canvas: preserver drawing order in legacy backend

- closes #634
open-cogsci · Jul 19, 2018 · dedffce · dedffce
1 parent 2bd6c4e
commit dedffce
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/openexp/_canvas/legacy.py b/openexp/_canvas/legacy.py
@@ -22,6 +22,7 @@
 import os
 import pygame
 import platform
+from collections import OrderedDict
 from openexp.backend import configurable
 from openexp._canvas.canvas import Canvas
 from openexp._coordinates.legacy import Legacy as LegacyCoordinates
@@ -158,7 +159,7 @@ def copy(self, canvas):
 	def clear(self):
 
 		self.surface.fill(self.background_color.backend_color)
-		self._elements = {}
+		self._elements = OrderedDict()
 
 
 	def _text_size(self, text):