manual/gradientname.py

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