mirror of
https://github.com/mbusb/multibootusb
synced 2024-11-18 15:25:46 +00:00
151 lines
4.4 KiB
Python
151 lines
4.4 KiB
Python
# -*- coding: utf-8 -*-
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# Free Software Foundation; either version 2.1 of the License, or (at your
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# option) any later version.
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# This library is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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# for more details.
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# pylint: disable=anomalous-backslash-in-string
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"""pyudev.wx
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=========
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Wx integration.
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:class:`MonitorObserver` integrates device monitoring into the wxPython\_
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mainloop by turing device events into wx events.
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:mod:`wx` from wxPython\_ must be available when importing this module.
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.. _wxPython: http://wxpython.org/
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.. moduleauthor:: Tobias Eberle <tobias.eberle@gmx.de>
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.. versionadded:: 0.14
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"""
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from __future__ import (print_function, division, unicode_literals,
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absolute_import)
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from wx import EvtHandler, PostEvent
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from wx.lib.newevent import NewEvent
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import pyudev
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DeviceEvent, EVT_DEVICE_EVENT = NewEvent()
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class MonitorObserver(EvtHandler):
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"""
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An observer for device events integrating into the :mod:`wx` mainloop.
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This class inherits :class:`~wx.EvtHandler` to turn device events into
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wx events:
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>>> from pyudev import Context, Monitor
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>>> from pyudev.wx import MonitorObserver
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>>> context = Context()
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>>> monitor = Monitor.from_netlink(context)
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>>> monitor.filter_by(subsystem='input')
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>>> observer = MonitorObserver(monitor)
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>>> def device_event(event):
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... print('action {0} on device {1}'.format(event.device.action, event.device))
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>>> observer.Bind(EVT_DEVICE_EVENT, device_event)
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>>> monitor.start()
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This class is a child of :class:`wx.EvtHandler`.
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.. versionadded:: 0.17
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"""
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def __init__(self, monitor):
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EvtHandler.__init__(self)
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self.monitor = monitor
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self._observer_thread = None
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self.start()
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@property
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def enabled(self):
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"""
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Whether this observer is enabled or not.
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If ``True`` (the default), this observer is enabled, and emits events.
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Otherwise it is disabled and does not emit any events.
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"""
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return self._observer_thread is not None
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@enabled.setter
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def enabled(self, value):
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if value:
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self.start()
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else:
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self.stop()
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def start(self):
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"""
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Enable this observer.
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Do nothing, if the observer is already enabled.
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"""
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if self._observer_thread is not None:
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return
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self._observer_thread = pyudev.MonitorObserver(
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self.monitor, callback=self._emit_event,
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name='wx-observer-thread')
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self._observer_thread.start()
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def stop(self):
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"""
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Disable this observer.
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Do nothing, if the observer is already disabled.
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"""
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if self._observer_thread is None:
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return
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self._observer_thread.stop()
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def _emit_event(self, device):
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PostEvent(self, DeviceEvent(device=device))
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DeviceAddedEvent, EVT_DEVICE_ADDED = NewEvent()
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DeviceRemovedEvent, EVT_DEVICE_REMOVED = NewEvent()
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DeviceChangedEvent, EVT_DEVICE_CHANGED = NewEvent()
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DeviceMovedEvent, EVT_DEVICE_MOVED = NewEvent()
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class WxUDevMonitorObserver(MonitorObserver):
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"""An observer for device events integrating into the :mod:`wx` mainloop.
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.. deprecated:: 0.17
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Will be removed in 1.0. Use :class:`MonitorObserver` instead.
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"""
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_action_event_map = {
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'add': DeviceAddedEvent,
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'remove': DeviceRemovedEvent,
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'change': DeviceChangedEvent,
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'move': DeviceMovedEvent
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}
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def __init__(self, monitor):
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MonitorObserver.__init__(self, monitor)
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import warnings
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warnings.warn('Will be removed in 1.0. '
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'Use pyudev.wx.MonitorObserver instead.',
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DeprecationWarning)
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def _emit_event(self, device):
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PostEvent(self, DeviceEvent(action=device.action, device=device))
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event_class = self._action_event_map.get(device.action)
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if event_class is not None:
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PostEvent(self, event_class(device=device))
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