path: root/calendar/gui/dialogs/meeting-page.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 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/gtkcombo.h>
#include <gtk/gtksignal.h>
#include <gtk/gtktogglebutton.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkwindow.h>
#include <libgnome/gnome-i18n.h>
#include <glade/glade.h>
#include <libgnomeui/gnome-stock-icons.h>
#include <gal/widgets/e-gui-utils.h>
#include <widgets/misc/e-dateedit.h>
#include <e-util/e-dialog-utils.h>
#include <e-util/e-dialog-widgets.h>

#include "../calendar-component.h"
#include "../e-meeting-attendee.h"
#include "../e-meeting-store.h"
#include "../e-meeting-list-view.h"
#include "../itip-utils.h"
#include "comp-editor-util.h"
#include "e-delegate-dialog.h"
#include "meeting-page.h"
#include "../e-cal-popup.h"

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

    /* To use in case of cancellation */
    ECalComponent *comp;
    
    /* List of identities */
    EAccountList *accounts;
    EMeetingAttendee *ia;
    char *default_address;
    
    /* Glade XML data */
    GladeXML *xml;

    /* Widgets from the Glade file */
    GtkWidget *main;
    GtkWidget *list_box;
    GtkWidget *organizer_table;
    GtkWidget *organizer;
    GtkWidget *existing_organizer_table;
    GtkWidget *existing_organizer;
    GtkWidget *existing_organizer_btn;
    GtkWidget *add;
    GtkWidget *remove;
    GtkWidget *invite;
    GtkWidget *att_label;

    /* ListView stuff */
    EMeetingStore *model;
    EMeetingListView *list_view;
    gint row;
    
    /* For handling who the organizer is */
    gboolean user_org;
    gboolean existing;
    
        gboolean updating;
};



static void meeting_page_finalize (GObject *object);

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

G_DEFINE_TYPE (MeetingPage, meeting_page, TYPE_COMP_EDITOR_PAGE);

/* Class initialization function for the task page */
static void
meeting_page_class_init (MeetingPageClass *class)
{
    CompEditorPageClass *editor_page_class;
    GObjectClass *object_class;

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

    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->finalize = meeting_page_finalize;
}

/* 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->accounts = NULL;
    priv->ia = NULL;
    priv->default_address = NULL;
    
    priv->xml = NULL;
    priv->main = NULL;
    priv->invite = NULL;
    
    priv->model = NULL;
    priv->list_view = NULL;
    
    priv->updating = FALSE;
}

static EAccount *
get_current_account (MeetingPage *mpage)
{   
    MeetingPagePrivate *priv;
    EIterator *it;
    const char *str;
    
    priv = mpage->priv;

    str = gtk_entry_get_text (GTK_ENTRY (GTK_COMBO (priv->organizer)->entry));
    if (!str)
        return NULL;
    
    for (it = e_list_get_iterator((EList *)priv->accounts); e_iterator_is_valid(it); e_iterator_next(it)) {
        EAccount *a = (EAccount *)e_iterator_get(it);
        char *full = g_strdup_printf("%s <%s>", a->id->name, a->id->address);

        if (!strcmp (full, str)) {
            g_free (full);
            g_object_unref (it);

            return a;
        }
    
        g_free (full);
    }
    g_object_unref (it);
    
    return NULL;    
}

static void
set_attendees (ECalComponent *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);
        ECalComponentAttendee *ca;
        
        ca = e_meeting_attendee_as_e_cal_component_attendee (ia);
        
        comp_attendees = g_slist_prepend (comp_attendees, ca);
        
    }
    comp_attendees = g_slist_reverse (comp_attendees);
    e_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++)
        g_object_unref (g_ptr_array_index (attendees, i));
}

