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# -*- coding: utf-8 -*- # Copyright (C) 2010, 2011 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.pyqt4 ============ Provide :class:`~pyudev.pyqt4.QUDevMonitorObserver` to integrate a :class:`~pyudev.Monitor` into the Qt event loop in applications using the PyQt4_ binding to Qt. To use this module, :mod:`PyQt4.QtCore` from PyQt4_ must be available. .. _PyQt4: http://riverbankcomputing.co.uk/software/pyqt/intro .. moduleauthor:: Sebastian Wiesner <lunaryorn@googlemail.com> """ from __future__ import (print_function, division, unicode_literals, absolute_import) from PyQt4.QtCore import QSocketNotifier, QObject, pyqtSignal from pyudev._qt_base import QUDevMonitorObserverMixin from pyudev.core import Device class QUDevMonitorObserver(QObject, QUDevMonitorObserverMixin): """ Observe a :class:`~pyudev.Monitor` and emit Qt signals upon device events: >>> context = pyudev.Context() >>> monitor = pyudev.Monitor.from_netlink(context) >>> monitor.filter_by(subsystem='input') >>> observer = pyudev.pyqt4.QUDevMonitorObserver(monitor) >>> def device_connected(device): ... print('{0!r} added'.format(device)) >>> observer.deviceAdded.connect(device_connected) >>> monitor.start() This class is a child of :class:`~PyQt4.QtCore.QObject`. """ #: emitted upon arbitrary device events deviceEvent = pyqtSignal(unicode, Device) #: emitted, if a device was added deviceAdded = pyqtSignal(Device) #: emitted, if a device was removed deviceRemoved = pyqtSignal(Device) #: emitted, if a device was changed deviceChanged = pyqtSignal(Device) #: emitted, if a device was moved deviceMoved = pyqtSignal(Device) def __init__(self, monitor, parent=None): """ Observe the given ``monitor`` (a :class:`~pyudev.Monitor`): ``parent`` is the parent :class:`~PyQt4.QtCore.QObject` of this object. It is passed unchanged to the inherited constructor of :class:`~PyQt4.QtCore.QObject`. """ QObject.__init__(self, parent) self._setup_notifier(monitor, QSocketNotifier)
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