path: root/e-util/e-gtk-utils.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-gtk-utils.c
 *
 * Copyright (C) 2000  Helix Code, 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.
 *
 * Author: Ettore Perazzoli
 */


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtksignal.h>
#include "e-gtk-utils.h"


/* (Cut and pasted from Gtk.)  */

typedef struct DisconnectInfo {
    unsigned int signal_handler;

    GtkObject *object1;
    unsigned int disconnect_handler1;

    GtkObject *object2;
    unsigned int disconnect_handler2;
} DisconnectInfo;

static unsigned int
alive_disconnecter (GtkObject *object,
            DisconnectInfo *info)
{
    g_assert (info != NULL);

    gtk_signal_disconnect (info->object1, info->disconnect_handler1);
    gtk_signal_disconnect (info->object1, info->signal_handler);
    gtk_signal_disconnect (info->object2, info->disconnect_handler2);
    
    g_free (info);
    
    return 0;
}

/**
 * e_gtk_signal_connect_full_while_alive:
 * @object: 
 * @name: 
 * @func: 
 * @marshal: 
 * @data: 
 * @destroy_func: 
 * @object_signal: 
 * @after: 
 * @alive_object: 
 * 
 * Connect a signal like `gtk_signal_connect_while_alive()', but with full
 * params like `gtk_signal_connect_full()'.
 **/
void
e_gtk_signal_connect_full_while_alive (GtkObject *object,
                       const char *name,
                       GtkSignalFunc func,
                       GtkCallbackMarshal marshal,
                       void *data,
                       GtkDestroyNotify destroy_func,
                       gboolean object_signal,
                       gboolean after,
                       GtkObject *alive_object)
{
    DisconnectInfo *info;
    
    g_return_if_fail (GTK_IS_OBJECT (object));
    g_return_if_fail (name != NULL);
    g_return_if_fail (func != NULL);
    g_return_if_fail (GTK_IS_OBJECT (alive_object));
    
    info = g_new (DisconnectInfo, 1);

    info->signal_handler = gtk_signal_connect_full (object, name,
                            func, marshal, data,
                            destroy_func,
                            object_signal, after);

    info->object1 = object;
    info->disconnect_handler1 = gtk_signal_connect (object, "destroy",
                            GTK_SIGNAL_FUNC (alive_disconnecter), info);

    info->object2 = alive_object;
    info->disconnect_handler2 = gtk_signal_connect (alive_object, "destroy",
                            GTK_SIGNAL_FUNC (alive_disconnecter), info);
}

/**
 * gtk_radio_button_get_nth_selected:
 * @button: A GtkRadioButton
 *
 * Returns an int indicating which button in the radio group is
 * toggled active.  NOTE: radio group item numbering starts at zero.
 **/
int
gtk_radio_button_get_nth_selected (GtkRadioButton *button)
{
    GSList *l;
    int i, c;

    g_return_val_if_fail (button != NULL, 0);
    g_return_val_if_fail (GTK_IS_RADIO_BUTTON (button), 0);
    
    c = g_slist_length (button->group);

    for (i = 0, l = button->group; l; l = l->next, i++) {
        GtkRadioButton *tmp = l->data;

        if (GTK_TOGGLE_BUTTON (tmp)->active)
            return c - i - 1;
    }

    return 0;
}

/**
 * gtk_radio_button_select_nth:
 * @button: A GtkRadioButton
 * @n: Which button to select from the group
 *
 * Select the Nth item of a radio group.  NOTE: radio group items
 * start numbering from zero
 **/
void
gtk_radio_button_select_nth (GtkRadioButton *button, int n)
{
    GSList *l;
    int len;

    g_return_if_fail (button != NULL);
    g_return_if_fail (GTK_IS_RADIO_BUTTON (button));    
        
    len = g_slist_length (button->group);

    if ((n <= len) && (n > 0)) {
        l = g_slist_nth (button->group, len - n - 1);
        gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (l->data), TRUE);
    }
           
}