main.cpp Example File

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 #include "browser.h"

 #include <QtCore>
 #include <QtWidgets>
 #include <QtSql>

 void addConnectionsFromCommandline(const QStringList &args, Browser *browser)
 {
     for (int i = 1; i < args.count(); ++i) {
         QUrl url(args.at(i), QUrl::TolerantMode);
         if (!url.isValid()) {
             qWarning("Invalid URL: %s", qPrintable(args.at(i)));
             continue;
         }
         QSqlError err = browser->addConnection(url.scheme(), url.path().mid(1), url.host(),
                                                url.userName(), url.password(), url.port(-1));
         if (err.type() != QSqlError::NoError)
             qDebug() << "Unable to open connection:" << err;
     }
 }

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QMainWindow mainWin;
     mainWin.setWindowTitle(QObject::tr("Qt SQL Browser"));

     Browser browser(&mainWin);
     mainWin.setCentralWidget(&browser);

     QMenu *fileMenu = mainWin.menuBar()->addMenu(QObject::tr("&File"));
     fileMenu->addAction(QObject::tr("Add &Connection..."),
             [&]() { browser.addConnection(); });
     fileMenu->addSeparator();
     fileMenu->addAction(QObject::tr("&Quit"), []() { qApp->quit(); });

     QMenu *helpMenu = mainWin.menuBar()->addMenu(QObject::tr("&Help"));
     helpMenu->addAction(QObject::tr("About"), [&]() { browser.about(); });
     helpMenu->addAction(QObject::tr("About Qt"), []() { qApp->aboutQt(); });

     QObject::connect(&browser, &Browser::statusMessage, [&mainWin](const QString &text) {
         mainWin.statusBar()->showMessage(text);
     });

     addConnectionsFromCommandline(app.arguments(), &browser);
     mainWin.show();
     if (QSqlDatabase::connectionNames().isEmpty())
         QMetaObject::invokeMethod(&browser, "addConnection", Qt::QueuedConnection);

     return app.exec();
 }