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# -*- test-case-name: twisted.internet.test -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
This module provides support for Twisted to interact with the glib/gtk2
mainloop.
In order to use this support, simply do the following::
from twisted.internet import gtk2reactor
gtk2reactor.install()
Then use twisted.internet APIs as usual. The other methods here are not
intended to be called directly.
"""
from incremental import Version
from ._deprecate import deprecatedGnomeReactor
deprecatedGnomeReactor("gtk2reactor", Version("Twisted", 23, 8, 0))
# System Imports
import sys
# Twisted Imports
from twisted.internet import _glibbase
from twisted.python import runtime
# Certain old versions of pygtk and gi crash if imported at the same
# time. This is a problem when running Twisted's unit tests, since they will
# attempt to run both gtk2 and gtk3/gi tests. However, gireactor makes sure
# that if we are in such an old version, and gireactor was imported,
# gtk2reactor will not be importable. So we don't *need* to enforce that here
# as well; whichever is imported first will still win. Moreover, additional
# enforcement in this module is unnecessary in modern versions, and downright
# problematic in certain versions where for some reason importing gtk also
# imports some subset of gi. So we do nothing here, relying on gireactor to
# prevent the crash.
try:
if not hasattr(sys, "frozen"):
# Don't want to check this for py2exe
import pygtk # type: ignore[import]
pygtk.require("2.0")
except (ImportError, AttributeError):
pass # maybe we're using pygtk before this hack existed.
import gobject # type: ignore[import]
if not hasattr(gobject, "IO_HUP"):
# gi.repository's legacy compatibility helper raises an AttributeError with
# a custom error message rather than a useful ImportError, so things tend
# to fail loudly. Things that import this module expect an ImportError if,
# well, something failed to import, and treat an AttributeError as an
# arbitrary application code failure, so we satisfy that expectation here.
raise ImportError("pygobject 2.x is not installed. Use the `gi` reactor.")
if hasattr(gobject, "threads_init"):
# recent versions of python-gtk expose this. python-gtk=2.4.1
# (wrapping glib-2.4.7) does. python-gtk=2.0.0 (wrapping
# glib-2.2.3) does not.
gobject.threads_init()
class Gtk2Reactor(_glibbase.GlibReactorBase):
"""
PyGTK+ 2 event loop reactor.
"""
def __init__(self, useGtk=True):
_gtk = None
if useGtk is True:
import gtk as _gtk # type: ignore[import]
_glibbase.GlibReactorBase.__init__(self, gobject, _gtk, useGtk=useGtk)
# We don't bother deprecating the PortableGtkReactor.
# The original code was removed and replaced with the
# backward compatible generic GTK reactor.
PortableGtkReactor = Gtk2Reactor
def install(useGtk=True):
"""
Configure the twisted mainloop to be run inside the gtk mainloop.
@param useGtk: should glib rather than GTK+ event loop be
used (this will be slightly faster but does not support GUI).
"""
reactor = Gtk2Reactor(useGtk)
from twisted.internet.main import installReactor
installReactor(reactor)
return reactor
def portableInstall(useGtk=True):
"""
Configure the twisted mainloop to be run inside the gtk mainloop.
"""
reactor = PortableGtkReactor()
from twisted.internet.main import installReactor
installReactor(reactor)
return reactor
if runtime.platform.getType() == "posix":
install = install
else:
install = portableInstall
__all__ = ["install"]
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