/* 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 "gtkcontainer.h" #include "gtkprivate.h" #include "gtksignal.h" #include "gtkmain.h" #include "gtkwindow.h" #include "gtkintl.h" #include #include enum { ADD, REMOVE, CHECK_RESIZE, SET_FOCUS_CHILD, LAST_SIGNAL }; enum { PROP_0, PROP_BORDER_WIDTH, PROP_RESIZE_MODE, PROP_CHILD, }; #define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id) #define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id)) /* --- prototypes --- */ static void gtk_container_base_class_init (GtkContainerClass *klass); static void gtk_container_base_class_finalize (GtkContainerClass *klass); static void gtk_container_class_init (GtkContainerClass *klass); static void gtk_container_init (GtkContainer *container); static void gtk_container_destroy (GtkObject *object); static void gtk_container_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_container_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_container_add_unimplemented (GtkContainer *container, GtkWidget *widget); static void gtk_container_remove_unimplemented (GtkContainer *container, GtkWidget *widget); static void gtk_container_real_check_resize (GtkContainer *container); static gboolean gtk_container_focus (GtkWidget *widget, GtkDirectionType direction); static void gtk_container_real_set_focus_child (GtkContainer *container, GtkWidget *widget); static GList * gtk_container_focus_sort (GtkContainer *container, GList *children, GtkDirectionType direction); static gboolean gtk_container_focus_move (GtkContainer *container, GList *children, GtkDirectionType direction); static void gtk_container_children_callback (GtkWidget *widget, gpointer client_data); static void gtk_container_show_all (GtkWidget *widget); static void gtk_container_hide_all (GtkWidget *widget); static gint gtk_container_expose (GtkWidget *widget, GdkEventExpose *event); static void gtk_container_map (GtkWidget *widget); static void gtk_container_unmap (GtkWidget *widget); static gchar* gtk_container_child_default_composite_name (GtkContainer *container, GtkWidget *child); /* --- variables --- */ static const gchar *vadjustment_key = "gtk-vadjustment"; static guint vadjustment_key_id = 0; static const gchar *hadjustment_key = "gtk-hadjustment"; static guint hadjustment_key_id = 0; static GSList *container_resize_queue = NULL; static guint container_signals[LAST_SIGNAL] = { 0 }; static GtkWidgetClass *parent_class = NULL; extern GParamSpecPool *_gtk_widget_child_property_pool; extern GObjectNotifyContext *_gtk_widget_child_property_notify_context; /* --- functions --- */ GtkType gtk_container_get_type (void) { static GtkType container_type = 0; if (!container_type) { static GTypeInfo container_info = { sizeof (GtkContainerClass), (GBaseInitFunc) gtk_container_base_class_init, (GBaseFinalizeFunc) gtk_container_base_class_finalize, (GClassInitFunc) gtk_container_class_init, NULL /* class_destroy */, NULL /* class_data */, sizeof (GtkContainer), 0 /* n_preallocs */, (GInstanceInitFunc) gtk_container_init, NULL, /* value_table */ }; container_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkContainer", &container_info, 0); } return container_type; } static void gtk_container_base_class_init (GtkContainerClass *class) { /* reset instance specifc class fields that don't get inherited */ class->set_child_property = NULL; class->get_child_property = NULL; } static void gtk_container_base_class_finalize (GtkContainerClass *class) { GList *list, *node; list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class)); for (node = list; node; node = node->next) { GParamSpec *pspec = node->data; g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec); PARAM_SPEC_SET_PARAM_ID (pspec, 0); g_param_spec_unref (pspec); } g_list_free (list); } static void gtk_container_class_init (GtkContainerClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GtkObjectClass *object_class = GTK_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); parent_class = g_type_class_peek_parent (class); vadjustment_key_id = g_quark_from_static_string (vadjustment_key); hadjustment_key_id = g_quark_from_static_string (hadjustment_key); gobject_class->set_property = gtk_container_set_property; gobject_class->get_property = gtk_container_get_property; object_class->destroy = gtk_container_destroy; widget_class->show_all = gtk_container_show_all; widget_class->hide_all = gtk_container_hide_all; widget_class->expose_event = gtk_container_expose; widget_class->map = gtk_container_map; widget_class->unmap = gtk_container_unmap; widget_class->focus = gtk_container_focus; class->add = gtk_container_add_unimplemented; class->remove = gtk_container_remove_unimplemented; class->check_resize = gtk_container_real_check_resize; class->forall = NULL; class->set_focus_child = gtk_container_real_set_focus_child; class->child_type = NULL; class->composite_name = gtk_container_child_default_composite_name; g_object_class_install_property (gobject_class, PROP_RESIZE_MODE, g_param_spec_enum ("resize_mode", _("Resize mode"), _("Specify how resize events are handled"), GTK_TYPE_RESIZE_MODE, GTK_RESIZE_PARENT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_BORDER_WIDTH, g_param_spec_uint ("border_width", _("Border width"), _("The width of the empty border outside the containers children."), 0, G_MAXINT, 0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CHILD, g_param_spec_object ("child", _("Child"), _("Can be used to add a new child to the container."), GTK_TYPE_WIDGET, G_PARAM_WRITABLE)); container_signals[ADD] = gtk_signal_new ("add", GTK_RUN_FIRST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkContainerClass, add), gtk_marshal_VOID__OBJECT, GTK_TYPE_NONE, 1, GTK_TYPE_WIDGET); container_signals[REMOVE] = gtk_signal_new ("remove", GTK_RUN_FIRST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkContainerClass, remove), gtk_marshal_VOID__OBJECT, GTK_TYPE_NONE, 1, GTK_TYPE_WIDGET); container_signals[CHECK_RESIZE] = gtk_signal_new ("check_resize", GTK_RUN_LAST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkContainerClass, check_resize), gtk_marshal_VOID__VOID, GTK_TYPE_NONE, 0); container_signals[SET_FOCUS_CHILD] = gtk_signal_new ("set-focus-child", GTK_RUN_FIRST, GTK_CLASS_TYPE (object_class), GTK_SIGNAL_OFFSET (GtkContainerClass, set_focus_child), gtk_marshal_VOID__OBJECT, GTK_TYPE_NONE, 1, GTK_TYPE_WIDGET); } GtkType gtk_container_child_type (GtkContainer *container) { GtkType slot; GtkContainerClass *class; g_return_val_if_fail (GTK_IS_CONTAINER (container), 0); class = GTK_CONTAINER_GET_CLASS (container); if (class->child_type) slot = class->child_type (container); else slot = GTK_TYPE_NONE; return slot; } /* --- GtkContainer child property mechanism --- */ static inline void container_get_child_property (GtkContainer *container, GtkWidget *child, GParamSpec *pspec, GValue *value) { GtkContainerClass *class = g_type_class_peek (pspec->owner_type); class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec); } static inline void container_set_child_property (GtkContainer *container, GtkWidget *child, GParamSpec *pspec, const GValue *value, GObjectNotifyQueue *nqueue) { GValue tmp_value = { 0, }; GtkContainerClass *class = g_type_class_peek (pspec->owner_type); /* provide a copy to work from, convert (if necessary) and validate */ g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec)); if (!g_value_transform (value, &tmp_value)) g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'", pspec->name, g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)), G_VALUE_TYPE_NAME (value)); else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION)) { gchar *contents = g_strdup_value_contents (value); g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'", contents, G_VALUE_TYPE_NAME (value), pspec->name, g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec))); g_free (contents); } else { class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec); g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec); } g_value_unset (&tmp_value); } void gtk_container_child_get_valist (GtkContainer *container, GtkWidget *child, const gchar *first_property_name, va_list var_args) { const gchar *name; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); g_object_ref (container); g_object_ref (child); name = first_property_name; while (name) { GValue value = { 0, }; GParamSpec *pspec; gchar *error; pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, name, G_OBJECT_TYPE (container), TRUE); if (!pspec) { g_warning ("%s: container class `%s' has no child property named `%s'", G_STRLOC, G_OBJECT_TYPE_NAME (container), name); break; } if (!(pspec->flags & G_PARAM_READABLE)) { g_warning ("%s: child property `%s' of container class `%s' is not readable", G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container)); break; } g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec)); container_get_child_property (container, child, pspec, &value); G_VALUE_LCOPY (&value, var_args, 0, &error); if (error) { g_warning ("%s: %s", G_STRLOC, error); g_free (error); g_value_unset (&value); break; } g_value_unset (&value); name = va_arg (var_args, gchar*); } g_object_unref (child); g_object_unref (container); } void gtk_container_child_get_property (GtkContainer *container, GtkWidget *child, const gchar *property_name, GValue *value) { GParamSpec *pspec; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); g_return_if_fail (property_name != NULL); g_return_if_fail (G_IS_VALUE (value)); g_object_ref (container); g_object_ref (child); pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name, G_OBJECT_TYPE (container), TRUE); if (!pspec) g_warning ("%s: container class `%s' has no child property named `%s'", G_STRLOC, G_OBJECT_TYPE_NAME (container), property_name); else if (!(pspec->flags & G_PARAM_READABLE)) g_warning ("%s: child property `%s' of container class `%s' is not readable", G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container)); else { GValue *prop_value, tmp_value = { 0, }; /* auto-conversion of the callers value type */ if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec)) { g_value_reset (value); prop_value = value; } else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value))) { g_warning ("can't retrieve child 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 (child); g_object_unref (container); return; } else { g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec)); prop_value = &tmp_value; } container_get_child_property (container, child, pspec, prop_value); if (prop_value != value) { g_value_transform (prop_value, value); g_value_unset (&tmp_value); } } g_object_unref (child); g_object_unref (container); } void gtk_container_child_set_valist (GtkContainer *container, GtkWidget *child, const gchar *first_property_name, va_list var_args) { GObject *object; GObjectNotifyQueue *nqueue; const gchar *name; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); g_object_ref (container); g_object_ref (child); object = G_OBJECT (container); nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context); name = first_property_name; while (name) { GValue value = { 0, }; gchar *error = NULL; GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, name, G_OBJECT_TYPE (container), TRUE); if (!pspec) { g_warning ("%s: container class `%s' has no child property named `%s'", G_STRLOC, G_OBJECT_TYPE_NAME (container), name); break; } if (!(pspec->flags & G_PARAM_WRITABLE)) { g_warning ("%s: child property `%s' of container class `%s' is not writable", G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container)); break; } g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec)); G_VALUE_COLLECT (&value, var_args, 0, &error); if (error) { g_warning ("%s: %s", G_STRLOC, error); g_free (error); /* we purposely leak the value here, it might not be * in a sane state if an error condition occoured */ break; } container_set_child_property (container, child, pspec, &value, nqueue); g_value_unset (&value); name = va_arg (var_args, gchar*); } g_object_notify_queue_thaw (G_OBJECT (child), nqueue); g_object_unref (container); g_object_unref (child); } void gtk_container_child_set_property (GtkContainer *container, GtkWidget *child, const gchar *property_name, const GValue *value) { GObject *object; GObjectNotifyQueue *nqueue; GParamSpec *pspec; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); g_return_if_fail (property_name != NULL); g_return_if_fail (G_IS_VALUE (value)); g_object_ref (container); g_object_ref (child); object = G_OBJECT (container); nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context); pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name, G_OBJECT_TYPE (container), TRUE); if (!pspec) g_warning ("%s: container class `%s' has no child property named `%s'", G_STRLOC, G_OBJECT_TYPE_NAME (container), property_name); else if (!