path: root/calendar/gui/dialogs/task-editor.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 * Author :
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 2000, Helix Code, Inc.
 * Copyright 2000, 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
 */

/*
 * TaskEditor - a GtkObject which handles a libglade-loaded dialog to edit
 * tasks.
 */

#include <config.h>
#include <glade/glade.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <gal/util/e-util.h>
#include <gal/widgets/e-unicode.h>
#include <gal/widgets/e-categories.h>
#include <e-util/e-dialog-widgets.h>
#include <widgets/misc/e-dateedit.h>
#include <cal-util/timeutil.h>
#include "delete-comp.h"
#include "save-comp.h"
#include "task-editor.h"
#include "../calendar-config.h"
#include "../widget-util.h"


typedef struct {
    /* Glade XML data */
    GladeXML *xml;

    /* Client to use */
    CalClient *client;

    /* Calendar component we are editing; this is an internal copy and is
     * not one of the read-only objects from the parent calendar.
     */
    CalComponent *comp;


    /* This is TRUE while we are setting the widget values. We just return
       from any signal handlers. */
    gboolean ignore_callbacks;

    /* Widgets from the Glade file */

    GtkWidget *app;

    GtkWidget *summary;

    GtkWidget *due_date;
    GtkWidget *start_date;

    GtkWidget *percent_complete;

    GtkWidget *status;
    GtkWidget *priority;

    GtkWidget *description;

    GtkWidget *classification_public;
    GtkWidget *classification_private;
    GtkWidget *classification_confidential;

    GtkWidget *contacts;
    GtkWidget *categories_btn;
    GtkWidget *categories;

    GtkWidget *completed_date;
    GtkWidget *url;

    /* Call task_editor_set_changed() to set this to TRUE when any field
       in the dialog is changed. When the user closes the dialog we will
       prompt to save changes. */
    gboolean changed;
} TaskEditorPrivate;


/* 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 const int classification_map[] = {
    CAL_COMPONENT_CLASS_PUBLIC,
    CAL_COMPONENT_CLASS_PRIVATE,
    CAL_COMPONENT_CLASS_CONFIDENTIAL,
    -1
};

static void task_editor_class_init (TaskEditorClass *class);
static void task_editor_init (TaskEditor *tedit);
static void tedit_apply_event_cb (GtkWidget *widget, gint page_num, gpointer data);
static gint tedit_close_event_cb (GtkWidget *widget, gpointer data);
static gint tedit_delete_event_cb (GtkWidget *widget, GdkEvent *event, gpointer data);
static void close_dialog (TaskEditor *tedit);
static gboolean get_widgets (TaskEditor *tedit);
static void init_widgets (TaskEditor *tedit);
static void task_editor_destroy (GtkObject *object);
static char * make_title_from_comp (CalComponent *comp);
static void set_title_from_comp (TaskEditor *tedit, CalComponent *comp);
static void clear_widgets (TaskEditor *tedit);
static void fill_widgets (TaskEditor *tedit);

static void save_todo_object (TaskEditor *tedit);
static void dialog_to_comp_object (TaskEditor *tedit);

static void obj_updated_cb (CalClient *client, const char *uid, gpointer data);
static void obj_removed_cb (CalClient *client, const char *uid, gpointer data);
static void raise_and_focus (GtkWidget *widget);

static TaskEditorPriority priority_value_to_index (int priority_value);
static int priority_index_to_value (TaskEditorPriority priority);

static void completed_changed       (EDateEdit  *dedit,
                     TaskEditor *tedit);
static void status_changed      (GtkMenu    *menu,
                     TaskEditor *tedit);
static void percent_complete_changed    (GtkAdjustment  *adj,
                     TaskEditor *tedit);
static void field_changed       (GtkWidget  *widget,
                     TaskEditor *tedit);
static void task_editor_set_changed (TaskEditor *tedit,
                     gboolean    changed);
static gboolean prompt_to_save_changes  (TaskEditor *tedit);
static CalComponentClassification classification_get (GtkWidget *widget);
static void categories_clicked          (GtkWidget      *button,
                     TaskEditor     *editor);

