#include <QtWidgets>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QMainWindow mainWindow;
    QMenu* menu = new QMenu("&Zoom",&mainWindow);

    QAction* zoomInAction = new QAction("Zoom &in", &mainWindow);
    zoomInAction->setShortcut(QKeySequence("i"));
    QObject::connect(zoomInAction, SIGNAL(triggered()), &mainWindow, SLOT(showMaximized()));
    menu->addAction(zoomInAction);

    QAction* zoomOutAction = new QAction("Zoom &Out", &mainWindow);
    zoomOutAction->setShortcut(QKeySequence("o"));
    QObject::connect(zoomOutAction, SIGNAL(triggered()), &mainWindow, SLOT(showNormal()));
    menu->addAction(zoomOutAction);

//// WORKAROUND
//#ifdef Q_OS_MAC
//    QObject::connect(new QShortcut(zoomInAction->shortcut(),zoomInAction->parentWidget()),
//                     SIGNAL(activated()), zoomInAction, SLOT(trigger()));
//    QObject::connect(new QShortcut(zoomOutAction->shortcut(),zoomOutAction->parentWidget()),
//                     SIGNAL(activated()), zoomOutAction, SLOT(trigger()));
//#endif

    mainWindow.menuBar()->addMenu(menu);
    mainWindow.show();
    return a.exec();
}