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eventthread.py
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#!/usr/bin/env python
#
# examples/eventthread.py -- Tests multithreaded event handling
#
# Copyright (C) 2010-2011 Outpost Embedded, LLC
# Forest Bond <forest.bond@rapidrollout.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.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
# Python 2/3 compatibility.
from __future__ import print_function
import sys
import os
# Change path so we find Xlib
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
import time
from threading import Thread
from Xlib import Xatom, threaded
from Xlib.display import Display
class EventThread(Thread):
display = None
_stop = None
def __init__(self, display):
super(EventThread, self).__init__()
self.display = display
self.daemon = True
def run(self):
while True:
event = self.display.next_event()
print('event: %r' % event)
def main(argv):
display = Display()
thread = EventThread(display)
thread.start()
time.sleep(1)
screen = display.screen()
# The get_property call should not deadlock, despite the blocking next_event
# call in the thread.
atom = display.intern_atom('_XROOTPMAP_ID', True)
response = screen.root.get_property(atom, Xatom.PIXMAP, 0, 1)
print('get_property response: %r' % response)
display.close()
if __name__ == '__main__':
sys.exit(main(sys.argv))