[gtk+] GtkNotebook: Fix a problem with tab states

[Matthias Clasen <matthiasc src gnome org>]

commit 64855f129579a632fc1a5deb217ab0a0c66039ec
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jan 4 13:01:49 2014 -0500

    GtkNotebook: Fix a problem with tab states
    
    When replacing the tab label, we were not adding the
    active-page style class. Fix that.

 gtk/gtknotebook.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index 9e0944b..e40d277 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -7805,6 +7805,10 @@ gtk_notebook_set_tab_label (GtkNotebook *notebook,
                         G_CALLBACK (gtk_notebook_mnemonic_activate_switch_page),
                         notebook);
 
+  if (priv->cur_page == page)
+    gtk_style_context_add_class (gtk_widget_get_style_context (page->tab_label),
+                                "active-page");
+
   if (priv->show_tabs && gtk_widget_get_visible (child))
     {
       gtk_widget_show (page->tab_label);