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gtk2/gtk/gtkmenu.c
Kristian Rietveld e23ed60782 The table menu patch! Turns GtkMenu into a table, so you can attach menu 
Wed Sep 10 22:25:04 2003  Kristian Rietveld  <kris@gtk.org>

	The table menu patch! Turns GtkMenu into a table, so you can attach
	menu items in numerous new ways! Be creative!

	Contains some bug fixes and RTL adaptions from Matthias Clasen.

	* gtk/gtkmenu.c [toplevel]: introduce ATTACH_INFO_KEY, extend
	GtkMenuPrivate, introduce AttachInfo, add child properties enum,
	(gtk_menu_free_private), (gtk_menu_get_private): we have to free
	the heights array in the private struct,
	(gtk_menu_class_init): reorder code a bit, install child properties,
	(get_attach_info), (get_child_attach): new utility functions,
	(gtk_menu_set_child_property), (gtk_menu_get_child_property): introduce
	child properties, for the attach info,
	(gtk_menu_remove): remove AttachInfo from menu item,
	(gtk_menu_real_insert): implemented algorithm to automagically place
	inserted menu items at the correct place in the table,
	(gtk_menu_size_request), (gtk_menu_size_allocate),
	(compute_child_offset): reworked/rewritten to support table menus,
	(gtk_menu_attach): new function,
	(find_child_containing), (gtk_menu_move_current): new functions to
	get table menu keynav right.

	* gtk/gtkmenu.h: add gtk_menu_attach() prototype.
2003-09-10 20:32:33 +00:00

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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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. 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/.
*/
#define GTK_MENU_INTERNALS
#include <string.h> /* memset */
#include "gdk/gdkkeysyms.h"
#include "gtkaccelmap.h"
#include "gtkbindings.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkmenu.h"
#include "gtkmenuitem.h"
#include "gtktearoffmenuitem.h"
#include "gtkwindow.h"
#include "gtkhbox.h"
#include "gtkvscrollbar.h"
#include "gtksettings.h"
#include "gtkintl.h"
#define MENU_ITEM_CLASS(w) GTK_MENU_ITEM_GET_CLASS (w)
#define MENU_NEEDS_RESIZE(m) GTK_MENU_SHELL (m)->menu_flag
#define DEFAULT_POPUP_DELAY 225
#define DEFAULT_POPDOWN_DELAY 1000
#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_ARROW_HEIGHT 16
#define MENU_SCROLL_FAST_ZONE 8
#define MENU_SCROLL_TIMEOUT1 50
#define MENU_SCROLL_TIMEOUT2 50
#define ATTACH_INFO_KEY "gtk-menu-child-attach-info-key"
typedef struct _GtkMenuAttachData GtkMenuAttachData;
typedef struct _GtkMenuPrivate GtkMenuPrivate;
struct _GtkMenuAttachData
{
GtkWidget *attach_widget;
GtkMenuDetachFunc detacher;
};
struct _GtkMenuPrivate
{
gboolean have_position;
gint x;
gint y;
/* info used for the table */
guint rows;
guint columns;
guint *heights;
gint heights_length;
};
typedef struct
{
guint left_attach;
guint right_attach;
guint top_attach;
guint bottom_attach;
}
AttachInfo;
enum {
MOVE_SCROLL,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_TEAROFF_TITLE
};
enum
{
CHILD_PROP_0,
CHILD_PROP_LEFT_ATTACH,
CHILD_PROP_RIGHT_ATTACH,
CHILD_PROP_TOP_ATTACH,
CHILD_PROP_BOTTOM_ATTACH
};
static void gtk_menu_class_init (GtkMenuClass *klass);
static void gtk_menu_init (GtkMenu *menu);
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_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 (GtkObject *object);
static void gtk_menu_finalize (GObject *object);
static void gtk_menu_realize (GtkWidget *widget);
static void gtk_menu_unrealize (GtkWidget *widget);
static void gtk_menu_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_menu_paint (GtkWidget *widget,
GdkEventExpose *expose);
static void gtk_menu_show (GtkWidget *widget);
static gboolean gtk_menu_expose (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_menu_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_menu_button_release (GtkWidget *widget,
GdkEventButton *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_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_scrollbar_changed (GtkAdjustment *adjustment,
GtkMenu *menu);
static void gtk_menu_handle_scrolling (GtkMenu *menu,
gboolean enter);
static void gtk_menu_set_tearoff_hints (GtkMenu *menu,
gint width);
static void gtk_menu_style_set (GtkWidget *widget,
GtkStyle *previous_style);
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_stop_navigating_submenu_cb (gpointer user_data);
static gboolean gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y);
static void gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
GtkMenuItem *menu_item,
GdkEventCrossing *event);
static void gtk_menu_deactivate (GtkMenuShell *menu_shell);
static void gtk_menu_show_all (GtkWidget *widget);
static void gtk_menu_hide_all (GtkWidget *widget);
static void gtk_menu_position (GtkMenu *menu);
static void gtk_menu_reparent (GtkMenu *menu,
GtkWidget *new_parent,
gboolean unrealize);
static void gtk_menu_remove (GtkContainer *menu,
GtkWidget *widget);
static void gtk_menu_update_title (GtkMenu *menu);
static void menu_grab_transfer_window_destroy (GtkMenu *menu);
static GdkWindow *menu_grab_transfer_window_get (GtkMenu *menu);
static void _gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed);
static GtkMenuShellClass *parent_class = NULL;
static const gchar *attach_data_key = "gtk-menu-attach-data";
static guint menu_signals[LAST_SIGNAL] = { 0 };
static void
gtk_menu_free_private (gpointer data)
{
GtkMenuPrivate *priv = (GtkMenuPrivate *)data;
g_free (priv->heights);
}
GtkMenuPrivate *
gtk_menu_get_private (GtkMenu *menu)
{
GtkMenuPrivate *private;
static GQuark private_quark = 0;
if (!private_quark)
private_quark = g_quark_from_static_string ("gtk-menu-private");
private = g_object_get_qdata (G_OBJECT (menu), private_quark);
if (!private)
{
private = g_new0 (GtkMenuPrivate, 1);
private->have_position = FALSE;
g_object_set_qdata_full (G_OBJECT (menu), private_quark,
private, gtk_menu_free_private);
}
return private;
}
GType
gtk_menu_get_type (void)
{
static GType menu_type = 0;
if (!menu_type)
{
static const GTypeInfo menu_info =
{
sizeof (GtkMenuClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_menu_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkMenu),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_menu_init,
};
menu_type = g_type_register_static (GTK_TYPE_MENU_SHELL, "GtkMenu",
&menu_info, 0);
}
return menu_type;
}
static void
gtk_menu_class_init (GtkMenuClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkObjectClass *object_class = GTK_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;
parent_class = g_type_class_peek_parent (class);
gobject_class->finalize = gtk_menu_finalize;
gobject_class->set_property = gtk_menu_set_property;
gobject_class->get_property = gtk_menu_get_property;
object_class->destroy = gtk_menu_destroy;
widget_class->realize = gtk_menu_realize;
widget_class->unrealize = gtk_menu_unrealize;
widget_class->size_request = gtk_menu_size_request;
widget_class->size_allocate = gtk_menu_size_allocate;
widget_class->show = gtk_menu_show;
widget_class->expose_event = gtk_menu_expose;
widget_class->key_press_event = gtk_menu_key_press;
widget_class->button_press_event = gtk_menu_button_press;
widget_class->button_release_event = gtk_menu_button_release;
widget_class->motion_notify_event = gtk_menu_motion_notify;
widget_class->show_all = gtk_menu_show_all;
widget_class->hide_all = gtk_menu_hide_all;
widget_class->enter_notify_event = gtk_menu_enter_notify;
widget_class->leave_notify_event = gtk_menu_leave_notify;
widget_class->motion_notify_event = gtk_menu_motion_notify;
widget_class->style_set = gtk_menu_style_set;
widget_class->focus = gtk_menu_focus;
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;
menu_signals[MOVE_SCROLL] =
_gtk_binding_signal_new ("move_scroll",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_menu_real_move_scroll),
NULL, NULL,
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
g_object_class_install_property (gobject_class,
PROP_TEAROFF_TITLE,
g_param_spec_string ("tearoff-title",
_("Tearoff Title"),
_("A title that may be displayed by the window manager when this menu is torn-off"),
"",
G_PARAM_READABLE | G_PARAM_WRITABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("vertical-padding",
_("Vertical Padding"),
_("Extra space at the top and bottom of the menu"),
0,
G_MAXINT,
1,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("vertical-offset",
_("Vertical Offset"),
_("When the menu is a submenu, position it this number of pixels offset vertically"),
G_MININT,
G_MAXINT,
0,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("horizontal-offset",
_("Horizontal Offset"),
_("When the menu is a submenu, position it this number of pixels offset horizontally"),
G_MININT,
G_MAXINT,
-2,
G_PARAM_READABLE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_ATTACH,
g_param_spec_uint ("left_attach",
_("Left Attach"),
_("The column number to attach the left side of the child to"),
0, UINT_MAX, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_ATTACH,
g_param_spec_uint ("right_attach",
_("Right Attach"),
_("The column number to attach the right side of the child to"),
0, UINT_MAX, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_ATTACH,
g_param_spec_uint ("top_attach",
_("Top Attach"),
_("The row number to attach the top of the child to"),
0, UINT_MAX, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_ATTACH,
g_param_spec_uint ("bottom_attach",
_("Bottom Attach"),
_("The row number to attach the bottom of the child to"),
0, UINT_MAX, 0,
G_PARAM_READWRITE));
binding_set = gtk_binding_set_by_class (class);
gtk_binding_entry_add_signal (binding_set,
GDK_Up, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Up, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PREV);
gtk_binding_entry_add_signal (binding_set,
GDK_Down, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Down, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_NEXT);
gtk_binding_entry_add_signal (binding_set,
GDK_Left, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Left, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_PARENT);
gtk_binding_entry_add_signal (binding_set,
GDK_Right, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Right, 0,
"move_current", 1,
GTK_TYPE_MENU_DIRECTION_TYPE,
GTK_MENU_DIR_CHILD);
gtk_binding_entry_add_signal (binding_set,
GDK_Home, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Home, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_START);
gtk_binding_entry_add_signal (binding_set,
GDK_End, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_End, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_END);
gtk_binding_entry_add_signal (binding_set,
GDK_Page_Up, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Page_Up, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_UP);
gtk_binding_entry_add_signal (binding_set,
GDK_Page_Down, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
