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gtk2/gtk/gtkmenu.c
Timm Bäder bc4c32505a menu: Popup at window coordinates if widget is given 
Since widget allocations are now relative to the parent's origin, we
need to pass the window allocation here.
2017-07-19 21:27:14 -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:gtkmenu
* @Short_description: A menu widget
* @Title: GtkMenu
*
* A #GtkMenu is a #GtkMenuShell that implements a drop down menu
* consisting of a list of #GtkMenuItem objects which can be navigated
* and activated by the user to perform application functions.
*
* A #GtkMenu is most commonly dropped down by activating a
* #GtkMenuItem in a #GtkMenuBar or popped up by activating a
* #GtkMenuItem in another #GtkMenu.
*
* A #GtkMenu can also be popped up by activating a #GtkComboBox.
* Other composite widgets such as the #GtkNotebook can pop up a
* #GtkMenu as well.
*
* Applications can display a #GtkMenu as a popup menu by calling the
* gtk_menu_popup() function. The example below shows how an application
* can pop up a menu when the 3rd mouse button is pressed.
*
* ## Connecting the popup signal handler.
*
* |[<!-- language="C" -->
* // connect our handler which will popup the menu
* g_signal_connect_swapped (window, "button_press_event",
* G_CALLBACK (my_popup_handler), menu);
* ]|
*
* ## Signal handler which displays a popup menu.
*
* |[<!-- language="C" -->
* static gint
* my_popup_handler (GtkWidget *widget, GdkEvent *event)
* {
* GtkMenu *menu;
* GdkEventButton *event_button;
*
* g_return_val_if_fail (widget != NULL, FALSE);
* g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
* g_return_val_if_fail (event != NULL, FALSE);
*
* // The "widget" is the menu that was supplied when
* // g_signal_connect_swapped() was called.
* menu = GTK_MENU (widget);
*
* if (event->type == GDK_BUTTON_PRESS)
* {
* event_button = (GdkEventButton *) event;
* if (event_button->button == GDK_BUTTON_SECONDARY)
* {
* gtk_menu_popup (menu, NULL, NULL, NULL, NULL,
* event_button->button, event_button->time);
* return TRUE;
* }
* }
*
* return FALSE;
* }
* ]|
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* menu
* ├── arrow.top
* ├── <child>
* ┊
* ├── <child>
* ╰── arrow.bottom
* ]|
*
* The main CSS node of GtkMenu has name menu, and there are two subnodes
* with name arrow, for scrolling menu arrows. These subnodes get the
* .top and .bottom style classes.
*/
#include "config.h"
#include <string.h>
#include <gobject/gvaluecollector.h>
#include "gtkaccellabel.h"
#include "gtkaccelmap.h"
#include "gtkadjustment.h"
#include "gtkbindings.h"
#include "gtkcheckmenuitem.h"
#include "gtkcheckmenuitemprivate.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmenuprivate.h"
#include "gtkmenuitemprivate.h"
#include "gtkmenushellprivate.h"
#include "gtkwindow.h"
#include "gtkbox.h"
#include "gtkscrollbar.h"
#include "gtksettings.h"
#include "gtkprivate.h"
#include "gtkwidgetpath.h"
#include "gtkwidgetprivate.h"
#include "gtkdnd.h"
#include "gtkintl.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkwindowprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkiconprivate.h"
#include "a11y/gtkmenuaccessible.h"
#include "gdk/gdk-private.h"
#define NAVIGATION_REGION_OVERSHOOT 50 /* How much the navigation region
* extends below the submenu
*/
#define MENU_SCROLL_STEP1 8
#define MENU_SCROLL_STEP2 15
#define MENU_SCROLL_FAST_ZONE 8
#define MENU_SCROLL_TIMEOUT1 50
#define MENU_SCROLL_TIMEOUT2 20
#define MENU_POPUP_DELAY 225
#define MENU_POPDOWN_DELAY 1000
#define ATTACH_INFO_KEY "gtk-menu-child-attach-info-key"
#define ATTACHED_MENUS "gtk-attached-menus"
typedef struct _GtkMenuAttachData GtkMenuAttachData;
typedef struct _GtkMenuPopdownData GtkMenuPopdownData;
struct _GtkMenuAttachData
{
GtkWidget *attach_widget;
GtkMenuDetachFunc detacher;
};
struct _GtkMenuPopdownData
{
GtkMenu *menu;
GdkDevice *device;
};
typedef struct
{
gint left_attach;
gint right_attach;
gint top_attach;
gint bottom_attach;
gint effective_left_attach;
gint effective_right_attach;
gint effective_top_attach;
gint effective_bottom_attach;
} AttachInfo;
enum {
MOVE_SCROLL,
POPPED_UP,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_ACTIVE,
PROP_ACCEL_GROUP,
PROP_ACCEL_PATH,
PROP_ATTACH_WIDGET,
PROP_TEAROFF_STATE,
PROP_TEAROFF_TITLE,
PROP_MONITOR,
PROP_RESERVE_TOGGLE_SIZE,
PROP_ANCHOR_HINTS,
PROP_RECT_ANCHOR_DX,
PROP_RECT_ANCHOR_DY,
PROP_MENU_TYPE_HINT
};
enum {
CHILD_PROP_0,
CHILD_PROP_LEFT_ATTACH,
CHILD_PROP_RIGHT_ATTACH,
CHILD_PROP_TOP_ATTACH,
CHILD_PROP_BOTTOM_ATTACH
};
static void gtk_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_menu_finalize (GObject *object);
static void gtk_menu_set_child_property(GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_menu_get_child_property(GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_menu_destroy (GtkWidget *widget);
static void gtk_menu_realize (GtkWidget *widget);
static void gtk_menu_unrealize (GtkWidget *widget);
static void gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_menu_show (GtkWidget *widget);
static void gtk_menu_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot);
static gboolean gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event);
static gboolean gtk_menu_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_menu_enter_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_menu_leave_notify (GtkWidget *widget,
GdkEventCrossing *event);
static void gtk_menu_scroll_to (GtkMenu *menu,
gint offset);
static void gtk_menu_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
static gboolean gtk_menu_captured_event (GtkWidget *widget,
GdkEvent *event);
static void gtk_menu_stop_scrolling (GtkMenu *menu);
static void gtk_menu_remove_scroll_timeout (GtkMenu *menu);
static gboolean gtk_menu_scroll_timeout (gpointer data);
static void gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
GtkWidget *menu_item);
static void gtk_menu_select_item (GtkMenuShell *menu_shell,
GtkWidget *menu_item);
static void gtk_menu_real_insert (GtkMenuShell *menu_shell,
GtkWidget *child,
gint position);
static void gtk_menu_handle_scrolling (GtkMenu *menu,
gint event_x,
gint event_y,
gboolean enter,
gboolean motion);
static gboolean gtk_menu_focus (GtkWidget *widget,
GtkDirectionType direction);
static gint gtk_menu_get_popup_delay (GtkMenuShell *menu_shell);
static void gtk_menu_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction);
static void gtk_menu_real_move_scroll (GtkMenu *menu,
GtkScrollType type);
static void gtk_menu_stop_navigating_submenu (GtkMenu *menu);
static gboolean gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y);
static void gtk_menu_deactivate (GtkMenuShell *menu_shell);
static void gtk_menu_position (GtkMenu *menu,
gboolean set_scroll_offset);
static void gtk_menu_remove (GtkContainer *menu,
GtkWidget *widget);
static void menu_grab_transfer_window_destroy (GtkMenu *menu);
static GdkWindow *menu_grab_transfer_window_get (GtkMenu *menu);
static gboolean gtk_menu_real_can_activate_accel (GtkWidget *widget,
guint signal_id);
static void _gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed);
static void gtk_menu_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_menu_pressed_cb (GtkGestureMultiPress *gesture,
int n_press,
double x,
double y,
gpointer user_data);
static void gtk_menu_released_cb (GtkGestureMultiPress *gesture,
int n_press,
double x,
double y,
gpointer user_data);
static const gchar attach_data_key[] = "gtk-menu-attach-data";
static guint menu_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_PRIVATE (GtkMenu, gtk_menu, GTK_TYPE_MENU_SHELL)
static void
menu_queue_resize (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
priv->have_layout = FALSE;
gtk_widget_queue_resize (GTK_WIDGET (menu));
}
static void
attach_info_free (AttachInfo *info)
{
g_slice_free (AttachInfo, info);
}
static AttachInfo *
get_attach_info (GtkWidget *child)
{
GObject *object = G_OBJECT (child);
AttachInfo *ai = g_object_get_data (object, ATTACH_INFO_KEY);
if (!ai)
{
ai = g_slice_new0 (AttachInfo);
g_object_set_data_full (object, I_(ATTACH_INFO_KEY), ai,
(GDestroyNotify) attach_info_free);
}
return ai;
}
static gboolean
is_grid_attached (AttachInfo *ai)
{
return (ai->left_attach >= 0 &&
ai->right_attach >= 0 &&
ai->top_attach >= 0 &&
ai->bottom_attach >= 0);
}
static void
menu_ensure_layout (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
if (!priv->have_layout)
{
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
GList *l;
gchar *row_occupied;
gint current_row;
gint max_right_attach;
gint max_bottom_attach;
/* Find extents of gridded portion
*/
max_right_attach = 1;
max_bottom_attach = 0;
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (is_grid_attached (ai))
{
max_bottom_attach = MAX (max_bottom_attach, ai->bottom_attach);
max_right_attach = MAX (max_right_attach, ai->right_attach);
}
}
/* Find empty rows */
row_occupied = g_malloc0 (max_bottom_attach);
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (is_grid_attached (ai))
{
gint i;
for (i = ai->top_attach; i < ai->bottom_attach; i++)
row_occupied[i] = TRUE;
}
}
/* Lay non-grid-items out in those rows
*/
current_row = 0;
for (l = menu_shell->priv->children; l; l = l->next)
{
GtkWidget *child = l->data;
AttachInfo *ai = get_attach_info (child);
if (!is_grid_attached (ai))
{
while (current_row < max_bottom_attach && row_occupied[current_row])
current_row++;
ai->effective_left_attach = 0;
ai->effective_right_attach = max_right_attach;
ai->effective_top_attach = current_row;
ai->effective_bottom_attach = current_row + 1;
current_row++;
}
else
{
ai->effective_left_attach = ai->left_attach;
ai->effective_right_attach = ai->right_attach;
ai->effective_top_attach = ai->top_attach;
ai->effective_bottom_attach = ai->bottom_attach;
}
}
g_free (row_occupied);
priv->n_rows = MAX (current_row, max_bottom_attach);
priv->n_columns = max_right_attach;
priv->have_layout = TRUE;
}
}
static gint
gtk_menu_get_n_columns (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
menu_ensure_layout (menu);
return priv->n_columns;
}
static gint
gtk_menu_get_n_rows (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
menu_ensure_layout (menu);
return priv->n_rows;
}
static void
get_effective_child_attach (GtkWidget *child,
int *l,
int *r,
int *t,
int *b)
{
GtkMenu *menu = GTK_MENU (gtk_widget_get_parent (child));
AttachInfo *ai;
menu_ensure_layout (menu);
ai = get_attach_info (child);
if (l)
*l = ai->effective_left_attach;
if (r)
*r = ai->effective_right_attach;
if (t)
*t = ai->effective_top_attach;
if (b)
*b = ai->effective_bottom_attach;
}
static void
gtk_menu_class_init (GtkMenuClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
GtkMenuShellClass *menu_shell_class = GTK_MENU_SHELL_CLASS (class);
GtkBindingSet *binding_set;
gobject_class->set_property = gtk_menu_set_property;
gobject_class->get_property = gtk_menu_get_property;
gobject_class->finalize = gtk_menu_finalize;
widget_class->destroy = gtk_menu_destroy;
widget_class->realize = gtk_menu_realize;
widget_class->unrealize = gtk_menu_unrealize;
widget_class->size_allocate = gtk_menu_size_allocate;
widget_class->show = gtk_menu_show;
widget_class->snapshot = gtk_menu_snapshot;
widget_class->scroll_event = gtk_menu_scroll;
widget_class->key_press_event = gtk_menu_key_press;
widget_class->motion_notify_event = gtk_menu_motion_notify;
widget_class->enter_notify_event = gtk_menu_enter_notify;
widget_class->leave_notify_event = gtk_menu_leave_notify;
widget_class->focus = gtk_menu_focus;
widget_class->can_activate_accel = gtk_menu_real_can_activate_accel;
widget_class->grab_notify = gtk_menu_grab_notify;
widget_class->measure = gtk_menu_measure;
container_class->remove = gtk_menu_remove;
container_class->get_child_property = gtk_menu_get_child_property;
container_class->set_child_property = gtk_menu_set_child_property;
menu_shell_class->submenu_placement = GTK_LEFT_RIGHT;
menu_shell_class->deactivate = gtk_menu_deactivate;
menu_shell_class->select_item = gtk_menu_select_item;
menu_shell_class->insert = gtk_menu_real_insert;
menu_shell_class->get_popup_delay = gtk_menu_get_popup_delay;
menu_shell_class->move_current = gtk_menu_move_current;
/**
* GtkMenu::move-scroll:
* @menu: a #GtkMenu
* @scroll_type: a #GtkScrollType
*/
menu_signals[MOVE_SCROLL] =
g_signal_new_class_handler (I_("move-scroll"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_menu_real_move_scroll),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
/**
* GtkMenu::popped-up:
* @menu: the #GtkMenu that popped up
* @flipped_rect: (nullable): the position of @menu after any possible
* flipping or %NULL if the backend can't obtain it
* @final_rect: (nullable): the final position of @menu or %NULL if the
* backend can't obtain it
* @flipped_x: %TRUE if the anchors were flipped horizontally
* @flipped_y: %TRUE if the anchors were flipped vertically
*
* Emitted when the position of @menu is finalized after being popped up
* using gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (), or
* gtk_menu_popup_at_pointer ().
*
* @menu might be flipped over the anchor rectangle in order to keep it
* on-screen, in which case @flipped_x and @flipped_y will be set to %TRUE
* accordingly.
*
* @flipped_rect is the ideal position of @menu after any possible flipping,
* but before any possible sliding. @final_rect is @flipped_rect, but possibly
* translated in the case that flipping is still ineffective in keeping @menu
* on-screen.
*
* ![](popup-slide.png)
*
* The blue menu is @menu's ideal position, the green menu is @flipped_rect,
* and the red menu is @final_rect.
*
* See gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (),
* gtk_menu_popup_at_pointer (), #GtkMenu:anchor-hints,
* #GtkMenu:rect-anchor-dx, #GtkMenu:rect-anchor-dy, and
* #GtkMenu:menu-type-hint.
*
* Since: 3.22
* Stability: Unstable
*/
menu_signals[POPPED_UP] =
g_signal_new_class_handler (I_("popped-up"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_FIRST,
NULL,
NULL,
NULL,
_gtk_marshal_VOID__POINTER_POINTER_BOOLEAN_BOOLEAN,
G_TYPE_NONE,
4,
G_TYPE_POINTER,
G_TYPE_POINTER,
G_TYPE_BOOLEAN,
G_TYPE_BOOLEAN);
/**
* GtkMenu:active:
*
* The index of the currently selected menu item, or -1 if no
* menu item is selected.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACTIVE,
g_param_spec_int ("active",
P_("Active"),
P_("The currently selected menu item"),
-1, G_MAXINT, -1,
GTK_PARAM_READWRITE));
/**
* GtkMenu:accel-group:
*
* The accel group holding accelerators for the menu.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACCEL_GROUP,
g_param_spec_object ("accel-group",
P_("Accel Group"),
P_("The accel group holding accelerators for the menu"),
GTK_TYPE_ACCEL_GROUP,
GTK_PARAM_READWRITE));
/**
* GtkMenu:accel-path:
*
* An accel path used to conveniently construct accel paths of child items.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ACCEL_PATH,
g_param_spec_string ("accel-path",
P_("Accel Path"),
P_("An accel path used to conveniently construct accel paths of child items"),
NULL,
GTK_PARAM_READWRITE));
/**
* GtkMenu:attach-widget:
*
* The widget the menu is attached to. Setting this property attaches
* the menu without a #GtkMenuDetachFunc. If you need to use a detacher,
* use gtk_menu_attach_to_widget() directly.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_ATTACH_WIDGET,
g_param_spec_object ("attach-widget",
P_("Attach Widget"),
P_("The widget the menu is attached to"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE));
/**
* GtkMenu:monitor:
*
* The monitor the menu will be popped up on.
