/* 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 #include #include #include #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 #include #include "gdk/gdkkeysyms.h" #include "gtkintl.h" #include "gtkaccessible.h" #include "gtktooltips.h" #include "gtkinvisible.h" #include "gtkalias.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, CAN_ACTIVATE_ACCEL, GRAB_BROKEN, 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, PROP_NO_SHOW_ALL }; 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_update_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_queue_shallow_draw (GtkWidget *widget); static gboolean gtk_widget_real_can_activate_accel (GtkWidget *widget, guint signal_id); static void gtk_widget_set_usize_internal (GtkWidget *widget, gint width, gint height); static void gtk_widget_get_draw_rectangle (GtkWidget *widget, GdkRectangle *rect); /* --- variables --- */ static gpointer parent_class = NULL; static guint widget_signals[LAST_SIGNAL] = { 0 }; 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; static GQuark quark_mnemonic_labels = 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, I_("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"); quark_mnemonic_labels = g_quark_from_static_string ("gtk-mnemonic-labels"); 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->can_activate_accel = gtk_widget_real_can_activate_accel; klass->grab_broken_event = 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", P_("Widget name"), P_("The name of the widget"), NULL, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_PARENT, g_param_spec_object ("parent", P_("Parent widget"), P_("The parent widget of this widget. Must be a Container widget"), GTK_TYPE_CONTAINER, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_WIDTH_REQUEST, g_param_spec_int ("width-request", P_("Width request"), P_("Override for width request of the widget, or -1 if natural request should be used"), -1, G_MAXINT, -1, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_HEIGHT_REQUEST, g_param_spec_int ("height-request", P_("Height request"), P_("Override for height request of the widget, or -1 if natural request should be used"), -1, G_MAXINT, -1, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_VISIBLE, g_param_spec_boolean ("visible", P_("Visible"), P_("Whether the widget is visible"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SENSITIVE, g_param_spec_boolean ("sensitive", P_("Sensitive"), P_("Whether the widget responds to input"), TRUE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_APP_PAINTABLE, g_param_spec_boolean ("app-paintable", P_("Application paintable"), P_("Whether the application will paint directly on the widget"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CAN_FOCUS, g_param_spec_boolean ("can-focus", P_("Can focus"), P_("Whether the widget can accept the input focus"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_HAS_FOCUS, g_param_spec_boolean ("has-focus", P_("Has focus"), P_("Whether the widget has the input focus"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_IS_FOCUS, g_param_spec_boolean ("is-focus", P_("Is focus"), P_("Whether the widget is the focus widget within the toplevel"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CAN_DEFAULT, g_param_spec_boolean ("can-default", P_("Can default"), P_("Whether the widget can be the default widget"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_HAS_DEFAULT, g_param_spec_boolean ("has-default", P_("Has default"), P_("Whether the widget is the default widget"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_RECEIVES_DEFAULT, g_param_spec_boolean ("receives-default", P_("Receives default"), P_("If TRUE, the widget will receive the default action when it is focused"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_COMPOSITE_CHILD, g_param_spec_boolean ("composite-child", P_("Composite child"), P_("Whether the widget is part of a composite widget"), FALSE, GTK_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_STYLE, g_param_spec_object ("style", P_("Style"), P_("The style of the widget, which contains information about how it will look (colors etc)"), GTK_TYPE_STYLE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_EVENTS, g_param_spec_flags ("events", P_("Events"), P_("The event mask that decides what kind of GdkEvents this widget gets"), GDK_TYPE_EVENT_MASK, GDK_STRUCTURE_MASK, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_EXTENSION_EVENTS, g_param_spec_enum ("extension-events", P_("Extension events"), P_("The mask that decides what kind of extension events this widget gets"), GDK_TYPE_EXTENSION_MODE, GDK_EXTENSION_EVENTS_NONE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_NO_SHOW_ALL, g_param_spec_boolean ("no-show-all", P_("No show all"), P_("Whether gtk_widget_show_all() should not affect this widget"), FALSE, GTK_PARAM_READWRITE)); widget_signals[SHOW] = g_signal_new (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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); /** * GtkWidget::style-set: * @widget: the object on which the signal is emitted * @previous_style: the previous