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index e8089ca055a1f92c03cb994d580cd1e3cbf5e05e..d19dde93166e144ca2a6a8653c90d629f191b632 100644 (file)
#!/usr/bin/env python
'''
+This extension module can measure arbitrary path and object length
+It adds a text to the selected path containing the length in a
+given unit.
+
+Copyright (C) 2006 Georg Wiora
Copyright (C) 2006 Nathan Hurst
Copyright (C) 2005 Aaron Spike, aaron@ekips.org
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+TODO:
+ * should use the standard attributes for text
+ * Implement option to keep text orientation upright
+ 1. Find text direction i.e. path tangent,
+ 2. check direction >90 or <-90 Degrees
+ 3. rotate by 180 degrees around text center
'''
-import inkex, simplestyle, simplepath,sys,cubicsuperpath, bezmisc
+import inkex, simplestyle, simplepath,sys,cubicsuperpath, bezmisc, locale
+# Set current system locale
+locale.setlocale(locale.LC_ALL, '')
def numsegs(csp):
- return sum([len(p)-1 for p in csp])
+ return sum([len(p)-1 for p in csp])
def interpcoord(v1,v2,p):
- return v1+((v2-v1)*p)
+ return v1+((v2-v1)*p)
def interppoints(p1,p2,p):
- return [interpcoord(p1[0],p2[0],p),interpcoord(p1[1],p2[1],p)]
+ return [interpcoord(p1[0],p2[0],p),interpcoord(p1[1],p2[1],p)]
def pointdistance((x1,y1),(x2,y2)):
- return math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
+ return math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
def bezlenapprx(sp1, sp2):
- return pointdistance(sp1[1], sp1[2]) + pointdistance(sp1[2], sp2[0]) + pointdistance(sp2[0], sp2[1])
+ return pointdistance(sp1[1], sp1[2]) + pointdistance(sp1[2], sp2[0]) + pointdistance(sp2[0], sp2[1])
def tpoint((x1,y1), (x2,y2), t = 0.5):
- return [x1+t*(x2-x1),y1+t*(y2-y1)]
+ return [x1+t*(x2-x1),y1+t*(y2-y1)]
def cspbezsplit(sp1, sp2, t = 0.5):
- m1=tpoint(sp1[1],sp1[2],t)
- m2=tpoint(sp1[2],sp2[0],t)
- m3=tpoint(sp2[0],sp2[1],t)
- m4=tpoint(m1,m2,t)
- m5=tpoint(m2,m3,t)
- m=tpoint(m4,m5,t)
- return [[sp1[0][:],sp1[1][:],m1], [m4,m,m5], [m3,sp2[1][:],sp2[2][:]]]
+ m1=tpoint(sp1[1],sp1[2],t)
+ m2=tpoint(sp1[2],sp2[0],t)
+ m3=tpoint(sp2[0],sp2[1],t)
+ m4=tpoint(m1,m2,t)
+ m5=tpoint(m2,m3,t)
+ m=tpoint(m4,m5,t)
+ return [[sp1[0][:],sp1[1][:],m1], [m4,m,m5], [m3,sp2[1][:],sp2[2][:]]]
def cspbezsplitatlength(sp1, sp2, l = 0.5, tolerance = 0.001):
- bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
- t = bezmisc.beziertatlength(bez, l, tolerance)
- return cspbezsplit(sp1, sp2, t)
+ bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
+ t = bezmisc.beziertatlength(bez, l, tolerance)
+ return cspbezsplit(sp1, sp2, t)
def cspseglength(sp1,sp2, tolerance = 0.001):
- bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
- return bezmisc.bezierlength(bez, tolerance)
+ bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
+ return bezmisc.bezierlength(bez, tolerance)
def csplength(csp):
- total = 0
- lengths = []
- for sp in csp:
- lengths.append([])
- for i in xrange(1,len(sp)):
- l = cspseglength(sp[i-1],sp[i])
- lengths[-1].append(l)
- total += l
- return lengths, total
+ total = 0
+ lengths = []
+ for sp in csp:
+ lengths.append([])
+ for i in xrange(1,len(sp)):
+ l = cspseglength(sp[i-1],sp[i])
+ lengths[-1].append(l)
+ total += l
+ return lengths, total
class Length(inkex.Effect):
- def __init__(self):
- inkex.Effect.__init__(self)
- self.OptionParser.add_option("-f", "--fontsize",
- action="store", type="string",
- dest="fontsize", default="20",
- help="Size of node label numbers")
- self.OptionParser.add_option("-o", "--offset",
- action="store", type="string",
- dest="offset", default="-4",
- help="The distance above the curve")
- def effect(self):
- for id, node in self.selected.iteritems():
- if node.tagName == 'path':
- self.group = self.document.createElement('svg:g')
- node.parentNode.appendChild(self.group)
-
- try:
- t = node.attributes.getNamedItem('transform').value
- self.group.setAttribute('transform', t)
- except AttributeError:
- pass
+ def __init__(self):
+ inkex.Effect.__init__(self)
+ self.OptionParser.add_option("-f", "--fontsize",
+ action="store", type="int",
+ dest="fontsize", default=20,
