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gtk2/gtk/gtkmenubar.c
Matthias Clasen b523f2b46a menubar: Make final
2019-05-28 19:43:43 -04:00

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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 "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
typedef struct _GtkMenuBarPrivate GtkMenuBarPrivate;
typedef struct _GtkMenuBarClass GtkMenuBarClass;
struct _GtkMenuBar
{
GtkMenuShell menu_shell;
};
struct _GtkMenuBarClass
{
GtkMenuShellClass parent_class;
};
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,
int width,
int height,
int baseline);
static void gtk_menu_bar_root (GtkWidget *widget);
static void gtk_menu_bar_unroot (GtkWidget *widget);
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 (GtkMenuBar, gtk_menu_bar, GTK_TYPE_MENU_SHELL)
static void
gtk_menu_bar_class_init (GtkMenuBarClass *class)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkMenuShellClass *menu_shell_class = GTK_MENU_SHELL_CLASS (class);
GtkBindingSet *binding_set;
widget_class->measure = gtk_menu_bar_measure;
widget_class->size_allocate = gtk_menu_bar_size_allocate;
widget_class->root = gtk_menu_bar_root;
widget_class->unroot = gtk_menu_bar_unroot;
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);
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_MENU_BAR);
gtk_widget_class_set_css_name (widget_class, I_("menubar"));
}
static void
gtk_menu_bar_init (GtkMenuBar *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_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkMenuShell *menu_shell;
GtkWidget *child;
GList *children;
gboolean use_toggle_size, use_maximize;
gint child_minimum, child_natural;
*minimum = 0;
*natural = 0;
menu_shell = GTK_MENU_SHELL (widget);
children = menu_shell->priv->children;
use_toggle_size = (orientation == GTK_ORIENTATION_HORIZONTAL);
use_maximize = (orientation == GTK_ORIENTATION_VERTICAL);
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,
int width,
int height,
int baseline)
{
GtkMenuShell *menu_shell;
GtkWidget *child;
GList *children;
GtkAllocation remaining_space;
GArray *requested_sizes;
gint toggle_size;
guint i;
int size;
gboolean ltr = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR);
menu_shell = GTK_MENU_SHELL (widget);
if (!menu_shell->priv->children)
return;
remaining_space = (GtkAllocation) {0, 0, width, height};
requested_sizes = g_array_new (FALSE, FALSE, sizeof (GtkRequestedSize));
size = remaining_space.width;
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);
}
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_root (GtkWidget *widget)
{
GtkMenuBar *menubar = GTK_MENU_BAR (widget);
GtkWidget *toplevel;
GTK_WIDGET_CLASS (gtk_menu_bar_parent_class)->root (widget);
toplevel = GTK_WIDGET (gtk_widget_get_root (widget));
add_to_window (GTK_WINDOW (toplevel), menubar);
}
static void
gtk_menu_bar_unroot (GtkWidget *widget)
{
GtkMenuBar *menubar = GTK_MENU_BAR (widget);
GtkWidget *toplevel;
toplevel = GTK_WIDGET (gtk_widget_get_root (widget));
remove_from_window (GTK_WINDOW (toplevel), menubar);
GTK_WIDGET_CLASS (gtk_menu_bar_parent_class)->unroot (widget);
}
/**
* _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 (gtk_widget_get_root (GTK_WIDGET (menubar)));
GtkMenuItem *to_activate = NULL;
if (GTK_IS_WINDOW (toplevel))
{
GList *tmp_menubars = _gtk_menu_bar_get_viewable_menu_bars (GTK_WINDOW (toplevel));
GList *l;
GPtrArray *menubars;
gboolean found;
guint index;
menubars = g_ptr_array_sized_new (g_list_length (tmp_menubars));
for (l = tmp_menubars; l; l = l->next)
g_ptr_array_add (menubars, l->data);
gtk_widget_focus_sort (toplevel, dir, menubars);
found = g_ptr_array_find (menubars, menubar, &index);
if (found && index < menubars->len - 1)
{
GtkWidget *next = g_ptr_array_index (menubars, index + 1);
GtkMenuShell *new_menushell = GTK_MENU_SHELL (next);
if (new_menushell->priv->children)
to_activate = new_menushell->priv->children->data;
}
g_ptr_array_free (menubars, TRUE);
}
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);
if (gtk_widget_get_direction (GTK_WIDGET (menubar)) == GTK_TEXT_DIR_RTL)
{
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;
}
}
GTK_MENU_SHELL_CLASS (gtk_menu_bar_parent_class)->move_current (menu_shell, 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
*/
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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