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

/*
 * Author :
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * Based on the GnomeDateEdit, part of the Gnome Library.
 * Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

/*
 * EDateEdit - a widget based on GnomeDateEdit to provide a date & optional
 * time field with popups for entering a date.
 *
 * It emits a "changed" signal when the date and/or time has changed.
 * You can check if the last date or time entered was invalid by
 * calling e_date_edit_date_is_valid() and e_date_edit_time_is_valid().
 *
 * Note that when the user types in a date or time, it will only emit the
 * signals when the user presses the return key or switches the keyboard
 * focus to another widget, or you call one of the _get_time/date functions.
 */

#ifndef E_DATE_EDIT_H
#define E_DATE_EDIT_H

#include <time.h>
#include <gtk/gtk.h>

/* Standard GObject macros */
#define E_TYPE_DATE_EDIT \
    (e_date_edit_get_type ())
#define E_DATE_EDIT(obj) \
    (G_TYPE_CHECK_INSTANCE_CAST \
    ((obj), E_TYPE_DATE_EDIT, EDateEdit))
#define E_DATE_EDIT_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_CAST \
    ((cls), E_TYPE_DATE_EDIT, EDateEditClass))
#define E_IS_DATE_EDIT(obj) \
    (G_TYPE_CHECK_INSTANCE_TYPE \
    ((obj), E_TYPE_DATE_EDIT))
#define E_IS_DATE_EDIT_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_TYPE \
    ((cls), E_TYPE_DATE_EDIT))
#define E_DATE_EDIT_GET_CLASS(obj) \
    (G_TYPE_INSTANCE_GET_CLASS \
    ((obj), E_TYPE_DATE_EDIT, EDateEditClass))

G_BEGIN_DECLS

typedef struct _EDateEdit EDateEdit;
typedef struct _EDateEditClass EDateEditClass;
typedef struct _EDateEditPrivate EDateEditPrivate;

/* The type of the callback function optionally used to get the current time.
 */
typedef struct tm   (*EDateEditGetTimeCallback)
                        (EDateEdit *dedit,
                         gpointer data);

struct _EDateEdit {
    GtkHBox hbox;
    EDateEditPrivate *priv;
};

struct _EDateEditClass {
    GtkHBoxClass parent_class;

    /* Signals */
    void        (*changed)      (EDateEdit *dedit);
};

GType       e_date_edit_get_type        (void);
GtkWidget * e_date_edit_new         (void);

/* Analogous to gtk_editable_set_editable.  disable editing, while still
 * allowing selection. */
void        e_date_edit_set_editable    (EDateEdit *dedit,
                         gboolean editable);

/* Returns TRUE if the last date and time set were valid. The date and time
 * are only set when the user hits Return or switches keyboard focus, or
 * selects a date or time from the popup. */
gboolean    e_date_edit_date_is_valid   (EDateEdit *dedit);
gboolean    e_date_edit_time_is_valid   (EDateEdit *dedit);

/* Returns the last valid date & time set, or -1 if the date & time was set to
 * 'None' and this is permitted via e_date_edit_set_allow_no_date_set. */
time_t      e_date_edit_get_time        (EDateEdit *dedit);
void        e_date_edit_set_time        (EDateEdit *dedit,
                         time_t the_time);

/* This returns the last valid date set, without the time. It returns TRUE
 * if a date is set, or FALSE if the date is set to 'None' and this is
 * permitted via e_date_edit_set_allow_no_date_set. (Month is 1 - 12). */
gboolean    e_date_edit_get_date        (EDateEdit *dedit,
                         gint *year,
                         gint *month,
                         gint *day);
void        e_date_edit_set_date        (EDateEdit *dedit,
                         gint year,
                         gint month,
                         gint day);

/* This returns the last valid time set, without the date. It returns TRUE
 * if a time is set, or FALSE if the time is set to 'None' and this is
 * permitted via e_date_edit_set_allow_no_date_set. */
gboolean    e_date_edit_get_time_of_day (EDateEdit *dedit,
                         gint *hour,
                         gint *minute);
/* Set the time. Pass -1 as hour to set to empty. */
void        e_date_edit_set_time_of_day (EDateEdit *dedit,
                         gint        hour,
                         gint        minute);

void        e_date_edit_set_date_and_time_of_day
                        (EDateEdit *dedit,
                         gint year,
                         gint month,
                         gint day,
                         gint hour,
                         gint minute);

/* Whether we show the date field. */
gboolean    e_date_edit_get_show_date   (EDateEdit *dedit);
void        e_date_edit_set_show_date   (EDateEdit *dedit,
                         gboolean show_date);

/* Whether we show the time field. */
gboolean    e_date_edit_get_show_time   (EDateEdit *dedit);
void        e_date_edit_set_show_time   (EDateEdit *dedit,
                         gboolean show_time);

/* The week start day, used in the date popup. 0 (Mon) to 6 (Sun). */
gint        e_date_edit_get_week_start_day  (EDateEdit *dedit);
void        e_date_edit_set_week_start_day  (EDateEdit *dedit,
                         gint week_start_day);

/* Whether we show week numbers in the date popup. */
gboolean    e_date_edit_get_show_week_numbers
                        (EDateEdit *dedit);
void        e_date_edit_set_show_week_numbers
                        (EDateEdit *dedit,
                         gboolean show_week_numbers);

/* Whether we use 24 hour format in the time field & popup. */
gboolean    e_date_edit_get_use_24_hour_format
                        (EDateEdit *dedit);
void        e_date_edit_set_use_24_hour_format
                        (EDateEdit *dedit,
                         gboolean use_24_hour_format);

/* Whether we allow the date to be set to 'None'. e_date_edit_get_time() will
 * return (time_t) -1 in this case. */
gboolean    e_date_edit_get_allow_no_date_set
                        (EDateEdit *dedit);
void        e_date_edit_set_allow_no_date_set
                        (EDateEdit *dedit,
                         gboolean allow_no_date_set);

/* The range of time to show in the time combo popup. */
void        e_date_edit_get_time_popup_range
                        (EDateEdit *dedit,
                         gint *lower_hour,
                         gint *upper_hour);
void        e_date_edit_set_time_popup_range
                        (EDateEdit *dedit,
                         gint lower_hour,
                         gint upper_hour);

/* Whether the time field is made insensitive rather than hiding it. */
gboolean    e_date_edit_get_make_time_insensitive
                        (EDateEdit *dedit);
void        e_date_edit_set_make_time_insensitive
                        (EDateEdit *dedit,
                         gboolean make_insensitive);

/* Whether two-digit years in date could be modified as in future; default is TRUE */
gboolean    e_date_edit_get_twodigit_year_can_future
                        (EDateEdit *dedit);
void        e_date_edit_set_twodigit_year_can_future
                        (EDateEdit *dedit,
                         gboolean value);

/* Sets a callback to use to get the current time. This is useful if the
 * application needs to use its own timezone data rather than rely on the
 * Unix timezone. */
void        e_date_edit_set_get_time_callback
                        (EDateEdit *dedit,
                         EDateEditGetTimeCallback cb,
                         gpointer data,
                         GDestroyNotify destroy);

GtkWidget * e_date_edit_get_entry       (EDateEdit *dedit);

G_END_DECLS

#endif /* E_DATE_EDIT_H */