(pspec->flags & G_PARAM_WRITABLE)) g_warning ("%s: child property `%s' of container class `%s' is not writable", G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (container)); else { container_set_child_property (container, child, pspec, value, nqueue); } g_object_notify_queue_thaw (G_OBJECT (child), nqueue); g_object_unref (container); g_object_unref (child); } void gtk_container_add_with_properties (GtkContainer *container, GtkWidget *widget, const gchar *first_prop_name, ...) { g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (widget->parent == NULL); gtk_widget_ref (GTK_WIDGET (container)); gtk_widget_ref (widget); gtk_widget_freeze_child_notify (widget); gtk_signal_emit (GTK_OBJECT (container), container_signals[ADD], widget); if (widget->parent) { va_list var_args; va_start (var_args, first_prop_name); gtk_container_child_set_valist (container, widget, first_prop_name, var_args); va_end (var_args); } gtk_widget_thaw_child_notify (widget); gtk_widget_unref (widget); gtk_widget_unref (GTK_WIDGET (container)); } void gtk_container_child_set (GtkContainer *container, GtkWidget *child, const gchar *first_prop_name, ...) { va_list var_args; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); va_start (var_args, first_prop_name); gtk_container_child_set_valist (container, child, first_prop_name, var_args); va_end (var_args); } void gtk_container_child_get (GtkContainer *container, GtkWidget *child, const gchar *first_prop_name, ...) { va_list var_args; g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (child != NULL); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (container)); va_start (var_args, first_prop_name); gtk_container_child_get_valist (container, child, first_prop_name, var_args); va_end (var_args); } void gtk_container_class_install_child_property (GtkContainerClass *class, guint property_id, GParamSpec *pspec) { g_return_if_fail (GTK_IS_CONTAINER_CLASS (class)); g_return_if_fail (G_IS_PARAM_SPEC (pspec)); if (pspec->flags & G_PARAM_WRITABLE) g_return_if_fail (class->set_child_property != NULL); if (pspec->flags & G_PARAM_READABLE) g_return_if_fail (class->get_child_property != NULL); g_return_if_fail (property_id > 0); g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */ if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0); if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (class), FALSE)) { g_warning (G_STRLOC ": class `%s' already contains a property named `%s'", G_OBJECT_CLASS_NAME (class), pspec->name); return; } g_param_spec_ref (pspec); g_param_spec_sink (pspec); PARAM_SPEC_SET_PARAM_ID (pspec, property_id); g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (class)); } GParamSpec* gtk_container_class_find_child_property (GObjectClass *class, const gchar *property_name) { g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (class), NULL); g_return_val_if_fail (property_name != NULL, NULL); return g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name, G_OBJECT_CLASS_TYPE (class), TRUE); } GParamSpec** /* free result */ gtk_container_class_list_child_properties (GObjectClass *class, guint *n_properties) { GParamSpec **pspecs; guint n; g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (class), NULL); pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class), &n); if (n_properties) *n_properties = n; return pspecs; } static void gtk_container_add_unimplemented (GtkContainer *container, GtkWidget *widget) { g_warning ("GtkContainerClass::add not implemented for `%s'", gtk_type_name (GTK_OBJECT_TYPE (container))); } static void gtk_container_remove_unimplemented (GtkContainer *container, GtkWidget *widget) { g_warning ("GtkContainerClass::remove not implemented for `%s'", gtk_type_name (GTK_OBJECT_TYPE (container))); } static void gtk_container_init (GtkContainer *container) { container->focus_child = NULL; container->border_width = 0; container->need_resize = FALSE; container->resize_mode = GTK_RESIZE_PARENT; container->reallocate_redraws = FALSE; } static void gtk_container_destroy (GtkObject *object) { GtkContainer *container; g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_CONTAINER (object)); container = GTK_CONTAINER (object); if (GTK_CONTAINER_RESIZE_PENDING (container)) _gtk_container_dequeue_resize_handler (container); /* do this before walking child widgets, to avoid * removing children from focus chain one by one. */ if (container->has_focus_chain) gtk_container_unset_focus_chain (container); gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL); if (GTK_OBJECT_CLASS (parent_class)->destroy) (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); } static void gtk_container_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkContainer *container; container = GTK_CONTAINER (object); switch (prop_id) { case PROP_BORDER_WIDTH: gtk_container_set_border_width (container, g_value_get_uint (value)); break; case PROP_RESIZE_MODE: gtk_container_set_resize_mode (container, g_value_get_enum (value)); break; case PROP_CHILD: gtk_container_add (container, GTK_WIDGET (g_value_get_object (value))); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_container_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkContainer *container; container = GTK_CONTAINER (object); switch (prop_id) { case PROP_BORDER_WIDTH: g_value_set_uint (value, container->border_width); break; case PROP_RESIZE_MODE: g_value_set_enum (value, container->resize_mode); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /** * gtk_container_set_border_width: * @container: a #GtkContainer * @border_width: amount of blank space to leave outside the container. * Valid values are in the range 0-65535 pixels. * * The border width of a container is the amount of space to leave * around the outside of the container. The only exception to this is * #GtkWindow; because toplevel windows can't leave space outside, * they leave the space inside. The border is added on all sides of * the container. To add space to only one side, one approach is to * create a #GtkAlignment widget, call gtk_widget_set_usize() to give * it a size, and place it on the side of the container as a spacer. **/ void gtk_container_set_border_width (GtkContainer *container, guint border_width) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (container->border_width != border_width) { container->border_width = border_width; g_object_notify (G_OBJECT (container), "border_width"); if (GTK_WIDGET_REALIZED (container)) gtk_widget_queue_resize (GTK_WIDGET (container)); } } /** * gtk_container_get_border_width: * @container: a #GtkContainer * * Retrieves the border width of the container. See * gtk_container_set_border_width(). * * Return value: the current border width **/ guint gtk_container_get_border_width (GtkContainer *container) { g_return_val_if_fail (GTK_IS_CONTAINER (container), 0); return container->border_width; } /** * gtk_container_add: * @container: a #GtkContainer * @widget: a widget to be placed inside @container * * Adds @widget to @container. Typically used for simple containers * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated * layout containers such as #GtkBox or #GtkTable, this function will * pick default packing parameters that may not be correct. So * consider functions such as gtk_box_pack_start() and * gtk_table_attach() as an alternative to gtk_container_add() in * those cases. A widget may be added to only one container at a time; * you can't place the same widget inside two different containers. **/ void gtk_container_add (GtkContainer *container, GtkWidget *widget) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_WIDGET (widget)); if (widget->parent != NULL) { g_warning ("Attempting to add a widget with type %s to a container of " "type %s, but the widget is already inside a container of type %s, " "the GTK+ FAQ at http://www.gtk.org/faq/ explains how to reparent a widget.", g_type_name (G_OBJECT_TYPE (widget)), g_type_name (G_OBJECT_TYPE (container)), g_type_name (G_OBJECT_TYPE (widget->parent))); return; } gtk_signal_emit (GTK_OBJECT (container), container_signals[ADD], widget); } /** * gtk_container_remove: * @container: a #GtkContainer * @widget: a current child of @container * * Removes @widget from @container. @widget must be inside @container. * Note that @container will own a reference to @widget, and that this * may be the last reference held; so removing a widget from its * container can destroy that widget. If you want to use @widget * again, you need to add a reference to it while it's not inside * a container, using g_object_ref(). **/ void gtk_container_remove (GtkContainer *container, GtkWidget *widget) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (widget->parent == GTK_WIDGET (container)); gtk_signal_emit (GTK_OBJECT (container), container_signals[REMOVE], widget); } void _gtk_container_dequeue_resize_handler (GtkContainer *container) { g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_CONTAINER_RESIZE_PENDING (container)); container_resize_queue = g_slist_remove (container_resize_queue, container); GTK_PRIVATE_UNSET_FLAG (container, GTK_RESIZE_PENDING); } void gtk_container_set_resize_mode (GtkContainer *container, GtkResizeMode resize_mode) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE); if (GTK_WIDGET_TOPLEVEL (container) && resize_mode == GTK_RESIZE_PARENT) { resize_mode = GTK_RESIZE_QUEUE; g_object_notify (G_OBJECT (container), "resize_mode"); } if (container->resize_mode != resize_mode) { container->resize_mode = resize_mode; gtk_widget_queue_resize (GTK_WIDGET (container)); g_object_notify (G_OBJECT (container), "resize_mode"); } } /** * gtk_container_get_resize_mode: * @container: a #GtkContainer * * Returns the resize mode for the container. See * gtk_container_set_resize_mode (). * * Return value: the current resize mode **/ GtkResizeMode gtk_container_get_resize_mode (GtkContainer *container) { g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT); return container->resize_mode; } void gtk_container_set_reallocate_redraws (GtkContainer *container, gboolean needs_redraws) { g_return_if_fail (GTK_IS_CONTAINER (container)); container->reallocate_redraws = needs_redraws ? TRUE : FALSE; } static GtkContainer* gtk_container_get_resize_container (GtkContainer *container) { GtkWidget *widget; widget = GTK_WIDGET (container); while (widget->parent) { widget = widget->parent; if (GTK_IS_RESIZE_CONTAINER (widget)) break; } return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL; } static gboolean gtk_container_idle_sizer (gpointer data) { GDK_THREADS_ENTER (); /* we may be invoked with a container_resize_queue of NULL, because * queue_resize could have been adding an extra idle function while * the queue still got processed. we better just ignore such case * than trying to explicitely work around them with some extra flags, * since it doesn't cause any actual harm. */ while (container_resize_queue) { GSList *slist; GtkWidget *widget; slist = container_resize_queue; container_resize_queue = slist->next; widget = slist->data; g_slist_free_1 (slist); GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_PENDING); gtk_container_check_resize (GTK_CONTAINER (widget)); } gdk_window_process_all_updates (); GDK_THREADS_LEAVE (); return FALSE; } void _gtk_container_queue_resize (GtkContainer *container) { GtkContainer *resize_container; g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); resize_container = gtk_container_get_resize_container (container); if (resize_container) { GtkWidget *widget = GTK_WIDGET (container); while (!GTK_WIDGET_ALLOC_NEEDED (widget) || !GTK_WIDGET_REQUEST_NEEDED (widget)) { GTK_PRIVATE_SET_FLAG (widget, GTK_ALLOC_NEEDED); GTK_PRIVATE_SET_FLAG (widget, GTK_REQUEST_NEEDED); if (widget == GTK_WIDGET (resize_container)) break; widget = widget->parent; } if (GTK_WIDGET_VISIBLE (resize_container) && (GTK_WIDGET_TOPLEVEL (resize_container) || GTK_WIDGET_DRAWABLE (resize_container))) { switch (resize_container->resize_mode) { case GTK_RESIZE_QUEUE: if (!GTK_CONTAINER_RESIZE_PENDING (resize_container)) { GTK_PRIVATE_SET_FLAG (resize_container, GTK_RESIZE_PENDING); if (container_resize_queue == NULL) gtk_idle_add_priority (GTK_PRIORITY_RESIZE, gtk_container_idle_sizer, NULL); container_resize_queue = g_slist_prepend (container_resize_queue, resize_container); } break; case GTK_RESIZE_IMMEDIATE: gtk_container_check_resize (resize_container); break; case GTK_RESIZE_PARENT: /* Ignore, should not be reached */ break; } } else { /* we need to let hidden resize containers know that something * changed while they where hidden (currently only evaluated by * toplevels). */ resize_container->need_resize = TRUE; } } } void gtk_container_check_resize (GtkContainer *container) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); gtk_signal_emit (GTK_OBJECT (container), container_signals[CHECK_RESIZE]); } static void gtk_container_real_check_resize (GtkContainer *container) { GtkWidget *widget; GtkRequisition requisition; g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); widget = GTK_WIDGET (container); gtk_widget_size_request (widget, &requisition); if (requisition.width > widget->allocation.width || requisition.height > widget->allocation.height) { if (GTK_IS_RESIZE_CONTAINER (container)) gtk_widget_size_allocate (GTK_WIDGET (container), >K_WIDGET (container)->allocation); else