From 1ba539b025ed3af5498966ea1c14e2431481ac99 Mon Sep 17 00:00:00 2001
From: Daniel Drake <dsd@laptop.org>
Date: Sun, 30 Oct 2011 11:01:34 +0000
Subject: Tray gtk3 fixes

---
diff --git a/src/sugar3/graphics/tray.py b/src/sugar3/graphics/tray.py
index f14569b..07bf3e2 100644
--- a/src/sugar3/graphics/tray.py
+++ b/src/sugar3/graphics/tray.py
@@ -130,11 +130,11 @@ class _TrayViewport(Gtk.Viewport):
             return self._can_scroll_prev
 
     def _size_allocate_cb(self, viewport, allocation):
-        bar_requisition = self.traybar.get_child_requisition()
+        bar_minimum, bar_natural = self.traybar.get_preferred_size()
         if self.orientation == Gtk.Orientation.HORIZONTAL:
-            scrollable = bar_requisition[0] > allocation.width
+            scrollable = bar_minimum.width > allocation.width
         else:
-            scrollable = bar_requisition[1] > allocation.height
+            scrollable = bar_minimum.height > allocation.height
 
         if scrollable != self._scrollable:
             self._scrollable = scrollable
--
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