manual/gradientname.py

   1 #!/usr/bin/env python
   2 import sys, imp, re
   3 sys.path[:0] = [".."]
   4 import pyx
   5 from pyx import *
   6
   7 text.set(mode="latex")
   8 text.preamble(r"\renewcommand{\familydefault}{\ttdefault}")
   9
  10 c = canvas.canvas()
  11
  12 # data to be plotted
  13 pf = graph.data.paramfunction("k", 0, 1, "color, xmin, xmax, ymin, ymax= k, k, 1, 0, 1")
  14
  15 # positioning is quite ugly ... but it works at the moment
  16 y = 0
  17 dy = -0.65
  18
  19 # we could use gradient.__dict__ to get the instances, but we
  20 # would loose the ordering ... instead we just parse the file:
  21
  22 # see comment in colorname.py
  23
  24 p = re.compile("(?P<id>gradient\\.(?P<name>[a-z]+)) += [a-z]+gradient\\(.*\\)\n", re.IGNORECASE)
  25 lines = imp.find_module("color", pyx.__path__)[0].readlines()
  26 firstgraph = None
  27 for line in lines: # we yet don't use a file iterator
  28     m = p.match(line)
  29     if m:
  30         if firstgraph is None:
  31             xaxis = graph.axis.lin(
  32                 parter=graph.axis.parter.lin(tickdists=["0.5","0.1"], labeldists=["1"]),
  33                 painter=graph.axis.painter.regular(
  34                     innerticklength=None,
  35                     outerticklength=graph.axis.painter.ticklength.normal),
  36                 linkpainter=graph.axis.painter.regular(innerticklength=None, labelattrs=None))
  37             firstgraph = g = graph.graphxy(ypos=y, width=10, height=0.5, x2=xaxis, y=graph.axis.lin(parter=None))
  38         else:
  39             g = graph.graphxy(ypos=y, width=10, height=0.5, x2=graph.axis.linkedaxis(firstgraph.axes["x2"]), y=graph.axis.lin(parter=None))
  40         g.plot(pf, [graph.style.rect(getattr(pyx.color.gradient, m.group("name")))])
  41         g.dodata()
  42         g.finish()
  43         c.insert(g)
  44         c.text(10.2, y + 0.15, m.group("id"), [text.size.footnotesize])
  45         y += dy
  46
  47
  48 c.writeEPSfile("gradientname")
  49 c.writePDFfile("gradientname")