style, or %NULL if the widget * just got its initial style * * The style-set signal is emitted when a new style has been set * on a widget. Note that style-modifying functions like * gtk_widget_modify_base() also cause this signal to be emitted. */ widget_signals[STYLE_SET] = g_signal_new (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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); /** * GtkWidget::delete-event: * @widget: the object which received the signal. * @event: the event which triggered this signal * * The ::delete-event signal is emitted if a user requests that * a toplevel window is closed. The default handler for this signal * destroys the window. Connecting gtk_widget_hide_on_delete() to * this signal will cause the window to be hidden instead, so that * it can later be shown again without reconstructing it. * * Returns: %TRUE to stop other handlers from being invoked for the event. * %FALSE to propagate the event further. */ widget_signals[DELETE_EVENT] = g_signal_new (I_("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); /** * GtkWidget::destroy-event: * @widget: the object which received the signal. * @event: the event which triggered this signal * * The ::destroy-event signal is emitted when a #GdkWindow is destroyed. * You rarely get this signal, because most widgets disconnect themselves * from their window before they destroy it, so no widget owns the * window at destroy time. * * Returns: %TRUE to stop other handlers from being invoked for the event. * %FALSE to propagate the event further. */ widget_signals[DESTROY_EVENT] = g_signal_new (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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 (I_("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); /** * GtkWidget::drag-leave: * @widget: the object which received the signal. * @drag_context: the drag context * @time: the timestamp of the motion event * * The ::drag-leave signal is emitted on the drop site when the cursor * leaves the widget. A typical reason to connect to this signal is to * undo things done in ::drag-motion, e.g. undo highlighting with * gtk_drag_unhighlight() */ widget_signals[DRAG_LEAVE] = g_signal_new (I_("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); /** * GtkWidget::drag-begin: * @widget: the object which received the signal. * @drag_context: the drag context * * The ::drag-begin signal is emitted on the drag source when a drag is started. * A typical reason to connect to this signal is to set up a custom drag icon with * gtk_drag_source_set_icon(). */ widget_signals[DRAG_BEGIN] = g_signal_new (I_("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); /** * GtkWidget::drag-end: * @widget: the object which received the signal. * @drag_context: the drag context * * The ::drag-end signal is emitted on the drag source when a drag is finished. * A typical reason to connect to this signal is to undo things done in ::drag-begin. */ widget_signals[DRAG_END] = g_signal_new (I_("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); /** * GtkWidget::drag-data-delete: * @widget: the object which received the signal. * @drag_context: the drag context * * The ::drag-data-delete signal is emitted on the drag source when a drag * with the action %GDK_ACTION_MOVE is successfully completed. The signal * handler is responsible for deleting the data that has been dropped. What * "delete" means, depends on the context of the drag operation. */ widget_signals[DRAG_DATA_DELETE] = g_signal_new (I_("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); /** * GtkWidget::drag-motion: * @widget: the object which received the signal. * @drag_context: the drag context * @x: the x coordinate of the current cursor position * @y: the y coordinate of the current cursor position * @time: the timestamp of the motion event * @returns: whether the cursor position is in a drop zone * * The ::drag-motion signal is emitted on the drop site when the user * moves the cursor over the widget during a drag. The signal handler * must determine whether the cursor position is in a drop zone or not. * If it is not in a drop zone, it returns %FALSE and no further processing * is necessary. Otherwise, the handler returns %TRUE. In this case, the * handler is responsible for providing the necessary information for * displaying feedback to the user, by calling gdk_drag_status(). If the * decision whether the drop will be accepted or rejected can't be made * based solely on the cursor position and the type of the data, the handler * may inspect the dragged data by calling gtk_drag_get_data() and defer the * gdk_drag_status() call to the ::drag-data-received handler. * * Note that there is no ::drag-enter signal. The drag receiver has to keep * track of whether he has received any ::drag-motion signals since the last * ::drag-leave and if not, treat the ::drag-motion signal as an "enter" signal. * Upon an "enter", the handler will typically highlight the drop site with * gtk_drag_highlight(). * * * static void * drag_motion (GtkWidget *widget, * GdkDragContext *context, * gint x, * gint y, * guint