gtk_binding_entry_add_signal (binding_set,
GDK_KP_Page_Down, 0,
"move_scroll", 1,
GTK_TYPE_SCROLL_TYPE,
GTK_SCROLL_PAGE_DOWN);
gtk_settings_install_property (g_param_spec_boolean ("gtk-can-change-accels",
_("Can change accelerators"),
_("Whether menu accelerators can be changed by pressing a key over the menu item"),
FALSE,
G_PARAM_READWRITE));
gtk_settings_install_property (g_param_spec_int ("gtk-menu-popup-delay",
_("Delay before submenus appear"),
_("Minimum time the pointer must stay over a menu item before the submenu appear"),
0,
G_MAXINT,
DEFAULT_POPUP_DELAY,
G_PARAM_READWRITE));
gtk_settings_install_property (g_param_spec_int ("gtk-menu-popdown-delay",
_("Delay before hiding a submenu"),
_("The time before hiding a submenu when the pointer is moving towards the submenu"),
0,
G_MAXINT,
DEFAULT_POPDOWN_DELAY,
G_PARAM_READWRITE));
}
static void
gtk_menu_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu;
menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_TEAROFF_TITLE:
gtk_menu_set_title (menu, g_value_get_string (value));
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;
menu = GTK_MENU (object);
switch (prop_id)
{
case PROP_TEAROFF_TITLE:
g_value_set_string (value, gtk_menu_get_title (menu));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static AttachInfo *
get_attach_info (GObject *child)
{
AttachInfo *ai = g_object_get_data (child, ATTACH_INFO_KEY);
if (!ai)
{
ai = g_new0 (AttachInfo, 1);
g_object_set_data_full (child, ATTACH_INFO_KEY, ai, g_free);
}
return ai;
}
static void
gtk_menu_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkMenu *menu = GTK_MENU (container);
GtkMenuPrivate *priv;
AttachInfo *ai = get_attach_info (G_OBJECT (child));
priv = gtk_menu_get_private (menu);
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
ai->left_attach = g_value_get_uint (value);
break;
case CHILD_PROP_RIGHT_ATTACH:
ai->right_attach = g_value_get_uint (value);
break;
case CHILD_PROP_TOP_ATTACH:
ai->top_attach = g_value_get_uint (value);
break;
case CHILD_PROP_BOTTOM_ATTACH:
ai->bottom_attach = g_value_get_uint (value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
priv->columns = MAX (priv->columns, ai->right_attach);
priv->rows = MAX (priv->rows, ai->bottom_attach);
gtk_widget_queue_resize (GTK_WIDGET (menu));
}
static void
gtk_menu_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
AttachInfo *ai = get_attach_info (G_OBJECT (child));
switch (property_id)
{
case CHILD_PROP_LEFT_ATTACH:
g_value_set_uint (value, ai->left_attach);
break;
case CHILD_PROP_RIGHT_ATTACH:
g_value_set_uint (value, ai->right_attach);
break;
case CHILD_PROP_TOP_ATTACH:
g_value_set_uint (value, ai->top_attach);
break;
case CHILD_PROP_BOTTOM_ATTACH:
g_value_set_uint (value, ai->bottom_attach);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
}
static void
get_child_attach (GtkWidget *child,
gint *l,
gint *r,
gint *t,
gint *b)
{
gtk_container_child_get (GTK_CONTAINER (child->parent), child,
"left_attach", l,
"right_attach", r,
"top_attach", t,
"bottom_attach", b,
NULL);
}
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_KEY_PRESS:
case GDK_KEY_RELEASE:
handled = gtk_widget_event (menu, event);
break;
default:
break;
}
g_object_unref (window);
g_object_unref (menu);
return handled;
}
static void
gtk_menu_window_size_request (GtkWidget *window,
GtkRequisition *requisition,
GtkMenu *menu)
{
GtkMenuPrivate *private = gtk_menu_get_private (menu);
if (private->have_position)
{
GdkScreen *screen = gtk_widget_get_screen (window);
GdkRectangle monitor;
gint monitor_num;
monitor_num = gdk_screen_get_monitor_at_point (screen,
private->x, private->y);
gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
if (private->y + requisition->height > monitor.y + monitor.height)
requisition->height = monitor.y + monitor.height - private->y;
if (private->y < monitor.y)
requisition->height -= monitor.y - private->y;
}
}
static void
gtk_menu_init (GtkMenu *menu)
{
menu->parent_menu_item = NULL;
menu->old_active_menu_item = NULL;
menu->accel_group = NULL;
menu->position_func = NULL;
menu->position_func_data = NULL;
menu->toggle_size = 0;
menu->toplevel = g_object_connect (g_object_new (GTK_TYPE_WINDOW,
"type", GTK_WINDOW_POPUP,
"child", menu,
NULL),
"signal::event", gtk_menu_window_event, menu,
"signal::size_request", gtk_menu_window_size_request, menu,
"signal::destroy", gtk_widget_destroyed, &menu->toplevel,
NULL);
gtk_window_set_resizable (GTK_WINDOW (menu->toplevel), FALSE);
gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->toplevel), 0);
/* Refloat the menu, so that reference counting for the menu isn't
* affected by it being a child of the toplevel
*/
GTK_WIDGET_SET_FLAGS (menu, GTK_FLOATING);
menu->needs_destruction_ref_count = TRUE;
menu->view_window = NULL;
menu->bin_window = NULL;
menu->scroll_offset = 0;
menu->scroll_step = 0;
menu->timeout_id = 0;
menu->scroll_fast = FALSE;
menu->tearoff_window = NULL;
menu->tearoff_hbox = NULL;
menu->torn_off = FALSE;
menu->tearoff_active = FALSE;
menu->tearoff_adjustment = NULL;
menu->tearoff_scrollbar = NULL;
menu->upper_arrow_visible = FALSE;
menu->lower_arrow_visible = FALSE;
menu->upper_arrow_prelight = FALSE;
menu->lower_arrow_prelight = FALSE;
MENU_NEEDS_RESIZE (menu) = TRUE;
}
static void
gtk_menu_destroy (GtkObject *object)
{
GtkMenu *menu;
GtkMenuAttachData *data;
g_return_if_fail (GTK_IS_MENU (object));
menu = GTK_MENU (object);
gtk_menu_stop_scrolling (menu);
data = g_object_get_data (G_OBJECT (object), attach_data_key);
if (data)
gtk_menu_detach (menu);
gtk_menu_stop_navigating_submenu (menu);
if (menu->old_active_menu_item)
{
g_object_unref (menu->old_active_menu_item);
menu->old_active_menu_item = NULL;
}
/* Add back the reference count for being a child */
if (menu->needs_destruction_ref_count)
{
menu->needs_destruction_ref_count = FALSE;
g_object_ref (object);
}
if (menu->accel_group)
{
g_object_unref (menu->accel_group);
menu->accel_group = NULL;
}
if (menu->toplevel)
gtk_widget_destroy (menu->toplevel);
if (menu->tearoff_window)
gtk_widget_destroy (menu->tearoff_window);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gtk_menu_finalize (GObject *object)
{
GtkMenu *menu = GTK_MENU (object);
g_free (menu->accel_path);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
menu_change_screen (GtkMenu *menu,
GdkScreen *new_screen)
{
if (menu->torn_off)
{
gtk_window_set_screen (GTK_WINDOW (menu->tearoff_window), new_screen);
gtk_menu_position (menu);
}
gtk_window_set_screen (GTK_WINDOW (menu->toplevel), new_screen);
}
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));
}
}
void
gtk_menu_attach_to_widget (GtkMenu *menu,
GtkWidget *attach_widget,
GtkMenuDetachFunc detacher)
{
GtkMenuAttachData *data;
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_WIDGET (attach_widget));
g_return_if_fail (detacher != NULL);
/* 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 (menu);
gtk_object_sink (GTK_OBJECT (menu));
data = g_new (GtkMenuAttachData, 1);
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), attach_data_key, data);
if (GTK_WIDGET_STATE (menu) != GTK_STATE_NORMAL)
gtk_widget_set_state (GTK_WIDGET (menu), GTK_STATE_NORMAL);
/* we don't need to set the style here, since
* we are a toplevel widget.
*/
/* Fallback title for menu comes from attach widget */
gtk_menu_update_title (menu);
}
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;
}
void
gtk_menu_detach (GtkMenu *menu)
{
GtkMenuAttachData *data;
g_return_if_fail (GTK_IS_MENU (menu));
/* 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), attach_data_key, NULL);
g_signal_handlers_disconnect_by_func (data->attach_widget,
(gpointer) attach_widget_screen_changed,
menu);
data->detacher (data->attach_widget, menu);
if (GTK_WIDGET_REALIZED (menu))
gtk_widget_unrealize (GTK_WIDGET (menu));
g_free (data);
/* Fallback title for menu comes from attach widget */
gtk_menu_update_title (menu);
g_object_unref (menu);
}
static void
gtk_menu_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkMenu *menu;
g_return_if_fail (GTK_IS_MENU (container));
g_return_if_fail (GTK_IS_MENU_ITEM (widget));
menu = GTK_MENU (container);
/* Clear out old_active_menu_item if it matches the item we are removing
*/
if (menu->old_active_menu_item == widget)
{
g_object_unref (menu->old_active_menu_item);
menu->old_active_menu_item = NULL;
}
g_object_set_data (G_OBJECT (widget), ATTACH_INFO_KEY, NULL);
GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
}
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)
{
gint i;
GList *children;
GtkMenuPrivate *priv;
if (GTK_WIDGET_REALIZED (menu_shell))
gtk_widget_set_parent_window (child, GTK_MENU (menu_shell)->bin_window);
GTK_MENU_SHELL_CLASS (parent_class)->insert (menu_shell, child, position);
priv = gtk_menu_get_private (GTK_MENU (menu_shell));
if (position < 0)
{
/* attach after the last row */
i = g_list_length (menu_shell->children) - 1;
gtk_menu_attach (GTK_MENU (menu_shell), child,
0, priv->columns ? priv->columns : 1,
i, i + 1);
return;
}
/* we need to make space for this new item; move all items with
* top >= position one down
*/
for (children = menu_shell->children; children; children = children->next)
{
guint top, bottom;
gtk_container_child_get (GTK_CONTAINER (menu_shell), children->data,
"top_attach", &top,
"bottom_attach", &bottom,
NULL);
if (top >= position)
gtk_container_child_set (GTK_CONTAINER (menu_shell), children->data,
"top_attach", top + 1,
"bottom_attach", bottom + 1,
NULL);
}
/* attach the new item */
gtk_menu_attach (GTK_MENU (menu_shell), child,
0, priv->columns ? priv->columns : 1,
position, position + 1);
}
static void
gtk_menu_tearoff_bg_copy (GtkMenu *menu)
{
GtkWidget *widget;
gint width, height;
widget = GTK_WIDGET (menu);
if (menu->torn_off)
{
GdkPixmap *pixmap;
GdkGC *gc;
GdkGCValues gc_values;
menu->tearoff_active = FALSE;
menu->saved_scroll_offset = menu->scroll_offset;
gc_values.subwindow_mode = GDK_INCLUDE_INFERIORS;
gc = gdk_gc_new_with_values (widget->window,
&gc_values, GDK_GC_SUBWINDOW);
gdk_drawable_get_size (menu->tearoff_window->window, &width, &height);
pixmap = gdk_pixmap_new (menu->tearoff_window->window,
width,
height,
-1);
gdk_draw_drawable (pixmap, gc,
menu->tearoff_window->window,
0, 0, 0, 0, -1, -1);
g_object_unref (gc);
gtk_widget_set_size_request (menu->tearoff_window,
width,
height);
gdk_window_set_back_pixmap (menu->tearoff_window->window, pixmap, FALSE);
g_object_unref (pixmap);
}
}
static gboolean
popup_grab_on_window (GdkWindow *window,
guint32 activate_time)
{
if ((gdk_pointer_grab (window, TRUE,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK,
NULL, NULL, activate_time) == 0))
{
if (gdk_keyboard_grab (window, TRUE,
activate_time) == 0)
return TRUE;
else
{
gdk_display_pointer_ungrab (gdk_drawable_get_display (window),
activate_time);
return FALSE;
}
}
return FALSE;
}
/**
* gtk_menu_popup:
* @menu: a #GtkMenu.