/* Destroy handler for the task page */
static void
meeting_page_finalize (GObject *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)
        g_object_unref (priv->comp);
    
    cleanup_attendees (priv->deleted_attendees);
    g_ptr_array_free (priv->deleted_attendees, TRUE);

    if (priv->ia != NULL)
        g_object_unref (priv->ia);
    
    g_object_unref (priv->model);
    
    if (priv->main)
        gtk_widget_unref (priv->main);

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

    if (priv->default_address) {
        g_free (priv->default_address);
        priv->default_address = NULL;
    }

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

    if (G_OBJECT_CLASS (meeting_page_parent_class)->finalize)
        (* G_OBJECT_CLASS (meeting_page_parent_class)->finalize) (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), priv->default_address);
    gtk_label_set_text (GTK_LABEL (priv->existing_organizer), _("None"));

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

    priv->existing = FALSE;
    priv->user_org = TRUE;
}

static void
sensitize_widgets (MeetingPage *mpage)
{
    gboolean read_only = FALSE, user_org;
    MeetingPagePrivate *priv = mpage->priv;
    GError *error = NULL;
    
    if (!e_cal_is_read_only (COMP_EDITOR_PAGE (mpage)->client, &read_only, &error)) {
        if (error->code != E_CALENDAR_STATUS_BUSY)
            read_only = TRUE;
        g_error_free (error);
    }   
    gtk_widget_set_sensitive (priv->organizer, !read_only);
    gtk_widget_set_sensitive (priv->existing_organizer_btn, !read_only);
    gtk_widget_set_sensitive (priv->add, !read_only && priv->user_org);
    gtk_widget_set_sensitive (priv->remove, !read_only && priv->user_org);
    gtk_widget_set_sensitive (priv->invite, !read_only && priv->user_org);
    gtk_widget_set_sensitive (GTK_WIDGET (priv->list_view), !read_only);
}

/* fill_widgets handler for the meeting page */
static gboolean
meeting_page_fill_widgets (CompEditorPage *page, ECalComponent *comp)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    ECalComponentOrganizer organizer;
    
    mpage = MEETING_PAGE (page);
    priv = mpage->priv;

    priv->updating = TRUE;
    
    /* Clean out old data */
    if (priv->comp != NULL)
        g_object_unref (priv->comp);
    priv->comp = NULL;
    
    cleanup_attendees (priv->deleted_attendees);
    g_ptr_array_set_size (priv->deleted_attendees, 0);
    
    /* Clean the screen */
    clear_widgets (mpage);

    /* Component for cancellation */
    priv->comp = e_cal_component_clone (comp);
    
    /* If there is an existing organizer show it properly */
    if (e_cal_component_has_organizer (comp)) {
        e_cal_component_get_organizer (comp, &organizer);
        if (organizer.value != NULL) {
            const gchar *strip = itip_strip_mailto (organizer.value);
            gchar *string;

            gtk_widget_hide (priv->organizer_table);
            gtk_widget_show (priv->existing_organizer_table);
            if (itip_organizer_is_user (comp, page->client)) {
                gtk_widget_set_sensitive (priv->invite, TRUE);
                gtk_widget_set_sensitive (priv->add, TRUE);
                gtk_widget_set_sensitive (priv->remove, TRUE);
                if (e_cal_get_static_capability (
                        page->client,
                        CAL_STATIC_CAPABILITY_ORGANIZER_NOT_EMAIL_ADDRESS))
                    gtk_widget_hide (priv->existing_organizer_btn);
                priv->user_org = TRUE;
            } else {
                if (e_cal_get_static_capability (
                        page->client,
                        CAL_STATIC_CAPABILITY_ORGANIZER_NOT_EMAIL_ADDRESS))
                    gtk_widget_hide (priv->existing_organizer_btn);
                gtk_widget_set_sensitive (priv->invite, FALSE);
                gtk_widget_set_sensitive (priv->add, FALSE);
                gtk_widget_set_sensitive (priv->remove, FALSE);
                priv->user_org = FALSE;
            }
            
