path: root/calendar/gui/goto.c

/* Go to date dialog for gnomecal
 *
 * Copyright (C) 1998 Red Hat Software, Inc.
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 */

#include <config.h>
#include <gnome.h>
#include "gnome-cal.h"
#include "gnome-month-item.h"
#include "calendar-commands.h"
#include "mark.h"
#include "cal-util/timeutil.h"


static GtkWidget *goto_win;     /* The goto dialog window */
static GnomeMonthItem *month_item;  /* The month item in the dialog */
static GnomeCalendar *gnome_calendar;   /* The gnome calendar the dialog refers to */
static int current_index;       /* The index of the day marked as current, or -1 if none */


/* Updates the specified month item by marking it appropriately from the calendar the dialog refers
 * to.  Also marks the current day if appropriate.
 */
static void
update (void)
{
    GnomeCanvasItem *item;
    time_t t;
    struct tm tm;

    unmark_month_item (month_item);
    mark_month_item (month_item, gnome_calendar);

    if (current_index != -1) {
        item = gnome_month_item_num2child (month_item,
                           GNOME_MONTH_ITEM_DAY_LABEL + current_index);
        gnome_canvas_item_set (item,
                       "fill_color", color_spec_from_prop (COLOR_PROP_DAY_FG),
                       "fontset", NORMAL_DAY_FONTSET,
                       NULL);
        current_index = -1;
    }

    t = time (NULL);
    tm = *localtime (&t);

    if (((tm.tm_year + 1900) == month_item->year) && (tm.tm_mon == month_item->month)) {
        current_index = gnome_month_item_day2index (month_item, tm.tm_mday);
        g_assert (current_index != -1);

        item = gnome_month_item_num2child (month_item,
                           GNOME_MONTH_ITEM_DAY_LABEL + current_index);
        gnome_canvas_item_set (item,
                       "fill_color", color_spec_from_prop (COLOR_PROP_CURRENT_DAY_FG),
                       "fontset", CURRENT_DAY_FONTSET,
                       NULL);
    }
}

/* Callback used when the year adjustment is changed */
static void
year_changed (GtkAdjustment *adj, gpointer data)
{
    gnome_canvas_item_set (GNOME_CANVAS_ITEM (month_item),
                   "year", (int) adj->value,
                   NULL);
    update ();
}

/* Creates the year control with its adjustment */
static GtkWidget *
create_year (int year)
{
    GtkWidget *hbox;
    GtkAdjustment *adj;
    GtkWidget *w;

    hbox = gtk_hbox_new (FALSE, GNOME_PAD_SMALL);

    w = gtk_label_new (_("Year:"));
    gtk_box_pack_start (GTK_BOX (hbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    adj = GTK_ADJUSTMENT (gtk_adjustment_new (year, 1900, 9999, 1, 10, 10));
    gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
                (GtkSignalFunc) year_changed,
                NULL);

    w = gtk_spin_button_new (adj, 1.0, 0);
    gtk_widget_set_usize (w, 60, 0);
    gtk_box_pack_start (GTK_BOX (hbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    return hbox;
}

/* Callback used when a month button is toggled */
static void
month_toggled (GtkToggleButton *toggle, gpointer data)
{
    if (!toggle->active)
        return;

    gnome_canvas_item_set (GNOME_CANVAS_ITEM (month_item),
                   "month", GPOINTER_TO_INT (data),
                   NULL);
    update ();
}

/* Creates the months control */
static GtkWidget *
create_months (int month)
{
    GtkWidget *table;
    GtkWidget *w;
    GSList *group;
    int i, row, col;
    struct tm tm;
    char buf[100];

    tm = *localtime (&gnome_calendar->current_display);

    table = gtk_table_new (2, 6, TRUE);

    group = NULL;

    for (i = 0; i < 12; i++) {
        row = i / 6;
        col = i % 6;

        tm.tm_mon = i;
        strftime (buf, 100, "%b", &tm);

        w = gtk_radio_button_new (group);
        group = gtk_radio_button_group (GTK_RADIO_BUTTON (w));
        gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (w), FALSE);

        gtk_container_add (GTK_CONTAINER (w), gtk_label_new (buf));

        if (i == month)
            gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (w), TRUE);

        gtk_signal_connect (GTK_OBJECT (w), "toggled",
                    (GtkSignalFunc) month_toggled,
                    GINT_TO_POINTER (i));
        gtk_table_attach (GTK_TABLE (table), w,
                  col, col + 1,
                  row, row + 1,
                  GTK_EXPAND | GTK_FILL,
                  GTK_EXPAND | GTK_FILL,
                  0, 0);
        gtk_widget_show_all (w);
    }

    return table;
}

/* Sets the scrolling region of the canvas to the allocation size */
static void
set_scroll_region (GtkWidget *widget, GtkAllocation *allocation)
{
    gnome_canvas_item_set (GNOME_CANVAS_ITEM (month_item),
                   "width", (double) (allocation->width - 1),
                   "height", (double) (allocation->height - 1),
                   NULL);

    gnome_canvas_set_scroll_region (GNOME_CANVAS (widget),
                    0, 0,
                    allocation->width, allocation->height);
}