*
* Since: 2.14
**/
g_object_class_install_property (gobject_class,
PROP_MONITOR,
g_param_spec_int ("monitor",
P_("Monitor"),
P_("The monitor the menu will be popped up on"),
-1, G_MAXINT, -1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenu:reserve-toggle-size:
*
* A boolean that indicates whether the menu reserves space for
* toggles and icons, regardless of their actual presence.
*
* This property should only be changed from its default value
* for special-purposes such as tabular menus. Regular menus that
* are connected to a menu bar or context menus should reserve
* toggle space for consistency.
*
* Since: 2.18
*/
g_object_class_install_property (gobject_class,
PROP_RESERVE_TOGGLE_SIZE,
g_param_spec_boolean ("reserve-toggle-size",
P_("Reserve Toggle Size"),
P_("A boolean that indicates whether the menu reserves space for toggles and icons"),
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenu:anchor-hints:
*
* Positioning hints for aligning the menu relative to a rectangle.
*
* These hints determine how the menu should be positioned in the case that
* the menu would fall off-screen if placed in its ideal position.
*
* ![](popup-flip.png)
*
* For example, %GDK_ANCHOR_FLIP_Y will replace %GDK_GRAVITY_NORTH_WEST with
* %GDK_GRAVITY_SOUTH_WEST and vice versa if the menu extends beyond the
* bottom edge of the monitor.
*
* See gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (),
* gtk_menu_popup_at_pointer (), #GtkMenu:rect-anchor-dx,
* #GtkMenu:rect-anchor-dy, #GtkMenu:menu-type-hint, and #GtkMenu::popped-up.
*
* Since: 3.22
* Stability: Unstable
*/
g_object_class_install_property (gobject_class,
PROP_ANCHOR_HINTS,
g_param_spec_flags ("anchor-hints",
P_("Anchor hints"),
P_("Positioning hints for when the menu might fall off-screen"),
GDK_TYPE_ANCHOR_HINTS,
GDK_ANCHOR_FLIP |
GDK_ANCHOR_SLIDE |
GDK_ANCHOR_RESIZE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB |
G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenu:rect-anchor-dx:
*
* Horizontal offset to apply to the menu, i.e. the rectangle or widget
* anchor.
*
* See gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (),
* gtk_menu_popup_at_pointer (), #GtkMenu:anchor-hints,
* #GtkMenu:rect-anchor-dy, #GtkMenu:menu-type-hint, and #GtkMenu::popped-up.
*
* Since: 3.22
* Stability: Unstable
*/
g_object_class_install_property (gobject_class,
PROP_RECT_ANCHOR_DX,
g_param_spec_int ("rect-anchor-dx",
P_("Rect anchor dx"),
P_("Rect anchor horizontal offset"),
G_MININT,
G_MAXINT,
0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB |
G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenu:rect-anchor-dy:
*
* Vertical offset to apply to the menu, i.e. the rectangle or widget anchor.
*
* See gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (),
* gtk_menu_popup_at_pointer (), #GtkMenu:anchor-hints,
* #GtkMenu:rect-anchor-dx, #GtkMenu:menu-type-hint, and #GtkMenu::popped-up.
*
* Since: 3.22
* Stability: Unstable
*/
g_object_class_install_property (gobject_class,
PROP_RECT_ANCHOR_DY,
g_param_spec_int ("rect-anchor-dy",
P_("Rect anchor dy"),
P_("Rect anchor vertical offset"),
G_MININT,
G_MAXINT,
0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB |
G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkMenu:menu-type-hint:
*
* The #GdkWindowTypeHint to use for the menu's #GdkWindow.
*
* See gtk_menu_popup_at_rect (), gtk_menu_popup_at_widget (),
* gtk_menu_popup_at_pointer (), #GtkMenu:anchor-hints,
* #GtkMenu:rect-anchor-dx, #GtkMenu:rect-anchor-dy, and #GtkMenu::popped-up.
*
* Since: 3.22
* Stability: Unstable
*/
g_object_class_install_property (gobject_class,
PROP_MENU_TYPE_HINT,
g_param_spec_enum ("menu-type-hint",
P_("Menu type hint"),
P_("Menu window type hint"),
GDK_TYPE_WINDOW_TYPE_HINT,
GDK_WINDOW_TYPE_HINT_POPUP_MENU,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB |
G_PARAM_EXPLICIT_NOTIFY));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_ATTACH,
g_param_spec_int ("left-attach",
P_("Left Attach"),
P_("The column number to attach the left side of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_ATTACH,
g_param_spec_int ("right-attach",
P_("Right Attach"),
P_("The column number to attach the right side of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_ATTACH,
g_param_spec_int ("top-attach",
P_("Top Attach"),
P_("The row number to attach the top of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_ATTACH,
g_param_spec_int ("bottom-attach",
P_("Bottom Attach"),
P_("The row number to attach the bottom of the child to"),
-1, INT_MAX, -1,
GTK_PARAM_READWRITE));
binding_set = gtk_binding_set_by_class (class);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Up, 0,
I_("move-current"), 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Up, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Down, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Left, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Right, 0,
"move-current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Home, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Home, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_End, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_End, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Page_Up, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Page_Up, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Page_Down, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Page_Down, 0,
"move-scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_MENU_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "menu");
}
static void
gtk_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_ACTIVE:
gtk_menu_set_active (menu, g_value_get_int (value));
break;
case PROP_ACCEL_GROUP:
gtk_menu_set_accel_group (menu, g_value_get_object (value));
break;
case PROP_ACCEL_PATH:
gtk_menu_set_accel_path (menu, g_value_get_string (value));
break;
case PROP_ATTACH_WIDGET:
{
GtkWidget *widget;
widget = gtk_menu_get_attach_widget (menu);
if (widget)
gtk_menu_detach (menu);
widget = (GtkWidget*) g_value_get_object (value);
if (widget)
gtk_menu_attach_to_widget (menu, widget, NULL);
}
break;
case PROP_MONITOR:
gtk_menu_set_monitor (menu, g_value_get_int (value));
break;
case PROP_RESERVE_TOGGLE_SIZE:
gtk_menu_set_reserve_toggle_size (menu, g_value_get_boolean (value));
break;
case PROP_ANCHOR_HINTS:
if (menu->priv->anchor_hints != g_value_get_flags (value))
{
menu->priv->anchor_hints = g_value_get_flags (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_RECT_ANCHOR_DX:
if (menu->priv->rect_anchor_dx != g_value_get_int (value))
{
menu->priv->rect_anchor_dx = g_value_get_int (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_RECT_ANCHOR_DY:
if (menu->priv->rect_anchor_dy != g_value_get_int (value))
{
menu->priv->rect_anchor_dy = g_value_get_int (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_MENU_TYPE_HINT:
if (menu->priv->menu_type_hint != g_value_get_enum (value))
{
menu->priv->menu_type_hint = g_value_get_enum (value);
g_object_notify_by_pspec (object, pspec);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_ACTIVE:
g_value_set_int (value, g_list_index (GTK_MENU_SHELL (menu)->priv->children, gtk_menu_get_active (menu)));
break;
case PROP_ACCEL_GROUP:
g_value_set_object (value, gtk_menu_get_accel_group (menu));
break;
case PROP_ACCEL_PATH:
g_value_set_string (value, gtk_menu_get_accel_path (menu));
break;
case PROP_ATTACH_WIDGET:
g_value_set_object (value, gtk_menu_get_attach_widget (menu));
break;
case PROP_MONITOR:
g_value_set_int (value, gtk_menu_get_monitor (menu));
break;
case PROP_RESERVE_TOGGLE_SIZE:
g_value_set_boolean (value, gtk_menu_get_reserve_toggle_size (menu));
break;
case PROP_ANCHOR_HINTS:
g_value_set_flags (value, menu->priv->anchor_hints);
break;
case PROP_RECT_ANCHOR_DX:
g_value_set_int (value, menu->priv->rect_anchor_dx);
break;
case PROP_RECT_ANCHOR_DY:
g_value_set_int (value, menu->priv->rect_anchor_dy);
break;
case PROP_MENU_TYPE_HINT:
g_value_set_enum (value, menu->priv->menu_type_hint);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_menu_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (container);
AttachInfo *ai = get_attach_info (child);
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
ai->left_attach = g_value_get_int (value);
break;
case CHILD_PROP_RIGHT_ATTACH:
ai->right_attach = g_value_get_int (value);
break;
case CHILD_PROP_TOP_ATTACH:
ai->top_attach = g_value_get_int (value);
break;
case CHILD_PROP_BOTTOM_ATTACH:
ai->bottom_attach = g_value_get_int (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
menu_queue_resize (menu);
}
static void
gtk_menu_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
AttachInfo *ai = get_attach_info (child);
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
g_value_set_int (value, ai->left_attach);
break;
case CHILD_PROP_RIGHT_ATTACH:
g_value_set_int (value, ai->right_attach);
break;
case CHILD_PROP_TOP_ATTACH:
g_value_set_int (value, ai->top_attach);
break;
case CHILD_PROP_BOTTOM_ATTACH:
g_value_set_int (value, ai->bottom_attach);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
}
static gboolean
gtk_menu_window_event (GtkWidget *window,
GdkEvent *event,
GtkWidget *menu)
{
gboolean handled = FALSE;
g_object_ref (window);
g_object_ref (menu);
switch (event->type)
{
case GDK_WINDOW_STATE:
/* Window for the menu has been closed by the display server or by GDK.
* Update the internal state as if the user had clicked outside the
* menu
*/
if (event->window_state.new_window_state & GDK_WINDOW_STATE_WITHDRAWN &&
event->window_state.changed_mask & GDK_WINDOW_STATE_WITHDRAWN)
gtk_menu_shell_deactivate (GTK_MENU_SHELL(menu));
break;
default:
break;
}
g_object_unref (window);
g_object_unref (menu);
return handled;
}
static void
gtk_menu_init (GtkMenu *menu)
{
GtkMenuPrivate *priv;
priv = gtk_menu_get_instance_private (menu);
menu->priv = priv;
priv->toplevel = gtk_window_new (GTK_WINDOW_POPUP);
gtk_container_add (GTK_CONTAINER (priv->toplevel), GTK_WIDGET (menu));
g_signal_connect (priv->toplevel, "event", G_CALLBACK (gtk_menu_window_event), menu);
g_signal_connect (priv->toplevel, "destroy", G_CALLBACK (gtk_widget_destroyed), &priv->toplevel);
gtk_window_set_resizable (GTK_WINDOW (priv->toplevel), FALSE);
gtk_window_set_mnemonic_modifier (GTK_WINDOW (priv->toplevel), 0);
_gtk_window_request_csd (GTK_WINDOW (priv->toplevel));
gtk_style_context_add_class (gtk_widget_get_style_context (priv->toplevel),
GTK_STYLE_CLASS_POPUP);
/* Refloat the menu, so that reference counting for the menu isn't
* affected by it being a child of the toplevel
*/
g_object_force_floating (G_OBJECT (menu));
priv->needs_destruction_ref = TRUE;
priv->monitor_num = -1;
priv->drag_start_y = -1;
priv->anchor_hints = GDK_ANCHOR_FLIP | GDK_ANCHOR_SLIDE | GDK_ANCHOR_RESIZE;
priv->rect_anchor_dx = 0;
priv->rect_anchor_dy = 0;
priv->menu_type_hint = GDK_WINDOW_TYPE_HINT_POPUP_MENU;
_gtk_widget_set_captured_event_handler (GTK_WIDGET (menu), gtk_menu_captured_event);
priv->top_arrow_widget = gtk_icon_new ("arrow");
gtk_style_context_add_class (gtk_widget_get_style_context (priv->top_arrow_widget),
GTK_STYLE_CLASS_TOP);
gtk_widget_set_parent (priv->top_arrow_widget, GTK_WIDGET (menu));
gtk_widget_hide (priv->top_arrow_widget);
priv->bottom_arrow_widget = gtk_icon_new ("arrow");
gtk_style_context_add_class (gtk_widget_get_style_context (priv->bottom_arrow_widget),
GTK_STYLE_CLASS_BOTTOM);
gtk_widget_set_parent (priv->bottom_arrow_widget, GTK_WIDGET (menu));
gtk_widget_hide (priv->bottom_arrow_widget);
priv->click_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (menu));
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->click_gesture), FALSE);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->click_gesture), 0);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->click_gesture), GTK_PHASE_BUBBLE);
g_signal_connect (priv->click_gesture, "pressed", G_CALLBACK (gtk_menu_pressed_cb), menu);
g_signal_connect (priv->click_gesture, "released", G_CALLBACK (gtk_menu_released_cb), menu);
}
static void
moved_to_rect_cb (GdkWindow *window,
const GdkRectangle *flipped_rect,
const GdkRectangle *final_rect,
gboolean flipped_x,
gboolean flipped_y,
GtkMenu *menu)
{
g_signal_emit (menu,
menu_signals[POPPED_UP],
0,
flipped_rect,
final_rect,
flipped_x,
flipped_y);
}
static void
gtk_menu_destroy (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkMenuAttachData *data;
gtk_menu_remove_scroll_timeout (menu);
data = g_object_get_data (G_OBJECT (widget), attach_data_key);
if (data)
gtk_menu_detach (menu);
gtk_menu_stop_navigating_submenu (menu);
g_clear_object (&priv->old_active_menu_item);
/* Add back the reference count for being a child */
if (priv->needs_destruction_ref)
{
priv->needs_destruction_ref = FALSE;
g_object_ref (widget);
}
g_clear_object (&priv->accel_group);
if (priv->toplevel)
{
g_signal_handlers_disconnect_by_func (priv->toplevel, moved_to_rect_cb, menu);
gtk_widget_destroy (priv->toplevel);
}
g_clear_pointer (&priv->heights, g_free);
if (priv->position_func_data_destroy)
{
priv->position_func_data_destroy (priv->position_func_data);
priv->position_func_data = NULL;
priv->position_func_data_destroy = NULL;
}
GTK_WIDGET_CLASS (gtk_menu_parent_class)->destroy (widget);
}
static void
gtk_menu_finalize (GObject *object)
{
GtkMenu *menu = GTK_MENU (object);
GtkMenuPrivate *priv = menu->priv;
gtk_widget_unparent (priv->top_arrow_widget);
gtk_widget_unparent (priv->bottom_arrow_widget);
g_clear_object (&priv->click_gesture);
G_OBJECT_CLASS (gtk_menu_parent_class)->finalize (object);
}
static void
menu_change_screen (GtkMenu *menu,
GdkScreen *new_screen)
{
GtkMenuPrivate *priv = menu->priv;
if (gtk_widget_has_screen (GTK_WIDGET (menu)))
{
if (new_screen == gtk_widget_get_screen (GTK_WIDGET (menu)))
return;
}
gtk_window_set_screen (GTK_WINDOW (priv->toplevel), new_screen);
priv->monitor_num = -1;
}
static void
attach_widget_screen_changed (GtkWidget *attach_widget,
GdkScreen *previous_screen,
GtkMenu *menu)
{
if (gtk_widget_has_screen (attach_widget) &&
!g_object_get_data (G_OBJECT (menu), "gtk-menu-explicit-screen"))
menu_change_screen (menu, gtk_widget_get_screen (attach_widget));
}
static void
menu_toplevel_attached_to (GtkWindow *toplevel, GParamSpec *pspec, GtkMenu *menu)
{
GtkMenuAttachData *data;
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
g_return_if_fail (data);
gtk_menu_detach (menu);
}
/**
* gtk_menu_attach_to_widget:
* @menu: a #GtkMenu
* @attach_widget: the #GtkWidget that the menu will be attached to
* @detacher: (scope async)(allow-none): the user supplied callback function
* that will be called when the menu calls gtk_menu_detach()
*
* Attaches the menu to the widget and provides a callback function
* that will be invoked when the menu calls gtk_menu_detach() during
* its destruction.