time) * { * GdkAtom target; * * PrivateData *private_data = GET_PRIVATE_DATA (widget); * * if (!private_data->drag_highlight) * { * private_data->drag_highlight = 1; * gtk_drag_highlight (widget); * } * * target = gtk_drag_dest_find_target (widget, context, NULL); * if (target == GDK_NONE) * gdk_drag_status (context, 0, time); * else * { * private_data->pending_status = context->suggested_action; * gtk_drag_get_data (widget, context, target, time); * } * * return TRUE; * } * * static void * drag_data_received (GtkWidget *widget, * GdkDragContext *context, * gint x, * gint y, * GtkSelectionData *selection_data, * guint info, * guint time) * { * PrivateData *private_data = GET_PRIVATE_DATA (widget); * * if (private_data->suggested_action) * { * private_data->suggested_action = 0; * * /* We are getting this data due to a request in drag_motion, * * rather than due to a request in drag_drop, so we are just * * supposed to call gdk_drag_status(), not actually paste in * * the data. * */ * str = gtk_selection_data_get_text (selection_data); * if (!data_is_acceptable (str)) * gdk_drag_status (context, 0, time); * else * gdk_drag_status (context, private_data->suggested_action, time); * } * else * { * /* accept the drop */ * } * } * */ widget_signals[DRAG_MOTION] = g_signal_new (I_("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); /** * GtkWidget::drag-drop: * @widget: the object which received the signal. * @drag_context: the drag context * @x: the x coordinate of the current cursor position * @y: the y coordinate of the current cursor position * @time: the timestamp of the motion event * @returns: whether the cursor position is in a drop zone * * The ::drag-drop signal is emitted on the drop site when the user drops the * data onto the widget. The signal handler must determine whether the cursor * position is in a drop zone or not. If it is not in a drop zone, it returns * %FALSE and no further processing is necessary. Otherwise, the handler returns * %TRUE. In this case, the handler must ensure that gtk_drag_finish() is called * to let the source know that the drop is done. The call to gtk_drag_finish() * can be done either directly or in a ::drag-data-received handler which gets * triggered by calling gtk_drop_get_data() to receive the data for one or more * of the supported targets. */ widget_signals[DRAG_DROP] = g_signal_new (I_("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); /** * GtkWidget::drag-data-get: * @widget: the object which received the signal. * @drag_context: the drag context * @data: the #GtkSelectionData to be filled with the dragged data * @info: the info that has been registered with the target in the #GtkTargetList. * @time: the timestamp at which the data was requested * * The ::drag-data-get signal is emitted on the drag source when the drop site * requests the data which is dragged. It is the responsibility of the signal * handler to fill @data with the data in the format which is indicated by @info. * See gtk_selection_data_set() and gtk_selection_data_set_text(). */ widget_signals[DRAG_DATA_GET] = g_signal_new (I_("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 * * The ::drag-data-received signal is emitted on the drop site when the dragged * data has been received. If the data was received in order to determine whether * the drop will be accepted, the handler is expected to call gdk_drag_status() * and not finish the drag. If the data was received in * response to a ::drag-drop signal (and this is the last target to be received), * the handler for this signal is expected to process the received data and then * call gtk_drag_finish(), setting the @success 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 %GDK_ACTION_ASK as shown in the following * example: * * 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); * } * */ widget_signals[DRAG_DATA_RECEIVED] = g_signal_new (I_("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 (I_("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 (I_("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 (I_("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 (I_("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); /** * GtkWidget::grab-broken-event: * @widget: the object which received the signal * @event: the #GdkEventGrabBroken event * * Emitted when a pointer or keyboard grab on a window belonging * to @widget gets broken. * * On X11, this happens when the grab window becomes unviewable * (i.e. it or one of its ancestors is unmapped), or if the same * application grabs the pointer or keyboard again. * * Returns: %TRUE to stop other handlers from being invoked for the event. * %FALSE to propagate the event further. * * Since: 2.8 */ widget_signals[GRAB_BROKEN] = g_signal_new (I_("grab_broken_event"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkWidgetClass, grab_broken_event), _gtk_boolean_handled_accumulator, NULL, _gtk_marshal_BOOLEAN__BOXED, G_TYPE_BOOLEAN, 1, GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE); /** * GtkWidget::popup-menu * @widget: the object which received the signal * @returns: TRUE if a menu