* @parent_menu_shell: the menu shell containing the triggering menu item, or %NULL
* @parent_menu_item: the menu item whose activation triggered the popup, or %NULL
* @func: 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 should be the time stamp of the event that
* initiated the popup. If such an event is not available, use
* gtk_get_current_event_time() instead.
*
*/
void
gtk_menu_popup (GtkMenu *menu,
GtkWidget *parent_menu_shell,
GtkWidget *parent_menu_item,
GtkMenuPositionFunc func,
gpointer data,
guint button,
guint32 activate_time)
{
GtkWidget *widget;
GtkWidget *xgrab_shell;
GtkWidget *parent;
GdkEvent *current_event;
GtkMenuShell *menu_shell;
g_return_if_fail (GTK_IS_MENU (menu));
widget = GTK_WIDGET (menu);
menu_shell = GTK_MENU_SHELL (menu);
menu_shell->parent_menu_shell = parent_menu_shell;
/* 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_MAPPED (tmp))
{
viewable = FALSE;
break;
}
tmp = tmp->parent;
}
if (viewable)
xgrab_shell = parent;
parent = GTK_MENU_SHELL (parent)->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 convuluted - we
* 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*).
*/
if (xgrab_shell && xgrab_shell != widget)
{
if (popup_grab_on_window (xgrab_shell->window, activate_time))
GTK_MENU_SHELL (xgrab_shell)->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, activate_time))
GTK_MENU_SHELL (xgrab_shell)->have_xgrab = TRUE;
}
if (!GTK_MENU_SHELL (xgrab_shell)->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->parent_menu_shell = NULL;
menu_grab_transfer_window_destroy (menu);
return;
}
menu_shell->active = TRUE;
menu_shell->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->ignore_enter = TRUE;
gdk_event_free (current_event);
}
if (menu->torn_off)
{
gtk_menu_tearoff_bg_copy (menu);
gtk_menu_reparent (menu, menu->toplevel, FALSE);
}
menu->parent_menu_item = parent_menu_item;
menu->position_func = func;
menu->position_func_data = data;
menu_shell->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 the GTK_WIDGET_VISIBLE (menu)
*/
gtk_widget_show (GTK_WIDGET (menu));
/* Position the menu, possibly changing the size request
*/
gtk_menu_position (menu);
/* Compute the size of the toplevel and realize it so we
* can scroll correctly.
*/
{
GtkRequisition tmp_request;
GtkAllocation tmp_allocation = { 0, };
gtk_widget_size_request (menu->toplevel, &tmp_request);
tmp_allocation.width = tmp_request.width;
tmp_allocation.height = tmp_request.height;
gtk_widget_size_allocate (menu->toplevel, &tmp_allocation);
gtk_widget_realize (GTK_WIDGET (menu));
}
gtk_menu_scroll_to (menu, menu->scroll_offset);
/* Once everything is set up correctly, map the toplevel window on
the screen.
*/
gtk_widget_show (menu->toplevel);
if (xgrab_shell == widget)
popup_grab_on_window (widget->window, activate_time); /* Should always succeed */
gtk_grab_add (GTK_WIDGET (menu));
}
void
gtk_menu_popdown (GtkMenu *menu)
{
GtkMenuPrivate *private;
GtkMenuShell *menu_shell;
g_return_if_fail (GTK_IS_MENU (menu));
menu_shell = GTK_MENU_SHELL (menu);
private = gtk_menu_get_private (menu);
menu_shell->parent_menu_shell = NULL;
menu_shell->active = FALSE;
menu_shell->ignore_enter = FALSE;
private->have_position = FALSE;
gtk_menu_stop_scrolling (menu);
gtk_menu_stop_navigating_submenu (menu);
if (menu_shell->active_menu_item)
{
if (menu->old_active_menu_item)
g_object_unref (menu->old_active_menu_item);
menu->old_active_menu_item = menu_shell->active_menu_item;
g_object_ref (menu->old_active_menu_item);
}
gtk_menu_shell_deselect (menu_shell);
/* The X Grab, if present, will automatically be removed when we hide
* the window */
gtk_widget_hide (menu->toplevel);
if (menu->torn_off)
{
gtk_widget_set_size_request (menu->tearoff_window, -1, -1);
if (GTK_BIN (menu->toplevel)->child)
{
gtk_menu_reparent (menu, menu->tearoff_hbox, TRUE);
}
else
{
/* We popped up the menu from the tearoff, so we need to
* release the grab - we aren't actually hiding the menu.
*/
if (menu_shell->have_xgrab)
{
GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (menu));
gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
}
}
/* gtk_menu_popdown is called each time a menu item is selected from
* a torn off menu. Only scroll back to the saved position if the
* non-tearoff menu was popped down.
*/
if (!menu->tearoff_active)
gtk_menu_scroll_to (menu, menu->saved_scroll_offset);
menu->tearoff_active = TRUE;
}
else
gtk_widget_hide (GTK_WIDGET (menu));
menu_shell->have_xgrab = FALSE;
gtk_grab_remove (GTK_WIDGET (menu));
menu_grab_transfer_window_destroy (menu);
}
GtkWidget*
gtk_menu_get_active (GtkMenu *menu)
{
GtkWidget *child;
GList *children;
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
if (!menu->old_active_menu_item)
{
child = NULL;
children = GTK_MENU_SHELL (menu)->children;
while (children)
{
child = children->data;
children = children->next;
if (GTK_BIN (child)->child)
break;
child = NULL;
}
menu->old_active_menu_item = child;
if (menu->old_active_menu_item)
g_object_ref (menu->old_active_menu_item);
}
return menu->old_active_menu_item;
}
void
gtk_menu_set_active (GtkMenu *menu,
guint index)
{
GtkWidget *child;
GList *tmp_list;
g_return_if_fail (GTK_IS_MENU (menu));
tmp_list = g_list_nth (GTK_MENU_SHELL (menu)->children, index);
if (tmp_list)
{
child = tmp_list->data;
if (GTK_BIN (child)->child)
{
if (menu->old_active_menu_item)
g_object_unref (menu->old_active_menu_item);
menu->old_active_menu_item = child;
g_object_ref (menu->old_active_menu_item);
}
}
}
void
gtk_menu_set_accel_group (GtkMenu *menu,
GtkAccelGroup *accel_group)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (menu->accel_group != accel_group)
{
if (menu->accel_group)
g_object_unref (menu->accel_group);
menu->accel_group = accel_group;
if (menu->accel_group)
g_object_ref (menu->accel_group);
_gtk_menu_refresh_accel_paths (menu, TRUE);
}
}
GtkAccelGroup*
gtk_menu_get_accel_group (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return menu->accel_group;
}
/**
* gtk_menu_set_accel_path
* @menu: a valid #GtkMenu
* @accel_path: 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
* <literal>gtk_menu_set_accel_path (menu, "&lt;Gnumeric-Sheet&gt;/File");</literal>
* has been called, assign its items the accel paths:
* <literal>"&lt;Gnumeric-Sheet&gt;/File/New"</literal> and <literal>"&lt;Gnumeric-Sheet&gt;/File/Exit"</literal>.
* 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().
