test/functional/test_arrow.py

   1 #!/usr/bin/env python
   2 import sys; sys.path[:0] = ["../.."]
   3
   4 import pyx
   5 from pyx import *
   6 from pyx.path import *
   7 import math
   8
   9 def testarrow(c):
  10     c.stroke(path(moveto(10,20),
  11                 curveto(12,16,14,15,12,19),
  12                 rcurveto(-3,2,3,3,-2,4)),
  13              [deco.barrow.small, deco.earrow.normal,
  14               deco.arrow(pos=0.5),
  15               deco.arrow(pos=0.7, reversed=1)])
  16
  17     c.stroke(path(arc(8,15,4,10,70)), [deco.barrow.small, deco.earrow.normal])
  18     c.stroke(path(arc(8,15,3,10,70)), [deco.barrow.small, deco.earrow.normal])
  19     c.stroke(path(arc(8,15,2,10,70)), [deco.barrow.small, deco.earrow.normal])
  20     c.stroke(path(arc(8,15,1,10,70)), [deco.barrow.small, deco.earrow.normal])
  21     c.stroke(path(arc(8,15,0.5,10,70)), [deco.barrow.small, deco.earrow.normal])
  22
  23     base = 2
  24
  25     c.stroke(path(moveto(5,10), rlineto(5,0)),
  26            [#deco.barrow(size=base/math.sqrt(8)*unit.t_pt, constriction=1),
  27             deco.earrow.SMall,
  28             deco.text("start", arclenfrombegin=0, angle=90)])
  29     c.stroke(path(moveto(5,10.5), rlineto(5,0)),
  30            [deco.barrow(size=base/math.sqrt(4)*unit.t_pt, constriction=1),
  31             deco.earrow.Small,
  32             deco.text("start+1", arclenfrombegin=1, angle=90)])
  33     c.stroke(path(moveto(5,11), rlineto(5,0)),
  34            [deco.barrow(size=base/math.sqrt(2)*unit.t_pt, constriction=1),
  35             deco.earrow.small,
  36             deco.text("center", angle=90)])
  37     c.stroke(path(moveto(5,11.5), rlineto(5,0)),
  38            [deco.barrow(size=base/math.sqrt(1)*unit.t_pt, constriction=1),
  39             deco.earrow.normal,
  40             deco.text("end-1", arclenfromend=1, angle=90)])
  41     c.stroke(path(moveto(5,12), rlineto(5,0)),
  42            [deco.barrow(size=base*math.sqrt(2)*unit.t_pt, constriction=1),
  43             deco.earrow.large,
  44             deco.text("end", arclenfromend=0, angle=90)])
  45     c.stroke(path(moveto(5,12.5), rlineto(5,0)),
  46            [deco.barrow(size=base*math.sqrt(4)*unit.t_pt, constriction=1),
  47             deco.earrow.Large])
  48     c.stroke(path(moveto(5,13), rlineto(5,0)),
  49            [deco.barrow(size=base*math.sqrt(8)*unit.t_pt, constriction=1),
  50             deco.earrow.LArge])
  51     c.stroke(path(moveto(5,13.5), rlineto(5,0)),
  52            [deco.barrow(size=base*math.sqrt(16)*unit.t_pt, constriction=1),
  53             deco.earrow.LARge])
  54
  55     lt = style.linewidth.THick
  56
  57     c.stroke(path(moveto(11,10), rlineto(5,0)),
  58            [lt,
  59             deco.barrow(size=base/math.sqrt(8)*unit.t_pt, constriction=1),
  60             deco.earrow.SMall])
  61     c.stroke(path(moveto(11,10.5), rlineto(5,0)),
  62            [lt,
  63             deco.barrow(size=base/math.sqrt(4)*unit.t_pt, constriction=1),
  64             deco.earrow.Small])
  65     c.stroke(path(moveto(11,11), rlineto(5,0)),
  66            [lt,
  67             deco.barrow(size=base/math.sqrt(2)*unit.t_pt, constriction=1),
  68             deco.earrow.small])
  69     c.stroke(path(moveto(11,11.5), rlineto(5,0)),
  70            [lt,
  71             deco.barrow(size=base/math.sqrt(1)*unit.t_pt, constriction=1),
  72             deco.earrow.normal])
  73     c.stroke(path(moveto(11,12), rlineto(5,0)),
  74            [lt,
  75             deco.barrow(size=base*math.sqrt(2)*unit.t_pt, constriction=1),
  76             deco.earrow.large])
  77     c.stroke(path(moveto(11,12.5), rlineto(5,0)),
  78            [lt,
  79             deco.barrow(size=base*math.sqrt(4)*unit.t_pt, constriction=1),
  80             deco.earrow.Large(attrs=[deco.stroked([style.linestyle.dashed]), deco.filled.clear])])
  81     c.stroke(path(moveto(11,13), rlineto(5,0)),
  82            [lt,
  83             deco.barrow(size=base*math.sqrt(8)*unit.t_pt, constriction=1),
  84             deco.earrow.LArge(attrs=[style.linestyle.dashed, color.rgb.green])])
  85     c.stroke(path(moveto(11,13.5), rlineto(5,0)),
  86            [lt,
  87             deco.barrow(size=base*math.sqrt(16)*unit.t_pt, constriction=1),
  88             deco.earrow.LARge(attrs=[color.rgb.red,
  89                                      deco.stroked([style.linejoin.round]),
  90                                      deco.filled([color.rgb.blue])])])
  91
  92
  93 c=canvas.canvas()
  94 testarrow(c)
  95 c.writeEPSfile("test_arrow", paperformat=document.paperformat.A4, rotated=0, fittosize=1)
  96 c.writePDFfile("test_arrow", paperformat=document.paperformat.A4)
  97