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# PYX_COLOURS.PY
#
# The code in this file is part of Pyxplot
# <http://www.pyxplot.org.uk>
#
# Copyright (C) 2006-2012 Dominic Ford <coders@pyxplot.org.uk>
# 2008-2012 Ross Church
#
# $Id: pyx_colors.py 1261 2012-07-11 21:38:05Z dcf21 $
#
# Pyxplot is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# You should have received a copy of the GNU General Public License along with
# Pyxplot; if not, write to the Free Software Foundation, Inc., 51 Franklin
# Street, Fifth Floor, Boston, MA 02110-1301, USA
# ----------------------------------------------------------------------------
# This python produces figures showing all of the built-in colors defined in
# PyX
import pyx
from pyx import *
from math import *
# Fetch a list of all built-in colors defined in PyX
colors = [ i for i in pyx.color.cmyk.__dict__.keys() if isinstance(pyx.color.cmyk.__dict__[i],pyx.color.cmyk) ]
h_list = [ pyx.color.cmyk.__dict__[i].hsb().color['h']*2*pi for i in colors ]
s_list = [ pyx.color.cmyk.__dict__[i].hsb().color['s'] for i in colors ]
# Figure 1: Colors arranges in hue/saturation space
c = canvas.canvas()
outline = path.circle(0,0,7.5) # Draw the hue axis around the edge
c.stroke(outline)
item_list = []
for name,h,s in zip(colors,h_list,s_list): # Convert hue/saturation into x/y coordinates
x = s*sin(h)*7.5
y = s*cos(h)*7.5
item_list.append([x,y,name])
item_list.sort(lambda x,y: cmp(y[0],x[0])) # Draw from right-to-left
boxes = []
positions_l = [ [text.halign.boxleft , text.valign.top] , [text.halign.boxleft , text.valign.bottom] ]
positions_r = [ [text.halign.boxright, text.valign.top] , [text.halign.boxright, text.valign.bottom] ]
for x,y,name in item_list:
if x<0: positions2 = positions_l + positions_r
else : positions2 = positions_r + positions_l
for position in positions2:
textbox = c.texrunner.text(x, y, name, position)
collision = False
for item in boxes:
if textbox.bbox().intersects(item.bbox()): # If this color collides with one already drawn, try moving label
collision = True
continue
if not collision: break
if not collision:
shell = path.circle(x,y,0.2)
c.fill(shell, [ pyx.color.cmyk.__dict__[name] ]) # Draw a blob of the appropriate color
boxes.append(textbox)
else:
print name
for box in boxes: c.insert(box) # ... and then label it
c.writeEPSfile("pyx_colors.eps")
c.writePDFfile("pyx_colors.pdf")
# --------------
# Figure 2: A list of colors, sorted alphabetically
c = canvas.canvas()
colors2 = colors[:]
colors2.sort()
Clen = 20 # 20 colors in each column
for i in range(len(colors2)):
name = colors2[i]
y = - (i % Clen) * 0.5
x = int(i / Clen) * 3.5
shell = path.circle(x,y,0.2)
c.fill(shell, [ pyx.color.cmyk.__dict__[name] ])
c.text(x+0.5,y,name, [ text.halign.boxleft, text.valign.middle ] )
c.writeEPSfile("pyx_colors2.eps")
c.writePDFfile("pyx_colors2.pdf")
# ------------
# Figure 3: A list of colors, sorted by hue
c = canvas.canvas()
colors3 = zip(colors,h_list)
colors3.sort(lambda x,y: cmp(y[1],x[1]))
for i in range(len(colors3)):
name = colors3[i][0]
y = - (i % Clen) * 0.5
x = int(i / Clen) * 3.5
shell = path.circle(x,y,0.2)
c.fill(shell, [ pyx.color.cmyk.__dict__[name] ])
c.text(x+0.5,y,name, [ text.halign.boxleft, text.valign.middle ] )
c.writeEPSfile("pyx_colors3.eps")
c.writePDFfile("pyx_colors3.pdf")
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