*
* If the menu is attached to the widget then it will be destroyed
* when the widget is destroyed, as if it was a child widget.
* An attached menu will also move between screens correctly if the
* widgets moves between screens.
*/
void
gtk_menu_attach_to_widget (GtkMenu *menu,
GtkWidget *attach_widget,
GtkMenuDetachFunc detacher)
{
GtkMenuAttachData *data;
GList *list;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_WIDGET (attach_widget));
/* keep this function in sync with gtk_widget_set_parent() */
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (data)
{
g_warning ("gtk_menu_attach_to_widget(): menu already attached to %s",
g_type_name (G_TYPE_FROM_INSTANCE (data->attach_widget)));
return;
}
g_object_ref_sink (menu);
data = g_slice_new (GtkMenuAttachData);
data->attach_widget = attach_widget;
g_signal_connect (attach_widget, "screen-changed",
G_CALLBACK (attach_widget_screen_changed), menu);
attach_widget_screen_changed (attach_widget, NULL, menu);
data->detacher = detacher;
g_object_set_data (G_OBJECT (menu), I_(attach_data_key), data);
list = g_object_steal_data (G_OBJECT (attach_widget), ATTACHED_MENUS);
if (!g_list_find (list, menu))
list = g_list_prepend (list, menu);
g_object_set_data_full (G_OBJECT (attach_widget), I_(ATTACHED_MENUS), list,
(GDestroyNotify) g_list_free);
/* Attach the widget to the toplevel window. */
gtk_window_set_attached_to (GTK_WINDOW (menu->priv->toplevel), attach_widget);
g_signal_connect (GTK_WINDOW (menu->priv->toplevel), "notify::attached-to",
G_CALLBACK (menu_toplevel_attached_to), menu);
_gtk_widget_update_parent_muxer (GTK_WIDGET (menu));
g_object_notify (G_OBJECT (menu), "attach-widget");
}
/**
* gtk_menu_get_attach_widget:
* @menu: a #GtkMenu
*
* Returns the #GtkWidget that the menu is attached to.
*
* Returns: (transfer none): the #GtkWidget that the menu is attached to
*/
GtkWidget*
gtk_menu_get_attach_widget (GtkMenu *menu)
{
GtkMenuAttachData *data;
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (data)
return data->attach_widget;
return NULL;
}
/**
* gtk_menu_detach:
* @menu: a #GtkMenu
*
* Detaches the menu from the widget to which it had been attached.
* This function will call the callback function, @detacher, provided
* when the gtk_menu_attach_to_widget() function was called.
*/
void
gtk_menu_detach (GtkMenu *menu)
{
GtkWindow *toplevel;
GtkMenuAttachData *data;
GList *list;
g_return_if_fail (GTK_IS_MENU (menu));
toplevel = GTK_WINDOW (menu->priv->toplevel);
/* keep this function in sync with gtk_widget_unparent() */
data = g_object_get_data (G_OBJECT (menu), attach_data_key);
if (!data)
{
g_warning ("gtk_menu_detach(): menu is not attached");
return;
}
g_object_set_data (G_OBJECT (menu), I_(attach_data_key), NULL);
/* Detach the toplevel window. */
g_signal_handlers_disconnect_by_func (toplevel,
(gpointer) menu_toplevel_attached_to,
menu);
if (gtk_window_get_attached_to (toplevel) == data->attach_widget)
gtk_window_set_attached_to (toplevel, NULL);
g_signal_handlers_disconnect_by_func (data->attach_widget,
(gpointer) attach_widget_screen_changed,
menu);
if (data->detacher)
data->detacher (data->attach_widget, menu);
list = g_object_steal_data (G_OBJECT (data->attach_widget), ATTACHED_MENUS);
list = g_list_remove (list, menu);
if (list)
g_object_set_data_full (G_OBJECT (data->attach_widget), I_(ATTACHED_MENUS), list,
(GDestroyNotify) g_list_free);
else
g_object_set_data (G_OBJECT (data->attach_widget), I_(ATTACHED_MENUS), NULL);
if (gtk_widget_get_realized (GTK_WIDGET (menu)))
gtk_widget_unrealize (GTK_WIDGET (menu));
g_slice_free (GtkMenuAttachData, data);
_gtk_widget_update_parent_muxer (GTK_WIDGET (menu));
g_object_notify (G_OBJECT (menu), "attach-widget");
g_object_unref (menu);
}
static void
gtk_menu_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (container);
GtkMenuPrivate *priv = menu->priv;
/* Clear out old_active_menu_item if it matches the item we are removing */
if (priv->old_active_menu_item == widget)
g_clear_object (&priv->old_active_menu_item);
GTK_CONTAINER_CLASS (gtk_menu_parent_class)->remove (container, widget);
g_object_set_data (G_OBJECT (widget), I_(ATTACH_INFO_KEY), NULL);
menu_queue_resize (menu);
}
/**
* gtk_menu_new:
*
* Creates a new #GtkMenu
*
* Returns: a new #GtkMenu
*/
GtkWidget*
gtk_menu_new (void)
{
return g_object_new (GTK_TYPE_MENU, NULL);
}
static void
gtk_menu_real_insert (GtkMenuShell *menu_shell,
GtkWidget *child,
gint position)
{
GtkMenu *menu = GTK_MENU (menu_shell);
GtkMenuPrivate *priv = menu->priv;
AttachInfo *ai = get_attach_info (child);
ai->left_attach = -1;
ai->right_attach = -1;
ai->top_attach = -1;
ai->bottom_attach = -1;
gtk_widget_insert_before (child, GTK_WIDGET (menu), priv->bottom_arrow_widget);
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->insert (menu_shell, child, position);
menu_queue_resize (menu);
}
static gboolean
popup_grab_on_window (GdkWindow *window,
GdkDevice *pointer)
{
GdkGrabStatus status;
GdkSeat *seat;
seat = gdk_device_get_seat (pointer);
status = gdk_seat_grab (seat, window,
GDK_SEAT_CAPABILITY_ALL, TRUE,
NULL, NULL, NULL, NULL);
return status == GDK_GRAB_SUCCESS;
}
static void
associate_menu_grab_transfer_window (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GdkWindow *toplevel_window;
GdkWindow *transfer_window;
toplevel_window = gtk_widget_get_window (priv->toplevel);
transfer_window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
if (toplevel_window == NULL || transfer_window == NULL)
return;
g_object_set_data (G_OBJECT (toplevel_window), I_("gdk-attached-grab-window"), transfer_window);
}
static void
gtk_menu_popup_internal (GtkMenu *menu,
GdkDevice *device,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
GDestroyNotify destroy,
guint button,
guint32 activate_time)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget;
GtkWidget *xgrab_shell;
GtkWidget *parent;
GdkEvent *current_event;
GtkMenuShell *menu_shell;
gboolean grab_keyboard;
GtkWidget *parent_toplevel;
GdkDevice *pointer, *source_device = NULL;
GdkDisplay *display;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (device == NULL || GDK_IS_DEVICE (device));
display = gtk_widget_get_display (GTK_WIDGET (menu));
if (device == NULL)
device = gtk_get_current_event_device ();
if (device && gdk_device_get_display (device) != display)
device = NULL;
if (device == NULL)
device = gdk_seat_get_pointer (gdk_display_get_default_seat (display));
widget = GTK_WIDGET (menu);
menu_shell = GTK_MENU_SHELL (menu);
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
pointer = gdk_device_get_associated_device (device);
else
pointer = device;
menu_shell->priv->parent_menu_shell = parent_menu_shell;
priv->seen_item_enter = FALSE;
/* Find the last viewable ancestor, and make an X grab on it
*/
parent = GTK_WIDGET (menu);
xgrab_shell = NULL;
while (parent)
{
gboolean viewable = TRUE;
GtkWidget *tmp = parent;
while (tmp)
{
if (!gtk_widget_get_mapped (tmp))
{
viewable = FALSE;
break;
}
tmp = gtk_widget_get_parent (tmp);
}
if (viewable)
xgrab_shell = parent;
parent = GTK_MENU_SHELL (parent)->priv->parent_menu_shell;
}
/* We want to receive events generated when we map the menu;
* unfortunately, since there is probably already an implicit
* grab in place from the button that the user used to pop up
* the menu, we won't receive then -- in particular, the EnterNotify
* when the menu pops up under the pointer.
*
* If we are grabbing on a parent menu shell, no problem; just grab
* on that menu shell first before popping up the window with
* owner_events = TRUE.
*
* When grabbing on the menu itself, things get more convoluted --
* we do an explicit grab on a specially created window with
* owner_events = TRUE, which we override further down with a
* grab on the menu. (We can't grab on the menu until it is mapped;
* we probably could just leave the grab on the other window,
* with a little reorganization of the code in gtkmenu*).
*/
grab_keyboard = gtk_menu_shell_get_take_focus (menu_shell);
gtk_window_set_accept_focus (GTK_WINDOW (priv->toplevel), grab_keyboard);
if (xgrab_shell && xgrab_shell != widget)
{
if (popup_grab_on_window (gtk_widget_get_window (xgrab_shell), pointer))
{
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (xgrab_shell), pointer);
GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab = TRUE;
}
}
else
{
GdkWindow *transfer_window;
xgrab_shell = widget;
transfer_window = menu_grab_transfer_window_get (menu);
if (popup_grab_on_window (transfer_window, pointer))
{
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (xgrab_shell), pointer);
GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab = TRUE;
}
}
if (!GTK_MENU_SHELL (xgrab_shell)->priv->have_xgrab)
{
/* We failed to make our pointer/keyboard grab.
* Rather than leaving the user with a stuck up window,
* we just abort here. Presumably the user will try again.
*/
menu_shell->priv->parent_menu_shell = NULL;
menu_grab_transfer_window_destroy (menu);
return;
}
_gtk_menu_shell_set_grab_device (GTK_MENU_SHELL (menu), pointer);
menu_shell->priv->active = TRUE;
menu_shell->priv->button = button;
/* If we are popping up the menu from something other than, a button
* press then, as a heuristic, we ignore enter events for the menu
* until we get a MOTION_NOTIFY.
*/
current_event = gtk_get_current_event ();
if (current_event)
{
if ((current_event->type != GDK_BUTTON_PRESS) &&
(current_event->type != GDK_ENTER_NOTIFY))
menu_shell->priv->ignore_enter = TRUE;
source_device = gdk_event_get_source_device (current_event);
gdk_event_free (current_event);
}
else
menu_shell->priv->ignore_enter = TRUE;
parent_toplevel = NULL;
if (parent_menu_shell)
parent_toplevel = gtk_widget_get_toplevel (parent_menu_shell);
else if (!g_object_get_data (G_OBJECT (menu), "gtk-menu-explicit-screen"))
{
GtkWidget *attach_widget = gtk_menu_get_attach_widget (menu);
if (attach_widget)
parent_toplevel = gtk_widget_get_toplevel (attach_widget);
}
/* Set transient for to get the right window group and parent */
if (GTK_IS_WINDOW (parent_toplevel))
gtk_window_set_transient_for (GTK_WINDOW (priv->toplevel),
GTK_WINDOW (parent_toplevel));
priv->parent_menu_item = parent_menu_item;
priv->position_func = func;
priv->position_func_data = data;
priv->position_func_data_destroy = destroy;
menu_shell->priv->activate_time = activate_time;
/* We need to show the menu here rather in the init function
* because code expects to be able to tell if the menu is onscreen
* by looking at gtk_widget_get_visible (menu)
*/
gtk_widget_show (GTK_WIDGET (menu));
/* Position the menu, possibly changing the size request
*/
gtk_menu_position (menu, TRUE);
associate_menu_grab_transfer_window (menu);
gtk_menu_scroll_to (menu, priv->scroll_offset);
/* if no item is selected, select the first one */
if (!menu_shell->priv->active_menu_item &&
source_device && gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN)
gtk_menu_shell_select_first (menu_shell, TRUE);
/* Once everything is set up correctly, map the toplevel */
gtk_widget_show (priv->toplevel);
if (xgrab_shell == widget)
popup_grab_on_window (gtk_widget_get_window (widget), pointer); /* Should always succeed */
gtk_grab_add (GTK_WIDGET (menu));
if (parent_menu_shell)
{
gboolean keyboard_mode;
keyboard_mode = _gtk_menu_shell_get_keyboard_mode (GTK_MENU_SHELL (parent_menu_shell));
_gtk_menu_shell_set_keyboard_mode (menu_shell, keyboard_mode);
}
else if (menu_shell->priv->button == 0) /* a keynav-activated context menu */
_gtk_menu_shell_set_keyboard_mode (menu_shell, TRUE);
_gtk_menu_shell_update_mnemonics (menu_shell);
}
/**
* gtk_menu_popup_for_device:
* @menu: a #GtkMenu
* @device: (allow-none): a #GdkDevice
* @parent_menu_shell: (allow-none): the menu shell containing the triggering
* menu item, or %NULL
* @parent_menu_item: (allow-none): the menu item whose activation triggered
* the popup, or %NULL
* @func: (allow-none): a user supplied function used to position the menu,
* or %NULL
* @data: (allow-none): user supplied data to be passed to @func
* @destroy: (allow-none): destroy notify for @data
* @button: the mouse button which was pressed to initiate the event
* @activate_time: the time at which the activation event occurred
*
* Displays a menu and makes it available for selection.
*
* Applications can use this function to display context-sensitive menus,
* and will typically supply %NULL for the @parent_menu_shell,
* @parent_menu_item, @func, @data and @destroy parameters. The default
* menu positioning function will position the menu at the current position
* of @device (or its corresponding pointer).
*
* The @button parameter should be the mouse button pressed to initiate
* the menu popup. If the menu popup was initiated by something other than
* a mouse button press, such as a mouse button release or a keypress,
* @button should be 0.
*
* The @activate_time parameter is used to conflict-resolve initiation of
* concurrent requests for mouse/keyboard grab requests. To function
* properly, this needs to be the time stamp of the user event (such as
* a mouse click or key press) that caused the initiation of the popup.
* Only if no such event is available, gtk_get_current_event_time() can
* be used instead.
*
* Since: 3.0
*/
void
gtk_menu_popup_for_device (GtkMenu *menu,
GdkDevice *device,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
GDestroyNotify destroy,
guint button,
guint32 activate_time)
{
GtkMenuPrivate *priv;
g_return_if_fail (GTK_IS_MENU (menu));
priv = menu->priv;
priv->rect_window = NULL;
priv->widget = NULL;
gtk_menu_popup_internal (menu,
device,
parent_menu_shell,
parent_menu_item,
func,
data,
destroy,
button,
activate_time);
}
/**
* gtk_menu_popup:
* @menu: a #GtkMenu
* @parent_menu_shell: (allow-none): the menu shell containing the
* triggering menu item, or %NULL
* @parent_menu_item: (allow-none): the menu item whose activation
* triggered the popup, or %NULL
* @func: (scope async) (allow-none): a user supplied function used to position
* the menu, or %NULL
* @data: user supplied data to be passed to @func.
* @button: the mouse button which was pressed to initiate the event.
* @activate_time: the time at which the activation event occurred.
*
* Displays a menu and makes it available for selection.
*
* Applications can use this function to display context-sensitive
* menus, and will typically supply %NULL for the @parent_menu_shell,
* @parent_menu_item, @func and @data parameters. The default menu
* positioning function will position the menu at the current mouse
* cursor position.
*
* The @button parameter should be the mouse button pressed to initiate
* the menu popup. If the menu popup was initiated by something other
* than a mouse button press, such as a mouse button release or a keypress,
* @button should be 0.
*
* The @activate_time parameter is used to conflict-resolve initiation
* of concurrent requests for mouse/keyboard grab requests. To function
* properly, this needs to be the timestamp of the user event (such as
* a mouse click or key press) that caused the initiation of the popup.
* Only if no such event is available, gtk_get_current_event_time() can
* be used instead.
