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gtk2/gtk/gtkwidget.c
Matthias Clasen 2074c53819 More formatting fixes for docs.
2003-06-29 21:16:06 +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/.
*/
#include <stdarg.h>
#include <string.h>
#include <locale.h>
#include "gtkcontainer.h"
#include "gtkaccelmap.h"
#include "gtkclipboard.h"
#include "gtkiconfactory.h"
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkrc.h"
#include "gtkselection.h"
#include "gtksettings.h"
#include "gtksizegroup.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtkbindings.h"
#include "gtkprivate.h"
#include "gdk/gdk.h"
#include "gdk/gdkprivate.h" /* Used in gtk_reset_shapes_recurse to avoid copy */
#include <gobject/gvaluecollector.h>
#include <gobject/gobjectnotifyqueue.c>
#include "gdk/gdkkeysyms.h"
#include "gtkintl.h"
#include "gtkaccessible.h"
#include "gtktooltips.h"
#include "gtkinvisible.h"
#define WIDGET_CLASS(w) GTK_WIDGET_GET_CLASS (w)
#define INIT_PATH_SIZE (512)
enum {
SHOW,
HIDE,
MAP,
UNMAP,
REALIZE,
UNREALIZE,
SIZE_REQUEST,
SIZE_ALLOCATE,
STATE_CHANGED,
PARENT_SET,
HIERARCHY_CHANGED,
STYLE_SET,
DIRECTION_CHANGED,
GRAB_NOTIFY,
CHILD_NOTIFY,
MNEMONIC_ACTIVATE,
GRAB_FOCUS,
FOCUS,
EVENT,
EVENT_AFTER,
BUTTON_PRESS_EVENT,
BUTTON_RELEASE_EVENT,
SCROLL_EVENT,
MOTION_NOTIFY_EVENT,
DELETE_EVENT,
DESTROY_EVENT,
EXPOSE_EVENT,
KEY_PRESS_EVENT,
KEY_RELEASE_EVENT,
ENTER_NOTIFY_EVENT,
LEAVE_NOTIFY_EVENT,
CONFIGURE_EVENT,
FOCUS_IN_EVENT,
FOCUS_OUT_EVENT,
MAP_EVENT,
UNMAP_EVENT,
PROPERTY_NOTIFY_EVENT,
SELECTION_CLEAR_EVENT,
SELECTION_REQUEST_EVENT,
SELECTION_NOTIFY_EVENT,
SELECTION_GET,
SELECTION_RECEIVED,
PROXIMITY_IN_EVENT,
PROXIMITY_OUT_EVENT,
DRAG_BEGIN,
DRAG_END,
DRAG_DATA_DELETE,
DRAG_LEAVE,
DRAG_MOTION,
DRAG_DROP,
DRAG_DATA_GET,
DRAG_DATA_RECEIVED,
CLIENT_EVENT,
NO_EXPOSE_EVENT,
VISIBILITY_NOTIFY_EVENT,
WINDOW_STATE_EVENT,
POPUP_MENU,
SHOW_HELP,
ACCEL_CLOSURES_CHANGED,
SCREEN_CHANGED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_NAME,
PROP_PARENT,
PROP_WIDTH_REQUEST,
PROP_HEIGHT_REQUEST,
PROP_VISIBLE,
PROP_SENSITIVE,
PROP_APP_PAINTABLE,
PROP_CAN_FOCUS,
PROP_HAS_FOCUS,
PROP_IS_FOCUS,
PROP_CAN_DEFAULT,
PROP_HAS_DEFAULT,
PROP_RECEIVES_DEFAULT,
PROP_COMPOSITE_CHILD,
PROP_STYLE,
PROP_EVENTS,
PROP_EXTENSION_EVENTS
};
typedef struct _GtkStateData GtkStateData;
struct _GtkStateData
{
GtkStateType state;
guint state_restoration : 1;
guint parent_sensitive : 1;
guint use_forall : 1;
};
/* --- prototypes --- */
static void gtk_widget_class_init (GtkWidgetClass *klass);
static void gtk_widget_init (GtkWidget *widget);
static void gtk_widget_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_widget_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_widget_dispose (GObject *object);
static void gtk_widget_real_destroy (GtkObject *object);
static void gtk_widget_finalize (GObject *object);
static void gtk_widget_real_show (GtkWidget *widget);
static void gtk_widget_real_hide (GtkWidget *widget);
static void gtk_widget_real_map (GtkWidget *widget);
static void gtk_widget_real_unmap (GtkWidget *widget);
static void gtk_widget_real_realize (GtkWidget *widget);
static void gtk_widget_real_unrealize (GtkWidget *widget);
static void gtk_widget_real_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_widget_real_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_widget_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static void gtk_widget_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
static void gtk_widget_real_grab_focus (GtkWidget *focus_widget);
static gboolean gtk_widget_real_show_help (GtkWidget *widget,
GtkWidgetHelpType help_type);
static void gtk_widget_dispatch_child_properties_changed (GtkWidget *object,
guint n_pspecs,
GParamSpec **pspecs);
static gboolean gtk_widget_real_key_press_event (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_widget_real_key_release_event (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_widget_real_focus_in_event (GtkWidget *widget,
GdkEventFocus *event);
static gboolean gtk_widget_real_focus_out_event (GtkWidget *widget,
GdkEventFocus *event);
static gboolean gtk_widget_real_focus (GtkWidget *widget,
GtkDirectionType direction);
static PangoContext* gtk_widget_peek_pango_context (GtkWidget *widget);
static void gtk_widget_propagate_state (GtkWidget *widget,
GtkStateData *data);
static void gtk_widget_reset_rc_style (GtkWidget *widget);
static void gtk_widget_set_style_internal (GtkWidget *widget,
GtkStyle *style,
gboolean initial_emission);
static gint gtk_widget_event_internal (GtkWidget *widget,
GdkEvent *event);
static gboolean gtk_widget_real_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling);
static void gtk_widget_aux_info_destroy (GtkWidgetAuxInfo *aux_info);
static AtkObject* gtk_widget_real_get_accessible (GtkWidget *widget);
static void gtk_widget_accessible_interface_init (AtkImplementorIface *iface);
static AtkObject* gtk_widget_ref_accessible (AtkImplementor *implementor);
static void gtk_widget_invalidate_widget_windows (GtkWidget *widget,
GdkRegion *region);
static GdkScreen * gtk_widget_get_screen_unchecked (GtkWidget *widget);
static void gtk_widget_set_usize_internal (GtkWidget *widget,
gint width,
gint height);
/* --- variables --- */
static gpointer parent_class = NULL;
static guint widget_signals[LAST_SIGNAL] = { 0 };
static GMemChunk *aux_info_mem_chunk = NULL;
static GtkStyle *gtk_default_style = NULL;
static GSList *colormap_stack = NULL;
static guint composite_child_stack = 0;
static GtkTextDirection gtk_default_direction = GTK_TEXT_DIR_LTR;
static GParamSpecPool *style_property_spec_pool = NULL;
static GQuark quark_property_parser = 0;
static GQuark quark_aux_info = 0;
static GQuark quark_accel_path = 0;
static GQuark quark_accel_closures = 0;
static GQuark quark_event_mask = 0;
static GQuark quark_extension_event_mode = 0;
static GQuark quark_parent_window = 0;
static GQuark quark_shape_info = 0;
static GQuark quark_colormap = 0;
static GQuark quark_pango_context = 0;
static GQuark quark_rc_style = 0;
static GQuark quark_accessible_object = 0;
GParamSpecPool *_gtk_widget_child_property_pool = NULL;
GObjectNotifyContext *_gtk_widget_child_property_notify_context = NULL;
/* --- functions --- */
GType
gtk_widget_get_type (void)
{
static GType widget_type = 0;
if (!widget_type)
{
static const GTypeInfo widget_info =
{
sizeof (GtkWidgetClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_widget_class_init,
NULL, /* class_finalize */
NULL, /* class_init */
sizeof (GtkWidget),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_widget_init,
NULL, /* value_table */
};
static const GInterfaceInfo accessibility_info =
{
(GInterfaceInitFunc) gtk_widget_accessible_interface_init,
(GInterfaceFinalizeFunc) NULL,
NULL /* interface data */
};
widget_type = g_type_register_static (GTK_TYPE_OBJECT, "GtkWidget",
&widget_info, G_TYPE_FLAG_ABSTRACT);
g_type_add_interface_static (widget_type, ATK_TYPE_IMPLEMENTOR,
&accessibility_info) ;
}
return widget_type;
}
static void
child_property_notify_dispatcher (GObject *object,
guint n_pspecs,
GParamSpec **pspecs)
{
GTK_WIDGET_GET_CLASS (object)->dispatch_child_properties_changed (GTK_WIDGET (object), n_pspecs, pspecs);
}
static void
gtk_widget_class_init (GtkWidgetClass *klass)
{
static GObjectNotifyContext cpn_context = { 0, NULL, NULL };
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
GtkBindingSet *binding_set;
parent_class = g_type_class_peek_parent (klass);
quark_property_parser = g_quark_from_static_string ("gtk-rc-property-parser");
quark_aux_info = g_quark_from_static_string ("gtk-aux-info");
quark_accel_path = g_quark_from_static_string ("gtk-accel-path");
quark_accel_closures = g_quark_from_static_string ("gtk-accel-closures");
quark_event_mask = g_quark_from_static_string ("gtk-event-mask");
quark_extension_event_mode = g_quark_from_static_string ("gtk-extension-event-mode");
quark_parent_window = g_quark_from_static_string ("gtk-parent-window");
quark_shape_info = g_quark_from_static_string ("gtk-shape-info");
quark_colormap = g_quark_from_static_string ("gtk-colormap");
quark_pango_context = g_quark_from_static_string ("gtk-pango-context");
quark_rc_style = g_quark_from_static_string ("gtk-rc-style");
quark_accessible_object = g_quark_from_static_string ("gtk-accessible-object");
style_property_spec_pool = g_param_spec_pool_new (FALSE);
_gtk_widget_child_property_pool = g_param_spec_pool_new (TRUE);
cpn_context.quark_notify_queue = g_quark_from_static_string ("GtkWidget-child-property-notify-queue");
cpn_context.dispatcher = child_property_notify_dispatcher;
_gtk_widget_child_property_notify_context = &cpn_context;
gobject_class->dispose = gtk_widget_dispose;
gobject_class->finalize = gtk_widget_finalize;
gobject_class->set_property = gtk_widget_set_property;
gobject_class->get_property = gtk_widget_get_property;
object_class->destroy = gtk_widget_real_destroy;
klass->activate_signal = 0;
klass->set_scroll_adjustments_signal = 0;
klass->dispatch_child_properties_changed = gtk_widget_dispatch_child_properties_changed;
klass->show = gtk_widget_real_show;
klass->show_all = gtk_widget_show;
klass->hide = gtk_widget_real_hide;
klass->hide_all = gtk_widget_hide;
klass->map = gtk_widget_real_map;
klass->unmap = gtk_widget_real_unmap;
klass->realize = gtk_widget_real_realize;
klass->unrealize = gtk_widget_real_unrealize;
klass->size_request = gtk_widget_real_size_request;
klass->size_allocate = gtk_widget_real_size_allocate;
klass->state_changed = NULL;
klass->parent_set = NULL;
klass->hierarchy_changed = NULL;
klass->style_set = gtk_widget_style_set;
klass->direction_changed = gtk_widget_direction_changed;
klass->grab_notify = NULL;
klass->child_notify = NULL;
klass->mnemonic_activate = gtk_widget_real_mnemonic_activate;
klass->grab_focus = gtk_widget_real_grab_focus;
klass->focus = gtk_widget_real_focus;
klass->event = NULL;
klass->button_press_event = NULL;
klass->button_release_event = NULL;
klass->motion_notify_event = NULL;
klass->delete_event = NULL;
klass->destroy_event = NULL;
klass->expose_event = NULL;
klass->key_press_event = gtk_widget_real_key_press_event;
klass->key_release_event = gtk_widget_real_key_release_event;
klass->enter_notify_event = NULL;
klass->leave_notify_event = NULL;
klass->configure_event = NULL;
klass->focus_in_event = gtk_widget_real_focus_in_event;
klass->focus_out_event = gtk_widget_real_focus_out_event;
klass->map_event = NULL;
klass->unmap_event = NULL;
klass->window_state_event = NULL;
klass->property_notify_event = _gtk_selection_property_notify;
klass->selection_clear_event = gtk_selection_clear;
klass->selection_request_event = _gtk_selection_request;
klass->selection_notify_event = _gtk_selection_notify;
klass->selection_received = NULL;
klass->proximity_in_event = NULL;
klass->proximity_out_event = NULL;
klass->drag_begin = NULL;
klass->drag_end = NULL;
klass->drag_data_delete = NULL;
klass->drag_leave = NULL;
klass->drag_motion = NULL;
klass->drag_drop = NULL;
klass->drag_data_received = NULL;
klass->screen_changed = NULL;
klass->show_help = gtk_widget_real_show_help;
/* Accessibility support */
klass->get_accessible = gtk_widget_real_get_accessible;
klass->no_expose_event = NULL;
g_object_class_install_property (gobject_class,
PROP_NAME,
g_param_spec_string ("name",
_("Widget name"),
_("The name of the widget"),
NULL,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PARENT,
g_param_spec_object ("parent",
_("Parent widget"),
_("The parent widget of this widget. Must be a Container widget"),
GTK_TYPE_CONTAINER,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_WIDTH_REQUEST,
g_param_spec_int ("width_request",
_("Width request"),
_("Override for width request of the widget, or -1 if natural request should be used"),
-1,
G_MAXINT,
-1,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HEIGHT_REQUEST,
g_param_spec_int ("height_request",
_("Height request"),
_("Override for height request of the widget, or -1 if natural request should be used"),
-1,
G_MAXINT,
-1,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_VISIBLE,
g_param_spec_boolean ("visible",
_("Visible"),
_("Whether the widget is visible"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SENSITIVE,
g_param_spec_boolean ("sensitive",
_("Sensitive"),
_("Whether the widget responds to input"),
TRUE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_APP_PAINTABLE,
g_param_spec_boolean ("app_paintable",
_("Application paintable"),
_("Whether the application will paint directly on the widget"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_CAN_FOCUS,
g_param_spec_boolean ("can_focus",
_("Can focus"),
_("Whether the widget can accept the input focus"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HAS_FOCUS,
g_param_spec_boolean ("has_focus",
_("Has focus"),
_("Whether the widget has the input focus"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_IS_FOCUS,
g_param_spec_boolean ("is_focus",
_("Is focus"),
_("Whether the widget is the focus widget within the toplevel"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_CAN_DEFAULT,
g_param_spec_boolean ("can_default",
_("Can default"),
_("Whether the widget can be the default widget"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_HAS_DEFAULT,
g_param_spec_boolean ("has_default",
_("Has default"),
_("Whether the widget is the default widget"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_RECEIVES_DEFAULT,
g_param_spec_boolean ("receives_default",
_("Receives default"),
_("If TRUE, the widget will receive the default action when it is focused"),
FALSE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_COMPOSITE_CHILD,
g_param_spec_boolean ("composite_child",
_("Composite child"),
_("Whether the widget is part of a composite widget"),
FALSE,
G_PARAM_READABLE));
g_object_class_install_property (gobject_class,
PROP_STYLE,
g_param_spec_object ("style",
_("Style"),
_("The style of the widget, which contains information about how it will look (colors etc)"),
GTK_TYPE_STYLE,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_EVENTS,
g_param_spec_flags ("events",
_("Events"),
_("The event mask that decides what kind of GdkEvents this widget gets"),
GDK_TYPE_EVENT_MASK,
GDK_STRUCTURE_MASK,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_EXTENSION_EVENTS,
g_param_spec_enum ("extension_events",
_("Extension events"),
_("The mask that decides what kind of extension events this widget gets"),
GDK_TYPE_EXTENSION_MODE,
GDK_EXTENSION_EVENTS_NONE,
G_PARAM_READWRITE));
widget_signals[SHOW] =
g_signal_new ("show",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, show),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[HIDE] =
g_signal_new ("hide",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, hide),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[MAP] =
g_signal_new ("map",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, map),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[UNMAP] =
g_signal_new ("unmap",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, unmap),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[REALIZE] =
g_signal_new ("realize",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, realize),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[UNREALIZE] =
g_signal_new ("unrealize",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, unrealize),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[SIZE_REQUEST] =
g_signal_new ("size_request",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, size_request),
NULL, NULL,
_gtk_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
GTK_TYPE_REQUISITION | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SIZE_ALLOCATE] =
g_signal_new ("size_allocate",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, size_allocate),
NULL, NULL,
_gtk_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
GDK_TYPE_RECTANGLE | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[STATE_CHANGED] =
g_signal_new ("state_changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, state_changed),
NULL, NULL,
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_STATE_TYPE);
widget_signals[PARENT_SET] =
g_signal_new ("parent_set",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, parent_set),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
widget_signals[HIERARCHY_CHANGED] =
g_signal_new ("hierarchy_changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, hierarchy_changed),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
widget_signals[STYLE_SET] =
g_signal_new ("style_set",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, style_set),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_STYLE);
widget_signals[DIRECTION_CHANGED] =
g_signal_new ("direction_changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, direction_changed),
NULL, NULL,
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_TEXT_DIRECTION);
widget_signals[GRAB_NOTIFY] =
g_signal_new ("grab_notify",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkWidgetClass, grab_notify),
NULL, NULL,
_gtk_marshal_VOID__BOOLEAN,
G_TYPE_NONE, 1,
G_TYPE_BOOLEAN);
/**
* GtkWidget::child-notify:
* @widget: the object which received the signal.
* @pspec: the #GParamSpec of the changed child property.
*
* The ::child-notify signal is emitted for each child property that has
* changed on an object. The signal's detail holds the property name.
*/
widget_signals[CHILD_NOTIFY] =
g_signal_new ("child_notify",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE | G_SIGNAL_DETAILED | G_SIGNAL_NO_HOOKS,
G_STRUCT_OFFSET (GtkWidgetClass, child_notify),
NULL, NULL,
g_cclosure_marshal_VOID__PARAM,
G_TYPE_NONE, 1,
G_TYPE_PARAM);
widget_signals[MNEMONIC_ACTIVATE] =
g_signal_new ("mnemonic_activate",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, mnemonic_activate),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOOLEAN,
G_TYPE_BOOLEAN, 1,
G_TYPE_BOOLEAN);
widget_signals[GRAB_FOCUS] =
g_signal_new ("grab_focus",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkWidgetClass, grab_focus),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
widget_signals[FOCUS] =
g_signal_new ("focus",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, focus),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__ENUM,
G_TYPE_BOOLEAN, 1,
GTK_TYPE_DIRECTION_TYPE);
widget_signals[EVENT] =
g_signal_new ("event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[EVENT_AFTER] =
g_signal_new ("event-after",
G_TYPE_FROM_CLASS (gobject_class),
0,
0,
NULL, NULL,
_gtk_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[BUTTON_PRESS_EVENT] =
g_signal_new ("button_press_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, button_press_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[BUTTON_RELEASE_EVENT] =
g_signal_new ("button_release_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, button_release_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SCROLL_EVENT] =
g_signal_new ("scroll_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, scroll_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[MOTION_NOTIFY_EVENT] =
g_signal_new ("motion_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, motion_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[DELETE_EVENT] =
g_signal_new ("delete_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, delete_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[DESTROY_EVENT] =
g_signal_new ("destroy_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, destroy_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[EXPOSE_EVENT] =
g_signal_new ("expose_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, expose_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[KEY_PRESS_EVENT] =
g_signal_new ("key_press_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, key_press_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[KEY_RELEASE_EVENT] =
g_signal_new ("key_release_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, key_release_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[ENTER_NOTIFY_EVENT] =
g_signal_new ("enter_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, enter_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[LEAVE_NOTIFY_EVENT] =
g_signal_new ("leave_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, leave_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[CONFIGURE_EVENT] =
g_signal_new ("configure_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, configure_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[FOCUS_IN_EVENT] =
g_signal_new ("focus_in_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, focus_in_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[FOCUS_OUT_EVENT] =
g_signal_new ("focus_out_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, focus_out_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[MAP_EVENT] =
g_signal_new ("map_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, map_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[UNMAP_EVENT] =
g_signal_new ("unmap_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, unmap_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[PROPERTY_NOTIFY_EVENT] =
g_signal_new ("property_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, property_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SELECTION_CLEAR_EVENT] =
g_signal_new ("selection_clear_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, selection_clear_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SELECTION_REQUEST_EVENT] =
g_signal_new ("selection_request_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, selection_request_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SELECTION_NOTIFY_EVENT] =
g_signal_new ("selection_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, selection_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[SELECTION_RECEIVED] =
g_signal_new ("selection_received",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, selection_received),
NULL, NULL,
_gtk_marshal_VOID__BOXED_UINT,
G_TYPE_NONE, 2,
GTK_TYPE_SELECTION_DATA | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_UINT);
widget_signals[SELECTION_GET] =
g_signal_new ("selection_get",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, selection_get),
NULL, NULL,
_gtk_marshal_VOID__BOXED_UINT_UINT,
G_TYPE_NONE, 3,
GTK_TYPE_SELECTION_DATA | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_UINT,
G_TYPE_UINT);
widget_signals[PROXIMITY_IN_EVENT] =
g_signal_new ("proximity_in_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, proximity_in_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[PROXIMITY_OUT_EVENT] =
g_signal_new ("proximity_out_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, proximity_out_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[DRAG_LEAVE] =
g_signal_new ("drag_leave",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_leave),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_UINT,
G_TYPE_NONE, 2,
GDK_TYPE_DRAG_CONTEXT,
G_TYPE_UINT);
widget_signals[DRAG_BEGIN] =
g_signal_new ("drag_begin",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_begin),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_DRAG_CONTEXT);
widget_signals[DRAG_END] =
g_signal_new ("drag_end",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_end),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_DRAG_CONTEXT);
widget_signals[DRAG_DATA_DELETE] =
g_signal_new ("drag_data_delete",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_data_delete),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_DRAG_CONTEXT);
widget_signals[DRAG_MOTION] =
g_signal_new ("drag_motion",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_motion),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__OBJECT_INT_INT_UINT,
G_TYPE_BOOLEAN, 4,
GDK_TYPE_DRAG_CONTEXT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_UINT);
widget_signals[DRAG_DROP] =
g_signal_new ("drag_drop",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_drop),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__OBJECT_INT_INT_UINT,
G_TYPE_BOOLEAN, 4,
GDK_TYPE_DRAG_CONTEXT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_UINT);
widget_signals[DRAG_DATA_GET] =
g_signal_new ("drag_data_get",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_data_get),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_BOXED_UINT_UINT,
G_TYPE_NONE, 4,
GDK_TYPE_DRAG_CONTEXT,
GTK_TYPE_SELECTION_DATA | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_UINT,
G_TYPE_UINT);
/**
* GtkWidget::drag-data-received:
* @widget: the object which received the signal.
* @drag_context: the drag context
* @x: where the drop happened
* @y: where the drop happened
* @data: the received data
* @info: the info that has been registered with the target in the
* #GtkTargetList.
* @time: the timestamp at which the data was received
* @user_data: user data set when the signal handler was connected.