/* The function libglade calls to create the EDateEdit widgets in the GUI. */
GtkWidget * task_editor_create_date_edit (void);

static GtkObjectClass *parent_class;

E_MAKE_TYPE(task_editor, "TaskEditor", TaskEditor,
        task_editor_class_init, task_editor_init, GTK_TYPE_OBJECT)


static void
task_editor_class_init (TaskEditorClass *class)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) class;

    parent_class = gtk_type_class (GTK_TYPE_OBJECT);

    object_class->destroy = task_editor_destroy;
}


static void
task_editor_init (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = g_new0 (TaskEditorPrivate, 1);
    tedit->priv = priv;

    priv->ignore_callbacks = FALSE;

    task_editor_set_changed (tedit, FALSE);
}


/**
 * task_editor_new:
 * @Returns: a new #TaskEditor.
 *
 * Creates a new #TaskEditor.
 **/
TaskEditor *
task_editor_new (void)
{
    TaskEditor *tedit;

    tedit = TASK_EDITOR (gtk_type_new (task_editor_get_type ()));
    return task_editor_construct (tedit);
}

/**
 * task_editor_construct:
 * @tedit: A #TaskEditor.
 *
 * Constructs a task editor by loading its Glade XML file.
 *
 * Return value: The same object as @tedit, or NULL if the widgets could not be
 * created.  In the latter case, the task editor will automatically be
 * destroyed.
 **/
TaskEditor *
task_editor_construct (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    g_return_val_if_fail (tedit != NULL, NULL);
    g_return_val_if_fail (IS_TASK_EDITOR (tedit), NULL);

    priv = tedit->priv;

    /* Load the content widgets */

    priv->xml = glade_xml_new (EVOLUTION_GLADEDIR "/task-editor-dialog.glade", NULL);
    if (!priv->xml) {
        g_message ("task_editor_construct(): Could not load the Glade XML file!");
        goto error;
    }

    if (!get_widgets (tedit)) {
        g_message ("task_editor_construct(): Could not find all widgets in the XML file!");
        goto error;
    }

    init_widgets (tedit);

    /* Hook to destruction of the dialog */
    gtk_signal_connect (GTK_OBJECT (priv->app), "apply",
                GTK_SIGNAL_FUNC (tedit_apply_event_cb), tedit); 
    gtk_signal_connect (GTK_OBJECT (priv->app), "close",
                GTK_SIGNAL_FUNC (tedit_close_event_cb), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->app), "delete_event",
                GTK_SIGNAL_FUNC (tedit_delete_event_cb), tedit);

    /* Add focus to the summary entry */
    gtk_widget_grab_focus (GTK_WIDGET (priv->summary));


    return tedit;

 error:

    gtk_object_unref (GTK_OBJECT (tedit));
    return NULL;
}


/* Called by libglade to create our custom EDateEdit widgets. */
GtkWidget *
task_editor_create_date_edit (void)
{
    GtkWidget *dedit;

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

    return dedit;
}

/* Callback used when the dialog box is destroyed */
static void
tedit_apply_event_cb (GtkWidget *widget, gint page_num, gpointer data)
{
    TaskEditor *tedit;

    g_return_if_fail (IS_TASK_EDITOR (data));

    tedit = TASK_EDITOR (data);

    if (page_num != -1)
        return;
    
    save_todo_object (tedit);
}

/* Callback used when the dialog box is destroyed */
static gint
tedit_close_event_cb (GtkWidget *widget, gpointer data)
{
    TaskEditor *tedit;

    g_return_val_if_fail (IS_TASK_EDITOR (data), TRUE);

    tedit = TASK_EDITOR (data);

    if (prompt_to_save_changes (tedit))
        close_dialog (tedit);

    return TRUE;
}

/* Callback used when the dialog box is destroyed */
static gint
tedit_delete_event_cb (GtkWidget *widget, GdkEvent *event, gpointer data)
{
    TaskEditor *tedit;

    g_return_val_if_fail (IS_TASK_EDITOR (data), TRUE);

    tedit = TASK_EDITOR (data);

    if (prompt_to_save_changes (tedit))
        close_dialog (tedit);

    return TRUE;
}


/* Closes the dialog box and emits the appropriate signals */
static void
close_dialog (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

    g_assert (priv->app != NULL);

    gtk_object_destroy (GTK_OBJECT (tedit));
}


/* Gets the widgets from the XML file and returns if they are all available.
 * For the widgets whose values can be simply set with e-dialog-utils, it does
 * that as well.
 */
static gboolean
get_widgets (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

