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gtk2/gtk/gtkcheckmenuitem.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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2001. 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 "gtkcheckmenuitem.h"
#include "gtkmenuitemprivate.h"
#include "gtkaccellabel.h"
#include "gtkactivatable.h"
#include "gtktoggleaction.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "a11y/gtkcheckmenuitemaccessible.h"
/**
* SECTION:gtkcheckmenuitem
* @Short_description: A menu item with a check box
* @Title: GtkCheckMenuItem
*
* A #GtkCheckMenuItem is a menu item that maintains the state of a boolean
* value in addition to a #GtkMenuItem usual role in activating application
* code.
*
* A check box indicating the state of the boolean value is displayed
* at the left side of the #GtkMenuItem. Activating the #GtkMenuItem
* toggles the value.
*/
#define INDICATOR_SIZE 16
struct _GtkCheckMenuItemPrivate
{
guint active : 1;
guint always_show_toggle : 1;
guint draw_as_radio : 1;
guint inconsistent : 1;
};
enum {
TOGGLED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACTIVE,
PROP_INCONSISTENT,
PROP_DRAW_AS_RADIO
};
static gint gtk_check_menu_item_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_check_menu_item_activate (GtkMenuItem *menu_item);
static void gtk_check_menu_item_toggle_size_request (GtkMenuItem *menu_item,
gint *requisition);
static void gtk_real_check_menu_item_draw_indicator (GtkCheckMenuItem *check_menu_item,
cairo_t *cr);
static void gtk_check_menu_item_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_check_menu_item_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_check_menu_item_activatable_interface_init (GtkActivatableIface *iface);
static void gtk_check_menu_item_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name);
static void gtk_check_menu_item_sync_action_properties (GtkActivatable *activatable,
GtkAction *action);
static GtkActivatableIface *parent_activatable_iface;
static guint check_menu_item_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkCheckMenuItem, gtk_check_menu_item, GTK_TYPE_MENU_ITEM,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ACTIVATABLE,
gtk_check_menu_item_activatable_interface_init))
static void
gtk_check_menu_item_class_init (GtkCheckMenuItemClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkMenuItemClass *menu_item_class;
gobject_class = G_OBJECT_CLASS (klass);
widget_class = (GtkWidgetClass*) klass;
menu_item_class = (GtkMenuItemClass*) klass;
gobject_class->set_property = gtk_check_menu_item_set_property;
gobject_class->get_property = gtk_check_menu_item_get_property;
g_object_class_install_property (gobject_class,
PROP_ACTIVE,
g_param_spec_boolean ("active",
P_("Active"),
P_("Whether the menu item is checked"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_INCONSISTENT,
g_param_spec_boolean ("inconsistent",
P_("Inconsistent"),
P_("Whether to display an \"inconsistent\" state"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_DRAW_AS_RADIO,
g_param_spec_boolean ("draw-as-radio",
P_("Draw as radio menu item"),
P_("Whether the menu item looks like a radio menu item"),
FALSE,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("indicator-size",
P_("Indicator Size"),
P_("Size of check or radio indicator"),
0,
G_MAXINT,
INDICATOR_SIZE,
GTK_PARAM_READABLE));
widget_class->draw = gtk_check_menu_item_draw;
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_CHECK_MENU_ITEM_ACCESSIBLE);
menu_item_class->activate = gtk_check_menu_item_activate;
menu_item_class->hide_on_activate = FALSE;
menu_item_class->toggle_size_request = gtk_check_menu_item_toggle_size_request;
klass->toggled = NULL;
klass->draw_indicator = gtk_real_check_menu_item_draw_indicator;
/**
* GtkCheckMenuItem::toggled:
* @checkmenuitem: the object which received the signal.
*
* This signal is emitted when the state of the check box is changed.
*
* A signal handler can use gtk_check_menu_item_get_active()
* to discover the new state.
