Linuxslaves.com - Do you feel that Qt based applications (like VirtualBox, KDE Connect, VLC, qBittorrent, etc) on your Ubuntu are look awful?. Well, your not alone. Don't worry, today I'm gonna show you a quick tip to get Qt5 applications look better.
In this case, I'm running Ubuntu 18.04 LTS Bionic Beaver. I don't recommend to use this on Ubuntu 20.04 LTS Focal Fossa and 19.10 Eoan Ermine, because it can slow down launching that applications.
In this case, I'm running Ubuntu 18.04 LTS Bionic Beaver. I don't recommend to use this on Ubuntu 20.04 LTS Focal Fossa and 19.10 Eoan Ermine, because it can slow down launching that applications.
So, these are before and after screenshots :
To fix the issue and get Qt5 applications to use a GTK style is quite easy. As usual, open new Terminal window. You can do this by pressing Ctrl+Alt+T on your keyboard.
Suggested read :
Run the following command to install required package which contains Cleanlooks, Motif, Plastique, and Gtk+ 2 Qt5 styles :
sudo apt install qt5-style-plugins
Once installed, now we have to set Qt5 applications to use the Gtk+ 2 style by running this command :
echo "export QT_QPA_PLATFORMTHEME=gtk2" >> ~/.profile
Now log out and log back in to see the changes.
After that, Qt5 applications like qBittorrent, VLC, or Virtualbox should use a Gtk+ style on Ubuntu with GNOME or Unity desktop.
I uploaded this quick tip as video to my YouTube channel. You can check the video above for more details.
So, that's all I can share about how to fix Qt5 applications to use a Gtk+ 2 style in Debian and Ubuntu and its derivatives system (like Elementary OS maybe?. I don't know :D). See you in the next Linux theming tips!.