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gtk2/gtk/gtkradiomenuitem.c

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/* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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 "gtkactivatable.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "a11y/gtkradiomenuitemaccessible.h"
/**
* SECTION:gtkradiomenuitem
* @Short_description: A choice from multiple check menu items
* @Title: GtkRadioMenuItem
* @See_also: #GtkMenuItem, #GtkCheckMenuItem
*
* A radio menu item is a check menu item that belongs to a group. At each
* instant exactly one of the radio menu items from a group is selected.
*
* The group list does not need to be freed, as each #GtkRadioMenuItem will
* remove itself and its list item when it is destroyed.
*
* The correct way to create a group of radio menu items is approximatively
* this:
*
* <example>
* <title>How to create a group of radio menu items.</title>
* <programlisting>
* GSList *group = NULL;
* GtkWidget *item;
* gint i;
*
* for (i = 0; i < 5; i++)
* {
* item = gtk_radio_menu_item_new_with_label (group, "This is an example");
* group = gtk_radio_menu_item_get_group (GTK_RADIO_MENU_ITEM (item));
* if (i == 1)
* gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item), TRUE);
* }
* </programlisting>
* </example>
*/
struct _GtkRadioMenuItemPrivate
{
GSList *group;
};
enum {
PROP_0,
PROP_GROUP
};
static void gtk_radio_menu_item_destroy (GtkWidget *widget);
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_WITH_PRIVATE (GtkRadioMenuItem, gtk_radio_menu_item, GTK_TYPE_CHECK_MENU_ITEM)
/**
* gtk_radio_menu_item_new:
* @group: (element-type GtkRadioMenuItem): the group to which the
* radio menu item is to be attached
*
* Creates a new #GtkRadioMenuItem.
*
* Returns: a new #GtkRadioMenuItem
*/
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:
slist = g_value_get_object (value);
if (slist)
slist = gtk_radio_menu_item_get_group ((GtkRadioMenuItem*) g_value_get_object (value));
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;
}
}
/**
* gtk_radio_menu_item_set_group:
* @radio_menu_item: a #GtkRadioMenuItem.
* @group: (element-type GtkRadioMenuItem): the new group.
*
* Sets the group of a radio menu item, or changes it.
*/
void
gtk_radio_menu_item_set_group (GtkRadioMenuItem *radio_menu_item,
GSList *group)
{
GtkRadioMenuItemPrivate *priv;
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));
priv = radio_menu_item->priv;
if (priv->group)
{
GSList *slist;
priv->group = g_slist_remove (priv->group, radio_menu_item);
if (priv->group && !priv->group->next)
old_group_singleton = g_object_ref (priv->group->data);
for (slist = priv->group; slist; slist = slist->next)
{
GtkRadioMenuItem *tmp_item;
tmp_item = slist->data;
tmp_item->priv->group = priv->group;
}
}
if (group && !group->next)
new_group_singleton = g_object_ref (group->data);
priv->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->priv->group = priv->group;
}
}
else
{
_gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (radio_menu_item), 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);
}
/**
* gtk_radio_menu_item_new_with_label:
* @group: (element-type GtkRadioMenuItem) (transfer full):
* @label: the text for the label
*
* Creates a new #GtkRadioMenuItem whose child is a simple #GtkLabel.
*
* Returns: (transfer none): A new #GtkRadioMenuItem
*/
GtkWidget*
gtk_radio_menu_item_new_with_label (GSList *group,
const gchar *label)
{
return g_object_new (GTK_TYPE_RADIO_MENU_ITEM,
"group", (group) ? group->data : NULL,
"label", label,
NULL);
}
/**
* gtk_radio_menu_item_new_with_mnemonic:
* @group: (element-type GtkRadioMenuItem): group the radio menu item is inside
* @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.