*
* The ::drag-data-received signal is emitted on the drop site when the drop
* happens and the data has been received. A handler for this signal is
* expected to process the received data and then call gtk_drag_finish(),
* setting the <literal>success</literal> parameter depending on whether the
* data was processed successfully.
*
* The handler may inspect and modify @drag_context->action
* before calling gtk_drag_finish(), e.g. to implement %GTK_ACTION_ASK as
* shown in the following example:
* <informalexample><programlisting>
* void
* drag_data_received (GtkWidget *widget,
* GdkDragContext *drag_context,
* gint x,
* gint y,
* GtkSelectionData *data,
* guint info,
* guint time)
* {
* if ((data->length >= 0) && (data->format == 8))
* {
* if (drag_context->action == GDK_ACTION_ASK)
* {
* GtkWidget *dialog;
* gint response;
*
* dialog = gtk_message_dialog_new (NULL,
* GTK_DIALOG_MODAL |
* GTK_DIALOG_DESTROY_WITH_PARENT,
* GTK_MESSAGE_INFO,
* GTK_BUTTONS_YES_NO,
* "Move the data ?\n");
* response = gtk_dialog_run (GTK_DIALOG (dialog));
* gtk_widget_destroy (dialog);
*
* if (response == GTK_RESPONSE_YES)
* drag_context->action = GDK_ACTION_MOVE;
* else
* drag_context->action = GDK_ACTION_COPY;
* }
*
* gtk_drag_finish (drag_context, TRUE, FALSE, time);
* return;
* }
*
* gtk_drag_finish (drag_context, FALSE, FALSE, time);
* }
* </programlisting></informalexample>
*/
widget_signals[DRAG_DATA_RECEIVED] =
g_signal_new ("drag_data_received",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, drag_data_received),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_INT_INT_BOXED_UINT_UINT,
G_TYPE_NONE, 6,
GDK_TYPE_DRAG_CONTEXT,
G_TYPE_INT,
G_TYPE_INT,
GTK_TYPE_SELECTION_DATA | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_UINT,
G_TYPE_UINT);
widget_signals[VISIBILITY_NOTIFY_EVENT] =
g_signal_new ("visibility_notify_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, visibility_notify_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[CLIENT_EVENT] =
g_signal_new ("client_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, client_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[NO_EXPOSE_EVENT] =
g_signal_new ("no_expose_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, no_expose_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[WINDOW_STATE_EVENT] =
g_signal_new ("window_state_event",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, window_state_event),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__BOXED,
G_TYPE_BOOLEAN, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
widget_signals[POPUP_MENU] =
g_signal_new ("popup_menu",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkWidgetClass, popup_menu),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
widget_signals[SHOW_HELP] =
g_signal_new ("show_help",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkWidgetClass, show_help),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__ENUM,
G_TYPE_BOOLEAN, 1,
GTK_TYPE_WIDGET_HELP_TYPE);
widget_signals[ACCEL_CLOSURES_CHANGED] =
g_signal_new ("accel_closures_changed",
G_TYPE_FROM_CLASS (gobject_class),
0,
0,
NULL, NULL,
_gtk_marshal_NONE__NONE,
G_TYPE_NONE, 0);
widget_signals[SCREEN_CHANGED] =
g_signal_new ("screen_changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkWidgetClass, screen_changed),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GDK_TYPE_SCREEN);
binding_set = gtk_binding_set_by_class (klass);
gtk_binding_entry_add_signal (binding_set, GDK_F10, GDK_SHIFT_MASK,
"popup_menu", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Menu, 0,
"popup_menu", 0);
gtk_binding_entry_add_signal (binding_set, GDK_F1, GDK_CONTROL_MASK,
"show_help", 1,
GTK_TYPE_WIDGET_HELP_TYPE,
GTK_WIDGET_HELP_TOOLTIP);
gtk_binding_entry_add_signal (binding_set, GDK_KP_F1, GDK_CONTROL_MASK,
"show_help", 1,
GTK_TYPE_WIDGET_HELP_TYPE,
GTK_WIDGET_HELP_TOOLTIP);
gtk_binding_entry_add_signal (binding_set, GDK_F1, GDK_SHIFT_MASK,
"show_help", 1,
GTK_TYPE_WIDGET_HELP_TYPE,
GTK_WIDGET_HELP_WHATS_THIS);
gtk_binding_entry_add_signal (binding_set, GDK_KP_F1, GDK_SHIFT_MASK,
"show_help", 1,
GTK_TYPE_WIDGET_HELP_TYPE,
GTK_WIDGET_HELP_WHATS_THIS);
gtk_widget_class_install_style_property (klass,
g_param_spec_boolean ("interior_focus",
_("Interior Focus"),
_("Whether to draw the focus indicator inside widgets"),
TRUE,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (klass,
g_param_spec_int ("focus-line-width",
_("Focus linewidth"),
_("Width, in pixels, of the focus indicator line"),
0, G_MAXINT, 1,
G_PARAM_READWRITE));
gtk_widget_class_install_style_property (klass,
g_param_spec_string ("focus-line-pattern",
_("Focus line dash pattern"),
_("Dash pattern used to draw the focus indicator"),
"\1\1",
G_PARAM_READWRITE));
gtk_widget_class_install_style_property (klass,
g_param_spec_int ("focus-padding",
_("Focus padding"),
_("Width, in pixels, between focus indicator and the widget 'box'"),
0, G_MAXINT, 1,
G_PARAM_READWRITE));
gtk_widget_class_install_style_property (klass,
g_param_spec_boxed ("cursor-color",
_("Cursor color"),
_("Color with which to draw insertion cursor"),
GDK_TYPE_COLOR,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (klass,
g_param_spec_boxed ("secondary-cursor-color",
_("Secondary cursor color"),
_("Color with which to draw the secondary insertion cursor when editing mixed right-to-left and left-to-right text"),
GDK_TYPE_COLOR,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (klass,
g_param_spec_float ("cursor-aspect-ratio",
_("Cursor line aspect ratio"),
_("Aspect ratio with which to draw insertion cursor"),
0.0, 1.0, 0.04,
G_PARAM_READABLE));
}
static void
gtk_widget_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (object);
switch (prop_id)
{
guint32 saved_flags;
case PROP_NAME:
gtk_widget_set_name (widget, g_value_get_string (value));
break;
case PROP_PARENT:
gtk_container_add (GTK_CONTAINER (g_value_get_object (value)), widget);
break;
case PROP_WIDTH_REQUEST:
gtk_widget_set_usize_internal (widget, g_value_get_int (value), -2);
break;
case PROP_HEIGHT_REQUEST:
gtk_widget_set_usize_internal (widget, -2, g_value_get_int (value));
break;
case PROP_VISIBLE:
if (g_value_get_boolean (value))
gtk_widget_show (widget);
else
gtk_widget_hide (widget);
break;
case PROP_SENSITIVE:
gtk_widget_set_sensitive (widget, g_value_get_boolean (value));
break;
case PROP_APP_PAINTABLE:
gtk_widget_set_app_paintable (widget, g_value_get_boolean (value));
break;
case PROP_CAN_FOCUS:
saved_flags = GTK_WIDGET_FLAGS (widget);
if (g_value_get_boolean (value))
GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
else
GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_FOCUS);
if (saved_flags != GTK_WIDGET_FLAGS (widget))
gtk_widget_queue_resize (widget);
break;
case PROP_HAS_FOCUS:
if (g_value_get_boolean (value))
gtk_widget_grab_focus (widget);
break;
case PROP_IS_FOCUS:
if (g_value_get_boolean (value))
gtk_widget_grab_focus (widget);
break;
case PROP_CAN_DEFAULT:
saved_flags = GTK_WIDGET_FLAGS (widget);
if (g_value_get_boolean (value))
GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_DEFAULT);
else
GTK_WIDGET_UNSET_FLAGS (widget, GTK_CAN_DEFAULT);
if (saved_flags != GTK_WIDGET_FLAGS (widget))
gtk_widget_queue_resize (widget);
break;
case PROP_HAS_DEFAULT:
if (g_value_get_boolean (value))
gtk_widget_grab_default (widget);
break;
case PROP_RECEIVES_DEFAULT:
if (g_value_get_boolean (value))
GTK_WIDGET_SET_FLAGS (widget, GTK_RECEIVES_DEFAULT);
else
GTK_WIDGET_UNSET_FLAGS (widget, GTK_RECEIVES_DEFAULT);
break;
case PROP_STYLE:
gtk_widget_set_style (widget, g_value_get_object (value));
break;
case PROP_EVENTS:
if (!GTK_WIDGET_REALIZED (widget) && !GTK_WIDGET_NO_WINDOW (widget))
gtk_widget_set_events (widget, g_value_get_flags (value));
break;
case PROP_EXTENSION_EVENTS:
gtk_widget_set_extension_events (widget, g_value_get_enum (value));
break;
default:
break;
}
}
static void
gtk_widget_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkWidget *widget = GTK_WIDGET (object);
switch (prop_id)
{
gint *eventp;
GdkExtensionMode *modep;
case PROP_NAME:
if (widget->name)
g_value_set_string (value, widget->name);
else
g_value_set_string (value, "");
break;
case PROP_PARENT:
if (widget->parent)
g_value_set_object (value, widget->parent);
else
g_value_set_object (value, NULL);
break;
case PROP_WIDTH_REQUEST:
{
int w;
gtk_widget_get_size_request (widget, &w, NULL);
g_value_set_int (value, w);
}
break;
case PROP_HEIGHT_REQUEST:
{
int h;
gtk_widget_get_size_request (widget, NULL, &h);
g_value_set_int (value, h);
}
break;
case PROP_VISIBLE:
g_value_set_boolean (value, (GTK_WIDGET_VISIBLE (widget) != FALSE));
break;
case PROP_SENSITIVE:
g_value_set_boolean (value, (GTK_WIDGET_SENSITIVE (widget) != FALSE));
break;
case PROP_APP_PAINTABLE:
g_value_set_boolean (value, (GTK_WIDGET_APP_PAINTABLE (widget) != FALSE));
break;
case PROP_CAN_FOCUS:
g_value_set_boolean (value, (GTK_WIDGET_CAN_FOCUS (widget) != FALSE));
break;
case PROP_HAS_FOCUS:
g_value_set_boolean (value, (GTK_WIDGET_HAS_FOCUS (widget) != FALSE));
break;
case PROP_IS_FOCUS:
g_value_set_boolean (value, (gtk_widget_is_focus (widget)));
break;
case PROP_CAN_DEFAULT:
g_value_set_boolean (value, (GTK_WIDGET_CAN_DEFAULT (widget) != FALSE));
break;
case PROP_HAS_DEFAULT:
g_value_set_boolean (value, (GTK_WIDGET_HAS_DEFAULT (widget) != FALSE));
break;
case PROP_RECEIVES_DEFAULT:
g_value_set_boolean (value, (GTK_WIDGET_RECEIVES_DEFAULT (widget) != FALSE));
break;
case PROP_COMPOSITE_CHILD:
g_value_set_boolean (value, (GTK_WIDGET_COMPOSITE_CHILD (widget) != FALSE));
break;
case PROP_STYLE:
g_value_set_object (value, gtk_widget_get_style (widget));
break;
case PROP_EVENTS:
eventp = g_object_get_qdata (G_OBJECT (widget), quark_event_mask);
if (!eventp)
g_value_set_flags (value, 0);
else
g_value_set_flags (value, *eventp);
break;
case PROP_EXTENSION_EVENTS:
modep = g_object_get_qdata (G_OBJECT (widget), quark_extension_event_mode);
if (!modep)
g_value_set_enum (value, 0);
else
g_value_set_enum (value, (GdkExtensionMode) *modep);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_widget_init (GtkWidget *widget)
{
GTK_PRIVATE_FLAGS (widget) = PRIVATE_GTK_CHILD_VISIBLE;
widget->state = GTK_STATE_NORMAL;
widget->saved_state = GTK_STATE_NORMAL;
widget->name = NULL;
widget->requisition.width = 0;
widget->requisition.height = 0;
widget->allocation.x = -1;
widget->allocation.y = -1;
widget->allocation.width = 1;
widget->allocation.height = 1;
widget->window = NULL;
widget->parent = NULL;
GTK_WIDGET_SET_FLAGS (widget,
GTK_SENSITIVE |
GTK_PARENT_SENSITIVE |
(composite_child_stack ? GTK_COMPOSITE_CHILD : 0) |
GTK_DOUBLE_BUFFERED);
GTK_PRIVATE_SET_FLAG (widget, GTK_REDRAW_ON_ALLOC);
GTK_PRIVATE_SET_FLAG (widget, GTK_REQUEST_NEEDED);
GTK_PRIVATE_SET_FLAG (widget, GTK_ALLOC_NEEDED);
widget->style = gtk_widget_get_default_style ();
g_object_ref (widget->style);
}
static void
gtk_widget_dispatch_child_properties_changed (GtkWidget *widget,
guint n_pspecs,
GParamSpec **pspecs)
{
GtkWidget *container = widget->parent;
guint i;
for (i = 0; widget->parent == container && i < n_pspecs; i++)
g_signal_emit (widget, widget_signals[CHILD_NOTIFY], g_quark_from_string (pspecs[i]->name), pspecs[i]);
}
/**
* gtk_widget_freeze_child_notify:
* @widget: a #GtkWidget
*
* Stops emission of "child-notify" signals on @widget. The signals are
* queued until gtk_widget_thaw_child_notify() is called on @widget.
*
* This is the analogue of g_object_freeze_notify() for child properties.
**/
void
gtk_widget_freeze_child_notify (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!G_OBJECT (widget)->ref_count)
return;
g_object_ref (widget);
g_object_notify_queue_freeze (G_OBJECT (widget), _gtk_widget_child_property_notify_context);
g_object_unref (widget);
}
/**
* gtk_widget_child_notify:
* @widget: a #GtkWidget
* @child_property: the name of a child property installed on the
* class of @widget<!-- -->'s parent.
*
* Emits a "child-notify" signal for the
* <link linkend="child-properties">child property</link> @child_property
* on @widget.
*
* This is the analogue of g_object_notify() for child properties.
**/
void
gtk_widget_child_notify (GtkWidget *widget,
const gchar *child_property)
{
GParamSpec *pspec;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (child_property != NULL);
if (!G_OBJECT (widget)->ref_count || !widget->parent)
return;
g_object_ref (widget);
pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
child_property,
G_OBJECT_TYPE (widget->parent),
TRUE);
if (!pspec)
g_warning ("%s: container class `%s' has no child property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (widget->parent),
child_property);
else
{
GObjectNotifyQueue *nqueue = g_object_notify_queue_freeze (G_OBJECT (widget), _gtk_widget_child_property_notify_context);
g_object_notify_queue_add (G_OBJECT (widget), nqueue, pspec);
g_object_notify_queue_thaw (G_OBJECT (widget), nqueue);
}
g_object_unref (widget);
}
/**
* gtk_widget_thaw_child_notify:
* @widget: a #GtkWidget
*
* Reverts the effect of a previous call to gtk_widget_freeze_child_notify().
* This causes all queued "child-notify" signals on @widget to be emitted.
*/
void
gtk_widget_thaw_child_notify (GtkWidget *widget)
{
GObjectNotifyQueue *nqueue;
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!G_OBJECT (widget)->ref_count)
return;
g_object_ref (widget);
nqueue = g_object_notify_queue_from_object (G_OBJECT (widget), _gtk_widget_child_property_notify_context);
if (!nqueue || !nqueue->freeze_count)
g_warning (G_STRLOC ": child-property-changed notification for %s(%p) is not frozen",
G_OBJECT_TYPE_NAME (widget), widget);
else
g_object_notify_queue_thaw (G_OBJECT (widget), nqueue);
g_object_unref (widget);
}
/**
* gtk_widget_new:
* @type: type ID of the widget to create
* @first_property_name: name of first property to set
* @Varargs: value of first property, followed by more properties, %NULL-terminated
*
* This is a convenience function for creating a widget and setting
* its properties in one go. For example you might write:
* <literal>gtk_widget_new (GTK_TYPE_LABEL, "label", "Hello World", "xalign",
* 0.0, NULL)</literal> to create a left-aligned label. Equivalent to
* g_object_new(), but returns a widget so you don't have to
* cast the object yourself.
*
* Return value: a new #GtkWidget of type @widget_type
**/
GtkWidget*
gtk_widget_new (GType type,
const gchar *first_property_name,
...)
{
GtkWidget *widget;
va_list var_args;
g_return_val_if_fail (g_type_is_a (type, GTK_TYPE_WIDGET), NULL);
va_start (var_args, first_property_name);
widget = (GtkWidget *)g_object_new_valist (type, first_property_name, var_args);
va_end (var_args);
return widget;
}
/**
* gtk_widget_set:
* @widget: a #GtkWidget
* @first_property_name: name of first property to set
* @Varargs: value of first property, followed by more properties, %NULL-terminated
*
* Like g_object_set() - there's no reason to use this instead of
* g_object_set().
**/
void
gtk_widget_set (GtkWidget *widget,
const gchar *first_property_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_WIDGET (widget));
va_start (var_args, first_property_name);
g_object_set_valist (G_OBJECT (widget), first_property_name, var_args);
va_end (var_args);
}
static inline void
gtk_widget_queue_draw_child (GtkWidget *widget)
{
GtkWidget *parent;
parent = widget->parent;
if (parent && GTK_WIDGET_DRAWABLE (parent))
gtk_widget_queue_draw_area (parent,
widget->allocation.x,
widget->allocation.y,
widget->allocation.width,
widget->allocation.height);
}
/**
* gtk_widget_unparent:
* @widget: a #GtkWidget
*
* This function is only for use in widget implementations.
* Should be called by implementations of the remove method
* on #GtkContainer, to dissociate a child from the container.
**/
void
gtk_widget_unparent (GtkWidget *widget)
{
GObjectNotifyQueue *nqueue;
GtkWidget *toplevel;
GtkWidget *old_parent;
g_return_if_fail (GTK_IS_WIDGET (widget));
if (widget->parent == NULL)
return;
/* keep this function in sync with gtk_menu_detach()
*/
g_object_freeze_notify (G_OBJECT (widget));
nqueue = g_object_notify_queue_freeze (G_OBJECT (widget), _gtk_widget_child_property_notify_context);
toplevel = gtk_widget_get_toplevel (widget);
if (GTK_WIDGET_TOPLEVEL (toplevel))
_gtk_window_unset_focus_and_default (GTK_WINDOW (toplevel), widget);
if (GTK_CONTAINER (widget->parent)->focus_child == widget)
gtk_container_set_focus_child (GTK_CONTAINER (widget->parent), NULL);
/* If we are unanchoring the child, we save around the toplevel
* to emit hierarchy changed
*/
if (GTK_WIDGET_ANCHORED (widget->parent))
g_object_ref (toplevel);
else
toplevel = NULL;
gtk_widget_queue_draw_child (widget);
/* Reset the width and height here, to force reallocation if we
* get added back to a new parent. This won't work if our new
* allocation is smaller than 1x1 and we actually want a size of 1x1...
* (would 0x0 be OK here?)
*/
widget->allocation.width = 1;
widget->allocation.height = 1;
if (GTK_WIDGET_REALIZED (widget) && !GTK_WIDGET_IN_REPARENT (widget))
gtk_widget_unrealize (widget);
/* Removing a widget from a container restores the child visible
* flag to the default state, so it doesn't affect the child
* in the next parent.
*/
GTK_PRIVATE_SET_FLAG (widget, GTK_CHILD_VISIBLE);
old_parent = widget->parent;
widget->parent = NULL;
gtk_widget_set_parent_window (widget, NULL);
g_signal_emit (widget, widget_signals[PARENT_SET], 0, old_parent);
if (toplevel)
{
_gtk_widget_propagate_hierarchy_changed (widget, toplevel);
g_object_unref (toplevel);
}
g_object_notify (G_OBJECT (widget), "parent");
g_object_thaw_notify (G_OBJECT (widget));
if (!widget->parent)
g_object_notify_queue_clear (G_OBJECT (widget), nqueue);
g_object_notify_queue_thaw (G_OBJECT (widget), nqueue);
g_object_unref (widget);
}
/**
* gtk_widget_destroy:
* @widget: a #GtkWidget
*
* Destroys a widget. Equivalent to gtk_object_destroy(), except that
* you don't have to cast the widget to #GtkObject. When a widget is
* destroyed, it will break any references it holds to other objects.
* If the widget is inside a container, the widget will be removed
* from the container. If the widget is a toplevel (derived from
* #GtkWindow), it will be removed from the list of toplevels, and the
* reference GTK+ holds to it will be removed. Removing a
* widget from its container or the list of toplevels results in the
* widget being finalized, unless you've added additional references
* to the widget with g_object_ref().
*
* In most cases, only toplevel widgets (windows) require explicit
* destruction, because when you destroy a toplevel its children will
* be destroyed as well.
*
**/
void
gtk_widget_destroy (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_object_destroy ((GtkObject*) widget);
}
/**
* gtk_widget_destroyed:
* @widget: a #GtkWidget
* @widget_pointer: address of a variable that contains @widget
*
* This function sets *@widget_pointer to %NULL if @widget_pointer !=
* %NULL. It's intended to be used as a callback connected to the
* "destroy" signal of a widget. You connect gtk_widget_destroyed()
* as a signal handler, and pass the address of your widget variable
* as user data. Then when the widget is destroyed, the variable will
* be set to %NULL. Useful for example to avoid multiple copies
* of the same dialog.
*
**/
void
gtk_widget_destroyed (GtkWidget *widget,
GtkWidget **widget_pointer)
{
/* Don't make any assumptions about the
* value of widget!
* Even check widget_pointer.
*/
if (widget_pointer)
*widget_pointer = NULL;
}
/**
* gtk_widget_show:
* @widget: a #GtkWidget
*
* Flags a widget to be displayed. Any widget that isn't shown will
* not appear on the screen. If you want to show all the widgets in a
* container, it's easier to call gtk_widget_show_all() on the
* container, instead of individually showing the widgets.
*
* Remember that you have to show the containers containing a widget,
* in addition to the widget itself, before it will appear onscreen.
*
* When a toplevel container is shown, it is immediately realized and
* mapped; other shown widgets are realized and mapped when their
* toplevel container is realized and mapped.
*
**/
void
gtk_widget_show (GtkWidget *widget)
{
if (!GTK_WIDGET_VISIBLE (widget))
{
g_object_ref (widget);
if (!GTK_WIDGET_TOPLEVEL (widget))
gtk_widget_queue_resize (widget);
g_signal_emit (widget, widget_signals[SHOW], 0);
g_object_notify (G_OBJECT (widget), "visible");
g_object_unref (widget);
}
}
static void
gtk_widget_real_show (GtkWidget *widget)
{
if (!GTK_WIDGET_VISIBLE (widget))
{
GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
if (widget->parent &&
GTK_WIDGET_MAPPED (widget->parent) &&
GTK_WIDGET_CHILD_VISIBLE (widget) &&
!GTK_WIDGET_MAPPED (widget))
gtk_widget_map (widget);
}
}
static void
gtk_widget_show_map_callback (GtkWidget *widget, GdkEvent *event, gint *flag)
{
*flag = TRUE;
g_signal_handlers_disconnect_by_func (widget,
gtk_widget_show_map_callback,
flag);
}
/**
* gtk_widget_show_now:
* @widget: a #GtkWidget
*
* Shows a widget. If the widget is an unmapped toplevel widget
* (i.e. a #GtkWindow that has not yet been shown), enter the main
* loop and wait for the window to actually be mapped. Be careful;
* because the main loop is running, anything can happen during
* this function.
