How to find out which gui toolkit a window is using? GTK Qt ...?

[recent]

How can I find out, directly, the toolkit a window is using.

As an example, pavucontrol ... a pulse audio volume control window.

For example, is there something like xwininfo that would provide the toolkit info?

Debian 13.3 XFCE 4.20 X11

 

[nikNiz]

You can understand this by looking at the output of
ldd /path/program

 

[recent]

Thanks.

ldd `which pavucontrol` | grep -i 'gtk\|qt'

Are there other toolkits besides gtk and qt ?

List of widget toolkits - Wikipedia

en.wikipedia.org

 

[luca.stancapiano]

Tested it. That's ok!

 

[rado84]

How can I find out, directly, the toolkit a window is using.

As an example, pavucontrol ... a pulse audio volume control window.

For example, is there something like xwininfo that would provide the toolkit info?

Debian 13.3 XFCE 4.20 X11

Just look at the dependencies of the package. If you see gtk3/gtk4, then it's logical it's been written with either one of these two. If you see qt5/qt6, same logic.