1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 #include "gtkcontainer.h"
30 #include "gtkcontainerprivate.h"
36 #include <gobject/gobjectnotifyqueue.c>
37 #include <gobject/gvaluecollector.h>
39 #include "gtkbuildable.h"
40 #include "gtkbuilderprivate.h"
41 #include "gtktypebuiltins.h"
42 #include "gtkprivate.h"
44 #include "gtkmarshalers.h"
45 #include "gtksizerequest.h"
46 #include "gtkwidgetprivate.h"
47 #include "gtkwindow.h"
49 #include "gtktoolbar.h"
53 * SECTION:gtkcontainer
54 * @Short_description: Base class for widgets which contain other widgets
55 * @Title: GtkContainer
57 * A GTK+ user interface is constructed by nesting widgets inside widgets.
58 * Container widgets are the inner nodes in the resulting tree of widgets:
59 * they contain other widgets. So, for example, you might have a #GtkWindow
60 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
61 * of a textual label inside the frame, you might replace the #GtkLabel widget
62 * with a #GtkImage widget.
64 * There are two major kinds of container widgets in GTK+. Both are subclasses
65 * of the abstract GtkContainer base class.
67 * The first type of container widget has a single child widget and derives
68 * from #GtkBin. These containers are <emphasis>decorators</emphasis>, which
69 * add some kind of functionality to the child. For example, a #GtkButton makes
70 * its child into a clickable button; a #GtkFrame draws a frame around its child
71 * and a #GtkWindow places its child widget inside a top-level window.
73 * The second type of container can have more than one child; its purpose is to
74 * manage <emphasis>layout</emphasis>. This means that these containers assign
75 * sizes and positions to their children. For example, a #GtkHBox arranges its
76 * children in a horizontal row, and a #GtkTable arranges the widgets it contains
77 * in a two-dimensional grid.
79 * <refsect2 id="container-geometry-management">
80 * <title>Height for width geometry management</title>
82 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
83 * Height-for-width means that a widget can change how much vertical space it needs,
84 * depending on the amount of horizontal space that it is given (and similar for
87 * There are some things to keep in mind when implementing container widgets
88 * that make use of GTK+'s height for width geometry management system. First,
89 * it's important to note that a container must prioritize one of its
90 * dimensions, that is to say that a widget or container can only have a
91 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
92 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
93 * must be able to respond to the APIs for both dimensions, i.e. even if a
94 * widget has a request mode that is height-for-width, it is possible that
95 * its parent will request its sizes using the width-for-height APIs.
97 * To ensure that everything works properly, here are some guidelines to follow
98 * when implementing height-for-width (or width-for-height) containers.
100 * Each request mode involves 2 virtual methods. Height-for-width apis run
101 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
102 * When handling requests in the opposite #GtkSizeRequestMode it is important that
103 * every widget request at least enough space to display all of its content at all times.
105 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
106 * the container must return the height for its minimum width. This is easily achieved by
107 * simply calling the reverse apis implemented for itself as follows:
109 * <programlisting><![CDATA[
111 * foo_container_get_preferred_height (GtkWidget *widget, gint *min_height, gint *nat_height)
113 * if (i_am_in_height_for_width_mode)
117 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
118 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width,
119 * min_height, nat_height);
123 * ... many containers support both request modes, execute the real width-for-height
124 * request here by returning the collective heights of all widgets that are
125 * stacked vertically (or whatever is appropriate for this container) ...
128 * ]]></programlisting>
130 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
131 * that is height-for-width, it then only needs to return the base minimum width like so:
133 * <programlisting><![CDATA[
135 * foo_container_get_preferred_width_for_height (GtkWidget *widget, gint for_height,
136 * gint *min_width, gint *nat_width)
138 * if (i_am_in_height_for_width_mode)
140 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, min_width, nat_width);
144 * ... execute the real width-for-height request here based on the required width
145 * of the children collectively if the container were to be allocated the said height ...
148 * ]]></programlisting>
150 * Height for width requests are generally implemented in terms of a virtual allocation
151 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
152 * would implement the <function>get_preferred_height_for_width()</function> virtual function by first calling
153 * gtk_widget_get_preferred_width() for each of its children.
155 * For each potential group of children that are lined up horizontally, the values returned by
156 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures.
