path: root/calendar/gui/dialogs/meeting-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 version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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 <glib.h>
#include <gtk/gtksignal.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkwindow.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <glade/glade.h>
#include <libgnomeui/gnome-stock.h>
#include <gal/e-table/e-cell-combo.h>
#include <gal/e-table/e-cell-text.h>
#include <gal/e-table/e-table-simple.h>
#include <gal/e-table/e-table-scrolled.h>
#include <gal/widgets/e-unicode.h>
#include <gal/widgets/e-popup-menu.h>
#include <gal/widgets/e-gui-utils.h>
#include <widgets/misc/e-dateedit.h>
#include <e-util/e-dialog-widgets.h>
#include "../component-factory.h"
#include "../e-meeting-attendee.h"
#include "../e-meeting-model.h"
#include "../itip-utils.h"
#include "comp-editor-util.h"
#include "e-delegate-dialog.h"
#include "meeting-page.h"



enum columns {
    MEETING_ATTENDEE_COL,
    MEETING_MEMBER_COL,
    MEETING_TYPE_COL,
    MEETING_ROLE_COL,
    MEETING_RSVP_COL,
    MEETING_DELTO_COL,
    MEETING_DELFROM_COL,
    MEETING_STATUS_COL,
    MEETING_CN_COL,
    MEETING_LANG_COL,
    MEETING_COLUMN_COUNT
};

/* Private part of the MeetingPage structure */
struct _MeetingPagePrivate {
    /* Lists of attendees */
    GPtrArray *deleted_attendees;

    /* To use in case of cancellation */
    CalComponent *comp;
    
    /* List of identities */
    GList *addresses;
    GList *address_strings;
    gchar *default_address;
    
    /* Glade XML data */
    GladeXML *xml;

    /* Widgets from the Glade file */
    GtkWidget *main;
    GtkWidget *organizer_table;
    GtkWidget *organizer;
    GtkWidget *organizer_lbl;
    GtkWidget *other_organizer;
    GtkWidget *other_organizer_lbl;
    GtkWidget *other_organizer_btn;
    GtkWidget *existing_organizer_table;
    GtkWidget *existing_organizer;
    GtkWidget *existing_organizer_btn;
    GtkWidget *invite;
    
    /* E Table stuff */
    EMeetingModel *model;
    ETableScrolled *etable;
    gint row;
    
    /* For handling who the organizer is */
    gboolean other;
    gboolean existing;
        gboolean updating;
};



static void meeting_page_class_init (MeetingPageClass *class);
static void meeting_page_init (MeetingPage *mpage);
static void meeting_page_destroy (GtkObject *object);

static GtkWidget *meeting_page_get_widget (CompEditorPage *page);
static void meeting_page_focus_main_widget (CompEditorPage *page);
static void meeting_page_fill_widgets (CompEditorPage *page, CalComponent *comp);
static gboolean meeting_page_fill_component (CompEditorPage *page, CalComponent *comp);

static gint right_click_cb (ETable *etable, gint row, gint col, GdkEvent *event, gpointer data);

static CompEditorPageClass *parent_class = NULL;



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

    if (!meeting_page_type) {
        static const GtkTypeInfo meeting_page_info = {
            "MeetingPage",
            sizeof (MeetingPage),
            sizeof (MeetingPageClass),
            (GtkClassInitFunc) meeting_page_class_init,
            (GtkObjectInitFunc) meeting_page_init,
            NULL, /* reserved_1 */
            NULL, /* reserved_2 */
            (GtkClassInitFunc) NULL
        };

        meeting_page_type = 
            gtk_type_unique (TYPE_COMP_EDITOR_PAGE,
                     &meeting_page_info);
    }

    return meeting_page_type;
}

/* Class initialization function for the task page */
static void
meeting_page_class_init (MeetingPageClass *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 = meeting_page_get_widget;
    editor_page_class->focus_main_widget = meeting_page_focus_main_widget;
    editor_page_class->fill_widgets = meeting_page_fill_widgets;
    editor_page_class->fill_component = meeting_page_fill_component;
    editor_page_class->set_summary = NULL;
    editor_page_class->set_dates = NULL;

    object_class->destroy = meeting_page_destroy;
}

/* Object initialization function for the task page */
static void
meeting_page_init (MeetingPage *mpage)
{
    MeetingPagePrivate *priv;

    priv = g_new0 (MeetingPagePrivate, 1);
    mpage->priv = priv;

    priv->deleted_attendees = g_ptr_array_new ();

    priv->comp = NULL;
    