**/
void
gtk_widget_show_now (GtkWidget *widget)
{
gint flag = FALSE;
g_return_if_fail (GTK_IS_WIDGET (widget));
/* make sure we will get event */
if (!GTK_WIDGET_MAPPED (widget) &&
GTK_WIDGET_TOPLEVEL (widget))
{
gtk_widget_show (widget);
g_signal_connect (widget, "map_event",
G_CALLBACK (gtk_widget_show_map_callback),
&flag);
while (!flag)
gtk_main_iteration ();
}
else
gtk_widget_show (widget);
}
/**
* gtk_widget_hide:
* @widget: a #GtkWidget
*
* Reverses the effects of gtk_widget_show(), causing the widget to be
* hidden (invisible to the user).
**/
void
gtk_widget_hide (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (GTK_WIDGET_VISIBLE (widget))
{
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
if (toplevel != widget && GTK_WIDGET_TOPLEVEL (toplevel))
_gtk_window_unset_focus_and_default (GTK_WINDOW (toplevel), widget);
g_object_ref (widget);
g_signal_emit (widget, widget_signals[HIDE], 0);
if (!GTK_WIDGET_TOPLEVEL (widget))
gtk_widget_queue_resize (widget);
g_object_notify (G_OBJECT (widget), "visible");
g_object_unref (widget);
}
}
static void
gtk_widget_real_hide (GtkWidget *widget)
{
if (GTK_WIDGET_VISIBLE (widget))
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_VISIBLE);
if (GTK_WIDGET_MAPPED (widget))
gtk_widget_unmap (widget);
}
}
/**
* gtk_widget_hide_on_delete:
* @widget: a #GtkWidget
*
* Utility function; intended to be connected to the "delete_event"
* signal on a #GtkWindow. The function calls gtk_widget_hide() on its
* argument, then returns %TRUE. If connected to "delete_event", the
* result is that clicking the close button for a window (on the
* window frame, top right corner usually) will hide but not destroy
* the window. By default, GTK+ destroys windows when "delete_event"
* is received.
*
* Return value: %TRUE
**/
gboolean
gtk_widget_hide_on_delete (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
gtk_widget_hide (widget);
return TRUE;
}
/**
* gtk_widget_show_all:
* @widget: a #GtkWidget
*
* Recursively shows a widget, and any child widgets (if the widget is
* a container).
**/
void
gtk_widget_show_all (GtkWidget *widget)
{
GtkWidgetClass *class;
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_WIDGET_GET_CLASS (widget);
if (class->show_all)
class->show_all (widget);
}
/**
* gtk_widget_hide_all:
* @widget: a #GtkWidget
*
* Recursively hides a widget and any child widgets.
**/
void
gtk_widget_hide_all (GtkWidget *widget)
{
GtkWidgetClass *class;
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_WIDGET_GET_CLASS (widget);
if (class->hide_all)
class->hide_all (widget);
}
/**
* gtk_widget_map:
* @widget: a #GtkWidget
*
* This function is only for use in widget implementations. Causes
* a widget to be mapped if it isn't already.
*
**/
void
gtk_widget_map (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_VISIBLE (widget));
g_return_if_fail (GTK_WIDGET_CHILD_VISIBLE (widget));
if (!GTK_WIDGET_MAPPED (widget))
{
if (!GTK_WIDGET_REALIZED (widget))
gtk_widget_realize (widget);
g_signal_emit (widget, widget_signals[MAP], 0);
if (GTK_WIDGET_NO_WINDOW (widget))
gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
}
}
/**
* gtk_widget_unmap:
* @widget: a #GtkWidget
*
* This function is only for use in widget implementations. Causes
* a widget to be unmapped if it's currently mapped.
*
**/
void
gtk_widget_unmap (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (GTK_WIDGET_MAPPED (widget))
{
if (GTK_WIDGET_NO_WINDOW (widget))
gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
g_signal_emit (widget, widget_signals[UNMAP], 0);
}
}
/**
* gtk_widget_realize:
* @widget: a #GtkWidget
*
* Creates the GDK (windowing system) resources associated with a
* widget. For example, @widget->window will be created when a widget
* is realized. Normally realization happens implicitly; if you show
* a widget and all its parent containers, then the widget will be
* realized and mapped automatically.
*
* Realizing a widget requires all
* the widget's parent widgets to be realized; calling
* gtk_widget_realize() realizes the widget's parents in addition to
* @widget itself. If a widget is not yet inside a toplevel window
* when you realize it, bad things will happen.
*
* This function is primarily used in widget implementations, and
* isn't very useful otherwise. Many times when you think you might
* need it, a better approach is to connect to a signal that will be
* called after the widget is realized automatically, such as
* "expose_event". Or simply g_signal_connect_after() to the
* "realize" signal.
*
**/
void
gtk_widget_realize (GtkWidget *widget)
{
gint events;
GdkExtensionMode mode;
GtkWidgetShapeInfo *shape_info;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_ANCHORED (widget) ||
GTK_IS_INVISIBLE (widget));
if (!GTK_WIDGET_REALIZED (widget))
{
/*
if (GTK_IS_CONTAINER (widget) && !GTK_WIDGET_NO_WINDOW (widget))
g_message ("gtk_widget_realize(%s)", g_type_name (GTK_WIDGET_TYPE (widget)));
*/
if (widget->parent == NULL &&
!GTK_WIDGET_TOPLEVEL (widget))
g_warning ("Calling gtk_widget_realize() on a widget that isn't "
"inside a toplevel window is not going to work very well. "
"Widgets must be inside a toplevel container before realizing them.");
if (widget->parent && !GTK_WIDGET_REALIZED (widget->parent))
gtk_widget_realize (widget->parent);
gtk_widget_ensure_style (widget);
g_signal_emit (widget, widget_signals[REALIZE], 0);
if (GTK_WIDGET_HAS_SHAPE_MASK (widget))
{
shape_info = g_object_get_qdata (G_OBJECT (widget), quark_shape_info);
gdk_window_shape_combine_mask (widget->window,
shape_info->shape_mask,
shape_info->offset_x,
shape_info->offset_y);
}
if (!GTK_WIDGET_NO_WINDOW (widget))
{
mode = gtk_widget_get_extension_events (widget);
if (mode != GDK_EXTENSION_EVENTS_NONE)
{
events = gtk_widget_get_events (widget);
gdk_input_set_extension_events (widget->window, events, mode);
}
}
}
}
/**
* gtk_widget_unrealize:
* @widget: a #GtkWidget
*
* This function is only useful in widget implementations.
* Causes a widget to be unrealized (frees all GDK resources
* associated with the widget, such as @widget->window).
*
**/
void
gtk_widget_unrealize (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (GTK_WIDGET_HAS_SHAPE_MASK (widget))
gtk_widget_shape_combine_mask (widget, NULL, -1, -1);
if (GTK_WIDGET_REALIZED (widget))
{
g_object_ref (widget);
g_signal_emit (widget, widget_signals[UNREALIZE], 0);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
g_object_unref (widget);
}
}
/*****************************************
* Draw queueing.
*****************************************/
/**
* gtk_widget_queue_draw_area:
* @widget: a #GtkWidget
* @x: x coordinate of upper-left corner of rectangle to redraw
* @y: y coordinate of upper-left corner of rectangle to redraw
* @width: width of region to draw
* @height: height of region to draw
*
* Invalidates the rectangular area of @widget defined by @x, @y,
* @width and @height by calling gdk_window_invalidate_rect() on the
* widget's window and all its child windows. Once the main loop
* becomes idle (after the current batch of events has been processed,
* roughly), the window will receive expose events for the union of
* all regions that have been invalidated.
*
* Normally you would only use this function in widget
* implementations. You might also use it, or
* gdk_window_invalidate_rect() directly, to schedule a redraw of a
* #GtkDrawingArea or some portion thereof.
*
* Frequently you can just call gdk_window_invalidate_rect() or
* gdk_window_invalidate_region() instead of this function. Those
* functions will invalidate only a single window, instead of the
* widget and all its children.
*
* The advantage of adding to the invalidated region compared to
* simply drawing immediately is efficiency; using an invalid region
* ensures that you only have to redraw one time.
*
**/
void
gtk_widget_queue_draw_area (GtkWidget *widget,
gint x,
gint y,
gint width,
gint height)
{
GdkRectangle invalid_rect;
GtkWidget *w;
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!GTK_WIDGET_REALIZED (widget))
return;
/* Just return if the widget or one of its ancestors isn't mapped */
for (w = widget; w != NULL; w = w->parent)
if (!GTK_WIDGET_MAPPED (w))
return;
/* Find the correct widget */
if (!GTK_WIDGET_NO_WINDOW (widget))
{
if (widget->parent)
{
/* Translate widget relative to window-relative */
gint wx, wy, wwidth, wheight;
gdk_window_get_position (widget->window, &wx, &wy);
x -= wx - widget->allocation.x;
y -= wy - widget->allocation.y;
gdk_drawable_get_size (widget->window, &wwidth, &wheight);
if (x + width <= 0 || y + height <= 0 ||
x >= wwidth || y >= wheight)
return;
if (x < 0)
{
width += x; x = 0;
}
if (y < 0)
{
height += y; y = 0;
}
if (x + width > wwidth)
width = wwidth - x;
if (y + height > wheight)
height = wheight - y;
}
}
invalid_rect.x = x;
invalid_rect.y = y;
invalid_rect.width = width;
invalid_rect.height = height;
gdk_window_invalidate_rect (widget->window, &invalid_rect, TRUE);
}
/**
* gtk_widget_queue_draw:
* @widget: a #GtkWidget
*
* Equivalent to calling gtk_widget_queue_draw_area() for the
* entire area of a widget.
*
**/
void
gtk_widget_queue_draw (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (widget->allocation.width || widget->allocation.height)
{
if (GTK_WIDGET_NO_WINDOW (widget))
gtk_widget_queue_draw_area (widget, widget->allocation.x,
widget->allocation.y,
widget->allocation.width,
widget->allocation.height);
else
gtk_widget_queue_draw_area (widget, 0, 0,
widget->allocation.width,
widget->allocation.height);
}
}
/* Invalidates the given area (allocation-relative-coordinates)
* in all of the widget's windows
*/
/**
* gtk_widget_queue_clear_area:
* @widget: a #GtkWidget
* @x: x coordinate of upper-left corner of rectangle to redraw
* @y: y coordinate of upper-left corner of rectangle to redraw
* @width: width of region to draw
* @height: height of region to draw
*
* This function is no longer different from
* gtk_widget_queue_draw_area(), though it once was. Now it just calls
* gtk_widget_queue_draw_area(). Originally
* gtk_widget_queue_clear_area() would force a redraw of the
* background for %GTK_NO_WINDOW widgets, and
* gtk_widget_queue_draw_area() would not. Now both functions ensure
* the background will be redrawn.
*
* @Deprecated: Use gtk_widget_queue_draw_area() instead.
**/
void
gtk_widget_queue_clear_area (GtkWidget *widget,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_queue_draw_area (widget, x, y, width, height);
}
/**
* gtk_widget_queue_clear:
* @widget: a #GtkWidget
*
* This function does the same as gtk_widget_queue_draw().
*
* @Deprecated: Use gtk_widget_queue_draw() instead.
**/
void
gtk_widget_queue_clear (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_queue_draw (widget);
}
/**
* gtk_widget_queue_resize:
* @widget: a #GtkWidget
*
* This function is only for use in widget implementations.
* Flags a widget to have its size renegotiated; should
* be called when a widget for some reason has a new size request.
* For example, when you change the text in a #GtkLabel, #GtkLabel
* queues a resize to ensure there's enough space for the new text.
*
**/
void
gtk_widget_queue_resize (GtkWidget *widget)
{
GdkRegion *region;
g_return_if_fail (GTK_IS_WIDGET (widget));
if (GTK_WIDGET_REALIZED (widget))
{
region = gdk_region_rectangle (&widget->allocation);
gtk_widget_invalidate_widget_windows (widget, region);
gdk_region_destroy (region);
}
_gtk_size_group_queue_resize (widget);
}
/**
* gtk_widget_draw:
* @widget: a #GtkWidget
* @area: area to draw
*
* In GTK+ 1.2, this function would immediately render the
* region @area of a widget, by invoking the virtual draw method of a
* widget. In GTK+ 2.0, the draw method is gone, and instead
* gtk_widget_draw() simply invalidates the specified region of the
* widget, then updates the invalid region of the widget immediately.
* Usually you don't want to update the region immediately for
* performance reasons, so in general gtk_widget_queue_draw_area() is
* a better choice if you want to draw a region of a widget.
*
**/
void
gtk_widget_draw (GtkWidget *widget,
GdkRectangle *area)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (GTK_WIDGET_DRAWABLE (widget))
{
if (area)
gtk_widget_queue_draw_area (widget,
area->x, area->y,
area->width, area->height);
else
gtk_widget_queue_draw (widget);
gdk_window_process_updates (widget->window, TRUE);
}
}
/**
* gtk_widget_size_request:
* @widget: a #GtkWidget
* @requisition: a #GtkRequisition to be filled in
*
* This function is typically used when implementing a #GtkContainer
* subclass. Obtains the preferred size of a widget. The container
* uses this information to arrange its child widgets and decide what
* size allocations to give them with gtk_widget_size_allocate().
*
* You can also call this function from an application, with some
* caveats. Most notably, getting a size request requires the widget
* to be associated with a screen, because font information may be
* needed. Multihead-aware applications should keep this in mind.
*
* Also remember that the size request is not necessarily the size
* a widget will actually be allocated.
*
* See also gtk_widget_get_child_requisition().
**/
void
gtk_widget_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
#ifdef G_ENABLE_DEBUG
if (requisition == &widget->requisition)
g_warning ("gtk_widget_size_request() called on child widget with request equal\n to widget->requisition. gtk_widget_set_usize() may not work properly.");
#endif /* G_ENABLE_DEBUG */
_gtk_size_group_compute_requisition (widget, requisition);
}
/**
* gtk_widget_get_child_requisition:
* @widget: a #GtkWidget
* @requisition: a #GtkRequisition to be filled in
*
* This function is only for use in widget implementations. Obtains
* @widget->requisition, unless someone has forced a particular
* geometry on the widget (e.g. with gtk_widget_set_usize()), in which
* case it returns that geometry instead of the widget's requisition.
*
* This function differs from gtk_widget_size_request() in that
* it retrieves the last size request value from @widget->requisition,
* while gtk_widget_size_request() actually calls the "size_request" method
* on @widget to compute the size request and fill in @widget->requisition,
* and only then returns @widget->requisition.
*
* Because this function does not call the "size_request" method, it
* can only be used when you know that @widget->requisition is
* up-to-date, that is, gtk_widget_size_request() has been called
* since the last time a resize was queued. In general, only container
* implementations have this information; applications should use
* gtk_widget_size_request().
**/
void
gtk_widget_get_child_requisition (GtkWidget *widget,
GtkRequisition *requisition)
{
_gtk_size_group_get_child_requisition (widget, requisition);
}
static gboolean
invalidate_predicate (GdkWindow *window,
gpointer data)
{
gpointer user_data;
gdk_window_get_user_data (window, &user_data);
return (user_data == data);
}
/* Invalidate @region in widget->window and all children
* of widget->window owned by widget. @region is in the
* same coordinates as widget->allocation and will be
* modified by this call.
*/
static void
gtk_widget_invalidate_widget_windows (GtkWidget *widget,
GdkRegion *region)
{
if (!GTK_WIDGET_NO_WINDOW (widget))
{
int x, y;
gdk_window_get_position (widget->window, &x, &y);
gdk_region_offset (region, -x, -y);
}
gdk_window_invalidate_maybe_recurse (widget->window, region,
invalidate_predicate, widget);
}
/**
* gtk_widget_size_allocate:
* @widget: a #GtkWidget
* @allocation: position and size to be allocated to @widget
*
* This function is only used by #GtkContainer subclasses, to assign a size
* and position to their child widgets.
*
**/
void
gtk_widget_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWidgetAuxInfo *aux_info;
GdkRectangle real_allocation;
GdkRectangle old_allocation;
gboolean alloc_needed;
gboolean size_changed;
gboolean position_changed;
g_return_if_fail (GTK_IS_WIDGET (widget));
alloc_needed = GTK_WIDGET_ALLOC_NEEDED (widget);
GTK_PRIVATE_UNSET_FLAG (widget, GTK_ALLOC_NEEDED);
old_allocation = widget->allocation;
real_allocation = *allocation;
aux_info =_gtk_widget_get_aux_info (widget, FALSE);
if (aux_info)
{
if (aux_info->x_set)
real_allocation.x = aux_info->x;
if (aux_info->y_set)
real_allocation.y = aux_info->y;
}
if (real_allocation.width < 0 || real_allocation.height < 0)
{
g_warning ("gtk_widget_size_allocate(): attempt to allocate widget with width %d and height %d",
real_allocation.width,
real_allocation.height);
}
real_allocation.width = MAX (real_allocation.width, 1);
real_allocation.height = MAX (real_allocation.height, 1);
size_changed = (old_allocation.width != real_allocation.width ||
old_allocation.height != real_allocation.height);
position_changed = (old_allocation.x != real_allocation.x ||
old_allocation.y != real_allocation.y);
if (!alloc_needed && !size_changed && !position_changed)
return;
g_signal_emit (widget, widget_signals[SIZE_ALLOCATE], 0, &real_allocation);
if (GTK_WIDGET_MAPPED (widget))
{
if (GTK_WIDGET_NO_WINDOW (widget) && GTK_WIDGET_REDRAW_ON_ALLOC (widget) && position_changed)
{
/* Invalidate union(old_allaction,widget->allocation) in widget->window
*/
GdkRegion *invalidate = gdk_region_rectangle (&widget->allocation);
gdk_region_union_with_rect (invalidate, &old_allocation);
gdk_window_invalidate_region (widget->window, invalidate, FALSE);
gdk_region_destroy (invalidate);
}
if (size_changed)
{
if (GTK_WIDGET_REDRAW_ON_ALLOC (widget))
{
/* Invalidate union(old_allaction,widget->allocation) in widget->window and descendents owned by widget
*/
GdkRegion *invalidate = gdk_region_rectangle (&widget->allocation);
gdk_region_union_with_rect (invalidate, &old_allocation);
gtk_widget_invalidate_widget_windows (widget, invalidate);
gdk_region_destroy (invalidate);
}
}
}
if ((size_changed || position_changed) && widget->parent &&
GTK_WIDGET_REALIZED (widget->parent) && GTK_CONTAINER (widget->parent)->reallocate_redraws)
{
GdkRegion *invalidate = gdk_region_rectangle (&widget->parent->allocation);
gtk_widget_invalidate_widget_windows (widget->parent, invalidate);
gdk_region_destroy (invalidate);
}
}
/**
* gtk_widget_common_ancestor:
* @widget_a: a #GtkWidget
* @widget_b: a #GtkWidget
*
* Find the common ancestor of @widget_a and @widget_b that
* is closest to the two widgets.
*
* Return value: the closest common ancestor of @widget_a and
* @widget_b or %NULL if @widget_a and @widget_b do not
* share a common ancestor.
**/
static GtkWidget *
gtk_widget_common_ancestor (GtkWidget *widget_a,
GtkWidget *widget_b)
{
GtkWidget *parent_a;
GtkWidget *parent_b;
gint depth_a = 0;
gint depth_b = 0;
parent_a = widget_a;
while (parent_a->parent)
{
parent_a = parent_a->parent;
depth_a++;
}
parent_b = widget_b;
while (parent_b->parent)
{
parent_b = parent_b->parent;
depth_b++;
}
if (parent_a != parent_b)
return NULL;
while (depth_a > depth_b)
{
widget_a = widget_a->parent;
depth_a--;
}
while (depth_b > depth_a)
{
widget_b = widget_b->parent;
depth_b--;
}
while (widget_a != widget_b)
{
widget_a = widget_a->parent;
widget_b = widget_b->parent;
}
return widget_a;
}
/**
* gtk_widget_translate_coordinates:
* @src_widget: a #GtkWidget
* @dest_widget: a #GtkWidget
* @src_x: X position relative to @src_widget
* @src_y: Y position relative to @src_widget
* @dest_x: location to store X position relative to @dest_widget
* @dest_y: location to store Y position relative to @dest_widget
*
* Translate coordinates relative to @src_widget's allocation to coordinates
* relative to @dest_widget's allocations. In order to perform this
* operation, both widgets must be realized, and must share a common
* toplevel.
*
* Return value: %FALSE if either widget was not realized, or there
* was no common ancestor. In this case, nothing is stored in
* *@dest_x and *@dest_y. Otherwise %TRUE.
**/
gboolean
gtk_widget_translate_coordinates (GtkWidget *src_widget,
GtkWidget *dest_widget,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GtkWidget *ancestor;
GdkWindow *window;
g_return_val_if_fail (GTK_IS_WIDGET (src_widget), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (dest_widget), FALSE);
ancestor = gtk_widget_common_ancestor (src_widget, dest_widget);
if (!ancestor || !GTK_WIDGET_REALIZED (src_widget) || !GTK_WIDGET_REALIZED (dest_widget))
return FALSE;
/* Translate from allocation relative to window relative */
if (!GTK_WIDGET_NO_WINDOW (src_widget) && src_widget->parent)
{
gint wx, wy;
gdk_window_get_position (src_widget->window, &wx, &wy);
src_x -= wx - src_widget->allocation.x;
src_y -= wy - src_widget->allocation.y;
}
else
{
src_x += src_widget->allocation.x;
src_y += src_widget->allocation.y;
}
/* Translate to the common ancestor */
window = src_widget->window;
while (window != ancestor->window)
{
gint dx, dy;
gdk_window_get_position (window, &dx, &dy);
src_x += dx;
src_y += dy;
window = gdk_window_get_parent (window);
if (!window) /* Handle GtkHandleBox */
return FALSE;
}
/* And back */
window = dest_widget->window;
while (window != ancestor->window)
{
gint dx, dy;
gdk_window_get_position (window, &dx, &dy);
src_x -= dx;
src_y -= dy;
window = gdk_window_get_parent (window);
if (!window) /* Handle GtkHandleBox */
return FALSE;
}
/* Translate from window relative to allocation relative */
if (!GTK_WIDGET_NO_WINDOW (dest_widget) && dest_widget->parent)
{
gint wx, wy;
gdk_window_get_position (dest_widget->window, &wx, &wy);
src_x += wx - dest_widget->allocation.x;
src_y += wy - dest_widget->allocation.y;
}
else
{
src_x -= dest_widget->allocation.x;
src_y -= dest_widget->allocation.y;
}
if (dest_x)
*dest_x = src_x;
if (dest_y)
*dest_y = src_y;
return TRUE;
}
static void
gtk_widget_real_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget) &&
!GTK_WIDGET_NO_WINDOW (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
}
}
typedef struct {
GClosure closure;
guint signal_id;
} AccelClosure;
static void
closure_accel_activate (GClosure *closure,
GValue *return_value,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint,
gpointer marshal_data)
{
AccelClosure *aclosure = (AccelClosure*) closure;
if (GTK_WIDGET_IS_SENSITIVE (closure->data))
g_signal_emit (closure->data, aclosure->signal_id, 0);
/* we handled the accelerator */
g_value_set_boolean (return_value, TRUE);
}
static void
closures_destroy (gpointer data)
{
GSList *slist, *closures = data;
for (slist = closures; slist; slist = slist->next)
{
g_closure_invalidate (slist->data);
g_closure_unref (slist->data);
}
g_slist_free (closures);
}
static GClosure*
widget_new_accel_closure (GtkWidget *widget,
guint signal_id)
{
AccelClosure *aclosure;
GClosure *closure = NULL;
GSList *slist, *closures;
closures = g_object_steal_qdata (G_OBJECT (widget), quark_accel_closures);
for (slist = closures; slist; slist = slist->next)
if (!gtk_accel_group_from_accel_closure (slist->data))
{
/* reuse this closure */
closure = slist->data;
break;
}
if (!closure)
{
closure = g_closure_new_object (sizeof (AccelClosure), G_OBJECT (widget));
closures = g_slist_prepend (closures, g_closure_ref (closure));
g_closure_sink (closure);
g_closure_set_marshal (closure, closure_accel_activate);
}
g_object_set_qdata_full (G_OBJECT (widget), quark_accel_closures, closures, closures_destroy);
aclosure = (AccelClosure*) closure;
g_assert (closure->data == widget);
g_assert (closure->marshal == closure_accel_activate);
aclosure->signal_id = signal_id;
return closure;
}
/**
* gtk_widget_add_accelerator
* @widget: widget to install an accelerator on
* @accel_signal: widget signal to emit on accelerator activation
* @accel_group: accel group for this widget, added to its toplevel
* @accel_key: GDK keyval of the accelerator
* @accel_mods: modifier key combination of the accelerator
* @accel_flags: flag accelerators, e.g. %GTK_ACCEL_VISIBLE
*
* Installs an accelerator for this @widget in @accel_group that causes
* @accel_signal to be emitted if the accelerator is activated.
