TrayViewport allocation fix for gtk3

1 files changed, 5 insertions, 4 deletions

diff --git a/src/sugar3/graphics/tray.py b/src/sugar3/graphics/tray.py
index 7911fce..9ed0466 100644
--- a/src/sugar3/graphics/tray.py
+++ b/src/sugar3/graphics/tray.py
@@ -76,14 +76,15 @@ class _TrayViewport(Gtk.Viewport):
         assert item in self.traybar.get_children()
 
         # Get the allocation, and make sure that it is visible
+        allocation = item.get_allocation()
         if self.orientation == Gtk.Orientation.HORIZONTAL:
             adj = self.get_hadjustment()
-            start = item.allocation.x
-            stop = item.allocation.x + item.allocation.width
+            start = allocation.x
+            stop = allocation.x + allocation.width
         else:
             adj = self.get_vadjustment()
-            start = item.allocation.y
-            stop = item.allocation.y + item.allocation.height
+            start = allocation.y
+            stop = allocation.y + allocation.height
 
         if start < adj.get_value():
             adj.set_value(start)