git.maemo.org Git - gigfinder/blob - src/opt/gigfinder/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
  10         self.control = location.GPSDControl.get_default()
  11         self.control.set_properties(preferred_method=location\
  12                                             .METHOD_USER_SELECTED,
  13                                     preferred_interval=location\
  14                                             .INTERVAL_DEFAULT)
  15         self.control.connect("error-verbose", self.on_error, self.control)
  16         self.control.connect("gpsd-stopped", self.on_stop, None)
  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
  26     def on_error(self, control, error, data):
  27         """ Handle errors """
  28         print "location error: %d... quitting" % error
  29         data.quit()
  30
  31     def on_changed(self, device, data):
  32         """ Set long and lat """
  33         if not device:
  34             return
  35         if device.fix:
  36             # once fix is found and horizontal accuracy is 1km
  37             if location.GPS_DEVICE_LATLONG_SET:
  38                 if device.fix[6] <= 100000:
  39                     self.lat, self.long = device.fix[4:6]
  40                     data.stop()
  41
  42     def on_stop(self, control, data):
  43         """ Stop the location service """
  44         control.stop()
  45
  46     def start_location(self, data):
  47         """ Start the location service """
  48         data.start()
  49         return False
  50
  51     def reset(self):
  52         """ Reset coordinates """
  53         self.lat = None
  54         self.long = None
  55         self.device.reset_last_known()
  56