#ifdef QT_EXPERIMENTAL_CLIENT_DECORATIONS
    QGridLayout *topLayout = new QGridLayout(q);
    topLayout->setContentsMargins(0, 0, 0, 0);

    layout = new QMainWindowLayout(q, topLayout);

    topLayout->addItem(layout, 1, 1);
#else
    layout = new QMainWindowLayout(q, 0);
#endif