git.maemo.org Git - gigfinder/blob - locator.py

   1 import gobject
   2 import location
   3
   4 class LocationUpdater:
   5
   6     def __init__(self):
   7         self.lat = None
   8         self.long = None
   9         self.loop = gobject.MainLoop()
  10         self.fix_count = 0
  11
  12         self.control = location.GPSDControl.get_default()
  13         self.control.set_properties(preferred_method=location.METHOD_USER_SELECTED,
  14                                preferred_interval=location.INTERVAL_DEFAULT)
  15         self.control.connect("error-verbose", self.on_error, self.loop)
  16         self.control.connect("gpsd-stopped", self.on_stop, self.loop)
  17
  18         self.device = location.GPSDevice()
  19         self.device.connect("changed", self.on_changed, self.control)
  20
  21     def update_location(self):
  22         """ Run the loop and update lat and long """
  23         self.reset()
  24         gobject.idle_add(self.start_location, self.control)
  25         self.loop.run()
  26
  27     def on_error(self, control, error, data):
  28         """ Handle errors """
  29         print "location error: %d... quitting" % error
  30         data.quit()
  31
  32     def on_changed(self, device, data):
  33         """ Set long and lat """
  34         if not device:
  35             return
  36         if device.fix:
  37             # once fix is found and long, lat available set long lat
  38             if device.fix[1] & location.GPS_DEVICE_LATLONG_SET:
  39                 self.fix_count += 1
  40                 if self.fix_count > 1:
  41                     self.lat, self.long = device.fix[4:6]
  42                     data.stop()
  43
  44     def on_stop(self, control, data):
  45         """ Stop the location service """
  46         print "quitting"
  47         data.quit()
  48
  49     def start_location(self, data):
  50         """ Start the location service """
  51         self.fix_count = 0
  52         data.start()
  53         return False
  54
  55     def reset(self):
  56         """ Reset coordinates """
  57         self.lat = None
  58         self.long = None
  59         self.device.reset_last_known()
  60