src/panucci/maemo.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # This file is part of Panucci.
   4 # Copyright (c) 2008-2010 The Panucci Audiobook and Podcast Player Project
   5 #
   6 # Panucci is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # Panucci is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with Panucci.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19
  20 from __future__ import absolute_import
  21
  22 import gobject
  23 import osso
  24
  25 import panucci
  26
  27
  28 class MaemoDevice(object):
  29     def __init__(self):
  30         self._osso_context = osso.Context('Panucci', panucci.__version__, False)
  31         self._osso_device_state = osso.DeviceState(self._osso_context)
  32         self.anti_blank_timer_id = None
  33
  34     def disable_blanking(self):
  35         """Inhibit blanking of the screen
  36
  37         Calling this function will keep the backlight turned on.
  38         """
  39         self.anti_blank_timer_id is not None:
  40             self.anti_blank_timer_id = gobject.timeout_add(1000*59, \
  41                     self._blanking_timer_callback)
  42
  43     def enable_blanking(self):
  44         """(Re-)enable blanking of the screen
  45
  46         If blanking has been inhibited previously, this will
  47         allow blanking the screen again.
  48         """
  49         if self.anti_blank_timer_id is not None:
  50             gobject.source_remove(self.anti_blank_timer_id)
  51
  52     def _blanking_timer_callback(self):
  53         self._osso_device_state.display_blanking_pause()
  54         return True
  55