kde-config-gtk-style-preview software package provides KDE configuration module for GTK+ 2.x and GTK+ 3.x styles selection (extras), 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 kde-config-gtk-style-preview
kde-config-gtk-style-preview is installed in your system.
Make ensure the kde-config-gtk-style-preview package were installed using the commands given below,
$ sudo dpkg-query -l | grep kde-config-gtk-style-preview *
You will get with kde-config-gtk-style-preview package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | KDE |
| Package | kde-config-gtk-style-preview |
| Version | 3:2.2.1-1fakesync1 |
| Description | KDE configuration module for GTK+ 2.x and GTK+ 3.x styles selection (extras) |
| Sub Section | KDE |