157 * Any child spacing should be removed from the input @for_width and then the collective size should be
158 * allocated using the gtk_distribute_natural_allocation() convenience function.
160 * The container will then move on to request the preferred height for each child by using
161 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
163 * To allocate a height-for-width container, it's again important
164 * to consider that a container must prioritize one dimension over the other. So if
165 * a container is a height-for-width container it must first allocate all widgets horizontally
166 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
167 * extra space (if and where appropriate) for the widget to expand.
169 * After adding all the expand space, the container assumes it was allocated sufficient
170 * height to fit all of its content. At this time, the container must use the total horizontal sizes
171 * of each widget to request the height-for-width of each of its children and store the requests in a
172 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
173 * be generalized into the heights and widths of rows and columns).
174 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
175 * while this time considering the allocated height of the widget minus any vertical spacing
176 * that the container adds. Then vertical expand space should be added where appropriate and available
177 * and the container should go on to actually allocating the child widgets.
179 * See <link linkend="geometry-management">GtkWidget's geometry management section</link>
180 * to learn more about implementing height-for-width geometry management for widgets.
183 * <refsect2 id="child-properties">
184 * <title>Child properties</title>
186 * GtkContainer introduces <emphasis>child properties</emphasis>.
187 * These are object properties that are not specific
188 * to either the container or the contained widget, but rather to their relation.
189 * Typical examples of child properties are the position or pack-type of a widget
190 * which is contained in a #GtkBox.
192 * Use gtk_container_class_install_child_property() to install child properties
193 * for a container class and gtk_container_class_find_child_property() or
194 * gtk_container_class_list_child_properties() to get information about existing
197 * To set the value of a child property, use gtk_container_child_set_property(),
198 * gtk_container_child_set() or gtk_container_child_set_valist().
199 * To obtain the value of a child property, use
200 * gtk_container_child_get_property(), gtk_container_child_get() or
201 * gtk_container_child_get_valist(). To emit notification about child property
202 * changes, use gtk_widget_child_notify().
205 * <refsect2 id="GtkContainer-BUILDER-UI">
206 * <title>GtkContainer as GtkBuildable</title>
208 * The GtkContainer implementation of the GtkBuildable interface
209 * supports a <packing> element for children, which can
210 * contain multiple <property> elements that specify
211 * child properties for the child.
213 * <title>Child properties in UI definitions</title>
214 * <programlisting><![CDATA[
215 * <object class="GtkVBox">
217 * <object class="GtkLabel"/>
219 * <property name="pack-type">start</property>
223 * ]]></programlisting>
225 * Since 2.16, child properties can also be marked as translatable using
226 * the same "translatable", "comments" and "context" attributes that are used
227 * for regular properties.
233 struct _GtkContainerPrivate
235 GtkWidget *focus_child;
237 guint border_width : 16;
239 guint has_focus_chain : 1;
240 guint need_resize : 1;
241 guint reallocate_redraws : 1;
242 guint resize_mode : 2;
243 guint request_mode : 2;
261 #define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
262 #define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
265 /* --- prototypes --- */
266 static void gtk_container_base_class_init (GtkContainerClass *klass);
267 static void gtk_container_base_class_finalize (GtkContainerClass *klass);
268 static void gtk_container_class_init (GtkContainerClass *klass);
269 static void gtk_container_init (GtkContainer *container);
270 static void gtk_container_destroy (GtkWidget *widget);
