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

/* Evolution calendar - task details page
 *
 * 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 *status;
    GtkWidget *priority;
    GtkWidget *percent_complete;

    GtkWidget *completed_date;

    GtkWidget *url;

    gboolean updating;
};

/* Note that these two arrays must match. */
static const int status_map[] = {
    ICAL_STATUS_NEEDSACTION,
    ICAL_STATUS_INPROCESS,
    ICAL_STATUS_COMPLETED,
    ICAL_STATUS_CANCELLED,
    -1
};

typedef enum {
    PRIORITY_HIGH,
    PRIORITY_NORMAL,
    PRIORITY_LOW,
    PRIORITY_UNDEFINED,
} TaskEditorPriority;

static const int priority_map[] = {
    PRIORITY_HIGH,
    PRIORITY_NORMAL,
    PRIORITY_LOW,
    PRIORITY_UNDEFINED,
    -1
};



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 gboolean task_details_page_fill_component (CompEditorPage *page, CalComponent *comp);

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;

    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->status = NULL;
    priv->priority = NULL;
    priv->percent_complete = 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->status);
}


static TaskEditorPriority
priority_value_to_index (int priority_value)
{
    TaskEditorPriority retval;

    if (priority_value == 0)
        retval = PRIORITY_UNDEFINED;
    else if (priority_value <= 4)
        retval = PRIORITY_HIGH;
    else if (priority_value == 5)
        retval = PRIORITY_NORMAL;
    else
        retval = PRIORITY_LOW;

    return retval;
}

static int
priority_index_to_value (TaskEditorPriority priority)
{
    int retval;

    switch (priority) {
    case PRIORITY_UNDEFINED:
        retval = 0;
        break;
    case PRIORITY_HIGH:
        retval = 3;
        break;
    case PRIORITY_NORMAL:
        retval = 5;
        break;
    case PRIORITY_LOW:
        retval = 7;
        break;
    default:
        retval = -1;
        g_assert_not_reached ();
        break;
    }

    return retval;
}

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

    priv = tdpage->priv;

    /* 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;
    int *priority_value, *percent;
    TaskEditorPriority priority;
    icalproperty_status status;
    const char *url;
    struct icaltimetype *completed = NULL;

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

    priv->updating = TRUE;
    
    /* Clean the screen */
    clear_widgets (tdpage);
    
    /* Percent Complete. */
    cal_component_get_percent (comp, &percent);
    if (percent) {
        e_dialog_spin_set (priv->percent_complete, *percent);
        cal_component_free_percent (percent);
    } else {
        /* FIXME: Could check if task is completed and set 100%. */
        e_dialog_spin_set (priv->percent_complete, 0);
    }

    /* Status. */
    cal_component_get_status (comp, &status);
    if (status == ICAL_STATUS_NONE) {
        /* Try to use the percent value. */
        if (percent) {
            if (*percent == 0)
                status = ICAL_STATUS_NEEDSACTION;
            else if (*percent == 100)
                status = ICAL_STATUS_COMPLETED;
            else
                status = ICAL_STATUS_INPROCESS;
        } else
            status = ICAL_STATUS_NEEDSACTION;
    }
    e_dialog_option_menu_set (priv->status, status, status_map);

    /* Completed Date. */
    cal_component_get_completed (comp, &completed);
    if (completed) {
        icaltimezone *utc_zone, *zone;
        char *location;

        /* Completed is in UTC, but that would confuse the user, so
           we convert it to local time. */
        utc_zone = icaltimezone_get_utc_timezone ();
        location = calendar_config_get_timezone ();
        zone = icaltimezone_get_builtin_timezone (location);

        icaltimezone_convert_time (completed, utc_zone, zone);

        e_date_edit_set_date (E_DATE_EDIT (priv->completed_date),
                      completed->year, completed->month,
                      completed->day);
        e_date_edit_set_time_of_day (E_DATE_EDIT (priv->completed_date),
                         completed->hour,
                         completed->minute);

        cal_component_free_icaltimetype (completed);
    }

    /* Priority. */
    cal_component_get_priority (comp, &priority_value);
    if (priority_value) {
        priority = priority_value_to_index (*priority_value);
        cal_component_free_priority (priority_value);
    } else {
        priority = PRIORITY_UNDEFINED;
    }
    e_dialog_option_menu_set (priv->priority, priority, priority_map);

    /* URL */
    cal_component_get_url (comp, &url);
    e_dialog_editable_set (priv->url, url);
    
    priv->updating = FALSE;
}

/* fill_component handler for the task page */
static gboolean
task_details_page_fill_component (CompEditorPage *page, CalComponent *comp)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    struct icaltimetype icaltime;
    icalproperty_status status;
    TaskEditorPriority priority;
    int priority_value, percent;
    char *url;
    gboolean date_set;
    
    tdpage = TASK_DETAILS_PAGE (page);
    priv = tdpage->priv;

    /* Percent Complete. */
    percent = e_dialog_spin_get_int (priv->percent_complete);
    cal_component_set_percent (comp, &percent);

    /* Status. */
    status = e_dialog_option_menu_get (priv->status, status_map);
    cal_component_set_status (comp, status);