    priv->xml = NULL;
    priv->main = NULL;
    priv->invite = NULL;
    
    priv->model = NULL;
    priv->etable = NULL;
    
    priv->updating = FALSE;
}

static void
set_attendees (CalComponent *comp, const GPtrArray *attendees)
{
    GSList *comp_attendees = NULL, *l;
    int i;
    
    for (i = 0; i < attendees->len; i++) {
        EMeetingAttendee *ia = g_ptr_array_index (attendees, i);
        CalComponentAttendee *ca;
        
        ca = e_meeting_attendee_as_cal_component_attendee (ia);
        
        comp_attendees = g_slist_prepend (comp_attendees, ca);
        
    }
    comp_attendees = g_slist_reverse (comp_attendees);
    cal_component_set_attendee_list (comp, comp_attendees);
    
    for (l = comp_attendees; l != NULL; l = l->next)
        g_free (l->data);   
    g_slist_free (comp_attendees);
}

static void
cleanup_attendees (GPtrArray *attendees)
{
    int i;
    
    for (i = 0; i < attendees->len; i++)
        gtk_object_unref (GTK_OBJECT (g_ptr_array_index (attendees, i)));
}

/* Destroy handler for the task page */
static void
meeting_page_destroy (GtkObject *object)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    
    g_return_if_fail (object != NULL);
    g_return_if_fail (IS_MEETING_PAGE (object));

    mpage = MEETING_PAGE (object);
    priv = mpage->priv;

    if (priv->comp != NULL)
        gtk_object_unref (GTK_OBJECT (priv->comp));
    
    cleanup_attendees (priv->deleted_attendees);
    g_ptr_array_free (priv->deleted_attendees, FALSE);
    
    itip_addresses_free (priv->addresses);
    g_list_free (priv->address_strings);

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

    g_free (priv);
    mpage->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 *
meeting_page_get_widget (CompEditorPage *page)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;

    mpage = MEETING_PAGE (page);
    priv = mpage->priv;

    return priv->main;
}

/* focus_main_widget handler for the task page */
static void
meeting_page_focus_main_widget (CompEditorPage *page)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;

    mpage = MEETING_PAGE (page);
    priv = mpage->priv;

    gtk_widget_grab_focus (priv->organizer);
}

/* Fills the widgets with default values */
static void
clear_widgets (MeetingPage *mpage)
{
    MeetingPagePrivate *priv;

    priv = mpage->priv;

    gtk_entry_set_text (GTK_ENTRY (GTK_COMBO (priv->organizer)->entry), "");
    gtk_entry_set_text (GTK_ENTRY (priv->other_organizer), "");
    gtk_label_set_text (GTK_LABEL (priv->existing_organizer), _("None"));

    gtk_widget_show (priv->organizer_table);
    gtk_widget_hide (priv->existing_organizer_table);   

    gtk_widget_hide (priv->other_organizer_lbl);
    gtk_widget_hide (priv->other_organizer);

    priv->existing = FALSE;
    priv->other = FALSE;
}

/* fill_widgets handler for the meeting page */
static void
meeting_page_fill_widgets (CompEditorPage *page, CalComponent *comp)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    CalComponentOrganizer organizer;
    GList *l;
    
    mpage = MEETING_PAGE (page);
    priv = mpage->priv;

    priv->updating = TRUE;
    
    /* Clean out old data */
    if (priv->comp != NULL)
        gtk_object_unref (GTK_OBJECT (priv->comp));
    priv->comp = NULL;
    
    cleanup_attendees (priv->deleted_attendees);

    /* Clean the screen */
    clear_widgets (mpage);

    /* Component for cancellation */
    priv->comp = cal_component_clone (comp);
    
    /* Organizer */
    cal_component_get_organizer (comp, &organizer);
    priv->addresses = itip_addresses_get ();
    for (l = priv->addresses; l != NULL; l = l->next) {
        ItipAddress *a = l->data;
        
        priv->address_strings = g_list_append (priv->address_strings, a->full);
        if (a->default_address)
            priv->default_address = a->full;
    }
    gtk_combo_set_popdown_strings (GTK_COMBO (priv->organizer), priv->address_strings);

    if (organizer.value != NULL) {
        const gchar *strip = itip_strip_mailto (organizer.value);
        gchar *s, *string;

        gtk_widget_hide (priv->organizer_table);
        gtk_widget_show (priv->existing_organizer_table);
        gtk_widget_hide (priv->invite);
        