* The @accel_group needs to be added to the widget's toplevel via
* gtk_window_add_accel_group(), and the signal must be of type %G_RUN_ACTION.
* Accelerators added through this function are not user changeable during
* runtime. If you want to support accelerators that can be changed by the
* user, use gtk_accel_map_add_entry() and gtk_widget_set_accel_path() or
* gtk_menu_item_set_accel_path() instead.
*/
void
gtk_widget_add_accelerator (GtkWidget *widget,
const gchar *accel_signal,
GtkAccelGroup *accel_group,
guint accel_key,
GdkModifierType accel_mods,
GtkAccelFlags accel_flags)
{
GClosure *closure;
GSignalQuery query;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (accel_signal != NULL);
g_return_if_fail (GTK_IS_ACCEL_GROUP (accel_group));
g_signal_query (g_signal_lookup (accel_signal, G_OBJECT_TYPE (widget)), &query);
if (!query.signal_id ||
!(query.signal_flags & G_SIGNAL_ACTION) ||
query.return_type != G_TYPE_NONE ||
query.n_params)
{
/* hmm, should be elaborate enough */
g_warning (G_STRLOC ": widget `%s' has no activatable signal \"%s\" without arguments",
G_OBJECT_TYPE_NAME (widget), accel_signal);
return;
}
closure = widget_new_accel_closure (widget, query.signal_id);
g_object_ref (widget);
/* install the accelerator. since we don't map this onto an accel_path,
* the accelerator will automatically be locked.
*/
gtk_accel_group_connect (accel_group,
accel_key,
accel_mods,
accel_flags | GTK_ACCEL_LOCKED,
closure);
g_signal_emit (widget, widget_signals[ACCEL_CLOSURES_CHANGED], 0);
g_object_unref (widget);
}
/**
* gtk_widget_remove_accelerator:
* @widget: widget to install an accelerator on
* @accel_group: accel group for this widget
* @accel_key: GDK keyval of the accelerator
* @accel_mods: modifier key combination of the accelerator
* @returns: whether an accelerator was installed and could be removed
*
* Removes an accelerator from @widget, previously installed with
* gtk_widget_add_accelerator().
*/
gboolean
gtk_widget_remove_accelerator (GtkWidget *widget,
GtkAccelGroup *accel_group,
guint accel_key,
GdkModifierType accel_mods)
{
GtkAccelGroupEntry *ag_entry;
GList *slist, *clist;
guint n;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_ACCEL_GROUP (accel_group), FALSE);
ag_entry = gtk_accel_group_query (accel_group, accel_key, accel_mods, &n);
clist = gtk_widget_list_accel_closures (widget);
for (slist = clist; slist; slist = slist->next)
{
guint i;
for (i = 0; i < n; i++)
if (slist->data == (gpointer) ag_entry[i].closure)
{
gboolean is_removed = gtk_accel_group_disconnect (accel_group, slist->data);
g_signal_emit (widget, widget_signals[ACCEL_CLOSURES_CHANGED], 0);
g_list_free (clist);
return is_removed;
}
}
g_list_free (clist);
g_warning (G_STRLOC ": no accelerator (%u,%u) installed in accel group (%p) for %s (%p)",
accel_key, accel_mods, accel_group,
G_OBJECT_TYPE_NAME (widget), widget);
return FALSE;
}
/**
* gtk_widget_list_accel_closures
* @widget: widget to list accelerator closures for
* @returns: a newly allocated #GList of closures
*
* Lists the closures used by @widget for accelerator group connections
* with gtk_accel_group_connect_by_path() or gtk_accel_group_connect().
* The closures can be used to monitor accelerator changes on @widget,
* by connecting to the ::accel_changed signal of the #GtkAccelGroup of a
* closure which can be found out with gtk_accel_group_from_accel_closure().
*/
GList*
gtk_widget_list_accel_closures (GtkWidget *widget)
{
GSList *slist;
GList *clist = NULL;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
for (slist = g_object_get_qdata (G_OBJECT (widget), quark_accel_closures); slist; slist = slist->next)
if (gtk_accel_group_from_accel_closure (slist->data))
clist = g_list_prepend (clist, slist->data);
return clist;
}
typedef struct {
GQuark path_quark;
GtkWidget *widget;
GtkAccelGroup *accel_group;
GClosure *closure;
} AccelPath;
static void
destroy_accel_path (gpointer data)
{
AccelPath *apath = data;
gtk_accel_group_disconnect (apath->accel_group, apath->closure);
/* closures_destroy takes care of unrefing the closure */
g_object_unref (apath->accel_group);
g_free (apath);
}
/**
* gtk_widget_set_accel_path:
* @widget: a #GtkWidget
* @accel_path: path used to look up the the accelerator
* @accel_group: a #GtkAccelGroup.
*
* Given an accelerator group, @accel_group, and an accelerator path,
* @accel_path, sets up an accelerator in @accel_group so whenever the
* key binding that is defined for @accel_path is pressed, @widget
* will be activated. This removes any accelerators (for any
* accelerator group) installed by previous calls to
* gtk_widget_set_accel_path(). Associating accelerators with
* paths allows them to be modified by the user and the modifications
* to be saved for future use. (See gtk_accel_map_save().)
*
* This function is a low level function that would most likely
* be used by a menu creation system like #GtkItemFactory. If you
* use #GtkItemFactory, setting up accelerator paths will be done
* automatically.
*
* Even when you you aren't using #GtkItemFactory, if you only want to
* set up accelerators on menu items gtk_menu_item_set_accel_path()
* provides a somewhat more convenient interface.
**/
void
gtk_widget_set_accel_path (GtkWidget *widget,
const gchar *accel_path,
GtkAccelGroup *accel_group)
{
AccelPath *apath;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_GET_CLASS (widget)->activate_signal != 0);
if (accel_path)
{
g_return_if_fail (GTK_IS_ACCEL_GROUP (accel_group));
g_return_if_fail (_gtk_accel_path_is_valid (accel_path));
gtk_accel_map_add_entry (accel_path, 0, 0);
apath = g_new (AccelPath, 1);
apath->widget = widget;
apath->accel_group = g_object_ref (accel_group);
apath->path_quark = g_quark_from_string (accel_path);
apath->closure = widget_new_accel_closure (apath->widget, GTK_WIDGET_GET_CLASS (apath->widget)->activate_signal);
}
else
apath = NULL;
/* also removes possible old settings */
g_object_set_qdata_full (G_OBJECT (widget), quark_accel_path, apath, destroy_accel_path);
if (apath)
gtk_accel_group_connect_by_path (apath->accel_group, g_quark_to_string (apath->path_quark), apath->closure);
g_signal_emit (widget, widget_signals[ACCEL_CLOSURES_CHANGED], 0);
}
const gchar*
_gtk_widget_get_accel_path (GtkWidget *widget,
gboolean *locked)
{
AccelPath *apath;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
apath = g_object_get_qdata (G_OBJECT (widget), quark_accel_path);
if (locked)
*locked = apath ? apath->accel_group->lock_count > 0 : TRUE;
return apath ? g_quark_to_string (apath->path_quark) : NULL;
}
gboolean
gtk_widget_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
gboolean handled;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
group_cycling = group_cycling != FALSE;
if (!GTK_WIDGET_IS_SENSITIVE (widget))
handled = TRUE;
else
g_signal_emit (widget,
widget_signals[MNEMONIC_ACTIVATE],
0,
group_cycling,
&handled);
return handled;
}
static gboolean
gtk_widget_real_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
if (!group_cycling && GTK_WIDGET_GET_CLASS (widget)->activate_signal)
gtk_widget_activate (widget);
else if (GTK_WIDGET_CAN_FOCUS (widget))
gtk_widget_grab_focus (widget);
else
{
g_warning ("widget `%s' isn't suitable for mnemonic activation",
G_OBJECT_TYPE_NAME (widget));
gdk_display_beep (gtk_widget_get_display (widget));
}
return TRUE;
}
static gboolean
gtk_widget_real_key_press_event (GtkWidget *widget,
GdkEventKey *event)
{
return _gtk_bindings_activate_event (GTK_OBJECT (widget), event);
}
static gboolean
gtk_widget_real_key_release_event (GtkWidget *widget,
GdkEventKey *event)
{
return _gtk_bindings_activate_event (GTK_OBJECT (widget), event);
}
static gboolean
gtk_widget_real_focus_in_event (GtkWidget *widget,
GdkEventFocus *event)
{
gtk_widget_queue_draw (widget);
return FALSE;
}
static gboolean
gtk_widget_real_focus_out_event (GtkWidget *widget,
GdkEventFocus *event)
{
gtk_widget_queue_draw (widget);
return FALSE;
}
#define WIDGET_REALIZED_FOR_EVENT(widget, event) \
(event->type == GDK_FOCUS_CHANGE || GTK_WIDGET_REALIZED(widget))
/**
* gtk_widget_event:
* @widget: a #GtkWidget
* @event: a #GdkEvent
*
* Rarely-used function. This function is used to emit
* the event signals on a widget (those signals should never
* be emitted without using this function to do so).
* If you want to synthesize an event though, don't use this function;
* instead, use gtk_main_do_event() so the event will behave as if
* it were in the event queue. Don't synthesize expose events; instead,
* use gdk_window_invalidate_rect() to invalidate a region of the
* window.
*
* Return value: return from the event signal emission (%TRUE if the event was handled)
**/
gboolean
gtk_widget_event (GtkWidget *widget,
GdkEvent *event)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), TRUE);
g_return_val_if_fail (WIDGET_REALIZED_FOR_EVENT (widget, event), TRUE);
if (event->type == GDK_EXPOSE)
{
g_warning ("Events of type GDK_EXPOSE cannot be synthesized. To get "
"the same effect, call gdk_window_invalidate_rect/region(), "
"followed by gdk_window_process_updates().");
return TRUE;
}
return gtk_widget_event_internal (widget, event);
}
/**
* gtk_widget_send_expose:
* @widget: a #GtkWidget
* @event: a expose #GdkEvent
*
* Very rarely-used function. This function is used to emit
* an expose event signals on a widget. This function is not
* normally used directly. The only time it is used is when
* propagating an expose event to a child %NO_WINDOW widget, and
* that is normally done using gtk_container_propagate_expose().
*
* If you want to force an area of a window to be redrawn,
* use gdk_window_invalidate_rect() or gdk_window_invalidate_region().
* To cause the redraw to be done immediately, follow that call
* with a call to gdk_window_process_updates().
*
* Return value: return from the event signal emission (%TRUE if the event was handled)
**/
gint
gtk_widget_send_expose (GtkWidget *widget,
GdkEvent *event)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), TRUE);
g_return_val_if_fail (GTK_WIDGET_REALIZED (widget), TRUE);
g_return_val_if_fail (event != NULL, TRUE);
g_return_val_if_fail (event->type == GDK_EXPOSE, TRUE);
if (event->type != GDK_EXPOSE)
return TRUE;
return gtk_widget_event_internal (widget, event);
}
static gboolean
event_window_is_still_viewable (GdkEvent *event)
{
/* Some programs, such as gnome-theme-manager, fake widgets
* into exposing onto a pixmap by sending expose events with
* event->window pointing to a pixmap
*/
if (GDK_IS_PIXMAP (event->any.window))
return event->type == GDK_EXPOSE;
/* Check that we think the event's window is viewable before
* delivering the event, to prevent suprises. We do this here
* at the last moment, since the event may have been queued
* up behind other events, held over a recursive main loop, etc.
*/
switch (event->type)
{
case GDK_EXPOSE:
case GDK_MOTION_NOTIFY:
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_KEY_PRESS:
case GDK_ENTER_NOTIFY:
case GDK_PROXIMITY_IN:
case GDK_SCROLL:
return event->any.window && gdk_window_is_viewable (event->any.window);
#if 0
/* The following events are the second half of paired events;
* we always deliver them to deal with widgets that clean up
* on the second half.
*/
case GDK_BUTTON_RELEASE:
case GDK_KEY_RELEASE:
case GDK_LEAVE_NOTIFY:
case GDK_PROXIMITY_OUT:
#endif
default:
/* Remaining events would make sense on an not-viewable window,
* or don't have an associated window.
*/
return TRUE;
}
}
static gint
gtk_widget_event_internal (GtkWidget *widget,
GdkEvent *event)
{
gboolean return_val = FALSE;
/* We check only once for is-still-visible; if someone
* hides the window in on of the signals on the widget,
* they are responsible for returning TRUE to terminate
* handling.
*/
if (!event_window_is_still_viewable (event))
return TRUE;
g_object_ref (widget);
g_signal_emit (widget, widget_signals[EVENT], 0, event, &return_val);
return_val |= !WIDGET_REALIZED_FOR_EVENT (widget, event);
if (!return_val)
{
gint signal_num;
switch (event->type)
{
case GDK_NOTHING:
signal_num = -1;
break;
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
signal_num = BUTTON_PRESS_EVENT;
break;
case GDK_SCROLL:
signal_num = SCROLL_EVENT;
break;
case GDK_BUTTON_RELEASE:
signal_num = BUTTON_RELEASE_EVENT;
break;
case GDK_MOTION_NOTIFY:
signal_num = MOTION_NOTIFY_EVENT;
break;
case GDK_DELETE:
signal_num = DELETE_EVENT;
break;
case GDK_DESTROY:
signal_num = DESTROY_EVENT;
break;
case GDK_KEY_PRESS:
signal_num = KEY_PRESS_EVENT;
break;
case GDK_KEY_RELEASE:
signal_num = KEY_RELEASE_EVENT;
break;
case GDK_ENTER_NOTIFY:
signal_num = ENTER_NOTIFY_EVENT;
break;
case GDK_LEAVE_NOTIFY:
signal_num = LEAVE_NOTIFY_EVENT;
break;
case GDK_FOCUS_CHANGE:
signal_num = event->focus_change.in ? FOCUS_IN_EVENT : FOCUS_OUT_EVENT;
break;
case GDK_CONFIGURE:
signal_num = CONFIGURE_EVENT;
break;
case GDK_MAP:
signal_num = MAP_EVENT;
break;
case GDK_UNMAP:
signal_num = UNMAP_EVENT;
break;
case GDK_WINDOW_STATE:
signal_num = WINDOW_STATE_EVENT;
break;
case GDK_PROPERTY_NOTIFY:
signal_num = PROPERTY_NOTIFY_EVENT;
break;
case GDK_SELECTION_CLEAR:
signal_num = SELECTION_CLEAR_EVENT;
break;
case GDK_SELECTION_REQUEST:
signal_num = SELECTION_REQUEST_EVENT;
break;
case GDK_SELECTION_NOTIFY:
signal_num = SELECTION_NOTIFY_EVENT;
break;
case GDK_PROXIMITY_IN:
signal_num = PROXIMITY_IN_EVENT;
break;
case GDK_PROXIMITY_OUT:
signal_num = PROXIMITY_OUT_EVENT;
break;
case GDK_NO_EXPOSE:
signal_num = NO_EXPOSE_EVENT;
break;
case GDK_CLIENT_EVENT:
signal_num = CLIENT_EVENT;
break;
case GDK_EXPOSE:
signal_num = EXPOSE_EVENT;
break;
case GDK_VISIBILITY_NOTIFY:
signal_num = VISIBILITY_NOTIFY_EVENT;
break;
default:
g_warning ("gtk_widget_event(): unhandled event type: %d", event->type);
signal_num = -1;
break;
}
if (signal_num != -1)
g_signal_emit (widget, widget_signals[signal_num], 0, event, &return_val);
}
if (WIDGET_REALIZED_FOR_EVENT (widget, event))
g_signal_emit (widget, widget_signals[EVENT_AFTER], 0, event);
else
return_val = TRUE;
g_object_unref (widget);
return return_val;
}
/**
* gtk_widget_activate:
* @widget: a #GtkWidget that's activatable
*
* For widgets that can be "activated" (buttons, menu items, etc.)
* this function activates them. Activation is what happens when you
* press Enter on a widget during key navigation; clicking a button,
* selecting a menu item, etc. If @widget isn't activatable,
* the function returns %FALSE.
*
* Return value: %TRUE if the widget was activatable
**/
gboolean
gtk_widget_activate (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (WIDGET_CLASS (widget)->activate_signal)
{
/* FIXME: we should eventually check the signals signature here */
g_signal_emit (widget, WIDGET_CLASS (widget)->activate_signal, 0);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_widget_set_scroll_adjustments:
* @widget: a #GtkWidget
* @hadjustment: an adjustment for horizontal scrolling, or %NULL
* @vadjustment: an adjustment for vertical scrolling, or %NULL
*
* For widgets that support scrolling, sets the scroll adjustments and
* returns %TRUE. For widgets that don't support scrolling, does
* nothing and returns %FALSE. Widgets that don't support scrolling
* can be scrolled by placing them in a #GtkViewport, which does
* support scrolling.
*
* Return value: %TRUE if the widget supports scrolling
**/
gboolean
gtk_widget_set_scroll_adjustments (GtkWidget *widget,
GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (hadjustment)
g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), FALSE);
if (vadjustment)
g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), FALSE);
if (WIDGET_CLASS (widget)->set_scroll_adjustments_signal)
{
/* FIXME: we should eventually check the signals signature here */
g_signal_emit (widget,
WIDGET_CLASS (widget)->set_scroll_adjustments_signal, 0,
hadjustment, vadjustment);
return TRUE;
}
else
return FALSE;
}
static void
gtk_widget_reparent_subwindows (GtkWidget *widget,
GdkWindow *new_window)
{
if (GTK_WIDGET_NO_WINDOW (widget))
{
GList *children = gdk_window_get_children (widget->window);
GList *tmp_list;
for (tmp_list = children; tmp_list; tmp_list = tmp_list->next)
{
GtkWidget *child;
GdkWindow *window = tmp_list->data;
gdk_window_get_user_data (window, (void **)&child);
while (child && child != widget)
child = child->parent;
if (child)
gdk_window_reparent (window, new_window, 0, 0);
}
g_list_free (children);
}
else
gdk_window_reparent (widget->window, new_window, 0, 0);
}
static void
gtk_widget_reparent_fixup_child (GtkWidget *widget,
gpointer client_data)
{
g_return_if_fail (client_data != NULL);
if (GTK_WIDGET_NO_WINDOW (widget))
{
if (widget->window)
g_object_unref (widget->window);
widget->window = (GdkWindow*) client_data;
if (widget->window)
g_object_ref (widget->window);
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
gtk_widget_reparent_fixup_child,
client_data);
}
}
/**
* gtk_widget_reparent:
* @widget: a #GtkWidget
* @new_parent: a #GtkContainer to move the widget into
*
* Moves a widget from one #GtkContainer to another, handling reference
* count issues to avoid destroying the widget.
*
**/
void
gtk_widget_reparent (GtkWidget *widget,
GtkWidget *new_parent)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_CONTAINER (new_parent));
g_return_if_fail (widget->parent != NULL);
if (widget->parent != new_parent)
{
/* First try to see if we can get away without unrealizing
* the widget as we reparent it. if so we set a flag so
* that gtk_widget_unparent doesn't unrealize widget
*/
if (GTK_WIDGET_REALIZED (widget) && GTK_WIDGET_REALIZED (new_parent))
GTK_PRIVATE_SET_FLAG (widget, GTK_IN_REPARENT);
g_object_ref (widget);
gtk_container_remove (GTK_CONTAINER (widget->parent), widget);
gtk_container_add (GTK_CONTAINER (new_parent), widget);
g_object_unref (widget);
if (GTK_WIDGET_IN_REPARENT (widget))
{
GTK_PRIVATE_UNSET_FLAG (widget, GTK_IN_REPARENT);
gtk_widget_reparent_subwindows (widget, gtk_widget_get_parent_window (widget));
gtk_widget_reparent_fixup_child (widget,
gtk_widget_get_parent_window (widget));
}
g_object_notify (G_OBJECT (widget), "parent");
}
}
/**
* gtk_widget_intersect:
* @widget: a #GtkWidget
* @area: a rectangle
* @intersection: rectangle to store intersection of @widget and @area
*
* Computes the intersection of a @widget's area and @area, storing
* the intersection in @intersection, and returns %TRUE if there was
* an intersection. @intersection may be %NULL if you're only
* interested in whether there was an intersection.
*
* Return value: %TRUE if there was an intersection
**/
gboolean
gtk_widget_intersect (GtkWidget *widget,
GdkRectangle *area,
GdkRectangle *intersection)
{
GdkRectangle *dest;
GdkRectangle tmp;
gint return_val;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (area != NULL, FALSE);
if (intersection)
dest = intersection;
else
dest = &tmp;
return_val = gdk_rectangle_intersect (&widget->allocation, area, dest);
if (return_val && intersection && !GTK_WIDGET_NO_WINDOW (widget))
{
intersection->x -= widget->allocation.x;
intersection->y -= widget->allocation.y;
}
return return_val;
}
/**
* gtk_widget_region_intersect:
* @widget: a #GtkWidget
* @region: a #GdkRegion, in the same coordinate system as
* @widget->allocation. That is, relative to @widget->window
* for %NO_WINDOW widgets; relative to the parent window
* of @widget->window for widgets with their own window.