271 static void gtk_container_set_property (GObject *object,
275 static void gtk_container_get_property (GObject *object,
279 static void gtk_container_add_unimplemented (GtkContainer *container,
281 static void gtk_container_remove_unimplemented (GtkContainer *container,
283 static void gtk_container_real_check_resize (GtkContainer *container);
284 static void gtk_container_compute_expand (GtkWidget *widget,
286 gboolean *vexpand_p);
287 static gboolean gtk_container_focus (GtkWidget *widget,
288 GtkDirectionType direction);
289 static void gtk_container_real_set_focus_child (GtkContainer *container,
292 static gboolean gtk_container_focus_move (GtkContainer *container,
294 GtkDirectionType direction);
295 static void gtk_container_children_callback (GtkWidget *widget,
296 gpointer client_data);
297 static void gtk_container_show_all (GtkWidget *widget);
298 static gint gtk_container_draw (GtkWidget *widget,
300 static void gtk_container_map (GtkWidget *widget);
301 static void gtk_container_unmap (GtkWidget *widget);
302 static void gtk_container_adjust_size_request (GtkWidget *widget,
303 GtkOrientation orientation,
306 static void gtk_container_adjust_size_allocation (GtkWidget *widget,
307 GtkOrientation orientation,
311 gint *allocated_size);
312 static GtkSizeRequestMode gtk_container_get_request_mode (GtkWidget *widget);
314 static gchar* gtk_container_child_default_composite_name (GtkContainer *container,
317 static GtkWidgetPath * gtk_container_real_get_path_for_child (GtkContainer *container,
321 static void gtk_container_buildable_init (GtkBuildableIface *iface);
322 static void gtk_container_buildable_add_child (GtkBuildable *buildable,
326 static gboolean gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
329 const gchar *tagname,
330 GMarkupParser *parser,
332 static void gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
335 const gchar *tagname,
339 /* --- variables --- */
340 static const gchar vadjustment_key[] = "gtk-vadjustment";
341 static guint vadjustment_key_id = 0;
342 static const gchar hadjustment_key[] = "gtk-hadjustment";
343 static guint hadjustment_key_id = 0;
344 static GSList *container_resize_queue = NULL;
345 static guint container_signals[LAST_SIGNAL] = { 0 };
346 static GtkWidgetClass *parent_class = NULL;
347 extern GParamSpecPool *_gtk_widget_child_property_pool;
348 extern GObjectNotifyContext *_gtk_widget_child_property_notify_context;
349 static GtkBuildableIface *parent_buildable_iface;
352 /* --- functions --- */
354 gtk_container_get_type (void)
356 static GType container_type = 0;
360 const GTypeInfo container_info =
362 sizeof (GtkContainerClass),
363 (GBaseInitFunc) gtk_container_base_class_init,
364 (GBaseFinalizeFunc) gtk_container_base_class_finalize,
365 (GClassInitFunc) gtk_container_class_init,
366 NULL /* class_finalize */,
367 NULL /* class_data */,
368 sizeof (GtkContainer),
370 (GInstanceInitFunc) gtk_container_init,
371 NULL, /* value_table */
374 const GInterfaceInfo buildable_info =
376 (GInterfaceInitFunc) gtk_container_buildable_init,
382 g_type_register_static (GTK_TYPE_WIDGET, I_("GtkContainer"),
383 &container_info, G_TYPE_FLAG_ABSTRACT);
385 g_type_add_interface_static (container_type,
391 return container_type;
395 gtk_container_base_class_init (GtkContainerClass *class)
397 /* reset instance specifc class fields that don't get inherited */
398 class->set_child_property = NULL;
399 class->get_child_property = NULL;
403 gtk_container_base_class_finalize (GtkContainerClass *class)
407 list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class));
408 for (node = list; node; node = node->next)
410 GParamSpec *pspec = node->data;
412 g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec);
413 PARAM_SPEC_SET_PARAM_ID (pspec, 0);
414 g_param_spec_unref (pspec);
420 gtk_container_class_init (GtkContainerClass *class)
422 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
423 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
425 parent_class = g_type_class_peek_parent (class);
427 vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
428 hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