            if (organizer.cn != NULL)
                string = g_strdup_printf ("%s <%s>", organizer.cn, strip);
            else
                string = g_strdup (strip);
            gtk_label_set_text (GTK_LABEL (priv->existing_organizer), string);
            g_free (string);

            priv->existing = TRUE;
        }
    } else {
        EAccount *a;
        
        a = get_current_account (mpage);
        if (a != NULL) {
            priv->ia = e_meeting_store_add_attendee_with_defaults (priv->model);
            g_object_ref (priv->ia);

            e_meeting_attendee_set_address (priv->ia, g_strdup_printf ("MAILTO:%s", a->id->address));
            e_meeting_attendee_set_cn (priv->ia, g_strdup (a->id->name));
            e_meeting_attendee_set_status (priv->ia, ICAL_PARTSTAT_ACCEPTED);
        }
    }
    
    priv->updating = FALSE;

    sensitize_widgets (mpage);

    return TRUE;
}

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

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

    if (!priv->existing) {
        EAccount *a;
        gchar *addr = NULL;

        /* Find the identity for the organizer or sentby field */
        a = get_current_account (mpage);
        
        /* Sanity Check */
        if (a == NULL) {
            e_notice (page, GTK_MESSAGE_ERROR,
                  _("The organizer selected no longer has an account."));
            return FALSE;           
        }
        
        if (a->id->address == NULL || strlen (a->id->address) == 0) {
            e_notice (page, GTK_MESSAGE_ERROR,
                  _("An organizer is required."));
            return FALSE;
        } 

        addr = g_strdup_printf ("MAILTO:%s", a->id->address);
    
        organizer.value = addr;
        organizer.cn = a->id->name;
        e_cal_component_set_organizer (comp, &organizer);

        g_free (addr);
    }

    if (e_meeting_store_count_actual_attendees (priv->model) < 1) {
        e_notice (page, GTK_MESSAGE_ERROR,
              _("At least one attendee is required."));
        return FALSE;
    }
    set_attendees (comp, e_meeting_store_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;

    priv->list_box = GW ("list-box");

    /* 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 (G_OBJECT (toplevel));
    if (accel_groups) {
        page->accel_group = accel_groups->data;
        gtk_accel_group_ref (page->accel_group);
    }

    gtk_widget_ref (priv->main);
    gtk_container_remove (GTK_CONTAINER (priv->main->parent), priv->main);

    /* For making the user the organizer */
    priv->organizer_table = GW ("organizer-table");
    priv->organizer = GW ("organizer");
    gtk_combo_set_value_in_list (GTK_COMBO (priv->organizer), FALSE, FALSE);
    gtk_entry_set_editable (GTK_ENTRY (GTK_COMBO (priv->organizer)->entry), FALSE);

    /* For showing existing organizers */
    priv->existing_organizer_table = GW ("existing-organizer-table");
    priv->existing_organizer = GW ("existing-organizer");
    priv->existing_organizer_btn = GW ("existing-organizer-button");

    /* Buttons */
    priv->add = GW ("add-attendee");
    priv->remove = GW ("remove-attendee");
    priv->invite = GW ("invite");

    /* Attendees Label */
    priv->att_label = GW ("attendees-label");

#undef GW

    return (priv->list_box
        && priv->att_label
        && priv->invite
        && priv->add
        && priv->remove
        && priv->organizer_table
        && priv->organizer
        && priv->existing_organizer_table
        && priv->existing_organizer
        && priv->existing_organizer_btn);
}

static void
org_changed_cb (GtkWidget *widget, gpointer data)
{
    MeetingPage *mpage;
    MeetingPagePrivate *priv;
    
    mpage = MEETING_PAGE (data);
    priv = mpage->priv;

    if (priv->updating)
        return;
    
    if (!priv->existing && priv->ia != NULL) {
        EAccount *a;
        
        a = get_current_account (mpage);
        if (a != NULL) {
            e_meeting_attendee_set_address (priv->ia, g_strdup_printf ("MAILTO:%s", a->id->address));
            e_meeting_attendee_set_cn (priv->ia, g_strdup (a->id->name));
            
