def render_graph(self, request_opts, graph_opts):
def label_fmt(x):
print "@@@", x
return str(x)
ld = len(graph_opts["data"])
palette = [Color(*x) for x in get_float_pallete(ld)]
w = graph_opts["width"]
h = graph_opts["height"]
drawing = Drawing(w, h)
# Legend
legend = LineLegend()
legend.colorNamePairs = [
(palette[i], graph_opts["data"][i].name)
for i in range(ld)
]
legend.boxAnchor = "sw"
legend.columnMaximum = 2
legend.alignment = "right"
drawing.add(legend)
lh = legend._calcHeight() + self.X_PADDING / 2
# Plot
lp = LinePlot()
lfs = lp.xValueAxis.labels.fontSize
lp.x = self.X_PADDING
lp.y = self.Y_PADDING + lh + lfs
lp.width = w - 2 * self.X_PADDING
lp.height = h - self.Y_PADDING - lp.y
lp.data = [
[(t, v) for v, t in ts] for ts in graph_opts["data"]
]
for i in range(ld):
lp.lines[i].strokeColor = palette[i]
drawing.add(lp)
# Render
cdata = drawing.asString(format="png")
response = self.render_plain_text(
cdata,
mimetype="image/png"
)
if not request_opts["noCache"]:
cache.set(request_opts["requestKey"], response,
request_opts["cacheTimeout"])
return response