430 gobject_class->set_property = gtk_container_set_property;
431 gobject_class->get_property = gtk_container_get_property;
433 widget_class->destroy = gtk_container_destroy;
434 widget_class->compute_expand = gtk_container_compute_expand;
435 widget_class->show_all = gtk_container_show_all;
436 widget_class->draw = gtk_container_draw;
437 widget_class->map = gtk_container_map;
438 widget_class->unmap = gtk_container_unmap;
439 widget_class->focus = gtk_container_focus;
441 widget_class->adjust_size_request = gtk_container_adjust_size_request;
442 widget_class->adjust_size_allocation = gtk_container_adjust_size_allocation;
443 widget_class->get_request_mode = gtk_container_get_request_mode;
445 class->add = gtk_container_add_unimplemented;
446 class->remove = gtk_container_remove_unimplemented;
447 class->check_resize = gtk_container_real_check_resize;
448 class->forall = NULL;
449 class->set_focus_child = gtk_container_real_set_focus_child;
450 class->child_type = NULL;
451 class->composite_name = gtk_container_child_default_composite_name;
452 class->get_path_for_child = gtk_container_real_get_path_for_child;
454 g_object_class_install_property (gobject_class,
456 g_param_spec_enum ("resize-mode",
458 P_("Specify how resize events are handled"),
459 GTK_TYPE_RESIZE_MODE,
461 GTK_PARAM_READWRITE));
462 g_object_class_install_property (gobject_class,
464 g_param_spec_uint ("border-width",
466 P_("The width of the empty border outside the containers children"),
470 GTK_PARAM_READWRITE));
471 g_object_class_install_property (gobject_class,
473 g_param_spec_object ("child",
475 P_("Can be used to add a new child to the container"),
477 GTK_PARAM_WRITABLE));
478 container_signals[ADD] =
479 g_signal_new (I_("add"),
480 G_OBJECT_CLASS_TYPE (gobject_class),
482 G_STRUCT_OFFSET (GtkContainerClass, add),
484 _gtk_marshal_VOID__OBJECT,
487 container_signals[REMOVE] =
488 g_signal_new (I_("remove"),
489 G_OBJECT_CLASS_TYPE (gobject_class),
491 G_STRUCT_OFFSET (GtkContainerClass, remove),
493 _gtk_marshal_VOID__OBJECT,
496 container_signals[CHECK_RESIZE] =
497 g_signal_new (I_("check-resize"),
498 G_OBJECT_CLASS_TYPE (gobject_class),
500 G_STRUCT_OFFSET (GtkContainerClass, check_resize),
502 _gtk_marshal_VOID__VOID,
504 container_signals[SET_FOCUS_CHILD] =
505 g_signal_new (I_("set-focus-child"),
506 G_OBJECT_CLASS_TYPE (gobject_class),
508 G_STRUCT_OFFSET (GtkContainerClass, set_focus_child),
510 _gtk_marshal_VOID__OBJECT,
514 g_type_class_add_private (class, sizeof (GtkContainerPrivate));
518 gtk_container_buildable_init (GtkBuildableIface *iface)
520 parent_buildable_iface = g_type_interface_peek_parent (iface);
521 iface->add_child = gtk_container_buildable_add_child;
522 iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
523 iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
527 gtk_container_buildable_add_child (GtkBuildable *buildable,
534 GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
536 else if (GTK_IS_WIDGET (child) &&
537 gtk_widget_get_parent (GTK_WIDGET (child)) == NULL)
539 gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
542 g_warning ("Cannot add an object of type %s to a container of type %s",
543 g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
547 gtk_container_buildable_set_child_property (GtkContainer *container,
554 GValue gvalue = { 0, };
555 GError *error = NULL;
557 pspec = gtk_container_class_find_child_property
558 (G_OBJECT_GET_CLASS (container), name);
561 g_warning ("%s does not have a property called %s",
562 g_type_name (G_OBJECT_TYPE (container)), name);
566 if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
568 g_warning ("Could not read property %s:%s with value %s of type %s: %s",
569 g_type_name (G_OBJECT_TYPE (container)),
572 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
574 g_error_free (error);
578 gtk_container_child_set_property (container, child, name, &gvalue);
579 g_value_unset (&gvalue);
584 GtkContainer *container;
587 gchar *child_prop_name;
589 gboolean translatable;
590 } PackingPropertiesData;
593 attributes_start_element (GMarkupParseContext *context,
594 const gchar *element_name,
596 const gchar **values,