            if (!e_meeting_store_find_attendee (priv->model, e_meeting_attendee_get_address (priv->ia), NULL))
                e_meeting_store_add_attendee (priv->model, priv->ia);
        } else {
            e_meeting_store_remove_attendee (priv->model, priv->ia);
        }
    }
        
    comp_editor_page_notify_changed (COMP_EDITOR_PAGE (mpage));
}

/* 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_set_sensitive (priv->invite, TRUE);
    gtk_widget_set_sensitive (priv->add, TRUE);
    gtk_widget_set_sensitive (priv->remove, TRUE);

    comp_editor_page_notify_changed (COMP_EDITOR_PAGE (mpage));
    
    priv->existing = FALSE;
    priv->user_org = TRUE;
}

static void
add_clicked_cb (GtkButton *btn, MeetingPage *mpage)
{
    EMeetingAttendee *attendee;
    
    attendee = e_meeting_store_add_attendee_with_defaults (mpage->priv->model);
    e_meeting_list_view_edit (mpage->priv->list_view, attendee);
}

static gboolean
existing_attendee (EMeetingAttendee *ia, ECalComponent *comp) 
{
    GSList *attendees, *l;
    const gchar *ia_address;
    
    ia_address = itip_strip_mailto (e_meeting_attendee_get_address (ia));
    if (!ia_address)
        return FALSE;
    
    e_cal_component_get_attendee_list (comp, &attendees);

    for (l = attendees; l; l = l->next) {
        ECalComponentAttendee *attendee = l->data;
        const char *address;
        
        address = itip_strip_mailto (attendee->value);
        if (address && !g_strcasecmp (ia_address, address)) {
            e_cal_component_free_attendee_list (attendees);
            return TRUE;
        }
    }
    
    e_cal_component_free_attendee_list (attendees);
    
    return FALSE;
}

static void
remove_attendee (MeetingPage *mpage, EMeetingAttendee *ia) 
{
    MeetingPagePrivate *priv;
    int pos = 0;
    
    priv = mpage->priv;

    /* If the user deletes the organizer attendee explicitly,
       assume they no longer want the organizer showing up */
    if (ia == priv->ia) {
        g_object_unref (priv->ia);
        priv->ia = NULL;
    }   
        
    /* If this was a delegatee, no longer delegate */
    if (e_meeting_attendee_is_set_delfrom (ia)) {
        EMeetingAttendee *ib;
        
        ib = e_meeting_store_find_attendee (priv->model, e_meeting_attendee_get_delfrom (ia), &pos);
        if (ib != NULL) {
            e_meeting_attendee_set_delto (ib, NULL);
            e_meeting_attendee_set_edit_level (ib,  E_MEETING_ATTENDEE_EDIT_FULL);
        }       
    }
    
    /* Handle deleting all attendees in the delegation chain */ 
    while (ia != NULL) {
        EMeetingAttendee *ib = NULL;

        if (existing_attendee (ia, priv->comp)) {
            g_object_ref (ia);
            g_ptr_array_add (priv->deleted_attendees, ia);
        }
        
        if (e_meeting_attendee_get_delto (ia) != NULL)
            ib = e_meeting_store_find_attendee (priv->model, e_meeting_attendee_get_delto (ia), NULL);
        e_meeting_store_remove_attendee (priv->model, ia);

        ia = ib;
    }

    sensitize_widgets (mpage);
}

static void
remove_attendee_at_row (MeetingPage *mpage, int row) 
{
    MeetingPagePrivate *priv;
    EMeetingAttendee *ia;
    
    priv = mpage->priv;

    ia = e_meeting_store_find_attendee_at_row (priv->model, row);
    remove_attendee (mpage, ia);
}