        if (organizer.cn != NULL)
            string = g_strdup_printf ("%s <%s>", organizer.cn, strip);
        else
            string = g_strdup (strip);
        s = e_utf8_to_gtk_string (priv->existing_organizer, string);
        gtk_label_set_text (GTK_LABEL (priv->existing_organizer), s);
        g_free (s);
        g_free (string);

        priv->existing = TRUE;
    } else {
        gtk_widget_hide (priv->other_organizer_lbl);
        gtk_widget_hide (priv->other_organizer);

        e_dialog_editable_set (GTK_COMBO (priv->organizer)->entry, priv->default_address);
    }

    priv->updating = FALSE;
}

/* fill_component handler for the meeting page */
static gboolean
meeting_page_fill_component (CompEditorPage *page, CalComponent *comp)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    CalComponentOrganizer organizer = {NULL, NULL, NULL, NULL};

    mpage = MEETING_PAGE (page);
    priv = mpage->priv;

    if (!priv->existing) {
        gchar *addr = NULL, *cn = NULL;
        GList *l;
        
        if (priv->other) {
            addr = e_dialog_editable_get (priv->other_organizer);
        } else {
            gchar *str = e_dialog_editable_get (GTK_COMBO (priv->organizer)->entry);
            for (l = priv->addresses; l != NULL; l = l->next) {
                ItipAddress *a = l->data;
                
                if (!strcmp (a->full, str)) {
                    addr = g_strdup (a->address);
                    cn = g_strdup (a->name);
                }
            }
            g_free (str);
        }
        
        if (addr == NULL || strlen (addr) == 0) {
            e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
                  _("An organizer is required."));
            g_free (addr);
            g_free (cn);
            return FALSE;
        } else {
            gchar *tmp;
            
            tmp = addr;
            addr = g_strdup_printf ("MAILTO:%s", addr);
            g_free (tmp);
        }
    
        organizer.value = addr;
        organizer.cn = cn;
        cal_component_set_organizer (comp, &organizer);
        g_free (addr);
        g_free (cn);
    }

    if (e_meeting_model_count_attendees (priv->model) < 1) {
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              "Atleast one attendee is required.");
        return FALSE;
    }
    set_attendees (comp, e_meeting_model_get_attendees (priv->model));
    
    return TRUE;
}



/* Gets the widgets from the XML file and returns if they are all available. */
static gboolean
get_widgets (MeetingPage *mpage)
{
    CompEditorPage *page = COMP_EDITOR_PAGE (mpage);
    MeetingPagePrivate *priv;
    GSList *accel_groups;
    GtkWidget *toplevel;

    priv = mpage->priv;

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

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

    /* Get the GtkAccelGroup from the toplevel window, so we can install
       it when the notebook page is mapped. */
    toplevel = gtk_widget_get_toplevel (priv->main);
    accel_groups = gtk_accel_groups_from_object (GTK_OBJECT (toplevel));
    if (accel_groups) {
        page->accel_group = accel_groups->data;
        gtk_accel_group_ref (page->accel_group);
    }

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

    priv->organizer_table = GW ("organizer-table");
    priv->organizer = GW ("organizer");
    priv->organizer_lbl = GW ("organizer-label");
    priv->other_organizer = GW ("other-organizer");
    priv->other_organizer_lbl = GW ("other-organizer-label");
    priv->other_organizer_btn = GW ("other-organizer-button");
    priv->existing_organizer_table = GW ("existing-organizer-table");
    priv->existing_organizer = GW ("existing-organizer");
    priv->existing_organizer_btn = GW ("existing-organizer-button");
    priv->invite = GW ("invite");
    
#undef GW

    return (priv->invite
        && priv->organizer_table
        && priv->organizer
        && priv->organizer_lbl
        && priv->other_organizer
        && priv->other_organizer_lbl
        && priv->other_organizer_btn
        && priv->existing_organizer_table
        && priv->existing_organizer
        && priv->existing_organizer_btn);
}

