From 4cb33de1c1ac56189c1094ba414c021da7fd77a5 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Thu, 03 Nov 2011 17:00:42 +0000
Subject: fix problem with hide/restore for collapsed stacks (no more canvas layer to hide behind)

---
diff --git a/TurtleArt/sprites.py b/TurtleArt/sprites.py
index e3d6e6d..f4ca4b4 100644
--- a/TurtleArt/sprites.py
+++ b/TurtleArt/sprites.py
@@ -305,6 +305,10 @@ class Sprite:
         self.inval()
         self._sprites.remove_from_list(self)
 
+    def restore(self):
+        ''' Restore a hidden sprite '''
+        self.inval()
+
     def inval(self):
         ''' Invalidate a region for gtk '''
         # self._sprites.window.invalidate_rect(self.rect, False)
diff --git a/TurtleArt/tautils.py b/TurtleArt/tautils.py
index a47c063..9372576 100644
--- a/TurtleArt/tautils.py
+++ b/TurtleArt/tautils.py
@@ -491,6 +491,7 @@ def restore_stack(top):
             _dy += _newdy - _olddy
         else:
             if not _hit_bottom:
+                _blk.spr.restore()
                 _blk.spr.set_layer(BLOCK_LAYER)
                 _blk.status = None
             else:
@@ -575,6 +576,7 @@ def collapse_stack(top):
         else:
             if not _hit_bottom:
                 _blk.spr.set_layer(HIDE_LAYER)
+                _blk.spr.hide()
                 _blk.status = 'collapsed'
             else:
                 _blk.spr.move_relative((_dx, _dy))
--
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