/* Event handler for day groups in the month item.  A button press makes the calendar jump to the
 * selected day and destroys the Go-to dialog box.
 */
static gint
day_event (GnomeCanvasItem *item, GdkEvent *event, gpointer data)
{
    int child_num, day;

    child_num = gnome_month_item_child2num (month_item, item);
    day = gnome_month_item_num2day (month_item, child_num);

    switch (event->type) {
    case GDK_BUTTON_PRESS:
        if ((event->button.button == 1) && (day != 0)) {
            gnome_calendar_goto (gnome_calendar,
                         time_from_day (month_item->year, month_item->month, day));
            gtk_widget_destroy (goto_win);
        }
        break;

    default:
        break;
    }

    return FALSE;
}

/* Creates the canvas with the month item for selecting days */
static GtkWidget *
create_days (int day, int month, int year)
{
    GtkWidget *canvas;
    int i;
    GnomeCanvasItem *day_group;

    canvas = gnome_canvas_new ();
    gtk_widget_set_usize (canvas, 150, 120);

    month_item = GNOME_MONTH_ITEM (gnome_month_item_new (gnome_canvas_root (GNOME_CANVAS (canvas))));
    gnome_canvas_item_set (GNOME_CANVAS_ITEM (month_item),
                   "month", month,
                   "year", year,
                   "start_on_monday", week_starts_on_monday,
                   NULL);
    colorify_month_item (month_item, default_color_func, NULL);
    month_item_prepare_prelight (month_item, default_color_func, NULL);
    update ();

    /* Connect to size_allocate so that we can change the size of the month item and the
     * scrolling region appropriately.
     */

    gtk_signal_connect (GTK_OBJECT (canvas), "size_allocate",
                (GtkSignalFunc) set_scroll_region,
                NULL);

    /* Bind the day groups to our event handler */

    for (i = 0; i < 42; i++) {
        day_group = gnome_month_item_num2child (month_item, i + GNOME_MONTH_ITEM_DAY_GROUP);
        gtk_signal_connect (GTK_OBJECT (day_group), "event",
                    (GtkSignalFunc) day_event,
                    NULL);
    }

    return canvas;
}

static void
goto_today (GtkWidget *widget, gpointer data)
{
    gnome_calendar_goto_today (gnome_calendar);
    gtk_widget_destroy (goto_win);
}

/* Creates a "goto date" dialog and runs it */
void
goto_dialog (GnomeCalendar *gcal)
{
    GtkWidget *vbox;
    GtkWidget *hbox;
    GtkWidget *w;
    GtkWidget *days;
    struct tm tm;

    gnome_calendar = gcal;
    current_index = -1;

    tm = *localtime (&gnome_calendar->current_display);

    goto_win = gnome_dialog_new (_("Go to date"),
                     GNOME_STOCK_BUTTON_CANCEL,
                     NULL);
    gnome_dialog_set_parent (GNOME_DIALOG (goto_win), GTK_WINDOW (gcal));
    
    vbox = GNOME_DIALOG (goto_win)->vbox;

    /* Instructions */

    w = gtk_label_new (_("Please select the date you want to go to.\n"
                 "When you click on a day, you will be taken\n"
                 "to that date."));
    gtk_label_set_justify (GTK_LABEL (w), GTK_JUSTIFY_LEFT);
    gtk_misc_set_alignment (GTK_MISC (w), 0.0, 0.0);
    gtk_box_pack_start (GTK_BOX (vbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    /* Create month item before creating the year controls, since the latter ones need the
     * month_item to be created.
     */

    days = create_days (tm.tm_mday, tm.tm_mon, tm.tm_year + 1900);

    /* Year */

    w = create_year (tm.tm_year + 1900);
    gtk_box_pack_start (GTK_BOX (vbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    /* Month */

    w = create_months (tm.tm_mon);
    gtk_box_pack_start (GTK_BOX (vbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    /* Days (canvas with month item) */

    gtk_box_pack_start (GTK_BOX (vbox), days, TRUE, TRUE, 0);
    gtk_widget_show (days);

    /* Today button */

    hbox = gtk_hbox_new (FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
    gtk_widget_show (hbox);

    w = gtk_button_new_with_label (_("Go to today"));
    gtk_signal_connect (GTK_OBJECT (w), "clicked",
                (GtkSignalFunc) goto_today,
                NULL);
    gtk_box_pack_start (GTK_BOX (hbox), w, FALSE, FALSE, 0);
    gtk_widget_show (w);

    /* Run! */

    gtk_window_set_modal (GTK_WINDOW (goto_win), TRUE);
    gnome_dialog_set_close (GNOME_DIALOG (goto_win), TRUE);
    gnome_dialog_set_parent (GNOME_DIALOG (goto_win), GTK_WINDOW (gnome_calendar));
    gtk_widget_show (goto_win);
}