*/
void
gtk_menu_popup (GtkMenu *menu,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
guint button,
guint32 activate_time)
{
g_return_if_fail (GTK_IS_MENU (menu));
gtk_menu_popup_for_device (menu,
NULL,
parent_menu_shell,
parent_menu_item,
func, data, NULL,
button, activate_time);
}
static GdkDevice *
get_device_for_event (const GdkEvent *event)
{
GdkDevice *device = NULL;
GdkSeat *seat = NULL;
GdkScreen *screen = NULL;
GdkDisplay *display = NULL;
device = gdk_event_get_device (event);
if (device)
return device;
seat = gdk_event_get_seat (event);
if (!seat)
{
screen = gdk_event_get_screen (event);
if (screen)
display = gdk_screen_get_display (screen);
if (!display)
{
g_warning ("no display for event, using default");
display = gdk_display_get_default ();
}
if (display)
seat = gdk_display_get_default_seat (display);
}
return seat ? gdk_seat_get_pointer (seat) : NULL;
}
/**
* gtk_menu_popup_at_rect:
* @menu: the #GtkMenu to pop up
* @rect_window: (not nullable): the #GdkWindow @rect is relative to
* @rect: (not nullable): the #GdkRectangle to align @menu with
* @rect_anchor: the point on @rect to align with @menu's anchor point
* @menu_anchor: the point on @menu to align with @rect's anchor point
* @trigger_event: (nullable): the #GdkEvent that initiated this request or
* %NULL if it's the current event
*
* Displays @menu and makes it available for selection.
*
* See gtk_menu_popup_at_widget () and gtk_menu_popup_at_pointer (), which
* handle more common cases for popping up menus.
*
* @menu will be positioned at @rect, aligning their anchor points. @rect is
* relative to the top-left corner of @rect_window. @rect_anchor and
* @menu_anchor determine anchor points on @rect and @menu to pin together.
* @menu can optionally be offset by #GtkMenu:rect-anchor-dx and
* #GtkMenu:rect-anchor-dy.
*
* Anchors should be specified under the assumption that the text direction is
* left-to-right; they will be flipped horizontally automatically if the text
* direction is right-to-left.
*
* Other properties that influence the behaviour of this function are
* #GtkMenu:anchor-hints and #GtkMenu:menu-type-hint. Connect to the
* #GtkMenu::popped-up signal to find out how it was actually positioned.
*
* Since: 3.22
* Stability: Unstable
*/
void
gtk_menu_popup_at_rect (GtkMenu *menu,
GdkWindow *rect_window,
const GdkRectangle *rect,
GdkGravity rect_anchor,
GdkGravity menu_anchor,
const GdkEvent *trigger_event)
{
GtkMenuPrivate *priv;
GdkEvent *current_event = NULL;
GdkDevice *device = NULL;
guint button = 0;
guint32 activate_time = GDK_CURRENT_TIME;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GDK_IS_WINDOW (rect_window));
g_return_if_fail (rect);
priv = menu->priv;
priv->rect_window = rect_window;
priv->rect = *rect;
priv->widget = NULL;
priv->rect_anchor = rect_anchor;
priv->menu_anchor = menu_anchor;
if (!trigger_event)
{
current_event = gtk_get_current_event ();
trigger_event = current_event;
}
if (trigger_event)
{
device = get_device_for_event (trigger_event);
gdk_event_get_button (trigger_event, &button);
activate_time = gdk_event_get_time (trigger_event);
}
else
g_warning ("no trigger event for menu popup");
gtk_menu_popup_internal (menu,
device,
NULL,
NULL,
NULL,
NULL,
NULL,
button,
activate_time);
g_clear_pointer (&current_event, gdk_event_free);
}
/**
* gtk_menu_popup_at_widget:
* @menu: the #GtkMenu to pop up
* @widget: (not nullable): the #GtkWidget to align @menu with
* @widget_anchor: the point on @widget to align with @menu's anchor point
* @menu_anchor: the point on @menu to align with @widget's anchor point
* @trigger_event: (nullable): the #GdkEvent that initiated this request or
* %NULL if it's the current event
*
* Displays @menu and makes it available for selection.
*
* See gtk_menu_popup_at_pointer () to pop up a menu at the master pointer.
* gtk_menu_popup_at_rect () also allows you to position a menu at an arbitrary
* rectangle.
*
* ![](popup-anchors.png)
*
* @menu will be positioned at @widget, aligning their anchor points.
* @widget_anchor and @menu_anchor determine anchor points on @widget and @menu
* to pin together. @menu can optionally be offset by #GtkMenu:rect-anchor-dx
* and #GtkMenu:rect-anchor-dy.
*
* Anchors should be specified under the assumption that the text direction is
* left-to-right; they will be flipped horizontally automatically if the text
* direction is right-to-left.
*
* Other properties that influence the behaviour of this function are
* #GtkMenu:anchor-hints and #GtkMenu:menu-type-hint. Connect to the
* #GtkMenu::popped-up signal to find out how it was actually positioned.
*
* Since: 3.22
* Stability: Unstable
*/
void
gtk_menu_popup_at_widget (GtkMenu *menu,
GtkWidget *widget,
GdkGravity widget_anchor,
GdkGravity menu_anchor,
const GdkEvent *trigger_event)
{
GtkMenuPrivate *priv;
GdkEvent *current_event = NULL;
GdkDevice *device = NULL;
guint button = 0;
guint32 activate_time = GDK_CURRENT_TIME;
GtkWidget *parent_menu_shell = NULL;
GtkWidget *parent_menu_item = NULL;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = menu->priv;
priv->rect_window = NULL;
priv->widget = widget;
priv->rect_anchor = widget_anchor;
priv->menu_anchor = menu_anchor;
if (!trigger_event)
{
current_event = gtk_get_current_event ();
trigger_event = current_event;
}
if (trigger_event)
{
device = get_device_for_event (trigger_event);
gdk_event_get_button (trigger_event, &button);
activate_time = gdk_event_get_time (trigger_event);
}
else
g_warning ("no trigger event for menu popup");
if (GTK_IS_MENU_ITEM (priv->widget))
{
parent_menu_item = priv->widget;
if (GTK_IS_MENU_SHELL (gtk_widget_get_parent (parent_menu_item)))
parent_menu_shell = gtk_widget_get_parent (parent_menu_item);
}
gtk_menu_popup_internal (menu,
device,
parent_menu_shell,
parent_menu_item,
NULL,
NULL,
NULL,
button,
activate_time);
g_clear_pointer (&current_event, gdk_event_free);
}
/**
* gtk_menu_popup_at_pointer:
* @menu: the #GtkMenu to pop up
* @trigger_event: (nullable): the #GdkEvent that initiated this request or
* %NULL if it's the current event
*
* Displays @menu and makes it available for selection.
*
* See gtk_menu_popup_at_widget () to pop up a menu at a widget.
* gtk_menu_popup_at_rect () also allows you to position a menu at an arbitrary
* rectangle.
*
* @menu will be positioned at the pointer associated with @trigger_event.
*
* Properties that influence the behaviour of this function are
* #GtkMenu:anchor-hints, #GtkMenu:rect-anchor-dx, #GtkMenu:rect-anchor-dy, and
* #GtkMenu:menu-type-hint. Connect to the #GtkMenu::popped-up signal to find
* out how it was actually positioned.
*
* Since: 3.22
* Stability: Unstable
*/
void
gtk_menu_popup_at_pointer (GtkMenu *menu,
const GdkEvent *trigger_event)
{
GdkEvent *current_event = NULL;
GdkWindow *rect_window = NULL;
GdkDevice *device = NULL;
GdkRectangle rect = { 0, 0, 1, 1 };
g_return_if_fail (GTK_IS_MENU (menu));
if (!trigger_event)
{
current_event = gtk_get_current_event ();
trigger_event = current_event;
}
if (trigger_event)
{
rect_window = gdk_event_get_window (trigger_event);
if (rect_window)
{
device = get_device_for_event (trigger_event);
if (device && gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
device = gdk_device_get_associated_device (device);
if (device)
gdk_window_get_device_position (rect_window, device, &rect.x, &rect.y, NULL);
}
}
else
g_warning ("no trigger event for menu popup");
gtk_menu_popup_at_rect (menu,
rect_window,
&rect,
GDK_GRAVITY_SOUTH_EAST,
GDK_GRAVITY_NORTH_WEST,
trigger_event);
g_clear_pointer (&current_event, gdk_event_free);
}
static void
get_arrows_border (GtkMenu *menu,
GtkBorder *border)
{
GtkMenuPrivate *priv = menu->priv;
gint top_arrow_height, bottom_arrow_height;
gtk_widget_measure (priv->top_arrow_widget,
GTK_ORIENTATION_VERTICAL,
-1,
&top_arrow_height, NULL,
NULL, NULL);
gtk_widget_measure (priv->bottom_arrow_widget,
GTK_ORIENTATION_VERTICAL,
-1,
&bottom_arrow_height, NULL,
NULL, NULL);
border->top = priv->upper_arrow_visible ? top_arrow_height : 0;
border->bottom = priv->lower_arrow_visible ? bottom_arrow_height : 0;
border->left = border->right = 0;
}
/**
* gtk_menu_update_scroll_offset:
* @menu: the #GtkMenu that popped up
* @flipped_rect: (nullable): the position of @menu after any possible flipping
* or %NULL if unknown
* @final_rect: (nullable): the final position of @menu or %NULL if unknown
* @flipped_x: %TRUE if the anchors were flipped horizontally
* @flipped_y: %TRUE if the anchors were flipped vertically
* @user_data: user data
*
* Updates the scroll offset of @menu based on the amount of sliding done while
* positioning @menu. Connect this to the #GtkMenu::popped-up signal to keep the
* contents of the menu vertically aligned with their ideal position, for combo
* boxes for example.
*
* Since: 3.22
* Stability: Private
*/
void
gtk_menu_update_scroll_offset (GtkMenu *menu,
const GdkRectangle *flipped_rect,
const GdkRectangle *final_rect,
gboolean flipped_x,
gboolean flipped_y,
gpointer user_data)
{
GtkBorder arrows_border;
g_return_if_fail (GTK_IS_MENU (menu));
if (!flipped_rect || !final_rect)
return;
get_arrows_border (menu, &arrows_border);
menu->priv->scroll_offset = arrows_border.top + (final_rect->y - flipped_rect->y);
gtk_menu_scroll_to (menu, menu->priv->scroll_offset);
}
/**
* gtk_menu_popdown:
* @menu: a #GtkMenu
*
* Removes the menu from the screen.
*/
void
gtk_menu_popdown (GtkMenu *menu)
{
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
g_return_if_fail (GTK_IS_MENU (menu));
menu_shell = GTK_MENU_SHELL (menu);
priv = menu->priv;
menu_shell->priv->parent_menu_shell = NULL;
menu_shell->priv->active = FALSE;
menu_shell->priv->ignore_enter = FALSE;
priv->have_position = FALSE;
gtk_menu_stop_scrolling (menu);
gtk_menu_stop_navigating_submenu (menu);
if (menu_shell->priv->active_menu_item)
{
if (priv->old_active_menu_item)
g_object_unref (priv->old_active_menu_item);
priv->old_active_menu_item = menu_shell->priv->active_menu_item;
g_object_ref (priv->old_active_menu_item);
}
gtk_menu_shell_deselect (menu_shell);
/* The X Grab, if present, will automatically be removed
* when we hide the window
*/
if (priv->toplevel)
{
gtk_widget_hide (priv->toplevel);
gtk_window_set_transient_for (GTK_WINDOW (priv->toplevel), NULL);
}
gtk_widget_hide (GTK_WIDGET (menu));
menu_shell->priv->have_xgrab = FALSE;
gtk_grab_remove (GTK_WIDGET (menu));
_gtk_menu_shell_set_grab_device (menu_shell, NULL);
menu_grab_transfer_window_destroy (menu);
}
/**
* gtk_menu_get_active:
* @menu: a #GtkMenu
*
* Returns the selected menu item from the menu. This is used by the
* #GtkComboBox.
*
* Returns: (transfer none): the #GtkMenuItem that was last selected
* in the menu. If a selection has not yet been made, the
* first menu item is selected.
*/
GtkWidget*
gtk_menu_get_active (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *child;
GList *children;
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
if (!priv->old_active_menu_item)
{
child = NULL;
children = GTK_MENU_SHELL (menu)->priv->children;
while (children)
{
child = children->data;
children = children->next;
if (gtk_bin_get_child (GTK_BIN (child)))
break;
child = NULL;
}
priv->old_active_menu_item = child;
if (priv->old_active_menu_item)
g_object_ref (priv->old_active_menu_item);
}
return priv->old_active_menu_item;
}
/**
* gtk_menu_set_active:
* @menu: a #GtkMenu
* @index: the index of the menu item to select. Index values are
* from 0 to n-1
*
* Selects the specified menu item within the menu. This is used by
* the #GtkComboBox and should not be used by anyone else.
*/
void
gtk_menu_set_active (GtkMenu *menu,
guint index)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *child;
GList *tmp_list;
g_return_if_fail (GTK_IS_MENU (menu));
tmp_list = g_list_nth (GTK_MENU_SHELL (menu)->priv->children, index);
if (tmp_list)
{
child = tmp_list->data;
if (gtk_bin_get_child (GTK_BIN (child)))
{
if (priv->old_active_menu_item)
g_object_unref (priv->old_active_menu_item);
priv->old_active_menu_item = child;
g_object_ref (priv->old_active_menu_item);
}
}
g_object_notify (G_OBJECT (menu), "active");
}
/**
* gtk_menu_set_accel_group:
* @menu: a #GtkMenu
* @accel_group: (allow-none): the #GtkAccelGroup to be associated
* with the menu.
*
* Set the #GtkAccelGroup which holds global accelerators for the
* menu. This accelerator group needs to also be added to all windows
* that this menu is being used in with gtk_window_add_accel_group(),
* in order for those windows to support all the accelerators
* contained in this group.
*/
void
gtk_menu_set_accel_group (GtkMenu *menu,
GtkAccelGroup *accel_group)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->accel_group != accel_group)
{
if (priv->accel_group)
g_object_unref (priv->accel_group);
priv->accel_group = accel_group;
if (priv->accel_group)
g_object_ref (priv->accel_group);
_gtk_menu_refresh_accel_paths (menu, TRUE);
}
}
/**
* gtk_menu_get_accel_group:
* @menu: a #GtkMenu
*
* Gets the #GtkAccelGroup which holds global accelerators for the
* menu. See gtk_menu_set_accel_group().
*
* Returns: (transfer none): the #GtkAccelGroup associated with the menu
*/
GtkAccelGroup*
gtk_menu_get_accel_group (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->priv->accel_group;
}
static gboolean
gtk_menu_real_can_activate_accel (GtkWidget *widget,
guint signal_id)
{
/* Menu items chain here to figure whether they can activate their
* accelerators. Unlike ordinary widgets, menus allow accel
* activation even if invisible since that's the usual case for
* submenus/popup-menus. however, the state of the attach widget
* affects the "activeness" of the menu.
*/
GtkWidget *awidget = gtk_menu_get_attach_widget (GTK_MENU (widget));
if (awidget)
return gtk_widget_can_activate_accel (awidget, signal_id);
else
return gtk_widget_is_sensitive (widget);
}
/**
* gtk_menu_set_accel_path:
* @menu: a valid #GtkMenu
* @accel_path: (allow-none): a valid accelerator path
*
* Sets an accelerator path for this menu from which accelerator paths
* for its immediate children, its menu items, can be constructed.
* The main purpose of this function is to spare the programmer the
* inconvenience of having to call gtk_menu_item_set_accel_path() on
* each menu item that should support runtime user changable accelerators.
* Instead, by just calling gtk_menu_set_accel_path() on their parent,
* each menu item of this menu, that contains a label describing its
* purpose, automatically gets an accel path assigned.
*
* For example, a menu containing menu items “New” and “Exit”, will, after
* `gtk_menu_set_accel_path (menu, "<Gnumeric-Sheet>/File");` has been
* called, assign its items the accel paths: `"<Gnumeric-Sheet>/File/New"`
* and `"<Gnumeric-Sheet>/File/Exit"`.
