fixed clones in perspective to work with InkScape 1.1dev/1.2dev

extensions/fablabchemnitz/clonesperspective.py

@@ -11,27 +11,24 @@ class clonesPerspectiveEffect(inkex.EffectExtension):
         self.arg_parser.add_argument('--ratio', type = float, default = 0.9, help = 'Ratio of size of nearest neighbor to first.  Must be < 1')
 
     def effect(self):
-        svg = self.document.getroot()
-        num = int( self.options.num )
-        ratio = float( self.options.ratio)
-
-        if 1 != len(self.svg.selected) :
-            inkex.errormsg("Select exactly 1 thing. Group if necessary")
+        if len(self.svg.selected) != 1:
+            inkex.errormsg("Select exactly 1 thing. If necessary, group your items before.")
             sys.exit(1)
-        id = list(self.svg.selected.items())[0][0]
-        sel = self.svg.selected[id]
-        dic = sel.attrib
+        xpath = list(self.svg.selected.items())[0][0]
+        sel = self.svg.selected[xpath]
+        id = sel.get('id')
+
         try :
-            tx = dic[inkex.addNS('transform-center-x','inkscape') ]
-        except KeyError :
+            tx = sel.attrib[inkex.addNS('transform-center-x','inkscape')]
+        except KeyError:
             tx = '0.'
         try :
-            ty = dic[inkex.addNS('transform-center-y','inkscape') ]
-        except KeyError : 
+            ty = sel.attrib[inkex.addNS('transform-center-y','inkscape')]
+        except KeyError: 
             ty = '0.'
 
         if float(tx) == 0. and float(ty) == 0. :
-            inkex.errormsg("Center of rotation at center of object")
+            inkex.errormsg("Center of rotation ist at the center of object. Please move the center first.")
             sys.exit(1)
   
         bbox = sel.bounding_box()
@@ -47,10 +44,10 @@ class clonesPerspectiveEffect(inkex.EffectExtension):
 
         parent = sel.getparent()
         j = parent.index(sel)
-        for i in range(num) :
-            crat *= ratio
-            tx *= ratio
-            ty *= ratio
+        for i in range(self.options.num) :
+            crat *= self.options.ratio
+            tx *= self.options.ratio
+            ty *= self.options.ratio
             att = {
                 "id" : self.svg.get_unique_id("clone" + id),
                 inkex.addNS('href','xlink') : "#" + id,