gtk2/gtk/gtkradiomenuitem.c
2006-05-02 23:56:43 +00:00

486 lines
13 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include "gtkaccellabel.h"
#include "gtkmarshalers.h"
#include "gtkradiomenuitem.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkalias.h"
enum {
PROP_0,
PROP_GROUP
};
static void gtk_radio_menu_item_destroy (GtkObject *object);
static void gtk_radio_menu_item_activate (GtkMenuItem *menu_item);
static void gtk_radio_menu_item_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_radio_menu_item_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static guint group_changed_signal = 0;
G_DEFINE_TYPE (GtkRadioMenuItem, gtk_radio_menu_item, GTK_TYPE_CHECK_MENU_ITEM);
GtkWidget*
gtk_radio_menu_item_new (GSList *group)
{
GtkRadioMenuItem *radio_menu_item;
radio_menu_item = g_object_new (GTK_TYPE_RADIO_MENU_ITEM, NULL);
gtk_radio_menu_item_set_group (radio_menu_item, group);
return GTK_WIDGET (radio_menu_item);
}
static void
gtk_radio_menu_item_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkRadioMenuItem *radio_menu_item;
radio_menu_item = GTK_RADIO_MENU_ITEM (object);
switch (prop_id)
{
GSList *slist;
case PROP_GROUP:
if (G_VALUE_HOLDS_OBJECT (value))
slist = gtk_radio_menu_item_get_group ((GtkRadioMenuItem*) g_value_get_object (value));
else
slist = NULL;
gtk_radio_menu_item_set_group (radio_menu_item, slist);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_radio_menu_item_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
switch (prop_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
gtk_radio_menu_item_set_group (GtkRadioMenuItem *radio_menu_item,
GSList *group)
{
GtkWidget *old_group_singleton = NULL;
GtkWidget *new_group_singleton = NULL;
g_return_if_fail (GTK_IS_RADIO_MENU_ITEM (radio_menu_item));
g_return_if_fail (!g_slist_find (group, radio_menu_item));
if (radio_menu_item->group)
{
GSList *slist;
radio_menu_item->group = g_slist_remove (radio_menu_item->group, radio_menu_item);
if (radio_menu_item->group && !radio_menu_item->group->next)
old_group_singleton = g_object_ref (radio_menu_item->group->data);
for (slist = radio_menu_item->group; slist; slist = slist->next)
{
GtkRadioMenuItem *tmp_item;
tmp_item = slist->data;
tmp_item->group = radio_menu_item->group;
}
}
if (group && !group->next)
new_group_singleton = g_object_ref (group->data);
radio_menu_item->group = g_slist_prepend (group, radio_menu_item);
if (group)
{
GSList *slist;
for (slist = group; slist; slist = slist->next)
{
GtkRadioMenuItem *tmp_item;
tmp_item = slist->data;
tmp_item->group = radio_menu_item->group;
}
}
else
{
GTK_CHECK_MENU_ITEM (radio_menu_item)->active = TRUE;
/* gtk_widget_set_state (GTK_WIDGET (radio_menu_item), GTK_STATE_ACTIVE);
*/
}
g_object_ref (radio_menu_item);
g_object_notify (G_OBJECT (radio_menu_item), "group");
g_signal_emit (radio_menu_item, group_changed_signal, 0);
if (old_group_singleton)
{
g_signal_emit (old_group_singleton, group_changed_signal, 0);
g_object_unref (old_group_singleton);
}
if (new_group_singleton)
{
g_signal_emit (new_group_singleton, group_changed_signal, 0);
g_object_unref (new_group_singleton);
}
g_object_unref (radio_menu_item);
}
GtkWidget*
gtk_radio_menu_item_new_with_label (GSList *group,
const gchar *label)
{
GtkWidget *radio_menu_item;
GtkWidget *accel_label;
radio_menu_item = gtk_radio_menu_item_new (group);
accel_label = gtk_accel_label_new (label);
gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
gtk_container_add (GTK_CONTAINER (radio_menu_item), accel_label);
gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label), radio_menu_item);
gtk_widget_show (accel_label);
return radio_menu_item;
}
/**
* gtk_radio_menu_item_new_with_mnemonic:
* @group: group the radio menu item is inside
* @label: the text of the button, with an underscore in front of the
* mnemonic character
* @returns: a new #GtkRadioMenuItem
*
* Creates a new #GtkRadioMenuItem containing a label. The label
* will be created using gtk_label_new_with_mnemonic(), so underscores
* in @label indicate the mnemonic for the menu item.
