DBus code to add a progress bar in Spotify's taskbar icon. The progress bar moves as the song progresses.
Make sure you have Qt6 installed. You can get this to work with Qt5 as well, but you'll need to tweak the CMakeLists.txt if you want to do that. You also need DBus and Qt bindings for it installed.
You should also have an application file for Spotify (like spotify.desktop) in path (/usr/share/applications/ or ~/.local/share/applications/).
$ git clone https://github.com/DMaroo/spotifire
$ mkdir build
$ cd build
$ cmake ..
$ make
Inside the build directory, run the following command.
./spotifire
To make SpotiFire persistent, you can either run it at startup, or run it everytime you open Spotify (recommended) by modifying the command in the application file for Spotify.