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

    priv->app = GW ("task-editor-dialog");

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

    priv->due_date = GW ("due-date");
    priv->start_date = GW ("start-date");

    priv->percent_complete = GW ("percent-complete");

    priv->status = GW ("status");
    priv->priority = GW ("priority");

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

    priv->classification_public = GW ("classification-public");
    priv->classification_private = GW ("classification-private");
    priv->classification_confidential = GW ("classification-confidential");

    priv->contacts = GW ("contacts");
    priv->categories_btn = GW ("categories-button");
    priv->categories = GW ("categories");

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

#undef GW

    return (priv->app
        && priv->summary
        && priv->due_date
        && priv->start_date
        && priv->percent_complete
        && priv->status
        && priv->priority
        && priv->classification_public
        && priv->classification_private
        && priv->classification_confidential
        && priv->description
        && priv->contacts
        && priv->categories_btn
        && priv->categories
        && priv->completed_date 
        && priv->url);
}


/* Hooks the widget signals */
static void
init_widgets (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

    /* 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 (priv->completed_date), "changed",
                GTK_SIGNAL_FUNC (completed_changed), tedit);

    gtk_signal_connect (GTK_OBJECT (GTK_OPTION_MENU (priv->status)->menu),
                "deactivate",
                GTK_SIGNAL_FUNC (status_changed), tedit);

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

    /* Classification */
    gtk_signal_connect (GTK_OBJECT (priv->description), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->classification_public),
                "toggled",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->classification_private),
                "toggled",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->classification_confidential),
                "toggled",
                GTK_SIGNAL_FUNC (field_changed), tedit);

    /* Connect the default signal handler to use to make sure the "changed"
       field gets set whenever a field is changed. */
    gtk_signal_connect (GTK_OBJECT (priv->summary), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->due_date), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->start_date), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (GTK_OPTION_MENU (priv->priority)->menu),
                "deactivate",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->description), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->contacts), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->categories), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);
    gtk_signal_connect (GTK_OBJECT (priv->url), "changed",
                GTK_SIGNAL_FUNC (field_changed), tedit);

    /* Button clicks */
    gtk_signal_connect (GTK_OBJECT (priv->categories_btn), "clicked",
                GTK_SIGNAL_FUNC (categories_clicked), tedit);
}

static void
task_editor_destroy (GtkObject *object)
{
    TaskEditor *tedit;
    TaskEditorPrivate *priv;

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

    tedit = TASK_EDITOR (object);
    priv = tedit->priv;

    if (priv->app) {
        gtk_widget_destroy (priv->app);
        priv->app = NULL;
    }

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

    if (priv->client) {
        gtk_signal_disconnect_by_data (GTK_OBJECT (priv->client),
                           tedit);
        gtk_object_unref (GTK_OBJECT (priv->client));
        priv->client = NULL;
    }

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

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

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


void
task_editor_set_cal_client (TaskEditor *tedit,
                CalClient *client)
{
    TaskEditorPrivate *priv;

    g_return_if_fail (tedit != NULL);
    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    if (client == priv->client)
        return;

    if (client)
        g_return_if_fail (IS_CAL_CLIENT (client));

    if (client)
        g_return_if_fail (cal_client_get_load_state (client) == CAL_CLIENT_LOAD_LOADED);

    if (client)
        gtk_object_ref (GTK_OBJECT (client));

    if (priv->client) {
        gtk_signal_disconnect_by_data (GTK_OBJECT (priv->client),
                           tedit);
        gtk_object_unref (GTK_OBJECT (priv->client));
    }

    priv->client = client;

    if (priv->client) {
        gtk_signal_connect (GTK_OBJECT (priv->client), "obj_updated",
                    GTK_SIGNAL_FUNC (obj_updated_cb), tedit);
        gtk_signal_connect (GTK_OBJECT (priv->client), "obj_removed",
                    GTK_SIGNAL_FUNC (obj_removed_cb), tedit);
    }
}