was activated * * This signal gets emitted whenever a widget should pop up a context-sensitive * menu. This usually happens through the standard key binding mechanism; by * pressing a certain key while a widget is focused, the user can cause the * widget to pop up a menu. For example, the #GtkEntry widget creates a menu * with clipboard commands. See for an * example of how to use this signal. */ widget_signals[POPUP_MENU] = g_signal_new (I_("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 (I_("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 (I_("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 (I_("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); /** * GtkWidget::can-activate-accel: * @widget: the object which received the signal * @signal_id: the ID of a signal installed on @widget * @returns: %TRUE if the signal can be activated. * * Determines whether an accelerator that activates the signal * identified by @signal_id can currently be activated. * This signal is present to allow applications and derived * widgets to override the default #GtkWidget handling * for determining whether an accelerator can be activated. */ widget_signals[CAN_ACTIVATE_ACCEL] = g_signal_new (I_("can_activate_accel"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkWidgetClass, can_activate_accel), _gtk_boolean_handled_accumulator, NULL, _gtk_marshal_BOOLEAN__UINT, G_TYPE_BOOLEAN, 1, G_TYPE_UINT); 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", P_("Interior Focus"), P_("Whether to draw the focus indicator inside widgets"), TRUE, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_int ("focus-line-width", P_("Focus linewidth"), P_("Width, in pixels, of the focus indicator line"), 0, G_MAXINT, 1, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_string ("focus-line-pattern", P_("Focus line dash pattern"), P_("Dash pattern used to draw the focus indicator"), "\1\1", GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_int ("focus-padding", P_("Focus padding"), P_("Width, in pixels, between focus indicator and the widget 'box'"), 0, G_MAXINT, 1, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_boxed ("cursor-color", P_("Cursor color"), P_("Color with which to draw insertion cursor"), GDK_TYPE_COLOR, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_boxed ("secondary-cursor-color", P_("Secondary cursor color"), P_("Color with which to draw the secondary insertion cursor when editing mixed right-to-left and left-to-right text"), GDK_TYPE_COLOR, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_float ("cursor-aspect-ratio", P_("Cursor line aspect ratio"), P_("Aspect ratio with which to draw insertion cursor"), 0.0, 1.0, 0.04, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_boxed ("draw-border", P_("Draw Border"), P_("Size of areas outside the widget's allocation to draw"), GTK_TYPE_BORDER, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_boxed ("link-color", P_("Unvisited Link Color"), P_("Color of unvisited links"), GDK_TYPE_COLOR, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (klass, g_param_spec_boxed ("visited-link-color", P_("Visited Link Color"), P_("Color of visited links"), GDK_TYPE_COLOR, GTK_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; case PROP_NO_SHOW_ALL: gtk_widget_set_no_show_all (widget, g_value_get_boolean (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; case PROP_NO_SHOW_ALL: g_value_set_boolean (value, gtk_widget_get_no_show_all (widget)); 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 * child property @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: * gtk_widget_new (GTK_TYPE_LABEL, "label", "Hello World", "xalign", * 0.0, NULL) 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)) { if (GTK_WIDGET_IN_REPARENT (widget)) gtk_widget_unmap (widget); else 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); g_object_ref (widget); if (toplevel != widget && GTK_WIDGET_TOPLEVEL (toplevel)) _gtk_window_unset_focus_and_default (GTK_WINDOW (toplevel), 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)); if ((GTK_WIDGET_FLAGS (widget) & GTK_NO_SHOW_ALL) != 0) return; 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)); if ((GTK_WIDGET_FLAGS (widget) & GTK_NO_SHOW_ALL) != 0) return; 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); } static void widget_add_child_draw_rectangle (GtkWidget *widget, GdkRectangle *rect) { GdkRectangle child_rect; if (!GTK_WIDGET_MAPPED (widget) || widget->window != widget->parent->window) return; gtk_widget_get_draw_rectangle (widget, &child_rect); gdk_rectangle_union (rect, &child_rect, rect); } static void gtk_widget_get_draw_rectangle (GtkWidget *widget, GdkRectangle *rect) { if (GTK_WIDGET_NO_WINDOW (widget)) { GtkBorder *draw_border = NULL; *rect = widget->allocation; gtk_widget_style_get (widget, "draw-border", &draw_border, NULL); if (draw_border) { rect->x -= draw_border->top; rect->y -= draw_border->left; rect->width += draw_border->left + draw_border->right; rect->height += draw_border->top + draw_border->bottom; } if (GTK_IS_CONTAINER (widget)) gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback)widget_add_child_draw_rectangle, rect); } else { rect->x = 0; rect->y = 0; rect->width = widget->allocation.width; rect->height = widget->allocation.height; } } /** * 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) { GdkRectangle rect; g_return_if_fail (GTK_IS_WIDGET (widget)); gtk_widget_get_draw_rectangle (widget, &rect); gtk_widget_queue_draw_area (widget, rect.x, rect.y, rect.width, rect.