path: root/widgets/misc/e-cell-date-edit.c

/* -*- 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
 */

/*
 * ECellDateEdit - a subclass of ECellPopup used to show a date with a popup
 * window to edit it.
 */

#include <config.h>
#include <gal/util/e-i18n.h>
#include <gdk/gdkkeysyms.h>
#include "gal/util/e-util.h"
#include <gal/e-table/e-table-item.h>
#include "e-cell-date-edit.h"

/* This depends on ECalendar which is why I didn't put it in gal. */
#include "e-calendar.h"

static void e_cell_date_edit_class_init     (GtkObjectClass *object_class);
static void e_cell_date_edit_init       (ECellDateEdit  *ecde);
static void e_cell_date_edit_destroy        (GtkObject  *object);

static gint e_cell_date_edit_do_popup       (ECellPopup *ecp,
                         GdkEvent   *event);
static void e_cell_date_edit_show_popup     (ECellDateEdit  *ecde);
static void e_cell_date_edit_get_popup_pos  (ECellDateEdit  *ecde,
                         gint       *x,
                         gint       *y,
                         gint       *height,
                         gint       *width);

static void e_cell_date_edit_rebuild_time_list  (ECellDateEdit  *ecde);

static int e_cell_date_edit_key_press       (GtkWidget  *popup_window,
                         GdkEventKey    *event,
                         ECellDateEdit  *ecde);

static ECellPopupClass *parent_class;


E_MAKE_TYPE (e_cell_date_edit, "ECellDateEdit", ECellDateEdit,
         e_cell_date_edit_class_init, e_cell_date_edit_init,
         e_cell_popup_get_type());


static void
e_cell_date_edit_class_init     (GtkObjectClass *object_class)
{
    ECellPopupClass *ecpc = (ECellPopupClass *) object_class;

    object_class->destroy = e_cell_date_edit_destroy;

    ecpc->popup = e_cell_date_edit_do_popup;

    parent_class = gtk_type_class (e_cell_popup_get_type ());
}


static void
e_cell_date_edit_init           (ECellDateEdit  *ecde)
{
    GtkWidget *frame, *vbox, *table, *label, *entry;
    GtkWidget *calendar, *scrolled_window, *list, *bbox;
    GtkWidget *now_button, *today_button, *none_button;

    ecde->use_24_hour_format = TRUE;

    ecde->lower_hour = 0;
    ecde->upper_hour = 24;

    /* We create one popup window for the ECell, since there will only
       ever be one popup in use at a time. */
    ecde->popup_window = gtk_window_new (GTK_WINDOW_POPUP);

    gtk_window_set_policy (GTK_WINDOW (ecde->popup_window),
                   TRUE, TRUE, FALSE);
  
    frame = gtk_frame_new (NULL);
    gtk_container_add (GTK_CONTAINER (ecde->popup_window), frame);
    gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
    gtk_widget_show (frame);

    vbox = gtk_vbox_new (FALSE, 0);
    gtk_container_add (GTK_CONTAINER (frame), vbox);
        gtk_widget_show (vbox);

    table = gtk_table_new (3, 2, FALSE);
    gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0);
    gtk_table_set_col_spacings (GTK_TABLE (table), 4);
        gtk_widget_show (table);

#if 0
    label = gtk_label_new (_("Date:"));
    gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
    gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
              GTK_FILL, 0, 0, 0);
    gtk_widget_show (label);

    entry = gtk_entry_new ();
    gtk_table_attach (GTK_TABLE (table), entry, 0, 1, 1, 2,
              GTK_FILL, 0, 0, 0);
    gtk_widget_show (entry);
#endif

    calendar = e_calendar_new ();
    gnome_canvas_item_set (GNOME_CANVAS_ITEM (E_CALENDAR (calendar)->calitem),
                   "move_selection_when_moving", FALSE,
                   NULL);
    gtk_table_attach (GTK_TABLE (table), calendar, 0, 1, 0, 3,
              GTK_FILL, GTK_FILL, 0, 0);
    gtk_widget_show (calendar);


#if 0
    label = gtk_label_new (_("Time:"));
    gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
    gtk_table_attach (GTK_TABLE (table), label, 1, 2, 0, 1,
              GTK_FILL, 0, 0, 0);
    gtk_widget_show (label);

    entry = gtk_entry_new ();
    gtk_table_attach (GTK_TABLE (table), entry, 1, 2, 0, 1,
              GTK_FILL, 0, 0, 0);
    gtk_widget_show (entry);
#endif

    scrolled_window = gtk_scrolled_window_new (NULL, NULL);
    gtk_table_attach (GTK_TABLE (table), scrolled_window, 1, 2, 0, 3,
              GTK_FILL, GTK_FILL, 0, 0);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
                    GTK_POLICY_NEVER,
                    GTK_POLICY_ALWAYS);
    gtk_widget_show (scrolled_window);

