[gnome-bluetooth/gnome-2-28] Fix build with GTK+ < 2.20

[Bastien Nocera <hadess src gnome org>]

commit 6c4f70fa864586dfda900c17f433b2b787685a30
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Dec 22 13:38:57 2009 +0000

    Fix build with GTK+ < 2.20
    
    gtk_dialog_get_widget_for_response () is only implemented
    in GTK+ 2.20. Fix the build for older versions.

 sendto/main.c |   39 ++++++++++++++++++++++++++++++++++++++-
 1 files changed, 38 insertions(+), 1 deletions(-)
---
diff --git a/sendto/main.c b/sendto/main.c
index e1476ff..da2314d 100644
--- a/sendto/main.c
+++ b/sendto/main.c
@@ -149,6 +149,43 @@ static gchar *format_time(gint seconds)
 				"approximately %'d hours", hours), hours);
 }
 
+typedef struct _ResponseData ResponseData;
+struct _ResponseData {
+	gint response_id;
+};
+
+static GtkWidget *
+get_widget_for_response (GtkDialog *dialog,
+			 int response_id)
+{
+	GList *children;
+	GList *tmp_list;
+
+	g_return_val_if_fail (GTK_IS_DIALOG (dialog), NULL);
+
+	children = gtk_container_get_children (GTK_CONTAINER (gtk_dialog_get_action_area (dialog)));
+
+	tmp_list = children;
+	while (tmp_list != NULL) {
+		GtkWidget *widget = tmp_list->data;
+		ResponseData *rd = g_object_get_data (G_OBJECT (widget),
+						      "gtk-dialog-response-data");
+
+		if (rd && rd->response_id == response_id) {
+			g_list_free (children);
+			return widget;
+		}
+
+		tmp_list = g_list_next (tmp_list);
+	}
+
+	g_list_free (children);
+
+	return NULL;
+
+
+}
+
 static void
 set_response_visible (GtkDialog *dialog,
 		      int response_id,
@@ -156,7 +193,7 @@ set_response_visible (GtkDialog *dialog,
 {
 	GtkWidget *widget;
 
-	widget = gtk_dialog_get_widget_for_response (dialog, response_id);
+	widget = get_widget_for_response (dialog, response_id);
 	gtk_widget_set_no_show_all (widget, TRUE);
 	gtk_widget_set_visible (widget, visible);
 }