/usr/lib/python3/dist-packages/pyudev/_qt_base.py is in python3-pyudev 0.21.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | # -*- coding: utf-8 -*-
# Copyright (C) 2010, 2011, 2012, 2013 Sebastian Wiesner <lunaryorn@gmail.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._qt_base
===============
Base mixin class for Qt4,Qt5 support.
.. moduleauthor:: Sebastian Wiesner <lunaryorn@gmail.com>
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import six
from pyudev.device import Device
class MonitorObserverMixin(object):
"""
Base mixin for pyqt monitor observers.
"""
# pylint: disable=too-few-public-methods
def _setup_notifier(self, monitor, notifier_class):
self.monitor = monitor
self.notifier = notifier_class(
monitor.fileno(), notifier_class.Read, self)
self.notifier.activated[int].connect(self._process_udev_event)
@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. This merely
reflects the state of the ``enabled`` property of the underlying
:attr:`notifier`.
.. versionadded:: 0.14
"""
return self.notifier.isEnabled()
@enabled.setter
def enabled(self, value):
self.notifier.setEnabled(value)
def _process_udev_event(self):
"""
Attempt to receive a single device event from the monitor, process
the event and emit corresponding signals.
Called by ``QSocketNotifier``, if data is available on the udev
monitoring socket.
"""
device = self.monitor.poll(timeout=0)
if device is not None:
self._emit_event(device)
def _emit_event(self, device):
self.deviceEvent.emit(device)
class QUDevMonitorObserverMixin(MonitorObserverMixin):
"""
Obsolete monitor observer mixin.
"""
# pylint: disable=too-few-public-methods
def _setup_notifier(self, monitor, notifier_class):
MonitorObserverMixin._setup_notifier(self, monitor, notifier_class)
self._action_signal_map = {
'add': self.deviceAdded, 'remove': self.deviceRemoved,
'change': self.deviceChanged, 'move': self.deviceMoved,
}
import warnings
warnings.warn('Will be removed in 1.0. '
'Use pyudev.pyqt4.MonitorObserver instead.',
DeprecationWarning)
def _emit_event(self, device):
self.deviceEvent.emit(device.action, device)
signal = self._action_signal_map.get(device.action)
if signal is not None:
signal.emit(device)
def make_init(qobject, socket_notifier):
"""
Generates an initializer to observer the given ``monitor``
(a :class:`~pyudev.Monitor`):
``parent`` is the parent :class:`~PyQt{4,5}.QtCore.QObject` of this
object. It is passed unchanged to the inherited constructor of
:class:`~PyQt{4,5}.QtCore.QObject`.
"""
def __init__(self, monitor, parent=None):
qobject.__init__(self, parent)
# pylint: disable=protected-access
self._setup_notifier(monitor, socket_notifier)
return __init__
class MonitorObserverGenerator(object):
"""
Class to generate a MonitorObserver class.
"""
# pylint: disable=too-few-public-methods
@staticmethod
def make_monitor_observer(qobject, signal, socket_notifier):
"""Generates an observer for device events integrating into the
PyQt{4,5} mainloop.
This class inherits :class:`~PyQt{4,5}.QtCore.QObject` to turn device
events into Qt signals:
>>> from pyudev import Context, Monitor
>>> from pyudev.pyqt4 import MonitorObserver
>>> context = Context()
>>> monitor = Monitor.from_netlink(context)
>>> monitor.filter_by(subsystem='input')
>>> observer = MonitorObserver(monitor)
>>> def device_event(device):
... print('event {0} on device {1}'.format(device.action, device))
>>> observer.deviceEvent.connect(device_event)
>>> monitor.start()
This class is a child of :class:`~{PySide, PyQt{4,5}}.QtCore.QObject`.
"""
return type(
str("MonitorObserver"),
(qobject, MonitorObserverMixin),
{
str("__init__") : make_init(qobject, socket_notifier),
str("deviceEvent") : signal(Device)
}
)
class QUDevMonitorObserverGenerator(object):
"""
Class to generate a MonitorObserver class.
"""
# pylint: disable=too-few-public-methods
@staticmethod
def make_monitor_observer(qobject, signal, socket_notifier):
"""Generates an observer for device events integrating into the
PyQt{4,5} mainloop.
This class inherits :class:`~PyQt{4,5}.QtCore.QObject` to turn device
events into Qt signals:
>>> from pyudev import Context, Monitor
>>> from pyudev.pyqt4 import MonitorObserver
>>> context = Context()
>>> monitor = Monitor.from_netlink(context)
>>> monitor.filter_by(subsystem='input')
>>> observer = MonitorObserver(monitor)
>>> def device_event(device):
... print('event {0} on device {1}'.format(device.action, device))
>>> observer.deviceEvent.connect(device_event)
>>> monitor.start()
This class is a child of :class:`~{PyQt{4,5}, PySide}.QtCore.QObject`.
"""
return type(
str("QUDevMonitorObserver"),
(qobject, QUDevMonitorObserverMixin),
{
str("__init__") : make_init(qobject, socket_notifier),
#: emitted upon arbitrary device events
str("deviceEvent") : signal(six.text_type, Device),
#: emitted if a device was added
str("deviceAdded") : signal(Device),
#: emitted if a device was removed
str("deviceRemoved") : signal(Device),
#: emitted if a device was changed
str("deviceChanged") : signal(Device),
#: emitted if a device was moved
str("deviceMoved") : signal(Device)
}
)
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