问无下拉菜单的Qt菜单栏(单级菜单栏)

EN

class MainWindow : public QMainWindow
{
  Q_OBJECT
public:
  MainWindow( QWidget* parent = 0 ) : QMainWindow(parent)
  {
    QToolBar* toolBar1 = new QToolBar(this);

    QAction* action1 = toolBar1->addAction("one");
    QObject::connect( action1, SIGNAL(triggered()), this, SLOT(onActionOne()));
    action1->setShortcut(QKeySequence("ctrl+o"));   

    QAction* action2 = toolBar1->addAction("two");
    QObject::connect( action2, SIGNAL(triggered()), this, SLOT(onActionTwo()));
    action2->setShortcut(QKeySequence("ctrl+t"));

    addToolBar(Qt::TopToolBarArea, toolBar1);
  }

public slots:
  void onActionOne(){ std::cout << "Action one!" << std::endl; }
  void onActionTwo(){ std::cout << "Action Two!" << std::endl; }
};