adding extension: Interpolate Attribute in a Group

(bzr r7550)

2 files changed, 250 insertions, 0 deletions

diff --git a/share/extensions/interp-att-g.inx b/share/extensions/interp-att-g.inx
new file mode 100644
index 000000000..5ed2d1bc0
--- /dev/null
+++ b/share/extensions/interp-att-g.inx
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <_name>Interpolate Attribute in a group</_name>
+  <id>org.ekips.filter.interp-att-g</id>
+  <dependency type="executable" location="extensions">interp-att-g.py</dependency>
+  <dependency type="executable" location="extensions">inkex.py</dependency>
+  <_param name="intro" type="description">This effect applays a value for any interpolable attribute for all elements inside the selected group or for all elements in a multiple selection</_param>
+  <param name="att" type="enum" _gui-text="Attribute to Interpolate">
+    <_item value="width">Width</_item>
+    <_item value="height">Height</_item>
+    <_item value="scale">Scale</_item>
+    <_item value="trans-x">Translate X</_item>
+    <_item value="trans-y">Translate Y</_item>
+    <_item value="fill">Fill</_item>
+    <_item value="opacity">Opacity</_item>
+    <_item value="other">Other</_item>
+  </param>
+  <_param name="other-info" type="description">If you select "Other", you must know the SVG atributes to identify here this "other":</_param>
+  <param name="att-other" type="string" _gui-text="Other Attribute"></param>
+  <param name="att-other-type" type="enum" _gui-text="Other Attribute type">
+    <_item value="color">Color</_item>
+    <_item value="int">Interger Number</_item>
+    <_item value="float">Float Number</_item>
+  </param>
+  <param name="att-other-where" type="enum" _gui-text="Where to aply?">
+    <_item value="tag">Tag</_item>
+    <_item value="style">Style</_item>
+    <_item value="transform">Transformation</_item>
+  </param>
+  <_param name="val-info" type="description">••••••••••••••••••••••••••••••••••••••••••••••••</_param>
+  <param name="start-val" type="string" _gui-text="Start Value"></param>
+  <param name="end-val" type="string" _gui-text="End Value"></param>
+  <param name="unit" type="enum" _gui-text="Unit">
+    <_item value="none">No Unit</_item>
+    <_item value="color">Color</_item>
+    <item>px</item>
+    <item>pt</item>
+    <item>in</item>
+    <item>cm</item>
+    <item>mm</item>
+  </param>
+  <effect>
+    <object-type>all</object-type>
+    <effects-menu>
+      <submenu _name="Modify Path"/>
+    </effects-menu>
+  </effect>
+  <script>
+    <command reldir="extensions" interpreter="python">interp-att-g.py</command>
+  </script>
+</inkscape-extension>
diff --git a/share/extensions/interp-att-g.py b/share/extensions/interp-att-g.py
new file mode 100755
index 000000000..c8794f9ad
--- /dev/null
+++ b/share/extensions/interp-att-g.py
@@ -0,0 +1,199 @@
+#!/usr/bin/env python 
+'''
+Copyright (C) 2005 Aaron Spike, aaron@ekips.org
+
+This program 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.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+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
+'''
+import inkex, simplestyle, math, re, string
+
+class InterpAttG(inkex.Effect):
+
+    def __init__(self):
+        inkex.Effect.__init__(self)
+        self.OptionParser.add_option("-a", "--att",
+                        action="store", type="string",
+                        dest="att", default="fill",
+                        help="Attribute to be interpolated.")
+        self.OptionParser.add_option("-o", "--att-other",
+                        action="store", type="string",
+                        dest="att_other",
+                        help="Other atribute (for a limited UI).")
+        self.OptionParser.add_option("-t", "--att-other-type",
+                        action="store", type="string",
+                        dest="att_other_type",
+                        help="The other attribute type.")
+        self.OptionParser.add_option("-w", "--att-other-where",
+                        action="store", type="string",
+                        dest="att_other_where",
+                        help="That is a tag attribute or a style attribute?")
+        self.OptionParser.add_option("-s", "--start-val",
+                        action="store", type="string",
+                        dest="start_val", default="#F00",
+                        help="Initial interpolation value.")
+        self.OptionParser.add_option("-e", "--end-val",
+                        action="store", type="string",
+                        dest="end_val", default="#00F",
+                        help="End interpolation value.")
+        self.OptionParser.add_option("-u", "--unit",
+                        action="store", type="string",
+                        dest="unit", default="color",
+                        help="Values unit.")
+
+    def getColorValues(self):
+      sv = string.replace( self.options.start_val, '#', '' )
+      ev = string.replace( self.options.end_val, '#', '' )
+      if re.search('\s|,', sv):
+        # There are separators. That must be a integer RGB color definition.
+        sv = re.split( '[\s,]+', sv )
+        ev = re.split( '[\s,]+', ev )
