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gtk2/gtk/gtkmenubar.c
Benjamin Otte 43c212ac28 build: Enable -Wswitch-enum and -Wswitch-default 
This patch makes that work using 1 of 2 options:

1. Add all missing enums to the switch statement
  or
2. Cast the switch argument to a uint to avoid having to do that (mostly
   for GdkEventType).

I even found a bug while doing that: clearing a GtkImage with a surface
did not notify thae surface property.

The reason for enabling this flag even though it is tedious at times is
that it is very useful when adding values to an enum, because it makes
GTK immediately warn about all the switch statements where this enum is
relevant.
And I expect changes to enums to be frequent during the GTK4 development
cycle.
2017-10-06 21:23:39 +02:00

811 lines
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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/.
*/
/**
* SECTION:gtkmenubar
* @Title: GtkMenuBar
* @Short_description: A subclass of GtkMenuShell which holds GtkMenuItem widgets
* @See_also: #GtkMenuShell, #GtkMenu, #GtkMenuItem
*
* The #GtkMenuBar is a subclass of #GtkMenuShell which contains one or
* more #GtkMenuItems. The result is a standard menu bar which can hold
* many menu items.
*
* # CSS nodes
*
* GtkMenuBar has a single CSS node with name menubar.
*/
#include "config.h"
#include "gtkmenubar.h"
#include "gtkbindings.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmenuitemprivate.h"
#include "gtkmenuprivate.h"
#include "gtkmenushellprivate.h"
#include "gtkrender.h"
#include "gtksettings.h"
#include "gtksizerequest.h"
#include "gtkwindow.h"
#include "gtkcontainerprivate.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#define MENU_BAR_POPUP_DELAY 0
/* Properties */
enum {
PROP_0,
PROP_PACK_DIRECTION,
PROP_CHILD_PACK_DIRECTION
};
struct _GtkMenuBarPrivate
{
GtkPackDirection pack_direction;
GtkPackDirection child_pack_direction;
};
static void gtk_menu_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_menu_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_menu_bar_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_menu_bar_size_allocate (GtkWidget *widget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip);
static void gtk_menu_bar_hierarchy_changed (GtkWidget *widget,
GtkWidget *old_toplevel);
static gint gtk_menu_bar_get_popup_delay (GtkMenuShell *menu_shell);
static void gtk_menu_bar_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction);
G_DEFINE_TYPE_WITH_PRIVATE (GtkMenuBar, gtk_menu_bar, GTK_TYPE_MENU_SHELL)
static void
gtk_menu_bar_class_init (GtkMenuBarClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkMenuShellClass *menu_shell_class;
GtkBindingSet *binding_set;
gobject_class = (GObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
menu_shell_class = (GtkMenuShellClass*) class;
gobject_class->get_property = gtk_menu_bar_get_property;
gobject_class->set_property = gtk_menu_bar_set_property;
widget_class->measure = gtk_menu_bar_measure;
widget_class->size_allocate = gtk_menu_bar_size_allocate;
widget_class->hierarchy_changed = gtk_menu_bar_hierarchy_changed;
menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
menu_shell_class->get_popup_delay = gtk_menu_bar_get_popup_delay;
menu_shell_class->move_current = gtk_menu_bar_move_current;
binding_set = gtk_binding_set_by_class (class);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Up, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Up, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
/**
* GtkMenuBar:pack-direction:
*
* The pack direction of the menubar. It determines how
* menuitems are arranged in the menubar.
*
* Since: 2.8
*/
g_object_class_install_property (gobject_class,
PROP_PACK_DIRECTION,
g_param_spec_enum ("pack-direction",
P_("Pack direction"),
P_("The pack direction of the menubar"),
GTK_TYPE_PACK_DIRECTION,
GTK_PACK_DIRECTION_LTR,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenuBar:child-pack-direction:
*
* The child pack direction of the menubar. It determines how
* the widgets contained in child menuitems are arranged.
