Connect the Dots
This script converts the selected path into a connect the dots picture by replacing each vertex in the path with a dot and labeling it with a number. While it could certainly be improved, it serves as a simple example of accessing and altering path data and adding nodes to an svg document.
#!/usr/bin/env python
import sys,inkex
class Dots(inkex.Effect):
def effect(self):
for id, node in self.selected.iteritems():
if node.tagName == 'path':
a =[]
d = node.attributes.getNamedItem('d')
p = inkex.parsePath(d.value)
num = 1
for cmd,params in p:
a.append(['M',params[-2:]])
a.append(['L',params[-2:]])
self.addText(node,params[-2],params[-1],num)
num += 1
d.value = inkex.formatPath(a)
style = node.attributes.getNamedItem('style')
s = inkex.parseStyle(style.value)
s['stroke-linecap']='round'
s['stroke-width']='5px'
style.value = inkex.formatStyle(s)
def addText(self,node,x,y,text):
new = self.document.createElement('svg:text')
s = {'stroke-linejoin': 'miter', 'font-size': '20',
'stroke-width': '1.0px', 'stroke-opacity': '1.0',
'fill-opacity': '1.0', 'stroke': 'none', 'stroke-linecap': 'butt',
'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
new.setAttribute('style', inkex.formatStyle(s))
new.setAttribute('x', str(x))
new.setAttribute('y', str(y))
#TODO: prevent id collisions?
new.setAttribute('id', 'dots'+str(text))
new.appendChild(self.document.createTextNode(str(text)))
node.parentNode.appendChild(new)
e = Dots()
e.affect()
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