git.maemo.org Git - gc-dialer/blob - src/led_handler.py

   1 #!/usr/bin/env python
   2
   3 import dbus
   4
   5
   6 class _NokiaLedHandler(object):
   7
   8         def __init__(self):
   9                 self._bus = dbus.SystemBus()
  10                 self._rawMceRequest = self._bus.get_object("com.nokia.mce", "/com/nokia/mce/request")
  11                 self._mceRequest = dbus.Interface(self._rawMceRequest, dbus_interface="com.nokia.mce.request")
  12
  13                 self._ledPattern = "PatternCommunicationChat"
  14
  15         def on(self):
  16                 self._mceRequest.req_led_pattern_activate(self._ledPattern)
  17
  18         def off(self):
  19                 self._mceRequest.req_led_pattern_deactivate(self._ledPattern)
  20
  21
  22 class _NoLedHandler(object):
  23
  24         def __init__(self):
  25                 pass
  26
  27         def on(self):
  28                 pass
  29
  30         def off(self):
  31                 pass
  32
  33
  34 class LedHandler(object):
  35
  36         def __init__(self):
  37                 self._actual = None
  38                 self._isReal = False
  39
  40         def on(self):
  41                 self._lazy_init()
  42                 self._actual.on()
  43
  44         def off(self):
  45                 self._lazy_init()
  46                 self._actual.off()
  47
  48         @property
  49         def isReal(self):
  50                 self._lazy_init()
  51                 self._isReal
  52
  53         def _lazy_init(self):
  54                 if self._actual is not None:
  55                         return
  56                 try:
  57                         self._actual = _NokiaLedHandler()
  58                         self._isReal = True
  59                 except dbus.DBusException:
  60                         self._actual = _NoLedHandler()
  61                         self._isReal = False
  62
  63
  64 if __name__ == "__main__":
  65         leds = _NokiaLedHandler()
  66         leds.off()