gtk_widget_queue_resize (widget); } else { gtk_container_resize_children (container); } } /* The container hasn't changed size but one of its children * queued a resize request. Which means that the allocation * is not sufficient for the requisition of some child. * We've already performed a size request at this point, * so we simply need to reallocate and let the allocation * trickle down via GTK_WIDGET_ALLOC_NEEDED flags. */ void gtk_container_resize_children (GtkContainer *container) { GtkWidget *widget; /* resizing invariants: * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set. * containers that have an idle sizer pending must be flagged with * RESIZE_PENDING. */ g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); widget = GTK_WIDGET (container); gtk_widget_size_allocate (widget, &widget->allocation); } /** * gtk_container_forall: * @container: a #GtkContainer * @callback: a callback * @callback_data: callback user data * * Invokes @callback on each child of @container, including children * that are considered "internal" (implementation details of the * container). "Internal" children generally weren't added by the user * of the container, but were added by the container implementation * itself. Most applications should use gtk_container_foreach(), * rather than gtk_container_forall(). **/ void gtk_container_forall (GtkContainer *container, GtkCallback callback, gpointer callback_data) { GtkContainerClass *class; g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (callback != NULL); class = GTK_CONTAINER_GET_CLASS (container); if (class->forall) class->forall (container, TRUE, callback, callback_data); } /** * gtk_container_foreach: * @container: a #GtkContainer * @callback: a callback * @callback_data: callback user data * * Invokes @callback on each non-internal child of @container. See * gtk_container_forall() for details on what constitutes an * "internal" child. Most applications should use * gtk_container_foreach(), rather than gtk_container_forall(). **/ void gtk_container_foreach (GtkContainer *container, GtkCallback callback, gpointer callback_data) { GtkContainerClass *class; g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (callback != NULL); class = GTK_CONTAINER_GET_CLASS (container); if (class->forall) class->forall (container, FALSE, callback, callback_data); } typedef struct _GtkForeachData GtkForeachData; struct _GtkForeachData { GtkObject *container; GtkCallbackMarshal callback; gpointer callback_data; }; static void gtk_container_foreach_unmarshal (GtkWidget *child, gpointer data) { GtkForeachData *fdata = (GtkForeachData*) data; GtkArg args[2]; /* first argument */ args[0].name = NULL; args[0].type = GTK_OBJECT_TYPE (child); GTK_VALUE_OBJECT (args[0]) = GTK_OBJECT (child); /* location for return value */ args[1].name = NULL; args[1].type = GTK_TYPE_NONE; fdata->callback (fdata->container, fdata->callback_data, 1, args); } void gtk_container_foreach_full (GtkContainer *container, GtkCallback callback, GtkCallbackMarshal marshal, gpointer callback_data, GtkDestroyNotify notify) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (marshal) { GtkForeachData fdata; fdata.container = GTK_OBJECT (container); fdata.callback = marshal; fdata.callback_data = callback_data; gtk_container_foreach (container, gtk_container_foreach_unmarshal, &fdata); } else { g_return_if_fail (callback != NULL); gtk_container_foreach (container, callback, &callback_data); } if (notify) notify (callback_data); } void gtk_container_set_focus_child (GtkContainer *container, GtkWidget *widget) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (widget) g_return_if_fail (GTK_IS_WIDGET (widget)); gtk_signal_emit (GTK_OBJECT (container), container_signals[SET_FOCUS_CHILD], widget); } GList* gtk_container_get_children (GtkContainer *container) { GList *children; children = NULL; gtk_container_foreach (container, gtk_container_children_callback, &children); return g_list_reverse (children); } static void gtk_container_child_position_callback (GtkWidget *widget, gpointer client_data) { struct { GtkWidget *child; guint i; guint index; } *data = client_data; data->i++; if (data->child == widget) data->index = data->i; } static gchar* gtk_container_child_default_composite_name (GtkContainer *container, GtkWidget *child) { struct { GtkWidget *child; guint i; guint index; } data; gchar *name; /* fallback implementation */ data.child = child; data.i = 0; data.index = 0; gtk_container_forall (container, gtk_container_child_position_callback, &data); name = g_strdup_printf ("%s-%u", gtk_type_name (GTK_OBJECT_TYPE (child)), data.index); return name; } gchar* _gtk_container_child_composite_name (GtkContainer *container, GtkWidget *child) { g_return_val_if_fail (container != NULL, NULL); g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL); g_return_val_if_fail (child != NULL, NULL); g_return_val_if_fail (GTK_IS_WIDGET (child), NULL); g_return_val_if_fail (child->parent == GTK_WIDGET (container), NULL); if (GTK_WIDGET_COMPOSITE_CHILD (child)) { static GQuark quark_composite_name = 0; gchar *name; if (!quark_composite_name) quark_composite_name = g_quark_from_static_string ("gtk-composite-name"); name = gtk_object_get_data_by_id (GTK_OBJECT (child), quark_composite_name); if (!name) { GtkContainerClass *class; class = GTK_CONTAINER_GET_CLASS (container); if (class->composite_name) name = class->composite_name (container, child); } else name = g_strdup (name); return name; } return NULL; } static void gtk_container_real_set_focus_child (GtkContainer *container, GtkWidget *child) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (child) g_return_if_fail (GTK_IS_WIDGET (child)); if (child != container->focus_child) { if (container->focus_child) gtk_widget_unref (container->focus_child); container->focus_child = child; if (container->focus_child) gtk_widget_ref (container->focus_child); } /* check for h/v adjustments */ if (container->focus_child) { GtkAdjustment *adjustment; adjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), vadjustment_key_id); if (adjustment) gtk_adjustment_clamp_page (adjustment, container->focus_child->allocation.y, (container->focus_child->allocation.y + container->focus_child->allocation.height)); adjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), hadjustment_key_id); if (adjustment) gtk_adjustment_clamp_page (adjustment, container->focus_child->allocation.x, (container->focus_child->allocation.x + container->focus_child->allocation.width)); } } static GList* get_focus_chain (GtkContainer *container) { return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain"); } static gboolean gtk_container_focus (GtkWidget *widget, GtkDirectionType direction) { GList *children; GList *sorted_children; gint return_val; GtkContainer *container; g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE); container = GTK_CONTAINER (widget); return_val = FALSE; if (GTK_WIDGET_CAN_FOCUS (container)) { if (!GTK_WIDGET_HAS_FOCUS (container)) { gtk_widget_grab_focus (GTK_WIDGET (container)); return_val = TRUE; } } else { /* Get a list of the containers children, allowing focus * chain to override. */ if (container->has_focus_chain) children = g_list_copy (get_focus_chain (container)); else children = gtk_container_get_children (container); if (container->has_focus_chain && (direction == GTK_DIR_TAB_FORWARD || direction == GTK_DIR_TAB_BACKWARD)) { sorted_children = g_list_copy (children); if (direction == GTK_DIR_TAB_BACKWARD) sorted_children = g_list_reverse (sorted_children); } else sorted_children = gtk_container_focus_sort (container, children, direction); return_val = gtk_container_focus_move (container, sorted_children, direction); g_list_free (sorted_children); g_list_free (children); } return return_val; } static gint tab_compare (gconstpointer a, gconstpointer b) { const GtkWidget *child1 = a; const GtkWidget *child2 = b; gint y1 = child1->allocation.y + child1->allocation.height / 2; gint y2 = child2->allocation.y + child2->allocation.height / 2; if (y1 == y2) { gint x1 = child1->allocation.x + child1->allocation.width / 2; gint x2 = child2->allocation.x + child2->allocation.width / 2; return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1); } else return (y1 < y2) ? -1 : 1; } static GList * gtk_container_focus_sort_tab (GtkContainer *container, GList *children, GtkDirectionType direction) { children = g_list_sort (children, tab_compare); /* if we are going backwards then reverse the order * of the children. */ if (direction == GTK_DIR_TAB_BACKWARD) children = g_list_reverse (children); return children; } /* Get coordinates of @widget's allocation with respect to * allocation of @container. */ static gboolean get_allocation_coords (GtkContainer *container, GtkWidget *widget, GdkRectangle *allocation) { *allocation = widget->allocation; return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container), 0, 0, &allocation->x, &allocation->y); } /* Look for a child in @children that is intermediate between * the focus widget and container. This widget, if it exists, * acts as the starting widget for focus navigation. */ static GtkWidget * find_old_focus (GtkContainer *container, GList *children) { GList *tmp_list = children; while (tmp_list) { GtkWidget *child = tmp_list->data; GtkWidget *widget = child; while (widget && widget != (GtkWidget *)container) { GtkWidget *parent = widget->parent; if (parent && ((GtkContainer *)parent)->focus_child != widget) goto next; widget = parent; } return child; next: tmp_list = tmp_list->next; } return NULL; } static gboolean old_focus_coords (GtkContainer *container, GdkRectangle *old_focus_rect) { GtkWidget *widget = GTK_WIDGET (container); GtkWidget *toplevel = gtk_widget_get_toplevel (widget); if (toplevel && GTK_IS_WINDOW (toplevel) && GTK_WINDOW (toplevel)->focus_widget) { GtkWidget *old_focus = GTK_WINDOW (toplevel)->focus_widget; return get_allocation_coords (container, old_focus, old_focus_rect); } else return FALSE; } typedef struct _CompareInfo CompareInfo; struct _CompareInfo { GtkContainer *container; gint x; gint y; gboolean reverse; }; static gint up_down_compare (gconstpointer a, gconstpointer b, gpointer data) { GdkRectangle allocation1; GdkRectangle allocation2; CompareInfo *compare = data; gint y1, y2; get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1); get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2); y1 = allocation1.y + allocation1.height / 2; y2 = allocation2.y + allocation2.height / 2; if (y1 == y2) { gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x); gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x); if (compare->reverse) return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1); else return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1); } else return (y1 < y2) ? -1 : 1; } static GList * gtk_container_focus_sort_up_down (GtkContainer *container, GList *children, GtkDirectionType direction) { CompareInfo compare; GList *tmp_list; GtkWidget *old_focus; compare.container = container; compare.reverse = (direction == GTK_DIR_UP); old_focus = find_old_focus (container, children); if (old_focus) { GdkRectangle old_allocation; gint compare_x1; gint compare_x2; gint compare_y; /* Delete widgets from list that don't match minimum criteria */ get_allocation_coords (container, old_focus, &old_allocation); compare_x1 = old_allocation.x; compare_x2 = old_allocation.x + old_allocation.width; if (direction == GTK_DIR_UP) compare_y = old_allocation.y; else compare_y = old_allocation.y + old_allocation.height; tmp_list = children; while (tmp_list) { GtkWidget *child = tmp_list->data; GList *next = tmp_list->next; gint child_x1, child_x2; GdkRectangle child_allocation; if (child != old_focus) { get_allocation_coords (container, child, &child_allocation); child_x1 = child_allocation.x; child_x2 = child_allocation.x + child_allocation.width; if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ || (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */ (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */ { children = g_list_delete_link (children, tmp_list); } } tmp_list = next; } compare.x = (compare_x1 + compare_x2) / 2; compare.y = old_allocation.y + old_allocation.height / 2; } else { /* No old focus widget, need to figure out starting x,y some other way */ GtkWidget *widget = GTK_WIDGET (container); GdkRectangle old_focus_rect; if (old_focus_coords (container, &old_focus_rect)) { compare.x = old_focus_rect.x + old_focus_rect.width / 2; } else { if (GTK_WIDGET_NO_WINDOW (widget)) compare.x = widget->allocation.x + widget->allocation.width / 2; else compare.x = widget->allocation.width / 2; } if (GTK_WIDGET_NO_WINDOW (widget)) compare.y = (direction == GTK_DIR_DOWN) ? widget->allocation.y : widget->allocation.y + widget->allocation.height; else compare.y = (direction == GTK_DIR_DOWN) ? 