path: root/calendar/gui/dialogs/task-details-page.c

/* Evolution calendar - Main page of the task editor dialog
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Authors: Federico Mena-Quintero <federico@ximian.com>
 *          Miguel de Icaza <miguel@ximian.com>
 *          Seth Alves <alves@hungry.com>
 *          JP Rosevear <jpr@ximian.com>
 *
 * 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.
 */

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

#include <gtk/gtksignal.h>
#include <gtk/gtktogglebutton.h>
#include <glade/glade.h>
#include <gal/widgets/e-unicode.h>
#include <widgets/misc/e-dateedit.h>
#include "e-util/e-dialog-widgets.h"
#include "../calendar-config.h"
#include "../e-timezone-entry.h"
#include "comp-editor-util.h"
#include "task-details-page.h"



/* Private part of the TaskDetailsPage structure */
struct _TaskDetailsPagePrivate {
    /* Glade XML data */
    GladeXML *xml;

    /* Widgets from the Glade file */
    GtkWidget *main;

    GtkWidget *summary;
    GtkWidget *date_time;
    
    GtkWidget *completed_date;

    GtkWidget *url;

    GtkWidget *organizer;
    GtkWidget *organizer_lbl;
    GtkWidget *delegated_to;
    GtkWidget *delegated_to_lbl;
    GtkWidget *delegated_from;
    GtkWidget *delegated_from_lbl;  

    gboolean updating;
};



static void task_details_page_class_init (TaskDetailsPageClass *class);
static void task_details_page_init (TaskDetailsPage *tdpage);
static void task_details_page_destroy (GtkObject *object);

static GtkWidget *task_details_page_get_widget (CompEditorPage *page);
static void task_details_page_focus_main_widget (CompEditorPage *page);
static void task_details_page_fill_widgets (CompEditorPage *page, CalComponent *comp);
static void task_details_page_fill_component (CompEditorPage *page, CalComponent *comp);
static void task_details_page_set_summary (CompEditorPage *page, const char *summary);
static void task_details_page_set_dates (CompEditorPage *page, CompEditorPageDates *dates);

static CompEditorPageClass *parent_class = NULL;



/**
 * task_details_page_get_type:
 * 
 * Registers the #TaskDetailsPage class if necessary, and returns the type ID
 * associated to it.
 * 
 * Return value: The type ID of the #TaskDetailsPage class.
 **/
GtkType
task_details_page_get_type (void)
{
    static GtkType task_details_page_type;

    if (!task_details_page_type) {
        static const GtkTypeInfo task_details_page_info = {
            "TaskDetailsPage",
            sizeof (TaskDetailsPage),
            sizeof (TaskDetailsPageClass),
            (GtkClassInitFunc) task_details_page_class_init,
            (GtkObjectInitFunc) task_details_page_init,
            NULL, /* reserved_1 */
            NULL, /* reserved_2 */
            (GtkClassInitFunc) NULL
        };

        task_details_page_type = 
            gtk_type_unique (TYPE_COMP_EDITOR_PAGE,
                     &task_details_page_info);
    }

    return task_details_page_type;
}

/* Class initialization function for the task page */
static void
task_details_page_class_init (TaskDetailsPageClass *class)
{
    CompEditorPageClass *editor_page_class;
    GtkObjectClass *object_class;

    editor_page_class = (CompEditorPageClass *) class;
    object_class = (GtkObjectClass *) class;

    parent_class = gtk_type_class (TYPE_COMP_EDITOR_PAGE);

    editor_page_class->get_widget = task_details_page_get_widget;
    editor_page_class->focus_main_widget = task_details_page_focus_main_widget;
    editor_page_class->fill_widgets = task_details_page_fill_widgets;
    editor_page_class->fill_component = task_details_page_fill_component;
    editor_page_class->set_summary = task_details_page_set_summary;
    editor_page_class->set_dates = task_details_page_set_dates;

    object_class->destroy = task_details_page_destroy;
}

/* Object initialization function for the task page */
static void
task_details_page_init (TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;

    priv = g_new0 (TaskDetailsPagePrivate, 1);
    tdpage->priv = priv;

    priv->xml = NULL;

    priv->main = NULL;
    priv->summary = NULL;
    priv->date_time = NULL;
    priv->completed_date = NULL;
    priv->url = NULL;

    priv->updating = FALSE;
}

/* Destroy handler for the task page */
static void
task_details_page_destroy (GtkObject *object)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;

    g_return_if_fail (object != NULL);
    g_return_if_fail (IS_TASK_DETAILS_PAGE (object));

    tdpage = TASK_DETAILS_PAGE (object);
    priv = tdpage->priv;

    if (priv->xml) {
        gtk_object_unref (GTK_OBJECT (priv->xml));
        priv->xml = NULL;
    }