*/
void
gtk_menu_set_accel_path (GtkMenu *menu,
const gchar *accel_path)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (accel_path)
g_return_if_fail (accel_path[0] == '<' && strchr (accel_path, '/')); /* simplistic check */
g_free (menu->accel_path);
menu->accel_path = g_strdup (accel_path);
if (menu->accel_path)
_gtk_menu_refresh_accel_paths (menu, FALSE);
}
typedef struct {
GtkMenu *menu;
gboolean group_changed;
} AccelPropagation;
static void
refresh_accel_paths_foreach (GtkWidget *widget,
gpointer data)
{
AccelPropagation *prop = data;
if (GTK_IS_MENU_ITEM (widget)) /* should always be true */
_gtk_menu_item_refresh_accel_path (GTK_MENU_ITEM (widget),
prop->menu->accel_path,
prop->menu->accel_group,
prop->group_changed);
}
static void
_gtk_menu_refresh_accel_paths (GtkMenu *menu,
gboolean group_changed)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (menu->accel_path && menu->accel_group)
{
AccelPropagation prop;
prop.menu = menu;
prop.group_changed = group_changed;
gtk_container_foreach (GTK_CONTAINER (menu),
refresh_accel_paths_foreach,
&prop);
}
}
void
gtk_menu_reposition (GtkMenu *menu)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (GTK_WIDGET_DRAWABLE (menu) && !menu->torn_off)
gtk_menu_position (menu);
}
static void
gtk_menu_scrollbar_changed (GtkAdjustment *adjustment,
GtkMenu *menu)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (adjustment->value != menu->scroll_offset)
gtk_menu_scroll_to (menu, adjustment->value);
}
static void
gtk_menu_set_tearoff_hints (GtkMenu *menu,
gint width)
{
GdkGeometry geometry_hints;
if (!menu->tearoff_window)
return;
if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
{
gtk_widget_size_request (menu->tearoff_scrollbar, NULL);
width += menu->tearoff_scrollbar->requisition.width;
}
geometry_hints.min_width = width;
geometry_hints.max_width = width;
geometry_hints.min_height = 0;
geometry_hints.max_height = GTK_WIDGET (menu)->requisition.height;
gtk_window_set_geometry_hints (GTK_WINDOW (menu->tearoff_window),
NULL,
&geometry_hints,
GDK_HINT_MAX_SIZE|GDK_HINT_MIN_SIZE);
}
static void
gtk_menu_update_title (GtkMenu *menu)
{
if (menu->tearoff_window)
{
const gchar *title;
GtkWidget *attach_widget;
title = gtk_menu_get_title (menu);
if (!title)
{
attach_widget = gtk_menu_get_attach_widget (menu);
if (GTK_IS_MENU_ITEM (attach_widget))
{
GtkWidget *child = GTK_BIN (attach_widget)->child;
if (GTK_IS_LABEL (child))
title = gtk_label_get_text (GTK_LABEL (child));
}
}
if (title)
gtk_window_set_title (GTK_WINDOW (menu->tearoff_window), title);
}
}
void
gtk_menu_set_tearoff_state (GtkMenu *menu,
gboolean torn_off)
{
gint width, height;
g_return_if_fail (GTK_IS_MENU (menu));
if (menu->torn_off != torn_off)
{
menu->torn_off = torn_off;
menu->tearoff_active = torn_off;
if (menu->torn_off)
{
if (GTK_WIDGET_VISIBLE (menu))
gtk_menu_popdown (menu);
if (!menu->tearoff_window)
{
menu->tearoff_window = gtk_widget_new (GTK_TYPE_WINDOW,
"type", GTK_WINDOW_TOPLEVEL,
"screen", gtk_widget_get_screen (menu->toplevel),
"app_paintable", TRUE,
NULL);
gtk_window_set_type_hint (GTK_WINDOW (menu->tearoff_window),
GDK_WINDOW_TYPE_HINT_MENU);
gtk_window_set_mnemonic_modifier (GTK_WINDOW (menu->tearoff_window), 0);
g_signal_connect (menu->tearoff_window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &menu->tearoff_window);
g_signal_connect (menu->tearoff_window, "event",
G_CALLBACK (gtk_menu_window_event), menu);
gtk_menu_update_title (menu);
gtk_widget_realize (menu->tearoff_window);
menu->tearoff_hbox = gtk_hbox_new (FALSE, FALSE);
gtk_container_add (GTK_CONTAINER (menu->tearoff_window), menu->tearoff_hbox);
gdk_drawable_get_size (GTK_WIDGET (menu)->window, &width, &height);
menu->tearoff_adjustment =
GTK_ADJUSTMENT (gtk_adjustment_new (0,
0,
GTK_WIDGET (menu)->requisition.height,
MENU_SCROLL_STEP2,
height/2,
height));
g_object_connect (menu->tearoff_adjustment,
"signal::value_changed", gtk_menu_scrollbar_changed, menu,
NULL);
menu->tearoff_scrollbar = gtk_vscrollbar_new (menu->tearoff_adjustment);
gtk_box_pack_end (GTK_BOX (menu->tearoff_hbox),
menu->tearoff_scrollbar,
FALSE, FALSE, 0);
if (menu->tearoff_adjustment->upper > height)
gtk_widget_show (menu->tearoff_scrollbar);
gtk_widget_show (menu->tearoff_hbox);
}
gtk_menu_reparent (menu, menu->tearoff_hbox, FALSE);
gdk_drawable_get_size (GTK_WIDGET (menu)->window, &width, NULL);
/* Update menu->requisition
*/
gtk_widget_size_request (GTK_WIDGET (menu), NULL);
gtk_menu_set_tearoff_hints (menu, width);
gtk_widget_realize (menu->tearoff_window);
gtk_menu_position (menu);
gtk_widget_show (GTK_WIDGET (menu));
gtk_widget_show (menu->tearoff_window);
gtk_menu_scroll_to (menu, 0);
}
else
{
gtk_widget_hide (menu->tearoff_window);
gtk_menu_reparent (menu, menu->toplevel, FALSE);
gtk_widget_destroy (menu->tearoff_window);
menu->tearoff_window = NULL;
menu->tearoff_hbox = NULL;
menu->tearoff_scrollbar = NULL;
menu->tearoff_adjustment = NULL;
}
}
}
/**
* gtk_menu_get_tearoff_state:
* @menu: a #GtkMenu
*
* Returns whether the menu is torn off. See
* gtk_menu_set_tearoff_state ().
*
* Return value: %TRUE if the menu is currently torn off.
**/
gboolean
gtk_menu_get_tearoff_state (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), FALSE);
return menu->torn_off;
}
/**
* gtk_menu_set_title:
* @menu: a #GtkMenu
* @title: a string containing the title for the menu.
*
* Sets the title string for the menu. The title is displayed when the menu
* is shown as a tearoff menu.
**/
void
gtk_menu_set_title (GtkMenu *menu,
const gchar *title)
{
g_return_if_fail (GTK_IS_MENU (menu));
if (title)
g_object_set_data_full (G_OBJECT (menu), "gtk-menu-title",
g_strdup (title), (GtkDestroyNotify) g_free);
else
g_object_set_data (G_OBJECT (menu), "gtk-menu-title", NULL);
gtk_menu_update_title (menu);
g_object_notify (G_OBJECT (menu), "tearoff_title");
}
/**
* gtk_menu_get_title:
* @menu: a #GtkMenu
*
* Returns the title of the menu. See gtk_menu_set_title().
*
* Return value: the title of the menu, or %NULL if the menu has no
* title set on it. This string is owned by the widget and should
* not be modified or freed.
**/
G_CONST_RETURN gchar *
gtk_menu_get_title (GtkMenu *menu)
{
g_return_val_if_fail (GTK_IS_MENU (menu), NULL);
return g_object_get_data (G_OBJECT (menu), "gtk-menu-title");
}
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->children, child))
{
menu_shell->children = g_list_remove (menu_shell->children, child);
menu_shell->children = g_list_insert (menu_shell->children, child, position);
if (GTK_WIDGET_VISIBLE (menu_shell))
gtk_widget_queue_resize (GTK_WIDGET (menu_shell));
}
}
static void
gtk_menu_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
if (GTK_WIDGET_REALIZED (widget))
{
GtkMenu *menu = GTK_MENU (widget);
gtk_style_set_background (widget->style, menu->bin_window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, menu->view_window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
}
}
static void
gtk_menu_realize (GtkWidget *widget)
{
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
GtkMenu *menu;
GtkWidget *child;
GList *children;
guint vertical_padding;
g_return_if_fail (GTK_IS_MENU (widget));
menu = GTK_MENU (widget);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_EXPOSURE_MASK | GDK_KEY_PRESS_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
gdk_window_set_user_data (widget->window, widget);
border_width = GTK_CONTAINER (widget)->border_width;
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
attributes.x = border_width + widget->style->xthickness;
attributes.y = border_width + widget->style->ythickness + vertical_padding;
attributes.width = MAX (1, widget->allocation.width - attributes.x * 2);
attributes.height = MAX (1, widget->allocation.height - attributes.y * 2);
if (menu->upper_arrow_visible)
{
attributes.y += MENU_SCROLL_ARROW_HEIGHT;
attributes.height -= MENU_SCROLL_ARROW_HEIGHT;
}
if (menu->lower_arrow_visible)
attributes.height -= MENU_SCROLL_ARROW_HEIGHT;
menu->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
gdk_window_set_user_data (menu->view_window, menu);
attributes.x = 0;
attributes.y = 0;
attributes.height = MAX (1, widget->requisition.height - (border_width + widget->style->ythickness + vertical_padding) * 2);
menu->bin_window = gdk_window_new (menu->view_window, &attributes, attributes_mask);
gdk_window_set_user_data (menu->bin_window, menu);
children = GTK_MENU_SHELL (menu)->children;
while (children)
{
child = children->data;
children = children->next;
gtk_widget_set_parent_window (child, menu->bin_window);
}
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, menu->bin_window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, menu->view_window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
if (GTK_MENU_SHELL (widget)->active_menu_item)
gtk_menu_scroll_item_visible (GTK_MENU_SHELL (widget),
GTK_MENU_SHELL (widget)->active_menu_item);
gdk_window_show (menu->bin_window);
gdk_window_show (menu->view_window);
}
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)
{
GdkWindowAttr attributes;
gint attributes_mask;
attributes.x = -100;
attributes.y = -100;
attributes.width = 10;
attributes.height = 10;
attributes.window_type = GDK_WINDOW_TEMP;
attributes.wclass = GDK_INPUT_ONLY;
attributes.override_redirect = TRUE;
attributes.event_mask = 0;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
window = gdk_window_new (gtk_widget_get_root_window (GTK_WIDGET (menu)),
&attributes, attributes_mask);
gdk_window_set_user_data (window, menu);
gdk_window_show (window);
g_object_set_data (G_OBJECT (menu), "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)
{
gdk_window_set_user_data (window, NULL);
gdk_window_destroy (window);
g_object_set_data (G_OBJECT (menu), "gtk-menu-transfer-window", NULL);
}
}
static void
gtk_menu_unrealize (GtkWidget *widget)
{
GtkMenu *menu;
g_return_if_fail (GTK_IS_MENU (widget));
menu = GTK_MENU (widget);
menu_grab_transfer_window_destroy (menu);
gdk_window_set_user_data (menu->view_window, NULL);
gdk_window_destroy (menu->view_window);
menu->view_window = NULL;
gdk_window_set_user_data (menu->bin_window, NULL);
gdk_window_destroy (menu->bin_window);
menu->bin_window = NULL;
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_menu_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
gint i;
GtkMenu *menu;
GtkMenuShell *menu_shell;
GtkWidget *child;
GList *children;
guint max_toggle_size;
guint max_accel_width;
guint vertical_padding;
GtkRequisition child_requisition;
GtkMenuPrivate *priv;
g_return_if_fail (GTK_IS_MENU (widget));
g_return_if_fail (requisition != NULL);
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
priv = gtk_menu_get_private (menu);
requisition->width = 0;
requisition->height = 0;
max_toggle_size = 0;
max_accel_width = 0;
g_free (priv->heights);
priv->heights = g_new0 (guint, priv->rows);
priv->heights_length = priv->rows;
children = menu_shell->children;
while (children)
{
gint part;
gint toggle_size;
guint l, r, t, b;
child = children->data;
children = children->next;
if (! GTK_WIDGET_VISIBLE (child))
continue;
get_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_MENU_ITEM (child)->show_submenu_indicator = TRUE;
gtk_widget_size_request (child, &child_requisition);
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)->accelerator_width);
part = child_requisition.width / (r - l);
requisition->width = MAX (requisition->width, part);
part = child_requisition.height / (b - t);
priv->heights[t] = MAX (priv->heights[t], part);
}
for (i = 0; i < priv->rows; i++)
requisition->height += priv->heights[i];
requisition->width += max_toggle_size + max_accel_width;
requisition->width *= priv->columns;
requisition->width += (GTK_CONTAINER (menu)->border_width +
widget->style->xthickness) * 2;
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
requisition->height += (GTK_CONTAINER (menu)->border_width + vertical_padding +
widget->style->ythickness) * 2;
menu->toggle_size = max_toggle_size;
/* Don't resize the tearoff if it is not active, because it won't redraw (it is only a background pixmap).