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) { g_return_if_fail (GTK_IS_WIDGET (widget)); if (GTK_WIDGET_REALIZED (widget)) gtk_widget_queue_shallow_draw (widget); _gtk_size_group_queue_resize (widget); } /** * gtk_widget_queue_resize_no_redraw: * @widget: a #GtkWidget * * This function works like gtk_widget_queue_resize(), except that the * widget is not invalidated. * * Since: 2.4 **/ void gtk_widget_queue_resize_no_redraw (GtkWidget *widget) { g_return_if_fail (GTK_IS_WIDGET (widget)); _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_REALIZED (widget)) return; if (!GTK_WIDGET_NO_WINDOW (widget) && widget->parent) { 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_queue_shallow_draw: * @widget: a #GtkWidget * * Like gtk_widget_queue_draw(), but only windows owned * by @widget are invalidated. **/ static void gtk_widget_queue_shallow_draw (GtkWidget *widget) { GdkRectangle rect; GdkRegion *region; g_return_if_fail (GTK_IS_WIDGET (widget)); if (!GTK_WIDGET_REALIZED (widget)) return; gtk_widget_get_draw_rectangle (widget, &rect); /* get_draw_rectangle() gives us window coordinates, we * need to convert to the coordinates that widget->allocation * is in. */ if (!GTK_WIDGET_NO_WINDOW (widget) && widget->parent) { int wx, wy; gdk_window_get_position (widget->window, &wx, &wy); rect.x += wx; rect.y += wy; } region = gdk_region_rectangle (&rect); gtk_widget_invalidate_widget_windows (widget, region); gdk_region_destroy (region); } /** * 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)); #ifdef G_ENABLE_DEBUG if (gtk_debug_flags & GTK_DEBUG_GEOMETRY) { gint depth; GtkWidget *parent; const gchar *name; depth = 0; parent = widget; while (parent) { depth++; parent = gtk_widget_get_parent (parent); } name = g_type_name (G_OBJECT_TYPE (G_OBJECT (widget))); g_print ("gtk_widget_size_allocate: %*s%s %d %d\n", 2 * depth, " ", name, allocation->width, allocation->height); } #endif /* G_ENABLE_DEBUG */ alloc_needed = GTK_WIDGET_ALLOC_NEEDED (widget); if (!GTK_WIDGET_REQUEST_NEEDED (widget)) /* Preserve request/allocate ordering */ 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); } } static gboolean gtk_widget_real_can_activate_accel (GtkWidget *widget, guint signal_id) { /* widgets must be onscreen for accels to take effect */ return GTK_WIDGET_IS_SENSITIVE (widget) && GTK_WIDGET_DRAWABLE (widget) && gdk_window_is_viewable (widget->window); } /** * gtk_widget_can_activate_accel: * @widget: a #GtkWidget * @signal_id: the ID of a signal installed on @widget * * Determines whether an accelerator that activates the signal * identified by @signal_id can currently be activated. * This is done by emitting the GtkWidget::can-activate-accel * signal on @widget; if the signal isn't overridden by a * handler or in a derived widget, then the default check is * that the widget must be sensitive, and the widget and all * its ancestors mapped. * * Return value: %TRUE if the accelerator can be activated. * * Since: 2.4 **/ gboolean gtk_widget_can_activate_accel (GtkWidget *widget, guint signal_id) { gboolean can_activate = FALSE; g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); g_signal_emit (widget, widget_signals[CAN_ACTIVATE_ACCEL], 0, signal_id, &can_activate); return can_activate; } 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; gboolean can_activate = gtk_widget_can_activate_accel (closure->data, aclosure->signal_id); if (can_activate) g_signal_emit (closure->data, aclosure->signal_id, 0); /* whether accelerator was handled */ g_value_set_boolean (return_value, can_activate); } 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; 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_slice_free (AccelPath, apath); } /** * gtk_widget_set_accel_path: * @widget: a #GtkWidget * @accel_path: path used to look up 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_slice_new (AccelPath); apath->accel_group = g_object_ref (accel_group); apath->path_quark = g_quark_from_string (accel_path); apath->closure = widget_new_accel_closure (widget, GTK_WIDGET_GET_CLASS (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_shallow_draw (widget); return FALSE; } static gboolean gtk_widget_real_focus_out_event (GtkWidget *widget, GdkEventFocus *event) { gtk_widget_queue_shallow_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); 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; case GDK_GRAB_BROKEN: signal_num = GRAB_BROKEN; 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. 