    list = gtk_list_new ();
    gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_window), list);
    gtk_container_set_focus_vadjustment (GTK_CONTAINER (list),
                         gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (scrolled_window)));
    gtk_widget_show (list);
    ecde->time_list = list;
    e_cell_date_edit_rebuild_time_list (ecde);

    bbox = gtk_hbutton_box_new ();
    gtk_container_set_border_width (GTK_CONTAINER (bbox), 4);
    gtk_button_box_set_spacing (GTK_BUTTON_BOX (bbox), 2);
    gtk_button_box_set_child_ipadding (GTK_BUTTON_BOX (bbox), 2, 0);
    gtk_button_box_set_child_size (GTK_BUTTON_BOX (bbox), 0, 0);
    gtk_box_pack_start (GTK_BOX (vbox), bbox, FALSE, FALSE, 0);
        gtk_widget_show (bbox);

    now_button = gtk_button_new_with_label (_("Now"));
    gtk_container_add (GTK_CONTAINER (bbox), now_button);
        gtk_widget_show (now_button);
#if 0
    gtk_signal_connect (GTK_OBJECT (now_button), "clicked",
                GTK_SIGNAL_FUNC (on_date_popup_now_button_clicked), dedit);
#endif

    today_button = gtk_button_new_with_label (_("Today"));
    gtk_container_add (GTK_CONTAINER (bbox), today_button);
        gtk_widget_show (today_button);
#if 0
    gtk_signal_connect (GTK_OBJECT (today_button), "clicked",
                GTK_SIGNAL_FUNC (on_date_popup_today_button_clicked), dedit);
#endif

    /* Note that we don't show this here, since by default a 'None' date
       is not permitted. */
    none_button = gtk_button_new_with_label (_("None"));
    gtk_container_add (GTK_CONTAINER (bbox), none_button);
#if 0
    gtk_signal_connect (GTK_OBJECT (none_button), "clicked",
                GTK_SIGNAL_FUNC (on_date_popup_none_button_clicked), dedit);
#endif



    gtk_signal_connect (GTK_OBJECT (ecde->popup_window),
                "key_press_event",
                GTK_SIGNAL_FUNC (e_cell_date_edit_key_press),
                ecde);
}


/**
 * e_cell_date_edit_new:
 *
 * Creates a new ECellDateEdit renderer.
 *
 * Returns: an ECellDateEdit object.
 */
ECell *
e_cell_date_edit_new            (void)
{
    ECellDateEdit *ecde = gtk_type_new (e_cell_date_edit_get_type ());

    return (ECell*) ecde;
}


/*
 * GtkObject::destroy method
 */
static void
e_cell_date_edit_destroy        (GtkObject *object)
{
    ECellDateEdit *ecde = E_CELL_DATE_EDIT (object);

    gtk_widget_unref (ecde->popup_window);

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


static gint
e_cell_date_edit_do_popup       (ECellPopup *ecp,
                     GdkEvent   *event)
{
    ECellDateEdit *ecde = E_CELL_DATE_EDIT (ecp);
    guint32 time;
    gint error_code;

    e_cell_date_edit_show_popup (ecde);

    if (event->type == GDK_BUTTON_PRESS) {
        time = event->button.time;
    } else {
        time = event->key.time;
    }

    error_code = gdk_pointer_grab (ecde->popup_window->window, TRUE,
                       GDK_ENTER_NOTIFY_MASK |
                       GDK_BUTTON_PRESS_MASK | 
                       GDK_BUTTON_RELEASE_MASK |
                       GDK_POINTER_MOTION_HINT_MASK |
                       GDK_BUTTON1_MOTION_MASK,
                       NULL, NULL, time);
    if (error_code != 0)
        g_warning ("Failed to get pointer grab");

    gtk_grab_add (ecde->popup_window);

    return TRUE;
}


static void
e_cell_date_edit_show_popup     (ECellDateEdit  *ecde)
{
    gint x, y, width, height, old_width, old_height;

    g_print ("In e_cell_popup_popup_list\n");

    /* This code is practically copied from GtkCombo. */
    old_width = ecde->popup_window->allocation.width;
    old_height  = ecde->popup_window->allocation.height;

    e_cell_date_edit_get_popup_pos (ecde, &x, &y, &height, &width);

    gtk_widget_set_uposition (ecde->popup_window, x, y);
    gtk_widget_set_usize (ecde->popup_window, width, height);
    gtk_widget_realize (ecde->popup_window);
    gdk_window_resize (ecde->popup_window->window, width, height);
    gtk_widget_show (ecde->popup_window);

    /* FIXME: Set the focus to the first widget. */
    gtk_widget_grab_focus (ecde->popup_window);