*
* Assigning accel paths to menu items then enables the user to change
* their accelerators at runtime. More details about accelerator paths
* and their default setups can be found at gtk_accel_map_add_entry().
*
* Note that @accel_path string will be stored in a #GQuark. Therefore,
* if you pass a static string, you can save some memory by interning
* it first with g_intern_static_string().
*/
void
gtk_menu_set_accel_path (GtkMenu *menu,
const gchar *accel_path)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (accel_path)
g_return_if_fail (accel_path[0] == '<' && strchr (accel_path, '/')); /* simplistic check */
/* FIXME: accel_path should be defined as const gchar* */
priv->accel_path = (gchar*)g_intern_string (accel_path);
if (priv->accel_path)
_gtk_menu_refresh_accel_paths (menu, FALSE);
}
/**
* gtk_menu_get_accel_path:
* @menu: a valid #GtkMenu
*
* Retrieves the accelerator path set on the menu.
*
* Returns: the accelerator path set on the menu.
*
* Since: 2.14
*/
const gchar*
gtk_menu_get_accel_path (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->priv->accel_path;
}
typedef struct {
GtkMenu *menu;
gboolean group_changed;
} AccelPropagation;
static void
refresh_accel_paths_foreach (GtkWidget *widget,
gpointer data)
{
GtkMenuPrivate *priv;
AccelPropagation *prop = data;
if (GTK_IS_MENU_ITEM (widget)) /* should always be true */
{
priv = prop->menu->priv;
_gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget),
priv->accel_path,
priv->accel_group,
prop->group_changed);
}
}
static void
_gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->accel_path && priv->accel_group)
{
AccelPropagation prop;
prop.menu = menu;
prop.group_changed = group_changed;
gtk_container_foreach (GTK_CONTAINER (menu),
refresh_accel_paths_foreach,
&prop);
}
}
/**
* gtk_menu_reposition:
* @menu: a #GtkMenu
*
* Repositions the menu according to its position function.
*/
void
gtk_menu_reposition (GtkMenu *menu)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (gtk_widget_is_drawable (GTK_WIDGET (menu)))
gtk_menu_position (menu, FALSE);
}
/**
* gtk_menu_reorder_child:
* @menu: a #GtkMenu
* @child: the #GtkMenuItem to move
* @position: the new position to place @child.
* Positions are numbered from 0 to n - 1
*
* Moves @child to a new @position in the list of @menu
* children.
*/
void
gtk_menu_reorder_child (GtkMenu *menu,
GtkWidget *child,
gint position)
{
GtkMenuShell *menu_shell;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_MENU_ITEM (child));
menu_shell = GTK_MENU_SHELL (menu);
if (g_list_find (menu_shell->priv->children, child))
{
menu_shell->priv->children = g_list_remove (menu_shell->priv->children, child);
menu_shell->priv->children = g_list_insert (menu_shell->priv->children, child, position);
menu_queue_resize (menu);
}
}
static void
gtk_menu_realize (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
GtkAllocation allocation;
GtkBorder arrow_border;
GTK_WIDGET_CLASS (gtk_menu_parent_class)->realize (widget);
gtk_widget_get_allocation (widget, &allocation);
get_arrows_border (menu, &arrow_border);
if (GTK_MENU_SHELL (widget)->priv->active_menu_item)
gtk_menu_scroll_item_visible (GTK_MENU_SHELL (widget),
GTK_MENU_SHELL (widget)->priv->active_menu_item);
}
static gboolean
gtk_menu_focus (GtkWidget *widget,
GtkDirectionType direction)
{
/* A menu or its menu items cannot have focus */
return FALSE;
}
/* See notes in gtk_menu_popup() for information
* about the “grab transfer window”
*/
static GdkWindow *
menu_grab_transfer_window_get (GtkMenu *menu)
{
GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
if (!window)
{
window = gdk_window_new_temp (gtk_widget_get_display (GTK_WIDGET (menu)));
gtk_widget_register_window (GTK_WIDGET (menu), window);
gdk_window_show (window);
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-transfer-window"), window);
}
return window;
}
static void
menu_grab_transfer_window_destroy (GtkMenu *menu)
{
GdkWindow *window = g_object_get_data (G_OBJECT (menu), "gtk-menu-transfer-window");
if (window)
{
GdkWindow *widget_window;
gtk_widget_unregister_window (GTK_WIDGET (menu), window);
gdk_window_destroy (window);
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-transfer-window"), NULL);
widget_window = gtk_widget_get_window (GTK_WIDGET (menu));
g_object_set_data (G_OBJECT (widget_window), I_("gdk-attached-grab-window"), window);
}
}
static void
gtk_menu_unrealize (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
menu_grab_transfer_window_destroy (menu);
GTK_WIDGET_CLASS (gtk_menu_parent_class)->unrealize (widget);
}
static gint
calculate_line_heights (GtkMenu *menu,
gint for_width,
guint **ret_min_heights,
guint **ret_nat_heights)
{
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
GtkWidget *child, *widget;
GList *children;
guint n_columns;
gint n_heights;
guint *min_heights;
guint *nat_heights;
gint avail_width;
priv = menu->priv;
widget = GTK_WIDGET (menu);
menu_shell = GTK_MENU_SHELL (widget);
min_heights = g_new0 (guint, gtk_menu_get_n_rows (menu));
nat_heights = g_new0 (guint, gtk_menu_get_n_rows (menu));
n_heights = gtk_menu_get_n_rows (menu);
n_columns = gtk_menu_get_n_columns (menu);
avail_width = for_width - (2 * priv->toggle_size + priv->accel_size) * n_columns;
for (children = menu_shell->priv->children; children; children = children->next)
{
gint part;
gint toggle_size;
gint l, r, t, b;
gint child_min, child_nat;
child = children->data;
if (!gtk_widget_get_visible (child))
continue;
get_effective_child_attach (child, &l, &r, &t, &b);
part = avail_width / (r - l);
gtk_widget_measure (child, GTK_ORIENTATION_VERTICAL,
part,
&child_min, &child_nat,
NULL, NULL);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size);
part = MAX (child_min, toggle_size) / (b - t);
min_heights[t] = MAX (min_heights[t], part);
part = MAX (child_nat, toggle_size) / (b - t);
nat_heights[t] = MAX (nat_heights[t], part);
}
if (ret_min_heights)
*ret_min_heights = min_heights;
else
g_free (min_heights);
if (ret_nat_heights)
*ret_nat_heights = nat_heights;
else
g_free (nat_heights);
return n_heights;
}
static void
gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkMenu *menu;
GtkMenuPrivate *priv;
GtkMenuShell *menu_shell;
GtkWidget *child;
GtkAllocation arrow_allocation, child_allocation;
GtkAllocation clip = *allocation;
GList *children;
gint x, y, i;
gint width, height;
GtkBorder arrow_border;
g_return_if_fail (GTK_IS_MENU (widget));
g_return_if_fail (allocation != NULL);
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
priv = menu->priv;
g_free (priv->heights);
priv->heights_length = calculate_line_heights (menu,
allocation->width,
&priv->heights,
NULL);
/* refresh our cached height request */
priv->requested_height = 0;
for (i = 0; i < priv->heights_length; i++)
priv->requested_height += priv->heights[i];
x = allocation->x;
y = allocation->y;
width = allocation->width;
height = allocation->height;
if (menu_shell->priv->active)
gtk_menu_scroll_to (menu, priv->scroll_offset);
get_arrows_border (menu, &arrow_border);
arrow_allocation.x = x;
arrow_allocation.y = y;
arrow_allocation.width = width;
arrow_allocation.height = arrow_border.top;
if (priv->upper_arrow_visible)
gtk_widget_size_allocate (priv->top_arrow_widget, &arrow_allocation);
arrow_allocation.y = height - y - arrow_border.bottom;
arrow_allocation.height = arrow_border.bottom;
if (priv->lower_arrow_visible)
gtk_widget_size_allocate (priv->bottom_arrow_widget, &arrow_allocation);
width = MAX (1, width);
height = MAX (1, height);
if (menu_shell->priv->children)
{
gint base_width = width / gtk_menu_get_n_columns (menu);
children = menu_shell->priv->children;
while (children)
{
child = children->data;
children = children->next;
if (gtk_widget_get_visible (child))
{
gint l, r, t, b;
get_effective_child_attach (child, &l, &r, &t, &b);
if (gtk_widget_get_direction (GTK_WIDGET (menu)) == GTK_TEXT_DIR_RTL)
{
guint tmp;
tmp = gtk_menu_get_n_columns (menu) - l;
l = gtk_menu_get_n_columns (menu) - r;
r = tmp;
}
child_allocation.width = (r - l) * base_width;
child_allocation.height = 0;
child_allocation.x = l * base_width;
child_allocation.y = 0;
for (i = 0; i < b; i++)
{
if (i < t)
child_allocation.y += priv->heights[i];
else
child_allocation.height += priv->heights[i];
}
gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
priv->toggle_size);
gtk_widget_size_allocate (child, &child_allocation);
}
}
}
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_menu_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
int width, height;
gtk_widget_get_content_size (widget, &width, &height);
/* XXX The arrows *might* be missing here */
gtk_snapshot_push_clip (snapshot,
&GRAPHENE_RECT_INIT(0, 0, width, height), "MenuClip");
GTK_WIDGET_CLASS (gtk_menu_parent_class)->snapshot (widget, snapshot);
gtk_snapshot_pop (snapshot);
}
static void
gtk_menu_show (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
_gtk_menu_refresh_accel_paths (menu, FALSE);
GTK_WIDGET_CLASS (gtk_menu_parent_class)->show (widget);
}
static void gtk_menu_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuShell *menu_shell = GTK_MENU_SHELL (widget);
GtkMenuPrivate *priv = gtk_menu_get_instance_private (menu);
GtkWidget *child;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
GList *children;
guint max_toggle_size;
guint max_accel_width;
gint child_min, child_nat;
gint min_width, nat_width;
min_width = nat_width = 0;
max_toggle_size = 0;
max_accel_width = 0;
children = menu_shell->priv->children;
while (children)
{
gint part;
gint toggle_size;
gint l, r, t, b;
child = children->data;
children = children->next;
if (! gtk_widget_get_visible (child))
continue;
get_effective_child_attach (child, &l, &r, &t, &b);
/* It's important to size_request the child
* before doing the toggle size request, in
* case the toggle size request depends on the size
* request of a child of the child (e.g. for ImageMenuItem)
*/
gtk_widget_measure (child, GTK_ORIENTATION_HORIZONTAL,
-1, &child_min, &child_nat, NULL, NULL);
gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child), &toggle_size);
max_toggle_size = MAX (max_toggle_size, toggle_size);
max_accel_width = MAX (max_accel_width,
GTK_MENU_ITEM (child)->priv->accelerator_width);
part = child_min / (r - l);
min_width = MAX (min_width, part);
part = child_nat / (r - l);
nat_width = MAX (nat_width, part);
}
/* If the menu doesn't include any images or check items
* reserve the space so that all menus are consistent.
* We only do this for 'ordinary' menus, not for combobox
* menus or multi-column menus
*/
if (max_toggle_size == 0 &&
gtk_menu_get_n_columns (menu) == 1 &&
!priv->no_toggle_size)
{
GtkWidget *menu_item;
GtkWidget *indicator_widget;
gint indicator_width;
/* Create a GtkCheckMenuItem, to query indicator size */
menu_item = gtk_check_menu_item_new ();
indicator_widget = _gtk_check_menu_item_get_indicator_widget (GTK_CHECK_MENU_ITEM (menu_item));
gtk_widget_measure (indicator_widget,
GTK_ORIENTATION_HORIZONTAL,
-1,
&indicator_width, NULL,
NULL, NULL);
max_toggle_size = indicator_width;
gtk_widget_destroy (menu_item);
g_object_ref_sink (menu_item);
g_object_unref (menu_item);
}
min_width += 2 * max_toggle_size + max_accel_width;
min_width *= gtk_menu_get_n_columns (menu);
nat_width += 2 * max_toggle_size + max_accel_width;
nat_width *= gtk_menu_get_n_columns (menu);
priv->toggle_size = max_toggle_size;
priv->accel_size = max_accel_width;
*minimum = min_width;
*natural = nat_width;
}
else /* VERTICAL */
{
if (for_size < 0)
{
gint min_width, nat_width;
/* Menus are height-for-width only, just return the height
* for the minimum width
*/
GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
&min_width, &nat_width, NULL, NULL);
GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_VERTICAL, min_width,
minimum, natural,
minimum_baseline, natural_baseline);
}
else
{
GtkBorder arrow_border;
guint *min_heights, *nat_heights;
gint n_heights, i;
gint min_height, single_height, nat_height;
min_height = nat_height = 0;
single_height = 0;
n_heights =
calculate_line_heights (menu, for_size, &min_heights, &nat_heights);
for (i = 0; i < n_heights; i++)
{
min_height += min_heights[i];
single_height = MAX (single_height, min_heights[i]);
nat_height += nat_heights[i];
}
get_arrows_border (menu, &arrow_border);
single_height += arrow_border.top + arrow_border.bottom;
min_height = MIN (min_height, single_height);
if (priv->have_position)
{
GdkDisplay *display;
GdkMonitor *monitor;
GdkRectangle workarea;
GtkBorder border;
display = gtk_widget_get_display (priv->toplevel);
monitor = gdk_display_get_monitor (display, priv->monitor_num);
gdk_monitor_get_workarea (monitor, &workarea);
if (priv->position_y + min_height > workarea.y + workarea.height)
min_height = workarea.y + workarea.height - priv->position_y;
if (priv->position_y + nat_height > workarea.y + workarea.height)
nat_height = workarea.y + workarea.height - priv->position_y;
_gtk_window_get_shadow_width (GTK_WINDOW (priv->toplevel), &border);
if (priv->position_y + border.top < workarea.y)
{
min_height -= workarea.y - (priv->position_y + border.top);
nat_height -= workarea.y - (priv->position_y + border.top);
}
}
*minimum = min_height;
*natural = nat_height;
g_free (min_heights);
g_free (nat_heights);
}
}
}
static gboolean
pointer_in_menu_window (GtkWidget *widget,
gdouble x_root,
gdouble y_root)
{
GtkMenu *menu = GTK_MENU (widget);
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
if (gtk_widget_get_mapped (priv->toplevel))
{
GtkMenuShell *menu_shell;
gint window_x, window_y;
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&window_x, &window_y);
gtk_widget_get_allocation (widget, &allocation);
if (x_root >= window_x && x_root < window_x + allocation.width &&
y_root >= window_y && y_root < window_y + allocation.height)
return TRUE;
menu_shell = GTK_MENU_SHELL (widget);
if (GTK_IS_MENU (menu_shell->priv->parent_menu_shell))
return pointer_in_menu_window (menu_shell->priv->parent_menu_shell,
x_root, y_root);
}
return FALSE;
}
static void
gtk_menu_pressed_cb (GtkGestureMultiPress *gesture,
int n_press,
double x,
double y,
gpointer user_data)
{
GtkMenu *menu = user_data;
GdkEventSequence *sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
const GdkEvent *event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
const GdkEventButton *button_event = (GdkEventButton *)event;
GdkDevice *source_device;
GtkWidget *event_widget;
source_device = gdk_event_get_source_device (event);
event_widget = gtk_get_event_widget ((GdkEvent *)event);
/* Don't pass down to menu shell if a non-menuitem part of the menu
* was clicked. The check for the event_widget being a GtkMenuShell
* works because we have the pointer grabbed on menu_shell->window
* with owner_events=TRUE, so all events that are either outside
* the menu or on its border are delivered relative to
* menu_shell->window.