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

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



/* get_widget handler for the task page */
static GtkWidget *
task_details_page_get_widget (CompEditorPage *page)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;

    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    return priv->main;
}

/* focus_main_widget handler for the task page */
static void
task_details_page_focus_main_widget (CompEditorPage *page)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;

    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    gtk_widget_grab_focus (priv->organizer);
}

/* Fills the widgets with default values */
static void
clear_widgets (TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;

    priv = tdpage->priv;

    /* Summary */
    gtk_label_set_text (GTK_LABEL (priv->summary), "");

    /* Start date */
    gtk_label_set_text (GTK_LABEL (priv->date_time), "");

    /* Date completed */
    e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), -1);

    /* URL */
    e_dialog_editable_set (priv->url, NULL);
}

/* fill_widgets handler for the task page */
static void
task_details_page_fill_widgets (CompEditorPage *page, CalComponent *comp)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    GSList *list;
    CalComponentText text;
    CalComponentOrganizer organizer;
    const char *url;
    CompEditorPageDates dates;
    
    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    priv->updating = TRUE;
    
    /* Clean the screen */
    clear_widgets (tdpage);
    
    /* Summary */
    cal_component_get_summary (comp, &text);
    task_details_page_set_summary (page, text.value);

    /* Dates */
    comp_editor_dates (&dates, comp);
    task_details_page_set_dates (page, &dates);
    
    /* URL */
    cal_component_get_url (comp, &url);
    e_dialog_editable_set (priv->url, url);

    /* Delegation */
    cal_component_get_organizer (comp, &organizer);
    if (organizer.value)
        e_dialog_editable_set (priv->organizer, organizer.value);

    cal_component_get_attendee_list (comp, &list);
    if (list != NULL) {
        CalComponentAttendee *attendee;
        
        attendee = list->data;
        if (attendee->delto)
            e_dialog_editable_set (priv->delegated_to, attendee->delto);
        if (attendee->delfrom) {
            gchar *s = e_utf8_to_gtk_string (priv->delegated_from, attendee->delfrom);
            gtk_label_set_text (GTK_LABEL (priv->delegated_from), s);
            g_free (s);
        }
    }
    cal_component_free_attendee_list (list);
    
    priv->updating = FALSE;
}

/* fill_component handler for the task page */
static void
task_details_page_fill_component (CompEditorPage *page, CalComponent *comp)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    struct icaltimetype icaltime;
    GSList list;
    CalComponentOrganizer organizer;
    CalComponentAttendee attendee;
    char *url;
    gboolean date_set;
    
    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    icaltime = icaltime_null_time ();

    /* COMPLETED must be in UTC. */
    icaltime.is_utc = 1;

    /* Completed Date. */
    date_set = e_date_edit_get_date (E_DATE_EDIT (priv->completed_date),
                     &icaltime.year,
                     &icaltime.month,
                     &icaltime.day);
    e_date_edit_get_time_of_day (E_DATE_EDIT (priv->completed_date),
                     &icaltime.hour,
                     &icaltime.minute);
    if (date_set) {
        /* COMPLETED must be in UTC, so we assume that the date in the
           dialog is in the current timezone, and we now convert it
           to UTC. FIXME: We should really use one timezone for the
           entire time the dialog is shown. Otherwise if the user
           changes the timezone, the COMPLETED date may get changed
           as well. */
        char *location = calendar_config_get_timezone ();
        icaltimezone *zone = icaltimezone_get_builtin_timezone (location);
        icaltimezone_convert_time (&icaltime, zone,
                       icaltimezone_get_utc_timezone ());
        cal_component_set_completed (comp, &icaltime);
    } else {
        cal_component_set_completed (comp, NULL);
    }

    /* URL. */
    url = e_dialog_editable_get (priv->url);
    cal_component_set_url (comp, url);
    if (url)
        g_free (url);

