def _renderBackground(self, metric, z, x, y):
(polys, points) = self.countryService.getPolys(z, x, y)
clusterIds = set()
polysByName = {}
for pinfo in polys:
layer, shp, props = pinfo
if layer == 'countries':
polysByName[props['clusterId']] = shp
clusterIds.add(props['clusterId'])
else:
assert(layer == 'centroid_contours')
polysByName[props['clusterId'], int(props['contourNum'])] = shp
numContours = self.conf.getint('PreprocessingConstants', 'num_contours')
colors = Config.getFullColorWheel()
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, self.size, self.size)
context = cairo.Context(surface)
# First draw clusters
for i in clusterIds:
shp = polysByName[i]
c = metric.adjustCountryColor(colors[i][numContours], 0)
self._drawPoly(z, x, y, context, shp, c, (0.7, 0.7, 0.7))
for j in range(numContours):
if (i, j) in polysByName:
shp = polysByName[i, j]
c = metric.adjustCountryColor(colors[i][j], j + 1)
self._drawPoly(z, x, y, context, shp, c)
return surface
def __init__(self, conf):
self.fields = []
nc = conf.getint('PreprocessingConstants', 'num_contours')
self.colors = {}
self.colorCountries = True
for cid, ccolors in Config.getFullColorWheel().items():
self.colors[cid] = colour.Color(ccolors[nc - 1]).rgb
self.neutralColor = colour.Color("#777").rgb