#include <QApplication>
#include <QComboBox>
#include <QPushButton>
#include <QVBoxLayout>
#include <QMenu>
#include <QAction>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWidget w;
    w.setObjectName("Main");

    QVBoxLayout *l = new QVBoxLayout(&w);
    QComboBox *cb = new QComboBox;
    cb->setObjectName("combo");
    cb->addItems(QStringList() << "i1" << "i2");
    l->addWidget(cb);
    QPushButton *pb = new QPushButton;
    pb->setObjectName("button");
    QMenu *menu = new QMenu;
    menu->setObjectName("menu");
    menu->addAction("a1");
    menu->addAction("a2");
    pb->setMenu(menu);
    l->addWidget(pb);
    w.show();
    return a.exec();
}