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glib.py

# -*- coding: utf-8 -*-
# Copyright (C) 2010, 2011, 2012 Sebastian Wiesner <lunaryorn@googlemail.com>

# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation; either version 2.1 of the License, or (at your
# option) any later version.

# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
# for more details.

# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

"""
    pyudev.pygtk
    ============

Provide :class:`~pyudev.glib.GUDevMonitorObserver` to integrate a
    :class:`~pyudev.Monitor` into a :class:`glib.MainLoop`.

To use this module, :mod:`glib` and :mod:`gobject` from PyGObject_ must be
    available.  PyGtk is not required.

.. _PyGObject: http://www.pygtk.org/

.. moduleauthor::  Sebastian Wiesner  <lunaryorn@googlemail.com>
    .. versionadded:: 0.7
"""

from __future__ import (print_function, division, unicode_literals,
                        absolute_import)

# thanks to absolute imports, this really imports the glib binding and not this
# module again
import glib
import gobject

class GUDevMonitorObserver(gobject.GObject):
    """
    Observe a :class:`~pyudev.Monitor` and emit Glib signals upon device
    events:

>>> context = pyudev.Context()
    >>> monitor = pyudev.Monitor.from_netlink(context)
    >>> monitor.filter_by(subsystem='input')
    >>> observer = pyudev.pygtk.GUDevMonitorObserver(monitor)
    >>> def device_connected(observer, device):
    ...     print('{0!r} added'.format(device))
    >>> observer.connect('device-added', device_connected)
    >>> monitor.start()

This class is a child of :class:`gobject.GObject`.
    """

_action_signal_map = {
        'add': 'device-added', 'remove': 'device-removed',
        'change': 'device-changed', 'move': 'device-moved'}

__gsignals__ = {
        # explicitly convert the signal to str, because glib expects the
        # *native* string type of the corresponding python version as type of
        # signal name, and str() is the name of the native string type of both
        # python versions.  We could also remove the "unicode_literals" import,
        # but I don't want to make exceptions to the standard set of future
        # imports used throughout pyudev for the sake of consistency.
        str('device-event'): (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
                              (gobject.TYPE_STRING, gobject.TYPE_PYOBJECT)),
        str('device-added'): (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
                              (gobject.TYPE_PYOBJECT,)),
        str('device-removed'): (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
                                (gobject.TYPE_PYOBJECT,)),
        str('device-changed'): (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
                                (gobject.TYPE_PYOBJECT,)),
        str('device-moved'): (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
                              (gobject.TYPE_PYOBJECT,)),
        }

def __init__(self, monitor):
        gobject.GObject.__init__(self)
        self.monitor = monitor
        self.event_source = None
        self.enabled = True

@property
    def enabled(self):
        """
        Whether this observer is enabled or not.

If ``True`` (the default), this observer is enabled, and emits events.
        Otherwise it is disabled and does not emit any events.

.. versionadded:: 0.14
        """
        return self.event_source is not None

@enabled.setter
    def enabled(self, value):
        if value and self.event_source is None:
            self.event_source = glib.io_add_watch(
                self.monitor, glib.IO_IN, self._process_udev_event)
        elif not value and self.event_source is not None:
            glib.source_remove(self.event_source)

def _process_udev_event(self, source, condition):
        if condition == glib.IO_IN:
            event = self.monitor.receive_device()
            if event:
                action, device = event
                self.emit('device-event', action, device)
                self.emit(self._action_signal_map[action], device)
        return True

gobject.type_register(GUDevMonitorObserver)

