qt5ct - Qt5 Configuration Tool This program allows users to configure Qt5 settings (theme, font, icons, etc.) under DE/WM without Qt integration. Official home page: https://sourceforge.net/projects/qt5ct/ Requirements: - GNU Linux or FreeBSD - qtbase >= 5.4.0 - qtsvg >= 5.4.0 (Runtime dependency for the SVG icons support) - qttools >= 5.4.0 (For build only) Installation: qmake PREFIX=<your installation path> make make install (under root) Add line 'export QT_QPA_PLATFORMTHEME=qt5ct' to ~/.profile and re-login. Alternatively, create the file /etc/X11/Xsession.d/100-qt5ct with the following line: export QT_QPA_PLATFORMTHEME=qt5ct Now restart X11 server to take the changes effect. Extra build options (for advanced users only): qmake DISABLE_WIDGETS=1 - compiles platform plugin without QtWidgets (useful for QML applications only) qmake DISABLE_DBUS=1 - disable D-Bus support (global menu and D-Bus tray icon implementation) qmake PLUGINDIR=<custom path> - changes the default installation path of the plugins (libqt5ct.so and libqt5ct-style.so) Wayland: If you are running Qt application under under Wayland, you should export the following variables: export QT_QPA_PLATFORM=wayland export QT_QPA_PLATFORMTHEME=qt5ct Debug Messages: By default, platform plugin prints debug information to stderr. To disable this behaviour, you should export the following environment variable: export QT_LOGGIN_RULES="qt5ct.debug=false" Another way is to change qtlogging.ini file. See Qt documentation for details: https://doc.qt.io/qt-5/qloggingcategory.html (paragraph "Configuring Categories") Files and Directories: qt5ct - Qt5 configuration tool libqt5ct.so - qt5ct platform plugin libqt5ct-style.so - qt5ct proxy style plugin ~/.config/qt5ct/qt5ct.conf - configuration file ~/.config/qt5ct/qss, ~/.local/share/qt5ct/qss, /usr/share/qt5ct/qss, /usr/local/share/qt5ct/qss - style sheets ~/.config/qt5ct/colors,~/.local/share/qt5ct/colors, /usr/share/qt5ct/colors, /usr/local/share/qt5ct/colors - color schemes Translation: Use Transifex service: https://www.transifex.com/projects/p/qt5ct/