* @returns: A newly allocated region holding the intersection of @widget
* and @region. The coordinates of the return value are
* relative to @widget->window for %NO_WINDOW widgets, and
* relative to the parent window of @widget->window for
* widgets with their own window.
*
* Computes the intersection of a @widget's area and @region, returning
* the intersection. The result may be empty, use gdk_region_empty() to
* check.
**/
GdkRegion *
gtk_widget_region_intersect (GtkWidget *widget,
GdkRegion *region)
{
GdkRegion *dest;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (region != NULL, NULL);
dest = gdk_region_rectangle (&widget->allocation);
gdk_region_intersect (dest, region);
return dest;
}
/**
* gtk_widget_grab_focus:
* @widget: a #GtkWidget
*
* Causes @widget to have the keyboard focus for the #GtkWindow it's
* inside. @widget must be a focusable widget, such as a #GtkEntry;
* something like #GtkFrame won't work. (More precisely, it must have the
* %GTK_CAN_FOCUS flag set.)
*
**/
void
gtk_widget_grab_focus (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!GTK_WIDGET_IS_SENSITIVE (widget))
return;
g_object_ref (widget);
g_signal_emit (widget, widget_signals[GRAB_FOCUS], 0);
g_object_notify (G_OBJECT (widget), "has_focus");
g_object_unref (widget);
}
static void
reset_focus_recurse (GtkWidget *widget,
gpointer data)
{
if (GTK_IS_CONTAINER (widget))
{
GtkContainer *container;
container = GTK_CONTAINER (widget);
gtk_container_set_focus_child (container, NULL);
gtk_container_foreach (container,
reset_focus_recurse,
NULL);
}
}
static void
gtk_widget_real_grab_focus (GtkWidget *focus_widget)
{
if (GTK_WIDGET_CAN_FOCUS (focus_widget))
{
GtkWidget *toplevel;
GtkWidget *widget;
/* clear the current focus setting, break if the current widget
* is the focus widget's parent, since containers above that will
* be set by the next loop.
*/
toplevel = gtk_widget_get_toplevel (focus_widget);
if (GTK_WIDGET_TOPLEVEL (toplevel))
{
widget = GTK_WINDOW (toplevel)->focus_widget;
if (widget == focus_widget)
{
/* We call _gtk_window_internal_set_focus() here so that the
* toplevel window can request the focus if necessary.
* This is needed when the toplevel is a GtkPlug
*/
if (!GTK_WIDGET_HAS_FOCUS (widget))
_gtk_window_internal_set_focus (GTK_WINDOW (toplevel), focus_widget);
return;
}
if (widget)
{
while (widget->parent && widget->parent != focus_widget->parent)
{
widget = widget->parent;
gtk_container_set_focus_child (GTK_CONTAINER (widget), NULL);
}
}
}
else if (toplevel != focus_widget)
{
/* gtk_widget_grab_focus() operates on a tree without window...
* actually, this is very questionable behaviour.
*/
gtk_container_foreach (GTK_CONTAINER (toplevel),
reset_focus_recurse,
NULL);
}
/* now propagate the new focus up the widget tree and finally
* set it on the window
*/
widget = focus_widget;
while (widget->parent)
{
gtk_container_set_focus_child (GTK_CONTAINER (widget->parent), widget);
widget = widget->parent;
}
if (GTK_IS_WINDOW (widget))
_gtk_window_internal_set_focus (GTK_WINDOW (widget), focus_widget);
}
}
static gboolean
gtk_widget_real_show_help (GtkWidget *widget,
GtkWidgetHelpType help_type)
{
if (help_type == GTK_WIDGET_HELP_TOOLTIP)
{
_gtk_tooltips_toggle_keyboard_mode (widget);
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_widget_real_focus (GtkWidget *widget,
GtkDirectionType direction)
{
if (!GTK_WIDGET_CAN_FOCUS (widget))
return FALSE;
if (!gtk_widget_is_focus (widget))
{
gtk_widget_grab_focus (widget);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_widget_is_focus:
* @widget: a #GtkWidget
*
* Determines if the widget is the focus widget within its
* toplevel. (This does not mean that the %HAS_FOCUS flag is
* necessarily set; %HAS_FOCUS will only be set if the
* toplevel widget additionally has the global input focus.)
*
* Return value: %TRUE if the widget is the focus widget.
**/
gboolean
gtk_widget_is_focus (GtkWidget *widget)
{
GtkWidget *toplevel;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
toplevel = gtk_widget_get_toplevel (widget);
if (GTK_IS_WINDOW (toplevel))
return widget == GTK_WINDOW (toplevel)->focus_widget;
else
return FALSE;
}
/**
* gtk_widget_grab_default:
* @widget: a #GtkWidget
*
* Causes @widget to become the default widget. @widget must have the
* %GTK_CAN_DEFAULT flag set; typically you have to set this flag
* yourself by calling <literal>GTK_WIDGET_SET_FLAGS (@widget,
* GTK_CAN_DEFAULT)</literal>. The default widget is activated when the user
* presses Enter in a window. Default widgets must be activatable,
* that is, gtk_widget_activate() should affect them.
*
**/
void
gtk_widget_grab_default (GtkWidget *widget)
{
GtkWidget *window;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_CAN_DEFAULT (widget));
window = gtk_widget_get_toplevel (widget);
if (window && GTK_WIDGET_TOPLEVEL (window))
gtk_window_set_default (GTK_WINDOW (window), widget);
else
g_warning (G_STRLOC ": widget not within a GtkWindow");
}
/**
* gtk_widget_set_name:
* @widget: a #GtkWidget
* @name: name for the widget
*
* Widgets can be named, which allows you to refer to them from a
* gtkrc file. You can apply a style to widgets with a particular name
* in the gtkrc file. See the documentation for gtkrc files (on the
* same page as the docs for #GtkRcStyle).
*
* Note that widget names are separated by periods in paths (see
* gtk_widget_path()), so names with embedded periods may cause confusion.
**/
void
gtk_widget_set_name (GtkWidget *widget,
const gchar *name)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (widget->name)
g_free (widget->name);
widget->name = g_strdup (name);
if (GTK_WIDGET_RC_STYLE (widget))
gtk_widget_reset_rc_style (widget);
g_object_notify (G_OBJECT (widget), "name");
}
/**
* gtk_widget_get_name:
* @widget: a #GtkWidget
*
* Retrieves the name of a widget. See gtk_widget_set_name() for the
* significance of widget names.
*
* Return value: name of the widget. This string is owned by GTK+ and
* should not be modified or freed
**/
G_CONST_RETURN gchar*
gtk_widget_get_name (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (widget->name)
return widget->name;
return g_type_name (GTK_WIDGET_TYPE (widget));
}
/**
* gtk_widget_set_state:
* @widget: a #GtkWidget
* @state: new state for @widget
*
* This function is for use in widget implementations. Sets the state
* of a widget (insensitive, prelighted, etc.) Usually you should set
* the state using wrapper functions such as gtk_widget_set_sensitive().
*
**/
void
gtk_widget_set_state (GtkWidget *widget,
GtkStateType state)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (state == GTK_WIDGET_STATE (widget))
return;
if (state == GTK_STATE_INSENSITIVE)
gtk_widget_set_sensitive (widget, FALSE);
else
{
GtkStateData data;
data.state = state;
data.state_restoration = FALSE;
data.use_forall = FALSE;
if (widget->parent)
data.parent_sensitive = (GTK_WIDGET_IS_SENSITIVE (widget->parent) != FALSE);
else
data.parent_sensitive = TRUE;
gtk_widget_propagate_state (widget, &data);
if (GTK_WIDGET_DRAWABLE (widget))
gtk_widget_queue_draw (widget);
}
}
void
gtk_widget_set_app_paintable (GtkWidget *widget,
gboolean app_paintable)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
app_paintable = (app_paintable != FALSE);
if (GTK_WIDGET_APP_PAINTABLE (widget) != app_paintable)
{
if (app_paintable)
GTK_WIDGET_SET_FLAGS (widget, GTK_APP_PAINTABLE);
else
GTK_WIDGET_UNSET_FLAGS (widget, GTK_APP_PAINTABLE);
if (GTK_WIDGET_DRAWABLE (widget))
gtk_widget_queue_draw (widget);
g_object_notify (G_OBJECT (widget), "app_paintable");
}
}
/**
* gtk_widget_set_double_buffered:
* @widget: a #GtkWidget
* @double_buffered: %TRUE to double-buffer a widget
*
* Widgets are double buffered by default; you can use this function
* to turn off the buffering. "Double buffered" simply means that
* gdk_window_begin_paint_region() and gdk_window_end_paint() are called
* automatically around expose events sent to the
* widget. gdk_window_begin_paint() diverts all drawing to a widget's
* window to an offscreen buffer, and gdk_window_end_paint() draws the
* buffer to the screen. The result is that users see the window
* update in one smooth step, and don't see individual graphics
* primitives being rendered.
*
* In very simple terms, double buffered widgets don't flicker,
* so you would only use this function to turn off double buffering
* if you had special needs and really knew what you were doing.
*
**/
void
gtk_widget_set_double_buffered (GtkWidget *widget,
gboolean double_buffered)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (double_buffered)
GTK_WIDGET_SET_FLAGS (widget, GTK_DOUBLE_BUFFERED);
else
GTK_WIDGET_UNSET_FLAGS (widget, GTK_DOUBLE_BUFFERED);
}
/**
* gtk_widget_set_redraw_on_allocate:
* @widget: a #GtkWidget
* @redraw_on_allocate: if %TRUE, the entire widget will be redrawn
* when it is allocated to a new size. Otherwise, only the
* new portion of the widget will be redrawn.
*
* Sets whether a when a widgets size allocation changes, the entire
* widget is queued for drawing. By default, this setting is %TRUE and
* the entire widget is redrawn on every size change. If your widget
* leaves the upper left are unchanged when made bigger, turning this
* setting on will improve performance.
* Note that for %NO_WINDOW widgets setting this flag to %FALSE turns
* off all allocation on resizing: the widget will not even redraw if
* its position changes; this is to allow containers that don't draw
* anything to avoid excess invalidations. If you set this flag on a
* %NO_WINDOW widget that <emphasis>does</emphasis> draw on @widget->window,
* you are responsible for invalidating both the old and new allocation
* of the widget when the widget is moved and responsible for invalidating
* regions newly when the widget increases size.
**/
void
gtk_widget_set_redraw_on_allocate (GtkWidget *widget,
gboolean redraw_on_allocate)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (redraw_on_allocate)
GTK_PRIVATE_SET_FLAG (widget, GTK_REDRAW_ON_ALLOC);
else
GTK_PRIVATE_UNSET_FLAG (widget, GTK_REDRAW_ON_ALLOC);
}
/**
* gtk_widget_set_sensitive:
* @widget: a #GtkWidget
* @sensitive: %TRUE to make the widget sensitive
*
* Sets the sensitivity of a widget. A widget is sensitive if the user
* can interact with it. Insensitive widgets are "grayed out" and the
* user can't interact with them. Insensitive widgets are known as
* "inactive", "disabled", or "ghosted" in some other toolkits.
*
**/
void
gtk_widget_set_sensitive (GtkWidget *widget,
gboolean sensitive)
{
GtkStateData data;
g_return_if_fail (GTK_IS_WIDGET (widget));
sensitive = (sensitive != FALSE);
if (sensitive == (GTK_WIDGET_SENSITIVE (widget) != FALSE))
return;
if (sensitive)
{
GTK_WIDGET_SET_FLAGS (widget, GTK_SENSITIVE);
data.state = GTK_WIDGET_SAVED_STATE (widget);
}
else
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_SENSITIVE);
data.state = GTK_WIDGET_STATE (widget);
}
data.state_restoration = TRUE;
data.use_forall = TRUE;
if (widget->parent)
data.parent_sensitive = (GTK_WIDGET_IS_SENSITIVE (widget->parent) != FALSE);
else
data.parent_sensitive = TRUE;
gtk_widget_propagate_state (widget, &data);
if (GTK_WIDGET_DRAWABLE (widget))
gtk_widget_queue_draw (widget);
g_object_notify (G_OBJECT (widget), "sensitive");
}
/**
* gtk_widget_set_parent:
* @widget: a #GtkWidget
* @parent: parent container
*
* This function is useful only when implementing subclasses of #GtkContainer.
* Sets the container as the parent of @widget, and takes care of
* some details such as updating the state and style of the child
* to reflect its new location. The opposite function is
* gtk_widget_unparent().
*
**/
void
gtk_widget_set_parent (GtkWidget *widget,
GtkWidget *parent)
{
GtkStateData data;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == NULL);
g_return_if_fail (!GTK_WIDGET_TOPLEVEL (widget));
g_return_if_fail (GTK_IS_WIDGET (parent));
g_return_if_fail (widget != parent);
/* keep this function in sync with gtk_menu_attach_to_widget()
*/
g_object_ref (widget);
gtk_object_sink (GTK_OBJECT (widget));
widget->parent = parent;
if (GTK_WIDGET_STATE (parent) != GTK_STATE_NORMAL)
data.state = GTK_WIDGET_STATE (parent);
else
data.state = GTK_WIDGET_STATE (widget);
data.state_restoration = FALSE;
data.parent_sensitive = (GTK_WIDGET_IS_SENSITIVE (parent) != FALSE);
data.use_forall = GTK_WIDGET_IS_SENSITIVE (parent) != GTK_WIDGET_IS_SENSITIVE (widget);
gtk_widget_propagate_state (widget, &data);
gtk_widget_reset_rc_styles (widget);
g_signal_emit (widget, widget_signals[PARENT_SET], 0, NULL);
if (GTK_WIDGET_ANCHORED (widget->parent))
_gtk_widget_propagate_hierarchy_changed (widget, NULL);
g_object_notify (G_OBJECT (widget), "parent");
/* Enforce realized/mapped invariants
*/
if (GTK_WIDGET_REALIZED (widget->parent))
gtk_widget_realize (widget);
if (GTK_WIDGET_VISIBLE (widget->parent) &&
GTK_WIDGET_VISIBLE (widget))
{
if (GTK_WIDGET_CHILD_VISIBLE (widget) &&
GTK_WIDGET_MAPPED (widget->parent))
gtk_widget_map (widget);
gtk_widget_queue_resize (widget);
}
}
/**
* gtk_widget_get_parent:
* @widget: a #GtkWidget
*
* Returns the parent container of @widget.
*
* Return value: the parent container of @widget, or %NULL
**/
GtkWidget *
gtk_widget_get_parent (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return widget->parent;
}
/*****************************************
* Widget styles
* see docs/styles.txt
*****************************************/
/**
* gtk_widget_set_style:
* @widget: a #GtkWidget
* @style: a #GtkStyle, or %NULL to remove the effect of a previous
* gtk_widget_set_style() and go back to the default style
*
* Sets the #GtkStyle for a widget (@widget->style). You probably don't
* want to use this function; it interacts badly with themes, because
* themes work by replacing the #GtkStyle. Instead, use
* gtk_widget_modify_style().
*
**/
void
gtk_widget_set_style (GtkWidget *widget,
GtkStyle *style)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (style)
{
gboolean initial_emission;
initial_emission = !GTK_WIDGET_RC_STYLE (widget) && !GTK_WIDGET_USER_STYLE (widget);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_RC_STYLE);
GTK_PRIVATE_SET_FLAG (widget, GTK_USER_STYLE);
gtk_widget_set_style_internal (widget, style, initial_emission);
}
else
{
if (GTK_WIDGET_USER_STYLE (widget))
gtk_widget_reset_rc_style (widget);
}
}
/**
* gtk_widget_ensure_style:
* @widget: a #GtkWidget
*
* Ensures that @widget has a style (@widget->style). Not a very useful
* function; most of the time, if you want the style, the widget is
* realized, and realized widgets are guaranteed to have a style
* already.
*
**/
void
gtk_widget_ensure_style (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (!GTK_WIDGET_USER_STYLE (widget) &&
!GTK_WIDGET_RC_STYLE (widget))
gtk_widget_reset_rc_style (widget);
}
/* Look up the RC style for this widget, unsetting any user style that
* may be in effect currently
**/
static void
gtk_widget_reset_rc_style (GtkWidget *widget)
{
GtkStyle *new_style = NULL;
gboolean initial_emission;
g_return_if_fail (GTK_IS_WIDGET (widget));
initial_emission = !GTK_WIDGET_RC_STYLE (widget) && !GTK_WIDGET_USER_STYLE (widget);
GTK_PRIVATE_UNSET_FLAG (widget, GTK_USER_STYLE);
GTK_WIDGET_SET_FLAGS (widget, GTK_RC_STYLE);
if (gtk_widget_has_screen (widget))
new_style = gtk_rc_get_style (widget);
if (!new_style)
new_style = gtk_widget_get_default_style ();
if (initial_emission || new_style != widget->style)
gtk_widget_set_style_internal (widget, new_style, initial_emission);
}
/**
* gtk_widget_get_style:
* @widget: a #GtkWidget
*
* Simply an accessor function that returns @widget->style.
*
* Return value: the widget's #GtkStyle
**/
GtkStyle*
gtk_widget_get_style (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return widget->style;
}
/**
* gtk_widget_modify_style:
* @widget: a #GtkWidget
* @style: the #GtkRcStyle holding the style modifications
*
* Modifies style values on the widget. Modifications made using this
* technique take precedence over style values set via an RC file,
* however, they will be overriden if a style is explicitely set on
* the widget using gtk_widget_set_style(). The #GtkRcStyle structure
* is designed so each field can either be set or unset, so it is
* possible, using this function, to modify some style values and
* leave the others unchanged.
*
* Note that modifications made with this function are not cumulative
* with previous calls to gtk_widget_modify_style() or with such
* functions as gtk_widget_modify_fg(). If you wish to retain
* previous values, you must first call gtk_widget_get_modifier_style(),
* make your modifications to the returned style, then call
* gtk_widget_modify_style() with that style. On the other hand,
* if you first call gtk_widget_modify_style(), subsequent calls
* to such functions gtk_widget_modify_fg() will have a cumulative
* effect with the initial modifications.
**/
void
gtk_widget_modify_style (GtkWidget *widget,
GtkRcStyle *style)
{
GtkRcStyle *old_style;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_RC_STYLE (style));
old_style = g_object_get_qdata (G_OBJECT (widget), quark_rc_style);
g_object_set_qdata_full (G_OBJECT (widget),
quark_rc_style,
gtk_rc_style_copy (style),
(GDestroyNotify) gtk_rc_style_unref);
/* note that "style" may be invalid here if it was the old
* modifier style and the only reference was our own.
*/
if (GTK_WIDGET_RC_STYLE (widget))
gtk_widget_reset_rc_style (widget);
}
/**
* gtk_widget_get_modifier_style:
* @widget: a #GtkWidget
*
* Returns the current modifier style for the widget. (As set by
* gtk_widget_modify_style().) If no style has previously set, a new
* #GtkRcStyle will be created with all values unset, and set as the
* modifier style for the widget. If you make changes to this rc
* style, you must call gtk_widget_modify_style(), passing in the
* returned rc style, to make sure that your changes take effect.
*
* Caution: passing the style back to gtk_widget_modify_style() will
* normally end up destroying it, because gtk_widget_modify_style() copies
* the passed-in style and sets the copy as the new modifier style,
* thus dropping any reference to the old modifier style. Add a reference
* to the modifier style if you want to keep it alive.
*
* Return value: the modifier style for the widget. This rc style is
* owned by the widget. If you want to keep a pointer to value this
* around, you must add a refcount using gtk_rc_style_ref().
**/
GtkRcStyle *
gtk_widget_get_modifier_style (GtkWidget *widget)
{
GtkRcStyle *rc_style;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
rc_style = g_object_get_qdata (G_OBJECT (widget), quark_rc_style);
if (!rc_style)
{
rc_style = gtk_rc_style_new ();
g_object_set_qdata_full (G_OBJECT (widget),
quark_rc_style,
rc_style,
(GDestroyNotify) gtk_rc_style_unref);
}
return rc_style;
}
static void
gtk_widget_modify_color_component (GtkWidget *widget,
GtkRcFlags component,
GtkStateType state,
GdkColor *color)
{
GtkRcStyle *rc_style = gtk_widget_get_modifier_style (widget);
if (color)
{
switch (component)
{
case GTK_RC_FG:
rc_style->fg[state] = *color;
break;
case GTK_RC_BG:
rc_style->bg[state] = *color;
break;
case GTK_RC_TEXT:
rc_style->text[state] = *color;
break;
case GTK_RC_BASE:
rc_style->base[state] = *color;
break;
default:
g_assert_not_reached();
}
rc_style->color_flags[state] |= component;
}
else
rc_style->color_flags[state] &= ~component;
gtk_widget_modify_style (widget, rc_style);
}
/**
* gtk_widget_modify_fg:
* @widget: a #GtkWidget.
* @state: the state for which to set the foreground color.
* @color: the color to assign (does not need to be allocated),
* or %NULL to undo the effect of previous calls to
* of gtk_widget_modify_fg().
*
* Sets the foreground color for a widget in a particular state. All
* other style values are left untouched. See also
* gtk_widget_modify_style().
**/
void
gtk_widget_modify_fg (GtkWidget *widget,
GtkStateType state,
GdkColor *color)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (state >= GTK_STATE_NORMAL && state <= GTK_STATE_INSENSITIVE);
gtk_widget_modify_color_component (widget, GTK_RC_FG, state, color);
}
/**
* gtk_widget_modify_bg:
* @widget: a #GtkWidget.
* @state: the state for which to set the background color.
* @color: the color to assign (does not need to be allocated),
* or %NULL to undo the effect of previous calls to
* of gtk_widget_modify_bg().
*
* Sets the background color for a widget in a particular state. All
* other style values are left untouched. See also
* gtk_widget_modify_style().
**/
void
gtk_widget_modify_bg (GtkWidget *widget,
GtkStateType state,
GdkColor *color)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (state >= GTK_STATE_NORMAL && state <= GTK_STATE_INSENSITIVE);
gtk_widget_modify_color_component (widget, GTK_RC_BG, state, color);
}
/**
* gtk_widget_modify_text:
* @widget: a #GtkWidget.
* @state: the state for which to set the text color.
* @color: the color to assign (does not need to be allocated),
* or %NULL to undo the effect of previous calls to
* of gtk_widget_modify_text().
*
* Sets the text color for a widget in a particular state. All other
* style values are left untouched. The text color is the foreground
* color used along with the base color (see gtk_widget_modify_base())
* for widgets such as #GtkEntry and #GtkTextView. See also
* gtk_widget_modify_style().
**/
void
gtk_widget_modify_text (GtkWidget *widget,
GtkStateType state,
GdkColor *color)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (state >= GTK_STATE_NORMAL && state <= GTK_STATE_INSENSITIVE);
gtk_widget_modify_color_component (widget, GTK_RC_TEXT, state, color);
}
/**
* gtk_widget_modify_base:
* @widget: a #GtkWidget.
* @state: the state for which to set the base color.
* @color: the color to assign (does not need to be allocated),
* or %NULL to undo the effect of previous calls to
* of gtk_widget_modify_base().
*
* Sets the base color for a widget in a particular state.
* All other style values are left untouched. The base color
* is the background color used along with the text color
* (see gtk_widget_modify_text()) for widgets such as #GtkEntry
* and #GtkTextView. See also gtk_widget_modify_style().
