def addTopo(self, blxfile):
if self._topo == None:
self._topo = Topo(self.mapdir)
self._topo.addblx(blxfile, bigendian=self._bigendian)
class MapImage(object):
"""Map image suitable for use with a Magellan GPS. A MapImage object may contain several maps (Map objects).
>>> mi = MapImage("./test/images/canarias.imi")
>>> mi.open()
>>> len(mi.maps)
1
"""
def __init__(self, filename = None, mapdirobj = None, bigendian = False, maps = []):
self._filename = filename
if mapdirobj != None and not isinstance(mapdirobj, mapdir.MapDirectory):
raise ValueError("mapdirobj should be a MapDirectory object")
self.mapdir = mapdirobj
self._maps = list(maps)
self._bigendian = bigendian
self._topo = None
self.mode = None
@property
def topo(self): return self._topo
def addTopo(self, blxfile):
if self._topo == None:
self._topo = Topo(self.mapdir)
self._topo.addblx(blxfile, bigendian=self._bigendian)
def createMap(self, *args, **kvargs):
"""Create a new map and return the new Map object"""
if self.mode in ('a', 'w'):
m = Map(self.mapdir, mapnumber = len(self._maps), bigendian=self._bigendian, **kvargs)
m.open('w')
self._maps.append(m)
return self._maps[-1]
@property
def maps(self):
return tuple(self._maps)
def open(self, mode='r'):
self.mode = mode
if self.mapdir == None:
self.mapdir = mapdir.Image(self._filename, mode = mode)
if mode == 'w':
## Copy data files
for file in ["bmp2bit.ics", "bmp4bit.ics"]:
self.mapdir.copyfile(os.path.join(datadir, file))
elif mode in ('r', 'a'):
if self.mapdir.exists('add_maps.cfg'):
addmapscfg = self.mapdir.open('add_maps.cfg')
columns = re.split('\s+', addmapscfg.readline())
n = int(columns[0])
inifiles = columns[1:n+1]
hasmultiplemaps = True
else:
hasmultiplemaps = False
if self.mapdir.exists('lay_info.ini'):
inifiles = ['lay_info.ini']
else:
raise Exception('Could not find a layer ini file')
for inifile in inifiles:
m = Map(self.mapdir, bigendian=self._bigendian, inifile=inifile, hasmultiplemaps=hasmultiplemaps)
m.open(mode)
self._maps.append(m)
def writeconfig(self):
## Create add_maps.cfg
addmapscfg = self.mapdir.open('add_maps.cfg', 'w')
addmapscfg.write(cfg_writelist([m.inifilename for m in self._maps]) + '\n')
addmapscfg.close()
def close(self):
self.writeconfig()
## Close maps
for m in self._maps:
m.close()
## Write topo
if self._topo:
self._topo.write()
## Write image
self.mapdir.write()