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#!/usr/bin/python
#
# examples/dpms.py -- DPMS usage examples.
#
# Copyright (C) 2020 Thiago Kenji Okada <thiagokokada@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.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
import random
import time
from Xlib import display
from Xlib.ext import dpms
class DPMSExamples(object):
def __init__(self):
self.d = display.Display()
capable = self.d.dpms_capable()
assert capable, 'DPMS is not supported in your system'
self.initial_info = self.d.dpms_info()
self.initial_timeouts = self.d.dpms_get_timeouts()
# Making sure that DPMS is enable for this examples
self.d.dpms_enable()
self.d.sync()
def print_dpms(self):
current_info = self.d.dpms_info()
print('\nDPMS state: {}\nPower level: {}'.format(current_info.state,
current_info.power_level))
current_timeouts = self.d.dpms_get_timeouts()
print('Standby: {}, Suspend: {}, Off: {}\n'.format(current_timeouts.standby_timeout,
current_timeouts.suspend_timeout,
current_timeouts.off_timeout))
def toggle_dpms(self):
current_info = self.d.dpms_info()
if current_info.state:
self.d.dpms_disable()
else:
self.d.dpms_enable()
self.d.sync()
def restore(self):
print('Restoring DPMS configuration')
self.d.dpms_set_timeouts(self.initial_timeouts.standby_timeout,
self.initial_timeouts.suspend_timeout,
self.initial_timeouts.off_timeout)
if self.initial_info.state:
self.d.dpms_enable()
else:
self.d.dpms_disable()
self.d.sync()
self.print_dpms()
def set_random_timeouts(self):
# Can be any number greater than 0
# Using 10 just to not turnoff the screen suddenly
standby_timeout = random.randint(10, 600)
# Shouldn't be smaller than standby_timeout
suspend_timeout = random.randint(standby_timeout, 600)
# Shouldn't be smaller than standby_timeout or suspend_timeout
off_timeout = random.randint(suspend_timeout, 600)
self.d.dpms_set_timeouts(standby_timeout, suspend_timeout, off_timeout)
self.d.sync()
def turn_off_display(self):
self.d.dpms_force_level(dpms.DPMSModeOff)
self.d.sync()
def turn_on_display(self):
self.d.dpms_force_level(dpms.DPMSModeOn)
self.d.sync()
def main():
try:
examples = DPMSExamples()
print('Initial state')
examples.print_dpms()
print('Setting random timeouts')
examples.set_random_timeouts()
examples.print_dpms()
print('The next example will turn-off your screen, press Ctrl-C to cancel.')
time.sleep(2)
examples.turn_off_display()
print('Turning it on again...')
time.sleep(2)
examples.turn_on_display()
print()
print('Toggle DPMS')
examples.toggle_dpms()
examples.print_dpms()
print('Toggle it again')
examples.toggle_dpms()
examples.print_dpms()
finally:
examples.restore()
if __name__ == '__main__':
main()
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