*/
check_menu_item_signals[TOGGLED] =
g_signal_new (I_("toggled"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCheckMenuItemClass, toggled),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (klass, sizeof (GtkCheckMenuItemPrivate));
}
static void
gtk_check_menu_item_activatable_interface_init (GtkActivatableIface *iface)
{
parent_activatable_iface = g_type_interface_peek_parent (iface);
iface->update = gtk_check_menu_item_update;
iface->sync_action_properties = gtk_check_menu_item_sync_action_properties;
}
static void
gtk_check_menu_item_update (GtkActivatable *activatable,
GtkAction *action,
const gchar *property_name)
{
GtkCheckMenuItem *check_menu_item;
check_menu_item = GTK_CHECK_MENU_ITEM (activatable);
parent_activatable_iface->update (activatable, action, property_name);
if (strcmp (property_name, "active") == 0)
{
gtk_action_block_activate (action);
gtk_check_menu_item_set_active (check_menu_item, gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
}
if (!gtk_activatable_get_use_action_appearance (activatable))
return;
if (strcmp (property_name, "draw-as-radio") == 0)
gtk_check_menu_item_set_draw_as_radio (check_menu_item,
gtk_toggle_action_get_draw_as_radio (GTK_TOGGLE_ACTION (action)));
}
static void
gtk_check_menu_item_sync_action_properties (GtkActivatable *activatable,
GtkAction *action)
{
GtkCheckMenuItem *check_menu_item;
check_menu_item = GTK_CHECK_MENU_ITEM (activatable);
parent_activatable_iface->sync_action_properties (activatable, action);
if (!GTK_IS_TOGGLE_ACTION (action))
return;
gtk_action_block_activate (action);
gtk_check_menu_item_set_active (check_menu_item, gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)));
gtk_action_unblock_activate (action);
if (!gtk_activatable_get_use_action_appearance (activatable))
return;
gtk_check_menu_item_set_draw_as_radio (check_menu_item,
gtk_toggle_action_get_draw_as_radio (GTK_TOGGLE_ACTION (action)));
}
/**
* gtk_check_menu_item_new:
*
* Creates a new #GtkCheckMenuItem.
*
* Returns: a new #GtkCheckMenuItem.
*/
GtkWidget*
gtk_check_menu_item_new (void)
{
return g_object_new (GTK_TYPE_CHECK_MENU_ITEM, NULL);
}
/**
* gtk_check_menu_item_new_with_label:
* @label: the string to use for the label.
*
* Creates a new #GtkCheckMenuItem with a label.
*
* Returns: a new #GtkCheckMenuItem.
*/
GtkWidget*
gtk_check_menu_item_new_with_label (const gchar *label)
{
return g_object_new (GTK_TYPE_CHECK_MENU_ITEM,
"label", label,
NULL);
}
/**
* gtk_check_menu_item_new_with_mnemonic:
* @label: The text of the button, with an underscore in front of the
* character
*
* Creates a new #GtkCheckMenuItem 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 #GtkCheckMenuItem
*/
GtkWidget*
gtk_check_menu_item_new_with_mnemonic (const gchar *label)
{
return g_object_new (GTK_TYPE_CHECK_MENU_ITEM,
"label", label,
"use-underline", TRUE,
NULL);
}
/**
* gtk_check_menu_item_set_active:
* @check_menu_item: a #GtkCheckMenuItem.
* @is_active: boolean value indicating whether the check box is active.
*
* Sets the active state of the menu item's check box.
*/
void
gtk_check_menu_item_set_active (GtkCheckMenuItem *check_menu_item,
gboolean is_active)
{
GtkCheckMenuItemPrivate *priv;
g_return_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item));
priv = check_menu_item->priv;
is_active = is_active != 0;
if (priv->active != is_active)
gtk_menu_item_activate (GTK_MENU_ITEM (check_menu_item));
}
/**
* gtk_check_menu_item_get_active:
* @check_menu_item: a #GtkCheckMenuItem
*
* Returns whether the check menu item is active. See
* gtk_check_menu_item_set_active ().
*
* Return value: %TRUE if the menu item is checked.
*/
gboolean
gtk_check_menu_item_get_active (GtkCheckMenuItem *check_menu_item)
{
g_return_val_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item), FALSE);
return check_menu_item->priv->active;
}
static void
gtk_check_menu_item_toggle_size_request (GtkMenuItem *menu_item,
gint *requisition)
{
guint toggle_spacing;
guint indicator_size;
g_return_if_fail (GTK_IS_CHECK_MENU_ITEM (menu_item));
gtk_widget_style_get (GTK_WIDGET (menu_item),
"toggle-spacing", &toggle_spacing,
"indicator-size", &indicator_size,
NULL);
*requisition = indicator_size + toggle_spacing;
}
/**
* gtk_check_menu_item_toggled:
* @check_menu_item: a #GtkCheckMenuItem.
