class GeoTracer:
def __init__(self):
self.geo = Geolocation(self.on_location, self.on_status)
self.updating = False
def _fix_read(self):
'''Intercept data read back from PpsFile to tweak the result value
so it's the expected string instead of bytes.'''
resp = self._f_read()
try:
value = resp[Geolocation._KEY_RES]
resp[Geolocation._KEY_RES] = value.decode()
except AttributeError:
pass
# print('data', resp)
return resp
def run(self, duration=60, period=1.0):
self.geo.open_connection()
# hotpatch the Geolocation's PpsFile object to fix the data read back
self._f_read = self.geo.f.read
self.geo.f.read = self._fix_read
try:
self.geo.start_location_updates(period)
start = time.time()
while time.time() - start < duration:
time.sleep(5)
if not self.updating:
print('waiting', self.geo.status_of_location_updates())
self.geo.cancel_location_updates()
finally:
self.geo.f.read = self._f_read # undo hotpatching
self.geo.close_connection()
def on_location(self, latitude, longitude, accuracy, altitude, altitude_accuracy, heading, speed, *args):
if not self.updating:
self.notify = qn.SimpleNotification('Geotrace: location found!',
showTimeFlag=True,
)
self.updating = True
used = len(list(x for x in args[-1] if x['used']))
tracked = len(list(x for x in args[-1] if x['tracked']))
satlist = ','.join(str(x['id']) for x in args[-1] if x['used'])
print('(%.6f, %.6f) acc=%5.1fm elev=%4.0fm heading=%3.0f speed=%4.1fm/s sats=%s/%s (%s)' % (latitude, longitude, accuracy, altitude, heading, speed, used, tracked, satlist))
sys.stdout.flush()
def on_status(self, status, *args):
print('status', status)
def __init__(self):
self.geo = Geolocation(self.on_location, self.on_status)
self.updating = False
