main.cpp

#include <QApplication>
#include <QDir>
#include <QDesktopWidget>
#include "mainwindow.h"

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

    MainWindow win;
    win.show();
    win.setGeometry(QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter,
        win.size(), app.desktop()->availableGeometry()));
    return app.exec();
}