*/
if (GTK_IS_MENU_SHELL (event_widget) &&
pointer_in_menu_window (GTK_WIDGET (menu), button_event->x_root, button_event->y_root))
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
return;
}
if (GTK_IS_MENU_ITEM (event_widget) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN &&
GTK_MENU_ITEM (event_widget)->priv->submenu != NULL &&
!gtk_widget_is_drawable (GTK_MENU_ITEM (event_widget)->priv->submenu))
menu->priv->ignore_button_release = TRUE;
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
}
static void
gtk_menu_released_cb (GtkGestureMultiPress *gesture,
int n_press,
double x,
double y,
gpointer user_data)
{
GtkMenu *menu = user_data;
GtkMenuPrivate *priv = menu->priv;
GdkEventSequence *sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
const GdkEvent *event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
const GdkEventButton *button_event = (GdkEventButton *)event;
if (priv->ignore_button_release)
{
priv->ignore_button_release = FALSE;
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
/* Don't pass down to menu shell if a non-menuitem part of the menu
* was clicked (see comment in button_press()).
*/
if (GTK_IS_MENU_SHELL (gtk_get_event_widget ((GdkEvent *) event)) &&
pointer_in_menu_window (GTK_WIDGET (menu), button_event->x_root, button_event->y_root))
{
/* Ugly: make sure menu_shell->button gets reset to 0 when we
* bail out early here so it is in a consistent state for the
* next button_press/button_release in GtkMenuShell.
* See bug #449371.
*/
if (GTK_MENU_SHELL (menu)->priv->active)
GTK_MENU_SHELL (menu)->priv->button = 0;
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
}
}
static gboolean
gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkMenu *menu;
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
menu = GTK_MENU (widget);
gtk_menu_stop_navigating_submenu (menu);
return GTK_WIDGET_CLASS (gtk_menu_parent_class)->key_press_event (widget, event);
}
static gboolean
check_threshold (GtkWidget *widget,
gint start_x,
gint start_y,
gint x,
gint y)
{
#define THRESHOLD 8
return
ABS (start_x - x) > THRESHOLD ||
ABS (start_y - y) > THRESHOLD;
}
static gboolean
definitely_within_item (GtkWidget *widget,
gint x,
gint y)
{
GtkAllocation allocation;
int w, h;
gtk_widget_get_allocation (widget, &allocation);
w = allocation.width;
h = allocation.height;
return
check_threshold (widget, 0, 0, x, y) &&
check_threshold (widget, w - 1, 0, x, y) &&
check_threshold (widget, w - 1, h - 1, x, y) &&
check_threshold (widget, 0, h - 1, x, y);
}
static gboolean
gtk_menu_has_navigation_triangle (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
return priv->navigation_height && priv->navigation_width;
}
static gboolean
gtk_menu_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkWidget *menu_item;
GtkMenu *menu;
GtkMenuShell *menu_shell;
GtkWidget *parent;
GdkDevice *source_device;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
if (GTK_IS_MENU (widget) &&
gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
{
GtkMenuPrivate *priv = GTK_MENU(widget)->priv;
if (priv->ignore_button_release)
priv->ignore_button_release = FALSE;
gtk_menu_handle_scrolling (GTK_MENU (widget), event->x_root, event->y_root,
TRUE, TRUE);
}
/* We received the event for one of two reasons:
*
* a) We are the active menu, and did gtk_grab_add()
* b) The widget is a child of ours, and the event was propagated
*
* Since for computation of navigation regions, we want the menu which
* is the parent of the menu item, for a), we need to find that menu,
* which may be different from 'widget'.
*/
menu_item = gtk_get_event_widget ((GdkEvent*) event);
parent = gtk_widget_get_parent (menu_item);
if (!GTK_IS_MENU_ITEM (menu_item) ||
!GTK_IS_MENU (parent))
return FALSE;
menu_shell = GTK_MENU_SHELL (parent);
menu = GTK_MENU (menu_shell);
if (definitely_within_item (menu_item, event->x, event->y))
menu_shell->priv->activate_time = 0;
/* Check to see if we are within an active submenu's navigation region
*/
if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
return TRUE;
/* Make sure we pop down if we enter a non-selectable menu item, so we
* don't show a submenu when the cursor is outside the stay-up triangle.
*/
if (!_gtk_menu_item_is_selectable (menu_item))
{
/* We really want to deselect, but this gives the menushell code
* a chance to do some bookkeeping about the menuitem.
*/
gtk_menu_shell_select_item (menu_shell, menu_item);
return FALSE;
}
return FALSE;
}
static void
gtk_menu_scroll_by (GtkMenu *menu,
gint step)
{
GtkMenuPrivate *priv = menu->priv;
GtkBorder arrow_border;
GtkWidget *widget;
gint offset;
gint view_height;
widget = GTK_WIDGET (menu);
offset = priv->scroll_offset + step;
get_arrows_border (menu, &arrow_border);
/* Don't scroll over the top if we weren't before: */
if ((priv->scroll_offset >= 0) && (offset < 0))
offset = 0;
view_height = gdk_window_get_height (gtk_widget_get_window (widget));
if (priv->scroll_offset == 0 &&
view_height >= priv->requested_height)
return;
/* Don't scroll past the bottom if we weren't before: */
if (priv->scroll_offset > 0)
view_height -= arrow_border.top;
/* Since arrows are shown, reduce view height even more */
view_height -= arrow_border.bottom;
if ((priv->scroll_offset + view_height <= priv->requested_height) &&
(offset + view_height > priv->requested_height))
offset = priv->requested_height - view_height;
if (offset != priv->scroll_offset)
gtk_menu_scroll_to (menu, offset);
}
static gboolean
gtk_menu_scroll_timeout (gpointer data)
{
GtkMenu *menu;
menu = GTK_MENU (data);
gtk_menu_scroll_by (menu, menu->priv->scroll_step);
return TRUE;
}
static gboolean
gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
GtkMenu *menu = GTK_MENU (widget);
if (gdk_event_get_pointer_emulated ((GdkEvent *) event))
return GDK_EVENT_PROPAGATE;
switch (event->direction)
{
case GDK_SCROLL_DOWN:
gtk_menu_scroll_by (menu, MENU_SCROLL_STEP2);
break;
case GDK_SCROLL_UP:
gtk_menu_scroll_by (menu, - MENU_SCROLL_STEP2);
break;
case GDK_SCROLL_SMOOTH:
gtk_menu_scroll_by (menu, event->delta_y * MENU_SCROLL_STEP2);
break;
default:
return GDK_EVENT_PROPAGATE;
break;
}
return GDK_EVENT_STOP;
}
static void
get_arrows_sensitive_area (GtkMenu *menu,
GdkRectangle *upper,
GdkRectangle *lower)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget = GTK_WIDGET (menu);
GdkWindow *window;
gint width, height;
gint win_x, win_y;
gint top_arrow_height, bottom_arrow_height;
gtk_widget_measure (priv->top_arrow_widget,
GTK_ORIENTATION_VERTICAL,
-1,
&top_arrow_height, NULL,
NULL, NULL);
gtk_widget_measure (priv->bottom_arrow_widget,
GTK_ORIENTATION_VERTICAL,
-1,
&bottom_arrow_height, NULL,
NULL, NULL);
window = gtk_widget_get_window (widget);
width = gdk_window_get_width (window);
height = gdk_window_get_height (window);
gdk_window_get_position (window, &win_x, &win_y);
if (upper)
{
upper->x = win_x;
upper->y = win_y;
upper->width = width;
upper->height = top_arrow_height;
}
if (lower)
{
lower->x = win_x;
lower->y = win_y + height - bottom_arrow_height;
lower->width = width;
lower->height = bottom_arrow_height;
}
}
static void
gtk_menu_handle_scrolling (GtkMenu *menu,
gint x,
gint y,
gboolean enter,
gboolean motion)
{
GtkMenuPrivate *priv = menu->priv;
GtkMenuShell *menu_shell;
GdkRectangle rect;
gboolean in_arrow;
gboolean scroll_fast = FALSE;
gint top_x, top_y;
menu_shell = GTK_MENU_SHELL (menu);
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&top_x, &top_y);
x -= top_x;
y -= top_y;
/* upper arrow handling */
get_arrows_sensitive_area (menu, &rect, NULL);
in_arrow = FALSE;
if (priv->upper_arrow_visible &&
(x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
}
if ((priv->upper_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
gboolean arrow_pressed = FALSE;
if (priv->upper_arrow_visible)
{
scroll_fast = (y < rect.y + MENU_SCROLL_FAST_ZONE);
if (enter && in_arrow &&
(!priv->upper_arrow_prelight ||
priv->scroll_fast != scroll_fast))
{
priv->upper_arrow_prelight = TRUE;
priv->scroll_fast = scroll_fast;
/* Deselect the active item so that
* any submenus are popped down
*/
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
priv->scroll_step = scroll_fast
? -MENU_SCROLL_STEP2
: -MENU_SCROLL_STEP1;
priv->scroll_timeout =
gdk_threads_add_timeout (scroll_fast
? MENU_SCROLL_TIMEOUT2
: MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout, menu);
g_source_set_name_by_id (priv->scroll_timeout, "[gtk+] gtk_menu_scroll_timeout");
}
else if (!enter && !in_arrow && priv->upper_arrow_prelight)
{
gtk_menu_stop_scrolling (menu);
}
}
/* check if the button isn't insensitive before
* changing it to something else.
*/
if ((priv->upper_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
GtkStateFlags arrow_state = 0;
if (arrow_pressed)
arrow_state |= GTK_STATE_FLAG_ACTIVE;
if (priv->upper_arrow_prelight)
arrow_state |= GTK_STATE_FLAG_PRELIGHT;
if (arrow_state != priv->upper_arrow_state)
{
priv->upper_arrow_state = arrow_state;
gtk_widget_set_state_flags (priv->top_arrow_widget, arrow_state, TRUE);
}
}
}
/* lower arrow handling */
get_arrows_sensitive_area (menu, NULL, &rect);
in_arrow = FALSE;
if (priv->lower_arrow_visible &&
(x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
}
if ((priv->lower_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
gboolean arrow_pressed = FALSE;
if (priv->lower_arrow_visible)
{
scroll_fast = (y > rect.y + rect.height - MENU_SCROLL_FAST_ZONE);
if (enter && in_arrow &&
(!priv->lower_arrow_prelight ||
priv->scroll_fast != scroll_fast))
{
priv->lower_arrow_prelight = TRUE;
priv->scroll_fast = scroll_fast;
/* Deselect the active item so that
* any submenus are popped down
*/
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
priv->scroll_step = scroll_fast
? MENU_SCROLL_STEP2
: MENU_SCROLL_STEP1;
priv->scroll_timeout =
gdk_threads_add_timeout (scroll_fast
? MENU_SCROLL_TIMEOUT2
: MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout, menu);
g_source_set_name_by_id (priv->scroll_timeout, "[gtk+] gtk_menu_scroll_timeout");
}
else if (!enter && !in_arrow && priv->lower_arrow_prelight)
{
gtk_menu_stop_scrolling (menu);
}
}
/* check if the button isn't insensitive before
* changing it to something else.
*/
if ((priv->lower_arrow_state & GTK_STATE_FLAG_INSENSITIVE) == 0)
{
GtkStateFlags arrow_state = 0;
if (arrow_pressed)
arrow_state |= GTK_STATE_FLAG_ACTIVE;
if (priv->lower_arrow_prelight)
arrow_state |= GTK_STATE_FLAG_PRELIGHT;
if (arrow_state != priv->lower_arrow_state)
{
priv->lower_arrow_state = arrow_state;
gtk_widget_set_state_flags (priv->bottom_arrow_widget, arrow_state, TRUE);
}
}
}
}
static gboolean
gtk_menu_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GdkDevice *source_device;
if (event->mode == GDK_CROSSING_GTK_GRAB ||
event->mode == GDK_CROSSING_GTK_UNGRAB ||
event->mode == GDK_CROSSING_STATE_CHANGED)
return TRUE;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
if (gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
{
GtkMenuShell *menu_shell = GTK_MENU_SHELL (widget);
if (!menu_shell->priv->ignore_enter)
gtk_menu_handle_scrolling (GTK_MENU (widget),
event->x_root, event->y_root, TRUE, TRUE);
}
return GDK_EVENT_STOP;
}
static gboolean
gtk_menu_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkMenu *menu;
GdkDevice *source_device;
if (event->mode == GDK_CROSSING_GTK_GRAB ||
event->mode == GDK_CROSSING_GTK_UNGRAB ||
event->mode == GDK_CROSSING_STATE_CHANGED)
return TRUE;
menu = GTK_MENU (widget);
if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
return TRUE;
source_device = gdk_event_get_source_device ((GdkEvent *) event);
if (gdk_device_get_source (source_device) != GDK_SOURCE_TOUCHSCREEN)
gtk_menu_handle_scrolling (menu, event->x_root, event->y_root, FALSE, TRUE);
return GDK_EVENT_STOP;
}
static gboolean
pointer_on_menu_widget (GtkMenu *menu,
gdouble x_root,
gdouble y_root)
{
GtkMenuPrivate *priv = menu->priv;
GtkAllocation allocation;
gint window_x, window_y;
gtk_widget_get_allocation (GTK_WIDGET (menu), &allocation);
gdk_window_get_position (gtk_widget_get_window (priv->toplevel),
&window_x, &window_y);
if (x_root >= window_x && x_root < window_x + allocation.width &&
y_root >= window_y && y_root < window_y + allocation.height)
return TRUE;
return FALSE;
}
static gboolean
gtk_menu_captured_event (GtkWidget *widget,
GdkEvent *event)
{
GdkDevice *source_device;
gboolean retval = FALSE;
GtkMenuPrivate *priv;
GtkMenu *menu;
gdouble x_root, y_root;
guint button;
GdkModifierType state;
menu = GTK_MENU (widget);
priv = menu->priv;
if (!priv->upper_arrow_visible && !priv->lower_arrow_visible && priv->drag_start_y < 0)
return retval;
source_device = gdk_event_get_source_device (event);
gdk_event_get_root_coords (event, &x_root, &y_root);
switch (event->type)
{
case GDK_TOUCH_BEGIN:
case GDK_BUTTON_PRESS:
if ((!gdk_event_get_button (event, &button) || button == 1) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN &&
pointer_on_menu_widget (menu, x_root, y_root))
{
priv->drag_start_y = event->button.y_root;
priv->initial_drag_offset = priv->scroll_offset;
priv->drag_scroll_started = FALSE;
}
else
priv->drag_start_y = -1;
priv->drag_already_pressed = TRUE;
break;
case GDK_TOUCH_END:
case GDK_BUTTON_RELEASE:
if (priv->drag_scroll_started)
{
priv->drag_scroll_started = FALSE;
priv->drag_start_y = -1;
priv->drag_already_pressed = FALSE;
retval = TRUE;
}
break;
case GDK_TOUCH_UPDATE:
case GDK_MOTION_NOTIFY:
if ((!gdk_event_get_state (event, &state) || (state & GDK_BUTTON1_MASK) != 0) &&
gdk_device_get_source (source_device) == GDK_SOURCE_TOUCHSCREEN)
{
if (!priv->drag_already_pressed)
{
if (pointer_on_menu_widget (menu, x_root, y_root))
{
priv->drag_start_y = y_root;
priv->initial_drag_offset = priv->scroll_offset;
priv->drag_scroll_started = FALSE;
}
else
priv->drag_start_y = -1;
priv->drag_already_pressed = TRUE;
}
if (priv->drag_start_y < 0 && !priv->drag_scroll_started)
break;
if (priv->drag_scroll_started)
{
gint offset, view_height;
GtkBorder arrow_border;
gdouble y_diff;
y_diff = y_root - priv->drag_start_y;
offset = priv->initial_drag_offset - y_diff;
view_height = gdk_window_get_height (gtk_widget_get_window (widget));
get_arrows_border (menu, &arrow_border);
if (priv->upper_arrow_visible)
view_height -= arrow_border.top;
if (priv->lower_arrow_visible)
view_height -= arrow_border.bottom;
offset = CLAMP (offset,
MIN (priv->scroll_offset, 0),
MAX (priv->scroll_offset, priv->requested_height - view_height));
gtk_menu_scroll_to (menu, offset);
retval = TRUE;
}
else if (gtk_drag_check_threshold (widget,
0, priv->drag_start_y,
0, y_root))
{
priv->drag_scroll_started = TRUE;
gtk_menu_shell_deselect (GTK_MENU_SHELL (menu));
retval = TRUE;
}
}
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
if (priv->drag_scroll_started)
retval = TRUE;
break;
default:
break;
}
return retval;
}
static void
gtk_menu_stop_navigating_submenu (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
priv->navigation_x = 0;
priv->navigation_y = 0;
priv->navigation_width = 0;
priv->navigation_height = 0;
if (priv->navigation_timeout)
{
g_source_remove (priv->navigation_timeout);
priv->navigation_timeout = 0;
}
}
static gboolean
gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y)
{
GtkMenuPrivate *priv = menu->priv;
gint width, height;
if (!gtk_menu_has_navigation_triangle (menu))
return FALSE;
width = priv->navigation_width;
height = priv->navigation_height;
/* Check if x/y are in the triangle spanned by the navigation parameters */
/* 1) Move the coordinates so the triangle starts at 0,0 */
event_x -= priv->navigation_x;
event_y -= priv->navigation_y;
/* 2) Ensure both legs move along the positive axis */
if (width < 0)
{
event_x = -event_x;
width = -width;
}
if (height < 0)
{
event_y = -event_y;
height = -height;
}
/* 3) Check that the given coordinate is inside the triangle. The formula
* is a transformed form of this formula: x/w + y/h <= 1
*/
if (event_x >= 0 && event_y >= 0 &&
event_x * height + event_y * width <= width * height)
{
return TRUE;
}
else
{
gtk_menu_stop_navigating_submenu (menu);
return FALSE;
}
}
static void
gtk_menu_deactivate (GtkMenuShell *menu_shell)
{
GtkWidget *parent;
g_return_if_fail (GTK_IS_MENU (menu_shell));
parent = menu_shell->priv->parent_menu_shell;
menu_shell->priv->activate_time = 0;
gtk_menu_popdown (GTK_MENU (menu_shell));
if (parent)
gtk_menu_shell_deactivate (GTK_MENU_SHELL (parent));
}
static void
gtk_menu_position_legacy (GtkMenu *menu,
gboolean set_scroll_offset)
{
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget;
GtkRequisition requisition;
gint x, y;
gint scroll_offset;
GdkDisplay *display;
GdkMonitor *monitor;
GdkRectangle workarea;
gint monitor_num;
GdkDevice *pointer;
GtkBorder border;
gint i;
widget = GTK_WIDGET (menu);
display = gtk_widget_get_display (widget);
pointer = _gtk_menu_shell_get_grab_device (GTK_MENU_SHELL (menu));
gdk_device_get_position (pointer, NULL, &x, &y);
/* Realize so we have the proper width and height to figure out
* the right place to popup the menu.
