Using GTK on X windows (i.e. Linux, FreeBSD, Solaris), you can use the XEMBED protocol to embed widgets using gtk.Socket
. Unfortunately, the application that you're launching has to explicitly support it so that you can tell it to embed itself. Some applications don't support this. Notably, I can't find a way to do it with Firefox.
Nonetheless, here's a sample program that will run either an X terminal or an Emacs session inside a GTK window:
import os
import gtk
from gtk import Socket, Button, Window, VBox, HBox
w = Window()
e = Button("Emacs")
x = Button("XTerm")
s = Socket()
v = VBox()
h = HBox()
w.add(v)
v.add(s)
h.add(e)
h.add(x)
v.pack_start(h, expand=False)
def runemacs(btn):
x.set_sensitive(False); e.set_sensitive(False)
os.spawnlp(os.P_NOWAIT, "emacs",
"emacs", "--parent-id", str(s.get_id()))
def runxterm(btn):
x.set_sensitive(False); e.set_sensitive(False)
os.spawnlp(os.P_NOWAIT, "xterm",
"xterm", "-into", str(s.get_id()))
e.connect('clicked', runemacs)
x.connect('clicked', runxterm)
w.show_all()
gtk.main()