*/
if (menu->tearoff_active)
gtk_menu_set_tearoff_hints (menu, requisition->width);
}
static void
gtk_menu_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkMenu *menu;
GtkMenuShell *menu_shell;
GtkWidget *child;
GtkAllocation child_allocation;
GtkRequisition child_requisition;
GtkMenuPrivate *priv;
GList *children;
gint x, y;
gint width, height;
guint vertical_padding;
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 = gtk_menu_get_private (menu);
widget->allocation = *allocation;
gtk_widget_get_child_requisition (GTK_WIDGET (menu), &child_requisition);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
x = GTK_CONTAINER (menu)->border_width + widget->style->xthickness;
y = GTK_CONTAINER (menu)->border_width + widget->style->ythickness + vertical_padding;
width = MAX (1, allocation->width - x * 2);
height = MAX (1, allocation->height - y * 2);
child_requisition.width -= x * 2;
child_requisition.height -= y * 2;
if (menu_shell->active)
gtk_menu_scroll_to (menu, menu->scroll_offset);
if (menu->upper_arrow_visible && !menu->tearoff_active)
{
y += MENU_SCROLL_ARROW_HEIGHT;
height -= MENU_SCROLL_ARROW_HEIGHT;
}
if (menu->lower_arrow_visible && !menu->tearoff_active)
height -= MENU_SCROLL_ARROW_HEIGHT;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gdk_window_move_resize (menu->view_window,
x,
y,
width,
height);
}
if (menu_shell->children)
{
gint base_width = width / priv->columns;
children = menu_shell->children;
while (children)
{
child = children->data;
children = children->next;
if (GTK_WIDGET_VISIBLE (child))
{
gint i;
guint l, r, t, b;
get_child_attach (child, &l, &r, &t, &b);
if (gtk_widget_get_direction (GTK_WIDGET (menu)) == GTK_TEXT_DIR_RTL)
{
guint tmp;
tmp = priv->columns - l;
l = priv->columns - 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),
menu->toggle_size);
gtk_widget_size_allocate (child, &child_allocation);
gtk_widget_queue_draw (child);
}
}
/* Resize the item window */
if (GTK_WIDGET_REALIZED (widget))
{
gint i;
gint width, height;
height = 0;
for (i = 0; i < priv->rows; i++)
height += priv->heights[i];
width = priv->columns * base_width;
gdk_window_resize (menu->bin_window, width, height);
}
if (menu->tearoff_active)
{
if (allocation->height >= widget->requisition.height)
{
if (GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
{
gtk_widget_hide (menu->tearoff_scrollbar);
gtk_menu_set_tearoff_hints (menu, allocation->width);
gtk_menu_scroll_to (menu, 0);
}
}
else
{
menu->tearoff_adjustment->upper = widget->requisition.height;
menu->tearoff_adjustment->page_size = allocation->height;
if (menu->tearoff_adjustment->value + menu->tearoff_adjustment->page_size >
menu->tearoff_adjustment->upper)
{
gint value;
value = menu->tearoff_adjustment->upper - menu->tearoff_adjustment->page_size;
if (value < 0)
value = 0;
gtk_menu_scroll_to (menu, value);
}
gtk_adjustment_changed (menu->tearoff_adjustment);
if (!GTK_WIDGET_VISIBLE (menu->tearoff_scrollbar))
{
gtk_widget_show (menu->tearoff_scrollbar);
gtk_menu_set_tearoff_hints (menu, allocation->width);
}
}
}
}
}
static void
gtk_menu_paint (GtkWidget *widget,
GdkEventExpose *event)
{
GtkMenu *menu;
gint width, height;
gint border_x, border_y;
guint vertical_padding;
g_return_if_fail (GTK_IS_MENU (widget));
menu = GTK_MENU (widget);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
border_x = GTK_CONTAINER (widget)->border_width + widget->style->xthickness;
border_y = GTK_CONTAINER (widget)->border_width + widget->style->ythickness + vertical_padding;
gdk_drawable_get_size (widget->window, &width, &height);
if (event->window == widget->window)
{
gint arrow_space = MENU_SCROLL_ARROW_HEIGHT - 2 * widget->style->ythickness;
gint arrow_size = 0.7 * arrow_space;
gtk_paint_box (widget->style,
widget->window,
GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, widget, "menu",
0, 0, -1, -1);
if (menu->upper_arrow_visible && !menu->tearoff_active)
{
gtk_paint_box (widget->style,
widget->window,
menu->upper_arrow_prelight ?
GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, widget, "menu",
border_x,
border_y,
width - 2 * border_x,
MENU_SCROLL_ARROW_HEIGHT);
gtk_paint_arrow (widget->style,
widget->window,
menu->upper_arrow_prelight ?
GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, widget, "menu_scroll_arrow_up",
GTK_ARROW_UP,
TRUE,
(width - arrow_size ) / 2,
border_y + widget->style->ythickness + (arrow_space - arrow_size)/2,
arrow_size, arrow_size);
}
if (menu->lower_arrow_visible && !menu->tearoff_active)
{
gtk_paint_box (widget->style,
widget->window,
menu->lower_arrow_prelight ?
GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, widget, "menu",
border_x,
height - border_y - MENU_SCROLL_ARROW_HEIGHT,
width - 2*border_x,
MENU_SCROLL_ARROW_HEIGHT);
gtk_paint_arrow (widget->style,
widget->window,
menu->lower_arrow_prelight ?
GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, widget, "menu_scroll_arrow_down",
GTK_ARROW_DOWN,
TRUE,
(width - arrow_size) / 2,
height - border_y - MENU_SCROLL_ARROW_HEIGHT +
widget->style->ythickness + (arrow_space - arrow_size)/2,
arrow_size, arrow_size);
}
}
}
static gboolean
gtk_menu_expose (GtkWidget *widget,
GdkEventExpose *event)
{
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (GTK_WIDGET_DRAWABLE (widget))
{
gtk_menu_paint (widget, event);
(* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
}
return FALSE;
}
static void
gtk_menu_show (GtkWidget *widget)
{
GtkMenu *menu = GTK_MENU (widget);
_gtk_menu_refresh_accel_paths (menu, FALSE);
GTK_WIDGET_CLASS (parent_class)->show (widget);
}
static gboolean
gtk_menu_button_press (GtkWidget *widget,
GdkEventButton *event)
{
/* Don't pop down the menu for releases over scroll arrows
*/
if (GTK_IS_MENU (widget))
{
GtkMenu *menu = GTK_MENU (widget);
if (menu->upper_arrow_prelight || menu->lower_arrow_prelight)
return TRUE;
}
return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event);
}
static gboolean
gtk_menu_button_release (GtkWidget *widget,
GdkEventButton *event)
{
/* Don't pop down the menu for releases over scroll arrows
*/
if (GTK_IS_MENU (widget))
{
GtkMenu *menu = GTK_MENU (widget);
if (menu->upper_arrow_prelight || menu->lower_arrow_prelight)
return TRUE;
}
return GTK_WIDGET_CLASS (parent_class)->button_release_event (widget, event);
}
static gboolean
gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkMenuShell *menu_shell;
GtkMenu *menu;
gboolean delete = FALSE;
gboolean can_change_accels;
gchar *accel = NULL;
guint accel_key, accel_mods;
GdkModifierType consumed_modifiers;
GdkDisplay *display;
g_return_val_if_fail (GTK_IS_MENU (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
menu_shell = GTK_MENU_SHELL (widget);
menu = GTK_MENU (widget);
gtk_menu_stop_navigating_submenu (menu);
if (GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event))
return TRUE;
display = gtk_widget_get_display (widget);
g_object_get (gtk_widget_get_settings (widget),
"gtk-menu-bar-accel", &accel,
"gtk-can-change-accels", &can_change_accels,
NULL);
if (accel)
{
guint keyval = 0;
GdkModifierType mods = 0;
gboolean handled = FALSE;
gtk_accelerator_parse (accel, &keyval, &mods);
if (keyval == 0)
g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
/* FIXME this is wrong, needs to be in the global accel resolution
* thing, to properly consider i18n etc., but that probably requires
* AccelGroup changes etc.
*/
if (event->keyval == keyval &&
(mods & event->state) == mods)
{
g_signal_emit_by_name (menu, "cancel", 0);
}
g_free (accel);
if (handled)
return TRUE;
}
switch (event->keyval)
{
case GDK_Delete:
case GDK_KP_Delete:
case GDK_BackSpace:
delete = TRUE;
break;
default:
break;
}
/* Figure out what modifiers went into determining the key symbol */
gdk_keymap_translate_keyboard_state (gdk_keymap_get_for_display (display),
event->hardware_keycode, event->state, event->group,
NULL, NULL, NULL, &consumed_modifiers);
accel_key = gdk_keyval_to_lower (event->keyval);
accel_mods = event->state & gtk_accelerator_get_default_mod_mask () & ~consumed_modifiers;
/* If lowercasing affects the keysym, then we need to include SHIFT in the modifiers,
* We re-upper case when we match against the keyval, but display and save in caseless form.
*/
if (accel_key != event->keyval)
accel_mods |= GDK_SHIFT_MASK;
/* Modify the accelerators */
if (can_change_accels &&
menu_shell->active_menu_item &&
GTK_BIN (menu_shell->active_menu_item)->child && /* no separators */
GTK_MENU_ITEM (menu_shell->active_menu_item)->submenu == NULL && /* no submenus */
(delete || gtk_accelerator_valid (accel_key, accel_mods)))
{
GtkWidget *menu_item = menu_shell->active_menu_item;
gboolean locked, replace_accels = TRUE;
const gchar *path;
path = _gtk_widget_get_accel_path (menu_item, &locked);
if (!path || locked)
{
/* can't change accelerators on menu_items without paths
* (basically, those items are accelerator-locked).
*/
/* g_print("item has no path or is locked, menu prefix: %s\n", menu->accel_path); */
gdk_display_beep (display);
}
else
{
gboolean changed;
/* For the keys that act to delete the current setting, we delete
* the current setting if there is one, otherwise, we set the
* key as the accelerator.
*/
if (delete)
{
GtkAccelKey key;
if (gtk_accel_map_lookup_entry (path, &key) &&
(key.accel_key || key.accel_mods))
{
accel_key = 0;
accel_mods = 0;
}
}
changed = gtk_accel_map_change_entry (path, accel_key, accel_mods, replace_accels);
if (!changed)
{
/* we failed, probably because this key is in use and
* locked already
*/
/* g_print("failed to change\n"); */
gdk_display_beep (display);
}
}
}
return TRUE;
}
static gboolean
gtk_menu_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkWidget *menu_item;
GtkMenu *menu;
GtkMenuShell *menu_shell;
gboolean need_enter;
if (GTK_IS_MENU (widget))
gtk_menu_handle_scrolling (GTK_MENU (widget), 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);
if (!menu_item || !GTK_IS_MENU_ITEM (menu_item) ||
!_gtk_menu_item_is_selectable (menu_item) ||
!GTK_IS_MENU (menu_item->parent))
return FALSE;
menu_shell = GTK_MENU_SHELL (menu_item->parent);
menu = GTK_MENU (menu_shell);
need_enter = (menu->navigation_region != NULL || menu_shell->ignore_enter);
/* 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;
if (need_enter)
{
/* The menu is now sensitive to enter events on its items, but
* was previously sensitive. So we fake an enter event.
