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

   1 import gobject
   2 import location
   3 import thread
   4
   5 class LocationUpdater:
   6
   7     def __init__(self):
   8         self.lat = None
   9         self.long = None
  10
  11         self.control = location.GPSDControl.get_default()
  12         self.control.set_properties(preferred_method=location\
  13                                             .METHOD_USER_SELECTED,
  14                                     preferred_interval=location\
  15                                             .INTERVAL_DEFAULT)
  16         self.control.connect("error-verbose", self.on_error, self.control)
  17         self.control.connect("gpsd-stopped", self.stop, None)
  18
  19         self.device = location.GPSDevice()
  20         self.device.connect("changed", self.on_changed, self.control)
  21
  22     def update_location(self):
  23         """ Run the loop and update lat and long """
  24         self.reset()
  25         gobject.idle_add(self.start_location, self.control)
  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 horizontal accuracy is 1km
  38             if location.GPS_DEVICE_LATLONG_SET:
  39                 if device.fix[6] <= 100000:
  40                     self.lat, self.long = device.fix[4:6]
  41                     data.stop()
  42
  43     def stop(self, widget, data):
  44         """ Stop the location service """
  45         self.control.stop()
  46
  47     def start_location(self, data):
  48         """ Start the location service """
  49         data.start()
  50         return False
  51
  52     def reset(self):
  53         """ Reset coordinates """
  54         self.lat = None
  55         self.long = None
  56         self.device.reset_last_known()
  57