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

/* Function called to make the organizer other than the user */
static void
other_clicked_cb (GtkWidget *widget, gpointer data) 
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    
    mpage = MEETING_PAGE (data);
    priv = mpage->priv;

    gtk_widget_hide (priv->organizer_lbl);
    gtk_widget_hide (priv->organizer);
    gtk_widget_hide (priv->other_organizer_btn);
    gtk_widget_show (priv->other_organizer_lbl);
    gtk_widget_show (priv->other_organizer);

    priv->other = TRUE;
}

/* Function called to change the organizer */
static void
change_clicked_cb (GtkWidget *widget, gpointer data) 
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    
    mpage = MEETING_PAGE (data);
    priv = mpage->priv;

    gtk_widget_show (priv->organizer_table);
    gtk_widget_hide (priv->existing_organizer_table);
    gtk_widget_show (priv->invite);

    gtk_combo_set_popdown_strings (GTK_COMBO (priv->organizer), priv->address_strings);
    e_dialog_editable_set (GTK_COMBO (priv->organizer)->entry, priv->default_address);

    priv->existing = FALSE;
}

/* Function called to invite more people */
static void
invite_cb (GtkWidget *widget, gpointer data) 
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    
    mpage = MEETING_PAGE (data);
    priv = mpage->priv;

    e_meeting_model_invite_others_dialog (priv->model);
}

/* Hooks the widget signals */
static void
init_widgets (MeetingPage *mpage)
{
    MeetingPagePrivate *priv;

    priv = mpage->priv;

    /* Organizer */
    gtk_signal_connect (GTK_OBJECT (GTK_COMBO (priv->organizer)->entry), "changed",
                GTK_SIGNAL_FUNC (field_changed_cb), mpage);

    gtk_signal_connect (GTK_OBJECT (priv->other_organizer_btn), "clicked",
                GTK_SIGNAL_FUNC (other_clicked_cb), mpage);
    gtk_signal_connect (GTK_OBJECT (priv->existing_organizer_btn), "clicked",
                GTK_SIGNAL_FUNC (change_clicked_cb), mpage);

    /* Invite button */
    gtk_signal_connect (GTK_OBJECT (priv->invite), "clicked", 
                GTK_SIGNAL_FUNC (invite_cb), mpage);
}

static void
popup_delegate_cb (GtkWidget *widget, gpointer data) 
{
    MeetingPage *mpage = MEETING_PAGE (data);
    MeetingPagePrivate *priv;
    EDelegateDialog *edd;
    GtkWidget *dialog;
    EMeetingAttendee *ia;
    char *address = NULL, *name = NULL;
    
    priv = mpage->priv;

    ia = e_meeting_model_find_attendee_at_row (priv->model, priv->row);

    /* Show dialog. */
    edd = e_delegate_dialog_new (NULL, itip_strip_mailto (e_meeting_attendee_get_delto (ia)));
    dialog = e_delegate_dialog_get_toplevel (edd);

    if (gnome_dialog_run_and_close (GNOME_DIALOG (dialog)) == 0){
        EMeetingAttendee *ic;
        
        name = e_delegate_dialog_get_delegate_name (edd);
        address = e_delegate_dialog_get_delegate (edd);

        /* Make sure we can add the new delegatee person */
        if (e_meeting_model_find_attendee (priv->model, address, NULL) != NULL) {
            e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
                  _("That person is already attending the meeting!"));
            goto cleanup;
        }
        
        /* Update information for attendee */
        if (e_meeting_attendee_is_set_delto (ia)) {
            EMeetingAttendee *ib;
            
            ib = e_meeting_model_find_attendee (priv->model, itip_strip_mailto (e_meeting_attendee_get_delto (ia)), NULL);
            if (ib != NULL) {
                gtk_object_ref (GTK_OBJECT (ib));
                g_ptr_array_add (priv->deleted_attendees, ib);
                
                e_meeting_model_remove_attendee (priv->model, ib);
            }           
        }
        e_meeting_attendee_set_delto (ia, g_strdup_printf ("MAILTO:%s", address));

        /* Construct delegatee information */
        ic = e_meeting_model_add_attendee_with_defaults (priv->model);
        
        e_meeting_attendee_set_address (ic, g_strdup_printf ("MAILTO:%s", address));
        e_meeting_attendee_set_delfrom (ic, g_strdup (e_meeting_attendee_get_address (ia)));
        e_meeting_attendee_set_cn (ic, g_strdup (name));
    }

 cleanup:
    g_free (name);
    g_free (address);
    gtk_object_unref (GTK_OBJECT (edd));
}

static void
popup_delete_cb (GtkWidget *widget, gpointer data) 
{
    MeetingPage *mpage = MEETING_PAGE (data);
    MeetingPagePrivate *priv;
    EMeetingAttendee *ia;
    int pos = 0;
    
    priv = mpage->priv;

    ia = e_meeting_model_find_attendee_at_row (priv->model, priv->row);