*/
gint width, height;
menu_shell->ignore_enter = FALSE;
gdk_drawable_get_size (event->window, &width, &height);
if (event->x >= 0 && event->x < width &&
event->y >= 0 && event->y < height)
{
GdkEvent *send_event = gdk_event_new (GDK_ENTER_NOTIFY);
gboolean result;
send_event->crossing.window = g_object_ref (event->window);
send_event->crossing.time = event->time;
send_event->crossing.send_event = TRUE;
send_event->crossing.x_root = event->x_root;
send_event->crossing.y_root = event->y_root;
send_event->crossing.x = event->x;
send_event->crossing.y = event->y;
/* We send the event to 'widget', the currently active menu,
* instead of 'menu', the menu that the pointer is in. This
* will ensure that the event will be ignored unless the
* menuitem is a child of the active menu or some parent
* menu of the active menu.
*/
result = gtk_widget_event (widget, send_event);
gdk_event_free (send_event);
return result;
}
}
return FALSE;
}
static gboolean
gtk_menu_scroll_timeout (gpointer data)
{
GtkMenu *menu;
GtkWidget *widget;
gint offset;
gint view_width, view_height;
GDK_THREADS_ENTER ();
menu = GTK_MENU (data);
widget = GTK_WIDGET (menu);
offset = menu->scroll_offset + menu->scroll_step;
/* If we scroll upward and the non-visible top part
* is smaller than the scroll arrow it would be
* pretty stupid to show the arrow and taking more
* screen space than just scrolling to the top.
*/
if ((menu->scroll_step < 0) && (offset < MENU_SCROLL_ARROW_HEIGHT))
offset = 0;
/* Don't scroll over the top if we weren't before: */
if ((menu->scroll_offset >= 0) && (offset < 0))
offset = 0;
gdk_drawable_get_size (widget->window, &view_width, &view_height);
/* Don't scroll past the bottom if we weren't before: */
if (menu->scroll_offset > 0)
view_height -= MENU_SCROLL_ARROW_HEIGHT;
if ((menu->scroll_offset + view_height <= widget->requisition.height) &&
(offset + view_height > widget->requisition.height))
offset = widget->requisition.height - view_height;
gtk_menu_scroll_to (menu, offset);
GDK_THREADS_LEAVE ();
return TRUE;
}
static void
gtk_menu_handle_scrolling (GtkMenu *menu, gboolean enter)
{
GtkMenuShell *menu_shell;
gint width, height;
gint x, y;
gint border;
GdkRectangle rect;
gboolean in_arrow;
gboolean scroll_fast = FALSE;
guint vertical_padding;
menu_shell = GTK_MENU_SHELL (menu);
gdk_window_get_pointer (GTK_WIDGET (menu)->window, &x, &y, NULL);
gdk_drawable_get_size (GTK_WIDGET (menu)->window, &width, &height);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
border = GTK_CONTAINER (menu)->border_width +
GTK_WIDGET (menu)->style->ythickness + vertical_padding;
if (menu->upper_arrow_visible && !menu->tearoff_active)
{
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = MENU_SCROLL_ARROW_HEIGHT + border;
in_arrow = FALSE;
if ((x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
scroll_fast = (y < rect.y + MENU_SCROLL_FAST_ZONE);
}
if (enter && in_arrow &&
(!menu->upper_arrow_prelight || menu->scroll_fast != scroll_fast))
{
menu->upper_arrow_prelight = TRUE;
menu->scroll_fast = scroll_fast;
gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
/* Deselect the active item so that any submenus are poped down */
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
menu->scroll_step = (scroll_fast) ? -MENU_SCROLL_STEP2 : -MENU_SCROLL_STEP1;
menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout,
menu);
}
else if (!enter && !in_arrow && menu->upper_arrow_prelight)
{
gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
gtk_menu_stop_scrolling (menu);
}
}
if (menu->lower_arrow_visible && !menu->tearoff_active)
{
rect.x = 0;
rect.y = height - border - MENU_SCROLL_ARROW_HEIGHT;
rect.width = width;
rect.height = MENU_SCROLL_ARROW_HEIGHT + border;
in_arrow = FALSE;
if ((x >= rect.x) && (x < rect.x + rect.width) &&
(y >= rect.y) && (y < rect.y + rect.height))
{
in_arrow = TRUE;
scroll_fast = (y > rect.y + rect.height - MENU_SCROLL_FAST_ZONE);
}
if (enter && in_arrow &&
(!menu->lower_arrow_prelight || menu->scroll_fast != scroll_fast))
{
menu->lower_arrow_prelight = TRUE;
menu->scroll_fast = scroll_fast;
gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
/* Deselect the active item so that any submenus are poped down */
gtk_menu_shell_deselect (menu_shell);
gtk_menu_remove_scroll_timeout (menu);
menu->scroll_step = (scroll_fast) ? MENU_SCROLL_STEP2 : MENU_SCROLL_STEP1;
menu->timeout_id = g_timeout_add ((scroll_fast) ? MENU_SCROLL_TIMEOUT2 : MENU_SCROLL_TIMEOUT1,
gtk_menu_scroll_timeout,
menu);
}
else if (!enter && !in_arrow && menu->lower_arrow_prelight)
{
gdk_window_invalidate_rect (GTK_WIDGET (menu)->window, &rect, FALSE);
gtk_menu_stop_scrolling (menu);
}
}
}
static gboolean
gtk_menu_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkWidget *menu_item;
if (widget && GTK_IS_MENU (widget))
{
GtkMenuShell *menu_shell = GTK_MENU_SHELL (widget);
if (!menu_shell->ignore_enter)
gtk_menu_handle_scrolling (GTK_MENU (widget), TRUE);
}
/* If this is a faked enter (see gtk_menu_motion_notify), 'widget'
* will not correspond to the event widget's parent. Check to see
* if we are in the parent's navigation region.
*/
menu_item = gtk_get_event_widget ((GdkEvent*) event);
if (menu_item && GTK_IS_MENU_ITEM (menu_item) && GTK_IS_MENU (menu_item->parent) &&
gtk_menu_navigating_submenu (GTK_MENU (menu_item->parent), event->x_root, event->y_root))
return TRUE;
return GTK_WIDGET_CLASS (parent_class)->enter_notify_event (widget, event);
}
static gboolean
gtk_menu_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkMenuShell *menu_shell;
GtkMenu *menu;
GtkMenuItem *menu_item;
GtkWidget *event_widget;
menu = GTK_MENU (widget);
menu_shell = GTK_MENU_SHELL (widget);
if (gtk_menu_navigating_submenu (menu, event->x_root, event->y_root))
return TRUE;
gtk_menu_handle_scrolling (menu, FALSE);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
if (!event_widget || !GTK_IS_MENU_ITEM (event_widget))
return TRUE;
menu_item = GTK_MENU_ITEM (event_widget);
/* Here we check to see if we're leaving an active menu item with a submenu,
* in which case we enter submenu navigation mode.
*/
if (menu_shell->active_menu_item != NULL
&& menu_item->submenu != NULL
&& menu_item->submenu_placement == GTK_LEFT_RIGHT)
{
if (GTK_MENU_SHELL (menu_item->submenu)->active)
{
gtk_menu_set_submenu_navigation_region (menu, menu_item, event);
return TRUE;
}
}
return GTK_WIDGET_CLASS (parent_class)->leave_notify_event (widget, event);
}
static void
gtk_menu_stop_navigating_submenu (GtkMenu *menu)
{
if (menu->navigation_region)
{
gdk_region_destroy (menu->navigation_region);
menu->navigation_region = NULL;
}
if (menu->navigation_timeout)
{
g_source_remove (menu->navigation_timeout);
menu->navigation_timeout = 0;
}
}
/* When the timeout is elapsed, the navigation region is destroyed
* and the menuitem under the pointer (if any) is selected.