0 : + widget->allocation.height; } children = g_list_sort_with_data (children, up_down_compare, &compare); if (compare.reverse) children = g_list_reverse (children); return children; } static gint left_right_compare (gconstpointer a, gconstpointer b, gpointer data) { GdkRectangle allocation1; GdkRectangle allocation2; CompareInfo *compare = data; gint x1, x2; get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1); get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2); x1 = allocation1.x + allocation1.width / 2; x2 = allocation2.x + allocation2.width / 2; if (x1 == x2) { gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y); gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y); if (compare->reverse) return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1); else return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1); } else return (x1 < x2) ? -1 : 1; } static GList * gtk_container_focus_sort_left_right (GtkContainer *container, GList *children, GtkDirectionType direction) { CompareInfo compare; GList *tmp_list; GtkWidget *old_focus; compare.container = container; compare.reverse = (direction == GTK_DIR_LEFT); old_focus = find_old_focus (container, children); if (old_focus) { GdkRectangle old_allocation; gint compare_y1; gint compare_y2; gint compare_x; /* Delete widgets from list that don't match minimum criteria */ get_allocation_coords (container, old_focus, &old_allocation); compare_y1 = old_allocation.y; compare_y2 = old_allocation.y + old_allocation.height; if (direction == GTK_DIR_LEFT) compare_x = old_allocation.x; else compare_x = old_allocation.x + old_allocation.width; tmp_list = children; while (tmp_list) { GtkWidget *child = tmp_list->data; GList *next = tmp_list->next; gint child_y1, child_y2; GdkRectangle child_allocation; if (child != old_focus) { get_allocation_coords (container, child, &child_allocation); child_y1 = child_allocation.y; child_y2 = child_allocation.y + child_allocation.height; if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ || (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */ (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */ { children = g_list_delete_link (children, tmp_list); } } tmp_list = next; } compare.y = (compare_y1 + compare_y2) / 2; compare.x = old_allocation.x + old_allocation.width / 2; } else { /* No old focus widget, need to figure out starting x,y some other way */ GtkWidget *widget = GTK_WIDGET (container); GdkRectangle old_focus_rect; if (old_focus_coords (container, &old_focus_rect)) { compare.y = old_focus_rect.y + old_focus_rect.height / 2; } else { if (GTK_WIDGET_NO_WINDOW (widget)) compare.y = widget->allocation.y + widget->allocation.height / 2; else compare.y = widget->allocation.height / 2; } if (GTK_WIDGET_NO_WINDOW (widget)) compare.x = (direction == GTK_DIR_RIGHT) ? widget->allocation.x : widget->allocation.x + widget->allocation.width; else compare.x = (direction == GTK_DIR_RIGHT) ? 0 : widget->allocation.width; } children = g_list_sort_with_data (children, left_right_compare, &compare); if (compare.reverse) children = g_list_reverse (children); return children; } /** * gtk_container_focus_sort: * @container: a #GtkContainer * @children: a list of descendents of @container (they don't * have to be direct children. * @direction: focus direction * * Sorts @children in the correct order for focusing with * direction type @direction. * * Return value: a copy of @children, sorted in correct focusing order, * with children that aren't suitable for focusing in this direction * removed. **/ static GList * gtk_container_focus_sort (GtkContainer *container, GList *children, GtkDirectionType direction) { children = g_list_copy (children); switch (direction) { case GTK_DIR_TAB_FORWARD: case GTK_DIR_TAB_BACKWARD: return gtk_container_focus_sort_tab (container, children, direction); case GTK_DIR_UP: case GTK_DIR_DOWN: return gtk_container_focus_sort_up_down (container, children, direction); case GTK_DIR_LEFT: case GTK_DIR_RIGHT: return gtk_container_focus_sort_left_right (container, children, direction); } g_assert_not_reached (); return NULL; } static gboolean gtk_container_focus_move (GtkContainer *container, GList *children, GtkDirectionType direction) { GtkWidget *focus_child; GtkWidget *child; focus_child = container->focus_child; while (children) { child = children->data; children = children->next; if (!child) continue; if (focus_child) { if (focus_child == child) { focus_child = NULL; if (gtk_widget_child_focus (child, direction)) return TRUE; } } else if (GTK_WIDGET_DRAWABLE (child) && gtk_widget_is_ancestor (child, GTK_WIDGET (container))) { if (gtk_widget_child_focus (child, direction)) return TRUE; } } return FALSE; } static void gtk_container_children_callback (GtkWidget *widget, gpointer client_data) { GList **children; children = (GList**) client_data; *children = g_list_prepend (*children, widget); } static void chain_widget_destroyed (GtkWidget *widget, gpointer user_data) { GtkContainer *container; GList *chain; container = GTK_CONTAINER (user_data); chain = g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain"); chain = g_list_remove (chain, widget); g_signal_handlers_disconnect_by_func (G_OBJECT (widget), chain_widget_destroyed, user_data); g_object_set_data (G_OBJECT (container), "gtk-container-focus-chain", chain); } void gtk_container_set_focus_chain (GtkContainer *container, GList *focusable_widgets) { GList *chain; GList *tmp_list; g_return_if_fail (GTK_IS_CONTAINER (container)); if (container->has_focus_chain) gtk_container_unset_focus_chain (container); container->has_focus_chain = TRUE; chain = NULL; tmp_list = focusable_widgets; while (tmp_list != NULL) { g_return_if_fail (GTK_IS_WIDGET (tmp_list->data)); /* In principle each widget in the chain should be a descendant * of the container, but we don't want to check that here, it's * expensive and also it's allowed to set the focus chain before * you pack the widgets, or have a widget in the chain that isn't * always packed. So we check for ancestor during actual traversal. */ chain = g_list_prepend (chain, tmp_list->data); gtk_signal_connect (GTK_OBJECT (tmp_list->data), "destroy", GTK_SIGNAL_FUNC (chain_widget_destroyed), container); tmp_list = g_list_next (tmp_list); } chain = g_list_reverse (chain); g_object_set_data (G_OBJECT (container), "gtk-container-focus-chain", chain); } /** * gtk_container_get_focus_chain: * @container: a #GtkContainer * @focusable_widgets: location to store the focus chain of the * container, or %NULL. You should free this list * using g_list_free() when you are done with it, however * no additional reference count is added to the * individual widgets in the focus chain. * * Retrieve the focus chain of the container, if one has been * set explicitely. If no