path: root/widgets/misc/e-source-option-menu.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-source-option-menu.c
 *
 * Copyright (C) 2003  Novell, Inc.
 *
 * 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.
 *
 * Author: Ettore Perazzoli <ettore@ximian.com>
 */

#include <config.h>

#include "e-source-option-menu.h"

#include "e-util-marshal.h"

#include <gal/util/e-util.h>

#include <gtk/gtkmenu.h>
#include <gtk/gtkmenuitem.h>


#define PARENT_TYPE gtk_option_menu_get_type ()
static GtkOptionMenuClass *parent_class = NULL;


/* We set data on each menu item specifying the corresponding ESource using this key.  */
#define MENU_ITEM_SOURCE_DATA_ID    "ESourceOptionMenu:Source"


struct _ESourceOptionMenuPrivate {
    ESourceList *source_list;

    ESource *selected_source;
};


enum {
    SOURCE_SELECTED,
    NUM_SIGNALS
};

static uint signals[NUM_SIGNALS] = { 0 };


/* Selecting a source.  */

typedef struct {
    ESourceOptionMenu *option_menu;
    int i;
} ForeachMenuItemData;

static void
select_source_foreach_menu_item (GtkWidget *menu_item,
                 ForeachMenuItemData *data)
{
    ESource *source = gtk_object_get_data (GTK_OBJECT (menu_item), MENU_ITEM_SOURCE_DATA_ID);

    if (source == data->option_menu->priv->selected_source)
        gtk_option_menu_set_history (GTK_OPTION_MENU (data->option_menu), data->i);

    data->i ++;
}

static void
select_source (ESourceOptionMenu *menu,
           ESource *source)
{
    ForeachMenuItemData *foreach_data;

    if (menu->priv->selected_source != NULL)
        g_object_unref (menu->priv->selected_source);
    menu->priv->selected_source = source;

    foreach_data = g_new0 (ForeachMenuItemData, 1);
    foreach_data->option_menu = menu;

    gtk_container_foreach (GTK_CONTAINER (GTK_OPTION_MENU (menu)->menu),
                   (GtkCallback) select_source_foreach_menu_item, foreach_data);

    g_free (foreach_data);
    g_object_ref (source);

    g_signal_emit (menu, signals[SOURCE_SELECTED], 0, source);
}


/* Menu callback.  */

static void
menu_item_activate_callback (GtkMenuItem *menu_item,
                 ESourceOptionMenu *option_menu)
{
    ESource *source = gtk_object_get_data (GTK_OBJECT (menu_item), MENU_ITEM_SOURCE_DATA_ID);

    if (source != NULL)
        select_source (option_menu, source);
}


/* Functions to keep the menu in sync with the ESourceList.  */

static void
populate (ESourceOptionMenu *option_menu)
{
    GtkWidget *menu = gtk_menu_new ();
    GSList *groups = e_source_list_peek_groups (option_menu->priv->source_list);
    GSList *p;
    ESource *first_source = NULL;
    int first_source_item = -1;
    int selected_item = -1;
    int i;

    i = 0;
    for (p = groups; p != NULL; p = p->next) {
        ESourceGroup *group = E_SOURCE_GROUP (p->data);
        GtkWidget *item = gtk_menu_item_new_with_label (e_source_group_peek_name (group));
        GSList *q;

        gtk_widget_set_sensitive (item, FALSE);
        gtk_widget_show (item);
        gtk_menu_append (GTK_MENU (menu), item);

        i ++;

        for (q = e_source_group_peek_sources (group); q != NULL; q = q->next) {
            ESource *source = E_SOURCE (q->data);
            char *label = g_strconcat ("    ", e_source_peek_name (source), NULL);
            GtkWidget *item = gtk_menu_item_new_with_label (label);

            gtk_object_set_data_full (GTK_OBJECT (item), MENU_ITEM_SOURCE_DATA_ID, source,
                          (GtkDestroyNotify) g_object_unref);
            g_object_ref (source);

            g_signal_connect (item, "activate", G_CALLBACK (menu_item_activate_callback), option_menu);

            gtk_widget_show (item);
            gtk_menu_append (GTK_MENU (menu), item);

            if (first_source_item == -1) {
                first_source_item = i;
                first_source = source;
            }

            if (source == option_menu->priv->selected_source)
                selected_item = i;

            i ++;
        }
    }

    gtk_option_menu_set_menu (GTK_OPTION_MENU (option_menu), menu);

    if (selected_item != -1) {
        gtk_option_menu_set_history (GTK_OPTION_MENU (option_menu), selected_item);
    } else {
        if (option_menu->priv->selected_source != NULL)
            g_object_unref (option_menu->priv->selected_source);
        option_menu->priv->selected_source = first_source;
        if (option_menu->priv->selected_source != NULL)
            g_object_ref (option_menu->priv->selected_source);

        gtk_option_menu_set_history (GTK_OPTION_MENU (option_menu), first_source_item);
    }
}


static void
source_list_changed_callback (ESourceList *list,
                  ESourceOptionMenu *menu)
{
    populate (menu);
}

static void
connect_signals (ESourceOptionMenu *menu)
{
    g_signal_connect_object (menu->priv->source_list, "changed",
                 G_CALLBACK (source_list_changed_callback), G_OBJECT (menu), 0);
}


/* GObject methods.  */

static void
impl_dispose (GObject *object)
{
    ESourceOptionMenuPrivate *priv = E_SOURCE_OPTION_MENU (object)->priv;

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

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

    (* G_OBJECT_CLASS (parent_class)->dispose) (object);
}

static void
impl_finalize (GObject *object)
{
    ESourceOptionMenuPrivate *priv = E_SOURCE_OPTION_MENU (object)->priv;

    g_free (priv);

    (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}


/* Initialization.  */

static void
class_init (ESourceOptionMenuClass *class)
{
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    object_class->dispose  = impl_dispose;
    object_class->finalize = impl_finalize;

    parent_class = g_type_class_peek_parent (class);

    signals[SOURCE_SELECTED] = 
        g_signal_new ("source_selected",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (ESourceOptionMenuClass, source_selected),
                  NULL, NULL,
                  e_util_marshal_VOID__POINTER,
                  G_TYPE_NONE, 1,
                  G_TYPE_POINTER);
}

static void
init (ESourceOptionMenu *source_option_menu)
{
    ESourceOptionMenuPrivate *priv;

    priv = g_new0 (ESourceOptionMenuPrivate, 1);

    source_option_menu->priv = priv;
}


/* Public methods.  */

GtkWidget *
e_source_option_menu_new (ESourceList *source_list)
{
    ESourceOptionMenu *menu;

    g_return_val_if_fail (E_IS_SOURCE_LIST (source_list), NULL);

    menu = g_object_new (e_source_option_menu_get_type (), NULL);

    menu->priv->source_list = source_list;
    g_object_ref (source_list);

    connect_signals (menu);
    populate (menu);

    return GTK_WIDGET (menu);
}


ESource *
e_source_option_menu_peek_selected  (ESourceOptionMenu *menu)
{
    g_return_val_if_fail (E_IS_SOURCE_OPTION_MENU (menu), NULL);

    return menu->priv->selected_source;
}


void
e_source_option_menu_select (ESourceOptionMenu *menu,
                 ESource *source)
{
    g_return_if_fail (E_IS_SOURCE_OPTION_MENU (menu));
    g_return_if_fail (E_IS_SOURCE (source));

    select_source (menu, source);
}


E_MAKE_TYPE (e_source_option_menu, "ESourceOptionMenu", ESourceOptionMenu, class_init, init, PARENT_TYPE)