*
* Since: 2.8
*/
g_object_class_install_property (gobject_class,
PROP_CHILD_PACK_DIRECTION,
g_param_spec_enum ("child-pack-direction",
P_("Child Pack direction"),
P_("The child pack direction of the menubar"),
GTK_TYPE_PACK_DIRECTION,
GTK_PACK_DIRECTION_LTR,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_MENU_BAR);
gtk_widget_class_set_css_name (widget_class, "menubar");
}
static void
gtk_menu_bar_init (GtkMenuBar *menu_bar)
{
menu_bar->priv = gtk_menu_bar_get_instance_private (menu_bar);
}
/**
* gtk_menu_bar_new:
*
* Creates a new #GtkMenuBar
*
* Returns: the new menu bar, as a #GtkWidget
*/
GtkWidget*
gtk_menu_bar_new (void)
{
return g_object_new (GTK_TYPE_MENU_BAR, NULL);
}
static void
gtk_menu_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenuBar *menubar = GTK_MENU_BAR (object);
switch (prop_id)
{
case PROP_PACK_DIRECTION:
gtk_menu_bar_set_pack_direction (menubar, g_value_get_enum (value));
break;
case PROP_CHILD_PACK_DIRECTION:
gtk_menu_bar_set_child_pack_direction (menubar, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkMenuBar *menubar = GTK_MENU_BAR (object);
switch (prop_id)
{
case PROP_PACK_DIRECTION:
g_value_set_enum (value, gtk_menu_bar_get_pack_direction (menubar));
break;
case PROP_CHILD_PACK_DIRECTION:
g_value_set_enum (value, gtk_menu_bar_get_child_pack_direction (menubar));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_bar_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkMenuBar *menu_bar;
GtkMenuBarPrivate *priv;
GtkMenuShell *menu_shell;
GtkWidget *child;
GList *children;
gboolean use_toggle_size, use_maximize;
gint child_minimum, child_natural;
*minimum = 0;
*natural = 0;
menu_bar = GTK_MENU_BAR (widget);
menu_shell = GTK_MENU_SHELL (widget);
priv = menu_bar->priv;
children = menu_shell->priv->children;
if (priv->child_pack_direction == GTK_PACK_DIRECTION_LTR ||
priv->child_pack_direction == GTK_PACK_DIRECTION_RTL)
use_toggle_size = (orientation == GTK_ORIENTATION_HORIZONTAL);
else
use_toggle_size = (orientation == GTK_ORIENTATION_VERTICAL);
if (priv->pack_direction == GTK_PACK_DIRECTION_LTR ||
priv->pack_direction == GTK_PACK_DIRECTION_RTL)
use_maximize = (orientation == GTK_ORIENTATION_VERTICAL);
else
use_maximize = (orientation == GTK_ORIENTATION_HORIZONTAL);
while (children)
{
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
gtk_widget_measure (child,
orientation,
for_size,
&child_minimum, &child_natural,
NULL, NULL);
if (use_toggle_size)
{
gint toggle_size;
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
&toggle_size);
child_minimum += toggle_size;
child_natural += toggle_size;
}
if (use_maximize)
{
*minimum = MAX (*minimum, child_minimum);
*natural = MAX (*natural, child_natural);
}
else
{
*minimum += child_minimum;
*natural += child_natural;
}
}
}
}
static void
gtk_menu_bar_size_allocate (GtkWidget *widget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip)
{
GtkMenuBar *menu_bar = GTK_MENU_BAR (widget);
GtkMenuBarPrivate *priv = menu_bar->priv;
GtkMenuShell *menu_shell;
GtkWidget *child;
GList *children;
GtkAllocation remaining_space;
GArray *requested_sizes;
gint toggle_size;
guint i;
menu_shell = GTK_MENU_SHELL (widget);
if (!menu_shell->priv->children)
return;
remaining_space = *allocation;
requested_sizes = g_array_new (FALSE, FALSE, sizeof (GtkRequestedSize));
if (priv->pack_direction == GTK_PACK_DIRECTION_LTR ||
priv->pack_direction == GTK_PACK_DIRECTION_RTL)
{
int size = remaining_space.width;
gboolean ltr = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR) == (priv->pack_direction == GTK_PACK_DIRECTION_LTR);
for (children = menu_shell->priv->children; children; children = children->next)
{
GtkRequestedSize request;
child = children->data;
if (!gtk_widget_get_visible (child))
continue;
request.data = child;
gtk_widget_measure (child, GTK_ORIENTATION_HORIZONTAL,
remaining_space.height,
&request.minimum_size, &request.natural_size,
NULL, NULL);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
&toggle_size);
request.minimum_size += toggle_size;
request.natural_size += toggle_size;
gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child), toggle_size);
g_array_append_val (requested_sizes, request);
size -= request.minimum_size;
}
size = gtk_distribute_natural_allocation (size,
requested_sizes->len,
(GtkRequestedSize *) requested_sizes->data);
for (i = 0; i < requested_sizes->len; i++)
{
GtkAllocation child_allocation = remaining_space;
GtkRequestedSize *request = &g_array_index (requested_sizes, GtkRequestedSize, i);
child_allocation.width = request->minimum_size;
remaining_space.width -= request->minimum_size;
if (i + 1 == requested_sizes->len && GTK_IS_MENU_ITEM (request->data) &&
GTK_MENU_ITEM (request->data)->priv->right_justify)
ltr = !ltr;
if (ltr)
remaining_space.x += request->minimum_size;
else
child_allocation.x += remaining_space.width;
gtk_widget_size_allocate (request->data, &child_allocation, -1, out_clip);
}
}
else
{
int size = remaining_space.height;
gboolean ttb = (priv->pack_direction == GTK_PACK_DIRECTION_TTB);
for (children = menu_shell->priv->children; children; children = children->next)
{
GtkRequestedSize request;
child = children->data;
if (!gtk_widget_get_visible (child))
continue;
request.data = child;
gtk_widget_measure (child, GTK_ORIENTATION_VERTICAL,
remaining_space.width,
&request.minimum_size, &request.natural_size,
NULL, NULL);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
&toggle_size);
request.minimum_size += toggle_size;
request.natural_size += toggle_size;
gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child), toggle_size);
g_array_append_val (requested_sizes, request);
size -= request.minimum_size;
}
size = gtk_distribute_natural_allocation (size,
requested_sizes->len,
(GtkRequestedSize *) requested_sizes->data);
for (i = 0; i < requested_sizes->len; i++)
{
GtkAllocation child_allocation = remaining_space;
GtkRequestedSize *request = &g_array_index (requested_sizes, GtkRequestedSize, i);
child_allocation.height = request->minimum_size;
remaining_space.height -= request->minimum_size;
if (i + 1 == requested_sizes->len && GTK_IS_MENU_ITEM (request->data) &&
GTK_MENU_ITEM (request->data)->priv->right_justify)
ttb = !ttb;
if (ttb)
remaining_space.y += request->minimum_size;
else
child_allocation.y += remaining_space.height;
gtk_widget_size_allocate (request->data, &child_allocation, -1, out_clip);
}
}
g_array_free (requested_sizes, TRUE);
}
static GList *
get_menu_bars (GtkWindow *window)
{
return g_object_get_data (G_OBJECT (window), "gtk-menu-bar-list");
}
GList *
_gtk_menu_bar_get_viewable_menu_bars (GtkWindow *window)
{
GList *menu_bars;
GList *viewable_menu_bars = NULL;
for (menu_bars = get_menu_bars (window);
menu_bars;
menu_bars = menu_bars->next)
{
GtkWidget *widget = menu_bars->data;
gboolean viewable = TRUE;
while (widget)
{
if (!gtk_widget_get_mapped (widget))
viewable = FALSE;
widget = gtk_widget_get_parent (widget);
}
if (viewable)
viewable_menu_bars = g_list_prepend (viewable_menu_bars, menu_bars->data);
}
return g_list_reverse (viewable_menu_bars);
}
static void
set_menu_bars (GtkWindow *window,
GList *menubars)
{
g_object_set_data (G_OBJECT (window), I_("gtk-menu-bar-list"), menubars);
}
static void
add_to_window (GtkWindow *window,
GtkMenuBar *menubar)
{
GList *menubars = get_menu_bars (window);
set_menu_bars (window, g_list_prepend (menubars, menubar));
}
static void
remove_from_window (GtkWindow *window,
GtkMenuBar *menubar)
{
GList *menubars = get_menu_bars (window);
menubars = g_list_remove (menubars, menubar);
set_menu_bars (window, menubars);
}
static void
gtk_menu_bar_hierarchy_changed (GtkWidget *widget,
GtkWidget *old_toplevel)
{
GtkWidget *toplevel;
GtkMenuBar *menubar;
menubar = GTK_MENU_BAR (widget);
toplevel = gtk_widget_get_toplevel (widget);
if (old_toplevel)
remove_from_window (GTK_WINDOW (old_toplevel), menubar);
if (gtk_widget_is_toplevel (toplevel))
add_to_window (GTK_WINDOW (toplevel), menubar);
}
/**
* _gtk_menu_bar_cycle_focus:
* @menubar: a #GtkMenuBar
* @dir: direction in which to cycle the focus
*
* Move the focus between menubars in the toplevel.
