path: root/calendar/gui/dialogs/goto-dialog.c

/*
 * Go to date dialog for Evolution
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Federico Mena <federico@ximian.com>
 *      JP Rosevear <jpr@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 * Copyright (C) 1998 Red Hat, Inc.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtk.h>

#include "goto-dialog.h"

#include "e-util/e-util.h"
#include "e-util/e-util-private.h"
#include "calendar/gui/calendar-config.h"
#include "calendar/gui/tag-calendar.h"

typedef struct
{
    GtkBuilder *builder;
    GtkWidget *dialog;

    GtkWidget *month_combobox;
    GtkWidget *year;
    ECalendar *ecal;
    GtkWidget *vbox;

    GnomeCalendar *gcal;
    gint year_val;
    gint month_val;
    gint day_val;

    GCancellable *cancellable;
} GoToDialog;

static GoToDialog *dlg = NULL;

/* Callback used when the year adjustment is changed */
static void
year_changed (GtkAdjustment *adj,
              gpointer data)
{
    GtkSpinButton *spin_button;
    GoToDialog *dlg = data;

    spin_button = GTK_SPIN_BUTTON (dlg->year);
    dlg->year_val = gtk_spin_button_get_value_as_int (spin_button);

    e_calendar_item_set_first_month (
        dlg->ecal->calitem, dlg->year_val, dlg->month_val);
}

/* Callback used when a month button is toggled */
static void
month_changed (GtkToggleButton *toggle,
               gpointer data)
{
    GtkComboBox *combo_box;
    GoToDialog *dlg = data;

    combo_box = GTK_COMBO_BOX (dlg->month_combobox);
    dlg->month_val = gtk_combo_box_get_active (combo_box);

    e_calendar_item_set_first_month (
        dlg->ecal->calitem, dlg->year_val, dlg->month_val);
}

static void
ecal_date_range_changed (ECalendarItem *calitem,
                         gpointer user_data)
{
    GoToDialog *dlg = user_data;
    ECalModel *model;
    ECalClient *client;

    model = gnome_calendar_get_model (dlg->gcal);
    client = e_cal_model_get_default_client (model);
    if (client)
        tag_calendar_by_client (dlg->ecal, client, dlg->cancellable);
}

/* 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 void
ecal_event (ECalendarItem *calitem,
            gpointer user_data)
{
    GoToDialog *dlg = user_data;
    GDate start_date, end_date;
    ECalModel *model;
    struct icaltimetype tt = icaltime_null_time ();
    icaltimezone *timezone;
    time_t et;

    model = gnome_calendar_get_model (dlg->gcal);
    e_calendar_item_get_selection (calitem, &start_date, &end_date);
    timezone = e_cal_model_get_timezone (model);

    tt.year = g_date_get_year (&start_date);
    tt.month = g_date_get_month (&start_date);
    tt.day = g_date_get_day (&start_date);

    et = icaltime_as_timet_with_zone (tt, timezone);

    gnome_calendar_goto (dlg->gcal, et);

    gtk_dialog_response (GTK_DIALOG (dlg->dialog), GTK_RESPONSE_NONE);
}

/* Returns the current time, for the ECalendarItem. */
static struct tm
get_current_time (ECalendarItem *calitem,
                  gpointer data)
{
    icaltimezone *zone;
    struct tm tmp_tm = { 0 };
    struct icaltimetype tt;

    /* Get the current timezone. */
    zone = calendar_config_get_icaltimezone ();

    tt = icaltime_from_timet_with_zone (time (NULL), FALSE, zone);

    /* Now copy it to the struct tm and return it. */
    tmp_tm.tm_year  = tt.year - 1900;
    tmp_tm.tm_mon   = tt.month - 1;
    tmp_tm.tm_mday  = tt.day;
    tmp_tm.tm_hour  = tt.hour;
    tmp_tm.tm_min   = tt.minute;
    tmp_tm.tm_sec   = tt.second;
    tmp_tm.tm_isdst = -1;

    return tmp_tm;
}

/* Creates the ecalendar */
static void
create_ecal (GoToDialog *dlg)
{
    ECalendarItem *calitem;

    dlg->ecal = E_CALENDAR (e_calendar_new ());
    calitem = dlg->ecal->calitem;

    gnome_canvas_item_set (
        GNOME_CANVAS_ITEM (calitem),
        "move_selection_when_moving", FALSE,
        NULL);
    e_calendar_item_set_display_popup (calitem, FALSE);
    gtk_widget_show (GTK_WIDGET (dlg->ecal));
    gtk_box_pack_start (GTK_BOX (dlg->vbox), GTK_WIDGET (dlg->ecal), TRUE, TRUE, 0);

    e_calendar_item_set_first_month (calitem, dlg->year_val, dlg->month_val);
    e_calendar_item_set_get_time_callback (
        calitem,
        get_current_time,
        dlg, NULL);

    ecal_date_range_changed (calitem, dlg);
}

static void
goto_today (GoToDialog *dlg)
{
    gnome_calendar_goto_today (dlg->gcal);
}

