[gtk+] treeview: Apply column-header region always

[Benjamin Otte <otte src gnome org>]

commit 1741de47dbd4ddb909012fb977f19bd1417fddea
Author: Benjamin Otte <otte redhat com>
Date:   Wed Sep 10 16:47:16 2014 +0200

    treeview: Apply column-header region always
    
    ... so that invisible columns get it, too.
    
    Works around weird effects seen when buttons are animated and columns
    get hidden/shown.

 gtk/gtktreeview.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 17c53be..9308028 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -8767,6 +8767,11 @@ gtk_tree_view_get_path_for_child (GtkContainer *container,
 
       if (gtk_tree_view_column_get_visible (column))
         visible_columns = g_list_prepend (visible_columns, column);
+      else if (gtk_tree_view_column_get_widget (column) == child ||
+               gtk_tree_view_column_get_button (column) == child)
+G_GNUC_BEGIN_IGNORE_DEPRECATIONS
+        gtk_widget_path_iter_add_region (path, gtk_widget_path_length (path) - 2, 
GTK_STYLE_REGION_COLUMN_HEADER, 0);
+G_GNUC_END_IGNORE_DEPRECATIONS
     }
 
   if (!rtl)