**/
void
_gtk_menu_bar_cycle_focus (GtkMenuBar *menubar,
GtkDirectionType dir)
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (menubar));
GtkMenuItem *to_activate = NULL;
if (gtk_widget_is_toplevel (toplevel))
{
GList *tmp_menubars = _gtk_menu_bar_get_viewable_menu_bars (GTK_WINDOW (toplevel));
GList *menubars;
GList *current;
menubars = _gtk_container_focus_sort (GTK_CONTAINER (toplevel), tmp_menubars,
dir, GTK_WIDGET (menubar));
g_list_free (tmp_menubars);
if (menubars)
{
current = g_list_find (menubars, menubar);
if (current && current->next)
{
GtkMenuShell *new_menushell = GTK_MENU_SHELL (current->next->data);
if (new_menushell->priv->children)
to_activate = new_menushell->priv->children->data;
}
}
g_list_free (menubars);
}
gtk_menu_shell_cancel (GTK_MENU_SHELL (menubar));
if (to_activate)
g_signal_emit_by_name (to_activate, "activate_item");
}
static gint
gtk_menu_bar_get_popup_delay (GtkMenuShell *menu_shell)
{
return MENU_BAR_POPUP_DELAY;
}
static void
gtk_menu_bar_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction)
{
GtkMenuBar *menubar = GTK_MENU_BAR (menu_shell);
GtkTextDirection text_dir;
GtkPackDirection pack_dir;
text_dir = gtk_widget_get_direction (GTK_WIDGET (menubar));
pack_dir = gtk_menu_bar_get_pack_direction (menubar);
if (pack_dir == GTK_PACK_DIRECTION_LTR || pack_dir == GTK_PACK_DIRECTION_RTL)
{
if ((text_dir == GTK_TEXT_DIR_RTL) == (pack_dir == GTK_PACK_DIRECTION_LTR))
{
switch (direction)
{
case GTK_MENU_DIR_PREV:
direction = GTK_MENU_DIR_NEXT;
break;
case GTK_MENU_DIR_NEXT:
direction = GTK_MENU_DIR_PREV;
break;
case GTK_MENU_DIR_PARENT:
case GTK_MENU_DIR_CHILD:
default:
break;
}
}
}
else
{
switch (direction)
{
case GTK_MENU_DIR_PARENT:
if ((text_dir == GTK_TEXT_DIR_LTR) == (pack_dir == GTK_PACK_DIRECTION_TTB))
direction = GTK_MENU_DIR_PREV;
else
direction = GTK_MENU_DIR_NEXT;
break;
case GTK_MENU_DIR_CHILD:
if ((text_dir == GTK_TEXT_DIR_LTR) == (pack_dir == GTK_PACK_DIRECTION_TTB))
direction = GTK_MENU_DIR_NEXT;
else
direction = GTK_MENU_DIR_PREV;
break;
case GTK_MENU_DIR_PREV:
if (text_dir == GTK_TEXT_DIR_RTL)
direction = GTK_MENU_DIR_CHILD;
else
direction = GTK_MENU_DIR_PARENT;
break;
case GTK_MENU_DIR_NEXT:
if (text_dir == GTK_TEXT_DIR_RTL)
direction = GTK_MENU_DIR_PARENT;
else
direction = GTK_MENU_DIR_CHILD;
break;
default: ;
}
}
GTK_MENU_SHELL_CLASS (gtk_menu_bar_parent_class)->move_current (menu_shell, direction);
}
/**
* gtk_menu_bar_get_pack_direction:
* @menubar: a #GtkMenuBar
*
* Retrieves the current pack direction of the menubar.
