Fix color theme for UaModeler

plasma color-themes trolltech-conf uamodeler

Source(s)

• manual working out that UaModeler is a Qt4 app (inspecting the AppImage https://docs.appimage.org/user-guide/run-appimages.html#mount-an-appimage)
• ~/.config/Trolltech.conf: https://wiki.archlinux.org/title/Qt#Styles_in_Qt_4

• UaModeler look bad in dark mode since some things are still using light colors
• the only way to use a light color theme is to change the global plasma theme
• turns out, UaModeler is a Qt4 application which actually only seems to rely on ~/.config/Trolltech.conf
• Qt5/6 applications respect the *.color files in ~/.config/color-schemes/ or /usr/share/color-schemes/ (at least they don’t seem to be affected by changes in ~/.config/Trolltech.conf)
• so, to just change UaModeler to a light theme but have the rest use a dark theme, we can simply change ~/.config/Trolltech.conf to use the configuration for the light theme
  • switch Plasma to Breath Light
  • save ~/.config/Trolltech.conf to e.g. ~/.config/Trolltech-breath-light.conf
  • switch back to Breath Dark
  • copy ~/.config/Trolltech-breath-light.conf to ~/.config/Trolltech.conf
  • UaModeler is now in light mode

ATTENTION

Due to the nature of this workaround, every time the Plasma theme is changed, ~/.config/Trolltech.conf is changed, as well. Therefore, it has to be changed to the light theme manually every time to ensure UaModeler is using the light theme.

Note

Funnily enough, UaExpert on the other hand is a Qt5 app, which adheres much better to the global color theme.