focus chain has been explicitely * set, GTK+ computes the focus chain based on the positions * of the children. In that case, GTK+ stores %NULL in * @focusable_widgets and returns %FALSE. * * Return value: %TRUE if the focus chain of the container, * has been set explicitely. **/ gboolean gtk_container_get_focus_chain (GtkContainer *container, GList **focus_chain) { g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE); if (focus_chain) { if (container->has_focus_chain) *focus_chain = g_list_copy (get_focus_chain (container)); else *focus_chain = NULL; } return container->has_focus_chain; } void gtk_container_unset_focus_chain (GtkContainer *container) { g_return_if_fail (GTK_IS_CONTAINER (container)); if (container->has_focus_chain) { GList *chain; GList *tmp_list; chain = get_focus_chain (container); container->has_focus_chain = FALSE; g_object_set_data (G_OBJECT (container), "gtk-container-focus-chain", NULL); tmp_list = chain; while (tmp_list != NULL) { g_signal_handlers_disconnect_by_func (G_OBJECT (tmp_list->data), chain_widget_destroyed, container); tmp_list = g_list_next (tmp_list); } g_list_free (chain); } } void gtk_container_set_focus_vadjustment (GtkContainer *container, GtkAdjustment *adjustment) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (adjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); if (adjustment) gtk_object_ref (GTK_OBJECT(adjustment)); gtk_object_set_data_by_id_full (GTK_OBJECT (container), vadjustment_key_id, adjustment, (GtkDestroyNotify) gtk_object_unref); } /** * gtk_container_get_focus_vadjustment: * @container: a #GtkContainer * * Retrieves the vertical focus adjustment for the container. See * gtk_container_set_focus_vadjustment (). * * Return value: the vertical focus adjustment, or %NULL if * none has been set. **/ GtkAdjustment * gtk_container_get_focus_vadjustment (GtkContainer *container) { GtkAdjustment *vadjustment; g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL); vadjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), vadjustment_key_id); return vadjustment; } void gtk_container_set_focus_hadjustment (GtkContainer *container, GtkAdjustment *adjustment) { g_return_if_fail (container != NULL); g_return_if_fail (GTK_IS_CONTAINER (container)); if (adjustment) g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); if (adjustment) gtk_object_ref (GTK_OBJECT (adjustment)); gtk_object_set_data_by_id_full (GTK_OBJECT (container), hadjustment_key_id, adjustment, (GtkDestroyNotify) gtk_object_unref); } /** * gtk_container_get_focus_hadjustment: * @container: a #GtkContainer * * Retrieves the horizontal focus adjustment for the container. See * gtk_container_set_focus_hadjustment (). * * Return value: the horizontal focus adjustment, or %NULL if none * none has been set. **/ GtkAdjustment * gtk_container_get_focus_hadjustment (GtkContainer *container) { GtkAdjustment *hadjustment; g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL); hadjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), hadjustment_key_id); return hadjustment; } static void gtk_container_show_all (GtkWidget *widget) { g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_CONTAINER (widget)); gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_show_all, NULL); gtk_widget_show (widget); } static void gtk_container_hide_all (GtkWidget *widget) { g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_CONTAINER (widget)); gtk_widget_hide (widget); gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) gtk_widget_hide_all, NULL); } static void gtk_container_expose_child (GtkWidget *child, gpointer client_data) { struct { GtkWidget *container; GdkEventExpose *event; } *data = client_data; gtk_container_propagate_expose (GTK_CONTAINER (data->container), child, data->event); } static gint gtk_container_expose (GtkWidget *widget, GdkEventExpose *event) { struct { GtkWidget *container; GdkEventExpose *event; } data; g_return_val_if_fail (widget != NULL, FALSE); g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); if (GTK_WIDGET_DRAWABLE (widget)) { data.container = widget; data.event = event; gtk_container_forall (GTK_CONTAINER (widget), gtk_container_expose_child, &data); } return TRUE; } static void gtk_container_map_child (GtkWidget *child, gpointer client_data) { if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_CHILD_VISIBLE (child) && !GTK_WIDGET_MAPPED (child)) gtk_widget_map (child); } static void gtk_container_map (GtkWidget *widget) { GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); gtk_container_forall (GTK_CONTAINER (widget), gtk_container_map_child, NULL); if (!GTK_WIDGET_NO_WINDOW (widget)) gdk_window_show (widget->window); } static void gtk_container_unmap (GtkWidget *widget) { GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED); if (!GTK_WIDGET_NO_WINDOW (widget)) gdk_window_hide (widget->window); else gtk_container_forall (GTK_CONTAINER (widget), (GtkCallback)gtk_widget_unmap, NULL); } /** * gtk_container_propagate_expose: * @container: a #GtkContainer * @child: a child of @container * @event: a expose event sent to container * * When a container receives an expose event, it must send synthetic * expose events to all children that don't have their own GdkWindows. * This function provides a convenient way of doing this. A container, * when it receives an expose event, gtk_container_propagate_expose() * once for each child, passing in the event the container received. * * gtk_container_propagate expose() takes care of deciding whether * an expose event needs to be sent to the child, intersecting * the event's area with the child area, and sending the event. * * In most cases, a container can simply either simply inherit the * ::expose implementation from GtkContainer, or, do some drawing * and then chain to the ::expose implementation from GtkContainer. **/ void gtk_container_propagate_expose (GtkContainer *container, GtkWidget *child, GdkEventExpose *event) { GdkEventExpose child_event; g_return_if_fail (GTK_IS_CONTAINER (container)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (event != NULL); g_assert (child->parent == GTK_WIDGET (container)); if (GTK_WIDGET_DRAWABLE (child) && GTK_WIDGET_NO_WINDOW (child) && (child->window == event->window)) { child_event = *event; child_event.region = gtk_widget_region_intersect (child, event->region); if (!gdk_region_empty (child_event.region)) { gdk_region_get_clipbox (child_event.region, &child_event.area); gtk_widget_send_expose (child, (GdkEvent *)&child_event); } gdk_region_destroy (child_event.region); } }