**/
void
gtk_widget_modify_base (GtkWidget *widget,
GtkStateType state,
GdkColor *color)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (state >= GTK_STATE_NORMAL && state <= GTK_STATE_INSENSITIVE);
gtk_widget_modify_color_component (widget, GTK_RC_BASE, state, color);
}
/**
* gtk_widget_modify_font:
* @widget: a #GtkWidget
* @font_desc: the font description to use, or %NULL to undo
* the effect of previous calls to gtk_widget_modify_font().
*
* Sets the font to use for a widget. All other style values are left
* untouched. See also gtk_widget_modify_style().
**/
void
gtk_widget_modify_font (GtkWidget *widget,
PangoFontDescription *font_desc)
{
GtkRcStyle *rc_style;
g_return_if_fail (GTK_IS_WIDGET (widget));
rc_style = gtk_widget_get_modifier_style (widget);
if (rc_style->font_desc)
pango_font_description_free (rc_style->font_desc);
if (font_desc)
rc_style->font_desc = pango_font_description_copy (font_desc);
else
rc_style->font_desc = NULL;
gtk_widget_modify_style (widget, rc_style);
}
static void
gtk_widget_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
gtk_widget_queue_resize (widget);
}
static void
gtk_widget_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
if (GTK_WIDGET_REALIZED (widget) &&
!GTK_WIDGET_NO_WINDOW (widget))
gtk_style_set_background (widget->style, widget->window, widget->state);
}
static void
gtk_widget_set_style_internal (GtkWidget *widget,
GtkStyle *style,
gboolean initial_emission)
{
g_object_ref (widget);
g_object_freeze_notify (G_OBJECT (widget));
if (widget->style != style || initial_emission)
{
PangoContext *context = gtk_widget_peek_pango_context (widget);
if (context)
pango_context_set_font_description (context, style->font_desc);
}
if (widget->style != style)
{
GtkStyle *previous_style;
if (GTK_WIDGET_REALIZED (widget))
{
gtk_widget_reset_shapes (widget);
gtk_style_detach (widget->style);
}
previous_style = widget->style;
widget->style = style;
g_object_ref (widget->style);
if (GTK_WIDGET_REALIZED (widget))
widget->style = gtk_style_attach (widget->style, widget->window);
g_signal_emit (widget,
widget_signals[STYLE_SET],
0,
initial_emission ? NULL : previous_style);
g_object_unref (previous_style);
if (widget->parent && !initial_emission)
gtk_widget_queue_resize (widget);
}
else if (initial_emission)
g_signal_emit (widget,
widget_signals[STYLE_SET],
0,
NULL);
g_object_notify (G_OBJECT (widget), "style");
g_object_thaw_notify (G_OBJECT (widget));
g_object_unref (widget);
}
typedef struct {
GtkWidget *previous_toplevel;
GdkScreen *previous_screen;
GdkScreen *new_screen;
} HierarchyChangedInfo;
static void
do_screen_change (GtkWidget *widget,
GdkScreen *old_screen,
GdkScreen *new_screen)
{
if (old_screen != new_screen)
{
if (old_screen)
{
PangoContext *context = g_object_get_qdata (G_OBJECT (widget), quark_pango_context);
if (context)
g_object_set_qdata (G_OBJECT (widget), quark_pango_context, NULL);
}
g_signal_emit (widget, widget_signals[SCREEN_CHANGED], 0, old_screen);
}
}
static void
gtk_widget_propagate_hierarchy_changed_recurse (GtkWidget *widget,
gpointer client_data)
{
gboolean new_anchored;
HierarchyChangedInfo *info = client_data;
new_anchored = GTK_WIDGET_TOPLEVEL (widget) ||
(widget->parent && GTK_WIDGET_ANCHORED (widget->parent));
if (GTK_WIDGET_ANCHORED (widget) != new_anchored)
{
g_object_ref (widget);
if (new_anchored)
GTK_PRIVATE_SET_FLAG (widget, GTK_ANCHORED);
else
GTK_PRIVATE_UNSET_FLAG (widget, GTK_ANCHORED);
g_signal_emit (widget, widget_signals[HIERARCHY_CHANGED], 0, info->previous_toplevel);
do_screen_change (widget, info->previous_screen, info->new_screen);
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
gtk_widget_propagate_hierarchy_changed_recurse,
client_data);
g_object_unref (widget);
}
}
/**
* _gtk_widget_propagate_hierarchy_changed:
* @widget: a #GtkWidget
* @previous_toplevel: Previous toplevel
*
* Propagates changes in the anchored state to a widget and all
* children, unsetting or setting the %ANCHORED flag, and
* emitting ::hierarchy_changed.
**/
void
_gtk_widget_propagate_hierarchy_changed (GtkWidget *widget,
GtkWidget *previous_toplevel)
{
HierarchyChangedInfo info;
info.previous_toplevel = previous_toplevel;
info.previous_screen = previous_toplevel ? gtk_widget_get_screen (previous_toplevel) : NULL;
if (GTK_WIDGET_TOPLEVEL (widget) ||
(widget->parent && GTK_WIDGET_ANCHORED (widget->parent)))
info.new_screen = gtk_widget_get_screen (widget);
else
info.new_screen = NULL;
if (info.previous_screen)
g_object_ref (info.previous_screen);
if (previous_toplevel)
g_object_ref (previous_toplevel);
gtk_widget_propagate_hierarchy_changed_recurse (widget, &info);
if (previous_toplevel)
g_object_unref (previous_toplevel);
if (info.previous_screen)
g_object_unref (info.previous_screen);
}
static void
gtk_widget_propagate_screen_changed_recurse (GtkWidget *widget,
gpointer client_data)
{
HierarchyChangedInfo *info = client_data;
g_object_ref (widget);
do_screen_change (widget, info->previous_screen, info->new_screen);
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
gtk_widget_propagate_screen_changed_recurse,
client_data);
g_object_unref (widget);
}
/**
* _gtk_widget_propagate_screen_changed:
* @widget: a #GtkWidget
* @previous_screen: Previous screen
*
* Propagates changes in the screen for a widget to all
* children, emitting ::screen_changed.
**/
void
_gtk_widget_propagate_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
HierarchyChangedInfo info;
info.previous_screen = previous_screen;
info.new_screen = gtk_widget_get_screen (widget);
if (previous_screen)
g_object_ref (previous_screen);
gtk_widget_propagate_screen_changed_recurse (widget, &info);
if (previous_screen)
g_object_unref (previous_screen);
}
static void
reset_rc_styles_recurse (GtkWidget *widget, gpointer data)
{
if (GTK_WIDGET_RC_STYLE (widget))
gtk_widget_reset_rc_style (widget);
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
reset_rc_styles_recurse,
NULL);
}
void
gtk_widget_reset_rc_styles (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
reset_rc_styles_recurse (widget, NULL);
}
/**
* gtk_widget_get_default_style:
*
* Returns the default style used by all widgets initially.
*
* Returns: the default style. This #GtkStyle object is owned by GTK+ and
* should not be modified or freed.
*/
GtkStyle*
gtk_widget_get_default_style (void)
{
if (!gtk_default_style)
{
gtk_default_style = gtk_style_new ();
g_object_ref (gtk_default_style);
}
return gtk_default_style;
}
static PangoContext *
gtk_widget_peek_pango_context (GtkWidget *widget)
{
return g_object_get_qdata (G_OBJECT (widget), quark_pango_context);
}
/**
* gtk_widget_get_pango_context:
* @widget: a #GtkWidget
*
* Gets a #PangoContext with the appropriate colormap, font description
* and base direction for this widget. Unlike the context returned
* by gtk_widget_create_pango_context(), this context is owned by
* the widget (it can be used until the screen for the widget changes
* or the widget is removed from its toplevel), and will be updated to
* match any changes to the widget's attributes.
*
* If you create and keep a #PangoLayout using this context, you must
* deal with changes to the context by calling pango_layout_context_changed()
* on the layout in response to the ::style_set and ::direction_set signals
* for the widget.
*
* Return value: the #PangoContext for the widget.
**/
PangoContext *
gtk_widget_get_pango_context (GtkWidget *widget)
{
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
context = g_object_get_qdata (G_OBJECT (widget), quark_pango_context);
if (!context)
{
context = gtk_widget_create_pango_context (GTK_WIDGET (widget));
g_object_set_qdata_full (G_OBJECT (widget),
quark_pango_context,
context,
g_object_unref);
}
return context;
}
/**
* gtk_widget_create_pango_context:
* @widget: a #GtkWidget
*
* Creates a new #PangoContext with the appropriate colormap,
* font description, and base direction for drawing text for
* this widget. See also gtk_widget_get_pango_context().
*
* Return value: the new #PangoContext
**/
PangoContext *
gtk_widget_create_pango_context (GtkWidget *widget)
{
GdkScreen *screen;
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
screen = gtk_widget_get_screen_unchecked (widget);
if (!screen)
{
GTK_NOTE (MULTIHEAD,
g_warning ("gtk_widget_create_pango_context ()) called without screen"));
screen = gdk_screen_get_default ();
}
context = gdk_pango_context_get_for_screen (screen);
gdk_pango_context_set_colormap (context, gtk_widget_get_colormap (widget));
pango_context_set_base_dir (context,
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR ?
PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL);
pango_context_set_font_description (context, widget->style->font_desc);
pango_context_set_language (context, gtk_get_default_language ());
return context;
}
/**
* gtk_widget_create_pango_layout:
* @widget: a #GtkWidget
* @text: text to set on the layout (can be %NULL)
*
* Creates a new #PangoLayout with the appropriate colormap,
* font description, and base direction for drawing text for
* this widget.
*
* If you keep a #PangoLayout created in this way around, in order
* notify the layout of changes to the base direction or font of this
* widget, you must call pango_layout_context_changed() in response to
* the ::style_set and ::direction_set signals for the widget.
*
* Return value: the new #PangoLayout
**/
PangoLayout *
gtk_widget_create_pango_layout (GtkWidget *widget,
const gchar *text)
{
PangoLayout *layout;
PangoContext *context;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
context = gtk_widget_get_pango_context (widget);
layout = pango_layout_new (context);
if (text)
pango_layout_set_text (layout, text, -1);
return layout;
}
/**
* gtk_widget_render_icon:
* @widget: a #GtkWidget
* @stock_id: a stock ID
* @size: a stock size
* @detail: render detail to pass to theme engine
*
* A convenience function that uses the theme engine and RC file
* settings for @widget to look up @stock_id and render it to
* a pixbuf. @stock_id should be a stock icon ID such as
* #GTK_STOCK_OPEN or #GTK_STOCK_OK. @size should be a size
* such as #GTK_ICON_SIZE_MENU. @detail should be a string that
* identifies the widget or code doing the rendering, so that
* theme engines can special-case rendering for that widget or code.
*
* The pixels in the returned #GdkPixbuf are shared with the rest of
* the application and should not be modified. The pixbuf should be freed
* after use with g_object_unref().
*
* Return value: a new pixbuf, or %NULL if the stock ID wasn't known
**/
GdkPixbuf*
gtk_widget_render_icon (GtkWidget *widget,
const gchar *stock_id,
GtkIconSize size,
const gchar *detail)
{
GtkIconSet *icon_set;
GdkPixbuf *retval;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (stock_id != NULL, NULL);
g_return_val_if_fail (size > GTK_ICON_SIZE_INVALID, NULL);
gtk_widget_ensure_style (widget);
icon_set = gtk_style_lookup_icon_set (widget->style, stock_id);
if (icon_set == NULL)
return NULL;
retval = gtk_icon_set_render_icon (icon_set,
widget->style,
gtk_widget_get_direction (widget),
GTK_WIDGET_STATE (widget),
size,
widget,
detail);
return retval;
}
/**
* gtk_widget_set_parent_window:
* @widget: a #GtkWidget.
* @parent_window: the new parent window.
*
* Sets a non default parent window for @widget.
**/
void
gtk_widget_set_parent_window (GtkWidget *widget,
GdkWindow *parent_window)
{
GdkWindow *old_parent_window;
g_return_if_fail (GTK_IS_WIDGET (widget));
old_parent_window = g_object_get_qdata (G_OBJECT (widget),
quark_parent_window);
if (parent_window != old_parent_window)
{
g_object_set_qdata (G_OBJECT (widget), quark_parent_window,
parent_window);
if (old_parent_window)
g_object_unref (old_parent_window);
if (parent_window)
g_object_ref (parent_window);
}
}
/**
* gtk_widget_set_child_visible:
* @widget: a #GtkWidget
* @is_visible: if %TRUE, @widget should be mapped along with its parent.
*
* Sets whether @widget should be mapped along with its when its parent
* is mapped and @widget has been shown with gtk_widget_show().
*
* The child visibility can be set for widget before it is added to
* a container with gtk_widget_set_parent(), to avoid mapping
* children unnecessary before immediately unmapping them. However
* it will be reset to its default state of %TRUE when the widget
* is removed from a container.
*
* Note that changing the child visibility of a widget does not
* queue a resize on the widget. Most of the time, the size of
* a widget is computed from all visible children, whether or
* not they are mapped. If this is not the case, the container
* can queue a resize itself.
*
* This function is only useful for container implementations and
* never should be called by an application.
**/
void
gtk_widget_set_child_visible (GtkWidget *widget,
gboolean is_visible)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (!GTK_WIDGET_TOPLEVEL (widget));
if (is_visible)
GTK_PRIVATE_SET_FLAG (widget, GTK_CHILD_VISIBLE);
else
{
GtkWidget *toplevel;
GTK_PRIVATE_UNSET_FLAG (widget, GTK_CHILD_VISIBLE);
toplevel = gtk_widget_get_toplevel (widget);
if (toplevel != widget && GTK_WIDGET_TOPLEVEL (toplevel))
_gtk_window_unset_focus_and_default (GTK_WINDOW (toplevel), widget);
}
if (widget->parent && GTK_WIDGET_REALIZED (widget->parent))
{
if (GTK_WIDGET_MAPPED (widget->parent) &&
GTK_WIDGET_CHILD_VISIBLE (widget) &&
GTK_WIDGET_VISIBLE (widget))
gtk_widget_map (widget);
else
gtk_widget_unmap (widget);
}
}
/**
* gtk_widget_get_child_visible:
* @widget: a #GtkWidget
*
* Gets the value set with gtk_widget_set_child_visible().
* If you feel a need to use this function, your code probably
* needs reorganization.
*
* This function is only useful for container implementations and
* never should be called by an application.
*
* Return value: %TRUE if the widget is mapped with the parent.
**/
gboolean
gtk_widget_get_child_visible (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return GTK_WIDGET_CHILD_VISIBLE (widget);
}
static GdkScreen *
gtk_widget_get_screen_unchecked (GtkWidget *widget)
{
GtkWidget *toplevel;
toplevel = gtk_widget_get_toplevel (widget);
if (GTK_WIDGET_TOPLEVEL (toplevel))
{
if (GTK_IS_WINDOW (toplevel))
return GTK_WINDOW (toplevel)->screen;
else if (GTK_IS_INVISIBLE (toplevel))
return GTK_INVISIBLE (widget)->screen;
}
return NULL;
}
/**
* gtk_widget_get_screen:
* @widget: a #GtkWidget
*
* Get the #GdkScreen from the toplevel window associated with
* this widget. This function can only be called after the widget
* has been added to a widget hierarchy with a #GtkWindow
* at the top.
*
* In general, you should only create screen specific
* resources when a widget has been realized, and you should
* free those resources when the widget is unrealized.
*
* Return value: the #GdkScreen for the toplevel for this widget.
*
* Since: 2.2
**/
GdkScreen*
gtk_widget_get_screen (GtkWidget *widget)
{
GdkScreen *screen;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
screen = gtk_widget_get_screen_unchecked (widget);
if (screen)
return screen;
else
{
#if 0
g_warning (G_STRLOC ": Can't get associated screen"
" for a widget unless it is inside a toplevel GtkWindow\n"
" widget type is %s associated top level type is %s",
g_type_name (G_OBJECT_TYPE(G_OBJECT (widget))),
g_type_name (G_OBJECT_TYPE(G_OBJECT (toplevel))));
#endif
return gdk_screen_get_default ();
}
}
/**
* gtk_widget_has_screen:
* @widget: a #GtkWidget
*
* Checks whether there is a #GdkScreen is associated with
* this widget. All toplevel widgets have an associated
* screen, and all widgets added into a heirarchy with a toplevel
* window at the top.
*
* Return value: %TRUE if there is a #GdkScreen associcated
* with the widget.
*
* Since: 2.2
**/
gboolean
gtk_widget_has_screen (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return (gtk_widget_get_screen_unchecked (widget) != NULL);
}
/**
* gtk_widget_get_display:
* @widget: a #GtkWidget
*
* Get the #GdkDisplay for the toplevel window associated with
* this widget. This function can only be called after the widget
* has been added to a widget hierarchy with a #GtkWindow at the top.
*
* In general, you should only create display specific
* resources when a widget has been realized, and you should
* free those resources when the widget is unrealized.
*
* Return value: the #GdkDisplay for the toplevel for this widget.
*
* Since: 2.2
**/
GdkDisplay*
gtk_widget_get_display (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gdk_screen_get_display (gtk_widget_get_screen (widget));
}
/**
* gtk_widget_get_root_window:
* @widget: a #GtkWidget
*
* Get the root window where this widget is located. This function can
* only be called after the widget has been added to a widget
* heirarchy with #GtkWindow at the top.
*
* The root window is useful for such purposes as creating a popup
* #GdkWindow associated with the window. In general, you should only
* create display specific resources when a widget has been realized,
* and you should free those resources when the widget is unrealized.
*
* Return value: the #GdkWindow root window for the toplevel for this widget.
*
* Since: 2.2
**/
GdkWindow*
gtk_widget_get_root_window (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gdk_screen_get_root_window (gtk_widget_get_screen (widget));
}
/**
* gtk_widget_get_parent_window:
* @widget: a #GtkWidget.
* @returns: the parent window of @widget.
*
* Gets @widget's parent window.
**/
GdkWindow *
gtk_widget_get_parent_window (GtkWidget *widget)
{
GdkWindow *parent_window;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (widget->parent != NULL, NULL);
parent_window = g_object_get_qdata (G_OBJECT (widget), quark_parent_window);
return (parent_window != NULL) ? parent_window : widget->parent->window;
}
/**
* gtk_widget_child_focus:
* @widget: a #GtkWidget
* @direction: direction of focus movement
*
* This function is used by custom widget implementations; if you're
* writing an app, you'd use gtk_widget_grab_focus() to move the focus
* to a particular widget, and gtk_container_set_focus_chain() to
* change the focus tab order. So you may want to investigate those
* functions instead.
*
* gtk_widget_child_focus() is called by containers as the user moves
* around the window using keyboard shortcuts. @direction indicates
* what kind of motion is taking place (up, down, left, right, tab
* forward, tab backward). gtk_widget_child_focus() invokes the
* "focus" signal on #GtkWidget; widgets override the default handler
* for this signal in order to implement appropriate focus behavior.
*
* The "focus" default handler for a widget should return %TRUE if
* moving in @direction left the focus on a focusable location inside
* that widget, and %FALSE if moving in @direction moved the focus
* outside the widget. If returning %TRUE, widgets normally
* call gtk_widget_grab_focus() to place the focus accordingly;
* if returning %FALSE, they don't modify the current focus location.
*
* This function replaces gtk_container_focus() from GTK+ 1.2. It was
* necessary to check that the child was visible, sensitive, and
* focusable before calling
* gtk_container_focus(). gtk_widget_child_focus() returns %FALSE if
* the widget is not currently in a focusable state, so there's no
* need for those checks.
*
* Return value: %TRUE if focus ended up inside @widget
**/
gboolean
gtk_widget_child_focus (GtkWidget *widget,
GtkDirectionType direction)
{
gboolean return_val;
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
if (!GTK_WIDGET_VISIBLE (widget) ||
!GTK_WIDGET_IS_SENSITIVE (widget))
return FALSE;
/* child widgets must set CAN_FOCUS, containers
* don't have to though.
*/
if (!GTK_IS_CONTAINER (widget) &&
!GTK_WIDGET_CAN_FOCUS (widget))
return FALSE;
g_signal_emit (widget,
widget_signals[FOCUS],
0,
direction, &return_val);
return return_val;
}
/**
* gtk_widget_set_uposition:
* @widget: a #GtkWidget
* @x: x position; -1 to unset x; -2 to leave x unchanged
* @y: y position; -1 to unset y; -2 to leave y unchanged
*
*
* Sets the position of a widget. The funny "u" in the name comes from
* the "user position" hint specified by the X Window System, and
* exists for legacy reasons. This function doesn't work if a widget
* is inside a container; it's only really useful on #GtkWindow.
*
* Don't use this function to center dialogs over the main application
* window; most window managers will do the centering on your behalf
* if you call gtk_window_set_transient_for(), and it's really not
* possible to get the centering to work correctly in all cases from
* application code. But if you insist, use gtk_window_set_position()
* to set #GTK_WIN_POS_CENTER_ON_PARENT, don't do the centering
* manually.
*
* Note that although @x and @y can be individually unset, the position
* is not honoured unless both @x and @y are set.
**/
void
gtk_widget_set_uposition (GtkWidget *widget,
gint x,
gint y)
{
/* FIXME this function is the only place that aux_info->x and
* aux_info->y are even used I believe, and this function is
* deprecated. Should be cleaned up.
*
* (Actually, size_allocate uses them) -Yosh
*/
GtkWidgetAuxInfo *aux_info;
g_return_if_fail (GTK_IS_WIDGET (widget));
aux_info =_gtk_widget_get_aux_info (widget, TRUE);
if (x > -2)
{
if (x == -1)
aux_info->x_set = FALSE;
else
{
aux_info->x_set = TRUE;
aux_info->x = x;
}
}
if (y > -2)
{
if (y == -1)
aux_info->y_set = FALSE;
else
{
aux_info->y_set = TRUE;
aux_info->y = y;
}
}
if (GTK_IS_WINDOW (widget) && aux_info->x_set && aux_info->y_set)
_gtk_window_reposition (GTK_WINDOW (widget), aux_info->x, aux_info->y);
if (GTK_WIDGET_VISIBLE (widget) && widget->parent)
gtk_widget_size_allocate (widget, &widget->allocation);
}
static void
gtk_widget_set_usize_internal (GtkWidget *widget,
gint width,
gint height)
{
GtkWidgetAuxInfo *aux_info;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_freeze_notify (G_OBJECT (widget));
aux_info =_gtk_widget_get_aux_info (widget, TRUE);
if (width > -2)
{
g_object_notify (G_OBJECT (widget), "width_request");
aux_info->width = width;
}
if (height > -2)
{
g_object_notify (G_OBJECT (widget), "height_request");
aux_info->height = height;
}
if (GTK_WIDGET_VISIBLE (widget))
gtk_widget_queue_resize (widget);
g_object_thaw_notify (G_OBJECT (widget));
}
/**
* gtk_widget_set_usize:
* @widget: a #GtkWidget
* @width: minimum width, or -1 to unset
* @height: minimum height, or -1 to unset
*
* Sets the minimum size of a widget; that is, the widget's size
* request will be @width by @height. You can use this function to
* force a widget to be either larger or smaller than it is. The
* strange "usize" name dates from the early days of GTK+, and derives
* from X Window System terminology. In many cases,
* gtk_window_set_default_size() is a better choice for toplevel
* windows than this function; setting the default size will still
* allow users to shrink the window. Setting the usize will force them
* to leave the window at least as large as the usize. When dealing
* with window sizes, gtk_window_set_geometry_hints() can be a useful
* function as well.