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 { GdkWindow *parent; GList *tmp_list, *children; parent = gdk_window_get_parent (widget->window); if (parent == NULL) gdk_window_reparent (widget->window, new_window, 0, 0); else { children = gdk_window_get_children (parent); 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); if (child == widget) gdk_window_reparent (window, new_window, 0, 0); } g_list_free (children); } } } 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) { GdkRectangle rect; GdkRegion *dest; g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); g_return_val_if_fail (region != NULL, NULL); gtk_widget_get_draw_rectangle (widget, &rect); dest = gdk_region_rectangle (&rect); gdk_region_intersect (dest, region); return dest; } /** * _gtk_widget_grab_notify: * @widget: a #GtkWidget * @was_grabbed: whether a grab is now in effect * * Emits the signal "grab_notify" on @widget. * * Since: 2.6 **/ void _gtk_widget_grab_notify (GtkWidget *widget, gboolean was_grabbed) { g_signal_emit (widget, widget_signals[GRAB_NOTIFY], 0, was_grabbed); } /** * 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 GTK_WIDGET_SET_FLAGS (@widget, * GTK_CAN_DEFAULT). 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) { gchar *new_name; g_return_if_fail (GTK_IS_WIDGET (widget)); new_name = g_strdup (name); g_free (widget->name); widget->name = new_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); } } /** * gtk_widget_set_app_paintable: * @widget: a #GtkWidget * @app_paintable: %TRUE if the application will paint on the widget * * Sets whether the application intends to draw on the widget in * an ::expose-event handler. * * This is a hint to the widget and does not affect the behavior of * the GTK+ core; many widgets ignore this flag entirely. For widgets * that do pay attention to the flag, such as #GtkEventBox and #GtkWindow, * the effect is to suppress default themed drawing of the widget's * background. (Children of the widget will still be drawn.) The application * is then entirely responsible for drawing the widget background. * * Note that the background is still drawn when the widget is mapped. * If this is not suitable (e.g. because you want to make a transparent * window using an RGBA visual), you can work around this by doing: * * gtk_widget_realize (window); * gdk_window_set_back_pixmap (window->window, NULL, FALSE); * gtk_widget_show (window); * **/ 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. * * Note: if you turn off double-buffering, you have to handle * expose events, since even the clearing to the background color or * pixmap will not happen automatically (as it is done in * gdk_window_begin_paint()). * **/ 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 the entire widget is queued for drawing when its size * allocation changes. By default, this setting is %TRUE and * the entire widget is redrawn on every size change. If your widget * leaves the upper left 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 does 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 (GTK_IS_WIDGET (parent)); g_return_if_fail (widget != parent); if (widget->parent != NULL) { g_warning ("Can't set a parent on widget which has a parent\n"); return; } if (GTK_WIDGET_TOPLEVEL (widget)) { g_warning ("Can't set a parent on a toplevel widget\n"); return; } /* keep this function in sync with gtk_menu_attach_to_widget() */ g_object_ref_sink (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) { g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (GTK_IS_RC_STYLE (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, const 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, const 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(). * * Note that "no window" widgets (which have the %GTK_NO_WINDOW flag set) * draw on their parent container's window and thus may not draw any background * themselves. This is the case for e.g. #GtkLabel. To modify the background * of such widgets, you have to set the background color on their parent; if you want * to set the background of a rectangular area around a label, try placing the * label in a #GtkEventBox widget and setting the background color on that. **/ void gtk_widget_modify_bg (GtkWidget *widget, GtkStateType state, const 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, const 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(). * * Note that "no window" widgets (which have the %GTK_NO_WINDOW flag set) * draw on their parent container's window and thus may not draw any background * themselves. This is the case for e.g. #GtkLabel. To modify the background * of such widgets, you have to set the base color on their parent; if you want * to set the background of a rectangular area around a label, try placing the * label in a #GtkEventBox widget and setting the base color on that. **/ void gtk_widget_modify_base (GtkWidget *widget, GtkStateType state, const 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) { 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); gtk_widget_update_pango_context (widget); g_signal_emit (widget, widget_signals[STYLE_SET], 0, initial_emission ? NULL : previous_style); g_object_unref (previous_style); if (GTK_WIDGET_ANCHORED (widget) && !initial_emission) gtk_widget_queue_resize (widget); } else if (initial_emission) { gtk_widget_update_pango_context (widget); 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-changed 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; } static void update_pango_context (GtkWidget *widget, PangoContext *context) { pango_context_set_font_description (context, widget->style->font_desc); pango_context_set_base_dir (context, gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR ? PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL); } static void gtk_widget_update_pango_context (GtkWidget *widget) { PangoContext *context = gtk_widget_peek_pango_context (widget); if (context) { GdkScreen *screen; update_pango_context (widget, context); screen = gtk_widget_get_screen_unchecked (widget); if (screen) { pango_cairo_context_set_resolution (context, gdk_screen_get_resolution (screen)); pango_cairo_context_set_font_options (context, gdk_screen_get_font_options (screen)); } } } /** * 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); update_pango_context (widget, context); 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-changed 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. A size of (GtkIconSize)-1 means render at * the size of the source and don't scale (if there are multiple * source sizes, GTK+ picks one of the available sizes). * @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 || size == -1, 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)); g_object_ref (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); } g_object_unref (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; gboolean changed = FALSE; 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 && aux_info->width != width) { g_object_notify (G_OBJECT (widget), "width-request"); aux_info->width = width; changed = TRUE; } if (height > -2 && aux_info->height != height) { g_object_notify (G_OBJECT (widget), "height-request"); aux_info->height = height; changed = TRUE; } if (GTK_WIDGET_VISIBLE (widget) && changed) 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_slice_new (gint); *eventp = events; g_object_set_qdata (G_OBJECT (widget), quark_event_mask, eventp); } else if (eventp) { g_slice_free (gint, eventp); g_object_set_qdata (G_OBJECT (widget), quark_event_mask, NULL); } g_object_notify (G_OBJECT (widget), "events"); } static void gtk_widget_add_events_internal (GtkWidget *widget, gint events, GList *window_list) { GList *l; for (l = window_list; l != NULL; l = l->next) { GdkWindow *window = l->data; gpointer user_data; gdk_window_get_user_data (window, &user_data); if (user_data == widget) { GList *children; gdk_window_set_events (window, gdk_window_get_events (window) | events); children = gdk_window_get_children (window); gtk_widget_add_events_internal (widget, events, children); g_list_free (children); } } } /** * 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_slice_new (gint); *eventp = 0; } *eventp |= events; g_object_set_qdata (G_OBJECT (widget), quark_event_mask, eventp); } else if (eventp) { g_slice_free (gint, eventp); g_object_set_qdata (G_OBJECT (widget), quark_event_mask, NULL); } if (GTK_WIDGET_REALIZED (widget)) { GList *window_list; if (GTK_WIDGET_NO_WINDOW (widget)) window_list = gdk_window_get_children (widget->window); else window_list = g_list_prepend (NULL, widget->window); gtk_widget_add_events_internal (widget, events, window_list); g_list_free (window_list); } 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_slice_new (GdkExtensionMode); *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(); * gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW) * 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. * * GtkWidget *toplevel = gtk_widget_get_toplevel (widget); * if (GTK_WIDGET_TOPLEVEL (toplevel)) * { * [ Perform action on toplevel. ] * } * * * 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, * gtk_widget_get_ancestor (widget, GTK_TYPE_BOX) 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 init() 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: * * 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); * **/ 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) { gtk_widget_update_pango_context (widget); 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); else if (GTK_WIDGET_VISIBLE (widget)) gtk_widget_hide (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); /* Callers of add_mnemonic_label() should disconnect on ::destroy */ g_object_set_qdata (G_OBJECT (widget), quark_mnemonic_labels, 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_slice_free (gint, events); mode = g_object_get_qdata (G_OBJECT (widget), quark_extension_event_mode); if (mode) g_slice_free (GdkExtensionMode, 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) { aux_info = g_slice_new (GtkWidgetAuxInfo); 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_slice_free (GtkWidgetAuxInfo, aux_info); } static void gtk_widget_shape_info_destroy (GtkWidgetShapeInfo *info) { g_object_unref (info->shape_mask); g_slice_free (GtkWidgetShapeInfo, 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_slice_new (GtkWidgetShapeInfo); 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_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 