Theme switcher (Light/Dark Mode)

[nebulosa2007]

At last release, 0.1.6 - there was a video with new implemented function do-screen-transition with simple principle switching themes between dark and light that interest me.

I spent some time and here is my implementation of the theme switch! Just like in Mac OSX (or Gnome or KDE, I guess), it automatically switches when the sun rises/sets.

It uses darkman and some hacks (all instructions also written in script):

1. Darkman uses folders $XDG_DATA_DIRS/{dark,light}-mode.d/ and execute scripts in it. So, you need to duplicate scripts in both folders with some edits (on|off commands). I tested another configuration of it with symlinks and it works! You need just one script with case options that execute commands in depends what mode you are using:

mkdir -p $HOME/.config/darkman
chmod +x $HOME/.config/darkman/mode_switcher.sh
sudo ln -s $HOME/.config/darkman /usr/share/dark-mode.d
sudo ln -s $HOME/.config/darkman /usr/share/light-mode.d

2. .service file that provides in package not work with Niri - got error NIRI_SOCKET is not set, so it need another service file that describe at wiki:

~/.config/systemd/user/darkman.service:

[Unit]
PartOf=graphical-session.target
After=graphical-session.target
Requisite=graphical-session.target

[Service]
ExecStart=/usr/bin/darkman run
Restart=on-failure

And finally ~/.config/darkman/mode_swither.sh that can switch:

• Themes for GTK3 and GTK4 apps
• Wallpaper (some kind of dynamic wallpapers)
• Brightness of a screen
• Mako and fuzzel theme
  and send notification after.

Not all will work for you but it's an worked example. List of commands can be extended (for inspiration you could use Dracula project)

I also use it together with wlsunset.

P.S. If anyone knows how to switch modes for Qt5/6 apps (especially Telegram) via shell commands - please let me know.

[YaLTeR]

P.S. If anyone knows how to switch modes for Qt5/6 apps (especially Telegram) via shell commands - please let me know.

For me Telegram uses the standard dark style preference from the portal. Combined with this it works out of the box:

[nebulosa2007]

Thanks for pointing!

Found this issue telegramdesktop/tdesktop#27431 Installed qt6ct, all -portals packets, set env variables, but still nothing..

Arch, tdesktop 5.0.1

[nebulosa2007]

Accidentally found solution for Telegram-dekstop! It need just QT_QPA_PLATFORMTHEME=gtk3 env variable.