Better cleanup of circular references.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37267 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/wx/lib/ogl/_basic.py

@@ -288,9 +288,16 @@ class Shape(ShapeEvtHandler):
         return str(self.__class__).split(".")[-1][:-2]
 
     def Delete(self):
+        """
+        Fully disconnect this shape from parents, children, the
+        canvas, etc.
+        """
         if self._parent:
             self._parent.GetChildren().remove(self)
 
+        for child in self.GetChildren():
+            child.Delete()
+
         self.ClearText()
         self.ClearRegions()
         self.ClearAttachments()
@@ -3040,7 +3047,7 @@ class ShapeRegion(object):
             return None
         if self._penColour=="Invisible":
             return None
-        self._actualPenObject = wx.ThePenList.FindOrCreatePen(self._penColour, 1, self._penStyle)
+        self._actualPenObject = wx.Pen(self._penColour, 1, self._penStyle)
         return self._actualPenObject
 
     def SetText(self, s):