/* Callback used when the calendar client tells us that an object changed */
static void
obj_updated_cb (CalClient *client, const char *uid, gpointer data)
{
    /* FIXME: Do something sensible if the component changes under our feet */
#if 0
    TaskEditor *tedit;
    TaskEditorPrivate *priv;
    CalComponent *comp;
    CalClientGetStatus status;
    const gchar *editing_uid;

    tedit = TASK_EDITOR (data);

    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    /* If we aren't showing the object which has been updated, return. */
    if (!priv->comp)
      return;
    cal_component_get_uid (priv->comp, &editing_uid);
    if (strcmp (uid, editing_uid))
      return;


    /* Get the task from the server. */
    status = cal_client_get_object (priv->client, uid, &comp);

    switch (status) {
    case CAL_CLIENT_GET_SUCCESS:
        /* Everything is fine */
        break;

    case CAL_CLIENT_GET_SYNTAX_ERROR:
        g_message ("obj_updated_cb(): Syntax error when getting object `%s'", uid);
        return;

    case CAL_CLIENT_GET_NOT_FOUND:
        /* The object is no longer in the server, so do nothing */
        return;

    default:
        g_assert_not_reached ();
        return;
    }

    raise_and_focus (priv->app);
#endif
}

/* Callback used when the calendar client tells us that an object was removed */
static void
obj_removed_cb (CalClient *client, const char *uid, gpointer data)
{
    /* FIXME: Do something sensible if the component is removed under our
         * feet.
     */
#if 0
    TaskEditor *tedit;
    TaskEditorPrivate *priv;
    const gchar *editing_uid;

    tedit = TASK_EDITOR (data);

    g_return_if_fail (tedit != NULL);
    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    /* If we aren't showing the object which has been updated, return. */
    if (!priv->comp)
      return;
    cal_component_get_uid (priv->comp, &editing_uid);
    if (strcmp (uid, editing_uid))
      return;


    raise_and_focus (priv->app);
#endif
}


/* Brings attention to a window by raising it and giving it focus */
static void
raise_and_focus (GtkWidget *widget)
{
    g_assert (GTK_WIDGET_REALIZED (widget));
    gdk_window_show (widget->window);
    gtk_widget_grab_focus (widget);
}


/**
 * task_editor_set_todo_object:
 * @tedit: A #TaskEditor.
 * @comp: A todo object.
 *
 * Sets the todo object that a task editor dialog will manipulate.
 **/
void
task_editor_set_todo_object (TaskEditor *tedit,
                 CalComponent   *comp)
{
    TaskEditorPrivate *priv;

    g_return_if_fail (tedit != NULL);
    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

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

    if (comp)
        priv->comp = cal_component_clone (comp);

    set_title_from_comp (tedit, priv->comp);
    fill_widgets (tedit);
}

void
task_editor_focus (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    g_return_if_fail (tedit != NULL);
    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;
    gtk_widget_show_now (priv->app);
    raise_and_focus (priv->app);
}

/* Creates an appropriate title for the task editor dialog */
static char *
make_title_from_comp (CalComponent *comp)
{
    const char *summary;
    CalComponentVType type;
    CalComponentText text;

    if (!comp)
        return g_strdup (_("Edit Task"));

    cal_component_get_summary (comp, &text);
    if (text.value)
        summary = text.value;
    else
        summary =  _("No summary");


    type = cal_component_get_vtype (comp);
    switch (type) {
    case CAL_COMPONENT_EVENT:
        return g_strdup_printf (_("Appointment - %s"), summary);

    case CAL_COMPONENT_TODO:
        return g_strdup_printf (_("Task - %s"), summary);

    case CAL_COMPONENT_JOURNAL:
        return g_strdup_printf (_("Journal entry - %s"), summary);

    default:
        g_message ("make_title_from_comp(): Cannot handle object of type %d", type);
        return NULL;
    }
}