*/
static gboolean
gtk_menu_stop_navigating_submenu_cb (gpointer user_data)
{
GtkMenu *menu = user_data;
GdkWindow *child_window;
GDK_THREADS_ENTER ();
gtk_menu_stop_navigating_submenu (menu);
if (GTK_WIDGET_REALIZED (menu))
{
child_window = gdk_window_get_pointer (menu->bin_window, NULL, NULL, NULL);
if (child_window)
{
GdkEvent *send_event = gdk_event_new (GDK_ENTER_NOTIFY);
send_event->crossing.window = g_object_ref (child_window);
send_event->crossing.time = GDK_CURRENT_TIME; /* Bogus */
send_event->crossing.send_event = TRUE;
GTK_WIDGET_CLASS (parent_class)->enter_notify_event (GTK_WIDGET (menu), (GdkEventCrossing *)send_event);
gdk_event_free (send_event);
}
}
GDK_THREADS_LEAVE ();
return FALSE;
}
static gboolean
gtk_menu_navigating_submenu (GtkMenu *menu,
gint event_x,
gint event_y)
{
if (menu->navigation_region)
{
if (gdk_region_point_in (menu->navigation_region, event_x, event_y))
return TRUE;
else
{
gtk_menu_stop_navigating_submenu (menu);
return FALSE;
}
}
return FALSE;
}
#undef DRAW_STAY_UP_TRIANGLE
#ifdef DRAW_STAY_UP_TRIANGLE
static void
draw_stay_up_triangle (GdkWindow *window,
GdkRegion *region)
{
/* Draw ugly color all over the stay-up triangle */
GdkColor ugly_color = { 0, 50000, 10000, 10000 };
GdkGCValues gc_values;
GdkGC *ugly_gc;
GdkRectangle clipbox;
gc_values.subwindow_mode = GDK_INCLUDE_INFERIORS;
ugly_gc = gdk_gc_new_with_values (window, &gc_values, 0 | GDK_GC_SUBWINDOW);
gdk_gc_set_rgb_fg_color (ugly_gc, &ugly_color);
gdk_gc_set_clip_region (ugly_gc, region);
gdk_region_get_clipbox (region, &clipbox);
gdk_draw_rectangle (window,
ugly_gc,
TRUE,
clipbox.x, clipbox.y,
clipbox.width, clipbox.height);
g_object_unref (ugly_gc);
}
#endif
static GdkRegion *
flip_region (GdkRegion *region,
gboolean flip_x,
gboolean flip_y)
{
gint n_rectangles;
GdkRectangle *rectangles;
GdkRectangle clipbox;
GdkRegion *new_region;
gint i;
new_region = gdk_region_new ();
gdk_region_get_rectangles (region, &rectangles, &n_rectangles);
gdk_region_get_clipbox (region, &clipbox);
for (i = 0; i < n_rectangles; ++i)
{
GdkRectangle rect = rectangles[i];
if (flip_y)
rect.y -= 2 * (rect.y - clipbox.y) + rect.height;
if (flip_x)
rect.x -= 2 * (rect.x - clipbox.x) + rect.width;
gdk_region_union_with_rect (new_region, &rect);
}
g_free (rectangles);
return new_region;
}
static void
gtk_menu_set_submenu_navigation_region (GtkMenu *menu,
GtkMenuItem *menu_item,
GdkEventCrossing *event)
{
gint submenu_left = 0;
gint submenu_right = 0;
gint submenu_top = 0;
gint submenu_bottom = 0;
gint width = 0;
gint height = 0;
GdkPoint point[3];
GtkWidget *event_widget;
g_return_if_fail (menu_item->submenu != NULL);
g_return_if_fail (event != NULL);
event_widget = gtk_get_event_widget ((GdkEvent*) event);
gdk_window_get_origin (menu_item->submenu->window, &submenu_left, &submenu_top);
gdk_drawable_get_size (menu_item->submenu->window, &width, &height);
submenu_right = submenu_left + width;
submenu_bottom = submenu_top + height;
gdk_drawable_get_size (event_widget->window, &width, &height);
if (event->x >= 0 && event->x < width)
{
gint popdown_delay;
gboolean flip_y = FALSE;
gboolean flip_x = FALSE;
gtk_menu_stop_navigating_submenu (menu);
if (menu_item->submenu_direction == GTK_DIRECTION_RIGHT)
{
/* right */
point[0].x = event->x_root;
point[1].x = submenu_left;
}
else
{
/* left */
point[0].x = event->x_root + 1;
point[1].x = 2 * (event->x_root + 1) - submenu_right;
flip_x = TRUE;
}
if (event->y < 0)
{
/* top */
point[0].y = event->y_root + 1;
point[1].y = 2 * (event->y_root + 1) - submenu_top + NAVIGATION_REGION_OVERSHOOT;
if (point[0].y >= point[1].y - NAVIGATION_REGION_OVERSHOOT)
return;
flip_y = TRUE;
}
else
{
/* bottom */
point[0].y = event->y_root;
point[1].y = submenu_bottom + NAVIGATION_REGION_OVERSHOOT;
if (point[0].y >= submenu_bottom)
return;
}
point[2].x = point[1].x;
point[2].y = point[0].y;
menu->navigation_region = gdk_region_polygon (point, 3, GDK_WINDING_RULE);
if (flip_x || flip_y)
{
GdkRegion *new_region = flip_region (menu->navigation_region, flip_x, flip_y);
gdk_region_destroy (menu->navigation_region);
menu->navigation_region = new_region;
}
g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu)),
"gtk-menu-popdown-delay", &popdown_delay,
NULL);
menu->navigation_timeout = g_timeout_add (popdown_delay,
gtk_menu_stop_navigating_submenu_cb, menu);
#ifdef DRAW_STAY_UP_TRIANGLE
draw_stay_up_triangle (gdk_get_default_root_window(),
menu->navigation_region);
#endif
}
}
static void
gtk_menu_deactivate (GtkMenuShell *menu_shell)
{
GtkWidget *parent;
g_return_if_fail (GTK_IS_MENU (menu_shell));
parent = menu_shell->parent_menu_shell;
menu_shell->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 (GtkMenu *menu)
{
GtkWidget *widget;
GtkRequisition requisition;
GtkMenuPrivate *private;
gint x, y;
gint scroll_offset;
gint menu_height;
gboolean push_in;
GdkScreen *screen;
GdkScreen *pointer_screen;
GdkRectangle monitor;
gint monitor_num;
g_return_if_fail (GTK_IS_MENU (menu));
widget = GTK_WIDGET (menu);
screen = gtk_widget_get_screen (widget);
gdk_display_get_pointer (gdk_screen_get_display (screen),
&pointer_screen, &x, &y, NULL);
/* We need the requisition to figure out the right place to
* popup the menu. In fact, we always need to ask here, since
* if a size_request was queued while we weren't popped up,
* the requisition won't have been recomputed yet.
*/
gtk_widget_size_request (widget, &requisition);
if (pointer_screen != screen)
{
/* Pointer is on a different screen; roughly center the
* menu on the screen. If someone was using multiscreen
* + Xinerama together they'd probably want something
* fancier; but that is likely to be vanishingly rare.
*/
x = MAX (0, (gdk_screen_get_width (screen) - requisition.width) / 2);
y = MAX (0, (gdk_screen_get_height (screen) - requisition.height) / 2);
}
monitor_num = gdk_screen_get_monitor_at_point (screen, x, y);
gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
push_in = FALSE;
if (menu->position_func)
(* menu->position_func) (menu, &x, &y, &push_in, menu->position_func_data);
else
{
gint space_left, space_right, space_above, space_below;
gint needed_width;
gint needed_height;
gint xthickness = widget->style->xthickness;
gint ythickness = widget->style->ythickness;
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.
*/
space_left = x - monitor.x;
space_right = monitor.x + monitor.width - x - 1;
space_above = y - monitor.y;
space_below = monitor.y + monitor.height - y - 1;
/* position horizontally */
/* the amount of space we need to position the menu. Note the
* menu is offset "xthickness" pixels
*/
needed_width = requisition.width - xthickness;
if (needed_width <= space_left ||
needed_width <= space_right)
{
if ((rtl && needed_width <= space_left) ||
(!rtl && needed_width > space_right))
{
/* position left */
x = x + xthickness - requisition.width + 1;
}
else
{
/* position right */
x = x - xthickness;
}
/* x is clamped on-screen further down */
}
else if (requisition.width <= monitor.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 = monitor.x;
}
else
{
/* right justify */
x = monitor.x + monitor.width - requisition.width;
}
}
else /* menu is simply too big for the monitor */
{
if (rtl)
{
/* right justify */
x = monitor.x + monitor.width - requisition.width;
}
else
{
/* left justify */
x = monitor.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 - ythickness;
if (needed_height <= space_above ||
needed_height <= space_below)
{
if (needed_height <= space_below)
y = y - ythickness;
else
y = y + ythickness - requisition.height + 1;
y = CLAMP (y, monitor.y,
monitor.y + monitor.height - requisition.height);
}
else if (needed_height > space_below && needed_height > space_above)
{
if (space_below >= space_above)
y = monitor.y + monitor.height - requisition.height;
else
y = monitor.y;
}
else
{
y = monitor.y;
}
}
scroll_offset = 0;
if (push_in)
{
menu_height = GTK_WIDGET (menu)->requisition.height;
if (y + menu_height > monitor.y + monitor.height)
{
scroll_offset -= y + menu_height - (monitor.y + monitor.height);
y = (monitor.y + monitor.height) - menu_height;
}
if (y < monitor.y)
{
scroll_offset += monitor.y - y;
y = monitor.y;
}
}
/* FIXME: should this be done in the various position_funcs ? */
x = CLAMP (x, monitor.x, MAX (monitor.x, monitor.x + monitor.width - requisition.width));
if (GTK_MENU_SHELL (menu)->active)
{
private = gtk_menu_get_private (menu);
private->have_position = TRUE;
private->x = x;
private->y = y;
}
if (y + requisition.height > monitor.y + monitor.height)
requisition.height = (monitor.y + monitor.height) - y;
if (y < monitor.y)
{
scroll_offset += monitor.y - y;
requisition.height -= monitor.y - y;
y = monitor.y;
}
if (scroll_offset > 0)
scroll_offset += MENU_SCROLL_ARROW_HEIGHT;
gtk_window_move (GTK_WINDOW (GTK_MENU_SHELL (menu)->active ? menu->toplevel : menu->tearoff_window),
x, y);
if (!GTK_MENU_SHELL (menu)->active)
{
gtk_window_resize (GTK_WINDOW (menu->tearoff_window),
requisition.width, requisition.height);
}
menu->scroll_offset = scroll_offset;
}
static void
gtk_menu_remove_scroll_timeout (GtkMenu *menu)
{
if (menu->timeout_id)
{
g_source_remove (menu->timeout_id);
menu->timeout_id = 0;
}
}
static void
gtk_menu_stop_scrolling (GtkMenu *menu)
{
gtk_menu_remove_scroll_timeout (menu);
menu->upper_arrow_prelight = FALSE;
menu->lower_arrow_prelight = FALSE;
}
static void
gtk_menu_scroll_to (GtkMenu *menu,
gint offset)
{
GtkWidget *widget;
gint x, y;
gint view_width, view_height;
gint border_width;
gboolean last_visible;
gint menu_height;
guint vertical_padding;
widget = GTK_WIDGET (menu);
if (menu->tearoff_active &&
menu->tearoff_adjustment &&
(menu->tearoff_adjustment->value != offset))
{
menu->tearoff_adjustment->value =
CLAMP (offset,
0, menu->tearoff_adjustment->upper - menu->tearoff_adjustment->page_size);
gtk_adjustment_value_changed (menu->tearoff_adjustment);
}
/* Move/resize the viewport according to arrows: */
view_width = widget->allocation.width;
view_height = widget->allocation.height;
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
border_width = GTK_CONTAINER (menu)->border_width;
view_width -= (border_width + widget->style->xthickness) * 2;
view_height -= (border_width + widget->style->ythickness + vertical_padding) * 2;
menu_height = widget->requisition.height -
(border_width + widget->style->ythickness + vertical_padding) * 2;
x = border_width + widget->style->xthickness;
y = border_width + widget->style->ythickness + vertical_padding;
if (!menu->tearoff_active)
{
last_visible = menu->upper_arrow_visible;
menu->upper_arrow_visible = offset > 0;
if (menu->upper_arrow_visible)
view_height -= MENU_SCROLL_ARROW_HEIGHT;
if ( (last_visible != menu->upper_arrow_visible) &&
!menu->upper_arrow_visible)
{
menu->upper_arrow_prelight = FALSE;
/* If we hid the upper arrow, possibly remove timeout */
if (menu->scroll_step < 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
last_visible = menu->lower_arrow_visible;
menu->lower_arrow_visible = offset < menu_height - view_height;
if (menu->lower_arrow_visible)
view_height -= MENU_SCROLL_ARROW_HEIGHT;
if ( (last_visible != menu->lower_arrow_visible) &&
!menu->lower_arrow_visible)
{
menu->lower_arrow_prelight = FALSE;
/* If we hid the lower arrow, possibly remove timeout */
if (menu->scroll_step > 0)
{
gtk_menu_stop_scrolling (menu);
gtk_widget_queue_draw (GTK_WIDGET (menu));
}
}
if (menu->upper_arrow_visible)
y += MENU_SCROLL_ARROW_HEIGHT;
}
/* Scroll the menu: */
if (GTK_WIDGET_REALIZED (menu))
gdk_window_move (menu->bin_window, 0, -offset);
if (GTK_WIDGET_REALIZED (menu))
gdk_window_move_resize (menu->view_window,
x,
y,
view_width,
view_height);
menu->scroll_offset = offset;
}
static gboolean
compute_child_offset (GtkMenu *menu,
GtkWidget *menu_item,
gint *offset,
gint *height,
gboolean *is_last_child)
{
GtkMenuPrivate *priv = gtk_menu_get_private (menu);
guint item_top_attach;
guint item_bottom_attach;
gint child_offset = 0;
gint i;
gtk_container_child_get (GTK_CONTAINER (menu), menu_item,
"top_attach", &item_top_attach,
"bottom_attach", &item_bottom_attach,
NULL);
/* there is a possibility that we get called before _size_request, so
* check the height table for safety.