**/
GtkWidget*
gtk_radio_menu_item_new_with_mnemonic (GSList *group,
const gchar *label)
{
GtkWidget *radio_menu_item;
GtkWidget *accel_label;
radio_menu_item = gtk_radio_menu_item_new (group);
accel_label = g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
gtk_label_set_text_with_mnemonic (GTK_LABEL (accel_label), label);
gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
gtk_container_add (GTK_CONTAINER (radio_menu_item), accel_label);
gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label), radio_menu_item);
gtk_widget_show (accel_label);
return radio_menu_item;
}
/**
* gtk_radio_menu_item_new_from_widget:
* @group: An existing #GtkRadioMenuItem
*
* Creates a new #GtkRadioMenuItem adding it to the same group as @group.
*
* Return value: The new #GtkRadioMenuItem
*
* Since: 2.4
**/
GtkWidget *
gtk_radio_menu_item_new_from_widget (GtkRadioMenuItem *group)
{
GSList *list = NULL;
g_return_val_if_fail (GTK_IS_RADIO_MENU_ITEM (group), NULL);
if (group)
list = gtk_radio_menu_item_get_group (group);
return gtk_radio_menu_item_new (list);
}
/**
* gtk_radio_menu_item_new_with_mnemonic_from_widget:
* @group: An existing #GtkRadioMenuItem
* @label: the text of the button, with an underscore in front of the
* mnemonic character
*
* Creates a new GtkRadioMenuItem containing a label. The label will be
* created using gtk_label_new_with_mnemonic(), so underscores in label
* indicate the mnemonic for the menu item.
*
* The new #GtkRadioMenuItem is added to the same group as @group.
*
* Return value: The new #GtkRadioMenuItem
*
* Since: 2.4
**/
GtkWidget *
gtk_radio_menu_item_new_with_mnemonic_from_widget (GtkRadioMenuItem *group,
const gchar *label)
{
GSList *list = NULL;
g_return_val_if_fail (GTK_IS_RADIO_MENU_ITEM (group), NULL);
if (group)
list = gtk_radio_menu_item_get_group (group);
return gtk_radio_menu_item_new_with_mnemonic (list, label);
}
/**
* gtk_radio_menu_item_new_with_label_from_widget:
* @group: an existing #GtkRadioMenuItem
* @label: the text for the label
*
* Creates a new GtkRadioMenuItem whose child is a simple GtkLabel.
* The new #GtkRadioMenuItem is added to the same group as @group.
*
* Return value: The new #GtkRadioMenuItem
*
* Since: 2.4
**/
GtkWidget *
gtk_radio_menu_item_new_with_label_from_widget (GtkRadioMenuItem *group,
const gchar *label)
{
GSList *list = NULL;
g_return_val_if_fail (GTK_IS_RADIO_MENU_ITEM (group), NULL);
if (group)
list = gtk_radio_menu_item_get_group (group);
return gtk_radio_menu_item_new_with_label (list, label);
}
GSList*
gtk_radio_menu_item_get_group (GtkRadioMenuItem *radio_menu_item)
{
g_return_val_if_fail (GTK_IS_RADIO_MENU_ITEM (radio_menu_item), NULL);
return radio_menu_item->group;
}
static void
gtk_radio_menu_item_class_init (GtkRadioMenuItemClass *klass)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkMenuItemClass *menu_item_class;
gobject_class = G_OBJECT_CLASS (klass);
object_class = GTK_OBJECT_CLASS (klass);
menu_item_class = GTK_MENU_ITEM_CLASS (klass);
gobject_class->set_property = gtk_radio_menu_item_set_property;
gobject_class->get_property = gtk_radio_menu_item_get_property;
/**
* GtkRadioMenuItem:group:
*
* The radio menu item whose group this widget belongs to.
