def __init__(self, renderer, cache_dir):
super(CustomMapLayer, self).__init__(renderer)
self.cache_dir = cache_dir
self.mercator = GlobalMercator()
self.tileloader = None
if self.tiles is not None:
map_envelope = self.m.envelope()
# map_envelope is in mercator projection, convert it to
# long/lat projection
envelope = renderer.merc_to_lnglat(map_envelope)
min_lon = envelope.minx
min_lat = envelope.miny
max_lon = envelope.maxx
max_lat = envelope.maxy
width = self.m.width
indexing = self.tiles.get('indexing')
max_zoom = self.tiles.get('maxZoom')
if indexing == 'google':
self.tileloader = GoogleTileLoader(min_lat, min_lon, max_lat,
max_lon, width, max_zoom)
elif indexing == 'tms':
self.tileloader = TMSTileLoader(min_lat, min_lon, max_lat,
max_lon, width, max_zoom)
elif indexing == 'f':
self.tileloader = FTileLoader(min_lat, min_lon, max_lat,
max_lon, width, max_zoom)
