class pyglsPoiModule(poiModule):
"""
Maintains connection to the GLS server and requests information from there when necessary.
"""
def __init__(self, modules, parent):
print "Starting up module GPS location sharing (GLS) in background."
self._parent = parent
poiModule.__init__(self, modules)
if self._startup() == 0:
self.draw = True
else:
self.draw = False
def __del__(self):
"""
Setting local variable to "false" in order to notify threads about termination.
"""
self._up = 0
def _loadSettings(self):
"""
Loads all settings for the GLS module from a configuration file.
"""
config = ConfigParser.ConfigParser()
try:
config.read(FILENAME_GLSSETTINGS)
self._servername = config.get("pygls", "server")
self._port = int(config.get("pygls", "port"))
self._groupname = config.get("pygls", "group")
self._username = config.get("pygls", "user")
self._password = config.get("pygls", "password")
self._device = config.get("pygls", "device")
self._delay = int(config.get("pygls", "delay"))
self._forceRedraw = int(config.get("pygls", "forceredraw"))
if self._password.strip == "" or self._password == "None":
self._password = None
except:
print "Could not load settings for GLS module (%s)." %(FILENAME_GLSSETTINGS)
return -1
return 0
def _startup(self):
"""
Establishes the connection to the GLS server and sets up a continous download of position data.
A new thread is started that will perform updates on the GPS position data on a regular basis.
Applies its settings from a configuration file located in Setup/glssettings.txt
"""
if self._loadSettings() != 0:
return -1
self._s = ServerConnection(self._servername, self._port, PROTOCOL_VERSION, self._username , self._password, self._device , self._groupname)
self._group = poiGroup(self._groupname)
self.groups.append(self._group)
thread.start_new_thread(self._updatePositionsPeriodically, () )
self._up = 1
return 0
def _updatePositionsPeriodically(self):
""""
Initiates a pull of gps positions from the server periodically.
"""
while self._up:
self._loadPositionsFromServer()
if self._forceRedraw:
self._parent.forceRedraw()
time.sleep(self._delay)
def _loadPositionsFromServer(self):
"""
Performs a single download of all available positions on the server.
"""
## print "pyglsModule: Loading GLS positions from GLS server."
# clear last positions
del self._group.items[:]
try:
self._s.joinGroup(self._groupname)
posOthers = self._s.requestPositions()
self._s.closeConnection()
for pos in posOthers.keys():
## print "\t" + pos + ":" + str(posOthers[pos])
item = poi(posOthers[pos].getLatitude(), posOthers[pos].getLongitude())
item.title = "GLS:%s (OpenMoko)" %(pos)
self._group.items.append(item)
return posOthers
except pygls.GLSException.GLSException, e:
print "Connection error: " + e.getMsg() + "\n\t" + e.getLongMsg()