*/
gtk_widget_realize (priv->toplevel);
_gtk_window_get_shadow_width (GTK_WINDOW (priv->toplevel), &border);
requisition.width = gtk_widget_get_allocated_width (widget);
requisition.height = gtk_widget_get_allocated_height (widget);
monitor = gdk_display_get_monitor_at_point (display, x, y);
monitor_num = 0;
for (i = 0; ; i++)
{
GdkMonitor *m = gdk_display_get_monitor (display, i);
if (m == monitor)
{
monitor_num = i;
break;
}
if (m == NULL)
break;
}
priv->monitor_num = monitor_num;
priv->initially_pushed_in = FALSE;
/* Set the type hint here to allow custom position functions
* to set a different hint
*/
if (!gtk_widget_get_visible (priv->toplevel))
gtk_window_set_type_hint (GTK_WINDOW (priv->toplevel), GDK_WINDOW_TYPE_HINT_POPUP_MENU);
if (priv->position_func)
{
(* priv->position_func) (menu, &x, &y, &priv->initially_pushed_in,
priv->position_func_data);
if (priv->monitor_num < 0)
priv->monitor_num = monitor_num;
monitor = gdk_display_get_monitor (display, priv->monitor_num);
gdk_monitor_get_workarea (monitor, &workarea);
}
else
{
gint space_left, space_right, space_above, space_below;
gint needed_width;
gint needed_height;
gboolean rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
/* The placement of popup menus horizontally works like this (with
* RTL in parentheses)
*
* - If there is enough room to the right (left) of the mouse cursor,
* position the menu there.
*
* - Otherwise, if if there is enough room to the left (right) of the
* mouse cursor, position the menu there.
*
* - Otherwise if the menu is smaller than the monitor, position it
* on the side of the mouse cursor that has the most space available
*
* - Otherwise (if there is simply not enough room for the menu on the
* monitor), position it as far left (right) as possible.
*
* Positioning in the vertical direction is similar: first try below
* mouse cursor, then above.
*/
monitor = gdk_display_get_monitor (display, priv->monitor_num);
gdk_monitor_get_workarea (monitor, &workarea);
space_left = x - workarea.x;
space_right = workarea.x + workarea.width - x - 1;
space_above = y - workarea.y;
space_below = workarea.y + workarea.height - y - 1;
/* Position horizontally. */
/* the amount of space we need to position the menu.
* Note the menu is offset "thickness" pixels
*/
needed_width = requisition.width;
if (needed_width <= space_left ||
needed_width <= space_right)
{
if ((rtl && needed_width <= space_left) ||
(!rtl && needed_width > space_right))
{
/* position left */
x = x - requisition.width + 1;
}
else
{
/* position right */
}
/* x is clamped on-screen further down */
}
else if (requisition.width <= workarea.width)
{
/* the menu is too big to fit on either side of the mouse
* cursor, but smaller than the monitor. Position it on
* the side that has the most space
*/
if (space_left > space_right)
{
/* left justify */
x = workarea.x;
}
else
{
/* right justify */
x = workarea.x + workarea.width - requisition.width;
}
}
else /* menu is simply too big for the monitor */
{
if (rtl)
{
/* right justify */
x = workarea.x + workarea.width - requisition.width;
}
else
{
/* left justify */
x = workarea.x;
}
}
/* Position vertically.
* The algorithm is the same as above, but simpler
* because we don't have to take RTL into account.
*/
needed_height = requisition.height;
if (needed_height <= space_above ||
needed_height <= space_below)
{
if (needed_height > space_below)
y = y - requisition.height + 1;
y = CLAMP (y, workarea.y,
workarea.y + workarea.height - requisition.height);
}
else if (needed_height > space_below && needed_height > space_above)
{
if (space_below >= space_above)
y = workarea.y + workarea.height - requisition.height;
else
y = workarea.y;
}
else
{
y = workarea.y;
}
}
scroll_offset = 0;
if (y + requisition.height > workarea.y + workarea.height)
{
if (priv->initially_pushed_in)
scroll_offset += (workarea.y + workarea.height) - requisition.height - y;
y = (workarea.y + workarea.height) - requisition.height;
}
if (y < workarea.y)
{
if (priv->initially_pushed_in)
scroll_offset += workarea.y - y;
y = workarea.y;
}
x = CLAMP (x, workarea.x, MAX (workarea.x, workarea.x + workarea.width - requisition.width));
x -= border.left;
y -= border.top;
if (GTK_MENU_SHELL (menu)->priv->active)
{
priv->have_position = TRUE;
priv->position_x = x;
priv->position_y = y;
}
if (scroll_offset != 0)
{
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
scroll_offset += arrow_border.top;
}
gtk_window_move (GTK_WINDOW (priv->toplevel), x, y);
if (set_scroll_offset)
priv->scroll_offset = scroll_offset;
}
static GdkGravity
get_horizontally_flipped_anchor (GdkGravity anchor)
{
switch (anchor)
{
case GDK_GRAVITY_STATIC:
case GDK_GRAVITY_NORTH_WEST:
return GDK_GRAVITY_NORTH_EAST;
case GDK_GRAVITY_NORTH:
return GDK_GRAVITY_NORTH;
case GDK_GRAVITY_NORTH_EAST:
return GDK_GRAVITY_NORTH_WEST;
case GDK_GRAVITY_WEST:
return GDK_GRAVITY_EAST;
case GDK_GRAVITY_CENTER:
return GDK_GRAVITY_CENTER;
case GDK_GRAVITY_EAST:
return GDK_GRAVITY_WEST;
case GDK_GRAVITY_SOUTH_WEST:
return GDK_GRAVITY_SOUTH_EAST;
case GDK_GRAVITY_SOUTH:
return GDK_GRAVITY_SOUTH;
case GDK_GRAVITY_SOUTH_EAST:
return GDK_GRAVITY_SOUTH_WEST;
}
g_warning ("unknown GdkGravity: %d", anchor);
return anchor;
}
static void
gtk_menu_position (GtkMenu *menu,
gboolean set_scroll_offset)
{
GtkMenuPrivate *priv = menu->priv;
GdkWindow *rect_window = NULL;
GdkRectangle rect;
GtkTextDirection text_direction = GTK_TEXT_DIR_NONE;
GdkGravity rect_anchor;
GdkGravity menu_anchor;
GdkAnchorHints anchor_hints;
gint rect_anchor_dx, rect_anchor_dy;
GdkWindow *toplevel;
gboolean emulated_move_to_rect = FALSE;
rect_anchor = priv->rect_anchor;
menu_anchor = priv->menu_anchor;
anchor_hints = priv->anchor_hints;
rect_anchor_dx = priv->rect_anchor_dx;
rect_anchor_dy = priv->rect_anchor_dy;
if (priv->rect_window)
{
rect_window = priv->rect_window;
rect = priv->rect;
}
else if (priv->widget)
{
rect_window = gtk_widget_get_window (priv->widget);
gtk_widget_get_window_allocation (priv->widget, &rect);
text_direction = gtk_widget_get_direction (priv->widget);
}
else if (!priv->position_func)
{
GtkWidget *attach_widget;
GdkDevice *grab_device;
/*
* One of the legacy gtk_menu_popup*() functions were used to popup but
* without a custom positioning function, so make an attempt to let the
* backend do the position constraining when required conditions are met.
*/
grab_device = _gtk_menu_shell_get_grab_device (GTK_MENU_SHELL (menu));
attach_widget = gtk_menu_get_attach_widget (menu);
if (grab_device && attach_widget)
{
rect = (GdkRectangle) { 0, 0, 1, 1 };
rect_window = gtk_widget_get_window (attach_widget);
gdk_window_get_device_position (rect_window, grab_device,
&rect.x, &rect.y, NULL);
text_direction = gtk_widget_get_direction (attach_widget);
rect_anchor = GDK_GRAVITY_SOUTH_EAST;
menu_anchor = GDK_GRAVITY_NORTH_WEST;
anchor_hints = GDK_ANCHOR_FLIP | GDK_ANCHOR_SLIDE | GDK_ANCHOR_RESIZE;
rect_anchor_dx = 0;
rect_anchor_dy = 0;
emulated_move_to_rect = TRUE;
}
}
if (!rect_window)
{
gtk_menu_position_legacy (menu, set_scroll_offset);
return;
}
/* Realize so we have the proper width and height to figure out
* the right place to popup the menu.
*/
gtk_widget_realize (priv->toplevel);
if (!gtk_widget_get_visible (priv->toplevel))
gtk_window_set_type_hint (GTK_WINDOW (priv->toplevel), priv->menu_type_hint);
if (text_direction == GTK_TEXT_DIR_NONE)
text_direction = gtk_widget_get_direction (GTK_WIDGET (menu));
if (text_direction == GTK_TEXT_DIR_RTL)
{
rect_anchor = get_horizontally_flipped_anchor (rect_anchor);
menu_anchor = get_horizontally_flipped_anchor (menu_anchor);
}
toplevel = gtk_widget_get_window (priv->toplevel);
gdk_window_set_transient_for (toplevel, rect_window);
g_signal_handlers_disconnect_by_func (toplevel, moved_to_rect_cb, menu);
if (!emulated_move_to_rect)
g_signal_connect (toplevel, "moved-to-rect", G_CALLBACK (moved_to_rect_cb),
menu);
gdk_window_move_to_rect (toplevel,
&rect,
rect_anchor,
menu_anchor,
anchor_hints,
rect_anchor_dx,
rect_anchor_dy);
}
static void
gtk_menu_remove_scroll_timeout (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
if (priv->scroll_timeout)
{
g_source_remove (priv->scroll_timeout);
priv->scroll_timeout = 0;
}
}
static void
gtk_menu_stop_scrolling (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkCssNode *top_arrow_node, *bottom_arrow_node;
GtkStateFlags state;
gtk_menu_remove_scroll_timeout (menu);
priv->upper_arrow_prelight = FALSE;
priv->lower_arrow_prelight = FALSE;
top_arrow_node = gtk_widget_get_css_node (priv->top_arrow_widget);
state = gtk_css_node_get_state (top_arrow_node);
gtk_css_node_set_state (top_arrow_node, state & ~GTK_STATE_FLAG_PRELIGHT);
bottom_arrow_node = gtk_widget_get_css_node (priv->bottom_arrow_widget);
state = gtk_css_node_get_state (bottom_arrow_node);
gtk_css_node_set_state (bottom_arrow_node, state & ~GTK_STATE_FLAG_PRELIGHT);
}
static void
gtk_menu_scroll_to (GtkMenu *menu,
gint offset)
{
GtkMenuPrivate *priv = menu->priv;
GtkCssNode *top_arrow_node, *bottom_arrow_node;
top_arrow_node = gtk_widget_get_css_node (priv->top_arrow_widget);
gtk_css_node_set_visible (top_arrow_node, priv->upper_arrow_visible);
gtk_css_node_set_state (top_arrow_node, priv->upper_arrow_state);
bottom_arrow_node = gtk_widget_get_css_node (priv->bottom_arrow_widget);
gtk_css_node_set_visible (bottom_arrow_node, priv->lower_arrow_visible);
gtk_css_node_set_state (bottom_arrow_node, priv->lower_arrow_state);
priv->scroll_offset = offset;
}
static gboolean
compute_child_offset (GtkMenu *menu,
GtkWidget *menu_item,
gint *offset,
gint *height,
gboolean *is_last_child)
{
GtkMenuPrivate *priv = menu->priv;
gint item_top_attach;
gint item_bottom_attach;
gint child_offset = 0;
gint i;
get_effective_child_attach (menu_item, NULL, NULL,
&item_top_attach, &item_bottom_attach);
/* there is a possibility that we get called before _size_request,
* so check the height table for safety.
*/
if (!priv->heights || priv->heights_length < gtk_menu_get_n_rows (menu))
return FALSE;
/* when we have a row with only invisible children, its height will
* be zero, so there's no need to check WIDGET_VISIBLE here
*/
for (i = 0; i < item_top_attach; i++)
child_offset += priv->heights[i];
if (is_last_child)
*is_last_child = (item_bottom_attach == gtk_menu_get_n_rows (menu));
if (offset)
*offset = child_offset;
if (height)
*height = priv->heights[item_top_attach];
return TRUE;
}
static void
gtk_menu_scroll_item_visible (GtkMenuShell *menu_shell,
GtkWidget *menu_item)
{
GtkMenu *menu = GTK_MENU (menu_shell);
GtkMenuPrivate *priv = menu->priv;
GtkWidget *widget = GTK_WIDGET (menu_shell);
gint child_offset, child_height;
gint height;
gint y;
gint arrow_height;
gboolean last_child = 0;
/* We need to check if the selected item fully visible.
* If not we need to scroll the menu so that it becomes fully
* visible.
*/
if (compute_child_offset (menu, menu_item,
&child_offset, &child_height, &last_child))
{
y = priv->scroll_offset;
height = gdk_window_get_height (gtk_widget_get_window (widget));
if (child_offset < y)
{
/* Ignore the enter event we might get if the pointer
* is on the menu
*/
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, child_offset);
}
else
{
GtkBorder arrow_border;
arrow_height = 0;
get_arrows_border (menu, &arrow_border);
arrow_height = arrow_border.top + arrow_border.bottom;
if (child_offset + child_height > y + height - arrow_height)
{
arrow_height = arrow_border.bottom + arrow_border.top;
y = child_offset + child_height - height + arrow_height;
/* Ignore the enter event we might get if the pointer
* is on the menu
*/
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, y);
}
}
}
}
static void
gtk_menu_select_item (GtkMenuShell *menu_shell,
GtkWidget *menu_item)
{
GtkMenu *menu = GTK_MENU (menu_shell);
if (gtk_widget_get_realized (GTK_WIDGET (menu)))
gtk_menu_scroll_item_visible (menu_shell, menu_item);
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->select_item (menu_shell, menu_item);
}
/**
* gtk_menu_set_screen:
* @menu: a #GtkMenu
* @screen: (allow-none): a #GdkScreen, or %NULL if the screen should be
* determined by the widget the menu is attached to
*
* Sets the #GdkScreen on which the menu will be displayed.