*
* Emits the #GtkCheckMenuItem::toggled signal.
*/
void
gtk_check_menu_item_toggled (GtkCheckMenuItem *check_menu_item)
{
g_signal_emit (check_menu_item, check_menu_item_signals[TOGGLED], 0);
}
/**
* gtk_check_menu_item_set_inconsistent:
* @check_menu_item: a #GtkCheckMenuItem
* @setting: %TRUE to display an "inconsistent" third state check
*
* If the user has selected a range of elements (such as some text or
* spreadsheet cells) that are affected by a boolean setting, and the
* current values in that range are inconsistent, you may want to
* display the check in an "in between" state. This function turns on
* "in between" display. Normally you would turn off the inconsistent
* state again if the user explicitly selects a setting. This has to be
* done manually, gtk_check_menu_item_set_inconsistent() only affects
* visual appearance, it doesn't affect the semantics of the widget.
*
**/
void
gtk_check_menu_item_set_inconsistent (GtkCheckMenuItem *check_menu_item,
gboolean setting)
{
GtkCheckMenuItemPrivate *priv;
g_return_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item));
priv = check_menu_item->priv;
setting = setting != FALSE;
if (setting != priv->inconsistent)
{
priv->inconsistent = setting;
gtk_widget_queue_draw (GTK_WIDGET (check_menu_item));
g_object_notify (G_OBJECT (check_menu_item), "inconsistent");
}
}
/**
* gtk_check_menu_item_get_inconsistent:
* @check_menu_item: a #GtkCheckMenuItem
*
* Retrieves the value set by gtk_check_menu_item_set_inconsistent().
*
* Return value: %TRUE if inconsistent
**/
gboolean
gtk_check_menu_item_get_inconsistent (GtkCheckMenuItem *check_menu_item)
{
g_return_val_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item), FALSE);
return check_menu_item->priv->inconsistent;
}
/**
* gtk_check_menu_item_set_draw_as_radio:
* @check_menu_item: a #GtkCheckMenuItem
* @draw_as_radio: whether @check_menu_item is drawn like a #GtkRadioMenuItem
*
* Sets whether @check_menu_item is drawn like a #GtkRadioMenuItem
*
* Since: 2.4
**/
void
gtk_check_menu_item_set_draw_as_radio (GtkCheckMenuItem *check_menu_item,
gboolean draw_as_radio)
{
GtkCheckMenuItemPrivate *priv;
g_return_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item));
priv = check_menu_item->priv;
draw_as_radio = draw_as_radio != FALSE;
if (draw_as_radio != priv->draw_as_radio)
{
priv->draw_as_radio = draw_as_radio;
gtk_widget_queue_draw (GTK_WIDGET (check_menu_item));
g_object_notify (G_OBJECT (check_menu_item), "draw-as-radio");
}
}
/**
* gtk_check_menu_item_get_draw_as_radio:
* @check_menu_item: a #GtkCheckMenuItem
*
* Returns whether @check_menu_item looks like a #GtkRadioMenuItem
*
* Return value: Whether @check_menu_item looks like a #GtkRadioMenuItem
*
* Since: 2.4
**/
gboolean
gtk_check_menu_item_get_draw_as_radio (GtkCheckMenuItem *check_menu_item)
{
g_return_val_if_fail (GTK_IS_CHECK_MENU_ITEM (check_menu_item), FALSE);
return check_menu_item->priv->draw_as_radio;
}
static void
gtk_check_menu_item_init (GtkCheckMenuItem *check_menu_item)
{
GtkCheckMenuItemPrivate *priv;
check_menu_item->priv = G_TYPE_INSTANCE_GET_PRIVATE (check_menu_item,
GTK_TYPE_CHECK_MENU_ITEM,
GtkCheckMenuItemPrivate);
priv = check_menu_item->priv;
priv->active = FALSE;
priv->always_show_toggle = TRUE;
}
static gint
gtk_check_menu_item_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkCheckMenuItem *check_menu_item = GTK_CHECK_MENU_ITEM (widget);
if (GTK_WIDGET_CLASS (gtk_check_menu_item_parent_class)->draw)
GTK_WIDGET_CLASS (gtk_check_menu_item_parent_class)->draw (widget, cr);
if (GTK_CHECK_MENU_ITEM_GET_CLASS (check_menu_item)->draw_indicator)
GTK_CHECK_MENU_ITEM_GET_CLASS (check_menu_item)->draw_indicator (check_menu_item, cr);
return FALSE;
}
static void
