share/extensions/dots.py

   1 #!/usr/bin/env python
   2 '''
   3 Copyright (C) 2005 Aaron Spike, aaron@ekips.org
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 '''
  19 import inkex, simplestyle, simplepath, math
  20
  21 class Dots(inkex.Effect):
  22
  23     def __init__(self):
  24         inkex.Effect.__init__(self)
  25         self.OptionParser.add_option("-d", "--dotsize",
  26                         action="store", type="string",
  27                         dest="dotsize", default="10px",
  28                         help="Size of the dots placed at path nodes")
  29         self.OptionParser.add_option("-f", "--fontsize",
  30                         action="store", type="string",
  31                         dest="fontsize", default="20",
  32                         help="Size of node label numbers")
  33
  34
  35     def separateLastAndFirst(self, p):
  36         # Separate the last and first dot if they are togheter
  37         lastDot = -1
  38         if p[lastDot][1] == []: lastDot = -2
  39         if round(p[lastDot][1][-2]) == round(p[0][1][-2]) and \
  40                 round(p[lastDot][1][-1]) == round(p[0][1][-1]):
  41                 x1 = p[lastDot][1][-2]
  42                 y1 = p[lastDot][1][-1]
  43                 x2 = p[lastDot-1][1][-2]
  44                 y2 = p[lastDot-1][1][-1]
  45                 dx = abs( max(x1,x2) - min(x1,x2) )
  46                 dy = abs( max(y1,y2) - min(y1,y2) )
  47                 dist = math.sqrt( dx**2 + dy**2 )
  48                 x = dx/dist
  49                 y = dy/dist
  50                 if x1 > x2: x *= -1
  51                 if y1 > y2: y *= -1
  52                 p[lastDot][1][-2] += x * inkex.unittouu(self.options.dotsize)
  53                 p[lastDot][1][-1] += y * inkex.unittouu(self.options.dotsize)
  54
  55
  56     def effect(self):
  57         for id, node in self.selected.iteritems():
  58             if node.tag == inkex.addNS('path','svg'):
  59                 self.group = inkex.etree.SubElement( node.getparent(), inkex.addNS('g','svg') )
  60                 self.dotGroup = inkex.etree.SubElement( self.group, inkex.addNS('g','svg') )
  61                 self.numGroup = inkex.etree.SubElement( self.group, inkex.addNS('g','svg') )
  62
  63                 try:
  64                     t = node.get('transform')
  65                     self.group.set('transform', t)
  66                 except:
  67                     pass
  68
  69                 style = simplestyle.formatStyle({ 'stroke': 'none', 'fill': '#000' })
  70                 a = []
  71                 p = simplepath.parsePath(node.get('d'))
  72
  73                 self.separateLastAndFirst(p)
  74
  75                 num = 1
  76                 for cmd,params in p:
  77                     if cmd != 'Z' and cmd != 'z':
  78                         dot_att = {
  79                           'style': style,
  80                           'r':  str( inkex.unittouu(self.options.dotsize) / 2 ),
  81                           'cx': str( params[-2] ),
  82                           'cy': str( params[-1] )
  83                         }
  84                         inkex.etree.SubElement(
  85                           self.dotGroup,
  86                           inkex.addNS('circle','svg'),
  87                           dot_att )
  88                         self.addText(
  89                           self.numGroup,
  90                           params[-2] + ( inkex.unittouu(self.options.dotsize) / 2 ),
  91                           params[-1] - ( inkex.unittouu(self.options.dotsize) / 2 ),
  92                           num )
  93                         num += 1
  94                 node.getparent().remove( node )
  95
  96
  97     def addText(self,node,x,y,text):
  98                 new = inkex.etree.SubElement(node,inkex.addNS('text','svg'))
  99                 s = {'font-size': self.options.fontsize, 'fill-opacity': '1.0', 'stroke': 'none',
 100                     'font-weight': 'normal', 'font-style': 'normal', 'fill': '#999'}
 101                 new.set('style', simplestyle.formatStyle(s))
 102                 new.set('x', str(x))
 103                 new.set('y', str(y))
 104                 new.text = str(text)
 105
 106 if __name__ == '__main__':
 107     e = Dots()
 108     e.affect()
 109
 110
 111 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99