*
* Since: 2.2
*/
void
gtk_menu_set_screen (GtkMenu *menu,
GdkScreen *screen)
{
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (screen == NULL || GDK_IS_SCREEN (screen));
g_object_set_data (G_OBJECT (menu), I_("gtk-menu-explicit-screen"), screen);
if (screen)
{
menu_change_screen (menu, screen);
}
else
{
GtkWidget *attach_widget = gtk_menu_get_attach_widget (menu);
if (attach_widget)
attach_widget_screen_changed (attach_widget, NULL, menu);
}
}
/**
* gtk_menu_attach:
* @menu: a #GtkMenu
* @child: a #GtkMenuItem
* @left_attach: The column number to attach the left side of the item to
* @right_attach: The column number to attach the right side of the item to
* @top_attach: The row number to attach the top of the item to
* @bottom_attach: The row number to attach the bottom of the item to
*
* Adds a new #GtkMenuItem to a (table) menu. The number of “cells” that
* an item will occupy is specified by @left_attach, @right_attach,
* @top_attach and @bottom_attach. These each represent the leftmost,
* rightmost, uppermost and lower column and row numbers of the table.
* (Columns and rows are indexed from zero).
*
* Note that this function is not related to gtk_menu_detach().
*
* Since: 2.4
*/
void
gtk_menu_attach (GtkMenu *menu,
GtkWidget *child,
guint left_attach,
guint right_attach,
guint top_attach,
guint bottom_attach)
{
GtkMenuShell *menu_shell;
GtkWidget *parent;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_MENU_ITEM (child));
parent = gtk_widget_get_parent (child);
g_return_if_fail (parent == NULL || parent == GTK_WIDGET (menu));
g_return_if_fail (left_attach < right_attach);
g_return_if_fail (top_attach < bottom_attach);
menu_shell = GTK_MENU_SHELL (menu);
if (!parent)
{
AttachInfo *ai = get_attach_info (child);
ai->left_attach = left_attach;
ai->right_attach = right_attach;
ai->top_attach = top_attach;
ai->bottom_attach = bottom_attach;
menu_shell->priv->children = g_list_append (menu_shell->priv->children, child);
gtk_widget_insert_before (child, GTK_WIDGET (menu), menu->priv->bottom_arrow_widget);
menu_queue_resize (menu);
}
else
{
gtk_container_child_set (GTK_CONTAINER (parent), child,
"left-attach", left_attach,
"right-attach", right_attach,
"top-attach", top_attach,
"bottom-attach", bottom_attach,
NULL);
}
}
static gint
gtk_menu_get_popup_delay (GtkMenuShell *menu_shell)
{
return MENU_POPUP_DELAY;
}
static GtkWidget *
find_child_containing (GtkMenuShell *menu_shell,
int left,
int right,
int top,
int bottom)
{
GList *list;
/* find a child which includes the area given by
* left, right, top, bottom.
*/
for (list = menu_shell->priv->children; list; list = list->next)
{
gint l, r, t, b;
if (!_gtk_menu_item_is_selectable (list->data))
continue;
get_effective_child_attach (list->data, &l, &r, &t, &b);
if (l <= left && right <= r && t <= top && bottom <= b)
return GTK_WIDGET (list->data);
}
return NULL;
}
static void
gtk_menu_move_current (GtkMenuShell *menu_shell,
GtkMenuDirectionType direction)
{
GtkMenu *menu = GTK_MENU (menu_shell);
gint i;
gint l, r, t, b;
GtkWidget *match = NULL;
if (gtk_widget_get_direction (GTK_WIDGET (menu_shell)) == GTK_TEXT_DIR_RTL)
{
switch (direction)
{
case GTK_MENU_DIR_CHILD:
direction = GTK_MENU_DIR_PARENT;
break;
case GTK_MENU_DIR_PARENT:
direction = GTK_MENU_DIR_CHILD;
break;
default: ;
}
}
/* use special table menu key bindings */
if (menu_shell->priv->active_menu_item && gtk_menu_get_n_columns (menu) > 1)
{
get_effective_child_attach (menu_shell->priv->active_menu_item, &l, &r, &t, &b);
if (direction == GTK_MENU_DIR_NEXT)
{
for (i = b; i < gtk_menu_get_n_rows (menu); i++)
{
match = find_child_containing (menu_shell, l, l + 1, i, i + 1);
if (match)
break;
}
if (!match)
{
/* wrap around */
for (i = 0; i < t; i++)
{
match = find_child_containing (menu_shell,
l, l + 1, i, i + 1);
if (match)
break;
}
}
}
else if (direction == GTK_MENU_DIR_PREV)
{
for (i = t; i > 0; i--)
{
match = find_child_containing (menu_shell,
l, l + 1, i - 1, i);
if (match)
break;
}
if (!match)
{
/* wrap around */
for (i = gtk_menu_get_n_rows (menu); i > b; i--)
{
match = find_child_containing (menu_shell,
l, l + 1, i - 1, i);
if (match)
break;
}
}
}
else if (direction == GTK_MENU_DIR_PARENT)
{
/* we go one left if possible */
if (l > 0)
match = find_child_containing (menu_shell,
l - 1, l, t, t + 1);
if (!match)
{
GtkWidget *parent = menu_shell->priv->parent_menu_shell;
if (!parent
|| g_list_length (GTK_MENU_SHELL (parent)->priv->children) <= 1)
match = menu_shell->priv->active_menu_item;
}
}
else if (direction == GTK_MENU_DIR_CHILD)
{
/* we go one right if possible */
if (r < gtk_menu_get_n_columns (menu))
match = find_child_containing (menu_shell, r, r + 1, t, t + 1);
if (!match)
{
GtkWidget *parent = menu_shell->priv->parent_menu_shell;
if (! GTK_MENU_ITEM (menu_shell->priv->active_menu_item)->priv->submenu &&
(!parent ||
g_list_length (GTK_MENU_SHELL (parent)->priv->children) <= 1))
match = menu_shell->priv->active_menu_item;
}
}
if (match)
{
gtk_menu_shell_select_item (menu_shell, match);
return;
}
}
GTK_MENU_SHELL_CLASS (gtk_menu_parent_class)->move_current (menu_shell, direction);
}
static gint
get_visible_size (GtkMenu *menu)
{
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (menu);
GtkBorder arrow_border;
gint menu_height;
gtk_widget_get_allocation (widget, &allocation);
menu_height = allocation.height;
get_arrows_border (menu, &arrow_border);
menu_height -= arrow_border.top;
menu_height -= arrow_border.bottom;
return menu_height;
}
/* Find the sensitive on-screen child containing @y, or if none,
* the nearest selectable onscreen child. (%NULL if none)
*/
static GtkWidget *
child_at (GtkMenu *menu,
gint y)
{
GtkMenuPrivate *priv = menu->priv;
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
GtkWidget *child = NULL;
gint child_offset = 0;
GList *children;
gint menu_height;
gint lower, upper; /* Onscreen bounds */
menu_height = get_visible_size (menu);
lower = priv->scroll_offset;
upper = priv->scroll_offset + menu_height;
for (children = menu_shell->priv->children; children; children = children->next)
{
if (gtk_widget_get_visible (children->data))
{
GtkRequisition child_requisition;
gtk_widget_get_preferred_size (children->data,
&child_requisition, NULL);
if (_gtk_menu_item_is_selectable (children->data) &&
child_offset >= lower &&
child_offset + child_requisition.height <= upper)
{
child = children->data;
if (child_offset + child_requisition.height > y)
return child;
}
child_offset += child_requisition.height;
}
}
return child;
}
static gint
get_menu_height (GtkMenu *menu)
{
GtkMenuPrivate *priv = menu->priv;
GtkBorder arrow_border;
gint height;
height = priv->requested_height;
get_arrows_border (menu, &arrow_border);
height -= arrow_border.top;
height -= arrow_border.bottom;
return height;
}
static void
gtk_menu_real_move_scroll (GtkMenu *menu,
GtkScrollType type)
{
GtkMenuPrivate *priv = menu->priv;
gint page_size = get_visible_size (menu);
gint end_position = get_menu_height (menu);
GtkMenuShell *menu_shell = GTK_MENU_SHELL (menu);
switch (type)
{
case GTK_SCROLL_PAGE_UP:
case GTK_SCROLL_PAGE_DOWN:
{
gint old_offset;
gint new_offset;
gint child_offset = 0;
gboolean old_upper_arrow_visible;
gint step;
if (type == GTK_SCROLL_PAGE_UP)
step = - page_size;
else
step = page_size;
if (menu_shell->priv->active_menu_item)
{
gint child_height;
if (compute_child_offset (menu, menu_shell->priv->active_menu_item,
&child_offset, &child_height, NULL))
child_offset += child_height / 2;
}
menu_shell->priv->ignore_enter = TRUE;
old_upper_arrow_visible = priv->upper_arrow_visible;
old_offset = priv->scroll_offset;
new_offset = priv->scroll_offset + step;
new_offset = CLAMP (new_offset, 0, end_position - page_size);
gtk_menu_scroll_to (menu, new_offset);
if (menu_shell->priv->active_menu_item)
{
GtkWidget *new_child;
gboolean new_upper_arrow_visible = priv->upper_arrow_visible;
GtkBorder arrow_border;
get_arrows_border (menu, &arrow_border);
if (priv->scroll_offset != old_offset)
step = priv->scroll_offset - old_offset;
step -= (new_upper_arrow_visible - old_upper_arrow_visible) * arrow_border.top;
new_child = child_at (menu, child_offset + step);
if (new_child)
gtk_menu_shell_select_item (menu_shell, new_child);
}
}
break;
case GTK_SCROLL_START:
/* Ignore the enter event we might get if the pointer is on the menu */
menu_shell->priv->ignore_enter = TRUE;
gtk_menu_shell_select_first (menu_shell, TRUE);
break;
case GTK_SCROLL_END:
/* Ignore the enter event we might get if the pointer is on the menu */
menu_shell->priv->ignore_enter = TRUE;
_gtk_menu_shell_select_last (menu_shell, TRUE);
break;
default:
break;
}
}
/**
* gtk_menu_set_monitor:
* @menu: a #GtkMenu
* @monitor_num: the number of the monitor on which the menu should
* be popped up
*
* Informs GTK+ on which monitor a menu should be popped up.
* See gdk_monitor_get_geometry().
*
* This function should be called from a #GtkMenuPositionFunc
* if the menu should not appear on the same monitor as the pointer.
* This information can’t be reliably inferred from the coordinates
* returned by a #GtkMenuPositionFunc, since, for very long menus,
* these coordinates may extend beyond the monitor boundaries or even
* the screen boundaries.
*
* Since: 2.4
*/
void
gtk_menu_set_monitor (GtkMenu *menu,
gint monitor_num)
{
GtkMenuPrivate *priv = menu->priv;
g_return_if_fail (GTK_IS_MENU (menu));
if (priv->monitor_num != monitor_num)
{
priv->monitor_num = monitor_num;
g_object_notify (G_OBJECT (menu), "monitor");
}
}
/**
* gtk_menu_get_monitor:
* @menu: a #GtkMenu
*
* Retrieves the number of the monitor on which to show the menu.
*
* Returns: the number of the monitor on which the menu should
* be popped up or -1, if no monitor has been set
*
* Since: 2.14
*/
gint
gtk_menu_get_monitor (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), -1);
return menu->priv->monitor_num;
}
/**
* gtk_menu_place_on_monitor:
* @menu: a #GtkMenu
* @monitor: the monitor to place the menu on
*
* Places @menu on the given monitor.
*
* Since: 3.22
*/
void
gtk_menu_place_on_monitor (GtkMenu *menu,
GdkMonitor *monitor)
{
GdkDisplay *display;
gint i, monitor_num;
g_return_if_fail (GTK_IS_MENU (menu));
display = gtk_widget_get_display (GTK_WIDGET (menu));
monitor_num = 0;
for (i = 0; ; i++)
{
GdkMonitor *m = gdk_display_get_monitor (display, i);
if (m == monitor)
{
monitor_num = i;
break;
}
if (m == NULL)
break;
}
gtk_menu_set_monitor (menu, monitor_num);
}
/**
* gtk_menu_get_for_attach_widget:
* @widget: a #GtkWidget
*
* Returns a list of the menus which are attached to this widget.
* This list is owned by GTK+ and must not be modified.
*
* Returns: (element-type GtkWidget) (transfer none): the list
* of menus attached to his widget.
*
* Since: 2.6
*/
GList*
gtk_menu_get_for_attach_widget (GtkWidget *widget)
{
GList *list;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
list = g_object_get_data (G_OBJECT (widget), ATTACHED_MENUS);
return list;
}
static void
gtk_menu_grab_notify (GtkWidget *widget,
gboolean was_grabbed)
{
GtkMenu *menu;
GtkWidget *toplevel;
GtkWindowGroup *group;
GtkWidget *grab;
GdkDevice *pointer;
menu = GTK_MENU (widget);
pointer = _gtk_menu_shell_get_grab_device (GTK_MENU_SHELL (widget));
if (!pointer ||
!gtk_widget_device_is_shadowed (widget, pointer))
return;
toplevel = gtk_widget_get_toplevel (widget);
if (!GTK_IS_WINDOW (toplevel))
return;
group = gtk_window_get_group (GTK_WINDOW (toplevel));
grab = gtk_window_group_get_current_grab (group);
if (GTK_MENU_SHELL (widget)->priv->active && !GTK_IS_MENU_SHELL (grab))
gtk_menu_shell_cancel (GTK_MENU_SHELL (widget));
menu->priv->drag_scroll_started = FALSE;
}
/**
* gtk_menu_set_reserve_toggle_size:
* @menu: a #GtkMenu
* @reserve_toggle_size: whether to reserve size for toggles
*
* Sets whether the menu should reserve space for drawing toggles
* or icons, regardless of their actual presence.
*
* Since: 2.18
*/
void
gtk_menu_set_reserve_toggle_size (GtkMenu *menu,
gboolean reserve_toggle_size)
{
GtkMenuPrivate *priv = menu->priv;
gboolean no_toggle_size;
g_return_if_fail (GTK_IS_MENU (menu));
no_toggle_size = !reserve_toggle_size;
if (priv->no_toggle_size != no_toggle_size)
{
priv->no_toggle_size = no_toggle_size;
g_object_notify (G_OBJECT (menu), "reserve-toggle-size");
}
}
/**
* gtk_menu_get_reserve_toggle_size:
* @menu: a #GtkMenu
*
* Returns whether the menu reserves space for toggles and
* icons, regardless of their actual presence.
*
* Returns: Whether the menu reserves toggle space
*
* Since: 2.18
*/
gboolean
gtk_menu_get_reserve_toggle_size (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), FALSE);
return !menu->priv->no_toggle_size;
}
/**
* gtk_menu_new_from_model:
* @model: a #GMenuModel
*
* Creates a #GtkMenu 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 belongs - typically
* by means of being attached to a widget (see gtk_menu_attach_to_widget())
* that is contained within the #GtkApplicationWindows widget hierarchy.
*
* Actions can also be added using gtk_widget_insert_action_group() on the menu's
* attach widget or on any of its parent widgets.
*
* Returns: a new #GtkMenu
*
* Since: 3.4
*/
GtkWidget *
gtk_menu_new_from_model (GMenuModel *model)
{
GtkWidget *menu;
g_return_val_if_fail (G_IS_MENU_MODEL (model), NULL);
menu = gtk_menu_new ();
gtk_menu_shell_bind_model (GTK_MENU_SHELL (menu), model, NULL, TRUE);
return menu;
}
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