MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);    //QFontDialog fontDialog; //OK
    QFontDialog fontDialog(QFont("Ani"));    
    fontDialog.setOption(QFontDialog::DontUseNativeDialog);    

    if (fontDialog.exec()) // <- select another font than Ani
    {
        qDebug() << fontDialog.selectedFont(); //will return Ani anyway
    }
}