Qt OPC UA Viewer

 // Copyright (C) 2018 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 #include "mainwindow.h"
 #include <QApplication>
 #include <QCommandLineParser>
 #include <QCommandLineOption>

 using namespace Qt::Literals::StringLiterals;

 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
     QCoreApplication::setApplicationVersion(QLatin1StringView(QT_VERSION_STR));
     QCoreApplication::setApplicationName("Qt OpcUa Viewer"_L1);

     QCommandLineParser parser;
     parser.addHelpOption();
     parser.addVersionOption();
     parser.addPositionalArgument("url"_L1, "The url to open."_L1);
     parser.process(app);

     const auto positionalArguments = parser.positionalArguments();
     const auto initialUrl = positionalArguments.value(0, "opc.tcp://localhost:48010"_L1);
     MainWindow mainWindow(initialUrl.trimmed());
     mainWindow.setWindowTitle("Qt OPC UA viewer"_L1);
     mainWindow.show();
     return QCoreApplication::exec();
 }