added custom geom stuff to the group shape stuff

pptx/oxml/shapes/groupshape.py

@@ -83,7 +83,7 @@ def add_custom_geometry(self, id_, name, left, top, width, height):
         position and size.
         """
         sp = CT_Shape.new_custom_geometry_sp(id_, name, left, top, width, height)
-        self.insert_element_before(sp, 'p:extList')
+        self.insert_element_before(sp, 'p:extLst')
         return sp
 
     def add_groupshape(self, id_, name, x, y, cx, cy):

pptx/shapes/groupshape.py

@@ -170,6 +170,23 @@ def add_textbox(self, left, top, width, height):
         textbox = self._shape_factory(sp)
         return textbox
 
+    def add_custom_geometry(self, left, top, width, height):
+        """
+        Add a custom geometry shpane of specified size at specified position
+        on slide.
+        """
+        sp = self._add_cust_geom_sp(left, top, width, height)
+        cust_geom = self._shape_factory(sp)
+        return cust_geom
+
+    def add_groupshape(self, left, top, width, height):
+        """
+        Add groupshape of specified size at specified position on slide.
+        """
+        sp = self._add_groupshape_sp(left, top, width, height)
+        groupshape = self._shape_factory(sp)
+        return groupshape
+
     def clone_layout_placeholders(self, slide_layout):
         """
         Add placeholder shapes based on those in *slide_layout*. Z-order of
@@ -284,6 +301,24 @@ def _add_textbox_sp(self, x, y, cx, cy):
         sp = self._grpSp.add_textbox(id_, name, x, y, cx, cy)
         return sp
 
+    def _add_cust_geom_sp(self, x, y, cx, cy):
+        """
+        Return a newly-added custom geometry ``<p:sp>`` element
+        """
+        id_ = self._next_shape_id
+        name = 'CustGeom %s' % id_
+        sp = self._grpSp.add_custom_geometry(id_, name, x, y, cx, cy)
+        return sp
+
+    def _add_groupshape_sp(self, x, y, cx, cy):
+        """
+
+        """
+        id_ = self._next_shape_id
+        name = 'GroupShape %d' % (id_-1)
+        sp = self._grpSp.add_groupshape(id_, name, x, y, cx, cy)
+        return sp
+
     def _clone_layout_placeholder(self, layout_placeholder):
         """
         Add a new placeholder shape based on the slide layout placeholder