    /* Priority. */
    priority = e_dialog_option_menu_get (priv->priority, priority_map);
    priority_value = priority_index_to_value (priority);
    cal_component_set_priority (comp, &priority_value);

    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);

    return TRUE;
}



/* 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->status = GW ("status");
    priv->priority = GW ("priority");
    priv->percent_complete = GW ("percent-complete");

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

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

#undef GW

    return (priv->status
        && priv->priority
        && priv->percent_complete
        && priv->completed_date
        && priv->url);
}


static void
complete_date_changed (TaskDetailsPage *tdpage, time_t ctime, gboolean complete)
{
    TaskDetailsPagePrivate *priv;
    CompEditorPageDates dates = {NULL, NULL, NULL, NULL};
    icaltimezone *zone;
    struct icaltimetype completed_tt = icaltime_null_time();

    priv = tdpage->priv;

    /* Get the current time in UTC. */
    zone = icaltimezone_get_utc_timezone ();
    completed_tt = icaltime_from_timet_with_zone (ctime, FALSE, zone);
    completed_tt.is_utc = TRUE;

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

static void
date_changed_cb (EDateEdit *dedit, gpointer data)
{
    TaskDetailsPage *tdpage;
    TaskDetailsPagePrivate *priv;
    CompEditorPageDates dates = {NULL, NULL, NULL, NULL};
    struct icaltimetype completed_tt = icaltime_null_time ();
    icalproperty_status status;
    gboolean date_set;

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

    if (priv->updating)
        return;

    priv->updating = TRUE;

    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);

    status = e_dialog_option_menu_get (priv->status, status_map);

    if (!date_set) {
        completed_tt = icaltime_null_time ();
        if (status == ICAL_STATUS_COMPLETED) {
            e_dialog_option_menu_set (priv->status,
                          ICAL_STATUS_NEEDSACTION,
                          status_map);
            e_dialog_spin_set (priv->percent_complete, 0);
        }
    } else {
        if (status != ICAL_STATUS_COMPLETED) {
            e_dialog_option_menu_set (priv->status,
                          ICAL_STATUS_COMPLETED,
                          status_map);
        }
        e_dialog_spin_set (priv->percent_complete, 100);
    }
    
    priv->updating = FALSE;

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

static void
status_changed (GtkMenu *menu, TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;
    icalproperty_status status;
    time_t ctime = -1;
    
    priv = tdpage->priv;

    if (priv->updating)
        return;

    priv->updating = TRUE;

    status = e_dialog_option_menu_get (priv->status, status_map);
    if (status == ICAL_STATUS_NEEDSACTION) {
        e_dialog_spin_set (priv->percent_complete, 0);
        e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), ctime);
        complete_date_changed (tdpage, 0, FALSE);
    } else if (status == ICAL_STATUS_INPROCESS) {
        e_dialog_spin_set (priv->percent_complete, 50);
        e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), ctime);
        complete_date_changed (tdpage, 0, FALSE);
    } else if (status == ICAL_STATUS_COMPLETED) {
        e_dialog_spin_set (priv->percent_complete, 100);
        ctime = time (NULL);
        e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), ctime);
        complete_date_changed (tdpage, ctime, TRUE);
    }

    priv->updating = FALSE;

    comp_editor_page_notify_changed (COMP_EDITOR_PAGE (tdpage));
}

static void
percent_complete_changed (GtkAdjustment *adj, TaskDetailsPage *tdpage)
{
    TaskDetailsPagePrivate *priv;
    gint percent;
    icalproperty_status status;
    gboolean complete;
    time_t ctime = -1;
    
    priv = tdpage->priv;

    if (priv->updating)
        return;
    
    priv->updating = TRUE;

    percent = e_dialog_spin_get_int (priv->percent_complete);
    if (percent == 100) {
        complete = TRUE;
        ctime = time (NULL);
        status = ICAL_STATUS_COMPLETED;
    } else {
        complete = FALSE;

        if (percent == 0)
            status = ICAL_STATUS_NEEDSACTION;
        else
            status = ICAL_STATUS_INPROCESS;
    }

    e_dialog_option_menu_set (priv->status, status, status_map);
    e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), ctime);
    complete_date_changed (tdpage, ctime, complete);

    priv->updating = FALSE;

    comp_editor_page_notify_changed (COMP_EDITOR_PAGE (tdpage));
}

/* 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);

    /* Connect signals. The Status, Percent Complete & Date Completed
       properties are closely related so whenever one changes we may need
       to update the other 2. */
    gtk_signal_connect (GTK_OBJECT (GTK_OPTION_MENU (priv->status)->menu),
                "deactivate",
                GTK_SIGNAL_FUNC (status_changed), tdpage);

    gtk_signal_connect (GTK_OBJECT (GTK_SPIN_BUTTON (priv->percent_complete)->adjustment),
                "value_changed",
                GTK_SIGNAL_FUNC (percent_complete_changed), tdpage);

    /* Priority */
    gtk_signal_connect (GTK_OBJECT (GTK_OPTION_MENU (priv->priority)->menu),
                "deactivate",
                GTK_SIGNAL_FUNC (field_changed_cb), tdpage);

    /* 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);
}



/**
 * 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;
}

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, FALSE);
    e_date_edit_set_allow_no_date_set (E_DATE_EDIT (dedit), TRUE);

    return dedit;
}