    /* Delegation */
    organizer.value = e_dialog_editable_get (priv->organizer);
    organizer.sentby = NULL;
    organizer.cn = NULL;
    organizer.language = NULL;
    cal_component_set_organizer (comp, &organizer);
    attendee.value = e_dialog_editable_get (priv->delegated_to);
    attendee.member = NULL;
    attendee.cutype = CAL_COMPONENT_CUTYPE_INDIVIDUAL;
    attendee.role = CAL_COMPONENT_ROLE_REQUIRED;
    attendee.status = CAL_COMPONENT_PARTSTAT_NEEDSACTION;
    attendee.rsvp = TRUE;
    attendee.delto = e_dialog_editable_get (priv->delegated_to);
    attendee.delfrom = NULL;
    attendee.sentby = NULL;
    attendee.cn = NULL;
    attendee.language = NULL;
    list.data = &attendee;
    list.next = NULL;
    cal_component_set_attendee_list (comp, &list);
    g_free ((char *)organizer.value);
    g_free ((char *)attendee.value);
    g_free ((char *)attendee.delto);
    g_free ((char *)attendee.delfrom);
}

/* set_summary handler for the task page */
static void
task_details_page_set_summary (CompEditorPage *page, const char *summary)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    gchar *s;
    
    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    s = e_utf8_to_gtk_string (priv->summary, summary);
    gtk_label_set_text (GTK_LABEL (priv->summary), s);
    g_free (s);
}

static void
task_details_page_set_dates (CompEditorPage *page, CompEditorPageDates *dates)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;

    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    if (priv->updating)
        return;
    
    priv->updating = TRUE;
    
    comp_editor_date_label (dates, priv->date_time);

    if (dates->complete) {
        if (icaltime_is_null_time (*dates->complete)) {
            e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), -1);
        } else {
            struct icaltimetype *tt = dates->complete;

            /* Convert it from UTC to local time to display.
               FIXME: We should really use one timezone for the
               entire time the dialog is shown. Otherwise if the
               user changes the timezone, the COMPLETED date may
               get changed as well. */
            char *location = calendar_config_get_timezone ();
            icaltimezone *zone = icaltimezone_get_builtin_timezone (location);
            icaltimezone_convert_time (tt,
                           icaltimezone_get_utc_timezone (),
                           zone);

            e_date_edit_set_date (E_DATE_EDIT (priv->completed_date),
                          tt->year, tt->month, tt->day);
            e_date_edit_set_time_of_day (E_DATE_EDIT (priv->completed_date),
                             tt->hour, tt->minute);
        }
    }
    
    priv->updating = FALSE;
}



/* Gets the widgets from the XML file and returns if they are all available. */
static gboolean
get_widgets (TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;

    priv = tdpage->priv;

#define GW(name) glade_xml_get_widget (priv->xml, name)

    priv->main = GW ("task-details-page");
    if (!priv->main)
        return FALSE;

    gtk_widget_ref (priv->main);
    gtk_widget_unparent (priv->main);

    priv->summary = GW ("summary");
    priv->date_time = GW ("date-time");

    priv->completed_date = GW ("completed-date");

    priv->url = GW ("url");

    priv->organizer = GW ("organizer");
    priv->organizer_lbl = GW ("organizer-label");
    priv->delegated_to = GW ("delegated-to");
    priv->delegated_to_lbl = GW ("delegated-to-label");
    priv->delegated_from = GW ("delegated-from");
    priv->delegated_from_lbl = GW ("delegated-from-label");

#undef GW

    return (priv->summary
        && priv->date_time
        && priv->completed_date
        && priv->url
        && priv->organizer
        && priv->organizer_lbl
        && priv->delegated_to
        && priv->delegated_to_lbl
        && priv->delegated_from
        && priv->delegated_from_lbl);
}

/* Callback used when the start or end date widgets change.  We check that the
 * start date < end date and we set the "all day task" button as appropriate.
 */
static void
date_changed_cb (EDateEdit *dedit, gpointer data)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    CompEditorPageDates dates;
    struct icaltimetype completed_tt = icaltime_null_time();
    gboolean date_set;

    tdpage = TASK_DETAILS_PAGE (data);
    priv = tdpage->priv;

    if (priv->updating)
        return;

    date_set = e_date_edit_get_date (E_DATE_EDIT (priv->completed_date),
                     &completed_tt.year,
                     &completed_tt.month,
                     &completed_tt.day);
    e_date_edit_get_time_of_day (E_DATE_EDIT (priv->completed_date),
                     &completed_tt.hour,
                     &completed_tt.minute);
    if (!date_set)
        completed_tt = icaltime_null_time ();

    dates.start = NULL;
    dates.end = NULL;
    dates.due = NULL;
    dates.complete = &completed_tt;
    