static void
remove_clicked_cb (GtkButton *btn, MeetingPage *mpage)
{
    MeetingPagePrivate *priv;
    EMeetingAttendee *ia;
    GtkTreeSelection *selection;
    GtkTreeIter iter;
    GtkTreePath *path;
    gboolean valid_iter;
    char *address;
    
    priv = mpage->priv;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->list_view));
    if (!gtk_tree_selection_get_selected (selection, NULL, &iter)) {
        g_warning ("Could not get a selection to delete.");
        return;
    }
    path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->model), &iter);   
    
    gtk_tree_model_get (GTK_TREE_MODEL (priv->model), &iter, E_MEETING_STORE_ADDRESS_COL, &address, -1);
    ia = e_meeting_store_find_attendee (priv->model, address, NULL);
    g_free (address);
    if (!ia)
        return;
    
    remove_attendee (mpage, ia);

    /* Select closest item after removal */
    valid_iter = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->model), &iter, path);
    if (!valid_iter) {
        gtk_tree_path_prev (path);
        valid_iter = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->model), &iter, path);
    }

    if (valid_iter)
        gtk_tree_selection_select_iter (selection, &iter);

    gtk_tree_path_free (path);
}

/* 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_list_view_invite_others_dialog (priv->list_view);
}

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

    priv = mpage->priv;

    /* Organizer */
    g_signal_connect (GTK_COMBO (priv->organizer)->entry, "changed",
              G_CALLBACK (org_changed_cb), mpage);

    g_signal_connect (priv->existing_organizer_btn, "clicked",
              G_CALLBACK (change_clicked_cb), mpage);

    /* Add attendee button */
    g_signal_connect (priv->add, "clicked", G_CALLBACK (add_clicked_cb), mpage);

    /* Remove attendee button */
    g_signal_connect (priv->remove, "clicked", G_CALLBACK (remove_clicked_cb), mpage);

    /* Contacts button */
    g_signal_connect(priv->invite, "clicked", G_CALLBACK (invite_cb), mpage);
}

static void
client_changed_cb (CompEditorPage *page, ECal *client, gpointer user_data)
{
    MeetingPage *mpage = MEETING_PAGE (page);

    sensitize_widgets (mpage);
}

static void
popup_delete_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    MeetingPage *mpage = data;
    MeetingPagePrivate *priv;
    
    priv = mpage->priv;

    remove_attendee_at_row (mpage, priv->row);
}

enum {
    CAN_DELEGATE = 2,
    CAN_DELETE = 4
};

static EPopupItem context_menu_items[] = {
#if 0
    { E_POPUP_ITEM, "00.delegate", N_("_Delegate To..."), popup_delegate_cb, NULL, NULL, CAN_DELEGATE },
    { E_POPUP_BAR, "05.bar" },
#endif
    { E_POPUP_ITEM, "10.delete", N_("_Remove"), popup_delete_cb, NULL, GTK_STOCK_REMOVE, CAN_DELETE },
};

static void
context_popup_free(EPopup *ep, GSList *items, void *data)
{
    g_slist_free(items);
}

static gint
button_press_event (GtkWidget *widget, GdkEventButton *event, MeetingPage *mpage)
{
    MeetingPagePrivate *priv;
    GtkMenu *menu;
    EMeetingAttendee *ia;
    GtkTreePath *path;
    GtkTreeIter iter;
    char *address;
    int disable_mask = 0;
    GSList *menus = NULL;
    ECalPopup *ep;
    int i;

    priv = mpage->priv;

    /* only process right-clicks */
    if (event->button != 3 || event->type != GDK_BUTTON_PRESS)
        return FALSE;