gtk_check_menu_item_activate (GtkMenuItem *menu_item)
{
GtkCheckMenuItemPrivate *priv;
GtkCheckMenuItem *check_menu_item = GTK_CHECK_MENU_ITEM (menu_item);
priv = check_menu_item->priv;
priv->active = !priv->active;
gtk_check_menu_item_toggled (check_menu_item);
gtk_widget_queue_draw (GTK_WIDGET (check_menu_item));
GTK_MENU_ITEM_CLASS (gtk_check_menu_item_parent_class)->activate (menu_item);
g_object_notify (G_OBJECT (check_menu_item), "active");
}
static void
gtk_real_check_menu_item_draw_indicator (GtkCheckMenuItem *check_menu_item,
cairo_t *cr)
{
GtkCheckMenuItemPrivate *priv = check_menu_item->priv;
GtkWidget *widget;
gint x, y;
widget = GTK_WIDGET (check_menu_item);
if (gtk_widget_is_drawable (widget))
{
GtkAllocation allocation;
GtkStyleContext *context;
guint border_width;
guint offset;
guint toggle_size;
guint toggle_spacing;
guint horizontal_padding;
guint indicator_size;
GtkStateFlags state;
GtkBorder padding;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_style_get (widget,
"toggle-spacing", &toggle_spacing,
"horizontal-padding", &horizontal_padding,
"indicator-size", &indicator_size,
NULL);
toggle_size = GTK_MENU_ITEM (check_menu_item)->priv->toggle_size;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
offset = border_width + padding.left + 2;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
{
x = offset + horizontal_padding +
(toggle_size - toggle_spacing - indicator_size) / 2;
}
else
{
x = allocation.width -
offset - horizontal_padding - toggle_size + toggle_spacing +
(toggle_size - toggle_spacing - indicator_size) / 2;
}
y = (allocation.height - indicator_size) / 2;
if (priv->active ||
priv->always_show_toggle ||
(state & GTK_STATE_FLAG_PRELIGHT))
{
gtk_style_context_save (context);
if (priv->inconsistent)
state |= GTK_STATE_FLAG_INCONSISTENT;
else if (priv->active)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_set_state (context, state);
if (priv->draw_as_radio)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RADIO);
gtk_render_option (context, cr, x, y,
indicator_size, indicator_size);
}
else
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_CHECK);
gtk_render_check (context, cr, x, y,
indicator_size, indicator_size);
}
gtk_style_context_restore (context);
}
}
}
static void
gtk_check_menu_item_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCheckMenuItem *checkitem = GTK_CHECK_MENU_ITEM (object);
GtkCheckMenuItemPrivate *priv = checkitem->priv;
switch (prop_id)
{
case PROP_ACTIVE:
g_value_set_boolean (value, priv->active);
break;
case PROP_INCONSISTENT:
g_value_set_boolean (value, priv->inconsistent);
break;
case PROP_DRAW_AS_RADIO:
g_value_set_boolean (value, priv->draw_as_radio);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_check_menu_item_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCheckMenuItem *checkitem = GTK_CHECK_MENU_ITEM (object);
switch (prop_id)
{
case PROP_ACTIVE:
gtk_check_menu_item_set_active (checkitem, g_value_get_boolean (value));
break;
case PROP_INCONSISTENT:
gtk_check_menu_item_set_inconsistent (checkitem, g_value_get_boolean (value));
break;
case PROP_DRAW_AS_RADIO:
gtk_check_menu_item_set_draw_as_radio (checkitem, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* Private */
/*
* _gtk_check_menu_item_set_active:
* @check_menu_item: a #GtkCheckMenuItem
* @is_active: whether the action is active or not
*
* Sets the #GtkCheckMenuItem:active property directly. This function does
* not emit signals or notifications: it is left to the caller to do so.
*/
void
_gtk_check_menu_item_set_active (GtkCheckMenuItem *check_menu_item,
gboolean is_active)
{
GtkCheckMenuItemPrivate *priv = check_menu_item->priv;
priv->active = is_active;
}
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