*/
if (!priv->heights || priv->heights_length < priv->rows)
return FALSE;
/* when we have a row with only invisible children, it's 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 == priv->rows);
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;
gint child_offset, child_height;
gint width, height;
gint y;
gint arrow_height;
gboolean last_child = 0;
menu = GTK_MENU (menu_shell);
/* 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))
{
guint vertical_padding;
y = menu->scroll_offset;
gdk_drawable_get_size (GTK_WIDGET (menu)->window, &width, &height);
gtk_widget_style_get (GTK_WIDGET (menu),
"vertical-padding", &vertical_padding,
NULL);
height -= 2*GTK_CONTAINER (menu)->border_width + 2*GTK_WIDGET (menu)->style->ythickness + 2*vertical_padding;
if (child_offset < y)
{
/* Ignore the enter event we might get if the pointer is on the menu
*/
menu_shell->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, child_offset);
}
else
{
arrow_height = 0;
if (menu->upper_arrow_visible && !menu->tearoff_active)
arrow_height += MENU_SCROLL_ARROW_HEIGHT;
if (menu->lower_arrow_visible && !menu->tearoff_active)
arrow_height += MENU_SCROLL_ARROW_HEIGHT;
if (child_offset + child_height > y + height - arrow_height)
{
arrow_height = 0;
if (!last_child && !menu->tearoff_active)
arrow_height += MENU_SCROLL_ARROW_HEIGHT;
y = child_offset + child_height - height + arrow_height;
if ((y > 0) && !menu->tearoff_active)
{
/* Need upper arrow */
arrow_height += MENU_SCROLL_ARROW_HEIGHT;
y = child_offset + child_height - height + arrow_height;
}
/* Ignore the enter event we might get if the pointer is on the menu
*/
menu_shell->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_REALIZED (GTK_WIDGET (menu)))
gtk_menu_scroll_item_visible (menu_shell, menu_item);
GTK_MENU_SHELL_CLASS (parent_class)->select_item (menu_shell, menu_item);
}
/* Reparent the menu, taking care of the refcounting
*
* If unrealize is true we force a unrealize while reparenting the parent.
* This can help eliminate flicker in some cases.
*
* What happens is that when the menu is unrealized and then re-realized,
* the allocations are as follows:
*
* parent - 1x1 at (0,0)
* child1 - 100x20 at (0,0)
* child2 - 100x20 at (0,20)
* child3 - 100x20 at (0,40)
*
* That is, the parent is small but the children are full sized. Then,
* when the queued_resize gets processed, the parent gets resized to
* full size.
*
* But in order to eliminate flicker when scrolling, gdkgeometry-x11.c
* contains the following logic:
*
* - if a move or resize operation on a window would change the clip
* region on the children, then before the window is resized
* the background for children is temporarily set to None, the
* move/resize done, and the background for the children restored.
*
* So, at the point where the parent is resized to final size, the
* background for the children is temporarily None, and thus they
* are not cleared to the background color and the previous background
* (the image of the menu) is left in place.
*/
static void
gtk_menu_reparent (GtkMenu *menu,
GtkWidget *new_parent,
gboolean unrealize)
{
GtkObject *object = GTK_OBJECT (menu);
GtkWidget *widget = GTK_WIDGET (menu);
gboolean was_floating = GTK_OBJECT_FLOATING (object);
g_object_ref (object);
gtk_object_sink (object);
if (unrealize)
{
g_object_ref (object);
gtk_container_remove (GTK_CONTAINER (widget->parent), widget);
gtk_container_add (GTK_CONTAINER (new_parent), widget);
g_object_unref (object);
}
else
gtk_widget_reparent (GTK_WIDGET (menu), new_parent);
if (was_floating)
GTK_OBJECT_SET_FLAGS (object, GTK_FLOATING);
else
g_object_unref (object);
}
static void
gtk_menu_show_all (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_MENU (widget));
/* Show children, but not self. */
gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL);
}
static void
gtk_menu_hide_all (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_MENU (widget));
/* Hide children, but not self. */
gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_hide_all, NULL);
}
/**
* gtk_menu_set_screen:
* @menu: a #GtkMenu.
* @screen: 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 || GDK_IS_SCREEN (screen));
g_object_set_data (G_OBJECT (menu), "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).
*
* Since: 2.4
**/
void
gtk_menu_attach (GtkMenu *menu,
GtkWidget *child,
guint left_attach,
guint right_attach,
guint top_attach,
guint bottom_attach)
{
g_return_if_fail (GTK_IS_MENU (menu));
g_return_if_fail (GTK_IS_MENU_ITEM (child));
g_return_if_fail (left_attach < right_attach);
g_return_if_fail (top_attach < bottom_attach);
if (!child->parent)
gtk_menu_shell_append (GTK_MENU_SHELL (menu), child);
gtk_container_child_set (GTK_CONTAINER (menu), 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)
{
gint popup_delay;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu_shell)),
"gtk-menu-popup-delay", &popup_delay,
NULL);
return 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->children; list; list = list->next)
{
guint l, r, t, b;
if (!_gtk_menu_item_is_selectable (list->data))
continue;
get_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)
{
GtkMenuPrivate *priv = gtk_menu_get_private (GTK_MENU (menu_shell));
/* use special table menu key bindings */
if (menu_shell->active_menu_item && priv->columns > 1)
{
int i;
guint l, r, t, b;
gboolean rtl = (gtk_widget_get_direction (GTK_WIDGET (menu_shell)) == GTK_TEXT_DIR_RTL);
GtkWidget *match = NULL;
get_child_attach (menu_shell->active_menu_item, &l, &r, &t, &b);
if (direction == GTK_MENU_DIR_NEXT)
{
for (i = b; i < priv->rows; 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 = priv->rows; i > b; i--)
{
match = find_child_containing (menu_shell,
l, l + 1, i - 1, i);
if (match)
break;
}
}
}
else if ((!rtl && direction == GTK_MENU_DIR_PARENT)
|| (rtl && direction == GTK_MENU_DIR_CHILD))
{
/* 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->parent_menu_shell;
if (!parent
|| g_list_length (GTK_MENU_SHELL (parent)->children) <= 1)
match = menu_shell->active_menu_item;
}
}
else if ((!rtl && direction == GTK_MENU_DIR_CHILD)
|| (rtl && direction == GTK_MENU_DIR_PARENT))
{
/* we go one right if possible */
if (r < priv->columns)
match = find_child_containing (menu_shell, r, r + 1, t, t + 1);
if (!match)
{
GtkWidget *parent = menu_shell->parent_menu_shell;
if (! GTK_MENU_ITEM (menu_shell->active_menu_item)->submenu &&
(!parent ||
g_list_length (GTK_MENU_SHELL (parent)->children) <= 1))
match = menu_shell->active_menu_item;
}
}
if (match)
{
gtk_menu_shell_select_item (menu_shell, match);
return;
}
}
GTK_MENU_SHELL_CLASS (parent_class)->move_current (menu_shell, direction);
}
static gint
get_visible_size (GtkMenu *menu)
{
GtkWidget *widget = GTK_WIDGET (menu);
GtkContainer *container = GTK_CONTAINER (menu);
gint menu_height = (widget->allocation.height
- 2 * (container->border_width
+ widget->style->ythickness));
if (menu->upper_arrow_visible && !menu->tearoff_active)
menu_height -= MENU_SCROLL_ARROW_HEIGHT;
if (menu->lower_arrow_visible && !menu->tearoff_active)
menu_height -= MENU_SCROLL_ARROW_HEIGHT;
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)
{
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 = menu->scroll_offset;
upper = menu->scroll_offset + menu_height;
for (children = menu_shell->children; children; children = children->next)
{
if (GTK_WIDGET_VISIBLE (children->data))
{
GtkRequisition child_requisition;
gtk_widget_size_request (children->data, &child_requisition);
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 &&
!GTK_IS_TEAROFF_MENU_ITEM (child))
return child;
}
child_offset += child_requisition.height;
}
}
return child;
}
static gint
get_menu_height (GtkMenu *menu)
{
gint height;
GtkWidget *widget = GTK_WIDGET (menu);
height = widget->requisition.height;
height -= (GTK_CONTAINER (widget)->border_width + widget->style->ythickness) * 2;
if (menu->upper_arrow_visible && !menu->tearoff_active)
height -= MENU_SCROLL_ARROW_HEIGHT;
if (menu->lower_arrow_visible && !menu->tearoff_active)
height -= MENU_SCROLL_ARROW_HEIGHT;
return height;
}
static void
gtk_menu_real_move_scroll (GtkMenu *menu,
GtkScrollType type)
{
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->active_menu_item)
{
gint child_height;
compute_child_offset (menu, menu_shell->active_menu_item,
&child_offset, &child_height, NULL);
child_offset += child_height / 2;
}
menu_shell->ignore_enter = TRUE;
old_upper_arrow_visible = menu->upper_arrow_visible && !menu->tearoff_active;
old_offset = menu->scroll_offset;
new_offset = menu->scroll_offset + step;
new_offset = CLAMP (new_offset, 0, end_position - page_size);
gtk_menu_scroll_to (menu, new_offset);
if (menu_shell->active_menu_item)
{
GtkWidget *new_child;
gboolean new_upper_arrow_visible = menu->upper_arrow_visible && !menu->tearoff_active;
if (menu->scroll_offset != old_offset)
step = menu->scroll_offset - old_offset;
step -= (new_upper_arrow_visible - old_upper_arrow_visible) * MENU_SCROLL_ARROW_HEIGHT;
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->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, 0);
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->ignore_enter = TRUE;
gtk_menu_scroll_to (menu, end_position - page_size);
_gtk_menu_shell_select_last (menu_shell, TRUE);
break;
default:
break;
}
}
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