    /* only if we right-click on an attendee */
    if (!gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->list_view), event->x, event->y, &path, NULL, NULL, NULL))
        return FALSE;
    if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->model), &iter, path))
        return FALSE;
    
    gtk_tree_model_get (GTK_TREE_MODEL (priv->model), &iter, E_MEETING_STORE_ADDRESS_COL, &address, -1);
    ia = e_meeting_store_find_attendee (priv->model, address, &priv->row);
    g_free (address);
    if (!ia)
        return FALSE;
    
    if (e_meeting_attendee_get_edit_level (ia) != E_MEETING_ATTENDEE_EDIT_FULL)
        disable_mask = CAN_DELETE;

    ep = e_cal_popup_new("org.gnome.evolution.calendar.meeting.popup");
    for (i=0;i<sizeof(context_menu_items)/sizeof(context_menu_items[0]);i++)
        menus = g_slist_prepend(menus, &context_menu_items[i]);

    e_popup_add_items((EPopup *)ep, menus, NULL, context_popup_free, mpage);
    menu = e_popup_create_menu_once((EPopup *)ep, NULL, disable_mask);
    gtk_menu_popup (menu, NULL, NULL, NULL, NULL, event->button, event->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, EMeetingStore *ems,
            ECal *client)
{
    MeetingPagePrivate *priv;
    char *backend_address;
    EIterator *it;
    EAccount *def_account;
    GList *address_strings = NULL, *l;
    GtkWidget *sw;
    
    priv = mpage->priv;

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

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

    /* Address information */
    if (!e_cal_get_cal_address (client, &backend_address, NULL))
        return NULL;

    priv->accounts = itip_addresses_get ();
    def_account = itip_addresses_get_default();
    for (it = e_list_get_iterator((EList *)priv->accounts);
         e_iterator_is_valid(it);
         e_iterator_next(it)) {
        EAccount *a = (EAccount *)e_iterator_get(it);
        char *full;
        
        full = g_strdup_printf("%s <%s>", a->id->name, a->id->address);

        address_strings = g_list_append(address_strings, full);

        /* Note that the address specified by the backend gets
         * precedence over the default mail address.
         */
        if (backend_address && !strcmp (backend_address, a->id->address)) {
            if (priv->default_address)
                g_free (priv->default_address);
            
            priv->default_address = g_strdup (full);
        } else if (a == def_account && !priv->default_address) {
            priv->default_address = g_strdup (full);
        }
    }
    g_object_unref(it);
    g_free (backend_address);

    if (address_strings)
        gtk_combo_set_popdown_strings (GTK_COMBO (priv->organizer), address_strings);
    else
        g_warning ("No potential organizers!");

    for (l = address_strings; l != NULL; l = l->next)
        g_free (l->data);
    g_list_free (address_strings);
    
    /* The etable displaying attendees and their status */
    g_object_ref (ems);
    priv->model = ems;

    priv->list_view = e_meeting_list_view_new (priv->model); 
    g_signal_connect (G_OBJECT (priv->list_view), "button_press_event", G_CALLBACK (button_press_event), mpage);

    gtk_widget_show (GTK_WIDGET (priv->list_view));
    sw = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
    gtk_widget_show (sw);
    gtk_container_add (GTK_CONTAINER (sw), GTK_WIDGET (priv->list_view));
    gtk_box_pack_start (GTK_BOX (priv->list_box), sw, TRUE, TRUE, 0);
    
    /* Set the mnemonic widget for the Attendees label */
    gtk_label_set_mnemonic_widget (GTK_LABEL (priv->att_label), GTK_WIDGET (priv->list_view));

    /* Init the widget signals */
    init_widgets (mpage);

    g_signal_connect_after (G_OBJECT (mpage), "client_changed",
                G_CALLBACK (client_changed_cb), NULL);

    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 (EMeetingStore *ems, ECal *client)
{
    MeetingPage *mpage;

    mpage = g_object_new (TYPE_MEETING_PAGE, NULL);
    if (!meeting_page_construct (mpage, ems, client)) {
        g_object_unref (mpage);
        return NULL;
    }

    return mpage;
}

/**
 * meeting_page_get_cancel_comp:
 * @mpage: 
 * 
 * 
 * 
 * Return value: 
 **/
ECalComponent *
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 e_cal_component_clone (priv->comp);
}