+ help="Size of length lable text in px")
+ self.OptionParser.add_option("-o", "--offset",
+ action="store", type="float",
+ dest="offset", default=-6,
+ help="The distance above the curve")
+ self.OptionParser.add_option("-u", "--unit",
+ action="store", type="string",
+ dest="unit", default="mm",
+ help="The unit of the measurement")
+ self.OptionParser.add_option("-p", "--precision",
+ action="store", type="int",
+ dest="precision", default=2,
+ help="Number of significant digits after decimal point")
+ self.OptionParser.add_option("-s", "--scale",
+ action="store", type="float",
+ dest="scale", default=1,
+ help="The distance above the curve")
+ self.OptionParser.add_option("-r", "--orient",
+ action="store", type="inkbool",
+ dest="orient", default=True,
+ help="Keep orientation of text upright")
+ self.OptionParser.add_option("--tab",
+ action="store", type="string",
+ dest="tab", default="sampling",
+ help="The selected UI-tab when OK was pressed")
+ self.OptionParser.add_option("--measurehelp",
+ action="store", type="string",
+ dest="measurehelp", default="",
+ help="dummy")
+
+ def effect(self):
+ # get number of digits
+ prec = int(self.options.precision)
+ # loop over all selected pathes
+ for id, node in self.selected.iteritems():
+ if node.tagName == 'path':
+ # self.group = self.document.createElement('svg:g')
+ self.group = self.document.createElement('svg:text')
+ node.parentNode.appendChild(self.group)
+
+ try:
+ t = node.attributes.getNamedItem('transform').value
+ self.group.setAttribute('transform', t)
+ except AttributeError:
+ pass
+
+ a =[]
+ p = cubicsuperpath.parsePath(node.attributes.getNamedItem('d').value)
+ num = 1
+ slengths, stotal = csplength(p)
+ ''' Wio: Umrechnung in unit '''
+ if self.options.unit=="mm":
+ factor=0.2822219 # px->mm
+ elif self.options.unit=="pt":
+ factor=0.80 # px->pt
+ elif self.options.unit=="cm":
+ factor=0.02822219 # px->cm
+ elif self.options.unit=="m":
+ factor=0.0002822219 # px->m
+ elif self.options.unit=="km":
+ factor=0.0000002822219 # px->km
+ elif self.options.unit=="in":
+ factor=0.2822219/25.4 # px->in
+ else :
+ ''' Default unit is px'''
+ factor=1
+ self.options.unit="px"
+
+ # Format the length as string
+ lenstr = locale.format("%(len)25."+str(prec)+"f",{'len':round(stotal*factor*self.options.scale,prec)}).strip()
+ self.addTextOnPath(self.group,0, 0,lenstr+' '+self.options.unit, id, self.options.offset)
- a =[]
- p = cubicsuperpath.parsePath(node.attributes.getNamedItem('d').value)
- num = 1
- slengths, stotal = csplength(p)
- self.addTextOnPath(self.group,0, 0,str(stotal), id, self.options.offset)
-
- def addTextOnPath(self,node,x,y,text, id,dy=0):
- new = self.document.createElement('svg:text')
- tp = self.document.createElement('svg:textPath')
- s = {'font-size': self.options.fontsize, 'fill-opacity': '1.0', 'stroke': 'none',
- 'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
- new.setAttribute('style', simplestyle.formatStyle(s))
- new.setAttribute('x', str(x))
- new.setAttribute('y', str(y))
- tp.setAttributeNS('http://www.w3.org/1999/xlink','xlink:href', '#'+id)
- tp.setAttribute('startOffset', "50%")
- #tp.setAttribute('dy', dy) # dubious merit
- new.appendChild(tp)
- tp.appendChild(self.document.createTextNode(str(text)))
- node.appendChild(new)
+ def addTextOnPath(self,node,x,y,text, id,dy=0):
+ #new = self.document.createElement('svg:text')
+ new = self.document.createElement('svg:textPath')
+ s = {'text-align': 'center', 'vertical-align': 'bottom',
+ 'text-anchor': 'middle', 'font-size': str(self.options.fontsize),
+ 'fill-opacity': '1.0', 'stroke': 'none',
+ 'font-weight': 'normal', 'font-style': 'normal', 'fill': '#000000'}
+ new.setAttribute('style', simplestyle.formatStyle(s))
+ node.setAttribute('x', str(x))
+ node.setAttribute('y', str(y))
+ #node.setAttribute('transform','rotate(180,'+str(-x)+','+str(-y)+')')
+ new.setAttributeNS('http://www.w3.org/1999/xlink','xlink:href', '#'+id)
+ new.setAttribute('startOffset', "50%")
+ new.setAttribute('dy', str(dy)) # dubious merit
+ #new.appendChild(tp)
+ new.appendChild(self.document.createTextNode(str(text)))
+ node.appendChild(new)
e = Length()
e.affect()