+        self.R_ini = int( sv[0] )
+        self.G_ini = int( sv[1] )
+        self.B_ini = int( sv[2] )
+        self.R_end = int( ev[0] )
+        self.G_end = int( ev[1] )
+        self.B_end = int( ev[2] )
+      else:
+        # There is no separator. That must be a Hex RGB color definition.
+        if len(sv) == 3:
+          self.R_ini = int( sv[0] + sv[0], 16 )
+          self.G_ini = int( sv[1] + sv[1], 16 )
+          self.B_ini = int( sv[2] + sv[2], 16 )
+          self.R_end = int( ev[0] + ev[0], 16 )
+          self.G_end = int( ev[1] + ev[1], 16 )
+          self.B_end = int( ev[2] + ev[2], 16 )
+        else: #the len must be 6
+          self.R_ini = int( sv[0] + sv[1], 16 )
+          self.G_ini = int( sv[2] + sv[3], 16 )
+          self.B_ini = int( sv[4] + sv[5], 16 )
+          self.R_end = int( ev[0] + ev[1], 16 )
+          self.G_end = int( ev[2] + ev[3], 16 )
+          self.B_end = int( ev[4] + ev[5], 16 )
+      self.R_inc = ( self.R_end - self.R_ini ) / float( self.tot_el - 1 )
+      self.G_inc = ( self.G_end - self.G_ini ) / float( self.tot_el - 1 )
+      self.B_inc = ( self.B_end - self.B_ini ) / float( self.tot_el - 1 )
+      self.R_cur = self.R_ini
+      self.G_cur = self.G_ini
+      self.B_cur = self.B_ini
+
+    def getNumberValues(self):
+      sv = self.options.start_val
+      ev = self.options.end_val
+      if self.inte_att_type and self.inte_att_type != 'none':
+        sv = inkex.unittouu( sv + self.inte_att_type )
+        ev = inkex.unittouu( ev + self.inte_att_type )
+      self.val_cur = self.val_ini = sv
+      self.val_end = ev
+      self.val_inc = ( ev - sv ) / float( self.tot_el - 1 )
+
+    def getTotElements(self):
+      self.tot_el = 0
+      if len( self.selected ) > 1:
+        # multiple selection
+        self.collection = self.options.ids
+        for i in self.options.ids:
+          path = '//*[@id="%s"]' % i
+          self.collection[self.tot_el] = self.document.xpath(path, namespaces=inkex.NSS)[0]
+          self.tot_el += 1
+      else:
+        # must be a group
+        self.collection = self.selected[ self.options.ids[0] ]
+        for i in self.collection:
+          self.tot_el += 1
+
+    def effect(self):
+      if self.options.att == 'other':
+        self.inte_att = self.options.att_other
+        self.inte_att_type = self.options.att_other_type
+        self.where = self.options.att_other_where
+      else:
+        self.inte_att = self.options.att
+        if   self.inte_att == 'width':
+          self.inte_att_type = 'float'
+          self.where = 'tag'
+        elif self.inte_att == 'height':
+          self.inte_att_type = 'float'
+          self.where = 'tag'
+        elif self.inte_att == 'scale':
+          self.inte_att_type = 'float'
+          self.where = 'transform'
+        elif self.inte_att == 'trans-x':
+          self.inte_att_type = 'float'
+          self.where = 'transform'
+        elif self.inte_att == 'trans-y':
+          self.inte_att_type = 'float'
+          self.where = 'transform'
+        elif self.inte_att == 'fill':
+          self.inte_att_type = 'color'
+          self.where = 'style'
+        elif self.inte_att == 'opacity':
+          self.inte_att_type = 'float'
+          self.where = 'style'
+
+      self.getTotElements()
+
+      if self.inte_att_type == 'color':
+        self.getColorValues()
+      else:
+        self.getNumberValues()
+
+      #inkex.errormsg( 'R+: '+ str( self.R_inc ) )
+      #inkex.errormsg( 'G+: '+ str( self.G_inc ) )
+      #inkex.errormsg( 'B+: '+ str( self.B_inc ) )
+
+      for node in self.collection:
+        if self.inte_att_type == 'color':
+          val = 'rgb('+ \
+                  str(int(round(self.R_cur))) +','+ \
+                  str(int(round(self.G_cur))) +','+ \
+                  str(int(round(self.B_cur))) +')'
+        else:
+          if self.inte_att_type == 'float':
+            val = self.val_cur
+          else: # inte_att_type == 'int'
+            val = round(self.val_cur)
+
+        if self.where == 'style':
+          s = node.get('style')
+          re_find = '(^|;)'+ self.inte_att +':[^;]*(;|$)'
+          if re.search( re_find, s ):
+            s = re.sub( re_find, '\\1'+ self.inte_att +':'+ str(val) +'\\2', s )
+          else:
+            s += ';'+ self.inte_att +':'+ str(val)
+          node.set( 'style', s )
+        elif self.where == 'transform':
+          t = node.get('transform')
+          if t == None: t = ""
+          if self.inte_att == 'trans-x':
+            val = "translate("+ str(val) +",0)"
+          elif self.inte_att == 'trans-y':
+            val = "translate(0,"+ str(val) +")"
+          else:
+            val = self.inte_att + "("+ str(val) +")"
+          node.set( 'transform', t +" "+ val )
+        else: # self.where == 'tag':
+          node.set( self.inte_att, str(val) )
+
+        if self.inte_att_type == 'color':
+          self.R_cur += self.R_inc
+          self.G_cur += self.G_inc
+          self.B_cur += self.B_inc
+        else:
+          self.val_cur += self.val_inc
+
+if __name__ == '__main__':
+    e = InterpAttG()
+    e.affect()
+
+# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99