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2020-11-05 11:57:57
..	dir	-	root/root	0755	2024-11-07 06:28:16
__init__.py	text/x-script.python	1.75 KB	root/root	0644	2012-03-01 05:19:57
__init__.pyc	text/x-bytecode.python	1.21 KB	root/root	0644	2017-08-03 05:51:25
__init__.pyo	text/x-bytecode.python	1.21 KB	root/root	0644	2017-08-03 05:51:25
_compat.py	text/x-script.python	1.44 KB	root/root	0644	2012-02-14 04:36:21
_compat.pyc	text/x-bytecode.python	1019 B	root/root	0644	2017-08-03 05:51:25
_compat.pyo	text/x-bytecode.python	1019 B	root/root	0644	2017-08-03 05:51:25
_libudev.py	text/x-script.python	9.9 KB	root/root	0644	2017-08-03 05:51:25
_libudev.pyc	text/x-bytecode.python	8.6 KB	root/root	0644	2017-08-03 05:51:25
_libudev.pyo	text/x-bytecode.python	8.6 KB	root/root	0644	2017-08-03 05:51:25
_py2util.py	text/x-script.python	1.32 KB	root/root	0644	2012-02-14 04:36:21
_py2util.pyc	text/x-bytecode.python	870 B	root/root	0644	2017-08-03 05:51:25
_py2util.pyo	text/x-bytecode.python	870 B	root/root	0644	2017-08-03 05:51:25
_py3util.py	text/x-script.python	1.19 KB	root/root	0644	2012-02-14 04:36:21
_py3util.pyc	text/x-bytecode.python	688 B	root/root	0644	2017-08-03 05:51:25
_py3util.pyo	text/x-bytecode.python	688 B	root/root	0644	2017-08-03 05:51:25
_qt_base.py	text/x-script.python	2.53 KB	root/root	0644	2012-02-14 04:36:21
_qt_base.pyc	text/x-bytecode.python	2.48 KB	root/root	0644	2017-08-03 05:51:25
_qt_base.pyo	text/x-bytecode.python	2.48 KB	root/root	0644	2017-08-03 05:51:25
_util.py	text/x-script.python	5.62 KB	root/root	0644	2017-08-03 05:51:25
_util.pyc	text/x-bytecode.python	5.3 KB	root/root	0644	2017-08-03 05:51:25
_util.pyo	text/x-bytecode.python	5.3 KB	root/root	0644	2017-08-03 05:51:25
core.py	text/x-script.python	13.66 KB	root/root	0644	2017-08-03 05:51:25
core.pyc	text/x-bytecode.python	14.9 KB	root/root	0644	2017-08-03 05:51:25
core.pyo	text/x-bytecode.python	14.9 KB	root/root	0644	2017-08-03 05:51:25
device.py	text/x-script.python	33.43 KB	root/root	0644	2017-08-03 05:51:25
device.pyc	text/x-bytecode.python	38.74 KB	root/root	0644	2017-08-03 05:51:25
device.pyo	text/x-bytecode.python	38.74 KB	root/root	0644	2017-08-03 05:51:25
glib.py	text/x-script.python	4.49 KB	root/root	0644	2012-02-14 04:36:21
glib.pyc	text/x-bytecode.python	3.42 KB	root/root	0644	2017-08-03 05:51:25
glib.pyo	text/x-bytecode.python	3.42 KB	root/root	0644	2017-08-03 05:51:25
monitor.py	text/x-script.python	16.91 KB	root/root	0644	2017-08-03 05:51:25
monitor.pyc	text/x-bytecode.python	17.17 KB	root/root	0644	2017-08-03 05:51:25
monitor.pyo	text/x-bytecode.python	17.17 KB	root/root	0644	2017-08-03 05:51:25
pyqt4.py	text/x-script.python	2.85 KB	root/root	0644	2012-02-14 04:36:21
pyqt4.pyc	text/x-bytecode.python	2.37 KB	root/root	0644	2017-08-03 05:51:25
pyqt4.pyo	text/x-bytecode.python	2.37 KB	root/root	0644	2017-08-03 05:51:25
pyside.py	text/x-script.python	2.83 KB	root/root	0644	2012-02-14 04:36:21
pyside.pyc	text/x-bytecode.python	2.38 KB	root/root	0644	2017-08-03 05:51:25
pyside.pyo	text/x-bytecode.python	2.38 KB	root/root	0644	2017-08-03 05:51:25
wx.py	text/x-script.python	3.44 KB	root/root	0644	2012-02-14 04:36:21
wx.pyc	text/x-bytecode.python	3.7 KB	root/root	0644	2017-08-03 05:51:25
wx.pyo	text/x-bytecode.python	3.7 KB	root/root	0644	2017-08-03 05:51:25