From f4c32488acf610b92aef7ed368d06cc634e46be5 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@walter-laptop.(none)>
Date: Tue, 26 Jan 2010 17:45:49 +0000
Subject: converting to overlay_shapes

---
diff --git a/TurtleArtActivity.py b/TurtleArtActivity.py
index d5b5ed2..18e6f82 100644
--- a/TurtleArtActivity.py
+++ b/TurtleArtActivity.py
@@ -418,18 +418,18 @@ class TurtleArtActivity(activity.Activity):
     """
     def _do_cartesian_cb(self, button):
         if self.tw.cartesian is True:
-            self.tw.cartesian_coordinates_spr.hide()
+            self.tw.overlay_shapes[0].hide()
             self.tw.cartesian = False
         else:
-            self.tw.cartesian_coordinates_spr.set_layer(OVERLAY_LAYER)
+            self.tw.overlay_shapes[0].set_layer(OVERLAY_LAYER)
             self.tw.cartesian = True
 
     def _do_polar_cb(self, button):
         if self.tw.polar is True:
-            self.tw.polar_coordinates_spr.hide()
+            self.tw.overlay_shapes[1].hide()
             self.tw.polar = False
         else:
-            self.tw.polar_coordinates_spr.set_layer(OVERLAY_LAYER)
+            self.tw.overlay_shapes[1].set_layer(OVERLAY_LAYER)
             self.tw.polar = True
 
     """
--
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