*
* Since: 2.8
*/
g_object_class_install_property (gobject_class,
PROP_GROUP,
g_param_spec_object ("group",
P_("Group"),
P_("The radio menu item whose group this widget belongs to."),
GTK_TYPE_RADIO_MENU_ITEM,
GTK_PARAM_WRITABLE));
object_class->destroy = gtk_radio_menu_item_destroy;
menu_item_class->activate = gtk_radio_menu_item_activate;
/**
* GtkStyle::group-changed:
* @style: the object which received the signal
*
* Emitted when the group of radio menu items that a radio menu item belongs
* to changes. This is emitted when a radio menu item switches from
* being alone to being part of a group of 2 or more menu items, or
* vice-versa, and when a buttton is moved from one group of 2 or
* more menu items ton a different one, but not when the composition
* of the group that a menu item belongs to changes.
*
* Since: 2.4
*/
group_changed_signal = g_signal_new (I_("group-changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkRadioMenuItemClass, group_changed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
gtk_radio_menu_item_init (GtkRadioMenuItem *radio_menu_item)
{
radio_menu_item->group = g_slist_prepend (NULL, radio_menu_item);
gtk_check_menu_item_set_draw_as_radio (GTK_CHECK_MENU_ITEM (radio_menu_item), TRUE);
}
static void
gtk_radio_menu_item_destroy (GtkObject *object)
{
GtkWidget *old_group_singleton = NULL;
GtkRadioMenuItem *radio_menu_item;
GtkRadioMenuItem *tmp_menu_item;
GSList *tmp_list;
gboolean was_in_group;
g_return_if_fail (GTK_IS_RADIO_MENU_ITEM (object));
radio_menu_item = GTK_RADIO_MENU_ITEM (object);
was_in_group = radio_menu_item->group && radio_menu_item->group->next;
radio_menu_item->group = g_slist_remove (radio_menu_item->group,
radio_menu_item);
if (radio_menu_item->group && !radio_menu_item->group->next)
old_group_singleton = radio_menu_item->group->data;
tmp_list = radio_menu_item->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
tmp_menu_item->group = radio_menu_item->group;
}
/* this radio menu item is no longer in the group */
radio_menu_item->group = NULL;
if (old_group_singleton)
g_signal_emit (old_group_singleton, group_changed_signal, 0);
if (was_in_group)
g_signal_emit (radio_menu_item, group_changed_signal, 0);
if (GTK_OBJECT_CLASS (gtk_radio_menu_item_parent_class)->destroy)
(* GTK_OBJECT_CLASS (gtk_radio_menu_item_parent_class)->destroy) (object);
}
static void
gtk_radio_menu_item_activate (GtkMenuItem *menu_item)
{
GtkRadioMenuItem *radio_menu_item;
GtkCheckMenuItem *check_menu_item;
GtkCheckMenuItem *tmp_menu_item;
GSList *tmp_list;
gint toggled;
g_return_if_fail (GTK_IS_RADIO_MENU_ITEM (menu_item));
radio_menu_item = GTK_RADIO_MENU_ITEM (menu_item);
check_menu_item = GTK_CHECK_MENU_ITEM (menu_item);
toggled = FALSE;
if (check_menu_item->active)
{
tmp_menu_item = NULL;
tmp_list = radio_menu_item->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
if (tmp_menu_item->active && (tmp_menu_item != check_menu_item))
break;
tmp_menu_item = NULL;
}
if (tmp_menu_item)
{
toggled = TRUE;
check_menu_item->active = !check_menu_item->active;
}
}
else
{
toggled = TRUE;
check_menu_item->active = !check_menu_item->active;
tmp_list = radio_menu_item->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
if (tmp_menu_item->active && (tmp_menu_item != check_menu_item))
{
gtk_menu_item_activate (GTK_MENU_ITEM (tmp_menu_item));
break;
}
}
}
if (toggled)
gtk_check_menu_item_toggled (check_menu_item);
gtk_widget_queue_draw (GTK_WIDGET (radio_menu_item));
}
#define __GTK_RADIO_MENU_ITEM_C__
#include "gtkaliasdef.c"