600 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
603 if (strcmp (element_name, "property") == 0)
605 for (i = 0; names[i]; i++)
606 if (strcmp (names[i], "name") == 0)
607 parser_data->child_prop_name = g_strdup (values[i]);
608 else if (strcmp (names[i], "translatable") == 0)
610 if (!_gtk_builder_boolean_from_string (values[1],
611 &parser_data->translatable,
615 else if (strcmp (names[i], "comments") == 0)
616 ; /* for translators */
617 else if (strcmp (names[i], "context") == 0)
618 parser_data->context = g_strdup (values[1]);
620 g_warning ("Unsupported attribute for GtkContainer Child "
621 "property: %s\n", names[i]);
623 else if (strcmp (element_name, "packing") == 0)
626 g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
630 attributes_text_element (GMarkupParseContext *context,
636 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
638 if (parser_data->child_prop_name)
639 g_string_append_len (parser_data->string, text, text_len);
643 attributes_end_element (GMarkupParseContext *context,
644 const gchar *element_name,
648 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
650 /* translate the string */
651 if (parser_data->string->len && parser_data->translatable)
656 domain = gtk_builder_get_translation_domain (parser_data->builder);
658 translated = _gtk_builder_parser_translate (domain,
659 parser_data->context,
660 parser_data->string->str);
661 g_string_set_size (parser_data->string, 0);
662 g_string_append (parser_data->string, translated);
665 if (parser_data->child_prop_name)
666 gtk_container_buildable_set_child_property (parser_data->container,
667 parser_data->builder,
669 parser_data->child_prop_name,
670 parser_data->string->str);
672 g_string_set_size (parser_data->string, 0);
673 g_free (parser_data->child_prop_name);
674 g_free (parser_data->context);
675 parser_data->child_prop_name = NULL;
676 parser_data->context = NULL;
677 parser_data->translatable = FALSE;
680 static const GMarkupParser attributes_parser =
682 attributes_start_element,
683 attributes_end_element,
684 attributes_text_element,
688 gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
691 const gchar *tagname,
692 GMarkupParser *parser,
695 PackingPropertiesData *parser_data;
697 if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
698 tagname, parser, data))
701 if (child && strcmp (tagname, "packing") == 0)
703 parser_data = g_slice_new0 (PackingPropertiesData);
704 parser_data->string = g_string_new ("");
705 parser_data->builder = builder;
706 parser_data->container = GTK_CONTAINER (buildable);
707 parser_data->child = GTK_WIDGET (child);
708 parser_data->child_prop_name = NULL;
710 *parser = attributes_parser;
719 gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
722 const gchar *tagname,
725 if (strcmp (tagname, "packing") == 0)
727 PackingPropertiesData *parser_data = (PackingPropertiesData*)data;
728 g_string_free (parser_data->string, TRUE);
729 g_slice_free (PackingPropertiesData, parser_data);
733 if (parent_buildable_iface->custom_tag_end)
734 parent_buildable_iface->custom_tag_end (buildable, builder,
735 child, tagname, data);
739 * gtk_container_child_type:
740 * @container: a #GtkContainer
742 * Returns the type of the children supported by the container.
744 * Note that this may return %G_TYPE_NONE to indicate that no more
745 * children can be added, e.g. for a #GtkPaned which already has two
748 * Return value: a #GType.
751 gtk_container_child_type (GtkContainer *container)
754 GtkContainerClass *class;
756 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
758 class = GTK_CONTAINER_GET_CLASS (container);
759 if (class->child_type)
760 slot = class->child_type (container);
767 /* --- GtkContainer child property mechanism --- */
770 * gtk_container_child_notify:
771 * @container: the #GtkContainer
772 * @widget: the child widget
773 * @child_property: the name of a chld property installed on
774 * the class of @container
776 * Emits a #GtkWidget::child-notify signal for the
777 * <link linkend="child-properties">child property</link>
778 * @child_property on widget.
780 * This is an analogue of g_object_notify() for child properties.
782 * Also see gtk_widget_child_notify().
