2

I am running Ubuntu 16.04. I want to undecorate (remove borders and title bar) of a window. I found an old posted scripts on the net claimed to be working but it doesn't work now.

To undecorate:

xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x0, 0x0, 0x0"

To redecorate:

xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x1, 0x0, 0x0"

Though this python script works

#! /usr/bin/python2
import gtk.gdk
w = gtk.gdk.window_foreign_new( gtk.gdk.get_default_root_window().property_get("_NET_ACTIVE_WINDOW")[2][0] )
w.set_decorations( (w.get_decorations()+1)%2 ) # toggle between 0 and 1
gtk.gdk.window_process_all_updates()
gtk.gdk.flush()

How can I toggle window decoration from terminal without python?

3

This will not work in compiz! Compiz expects that _MOTIF_WM_HINTS property type is _MOTIF_WM_HINTS, but xprop command sets it to CARDINAL. If you use xprop | grep _MOTIF_WM_HINTS you will see this:

_MOTIF_WM_HINTS(CARDINAL) = 2, 0, 0, 0, 0

It should be like this:

_MOTIF_WM_HINTS(_MOTIF_WM_HINTS) = 2, 0, 0, 0, 0

Your python script works, because GTK+ properly sets this property. :)

  • Thank you for the answer. Would you post it as a whole liner? I got error with this xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS(_MOTIF_WM_HINTS) = 2, 0, 0, 0, 0 – kenn Jul 4 '17 at 12:13
  • You can not change property type! This might be fixed in compiz, see merge proposal. – muktupavels Jul 4 '17 at 12:23
  • And here is bug report. :) Subscribe to get notified when this gets fixed. – muktupavels Jul 4 '17 at 13:01
  • Do you know any way to undecorate a window with other tools such as wmctrl – kenn Jul 4 '17 at 16:03
  • No, I don't... But what are you trying to do? Should not be hard to write small command-line app that can toggle decorations. My fix most likely will be available in 16.04. :) – muktupavels Jul 4 '17 at 16:29

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