You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
3.4 KiB
Python
99 lines
3.4 KiB
Python
"""GUI support for the IPython ZeroMQ kernel - GTK toolkit support.
|
|
"""
|
|
# -----------------------------------------------------------------------------
|
|
# Copyright (C) 2010-2011 The IPython Development Team
|
|
#
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
# the file LICENSE, distributed as part of this software.
|
|
# -----------------------------------------------------------------------------
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Imports
|
|
# -----------------------------------------------------------------------------
|
|
# stdlib
|
|
import sys
|
|
import warnings
|
|
|
|
# Third-party
|
|
import gi
|
|
|
|
gi.require_version("Gdk", "3.0")
|
|
gi.require_version("Gtk", "3.0")
|
|
from gi.repository import GObject, Gtk # noqa: E402
|
|
|
|
warnings.warn(
|
|
"The Gtk3 event loop for ipykernel is deprecated", category=DeprecationWarning, stacklevel=2
|
|
)
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# Classes and functions
|
|
# -----------------------------------------------------------------------------
|
|
|
|
|
|
class GTKEmbed:
|
|
"""A class to embed a kernel into the GTK main event loop."""
|
|
|
|
def __init__(self, kernel):
|
|
"""Initialize the embed."""
|
|
self.kernel = kernel
|
|
# These two will later store the real gtk functions when we hijack them
|
|
self.gtk_main = None
|
|
self.gtk_main_quit = None
|
|
|
|
def start(self):
|
|
"""Starts the GTK main event loop and sets our kernel startup routine."""
|
|
# Register our function to initiate the kernel and start gtk
|
|
GObject.idle_add(self._wire_kernel)
|
|
Gtk.main()
|
|
|
|
def _wire_kernel(self):
|
|
"""Initializes the kernel inside GTK.
|
|
|
|
This is meant to run only once at startup, so it does its job and
|
|
returns False to ensure it doesn't get run again by GTK.
|
|
"""
|
|
self.gtk_main, self.gtk_main_quit = self._hijack_gtk()
|
|
GObject.timeout_add(int(1000 * self.kernel._poll_interval), self.iterate_kernel)
|
|
return False
|
|
|
|
def iterate_kernel(self):
|
|
"""Run one iteration of the kernel and return True.
|
|
|
|
GTK timer functions must return True to be called again, so we make the
|
|
call to :meth:`do_one_iteration` and then return True for GTK.
|
|
"""
|
|
self.kernel.do_one_iteration()
|
|
return True
|
|
|
|
def stop(self):
|
|
"""Stop the embed."""
|
|
# FIXME: this one isn't getting called because we have no reliable
|
|
# kernel shutdown. We need to fix that: once the kernel has a
|
|
# shutdown mechanism, it can call this.
|
|
if self.gtk_main_quit:
|
|
self.gtk_main_quit()
|
|
sys.exit()
|
|
|
|
def _hijack_gtk(self):
|
|
"""Hijack a few key functions in GTK for IPython integration.
|
|
|
|
Modifies pyGTK's main and main_quit with a dummy so user code does not
|
|
block IPython. This allows us to use %run to run arbitrary pygtk
|
|
scripts from a long-lived IPython session, and when they attempt to
|
|
start or stop
|
|
|
|
Returns
|
|
-------
|
|
The original functions that have been hijacked:
|
|
- Gtk.main
|
|
- Gtk.main_quit
|
|
"""
|
|
|
|
def dummy(*args, **kw):
|
|
"""No-op."""
|
|
|
|
# save and trap main and main_quit from gtk
|
|
orig_main, Gtk.main = Gtk.main, dummy
|
|
orig_main_quit, Gtk.main_quit = Gtk.main_quit, dummy
|
|
return orig_main, orig_main_quit
|