import location as gps
import gobject

class myGPS():
    
    def __init__(self):
        try:
            self.boolLoop = False
            self.loop = gobject.MainLoop()
            
            self.control = gps.GPSDControl.get_default()
            self.device = gps.GPSDevice()
            self.control.set_properties(preferred_method=gps.METHOD_USER_SELECTED,
                                        preferred_interval=gps.INTERVAL_5S)
            
            self.control.connect("error-verbose", self.on_error, self.loop)
            self.device.connect("changed", self.on_changed, self.control)
            self.control.connect("gpsd-stopped", self.on_stop, self.loop)
            print "GPS object created"
        except Exception, err:
            print "Cannot Init:"
    
    def on_error(self, control, error, data):
        print ("location error: %d... quitting" % error)
        data.quit()
    
    def on_changed(self, device, data):
        if not device:
            return
        if device.fix:
            # get all the data needed from device.fix
            if device.fix[1] & gps.GPS_DEVICE_LATLONG_SET:
                print ("lat = %f, long = %f" % device.fix[4:6])
                print ("acc = %f" % device.fix[12])
    
    def on_stop(self, control, data):
        print "GPS stop"
    
    def start_location(self, data):
        data.start()
    
    def start(self):
        print "GPS start"
        if self.boolLoop:
            self.control.start()
        else:
            gobject.idle_add(self.start_location, self.control)
            self.loop.run()
            self.boolLoop = True
        
    def stop(self):
        self.control.stop()