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# -*- 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._qt_base =============== Base mixin class for Qt4 support. .. moduleauthor:: Sebastian Wiesner <lunaryorn@googlemail.com> """ from __future__ import (print_function, division, unicode_literals, absolute_import) class QUDevMonitorObserverMixin(object): 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) self._action_signal_map = { 'add': self.deviceAdded, 'remove': self.deviceRemoved, 'change': self.deviceChanged, 'move': self.deviceMoved, } @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. """ event = self.monitor.receive_device() if event: action, device = event self.deviceEvent.emit(action, device) self._action_signal_map[action].emit(device)
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