    /* If this was a delegatee, no longer delegate */
    if (e_meeting_attendee_is_set_delfrom (ia)) {
        EMeetingAttendee *ib;
        
        ib = e_meeting_model_find_attendee (priv->model, e_meeting_attendee_get_delfrom (ia), &pos);
        if (ib != NULL)
            e_meeting_attendee_set_delto (ib, NULL);
    }
    
    /* Handle deleting all attendees in the delegation chain */ 
    while (ia != NULL) {
        EMeetingAttendee *ib = NULL;

        gtk_object_ref (GTK_OBJECT (ia));
        g_ptr_array_add (priv->deleted_attendees, ia);
        e_meeting_model_remove_attendee (priv->model, ia);

        if (e_meeting_attendee_get_delto (ia) != NULL)
            ib = e_meeting_model_find_attendee (priv->model, e_meeting_attendee_get_delto (ia), NULL);
        ia = ib;
    }
}

enum {
    CAN_DELEGATE = 2,
    CAN_DELETE = 4
};

static EPopupMenu context_menu[] = {
    { N_("_Delegate To..."),              NULL,
      GTK_SIGNAL_FUNC (popup_delegate_cb),NULL,  CAN_DELEGATE },

    E_POPUP_SEPARATOR,

    { N_("_Delete"),                      GNOME_STOCK_MENU_TRASH,
      GTK_SIGNAL_FUNC (popup_delete_cb),  NULL,  CAN_DELETE },
    
    E_POPUP_TERMINATOR
};

/* handle context menu over message-list */
static gint
right_click_cb (ETable *etable, gint row, gint col, GdkEvent *event, gpointer data)
{
    MeetingPage *mpage = MEETING_PAGE (data);
    MeetingPagePrivate *priv;
    GtkMenu *menu;
    int enable_mask = 0, hide_mask = 0;

    priv = mpage->priv;

    priv->row = row;

    menu = e_popup_menu_create (context_menu, enable_mask, hide_mask, data);
    e_auto_kill_popup_menu_on_hide (menu);
    
    gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
            event->button.button, event->button.time);

    return TRUE;
}



/**
 * meeting_page_construct:
 * @mpage: An task details page.
 * 
 * Constructs an task page by loading its Glade data.
 * 
 * Return value: The same object as @mpage, or NULL if the widgets could not 
 * be created.
 **/
MeetingPage *
meeting_page_construct (MeetingPage *mpage, EMeetingModel *emm)
{
    MeetingPagePrivate *priv;
    ETable *real_table;
    gchar *filename;
    
    priv = mpage->priv;

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

    if (!get_widgets (mpage)) {
        g_message ("meeting_page_construct(): "
               "Could not find all widgets in the XML file!");
        return NULL;
    }
    
    /* The etable displaying attendees and their status */
    gtk_object_ref (GTK_OBJECT (emm));
    priv->model = emm;

    filename = g_strdup_printf ("%s/config/et-header-meeting-page", evolution_dir);
    priv->etable = e_meeting_model_etable_from_model (priv->model, 
                              EVOLUTION_ETSPECDIR "/meeting-page.etspec", 
                              filename);
    g_free (filename);

    real_table = e_table_scrolled_get_table (priv->etable);
    gtk_signal_connect (GTK_OBJECT (real_table),
                "right_click", GTK_SIGNAL_FUNC (right_click_cb), mpage);

    gtk_widget_show (GTK_WIDGET (priv->etable));
    gtk_box_pack_start (GTK_BOX (priv->main), GTK_WIDGET (priv->etable), TRUE, TRUE, 2);
    
    /* Init the widget signals */
    init_widgets (mpage);

    return mpage;
}

/**
 * meeting_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.
 **/
MeetingPage *
meeting_page_new (EMeetingModel *emm)
{
    MeetingPage *mpage;

    mpage = gtk_type_new (TYPE_MEETING_PAGE);
    if (!meeting_page_construct (mpage, emm)) {
        gtk_object_unref (GTK_OBJECT (mpage));
        return NULL;
    }

    return mpage;
}

/**
 * meeting_page_get_cancel_comp:
 * @mpage: 
 * 
 * 
 * 
 * Return value: 
 **/
CalComponent *
meeting_page_get_cancel_comp (MeetingPage *mpage)
{
    MeetingPagePrivate *priv;

    g_return_val_if_fail (mpage != NULL, NULL);
    g_return_val_if_fail (IS_MEETING_PAGE (mpage), NULL);

    priv = mpage->priv;

    if (priv->deleted_attendees->len == 0)
        return NULL;
    
    set_attendees (priv->comp, priv->deleted_attendees);
    
    return cal_component_clone (priv->comp);
}