libqt5designer5 software package provides Qt 5 designer module, 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 libqt5designer5
libqt5designer5 is installed in your system.
Make ensure the libqt5designer5 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libqt5designer5 *
You will get with libqt5designer5 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libqt5designer5 |
| Version | 5.2.1-8build1 |
| Description | Qt 5 designer module |
| Sub Section | libs |