int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    QWidget w;
    auto lay = new QHBoxLayout(&w);
    lay->addSpacerItem(new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Expanding));
    QPushButton pb1("Push me please!");
    QPushButton pb2(QIcon::fromTheme(QIcon::ThemeIcon::DocumentNew), "Push me please!");
    QPushButton pb3("Push me please!");
    QMenu* menu = new QMenu(&pb3);
    menu->addAction("Action 12345678901234567890");
    pb3.setMenu(menu);
    QPushButton pb4(QIcon::fromTheme(QIcon::ThemeIcon::DocumentNew), "Push me please!");
    menu = new QMenu(&pb4);
    menu->addAction("Action 12345678901234567890");
    pb4.setMenu(menu);
    lay->addWidget(&pb1); lay->addWidget(&pb2);lay->addWidget(&pb3);lay->addWidget(&pb4);
    lay->addSpacerItem(new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Expanding));
    w.show();
    return app.exec();
}