/* Sets the event editor's window title from a calendar component */
static void
set_title_from_comp (TaskEditor *tedit, CalComponent *comp)
{
    TaskEditorPrivate *priv;
    char *title, *tmp;

    priv = tedit->priv;

    title = make_title_from_comp (comp);
    tmp = e_utf8_to_gtk_string (priv->app, title);
    g_free (title);

    if (tmp) {
        gtk_window_set_title (GTK_WINDOW (priv->app), tmp);
        g_free (tmp);
    } else {
        g_message ("set_title_from_comp(): Could not convert the title from UTF8");
        gtk_window_set_title (GTK_WINDOW (priv->app), "");
    }
}

/* Fills the widgets with default values */
static void
clear_widgets (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;


}

/* Fills in the widgets with the proper values */
static void
fill_widgets (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;
    CalComponentText text;
    CalComponentDateTime d;
    CalComponentClassification cl;
    struct icaltimetype *completed;
    GSList *l;
    time_t t;
    int *priority_value, *percent;
    icalproperty_status status;
    TaskEditorPriority priority;
    const char *url;
    const char *categories;

    priv = tedit->priv;

    task_editor_set_changed (tedit, FALSE);

    clear_widgets (tedit);

    if (!priv->comp)
        return;

    /* We want to ignore any signals emitted while changing fields. */
    priv->ignore_callbacks = TRUE;


    cal_component_get_summary (priv->comp, &text);
    e_dialog_editable_set (priv->summary, text.value);

    cal_component_get_description_list (priv->comp, &l);
    if (l) {
        text = *(CalComponentText *)l->data;
        e_dialog_editable_set (priv->description, text.value);
    } else {
        e_dialog_editable_set (priv->description, NULL);
    }
    cal_component_free_text_list (l);

    /* Due Date. */
    cal_component_get_due (priv->comp, &d);
    if (d.value) {
        t = icaltime_as_timet (*d.value);
    } else {
        t = -1;
    }
    e_date_edit_set_time (E_DATE_EDIT (priv->due_date), t);

    /* Start Date. */
    cal_component_get_dtstart (priv->comp, &d);
    if (d.value) {
        t = icaltime_as_timet (*d.value);
    } else {
        t = -1;
    }
    e_date_edit_set_time (E_DATE_EDIT (priv->start_date), t);

    /* Completed Date. */
    cal_component_get_completed (priv->comp, &completed);
    if (completed) {
        t = icaltime_as_timet (*completed);
        cal_component_free_icaltimetype (completed);
    } else {
        t = -1;
    }
    e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), t);

    /* Percent Complete. */
    cal_component_get_percent (priv->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 (priv->comp, &status);
    if (status == ICAL_STATUS_NONE) {
        /* Try to user 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);

    /* Priority. */
    cal_component_get_priority (priv->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);


    /* Classification. */
    cal_component_get_classification (priv->comp, &cl);

    switch (cl) {
    case CAL_COMPONENT_CLASS_PUBLIC:
            e_dialog_radio_set (priv->classification_public, CAL_COMPONENT_CLASS_PUBLIC,
                    classification_map);
    case CAL_COMPONENT_CLASS_PRIVATE:
            e_dialog_radio_set (priv->classification_public, CAL_COMPONENT_CLASS_PRIVATE,
                    classification_map);
    case CAL_COMPONENT_CLASS_CONFIDENTIAL:
            e_dialog_radio_set (priv->classification_public, CAL_COMPONENT_CLASS_CONFIDENTIAL,
                    classification_map);
    default:
        /* What do do?  We can't g_assert_not_reached() since it is a
         * value from an external file.
         */
    }

    /* Categories */
    cal_component_get_categories (priv->comp, &categories);
    e_dialog_editable_set (priv->categories, categories);

