Clutter-GTK seems broken

[jojva]

This python script should work, it doesn't:

from gi.repository import Clutter
from gi.repository import GtkClutter
from gi.repository import Gtk
import signal

def clicked_cb(action, actor):
    print "Not so bad"

if __name__=="__main__":
    GtkClutter.init(None)
    e = GtkClutter.Embed()
    b = Gtk.VBox()
    w = Gtk.Window()
    w.add(b)
    b.pack_start(e, True, True, 0)
    signal.signal(signal.SIGINT, signal.SIG_DFL)
    w.show_all()
    s = e.get_stage()
    a = Clutter.Actor()
    s.add_child(a)
    a.set_size(50, 50)
    a.set_position(50, 50)
    s.set_size(500, 500)
    a.set_background_color(Clutter.Color.new(200, 200, 200, 255))
    s.show_all()
    a.set_reactive(True)
    a.connect("button-press-event", clicked_cb)
    Gtk.main()

This makes using Pitivi impossible on Cinnamon (works fine with Gnome).

[MathieuDuponchelle]

This issue is very critical for Pitivi, as we use that kind of setup (actors in a GtkClutter.Embed). This means users can't click elements in the timeline, rendering Pitivi unusable with cinnamon.

[mtwebster]

This is a known issue, and a fairly high priority to get fixed prior to Cinnamon 2.2.

I'm fairly certain this is the same issue as:
#2307
and
#2830

[mtwebster]

btw, i really appreciate the test script :)

[jojva]

You can thank MathieuDuponchelle he's the author :)

[MathieuDuponchelle]

@mtwebster I hope it will help in fixing that issue, interestingly enough a simple actor in a clutter stage registers clicks correctly, the bug happens when a stage is embedded in a Gtk widget thanks to ClutterGtk. Maybe you can set milestones and labels to make this a blocker ? I think it's quite critical :)

[jojva]

Update here: for some reason, sudoing that script makes it work.

[mtwebster]

You'll have to update cinnamon-session as well as cinnamon.

prior to the fix, if you unset CLUTTER_DISABLE_XINPUT then run the script, it works fine. Turns out Clutter-Gtk needs xinput.

[jojva]

Any idea why I can't build Cinnamon?
I get this when running autogen:
"No package 'libcinnamon-menu-3.0' found"
I also tried autogening, making, and make-installing cinnamon-menus (and succeded) but it doesn't seem to change anything.
P.S. I'm on Fedora not LM.

[MathieuDuponchelle]

@mtwebster Thanks for your quick feedback :) We have updated our troubleshooting page from "Only solution is to not use cinnamon" to your solution :)

[lubosz]

@jojva your example works for me without unsetting CLUTTER_DISABLE_XINPUT

The reason I cannot run Pitivi in Cinnamon (or GNOME Classic or XFCE) is following Clutter related Bug:
https://bugzilla.gnome.org/show_bug.cgi?id=727851

Unsetting CLUTTER_DISABLE_XINPUT does not help.

Pitivi runs fine in GNOME Shell

[jojva]

@lubosz mtwebster's commit fixed the problem for me. I guess this is another issue.