open_action->setShortcut(QKeySequence::Open);
QObject::connect(open_action, SIGNAL(triggered()),
this, SLOT(on_open()));
+
+ QAction* quit_action = new QAction("Quit", this);
+ quit_action->setShortcut(QKeySequence::Quit);
+ QObject::connect(quit_action, SIGNAL(triggered()),
+ this, SLOT(close()));
+
auto file_menu = menuBar()->addMenu("File");
file_menu->addAction(open_action);
+ file_menu->addAction(quit_action);
resize(600, 400);
}