    /* URL. */
    cal_component_get_url (priv->comp, &url);
    e_dialog_editable_set (priv->url, url);

    priv->ignore_callbacks = FALSE;
}


static void
save_todo_object (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

    g_return_if_fail (priv->client != NULL);

    if (!priv->comp)
        return;

    dialog_to_comp_object (tedit);
    set_title_from_comp (tedit, priv->comp);

    if (!cal_client_update_object (priv->client, priv->comp))
        g_message ("save_todo_object(): Could not update the object!");
    else
        task_editor_set_changed (tedit, FALSE);
}


/* Get the values of the widgets in the event editor and put them in the iCalObject */
static void
dialog_to_comp_object (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;
    CalComponent *comp;
    CalComponentDateTime date;
    time_t t;
    icalproperty_status status;
    TaskEditorPriority priority;
    int priority_value, percent;
    char *url, *cat;
    char *str;

    priv = tedit->priv;
    comp = priv->comp;

    /* Summary. */

    str = e_dialog_editable_get (priv->summary);
    if (!str || strlen (str) == 0)
        cal_component_set_summary (comp, NULL);
    else {
        CalComponentText text;

        text.value = str;
        text.altrep = NULL;

        cal_component_set_summary (comp, &text);
    }

    if (str)
        g_free (str);

    /* Description */

    str = e_dialog_editable_get (priv->description);
    if (!str || strlen (str) == 0)
        cal_component_set_description_list (comp, NULL);
    else {
        GSList l;
        CalComponentText text;

        text.value = str;
        text.altrep = NULL;
        l.data = &text;
        l.next = NULL;

        cal_component_set_description_list (comp, &l);
    }

    if (!str)
        g_free (str);

    /* Dates */

    date.value = g_new (struct icaltimetype, 1);
    date.tzid = NULL;

    /* Due Date. */
    t = e_date_edit_get_time (E_DATE_EDIT (priv->due_date));
    if (t != -1) {
        *date.value = icaltime_from_timet (t, FALSE);
        cal_component_set_due (comp, &date);
    } else {
        cal_component_set_due (comp, NULL);
    }

    /* Start Date. */
    t = e_date_edit_get_time (E_DATE_EDIT (priv->start_date));
    if (t != -1) {
        *date.value = icaltime_from_timet (t, FALSE);
        cal_component_set_dtstart (comp, &date);
    } else {
        cal_component_set_dtstart (comp, NULL);
    }

    /* Completed Date. */
    t = e_date_edit_get_time (E_DATE_EDIT (priv->completed_date));
    if (t != -1) {
        *date.value = icaltime_from_timet (t, FALSE);
        cal_component_set_completed (comp, date.value);
    } else {
        cal_component_set_completed (comp, NULL);
    }

    g_free (date.value);

    /* 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);

    /* Classification. */
    cal_component_set_classification (comp, classification_get (priv->classification_public));

    /* Categories */
    cat = e_dialog_editable_get (priv->categories);
    cal_component_set_categories (comp, cat);

    if (cat)
        g_free (cat);

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

    if (url)
        g_free (url);

    cal_component_commit_sequence (comp);
}

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;
}


static void
completed_changed   (EDateEdit  *dedit,
             TaskEditor *tedit)
{
    TaskEditorPrivate *priv;
    time_t t;

    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    if (priv->ignore_callbacks)
        return;

    task_editor_set_changed (tedit, TRUE);

    priv->ignore_callbacks = TRUE;
    t = e_date_edit_get_time (E_DATE_EDIT (priv->completed_date));
    if (t == -1) {
        /* If the 'Completed Date' is set to 'None', we set the
           status to 'Not Started' and the percent-complete to 0.
           The task may actually be partially-complete, but we leave
           it to the user to set those fields. */
        e_dialog_option_menu_set (priv->status, ICAL_STATUS_NEEDSACTION,
                      status_map);
        e_dialog_spin_set (priv->percent_complete, 0);
    } else {
        e_dialog_option_menu_set (priv->status, ICAL_STATUS_COMPLETED,
                      status_map);
        e_dialog_spin_set (priv->percent_complete, 100);
    }
    priv->ignore_callbacks = FALSE;
}


static void
status_changed      (GtkMenu    *menu,
             TaskEditor *tedit)
{
    TaskEditorPrivate *priv;
    icalproperty_status status;