    E_CELL_POPUP (ecde)->popup_shown = TRUE;
}


/* Calculates the size and position of the popup window (like GtkCombo). */
static void
e_cell_date_edit_get_popup_pos      (ECellDateEdit  *ecde,
                     gint       *x,
                     gint       *y,
                     gint       *height,
                     gint       *width)
{
    ECellPopup *ecp = E_CELL_POPUP (ecde);
    ETableItem *eti = E_TABLE_ITEM (ecp->popup_cell_view->cell_view.e_table_item_view);
    GtkWidget *canvas = GTK_WIDGET (GNOME_CANVAS_ITEM (eti)->canvas);
    GtkRequisition popup_requisition;
    gint avail_height, screen_width, column_width, row_height;
    double x1, y1;
  
    gdk_window_get_origin (canvas->window, x, y);

    x1 = e_table_header_col_diff (eti->header, 0, eti->editing_col + 1);
    y1 = eti_row_diff (eti, 0, eti->editing_row + 1);
    column_width = e_table_header_col_diff (eti->header, eti->editing_col,
                        eti->editing_col + 1);
    row_height = eti_row_diff (eti, eti->editing_row,
                   eti->editing_row + 1);
    gnome_canvas_item_i2w (GNOME_CANVAS_ITEM (eti), &x1, &y1);

    *x += x1;
    /* The ETable positions don't include the grid lines, I think, so we
       add 1. */
    *y += y1 + 1;

    avail_height = gdk_screen_height () - *y;

    /* We'll use the entire screen width if needed, but we save space for
       the vertical scrollbar in case we need to show that. */
    screen_width = gdk_screen_width ();
  
    gtk_widget_size_request (ecde->popup_window, &popup_requisition);
  
    /* Calculate the desired width. */
    *width = popup_requisition.width;

    /* Use at least the same width as the column. */
    if (*width < column_width)
        *width = column_width;

    /* Check if it fits in the available height. */
    if (popup_requisition.height > avail_height) {
        /* It doesn't fit, so we see if we have the minimum space
           needed. */
        if (*y - row_height > avail_height) {
            /* We don't, so we show the popup above the cell
               instead of below it. */
            avail_height = *y - row_height;
            *y -= (popup_requisition.height + row_height);
            if (*y < 0)
                *y = 0;
        }
    }

    /* We try to line it up with the right edge of the column, but we don't
       want it to go off the edges of the screen. */
    if (*x > screen_width)
        *x = screen_width;
    *x -= *width;
    if (*x < 0)
        *x = 0;

    *height = popup_requisition.height;
}


/* This handles key press events in the popup window. If the Escape key is
   pressed we hide the popup, and do not change the cell contents. */
static int
e_cell_date_edit_key_press      (GtkWidget  *popup_window,
                     GdkEventKey    *event,
                     ECellDateEdit  *ecde)
{
    g_print ("In e_cell_date_edit_key_press\n");

    /* If the Escape key is pressed we hide the popup. */
    if (event->keyval != GDK_Escape)
        return FALSE;

    gtk_grab_remove (ecde->popup_window);
    gdk_pointer_ungrab (event->time);
    gtk_widget_hide (ecde->popup_window);

    E_CELL_POPUP (ecde)->popup_shown = FALSE;

    return TRUE;
}


/* Clears the time list and rebuilds it using the lower_hour, upper_hour
   and use_24_hour_format settings. */
static void
e_cell_date_edit_rebuild_time_list      (ECellDateEdit  *ecde)
{
    GtkList *list;
    GtkWidget *listitem;
    char buffer[40], *format;
    struct tm tmp_tm;
    gint hour, min;

    list = GTK_LIST (ecde->time_list);

    gtk_list_clear_items (list, 0, -1);

    /* Fill the struct tm with some sane values. */
    tmp_tm.tm_year = 2000;
    tmp_tm.tm_mon = 0;
    tmp_tm.tm_mday = 1;
    tmp_tm.tm_sec  = 0;
    tmp_tm.tm_isdst = 0;

    for (hour = ecde->lower_hour; hour <= ecde->upper_hour; hour++) {

        /* We don't want to display midnight at the end, since that is
           really in the next day. */
        if (hour == 24)
            break;

        /* We want to finish on upper_hour, with min == 0. */
        for (min = 0;
             min == 0 || (min < 60 && hour != ecde->upper_hour);
             min += 30) {
            tmp_tm.tm_hour = hour;
            tmp_tm.tm_min  = min;

            if (ecde->use_24_hour_format)
                /* This is a strftime() format. %H = hour (0-23), %M = minute. */
                format = _("%H:%M");
            else
                /* This is a strftime() format. %I = hour (1-12), %M = minute, %p = am/pm string. */
                format = _("%I:%M %p");

            strftime (buffer, sizeof (buffer), format, &tmp_tm);

            listitem = gtk_list_item_new_with_label (buffer);
            gtk_widget_show (listitem);
            gtk_container_add (GTK_CONTAINER (list), listitem);
        }
    }
}