[GTK3] get background color of a textview

[Yann Leboulanger <asterix lagaule org>]

Hi,

I'm trying to get the background color of a textview. I use python / 
pygobject, but I don't think it's related to the language.

I tried doing that:

context = textview.get_style_context()
state = Gtk.StateFlags.NORMAL
color = context.get_background_color(state)

I tried all possible states, but none returns the correct background 
color (white in my case)

I precise that textview is already realized, this code is done in a 
callback.

Any idea how to get it?

Thanks in advance,
--
Yann