    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    if (priv->ignore_callbacks)
        return;

    task_editor_set_changed (tedit, TRUE);

    status = e_dialog_option_menu_get (priv->status, status_map);
    priv->ignore_callbacks = TRUE;
    if (status == ICAL_STATUS_NEEDSACTION) {
        e_dialog_spin_set (priv->percent_complete, 0);
        e_date_edit_set_time (E_DATE_EDIT (priv->completed_date), -1);
    } else if (status == ICAL_STATUS_COMPLETED) {
        e_dialog_spin_set (priv->percent_complete, 100);
        e_date_edit_set_time (E_DATE_EDIT (priv->completed_date),
                      time (NULL));
    }
    priv->ignore_callbacks = FALSE;
}


static void
percent_complete_changed    (GtkAdjustment  *adj,
                 TaskEditor *tedit)
{
    TaskEditorPrivate *priv;
    gint percent;
    icalproperty_status status;
    time_t date_completed;

    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    if (priv->ignore_callbacks)
        return;

    task_editor_set_changed (tedit, TRUE);

    percent = e_dialog_spin_get_int (priv->percent_complete);
    priv->ignore_callbacks = TRUE;

    if (percent == 100) {
        date_completed = time (NULL);
        status = ICAL_STATUS_COMPLETED;
    } else {
        /* FIXME: Set to 'None'. */
        date_completed = time (NULL);

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

    e_date_edit_set_time (E_DATE_EDIT (priv->completed_date),
                  date_completed);
    e_dialog_option_menu_set (priv->status, status, status_map);

    priv->ignore_callbacks = FALSE;
}

/* Decode the radio button group for classifications */
static CalComponentClassification
classification_get (GtkWidget *widget)
{
    return e_dialog_radio_get (widget, classification_map);
}


/* This is called when all fields except those handled above (status, percent
   complete & completed date) are changed. It just sets the "changed" flag. */
static void
field_changed           (GtkWidget  *widget,
                 TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    g_return_if_fail (IS_TASK_EDITOR (tedit));

    priv = tedit->priv;

    if (priv->ignore_callbacks)
        return;

    task_editor_set_changed (tedit, TRUE);
}


static void
task_editor_set_changed     (TaskEditor *tedit,
                 gboolean    changed)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

#if 0
    g_print ("In task_editor_set_changed: %s\n",
         changed ? "TRUE" : "FALSE");
#endif

    priv->changed = changed;

    if (priv->app)
        gnome_property_box_set_state (GNOME_PROPERTY_BOX (priv->app), changed);
}


/* This checks if the "changed" field is set, and if so it prompts to save
   the changes using a "Save/Discard/Cancel" modal dialog. It then saves the
   changes if requested. It returns TRUE if the dialog should now be closed. */
static gboolean
prompt_to_save_changes      (TaskEditor *tedit)
{
    TaskEditorPrivate *priv;

    priv = tedit->priv;

    if (!priv->changed)
        return TRUE;

    switch (save_component_dialog (GTK_WINDOW (priv->app))) {
    case 0: /* Save */
        /* FIXME: If an error occurs here, we should popup a dialog
           and then return FALSE. */
        save_todo_object (tedit);
        return TRUE;
    case 1: /* Discard */
        return TRUE;
    case 2: /* Cancel */
    default:
        return FALSE;
        break;
    }

}

static void
categories_clicked(GtkWidget *button, TaskEditor *tedit)
{
    char *categories;
    GnomeDialog *dialog;
    int result;
    GtkWidget *entry;

    entry = ((TaskEditorPrivate *)tedit->priv)->categories;
    categories = e_utf8_gtk_entry_get_text (GTK_ENTRY (entry));

    dialog = GNOME_DIALOG (e_categories_new (categories));
    result = gnome_dialog_run (dialog);
    g_free (categories);

    if (result == 0) {
        gtk_object_get (GTK_OBJECT (dialog),
                "categories", &categories,
                NULL);
        e_utf8_gtk_entry_set_text (GTK_ENTRY (entry), categories);
        g_free (categories);
    }
    gtk_object_destroy (GTK_OBJECT (dialog));
}