[gtk+] Use suggested-action style

[Matthias Clasen <matthiasc src gnome org>]

commit 9347d27040b6d2d1b90dd63ecb8f097d75d5d3dd
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jan 26 10:41:26 2014 -0500

    Use suggested-action style
    
    When using header bars, make the default button in
    GtkDialog use the suggested-action style.

 gtk/gtkdialog.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkdialog.c b/gtk/gtkdialog.c
index b000daa..2d1f069 100644
--- a/gtk/gtkdialog.c
+++ b/gtk/gtkdialog.c
@@ -428,7 +428,10 @@ add_action_widgets (GtkDialog *dialog)
           g_object_unref (child);
 
           if (has_default)
-            gtk_widget_grab_default (child);
+            {
+              gtk_widget_grab_default (child);
+              gtk_style_context_add_class (gtk_widget_get_style_context (child), "suggested-action");
+            }
         }
       g_list_free (children);
     }
@@ -1104,7 +1107,11 @@ gtk_dialog_set_default_response (GtkDialog *dialog,
       ResponseData *rd = get_response_data (widget, FALSE);
 
       if (rd && rd->response_id == response_id)
-       gtk_widget_grab_default (widget);
+        {
+         gtk_widget_grab_default (widget);
+          if (dialog->priv->constructed && dialog->priv->use_header_bar == 1)
+            gtk_style_context_add_class (gtk_widget_get_style_context (widget), "suggested-action");
+        }
 
       tmp_list = g_list_next (tmp_list);
     }