QSystemTrayIcon QMenu Submenu with Qt 5

Question

I have a program which creates QMenu and adds QMenu to first menu. The program runs perfectly on qt4, but when I compile it with qt5, the submenu does not appear. Here is an example code:

QMenu *menu = this->menuBar()->addMenu("Menu");
QMenu *menu2 = menu->addMenu("Menu2");
QAction *act = menu2->addAction("act");

QSystemTrayIcon *qsti = new QSystemTrayIcon(this);
qsti->setContextMenu(menu);
qsti->show();

Menubar shows everything correctly but systemtrayicon fails to show submenu. Secreenshots:

Here, you can see that there is no submenu in the second picture(systemtray). Is there any workaround to solve this issue? I'm on Ubuntu 15.04 with Qt 5.4.1.

Answer 1

Step forward is:

QMenu *menu = this->menuBar()->addMenu("Menu");
QMenu *menu2 = new QMenu("Menu2", menu);
QAction *act = menu2->addAction("act");
menu->addMenu(menu2);

QSystemTrayIcon *icon = new QSystemTrayIcon(this);
icon->setContextMenu(menu);
icon->show();

Now it shows that there is action but on my Ubuntu it is displayed with some kind of bug. Can you try it?