[gtk+] treeview: Tell accessible about focus column changes

[Benjamin Otte <otte src gnome org>]

commit a4559f1e19d10be801ac6e954d58b34a12ac2d4f
Author: Benjamin Otte <otte redhat com>
Date:   Sat Feb 11 01:59:19 2012 +0100

    treeview: Tell accessible about focus column changes

 gtk/a11y/gtktreeviewaccessible.c |    7 +++++++
 gtk/a11y/gtktreeviewaccessible.h |    4 ++++
 gtk/gtktreeview.c                |    9 +++++++++
 3 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/gtk/a11y/gtktreeviewaccessible.c b/gtk/a11y/gtktreeviewaccessible.c
index 4fca7fa..adb3a0b 100644
--- a/gtk/a11y/gtktreeviewaccessible.c
+++ b/gtk/a11y/gtktreeviewaccessible.c
@@ -2081,6 +2081,13 @@ _gtk_tree_view_accessible_toggle_visibility (GtkTreeView       *treeview,
 }
 
 void
+_gtk_tree_view_accessible_update_focus_column (GtkTreeView       *treeview,
+                                               GtkTreeViewColumn *old_focus,
+                                               GtkTreeViewColumn *new_focus)
+{
+}
+
+void
 _gtk_tree_view_accessible_add_state (GtkTreeView          *treeview,
                                      GtkRBTree            *tree,
                                      GtkRBNode            *node,
diff --git a/gtk/a11y/gtktreeviewaccessible.h b/gtk/a11y/gtktreeviewaccessible.h
index 58c75e8..7f953b4 100644
--- a/gtk/a11y/gtktreeviewaccessible.h
+++ b/gtk/a11y/gtktreeviewaccessible.h
@@ -74,6 +74,10 @@ void            _gtk_tree_view_accessible_reorder_column(GtkTreeView       *tree
 void            _gtk_tree_view_accessible_toggle_visibility
                                                         (GtkTreeView       *treeview,
                                                          GtkTreeViewColumn *column);
+void            _gtk_tree_view_accessible_update_focus_column
+                                                        (GtkTreeView       *treeview,
+                                                         GtkTreeViewColumn *old_focus,
+                                                         GtkTreeViewColumn *new_focus);
 
 void            _gtk_tree_view_accessible_add_state     (GtkTreeView       *treeview,
                                                          GtkRBTree         *tree,
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 96d9107..decf78b 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -10019,7 +10019,16 @@ void
 _gtk_tree_view_set_focus_column (GtkTreeView       *tree_view,
 				 GtkTreeViewColumn *column)
 {
+  GtkTreeViewColumn *old_column = tree_view->priv->focus_column;
+
+  if (old_column == column)
+    return;
+
   tree_view->priv->focus_column = column;
+
+  _gtk_tree_view_accessible_update_focus_column (tree_view, 
+                                                 old_column,
+                                                 column);
 }