    /* Notify upstream */
    comp_editor_page_notify_dates_changed (COMP_EDITOR_PAGE (tdpage), &dates);
}

/* This is called when any field is changed; it notifies upstream. */
static void
field_changed_cb (GtkWidget *widget, gpointer data)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    
    tdpage = TASK_DETAILS_PAGE (data);
    priv = tdpage->priv;
    
    if (!priv->updating)
        comp_editor_page_notify_changed (COMP_EDITOR_PAGE (tdpage));
}

/* Hooks the widget signals */
static void
init_widgets (TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;

    priv = tdpage->priv;

    /* Make sure the EDateEdit widgets use our timezones to get the
       current time. */
    e_date_edit_set_get_time_callback (E_DATE_EDIT (priv->completed_date),
                       (EDateEditGetTimeCallback) comp_editor_get_current_time,
                       tdpage, NULL);

    /* Completed Date */
    gtk_signal_connect (GTK_OBJECT (priv->completed_date), "changed",
                GTK_SIGNAL_FUNC (date_changed_cb), tdpage);

    /* URL */
    gtk_signal_connect (GTK_OBJECT (priv->url), "changed",
                GTK_SIGNAL_FUNC (field_changed_cb), tdpage);

    /* Delegation */
    gtk_signal_connect (GTK_OBJECT (priv->organizer), "changed",
                GTK_SIGNAL_FUNC (field_changed_cb), tdpage);

    gtk_signal_connect (GTK_OBJECT (priv->delegated_to), "changed",
                GTK_SIGNAL_FUNC (field_changed_cb), tdpage);

}



/**
 * task_details_page_construct:
 * @tdpage: An task details page.
 * 
 * Constructs an task page by loading its Glade data.
 * 
 * Return value: The same object as @tdpage, or NULL if the widgets could not 
 * be created.
 **/
TaskDetailsPage *
task_details_page_construct (TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;

    priv = tdpage->priv;

    priv->xml = glade_xml_new (EVOLUTION_GLADEDIR 
                   "/task-details-page.glade", NULL);
    if (!priv->xml) {
        g_message ("task_details_page_construct(): "
               "Could not load the Glade XML file!");
        return NULL;
    }

    if (!get_widgets (tdpage)) {
        g_message ("task_details_page_construct(): "
               "Could not find all widgets in the XML file!");
        return NULL;
    }

    init_widgets (tdpage);

    return tdpage;
}

/**
 * task_details_page_new:
 * 
 * Creates a new task details page.
 * 
 * Return value: A newly-created task details page, or NULL if the page could
 * not be created.
 **/
TaskDetailsPage *
task_details_page_new (void)
{
    TaskDetailsPage *tdpage;

    tdpage = gtk_type_new (TYPE_TASK_DETAILS_PAGE);
    if (!task_details_page_construct (tdpage)) {
        gtk_object_unref (GTK_OBJECT (tdpage));
        return NULL;
    }

    return tdpage;
}

void
task_details_page_show_delegation (TaskDetailsPage *tdpage, gboolean show)
{
    TaskDetailsPagePrivate *priv;

    priv = tdpage->priv;

    if (show) {
        gtk_widget_show (priv->organizer);
        gtk_widget_show (priv->organizer_lbl);
        gtk_widget_show (priv->delegated_to);
        gtk_widget_show (priv->delegated_to_lbl);
        gtk_widget_show (priv->delegated_from);
        gtk_widget_show (priv->delegated_from_lbl);
        comp_editor_page_notify_needs_send (COMP_EDITOR_PAGE (tdpage));
    } else {
        gtk_widget_hide (priv->organizer);
        gtk_widget_hide (priv->organizer_lbl);
        gtk_widget_hide (priv->delegated_to);
        gtk_widget_hide (priv->delegated_to_lbl);
        gtk_widget_hide (priv->delegated_from);
        gtk_widget_hide (priv->delegated_from_lbl);
    }
}

GtkWidget *task_details_page_create_date_edit (void);

GtkWidget *
task_details_page_create_date_edit (void)
{
    GtkWidget *dedit;

    dedit = comp_editor_new_date_edit (TRUE, TRUE);
    e_date_edit_set_allow_no_date_set (E_DATE_EDIT (dedit), TRUE);

    return dedit;
}