* See gtk_menu_bar_set_pack_direction().
*
* Returns: the pack direction
*
* Since: 2.8
*/
GtkPackDirection
gtk_menu_bar_get_pack_direction (GtkMenuBar *menubar)
{
g_return_val_if_fail (GTK_IS_MENU_BAR (menubar),
GTK_PACK_DIRECTION_LTR);
return menubar->priv->pack_direction;
}
/**
* gtk_menu_bar_set_pack_direction:
* @menubar: a #GtkMenuBar
* @pack_dir: a new #GtkPackDirection
*
* Sets how items should be packed inside a menubar.
*
* Since: 2.8
*/
void
gtk_menu_bar_set_pack_direction (GtkMenuBar *menubar,
GtkPackDirection pack_dir)
{
GtkMenuBarPrivate *priv;
GList *l;
g_return_if_fail (GTK_IS_MENU_BAR (menubar));
priv = menubar->priv;
if (priv->pack_direction != pack_dir)
{
priv->pack_direction = pack_dir;
gtk_widget_queue_resize (GTK_WIDGET (menubar));
for (l = GTK_MENU_SHELL (menubar)->priv->children; l; l = l->next)
gtk_widget_queue_resize (GTK_WIDGET (l->data));
g_object_notify (G_OBJECT (menubar), "pack-direction");
}
}
/**
* gtk_menu_bar_get_child_pack_direction:
* @menubar: a #GtkMenuBar
*
* Retrieves the current child pack direction of the menubar.
* See gtk_menu_bar_set_child_pack_direction().
*
* Returns: the child pack direction
*
* Since: 2.8
*/
GtkPackDirection
gtk_menu_bar_get_child_pack_direction (GtkMenuBar *menubar)
{
g_return_val_if_fail (GTK_IS_MENU_BAR (menubar),
GTK_PACK_DIRECTION_LTR);
return menubar->priv->child_pack_direction;
}
/**
* gtk_menu_bar_set_child_pack_direction:
* @menubar: a #GtkMenuBar
* @child_pack_dir: a new #GtkPackDirection
*
* Sets how widgets should be packed inside the children of a menubar.
*
* Since: 2.8
*/
void
gtk_menu_bar_set_child_pack_direction (GtkMenuBar *menubar,
GtkPackDirection child_pack_dir)
{
GtkMenuBarPrivate *priv;
GList *l;
g_return_if_fail (GTK_IS_MENU_BAR (menubar));
priv = menubar->priv;
if (priv->child_pack_direction != child_pack_dir)
{
priv->child_pack_direction = child_pack_dir;
gtk_widget_queue_resize (GTK_WIDGET (menubar));
for (l = GTK_MENU_SHELL (menubar)->priv->children; l; l = l->next)
gtk_widget_queue_resize (GTK_WIDGET (l->data));
g_object_notify (G_OBJECT (menubar), "child-pack-direction");
}
}
/**
* gtk_menu_bar_new_from_model:
* @model: a #GMenuModel
*
* Creates a new #GtkMenuBar and populates it with menu items
* and submenus according to @model.
*
* The created menu items are connected to actions found in the
* #GtkApplicationWindow to which the menu bar belongs - typically
* by means of being contained within the #GtkApplicationWindows
* widget hierarchy.
*
* Returns: a new #GtkMenuBar
*
* Since: 3.4
*/
GtkWidget *
gtk_menu_bar_new_from_model (GMenuModel *model)
{
GtkWidget *menubar;
g_return_val_if_fail (G_IS_MENU_MODEL (model), NULL);
menubar = gtk_menu_bar_new ();
gtk_menu_shell_bind_model (GTK_MENU_SHELL (menubar), model, NULL, FALSE);
return menubar;
}
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