va_list 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 (I_("GtkRequisition"), (GBoxedCopyFunc) gtk_requisition_copy, (GBoxedFreeFunc) gtk_requisition_free); return our_type; } /** * gtk_widget_get_accessible: * @widget: a #GtkWidget * * Returns the accessible object that describes the widget to an * assistive technology. * * If no accessibility library is loaded (i.e. no ATK implementation library is * loaded via GTK_MODULES or via another application library, * such as libgnome), then this #AtkObject instance may be a no-op. Likewise, * if no class-specific #AtkObject implementation is available for the widget * instance in question, it will inherit an #AtkObject implementation from the * first ancestor class for which such an implementation is defined. * * The documentation of the ATK * library contains more information about accessible objects and their uses. * * Returns: the #AtkObject associated with @widget */ 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); } /** * gtk_widget_list_mnemonic_labels: * @widget: a #GtkWidget * * Returns a newly allocated list of the widgets, normally labels, for * which this widget is a the target of a mnemonic (see for example, * gtk_label_set_mnemonic_widget()). * The widgets in the list are not individually referenced. If you * want to iterate through the list and perform actions involving * callbacks that might destroy the widgets, you * must call g_list_foreach (result, * (GFunc)g_object_ref, NULL) first, and then unref all the * widgets afterwards. * Return value: the list of mnemonic labels; free this list * with g_list_free() when you are done with it. * * Since: 2.4 **/ GList * gtk_widget_list_mnemonic_labels (GtkWidget *widget) { GList *list = NULL; GSList *l; g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); for (l = g_object_get_qdata (G_OBJECT (widget), quark_mnemonic_labels); l; l = l->next) list = g_list_prepend (list, l->data); return list; } /** * gtk_widget_add_mnemonic_label: * @widget: a #GtkWidget * @label: a #GtkWidget that acts as a mnemonic label for @widget. * * Adds a widget to the list of mnemonic labels for * this widget. (See gtk_widget_list_mnemonic_labels()). Note the * list of mnemonic labels for the widget is cleared when the * widget is destroyed, so the caller must make sure to update * its internal state at this point as well, by using a connection * to the ::destroy signal or a weak notifier. * * Since: 2.4 **/ void gtk_widget_add_mnemonic_label (GtkWidget *widget, GtkWidget *label) { GSList *old_list, *new_list; g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (GTK_IS_WIDGET (label)); old_list = g_object_steal_qdata (G_OBJECT (widget), quark_mnemonic_labels); new_list = g_slist_prepend (old_list, label); g_object_set_qdata_full (G_OBJECT (widget), quark_mnemonic_labels, new_list, (GDestroyNotify) g_slist_free); } /** * gtk_widget_remove_mnemonic_label: * @widget: a #GtkWidget * @label: a #GtkWidget that was previously set as a mnemnic label for * @widget with gtk_widget_add_mnemonic_label(). * * Removes a widget from the list of mnemonic labels for * this widget. (See gtk_widget_list_mnemonic_labels()). The widget * must have previously been added to the list with * gtk_widget_add_mnemonic_label(). * * Since: 2.4 **/ void gtk_widget_remove_mnemonic_label (GtkWidget *widget, GtkWidget *label) { GSList *old_list, *new_list; g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (GTK_IS_WIDGET (label)); old_list = g_object_steal_qdata (G_OBJECT (widget), quark_mnemonic_labels); new_list = g_slist_remove (old_list, label); if (new_list) g_object_set_qdata_full (G_OBJECT (widget), quark_mnemonic_labels, new_list, (GDestroyNotify) g_slist_free); } /** * gtk_widget_get_no_show_all: * @widget: a #GtkWidget * * Returns the current value of the "no_show_all" property, which determines * whether calls to gtk_widget_show_all() and gtk_widget_hide_all() * will affect this widget. * * Return value: the current value of the "no_show_all" property. * * Since: 2.4 **/ gboolean gtk_widget_get_no_show_all (GtkWidget *widget) { g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE); return (GTK_WIDGET_FLAGS (widget) & GTK_NO_SHOW_ALL) != 0; } /** * gtk_widget_set_no_show_all: * @widget: a #GtkWidget * @no_show_all: the new value for the "no_show_all" property * * Sets the "no_show_all" property, which determines whether calls to * gtk_widget_show_all() and gtk_widget_hide_all() will affect this widget. * * This is mostly for use in constructing widget hierarchies with externally * controlled visibility, see #GtkUIManager. * * Since: 2.4 **/ void gtk_widget_set_no_show_all (GtkWidget *widget, gboolean no_show_all) { g_return_if_fail (GTK_IS_WIDGET (widget)); no_show_all = (no_show_all != FALSE); if (no_show_all == ((GTK_WIDGET_FLAGS (widget) & GTK_NO_SHOW_ALL) != 0)) return; if (no_show_all) GTK_WIDGET_SET_FLAGS (widget, GTK_NO_SHOW_ALL); else GTK_WIDGET_UNSET_FLAGS (widget, GTK_NO_SHOW_ALL); g_object_notify (G_OBJECT (widget), "no-show-all"); } #define __GTK_WIDGET_C__ #include "gtkaliasdef.c"