/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 * Author :
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 2001, Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

/*
 * ETimezoneEntry - a field for setting a timezone. It shows the timezone in
 * a GtkEntry with a '...' button beside it which shows a dialog for changing
 * the timezone. The dialog contains a map of the world with a point for each
 * timezone, and an option menu as an alternative way of selecting the
 * timezone.
 */

#include <config.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkentry.h>
#include <gtk/gtksignal.h>
#include <gnome.h>
#include "dialogs/e-timezone-dialog.h"
#include "e-timezone-entry.h"


struct _ETimezoneEntryPrivate {
	GtkWidget *entry;
	GtkWidget *button;
};


enum {
  CHANGED,
  LAST_SIGNAL
};


static void e_timezone_entry_class_init	(ETimezoneEntryClass	*class);
static void e_timezone_entry_init	(ETimezoneEntry	*tentry);
static void e_timezone_entry_destroy	(GtkObject	*object);

static void on_entry_changed		(GtkEntry	*entry,
					 ETimezoneEntry *tentry);
static void on_button_clicked		(GtkWidget	*widget,
					 ETimezoneEntry	*tentry);


static GtkHBoxClass *parent_class;
static guint timezone_entry_signals[LAST_SIGNAL] = { 0 };


/**
 * e_timezone_entry_get_type:
 *
 * Returns the GtkType for the ETimezoneEntry widget
 */
guint
e_timezone_entry_get_type		(void)
{
	static guint timezone_entry_type = 0;

	if (!timezone_entry_type){
		GtkTypeInfo timezone_entry_info = {
			"ETimezoneEntry",
			sizeof (ETimezoneEntry),
			sizeof (ETimezoneEntryClass),
			(GtkClassInitFunc) e_timezone_entry_class_init,
			(GtkObjectInitFunc) e_timezone_entry_init,
			NULL,
			NULL,
		};

		timezone_entry_type = gtk_type_unique (gtk_hbox_get_type (), &timezone_entry_info);
	}
	
	return timezone_entry_type;
}


static void
e_timezone_entry_class_init		(ETimezoneEntryClass	*class)
{
	GtkObjectClass *object_class = (GtkObjectClass *) class;

	object_class = (GtkObjectClass*) class;

	parent_class = gtk_type_class (gtk_hbox_get_type ());

	timezone_entry_signals[CHANGED] =
		gtk_signal_new ("changed",
				GTK_RUN_LAST,
				object_class->type,
				GTK_SIGNAL_OFFSET (ETimezoneEntryClass,
						   changed),
				gtk_marshal_NONE__NONE,
				GTK_TYPE_NONE, 0);

	gtk_object_class_add_signals (object_class, timezone_entry_signals,
				      LAST_SIGNAL);

	object_class->destroy		= e_timezone_entry_destroy;

	class->changed = NULL;
}


static void
e_timezone_entry_init		(ETimezoneEntry	*tentry)
{
	ETimezoneEntryPrivate *priv;

	tentry->priv = priv = g_new0 (ETimezoneEntryPrivate, 1);

	priv->entry  = gtk_entry_new ();
	gtk_entry_set_editable (GTK_ENTRY (priv->entry), FALSE);
	/*gtk_widget_set_usize (priv->date_entry, 90, 0);*/
	gtk_box_pack_start (GTK_BOX (tentry), priv->entry, TRUE, TRUE, 0);
	gtk_widget_show (priv->entry);
	gtk_signal_connect (GTK_OBJECT (priv->entry), "changed",
			    GTK_SIGNAL_FUNC (on_entry_changed), tentry);
	
	priv->button = gtk_button_new_with_label ("...");
	gtk_signal_connect (GTK_OBJECT (priv->button), "clicked",
			    GTK_SIGNAL_FUNC (on_button_clicked), tentry);
	gtk_box_pack_start (GTK_BOX (tentry), priv->button, FALSE, FALSE, 0);
	gtk_widget_show (priv->button);
}


/**
 * e_timezone_entry_new:
 *
 * Description: Creates a new #ETimezoneEntry widget which can be used
 * to provide an easy to use way for entering dates and times.
 * 
 * Returns: a new #ETimezoneEntry widget.
 */
GtkWidget *
e_timezone_entry_new			(void)
{
	ETimezoneEntry *tentry;

	tentry = gtk_type_new (e_timezone_entry_get_type ());

	return GTK_WIDGET (tentry);
}


static void
e_timezone_entry_destroy		(GtkObject	*object)
{
	ETimezoneEntry *tentry;
	ETimezoneEntryPrivate *priv;

	g_return_if_fail (E_IS_TIMEZONE_ENTRY (object));

	tentry = E_TIMEZONE_ENTRY (object);
	priv = tentry->priv;

	g_free (tentry->priv);
	tentry->priv = NULL;

	if (GTK_OBJECT_CLASS (parent_class)->destroy)
		(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}


/* The arrow button beside the date field has been clicked, so we show the
   popup with the ECalendar in. */
static void
on_button_clicked		(GtkWidget	*widget,
				 ETimezoneEntry	*tentry)
{
	ETimezoneEntryPrivate *priv;
	ETimezoneDialog *timezone_dialog;
	GtkWidget *dialog;
	char *zone;

	priv = tentry->priv;

	timezone_dialog = e_timezone_dialog_new ();
	zone = e_timezone_entry_get_timezone (tentry);
	e_timezone_dialog_set_timezone (timezone_dialog, zone);

	dialog = e_timezone_dialog_get_toplevel (timezone_dialog);

	if (gnome_dialog_run_and_close (GNOME_DIALOG (dialog)) == 0) {
		zone = e_timezone_dialog_get_timezone (E_TIMEZONE_DIALOG (timezone_dialog));
		e_timezone_entry_set_timezone (tentry, zone);
	}

	gtk_object_unref (GTK_OBJECT (timezone_dialog));
}


static void
on_entry_changed			(GtkEntry	*entry,
					 ETimezoneEntry *tentry)
{
	gtk_signal_emit (GTK_OBJECT (tentry), timezone_entry_signals[CHANGED]);
}


char*
e_timezone_entry_get_timezone		(ETimezoneEntry	*tentry)
{
	g_return_val_if_fail (E_IS_TIMEZONE_ENTRY (tentry), NULL);

	return gtk_entry_get_text (GTK_ENTRY (tentry->priv->entry));
}


void
e_timezone_entry_set_timezone		(ETimezoneEntry	*tentry,
					 char		*timezone)
{
	g_return_if_fail (E_IS_TIMEZONE_ENTRY (tentry));

	gtk_entry_set_text (GTK_ENTRY (tentry->priv->entry), timezone);
}