ssl)
     engine.rootContext()->setContextProperty("supportsSsl", QSslSocket::supportsSsl());
 #else
     engine.rootContext()->setContextProperty("supportsSsl", false);
 #endif
     engine.addImportPath(QStringLiteral(":/imports"));
     engine.load(QUrl(QStringLiteral("qrc:///mapviewer.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();
 }