*
* Returns: a new #GtkRadioMenuItem
*/
GtkWidget*
gtk_radio_menu_item_new_with_mnemonic (GSList *group,
const gchar *label)
{
return g_object_new (GTK_TYPE_RADIO_MENU_ITEM,
"group", (group) ? group->data : NULL,
"label", label,
"use-underline", TRUE,
NULL);
}
/**
* gtk_radio_menu_item_new_from_widget: (constructor)
* @group: An existing #GtkRadioMenuItem
*
* Creates a new #GtkRadioMenuItem adding it to the same group as @group.
*
* Return value: (transfer none): 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: (constructor)
* @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: (transfer none): 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: (constructor)
* @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: (transfer none): 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);
}
/**
* gtk_radio_menu_item_get_group:
* @radio_menu_item: a #GtkRadioMenuItem
*
* Returns the group to which the radio menu item belongs, as a #GList of
* #GtkRadioMenuItem. The list belongs to GTK+ and should not be freed.
*
* Returns: (element-type GtkRadioMenuItem) (transfer none): the group
* of @radio_menu_item
*/
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->priv->group;
}
static void
gtk_radio_menu_item_class_init (GtkRadioMenuItemClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkMenuItemClass *menu_item_class;
gobject_class = G_OBJECT_CLASS (klass);
widget_class = GTK_WIDGET_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;
widget_class->destroy = gtk_radio_menu_item_destroy;
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RADIO_MENU_ITEM_ACCESSIBLE);
menu_item_class->activate = gtk_radio_menu_item_activate;
/**
* 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));
/**
* 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 button 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 (gobject_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)
{
GtkRadioMenuItemPrivate *priv;
radio_menu_item->priv = gtk_radio_menu_item_get_instance_private (radio_menu_item);
priv = radio_menu_item->priv;
priv->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 (GtkWidget *widget)
{
GtkRadioMenuItem *radio_menu_item = GTK_RADIO_MENU_ITEM (widget);
GtkRadioMenuItemPrivate *priv = radio_menu_item->priv;
GtkWidget *old_group_singleton = NULL;
GtkRadioMenuItem *tmp_menu_item;
GSList *tmp_list;
gboolean was_in_group;
was_in_group = priv->group && priv->group->next;
priv->group = g_slist_remove (priv->group, radio_menu_item);
if (priv->group && !priv->group->next)
old_group_singleton = priv->group->data;
tmp_list = priv->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
tmp_menu_item->priv->group = priv->group;
}
/* this radio menu item is no longer in the group */
priv->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);
GTK_WIDGET_CLASS (gtk_radio_menu_item_parent_class)->destroy (widget);
}
static void
gtk_radio_menu_item_activate (GtkMenuItem *menu_item)
{
GtkRadioMenuItem *radio_menu_item = GTK_RADIO_MENU_ITEM (menu_item);
GtkRadioMenuItemPrivate *priv = radio_menu_item->priv;
GtkCheckMenuItem *check_menu_item = GTK_CHECK_MENU_ITEM (menu_item);
GtkCheckMenuItem *tmp_menu_item;
GtkAction *action;
GSList *tmp_list;
gboolean active;
gint toggled;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
action = gtk_activatable_get_related_action (GTK_ACTIVATABLE (menu_item));
if (action && gtk_menu_item_get_submenu (menu_item) == NULL)
gtk_action_activate (action);
G_GNUC_END_IGNORE_DEPRECATIONS;
toggled = FALSE;
active = gtk_check_menu_item_get_active (check_menu_item);
if (active)
{
tmp_menu_item = NULL;
tmp_list = priv->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
if (gtk_check_menu_item_get_active (tmp_menu_item) &&
tmp_menu_item != check_menu_item)
break;
tmp_menu_item = NULL;
}
if (tmp_menu_item)
{
toggled = TRUE;
_gtk_check_menu_item_set_active (check_menu_item, !active);
}
}
else
{
toggled = TRUE;
_gtk_check_menu_item_set_active (check_menu_item, !active);
tmp_list = priv->group;
while (tmp_list)
{
tmp_menu_item = tmp_list->data;
tmp_list = tmp_list->next;
if (gtk_check_menu_item_get_active (tmp_menu_item) &&
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));
}
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