*
* Note the inherent danger of setting any fixed size - themes,
* translations into other languages, different fonts, and user action
* can all change the appropriate size for a given widget. So, it's
* basically impossible to hardcode a size that will always be
* correct.
*
* @Deprecated: Use gtk_widget_set_size_request() instead.
**/
void
gtk_widget_set_usize (GtkWidget *widget,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_widget_set_usize_internal (widget, width, height);
}
/**
* gtk_widget_set_size_request:
* @widget: a #GtkWidget
* @width: width @widget should request, or -1 to unset
* @height: height @widget should request, or -1 to unset
*
* Sets the minimum size of a widget; that is, the widget's size
* request will be @width by @height. You can use this function to
* force a widget to be either larger or smaller than it normally
* would be.
*
* In most cases, gtk_window_set_default_size() is a better choice for
* toplevel windows than this function; setting the default size will
* still allow users to shrink the window. Setting the size request
* will force them to leave the window at least as large as the size
* request. When dealing with window sizes,
* gtk_window_set_geometry_hints() can be a useful function as well.
*
* Note the inherent danger of setting any fixed size - themes,
* translations into other languages, different fonts, and user action
* can all change the appropriate size for a given widget. So, it's
* basically impossible to hardcode a size that will always be
* correct.
*
* The size request of a widget is the smallest size a widget can
* accept while still functioning well and drawing itself correctly.
* However in some strange cases a widget may be allocated less than
* its requested size, and in many cases a widget may be allocated more
* space than it requested.
*
* If the size request in a given direction is -1 (unset), then
* the "natural" size request of the widget will be used instead.
*
* Widgets can't actually be allocated a size less than 1 by 1, but
* you can pass 0,0 to this function to mean "as small as possible."
**/
void
gtk_widget_set_size_request (GtkWidget *widget,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (width >= -1);
g_return_if_fail (height >= -1);
if (width == 0)
width = 1;
if (height == 0)
height = 1;
gtk_widget_set_usize_internal (widget, width, height);
}
/**
* gtk_widget_get_size_request:
* @widget: a #GtkWidget
* @width: return location for width, or %NULL
* @height: return location for height, or %NULL
*
* Gets the size request that was explicitly set for the widget using
* gtk_widget_set_size_request(). A value of -1 stored in @width or
* @height indicates that that dimension has not been set explicitly
* and the natural requisition of the widget will be used intead. See
* gtk_widget_set_size_request(). To get the size a widget will
* actually use, call gtk_widget_size_request() instead of
* this function.
*
**/
void
gtk_widget_get_size_request (GtkWidget *widget,
gint *width,
gint *height)
{
GtkWidgetAuxInfo *aux_info;
g_return_if_fail (GTK_IS_WIDGET (widget));
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (width)
*width = aux_info ? aux_info->width : -1;
if (height)
*height = aux_info ? aux_info->height : -1;
}
/**
* gtk_widget_set_events:
* @widget: a #GtkWidget
* @events: event mask
*
* Sets the event mask (see #GdkEventMask) for a widget. The event
* mask determines which events a widget will receive. Keep in mind
* that different widgets have different default event masks, and by
* changing the event mask you may disrupt a widget's functionality,
* so be careful. This function must be called while a widget is
* unrealized. Consider gtk_widget_add_events() for widgets that are
* already realized, or if you want to preserve the existing event
* mask. This function can't be used with #GTK_NO_WINDOW widgets;
* to get events on those widgets, place them inside a #GtkEventBox
* and receive events on the event box.
*
**/
void
gtk_widget_set_events (GtkWidget *widget,
gint events)
{
gint *eventp;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (!GTK_WIDGET_REALIZED (widget));
eventp = g_object_get_qdata (G_OBJECT (widget), quark_event_mask);
if (events)
{
if (!eventp)
eventp = g_new (gint, 1);
*eventp = events;
g_object_set_qdata (G_OBJECT (widget), quark_event_mask, eventp);
}
else if (eventp)
{
g_free (eventp);
g_object_set_qdata (G_OBJECT (widget), quark_event_mask, NULL);
}
g_object_notify (G_OBJECT (widget), "events");
}
/**
* gtk_widget_add_events:
* @widget: a #GtkWidget
* @events: an event mask, see #GdkEventMask
*
* Adds the events in the bitfield @events to the event mask for
* @widget. See gtk_widget_set_events() for details.
*
**/
void
gtk_widget_add_events (GtkWidget *widget,
gint events)
{
gint *eventp;
g_return_if_fail (GTK_IS_WIDGET (widget));
eventp = g_object_get_qdata (G_OBJECT (widget), quark_event_mask);
if (events)
{
if (!eventp)
{
eventp = g_new (gint, 1);
*eventp = 0;
}
*eventp |= events;
g_object_set_qdata (G_OBJECT (widget), quark_event_mask, eventp);
}
else if (eventp)
{
g_free (eventp);
g_object_set_qdata (G_OBJECT (widget), quark_event_mask, NULL);
}
if (GTK_WIDGET_REALIZED (widget))
{
if (GTK_WIDGET_NO_WINDOW (widget))
{
GList *children = gdk_window_get_children (widget->window);
GList *tmp_list = children;
while (tmp_list)
{
GdkWindow *window = tmp_list->data;
gpointer user_data;
gdk_window_get_user_data (window, &user_data);
if (user_data == widget)
gdk_window_set_events (window, gdk_window_get_events (window) | events);
tmp_list = tmp_list->next;
}
g_list_free (children);
}
else
{
gdk_window_set_events (widget->window, gdk_window_get_events (widget->window) | events);
}
}
g_object_notify (G_OBJECT (widget), "events");
}
/**
* gtk_widget_set_extension_events:
* @widget: a #GtkWidget
* @mode: bitfield of extension events to receive
*
* Sets the extension events mask to @mode. See #GdkExtensionMode
* and gdk_input_set_extension_events().
*
**/
void
gtk_widget_set_extension_events (GtkWidget *widget,
GdkExtensionMode mode)
{
GdkExtensionMode *modep;
g_return_if_fail (GTK_IS_WIDGET (widget));
modep = g_object_get_qdata (G_OBJECT (widget), quark_extension_event_mode);
if (!modep)
modep = g_new (GdkExtensionMode, 1);
*modep = mode;
g_object_set_qdata (G_OBJECT (widget), quark_extension_event_mode, modep);
g_object_notify (G_OBJECT (widget), "extension_events");
}
/**
* gtk_widget_get_toplevel:
* @widget: a #GtkWidget
*
* This function returns the topmost widget in the container hierarchy
* @widget is a part of. If @widget has no parent widgets, it will be
* returned as the topmost widget. No reference will be added to the
* returned widget; it should not be unreferenced.
*
* Note the difference in behavior vs. gtk_widget_get_ancestor();
* <literal>gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW)</literal>
* would return
* %NULL if @widget wasn't inside a toplevel window, and if the
* window was inside a #GtkWindow-derived widget which was in turn
* inside the toplevel #GtkWindow. While the second case may
* seem unlikely, it actually happens when a #GtkPlug is embedded
* inside a #GtkSocket within the same application.
*
* To reliably find the toplevel #GtkWindow, use
* gtk_widget_get_toplevel() and check if the %TOPLEVEL flags
* is set on the result.
* <informalexample><programlisting>
* GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
* if (GTK_WIDGET_TOPLEVEL (toplevel))
* {
* [ Perform action on toplevel. ]
* }
* </programlisting></informalexample>
*
* Return value: the topmost ancestor of @widget, or @widget itself if there's no ancestor.
**/
GtkWidget*
gtk_widget_get_toplevel (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
while (widget->parent)
widget = widget->parent;
return widget;
}
/**
* gtk_widget_get_ancestor:
* @widget: a #GtkWidget
* @widget_type: ancestor type
*
* Gets the first ancestor of @widget with type @widget_type. For example,
* <literal>gtk_widget_get_ancestor (widget, GTK_TYPE_BOX)</literal> gets the
* first #GtkBox that's
* an ancestor of @widget. No reference will be added to the returned widget;
* it should not be unreferenced. See note about checking for a toplevel
* #GtkWindow in the docs for gtk_widget_get_toplevel().
*
* Note that unlike gtk_widget_is_ancestor(), gtk_widget_get_ancestor()
* considers @widget to be an ancestor of itself.
*
* Return value: the ancestor widget, or %NULL if not found
**/
GtkWidget*
gtk_widget_get_ancestor (GtkWidget *widget,
GType widget_type)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
while (widget && !g_type_is_a (GTK_WIDGET_TYPE (widget), widget_type))
widget = widget->parent;
if (!(widget && g_type_is_a (GTK_WIDGET_TYPE (widget), widget_type)))
return NULL;
return widget;
}
/**
* gtk_widget_get_colormap:
* @widget: a #GtkWidget
*
* Gets the colormap that will be used to render @widget. No reference will
* be added to the returned colormap; it should not be unreferenced.
*
* Return value: the colormap used by @widget
**/
GdkColormap*
gtk_widget_get_colormap (GtkWidget *widget)
{
GdkColormap *colormap;
GtkWidget *tmp_widget;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (widget->window)
{
colormap = gdk_drawable_get_colormap (widget->window);
/* If window was destroyed previously, we'll get NULL here */
if (colormap)
return colormap;
}
tmp_widget = widget;
while (tmp_widget)
{
colormap = g_object_get_qdata (G_OBJECT (tmp_widget), quark_colormap);
if (colormap)
return colormap;
tmp_widget= tmp_widget->parent;
}
return gdk_screen_get_default_colormap (gtk_widget_get_screen (widget));
}
/**
* gtk_widget_get_visual:
* @widget: a #GtkWidget
*
* Gets the visual that will be used to render @widget.
*
* Return value: the visual for @widget
**/
GdkVisual*
gtk_widget_get_visual (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gdk_colormap_get_visual (gtk_widget_get_colormap (widget));
}
/**
* gtk_widget_get_settings:
* @widget: a #GtkWidget
*
* Gets the settings object holding the settings (global property
* settings, RC file information, etc) used for this widget.
*
* Note that this function can only be called when the #GtkWidget
* is attached to a toplevel, since the settings object is specific
* to a particular #GdkScreen.
*
* Return value: the relevant #GtkSettings object
**/
GtkSettings*
gtk_widget_get_settings (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return gtk_settings_get_for_screen (gtk_widget_get_screen (widget));
}
/**
* gtk_widget_set_colormap:
* @widget: a #GtkWidget
* @colormap: a colormap
*
* Sets the colormap for the widget to the given value. Widget must not
* have been previously realized. This probably should only be used
* from an <function>init()</function> function (i.e. from the constructor
* for the widget).
*
**/
void
gtk_widget_set_colormap (GtkWidget *widget,
GdkColormap *colormap)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (!GTK_WIDGET_REALIZED (widget));
g_return_if_fail (GDK_IS_COLORMAP (colormap));
g_object_ref (colormap);
g_object_set_qdata_full (G_OBJECT (widget),
quark_colormap,
colormap,
g_object_unref);
}
/**
* gtk_widget_get_events:
* @widget: a #GtkWidget
*
* Returns the event mask for the widget (a bitfield containing flags
* from the #GdkEventMask enumeration). These are the events that the widget
* will receive.
*
* Return value: event mask for @widget
**/
gint
gtk_widget_get_events (GtkWidget *widget)
{
gint *events;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
events = g_object_get_qdata (G_OBJECT (widget), quark_event_mask);
if (events)
return *events;
return 0;
}
/**
* gtk_widget_get_extension_events:
* @widget: a #GtkWidget
*
* Retrieves the extension events the widget will receive; see
* gdk_input_set_extension_events().
*
* Return value: extension events for @widget
**/
GdkExtensionMode
gtk_widget_get_extension_events (GtkWidget *widget)
{
GdkExtensionMode *mode;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
mode = g_object_get_qdata (G_OBJECT (widget), quark_extension_event_mode);
if (mode)
return *mode;
return 0;
}
/**
* gtk_widget_get_pointer:
* @widget: a #GtkWidget
* @x: return location for the X coordinate, or %NULL
* @y: return location for the Y coordinate, or %NULL
*
* Obtains the location of the mouse pointer in widget coordinates.
* Widget coordinates are a bit odd; for historical reasons, they are
* defined as @widget->window coordinates for widgets that are not
* #GTK_NO_WINDOW widgets, and are relative to @widget->allocation.x,
* @widget->allocation.y for widgets that are #GTK_NO_WINDOW widgets.
*
**/
void
gtk_widget_get_pointer (GtkWidget *widget,
gint *x,
gint *y)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
if (x)
*x = -1;
if (y)
*y = -1;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_get_pointer (widget->window, x, y, NULL);
if (GTK_WIDGET_NO_WINDOW (widget))
{
if (x)
*x -= widget->allocation.x;
if (y)
*y -= widget->allocation.y;
}
}
}
/**
* gtk_widget_is_ancestor:
* @widget: a #GtkWidget
* @ancestor: another #GtkWidget
*
* Determines whether @widget is somewhere inside @ancestor, possibly with
* intermediate containers.
*
* Return value: %TRUE if @ancestor contains @widget as a child, grandchild, great grandchild, etc.
**/
gboolean
gtk_widget_is_ancestor (GtkWidget *widget,
GtkWidget *ancestor)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (ancestor != NULL, FALSE);
while (widget)
{
if (widget->parent == ancestor)
return TRUE;
widget = widget->parent;
}
return FALSE;
}
static GQuark quark_composite_name = 0;
/**
* gtk_widget_set_composite_name:
* @widget: a #GtkWidget.
* @name: the name to set.
*
* Sets a widgets composite name. The widget must be
* a composite child of its parent; see gtk_widget_push_composite_child().
**/
void
gtk_widget_set_composite_name (GtkWidget *widget,
const gchar *name)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_COMPOSITE_CHILD (widget));
g_return_if_fail (name != NULL);
if (!quark_composite_name)
quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
g_object_set_qdata_full (G_OBJECT (widget),
quark_composite_name,
g_strdup (name),
g_free);
}
/**
* gtk_widget_get_composite_name:
* @widget: a #GtkWidget.
* @returns: the composite name of @widget, or %NULL if @widget is not
* a composite child. The string should not be freed when it is no
* longer needed.
*
* Obtains the composite name of a widget.
**/
gchar*
gtk_widget_get_composite_name (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
if (GTK_WIDGET_COMPOSITE_CHILD (widget) && widget->parent)
return _gtk_container_child_composite_name (GTK_CONTAINER (widget->parent),
widget);
else
return NULL;
}
/**
* gtk_widget_push_composite_child:
*
* Makes all newly-created widgets as composite children until
* the corresponding gtk_widget_pop_composite_child() call.
*
* A composite child is a child that's an implementation detail of the
* container it's inside and should not be visible to people using the
* container. Composite children aren't treated differently by GTK (but
* see gtk_container_foreach() vs. gtk_container_forall()), but e.g. GUI
* builders might want to treat them in a different way.
*
* Here is a simple example:
* <informalexample><programlisting>
* gtk_widget_push_composite_child (<!-- -->);
* scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
* gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar");
* gtk_widget_pop_composite_child (<!-- -->);
* gtk_widget_set_parent (scrolled_window->hscrollbar,
* GTK_WIDGET (scrolled_window));
* g_object_ref (scrolled_window->hscrollbar);
* </programlisting></informalexample>
**/
void
gtk_widget_push_composite_child (void)
{
composite_child_stack++;
}
/**
* gtk_widget_pop_composite_child:
*
* Cancels the effect of a previous call to gtk_widget_push_composite_child().
**/
void
gtk_widget_pop_composite_child (void)
{
if (composite_child_stack)
composite_child_stack--;
}
/**
* gtk_widget_push_colormap:
* @cmap: a #GdkColormap
*
* Pushes @cmap onto a global stack of colormaps; the topmost
* colormap on the stack will be used to create all widgets.
* Remove @cmap with gtk_widget_pop_colormap(). There's little
* reason to use this function.
*
**/
void
gtk_widget_push_colormap (GdkColormap *cmap)
{
g_return_if_fail (!cmap || GDK_IS_COLORMAP (cmap));
colormap_stack = g_slist_prepend (colormap_stack, cmap);
}
/**
* gtk_widget_pop_colormap:
*
* Removes a colormap pushed with gtk_widget_push_colormap().
*
**/
void
gtk_widget_pop_colormap (void)
{
if (colormap_stack)
colormap_stack = g_slist_delete_link (colormap_stack, colormap_stack);
}
/**
* gtk_widget_set_default_colormap:
* @colormap: a #GdkColormap
*
* Sets the default colormap to use when creating widgets.
* gtk_widget_push_colormap() is a better function to use if
* you only want to affect a few widgets, rather than all widgets.
**/
void
gtk_widget_set_default_colormap (GdkColormap *colormap)
{
g_return_if_fail (GDK_IS_COLORMAP (colormap));
gdk_screen_set_default_colormap (gdk_colormap_get_screen (colormap),
colormap);
}
/**
* gtk_widget_get_default_colormap:
*
* Obtains the default colormap used to create widgets.
*
* Return value: default widget colormap
**/
GdkColormap*
gtk_widget_get_default_colormap (void)
{
return gdk_screen_get_default_colormap (gdk_screen_get_default ());
}
/**
* gtk_widget_get_default_visual:
*
* Obtains the visual of the default colormap. Not really useful;
* used to be useful before gdk_colormap_get_visual() existed.
*
* Return value: visual of the default colormap
**/
GdkVisual*
gtk_widget_get_default_visual (void)
{
return gdk_colormap_get_visual (gtk_widget_get_default_colormap ());
}
static void
gtk_widget_emit_direction_changed (GtkWidget *widget,
GtkTextDirection old_dir)
{
PangoContext *context = gtk_widget_peek_pango_context (widget);
if (context)
pango_context_set_base_dir (context,
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR ?
PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL);
g_signal_emit (widget, widget_signals[DIRECTION_CHANGED], 0, old_dir);
}
/**
* gtk_widget_set_direction:
* @widget: a #GtkWidget
* @dir: the new direction
*
* Sets the reading direction on a particular widget. This direction
* controls the primary direction for widgets containing text,
* and also the direction in which the children of a container are
* packed. The ability to set the direction is present in order
* so that correct localization into languages with right-to-left
* reading directions can be done. Generally, applications will
* let the default reading direction present, except for containers
* where the containers are arranged in an order that is explicitely
* visual rather than logical (such as buttons for text justification).
*
* If the direction is set to %GTK_TEXT_DIR_NONE, then the value
* set by gtk_widget_set_default_direction() will be used.
**/
void
gtk_widget_set_direction (GtkWidget *widget,
GtkTextDirection dir)
{
GtkTextDirection old_dir;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (dir >= GTK_TEXT_DIR_NONE && dir <= GTK_TEXT_DIR_RTL);
old_dir = gtk_widget_get_direction (widget);
if (dir == GTK_TEXT_DIR_NONE)
GTK_PRIVATE_UNSET_FLAG (widget, GTK_DIRECTION_SET);
else
{
GTK_PRIVATE_SET_FLAG (widget, GTK_DIRECTION_SET);
if (dir == GTK_TEXT_DIR_LTR)
GTK_PRIVATE_SET_FLAG (widget, GTK_DIRECTION_LTR);
else
GTK_PRIVATE_UNSET_FLAG (widget, GTK_DIRECTION_LTR);
}
if (old_dir != gtk_widget_get_direction (widget))
gtk_widget_emit_direction_changed (widget, old_dir);
}
/**
* gtk_widget_get_direction:
* @widget: a #GtkWidget
*
* Gets the reading direction for a particular widget. See
* gtk_widget_set_direction().
*
* Return value: the reading direction for the widget.
**/
GtkTextDirection
gtk_widget_get_direction (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), GTK_TEXT_DIR_LTR);
if (GTK_WIDGET_DIRECTION_SET (widget))
return GTK_WIDGET_DIRECTION_LTR (widget) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
else
return gtk_default_direction;
}
static void
gtk_widget_set_default_direction_recurse (GtkWidget *widget, gpointer data)
{
GtkTextDirection old_dir = GPOINTER_TO_UINT (data);
g_object_ref (widget);
if (!GTK_WIDGET_DIRECTION_SET (widget))
gtk_widget_emit_direction_changed (widget, old_dir);
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
gtk_widget_set_default_direction_recurse,
data);
g_object_unref (widget);
}
/**
* gtk_widget_set_default_direction:
* @dir: the new default direction. This cannot be
* %GTK_TEXT_DIR_NONE.
*
* Sets the default reading direction for widgets where the
* direction has not been explicitly set by gtk_widget_set_direction().
**/
void
gtk_widget_set_default_direction (GtkTextDirection dir)
{
g_return_if_fail (dir == GTK_TEXT_DIR_RTL || dir == GTK_TEXT_DIR_LTR);
if (dir != gtk_default_direction)
{
GList *toplevels, *tmp_list;
GtkTextDirection old_dir = gtk_default_direction;
gtk_default_direction = dir;
tmp_list = toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc)g_object_ref, NULL);
while (tmp_list)
{
gtk_widget_set_default_direction_recurse (tmp_list->data,
GUINT_TO_POINTER (old_dir));
g_object_unref (tmp_list->data);
tmp_list = tmp_list->next;
}
g_list_free (toplevels);
}
}
/**
* gtk_widget_get_default_direction:
*
* Obtains the current default reading direction. See
* gtk_widget_set_default_direction().
*
* Return value: the current default direction.