787 gtk_container_child_notify (GtkContainer *container,
789 const gchar *child_property)
794 g_return_if_fail (GTK_IS_CONTAINER (container));
795 g_return_if_fail (GTK_IS_WIDGET (widget));
796 g_return_if_fail (child_property != NULL);
798 obj = G_OBJECT (widget);
800 if (obj->ref_count == 0)
805 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
807 G_OBJECT_TYPE (container),
812 g_warning ("%s: container class `%s' has no child property named `%s'",
814 G_OBJECT_TYPE_NAME (container),
819 GObjectNotifyQueue *nqueue;
821 nqueue = g_object_notify_queue_freeze (obj, _gtk_widget_child_property_notify_context);
823 g_object_notify_queue_add (obj, nqueue, pspec);
824 g_object_notify_queue_thaw (obj, nqueue);
827 g_object_unref (obj);
831 container_get_child_property (GtkContainer *container,
836 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
838 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
842 container_set_child_property (GtkContainer *container,
846 GObjectNotifyQueue *nqueue)
848 GValue tmp_value = { 0, };
849 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
851 /* provide a copy to work from, convert (if necessary) and validate */
852 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
853 if (!g_value_transform (value, &tmp_value))
854 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
856 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
857 G_VALUE_TYPE_NAME (value));
858 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
860 gchar *contents = g_strdup_value_contents (value);
862 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
864 G_VALUE_TYPE_NAME (value),
866 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
871 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
872 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
874 g_value_unset (&tmp_value);
878 * gtk_container_child_get_valist:
879 * @container: a #GtkContainer
880 * @child: a widget which is a child of @container
881 * @first_property_name: the name of the first property to get
882 * @var_args: return location for the first property, followed
883 * optionally by more name/return location pairs, followed by %NULL
885 * Gets the values of one or more child properties for @child and @container.
888 gtk_container_child_get_valist (GtkContainer *container,
890 const gchar *first_property_name,
895 g_return_if_fail (GTK_IS_CONTAINER (container));
896 g_return_if_fail (GTK_IS_WIDGET (child));
898 g_object_ref (container);
899 g_object_ref (child);
901 name = first_property_name;
904 GValue value = { 0, };
908 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
910 G_OBJECT_TYPE (container),
914 g_warning ("%s: container class `%s' has no child property named `%s'",
916 G_OBJECT_TYPE_NAME (container),
920 if (!(pspec->flags & G_PARAM_READABLE))
922 g_warning ("%s: child property `%s' of container class `%s' is not readable",
925 G_OBJECT_TYPE_NAME (container));
928 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
929 container_get_child_property (container, child, pspec, &value);
930 G_VALUE_LCOPY (&value, var_args, 0, &error);
933 g_warning ("%s: %s", G_STRLOC, error);
935 g_value_unset (&value);
938 g_value_unset (&value);
939 name = va_arg (var_args, gchar*);
942 g_object_unref (child);
943 g_object_unref (container);
947 * gtk_container_child_get_property:
948 * @container: a #GtkContainer
949 * @child: a widget which is a child of @container
950 * @property_name: the name of the property to get
951 * @value: a location to return the value
953 * Gets the value of a child property for @child and @container.
956 gtk_container_child_get_property (GtkContainer *container,
958 const gchar *property_name,
963 g_return_if_fail (GTK_IS_CONTAINER (container));
964 g_return_if_fail (GTK_IS_WIDGET (child));
965 g_return_if_fail (property_name != NULL);
966 g_return_if_fail (G_IS_VALUE (value));
968 g_object_ref (container);
969 g_object_ref (child);
970 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
971 G_OBJECT_TYPE (container), TRUE);
973 g_warning ("%s: container class `%s' has no child property named `%s'",
975 G_OBJECT_TYPE_NAME (container),
977 else if (!(pspec->flags & G_PARAM_READABLE))
978 g_warning ("%s: child property `%s' of container class `%s' is not readable",
981 G_OBJECT_TYPE_NAME (container));
984 GValue *prop_value, tmp_value = { 0, };
986 /* auto-conversion of the callers value type
988 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
990 g_value_reset (value);
993 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
995 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
997 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
998 G_VALUE_TYPE_NAME (value));
999 g_object_unref (child);
1000 g_object_unref (container);
1005 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
1006 prop_value = &tmp_value;
1008 container_get_child_property (container, child, pspec, prop_value);
1009 if (prop_value != value)
1011 g_value_transform (prop_value, value);
1012 g_value_unset (&tmp_value);
1015 g_object_unref (child);
1016 g_object_unref (container);
1020 * gtk_container_child_set_valist:
1021 * @container: a #GtkContainer
1022 * @child: a widget which is a child of @container
1023 * @first_property_name: the name of the first property to set
1024 * @var_args: a %NULL-terminated list of property names and values, starting
1025 * with @first_prop_name
1027 * Sets one or more child properties for @child and @container.
