/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 
 * e-optionmenu.c
 * Copyright 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>

#include <gtk/gtk.h>

#include "gal/util/e-util.h"

#include "e-option-menu.h"

static void e_option_menu_init       (EOptionMenu         *card);
static void e_option_menu_class_init (EOptionMenuClass    *klass);

static GtkOptionMenuClass *parent_class = NULL;

#define PARENT_TYPE (gtk_option_menu_get_type ())

E_MAKE_TYPE (e_option_menu,
	     "EOptionMenu",
	     EOptionMenu,
	     e_option_menu_class_init,
	     e_option_menu_init,
	     PARENT_TYPE)

static void
e_option_menu_class_init (EOptionMenuClass *klass)
{
	GtkObjectClass *object_class;
	GtkOptionMenuClass *optionmenu_class;

	object_class     = (GtkObjectClass*) klass;
	optionmenu_class = (GtkOptionMenuClass *) klass;

	parent_class = g_type_class_ref (PARENT_TYPE);

	E_OBJECT_CLASS_ADD_SIGNALS (object_class, signals, LAST_SIGNAL);
}

static void
e_option_menu_init (EOptionMenu *optionmenu)
{
	optionmenu->value = 0;
}

GtkWidget *
e_option_menu_new (const char *first_label, ...)
{
	va_list args;
	int i;
	const char *s;
	const char **labels;
	GtkWidget *widget;

	va_start (args, first_label);
	i = 0;
	for (s = first_label; s; s = va_arg (args, char *))
		i++;
	va_end (args);

	labels = g_new (const char *, i + 1);

	va_start (args, first_label);
	i = 0;
	for (s = first_label; s; s = va_arg (args, char *))
		labels[i++] = s;
	va_end (args);
	labels[i] = NULL;

	widget = e_option_menu_new_from_array (labels);

	g_free (labels);

	return widget;
}

GtkWidget *
e_option_menu_new_from_array (const char **labels)
{
	EOptionMenu *menu = g_object_new (E_OPTION_MENU_TYPE, NULL);
	e_option_menu_construct_from_array (menu, labels);
	return (GtkWidget *) menu;
}

GtkWidget *
e_option_menu_construct_from_array (EOptionMenu *option_menu, const char **labels)
{
	e_option_menu_set_strings_from_array (option_menu, labels);
	return (GtkWidget *) option_menu;
}

void
e_option_menu_set_strings (EOptionMenu *menu, const char *first_label, ...)
{
	va_list args;
	int i;
	const char *s;
	const char **labels;

	va_start (args, first_label);
	i = 0;
	for (s = first_label; s; s = va_arg (args, const char *))
		i++;
	va_end (args);

	labels = g_new (const char *, i + 1);

	va_start (args, first_label);
	i = 0;
	for (s = first_label; s; s = va_arg (args, const char *))
		labels[i++] = s;
	va_end (args);
	labels[i] = NULL;

	e_option_menu_set_strings_from_array (menu, labels);

	g_free (labels);
}

typedef struct {
	EOptionMenu *option_menu;
	int value;
} CallbackStruct;

static void
item_activated_cb (GtkWidget *widget, CallbackStruct *cb_struct)
{
	cb_struct->option_menu->value = cb_struct->value;
}

static void
item_destroyed_cb (gpointer data, GObject *where_object_was)
{
	CallbackStruct *cb_struct = data;
	g_free (cb_struct);
}

void
e_option_menu_set_strings_from_array (EOptionMenu *option_menu, const char **labels)
{
	GtkWidget *menu;
	int i;

	menu = gtk_menu_new ();
	if (labels) {
		for (i = 0; labels[i]; i++) {
			GtkWidget *menu_item;
			CallbackStruct *cb_struct;

			if (labels[i]) {
				menu_item = gtk_menu_item_new_with_label (labels[i]);

				cb_struct = g_new (CallbackStruct, 1);
				cb_struct->option_menu = option_menu;
				cb_struct->value = i;

				g_signal_connect (menu_item,
						  "activate",
						  G_CALLBACK (item_activated_cb),
						  cb_struct);
				g_object_weak_ref (G_OBJECT (menu_item),
						   item_destroyed_cb,
						   cb_struct);
			} else {
				menu_item = gtk_menu_item_new ();
				gtk_widget_set_sensitive (menu_item, FALSE);
			}


			gtk_widget_show (menu_item);
			gtk_menu_append (GTK_MENU (menu), menu_item);
		}
	}
	gtk_option_menu_remove_menu (GTK_OPTION_MENU (option_menu));
	gtk_option_menu_set_menu (GTK_OPTION_MENU (option_menu), menu);
}

gint
e_option_menu_get_value (EOptionMenu *menu)
{
	return menu->value;
}