appmenu-qt software package provides application menu for Qt, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install appmenu-qt
appmenu-qt is installed in your system.
Make ensure the appmenu-qt package were installed using the commands given below,
$ sudo dpkg-query -l | grep appmenu-qt *
You will get with appmenu-qt package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | X Window System software |
| Package | appmenu-qt |
| Version | 0.2.7+14.04.20140305-0ubuntu1 |
| Description | application menu for Qt |
| Sub Section | x11 |