face detection resets idle time and deactivates ss

[ozzloy@gmail.com/oble] / gss-poke.py

#! /usr/bin/env python
#inhibit then uninhibit gnome-screensaver.  this is a kludge for
#SimulateUserActivity
#Copyright 2010 Daniel Watson
'''
    use a camera to prevent screensaver
    Copyright (C) 2009  daniel watson, ozzloy@gmail.com

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
'''
'''
	 This file is part of oble.

	 oble is free software: you can redistribute it and/or modify
	 it under the terms of the GNU General Public License as published by
	 the Free Software Foundation, either version 3 of the License, or
	 (at your option) any later version.

	 oble 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 General Public License for more details.

	 You should have received a copy of the GNU General Public License
	 along with oble.  If not, see <http://www.gnu.org/licenses/>.

'''


 
import dbus
import dbus.glib
import sys
import time

def inhibit():
  try:
    bus = dbus.Bus(dbus.Bus.TYPE_SESSION)
    devobj = bus.get_object('org.gnome.ScreenSaver',  '/org/gnome/ScreenSaver')
    dev = dbus.Interface(devobj, "org.gnome.ScreenSaver")
    cookie = dev.Inhibit('gss-poke', 'SimulateUserActivity kludge')
    print "gnome screensaver inhibited."    
    return (dev, cookie)
  except Exception, e:
    print "could not send the dbus Inhibit signal: %s" % e
    return (False, False)

def uninhibit(dev, cookie):
  try:
    dev.UnInhibit(cookie)
    print "gnome screensaver enabled."
    return(True)  
  except Exception, e:
    print "could not send the dbus UnInhibit signal: %s" % e
    return (False)

if __name__ == '__main__':
  (dev, cookie) = inhibit()
  time.sleep(0.1)
  uninhibit(dev, cookie)
  sys.exit(0)