1030 gtk_container_child_set_valist (GtkContainer *container,
1032 const gchar *first_property_name,
1035 GObjectNotifyQueue *nqueue;
1038 g_return_if_fail (GTK_IS_CONTAINER (container));
1039 g_return_if_fail (GTK_IS_WIDGET (child));
1041 g_object_ref (container);
1042 g_object_ref (child);
1044 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1045 name = first_property_name;
1048 GValue value = { 0, };
1049 gchar *error = NULL;
1050 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1052 G_OBJECT_TYPE (container),
1056 g_warning ("%s: container class `%s' has no child property named `%s'",
1058 G_OBJECT_TYPE_NAME (container),
1062 if (!(pspec->flags & G_PARAM_WRITABLE))
1064 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1067 G_OBJECT_TYPE_NAME (container));
1071 G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
1072 var_args, 0, &error);
1075 g_warning ("%s: %s", G_STRLOC, error);
1078 /* we purposely leak the value here, it might not be
1079 * in a sane state if an error condition occoured
1083 container_set_child_property (container, child, pspec, &value, nqueue);
1084 g_value_unset (&value);
1085 name = va_arg (var_args, gchar*);
1087 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1089 g_object_unref (container);
1090 g_object_unref (child);
1094 * gtk_container_child_set_property:
1095 * @container: a #GtkContainer
1096 * @child: a widget which is a child of @container
1097 * @property_name: the name of the property to set
1098 * @value: the value to set the property to
1100 * Sets a child property for @child and @container.
1103 gtk_container_child_set_property (GtkContainer *container,
1105 const gchar *property_name,
1106 const GValue *value)
1108 GObjectNotifyQueue *nqueue;
1111 g_return_if_fail (GTK_IS_CONTAINER (container));
1112 g_return_if_fail (GTK_IS_WIDGET (child));
1113 g_return_if_fail (property_name != NULL);
1114 g_return_if_fail (G_IS_VALUE (value));
1116 g_object_ref (container);
1117 g_object_ref (child);
1119 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1120 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1121 G_OBJECT_TYPE (container), TRUE);
1123 g_warning ("%s: container class `%s' has no child property named `%s'",
1125 G_OBJECT_TYPE_NAME (container),
1127 else if (!(pspec->flags & G_PARAM_WRITABLE))
1128 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1131 G_OBJECT_TYPE_NAME (container));
1134 container_set_child_property (container, child, pspec, value, nqueue);
1136 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1137 g_object_unref (container);
1138 g_object_unref (child);
1142 * gtk_container_add_with_properties:
1143 * @container: a #GtkContainer
1144 * @widget: a widget to be placed inside @container
1145 * @first_prop_name: the name of the first child property to set
1146 * @Varargs: a %NULL-terminated list of property names and values, starting
1147 * with @first_prop_name
1149 * Adds @widget to @container, setting child properties at the same time.
1150 * See gtk_container_add() and gtk_container_child_set() for more details.
1153 gtk_container_add_with_properties (GtkContainer *container,
1155 const gchar *first_prop_name,
1158 g_return_if_fail (GTK_IS_CONTAINER (container));
1159 g_return_if_fail (GTK_IS_WIDGET (widget));
1160 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1162 g_object_ref (container);
1163 g_object_ref (widget);
1164 gtk_widget_freeze_child_notify (widget);
1166 g_signal_emit (container, container_signals[ADD], 0, widget);
1167 if (gtk_widget_get_parent (widget))
1171 va_start (var_args, first_prop_name);
1172 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1176 gtk_widget_thaw_child_notify (widget);
1177 g_object_unref (widget);
1178 g_object_unref (container);
1182 * gtk_container_child_set:
1183 * @container: a #GtkContainer
1184 * @child: a widget which is a child of @container
1185 * @first_prop_name: the name of the first property to set
1186 * @Varargs: a %NULL-terminated list of property names and values, starting
1187 * with @first_prop_name
1189 * Sets one or more child properties for @child and @container.
1192 gtk_container_child_set (GtkContainer *container,
1194 const gchar *first_prop_name,
1199 va_start (var_args, first_prop_name);
1200 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1205 * gtk_container_child_get:
1206 * @container: a #GtkContainer
1207 * @child: a widget which is a child of @container
1208 * @first_prop_name: the name of the first property to get
1209 * @Varargs: return location for the first property, followed
1210 * optionally by more name/return location pairs, followed by %NULL
1212 * Gets the values of one or more child properties for @child and @container.