/* Gets the widgets from the XML file and returns if they are all available. */
static gboolean
get_widgets (GoToDialog *dlg)
{
    #define GW(name) e_builder_get_widget (dlg->builder, name)

    dlg->dialog = GW ("goto-dialog");

    dlg->month_combobox = GW ("month-combobox");
    dlg->year = GW ("year");
    dlg->vbox = GW ("vbox");

    #undef GW

    return (dlg->dialog
        && dlg->month_combobox
        && dlg->year
        && dlg->vbox);
}

static void
goto_dialog_init_widgets (GoToDialog *dlg)
{
    GtkAdjustment *adj;

    g_signal_connect (
        dlg->month_combobox, "changed",
        G_CALLBACK (month_changed), dlg);

    adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (dlg->year));
    g_signal_connect (
        adj, "value_changed",
        G_CALLBACK (year_changed), dlg);

    g_signal_connect (
        dlg->ecal->calitem, "date_range_changed",
        G_CALLBACK (ecal_date_range_changed), dlg);
    g_signal_connect (
        dlg->ecal->calitem, "selection_changed",
        G_CALLBACK (ecal_event), dlg);
}

/* Creates a "goto date" dialog and runs it */
void
goto_dialog (GtkWindow *parent,
             GnomeCalendar *gcal)
{
    ECalModel *model;
    time_t start_time;
    struct icaltimetype tt;
    icaltimezone *timezone;
    gint week_start_day;
    gint b;

    if (dlg) {
        return;
    }

    dlg = g_new0 (GoToDialog, 1);

    /* Load the content widgets */
    dlg->builder = gtk_builder_new ();
    e_load_ui_builder_definition (dlg->builder, "goto-dialog.ui");

    if (!get_widgets (dlg)) {
        g_message ("goto_dialog(): Could not find all widgets in the XML file!");
        g_free (dlg);
        return;
    }
    dlg->gcal = gcal;
    dlg->cancellable = g_cancellable_new ();

    model = gnome_calendar_get_model (gcal);
    timezone = e_cal_model_get_timezone (model);
    e_cal_model_get_time_range (model, &start_time, NULL);
    tt = icaltime_from_timet_with_zone (start_time, FALSE, timezone);
    dlg->year_val = tt.year;
    dlg->month_val = tt.month - 1;
    dlg->day_val = tt.day;

    gtk_combo_box_set_active (GTK_COMBO_BOX (dlg->month_combobox), dlg->month_val);
    gtk_spin_button_set_value (GTK_SPIN_BUTTON (dlg->year), dlg->year_val);

    create_ecal (dlg);

    goto_dialog_init_widgets (dlg);

    gtk_window_set_transient_for (GTK_WINDOW (dlg->dialog), parent);

    /* set initial selection to current day */

    dlg->ecal->calitem->selection_set = TRUE;
    dlg->ecal->calitem->selection_start_month_offset = 0;
    dlg->ecal->calitem->selection_start_day = tt.day;
    dlg->ecal->calitem->selection_end_month_offset = 0;
    dlg->ecal->calitem->selection_end_day = tt.day;

    /* Set week_start_day. Convert it to 0 (Mon) to 6 (Sun), which is what we use. */
    week_start_day = e_cal_model_get_week_start_day (model);
    dlg->ecal->calitem->week_start_day = (week_start_day + 6) % 7;

    gnome_canvas_item_grab_focus (GNOME_CANVAS_ITEM (dlg->ecal->calitem));

    b = gtk_dialog_run (GTK_DIALOG (dlg->dialog));
    gtk_widget_destroy (dlg->dialog);

    if (b == 0)
        goto_today (dlg);

    g_object_unref (dlg->builder);
    g_cancellable_cancel (dlg->cancellable);
    g_object_unref (dlg->cancellable);
    g_free (dlg);
    dlg = NULL;
}