**/
GtkTextDirection
gtk_widget_get_default_direction (void)
{
return gtk_default_direction;
}
static void
gtk_widget_dispose (GObject *object)
{
GtkWidget *widget = GTK_WIDGET (object);
if (widget->parent)
gtk_container_remove (GTK_CONTAINER (widget->parent), widget);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_VISIBLE);
if (GTK_WIDGET_REALIZED (widget))
gtk_widget_unrealize (widget);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gtk_widget_real_destroy (GtkObject *object)
{
/* gtk_object_destroy() will already hold a refcount on object */
GtkWidget *widget = GTK_WIDGET (object);
/* wipe accelerator closures (keep order) */
g_object_set_qdata (G_OBJECT (widget), quark_accel_path, NULL);
g_object_set_qdata (G_OBJECT (widget), quark_accel_closures, NULL);
gtk_grab_remove (widget);
g_object_unref (widget->style);
widget->style = gtk_widget_get_default_style ();
g_object_ref (widget->style);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gtk_widget_finalize (GObject *object)
{
GtkWidget *widget = GTK_WIDGET (object);
GtkWidgetAuxInfo *aux_info;
gint *events;
GdkExtensionMode *mode;
GtkAccessible *accessible;
gtk_grab_remove (widget);
g_object_unref (widget->style);
widget->style = NULL;
if (widget->name)
g_free (widget->name);
aux_info =_gtk_widget_get_aux_info (widget, FALSE);
if (aux_info)
gtk_widget_aux_info_destroy (aux_info);
events = g_object_get_qdata (G_OBJECT (widget), quark_event_mask);
if (events)
g_free (events);
mode = g_object_get_qdata (G_OBJECT (widget), quark_extension_event_mode);
if (mode)
g_free (mode);
accessible = g_object_get_qdata (G_OBJECT (widget), quark_accessible_object);
if (accessible)
g_object_unref (accessible);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/*****************************************
* gtk_widget_real_map:
*
* arguments:
*
* results:
*****************************************/
static void
gtk_widget_real_map (GtkWidget *widget)
{
g_return_if_fail (GTK_WIDGET_REALIZED (widget) == TRUE);
if (!GTK_WIDGET_MAPPED (widget))
{
GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
if (!GTK_WIDGET_NO_WINDOW (widget))
gdk_window_show (widget->window);
}
}
/*****************************************
* gtk_widget_real_unmap:
*
* arguments:
*
* results:
*****************************************/
static void
gtk_widget_real_unmap (GtkWidget *widget)
{
if (GTK_WIDGET_MAPPED (widget))
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
if (!GTK_WIDGET_NO_WINDOW (widget))
gdk_window_hide (widget->window);
}
}
/*****************************************
* gtk_widget_real_realize:
*
* arguments:
*
* results:
*****************************************/
static void
gtk_widget_real_realize (GtkWidget *widget)
{
g_return_if_fail (GTK_WIDGET_NO_WINDOW (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
if (widget->parent)
{
widget->window = gtk_widget_get_parent_window (widget);
g_object_ref (widget->window);
}
widget->style = gtk_style_attach (widget->style, widget->window);
}
/*****************************************
* gtk_widget_real_unrealize:
*
* arguments:
*
* results:
*****************************************/
static void
gtk_widget_real_unrealize (GtkWidget *widget)
{
if (GTK_WIDGET_MAPPED (widget))
gtk_widget_real_unmap (widget);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
/* printf ("unrealizing %s\n", g_type_name (G_TYPE_FROM_INSTANCE (widget)));
*/
/* We must do unrealize child widget BEFORE container widget.
* gdk_window_destroy() destroys specified xwindow and its sub-xwindows.
* So, unrealizing container widget bofore its children causes the problem
* (for example, gdk_ic_destroy () with destroyed window causes crash. )
*/
if (GTK_IS_CONTAINER (widget))
gtk_container_forall (GTK_CONTAINER (widget),
(GtkCallback) gtk_widget_unrealize,
NULL);
gtk_style_detach (widget->style);
if (!GTK_WIDGET_NO_WINDOW (widget))
{
gdk_window_set_user_data (widget->window, NULL);
gdk_window_destroy (widget->window);
widget->window = NULL;
}
else
{
g_object_unref (widget->window);
widget->window = NULL;
}
gtk_selection_remove_all (widget);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED);
}
static void
gtk_widget_real_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
requisition->width = widget->requisition.width;
requisition->height = widget->requisition.height;
}
/**
* _gtk_widget_peek_colormap:
*
* Returns colormap currently pushed by gtk_widget_push_colormap, if any.
*
* Return value: the currently pushed colormap, or %NULL if there is none.
**/
GdkColormap*
_gtk_widget_peek_colormap (void)
{
if (colormap_stack)
return (GdkColormap*) colormap_stack->data;
return NULL;
}
static void
gtk_widget_propagate_state (GtkWidget *widget,
GtkStateData *data)
{
guint8 old_state;
/* don't call this function with state==GTK_STATE_INSENSITIVE,
* parent_sensitive==TRUE on a sensitive widget
*/
old_state = GTK_WIDGET_STATE (widget);
if (data->parent_sensitive)
{
GTK_WIDGET_SET_FLAGS (widget, GTK_PARENT_SENSITIVE);
if (GTK_WIDGET_IS_SENSITIVE (widget))
{
if (data->state_restoration)
GTK_WIDGET_STATE (widget) = GTK_WIDGET_SAVED_STATE (widget);
else
GTK_WIDGET_STATE (widget) = data->state;
}
else
{
GTK_WIDGET_STATE (widget) = GTK_STATE_INSENSITIVE;
if (!data->state_restoration &&
data->state != GTK_STATE_INSENSITIVE)
GTK_WIDGET_SAVED_STATE (widget) = data->state;
}
}
else
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_PARENT_SENSITIVE);
if (!data->state_restoration)
{
if (data->state != GTK_STATE_INSENSITIVE)
GTK_WIDGET_SAVED_STATE (widget) = data->state;
}
else if (GTK_WIDGET_STATE (widget) != GTK_STATE_INSENSITIVE)
GTK_WIDGET_SAVED_STATE (widget) = GTK_WIDGET_STATE (widget);
GTK_WIDGET_STATE (widget) = GTK_STATE_INSENSITIVE;
}
if (gtk_widget_is_focus (widget) && !GTK_WIDGET_IS_SENSITIVE (widget))
{
GtkWidget *window;
window = gtk_widget_get_toplevel (widget);
if (window && GTK_WIDGET_TOPLEVEL (window))
gtk_window_set_focus (GTK_WINDOW (window), NULL);
}
if (old_state != GTK_WIDGET_STATE (widget))
{
g_object_ref (widget);
if (!GTK_WIDGET_IS_SENSITIVE (widget) && GTK_WIDGET_HAS_GRAB (widget))
gtk_grab_remove (widget);
g_signal_emit (widget, widget_signals[STATE_CHANGED], 0, old_state);
if (GTK_IS_CONTAINER (widget))
{
data->parent_sensitive = (GTK_WIDGET_IS_SENSITIVE (widget) != FALSE);
data->state = GTK_WIDGET_STATE (widget);
if (data->use_forall)
gtk_container_forall (GTK_CONTAINER (widget),
(GtkCallback) gtk_widget_propagate_state,
data);
else
gtk_container_foreach (GTK_CONTAINER (widget),
(GtkCallback) gtk_widget_propagate_state,
data);
}
g_object_unref (widget);
}
}
/**
* _gtk_widget_get_aux_info:
* @widget: a #GtkWidget
* @create: if %TRUE, create the structure if it doesn't exist
*
* Get the #GtkWidgetAuxInfo structure for the widget.
*
* Return value: the #GtkAuxInfo structure for the widget, or
* %NULL if @create is %FALSE and one doesn't already exist.
**/
GtkWidgetAuxInfo*
_gtk_widget_get_aux_info (GtkWidget *widget,
gboolean create)
{
GtkWidgetAuxInfo *aux_info;
aux_info = g_object_get_qdata (G_OBJECT (widget), quark_aux_info);
if (!aux_info && create)
{
if (!aux_info_mem_chunk)
aux_info_mem_chunk = g_mem_chunk_new ("widget aux info mem chunk",
sizeof (GtkWidgetAuxInfo),
1024, G_ALLOC_AND_FREE);
aux_info = g_chunk_new (GtkWidgetAuxInfo, aux_info_mem_chunk);
aux_info->width = -1;
aux_info->height = -1;
aux_info->x = 0;
aux_info->y = 0;
aux_info->x_set = FALSE;
aux_info->y_set = FALSE;
g_object_set_qdata (G_OBJECT (widget), quark_aux_info, aux_info);
}
return aux_info;
}
/*****************************************
* gtk_widget_aux_info_destroy:
*
* arguments:
*
* results:
*****************************************/
static void
gtk_widget_aux_info_destroy (GtkWidgetAuxInfo *aux_info)
{
g_mem_chunk_free (aux_info_mem_chunk, aux_info);
}
static void
gtk_widget_shape_info_destroy (GtkWidgetShapeInfo *info)
{
g_object_unref (info->shape_mask);
g_free (info);
}
/**
* gtk_widget_shape_combine_mask:
* @widget: a #GtkWidget.
* @shape_mask: shape to be added, or %NULL to remove an existing shape.
* @offset_x: X position of shape mask with respect to @window.
* @offset_y: Y position of shape mask with respect to @window.
*
* Sets a shape for this widget's GDK window. This allows for
* transparent windows etc., see gdk_window_shape_combine_mask()
* for more information.
**/
void
gtk_widget_shape_combine_mask (GtkWidget *widget,
GdkBitmap *shape_mask,
gint offset_x,
gint offset_y)
{
GtkWidgetShapeInfo* shape_info;
g_return_if_fail (GTK_IS_WIDGET (widget));
/* set_shape doesn't work on widgets without gdk window */
g_return_if_fail (!GTK_WIDGET_NO_WINDOW (widget));
if (!shape_mask)
{
GTK_PRIVATE_UNSET_FLAG (widget, GTK_HAS_SHAPE_MASK);
if (widget->window)
gdk_window_shape_combine_mask (widget->window, NULL, 0, 0);
g_object_set_qdata (G_OBJECT (widget), quark_shape_info, NULL);
}
else
{
GTK_PRIVATE_SET_FLAG (widget, GTK_HAS_SHAPE_MASK);
shape_info = g_new (GtkWidgetShapeInfo, 1);
g_object_set_qdata_full (G_OBJECT (widget), quark_shape_info, shape_info,
(GDestroyNotify) gtk_widget_shape_info_destroy);
shape_info->shape_mask = g_object_ref (shape_mask);
shape_info->offset_x = offset_x;
shape_info->offset_y = offset_y;
/* set shape if widget has a gdk window allready.
* otherwise the shape is scheduled to be set by gtk_widget_realize.
*/
if (widget->window)
gdk_window_shape_combine_mask (widget->window, shape_mask,
offset_x, offset_y);
}
}
static void
gtk_reset_shapes_recurse (GtkWidget *widget,
GdkWindow *window)
{
gpointer data;
GList *list;
gdk_window_get_user_data (window, &data);
if (data != widget)
return;
gdk_window_shape_combine_mask (window, NULL, 0, 0);
for (list = gdk_window_peek_children (window); list; list = list->next)
gtk_reset_shapes_recurse (widget, list->data);
}
/**
* gtk_widget_reset_shapes:
* @widget: a #GtkWidget.
*
* Recursively resets the shape on this widget and its descendants.
**/
void
gtk_widget_reset_shapes (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_WIDGET_REALIZED (widget));
if (!GTK_WIDGET_HAS_SHAPE_MASK (widget))
gtk_reset_shapes_recurse (widget, widget->window);
}
/**
* gtk_widget_ref:
* @widget: a #GtkWidget
*
* Adds a reference to a widget. This function is exactly the same
* as calling g_object_ref(), and exists mostly for historical
* reasons. It can still be convenient to avoid casting a widget
* to a #GObject, it saves a small amount of typing.
*
* Return value: the widget that was referenced
**/
GtkWidget*
gtk_widget_ref (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
return (GtkWidget*) g_object_ref ((GObject*) widget);
}
/**
* gtk_widget_unref:
* @widget: a #GtkWidget
*
* Inverse of gtk_widget_ref(). Equivalent to g_object_unref().
*
**/
void
gtk_widget_unref (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_unref ((GObject*) widget);
}
/* style properties
*/
/**
* gtk_widget_class_install_style_property_parser:
* @klass: a #GtkWidgetClass
* @pspec: the #GParamSpec for the style property
* @parser: the parser for the style property
*
* Installs a style property on a widget class.
**/
void
gtk_widget_class_install_style_property_parser (GtkWidgetClass *klass,
GParamSpec *pspec,
GtkRcPropertyParser parser)
{
g_return_if_fail (GTK_IS_WIDGET_CLASS (klass));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
g_return_if_fail (pspec->flags & G_PARAM_READABLE);
g_return_if_fail (!(pspec->flags & (G_PARAM_CONSTRUCT_ONLY | G_PARAM_CONSTRUCT)));
if (g_param_spec_pool_lookup (style_property_spec_pool, pspec->name, G_OBJECT_CLASS_TYPE (klass), FALSE))
{
g_warning (G_STRLOC ": class `%s' already contains a style property named `%s'",
G_OBJECT_CLASS_NAME (klass),
pspec->name);
return;
}
g_param_spec_ref (pspec);
g_param_spec_sink (pspec);
g_param_spec_set_qdata (pspec, quark_property_parser, (gpointer) parser);
g_param_spec_pool_insert (style_property_spec_pool, pspec, G_OBJECT_CLASS_TYPE (klass));
}
/**
* gtk_widget_class_install_style_property:
* @klass: a #GtkWidgetClass
* @pspec: the #GParamSpec for the property
*
* Installs a style property on a widget class. The parser for the
* style property is determined by the value type of @pspec.
**/
void
gtk_widget_class_install_style_property (GtkWidgetClass *klass,
GParamSpec *pspec)
{
GtkRcPropertyParser parser;
g_return_if_fail (GTK_IS_WIDGET_CLASS (klass));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
parser = _gtk_rc_property_parser_from_type (G_PARAM_SPEC_VALUE_TYPE (pspec));
gtk_widget_class_install_style_property_parser (klass, pspec, parser);
}
/**
* gtk_widget_class_find_style_property:
* @klass: a #GtkWidgetClass
* @property_name: the name of the style property to find
* @returns: the #GParamSpec of the style property or %NULL if @class has no
* style property with that name.
*
* Finds a style property of a widget class by name.
*
* Since: 2.2
*/
GParamSpec*
gtk_widget_class_find_style_property (GtkWidgetClass *klass,
const gchar *property_name)
{
g_return_val_if_fail (property_name != NULL, NULL);
return g_param_spec_pool_lookup (style_property_spec_pool,
property_name,
G_OBJECT_CLASS_TYPE (klass),
TRUE);
}
/**
* gtk_widget_class_list_style_properties:
* @klass: a #GtkWidgetClass
* @n_properties: location to return the number of style properties found
* @returns: an newly allocated array of #GParamSpec*. The array must be freed with g_free().
*
* Returns all style properties of a widget class.
*
* Since: 2.2
*/
GParamSpec**
gtk_widget_class_list_style_properties (GtkWidgetClass *klass,
guint *n_properties)
{
GParamSpec **pspecs;
guint n;
pspecs = g_param_spec_pool_list (style_property_spec_pool,
G_OBJECT_CLASS_TYPE (klass),
&n);
if (n_properties)
*n_properties = n;
return pspecs;
}
/**
* gtk_widget_style_get_property:
* @widget: a #GtkWidget
* @property_name: the name of a style property
* @value: location to return the property value
*
* Gets the value of a style property of @widget.
*/
void
gtk_widget_style_get_property (GtkWidget *widget,
const gchar *property_name,
GValue *value)
{
GParamSpec *pspec;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
g_object_ref (widget);
pspec = g_param_spec_pool_lookup (style_property_spec_pool,
property_name,
G_OBJECT_TYPE (widget),
TRUE);
if (!pspec)
g_warning ("%s: widget class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (widget),
property_name);
else
{
const GValue *peek_value;
peek_value = _gtk_style_peek_property_value (widget->style,
G_OBJECT_TYPE (widget),
pspec,
(GtkRcPropertyParser) g_param_spec_get_qdata (pspec, quark_property_parser));
/* auto-conversion of the caller's value type
*/
if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
g_value_copy (peek_value, value);
else if (g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
g_value_transform (peek_value, value);
else
g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
}
g_object_unref (widget);
}
/**
* gtk_widget_style_get_valist:
* @widget: a #GtkWidget
* @first_property_name: the name of the first property to get
* @var_args: a <type>va_list</type> of pairs of property names and
* locations to return the property values, starting with the location
* for @first_property_name.
*
* Non-vararg variant of gtk_widget_style_get(). Used primarily by language
* bindings.
*/
void
gtk_widget_style_get_valist (GtkWidget *widget,
const gchar *first_property_name,
va_list var_args)
{
const gchar *name;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_object_ref (widget);
name = first_property_name;
while (name)
{
const GValue *peek_value;
GParamSpec *pspec;
gchar *error;
pspec = g_param_spec_pool_lookup (style_property_spec_pool,
name,
G_OBJECT_TYPE (widget),
TRUE);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (widget),
name);
break;
}
/* style pspecs are always readable so we can spare that check here */
peek_value = _gtk_style_peek_property_value (widget->style,
G_OBJECT_TYPE (widget),
pspec,
(GtkRcPropertyParser) g_param_spec_get_qdata (pspec, quark_property_parser));
G_VALUE_LCOPY (peek_value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
name = va_arg (var_args, gchar*);
}
g_object_unref (widget);
}
/**
* gtk_widget_style_get:
* @widget: a #GtkWidget
* @first_property_name: the name of the first property to get
* @Varargs: pairs of property names and locations to
* return the property values, starting with the location for
* @first_property_name, terminated by %NULL.
*
* Gets the values of a multiple style properties of @widget.
*/
void
gtk_widget_style_get (GtkWidget *widget,
const gchar *first_property_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_WIDGET (widget));
va_start (var_args, first_property_name);
gtk_widget_style_get_valist (widget, first_property_name, var_args);
va_end (var_args);
}
/**
* gtk_widget_path:
* @widget: a #GtkWidget
* @path_length: location to store length of the path, or %NULL
* @path: location to store allocated path string, or %NULL
* @path_reversed: location to store allocated reverse path string, or %NULL
*
* Obtains the full path to @widget. The path is simply the name of a
* widget and all its parents in the container hierarchy, separated by
* periods. The name of a widget comes from
* gtk_widget_get_name(). Paths are used to apply styles to a widget
* in gtkrc configuration files. Widget names are the type of the
* widget by default (e.g. "GtkButton") or can be set to an
* application-specific value with gtk_widget_set_name(). By setting
* the name of a widget, you allow users or theme authors to apply
* styles to that specific widget in their gtkrc
* file. @path_reversed_p fills in the path in reverse order,
* i.e. starting with @widget's name instead of starting with the name
* of @widget's outermost ancestor.
*
**/
void
gtk_widget_path (GtkWidget *widget,
guint *path_length,
gchar **path,
gchar **path_reversed)
{
static gchar *rev_path = NULL;
static guint tmp_path_len = 0;
guint len;
g_return_if_fail (GTK_IS_WIDGET (widget));
len = 0;
do
{
const gchar *string;
const gchar *s;
gchar *d;
guint l;
string = gtk_widget_get_name (widget);
l = strlen (string);
while (tmp_path_len <= len + l + 1)
{
tmp_path_len += INIT_PATH_SIZE;
rev_path = g_realloc (rev_path, tmp_path_len);
}
s = string + l - 1;
d = rev_path + len;
while (s >= string)
*(d++) = *(s--);
len += l;
widget = widget->parent;
if (widget)
rev_path[len++] = '.';
else
rev_path[len++] = 0;
}
while (widget);
if (path_length)
*path_length = len - 1;
if (path_reversed)
*path_reversed = g_strdup (rev_path);
if (path)
{
*path = g_strdup (rev_path);
g_strreverse (*path);
}
}
/**
* gtk_widget_class_path:
* @widget: a #GtkWidget
* @path_length: location to store the length of the class path, or %NULL
* @path: location to store the class path as an allocated string, or %NULL
* @path_reversed: location to store the reverse class path as an allocated string, or %NULL
*
* Same as gtk_widget_path(), but always uses the name of a widget's type,
* never uses a custom name set with gtk_widget_set_name().
*
**/
void
gtk_widget_class_path (GtkWidget *widget,
guint *path_length,
gchar **path,
gchar **path_reversed)
{
static gchar *rev_path = NULL;
static guint tmp_path_len = 0;
guint len;
g_return_if_fail (GTK_IS_WIDGET (widget));
len = 0;
do
{
const gchar *string;
const gchar *s;
gchar *d;
guint l;
string = g_type_name (GTK_WIDGET_TYPE (widget));
l = strlen (string);
while (tmp_path_len <= len + l + 1)
{
tmp_path_len += INIT_PATH_SIZE;
rev_path = g_realloc (rev_path, tmp_path_len);
}
s = string + l - 1;
d = rev_path + len;
while (s >= string)
*(d++) = *(s--);
len += l;
widget = widget->parent;
if (widget)
rev_path[len++] = '.';
else
rev_path[len++] = 0;
}
while (widget);
if (path_length)
*path_length = len - 1;
if (path_reversed)
*path_reversed = g_strdup (rev_path);
if (path)
{
*path = g_strdup (rev_path);
g_strreverse (*path);
}
}
/**
* gtk_requisition_copy:
* @requisition: a #GtkRequisition.
* @returns: a copy of @requisition.
*
* Copies a #GtkRequisition.
**/
GtkRequisition *
gtk_requisition_copy (const GtkRequisition *requisition)
{
return (GtkRequisition *)g_memdup (requisition, sizeof (GtkRequisition));
}
/**
* gtk_requisition_free:
* @requisition: a #GtkRequisition.
*
* Frees a #GtkRequisition.
**/
void
gtk_requisition_free (GtkRequisition *requisition)
{
g_free (requisition);
}
GType
gtk_requisition_get_type (void)
{
static GType our_type = 0;
if (our_type == 0)
our_type = g_boxed_type_register_static ("GtkRequisition",
(GBoxedCopyFunc) gtk_requisition_copy,
(GBoxedFreeFunc) gtk_requisition_free);
return our_type;
}
AtkObject*
gtk_widget_get_accessible (GtkWidget *widget)
{
GtkWidgetClass *klass;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
klass = GTK_WIDGET_GET_CLASS (widget);
g_return_val_if_fail (klass->get_accessible != NULL, NULL);
return klass->get_accessible (widget);
}
static AtkObject*
gtk_widget_real_get_accessible (GtkWidget *widget)
{
AtkObject* accessible;
accessible = g_object_get_qdata (G_OBJECT (widget),
quark_accessible_object);
if (!accessible)
{
AtkObjectFactory *factory;
AtkRegistry *default_registry;
default_registry = atk_get_default_registry ();
factory = atk_registry_get_factory (default_registry,
G_TYPE_FROM_INSTANCE (widget));
accessible =
atk_object_factory_create_accessible (factory,
G_OBJECT (widget));
g_object_set_qdata (G_OBJECT (widget),
quark_accessible_object,
accessible);
}
return accessible;
}
/*
* Initialize a AtkImplementorIface instance's virtual pointers as
* appropriate to this implementor's class (GtkWidget).
*/
static void
gtk_widget_accessible_interface_init (AtkImplementorIface *iface)
{
iface->ref_accessible = gtk_widget_ref_accessible;
}
static AtkObject*
gtk_widget_ref_accessible (AtkImplementor *implementor)
{
AtkObject *accessible;
accessible = gtk_widget_get_accessible (GTK_WIDGET (implementor));
if (accessible)
g_object_ref (accessible);
return accessible;
}
/**
* gtk_widget_get_clipboard:
* @widget: a #GtkWidget
* @selection: a #GdkAtom which identifies the clipboard
* to use. %GDK_SELECTION_CLIPBOARD gives the
* default clipboard. Another common value
* is %GDK_SELECTION_PRIMARY, which gives
* the primary X selection.
*
* Returns the clipboard object for the given selection to
* be used with @widget. @widget must have a #GdkDisplay
* associated with it, so must be attached to a toplevel
* window.
*
* Return value: the appropriate clipboard object. If no
* clipboard already exists, a new one will
* be created. Once a clipboard object has
* been created, it is persistent for all time.
*
* Since: 2.2
**/
GtkClipboard *
gtk_widget_get_clipboard (GtkWidget *widget, GdkAtom selection)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (gtk_widget_has_screen (widget), NULL);
return gtk_clipboard_get_for_display (gtk_widget_get_display (widget),
selection);
}
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