[gtk+/a11y] Avoid excessive child_changed::added emissions

[Matthias Clasen <matthiasc src gnome org>]

commit 0233a60670cfb16e1ba3b7299bdd87c9ac096057
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jun 30 22:12:31 2011 -0400

    Avoid excessive child_changed::added emissions
    
    We are listening to page-added and emit child_changed::added
    in response to that, so don't let the add_gtk handler add
    extraneous extra signal emissions. This fixes the child-handling
    test for GtkNotebook.

 gtk/a11y/gtknotebookaccessible.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gtk/a11y/gtknotebookaccessible.c b/gtk/a11y/gtknotebookaccessible.c
index ba40403..0b935b9 100644
--- a/gtk/a11y/gtknotebookaccessible.c
+++ b/gtk/a11y/gtknotebookaccessible.c
@@ -310,6 +310,8 @@ gtk_notebook_accessible_class_init (GtkNotebookAccessibleClass *klass)
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
   AtkObjectClass  *class = ATK_OBJECT_CLASS (klass);
   GailWidgetClass *widget_class = (GailWidgetClass*)klass;
+  GailContainerClass *container_class = (GailContainerClass*)klass;
+
 
   gobject_class->finalize = gtk_notebook_accessible_finalize;
 
@@ -317,6 +319,10 @@ gtk_notebook_accessible_class_init (GtkNotebookAccessibleClass *klass)
   class->initialize = gtk_notebook_accessible_initialize;
 
   widget_class->notify_gtk = gtk_notebook_accessible_notify_gtk;
+
+  /* we listen to page-added/-removed, so we don't care about these */
+  container_class->add_gtk = NULL;
+  container_class->remove_gtk = NULL;
 }
 
 static void