1215 gtk_container_child_get (GtkContainer *container,
1217 const gchar *first_prop_name,
1222 va_start (var_args, first_prop_name);
1223 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1228 * gtk_container_class_install_child_property:
1229 * @cclass: a #GtkContainerClass
1230 * @property_id: the id for the property
1231 * @pspec: the #GParamSpec for the property
1233 * Installs a child property on a container class.
1236 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1240 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1241 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1242 if (pspec->flags & G_PARAM_WRITABLE)
1243 g_return_if_fail (cclass->set_child_property != NULL);
1244 if (pspec->flags & G_PARAM_READABLE)
1245 g_return_if_fail (cclass->get_child_property != NULL);
1246 g_return_if_fail (property_id > 0);
1247 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1248 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1249 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1251 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1253 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1254 G_OBJECT_CLASS_NAME (cclass),
1258 g_param_spec_ref (pspec);
1259 g_param_spec_sink (pspec);
1260 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1261 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1265 * gtk_container_class_find_child_property:
1266 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1267 * @property_name: the name of the child property to find
1268 * @returns: (transfer none): the #GParamSpec of the child property or
1269 * %NULL if @class has no child property with that name.
1271 * Finds a child property of a container class by name.
1274 gtk_container_class_find_child_property (GObjectClass *cclass,
1275 const gchar *property_name)
1277 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1278 g_return_val_if_fail (property_name != NULL, NULL);
1280 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1282 G_OBJECT_CLASS_TYPE (cclass),
1287 * gtk_container_class_list_child_properties:
1288 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1289 * @n_properties: location to return the number of child properties found
1290 * @returns: (array length=n_properties) (transfer container): a newly
1291 * allocated %NULL-terminated array of #GParamSpec*. The
1292 * array must be freed with g_free().
1294 * Returns all child properties of a container class.
1297 gtk_container_class_list_child_properties (GObjectClass *cclass,
1298 guint *n_properties)
1300 GParamSpec **pspecs;
1303 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1305 pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
1306 G_OBJECT_CLASS_TYPE (cclass),
1315 gtk_container_add_unimplemented (GtkContainer *container,
1318 g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1322 gtk_container_remove_unimplemented (GtkContainer *container,
1325 g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1329 gtk_container_init (GtkContainer *container)
1331 GtkContainerPrivate *priv;
1333 container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
1335 GtkContainerPrivate);
1336 priv = container->priv;
1338 priv->focus_child = NULL;
1339 priv->border_width = 0;
1340 priv->need_resize = FALSE;
1341 priv->resize_mode = GTK_RESIZE_PARENT;
1342 priv->reallocate_redraws = FALSE;
1346 gtk_container_destroy (GtkWidget *widget)
1348 GtkContainer *container = GTK_CONTAINER (widget);
1349 GtkContainerPrivate *priv = container->priv;
1351 if (_gtk_widget_get_resize_pending (GTK_WIDGET (container)))
1352 _gtk_container_dequeue_resize_handler (container);
1354 if (priv->focus_child)
1356 g_object_unref (priv->focus_child);
1357 priv->focus_child = NULL;
1360 /* do this before walking child widgets, to avoid
1361 * removing children from focus chain one by one.
1363 if (priv->has_focus_chain)
1364 gtk_container_unset_focus_chain (container);
1366 gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
1368 GTK_WIDGET_CLASS (parent_class)->destroy (widget);
1372 gtk_container_set_property (GObject *object,
1374 const GValue *value,
1377 GtkContainer *container = GTK_CONTAINER (object);
1381 case PROP_BORDER_WIDTH:
1382 gtk_container_set_border_width (container, g_value_get_uint (value));
1384 case PROP_RESIZE_MODE:
1385 gtk_container_set_resize_mode (container, g_value_get_enum (value));
1388 gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
1391 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1397 gtk_container_get_property (GObject *object,
1402 GtkContainer *container = GTK_CONTAINER (object);
1403 GtkContainerPrivate *priv = container->priv;
1407 case PROP_BORDER_WIDTH:
1408 g_value_set_uint (value, priv->border_width);
1410 case PROP_RESIZE_MODE:
1411 g_value_set_enum (value, priv->resize_mode);
1414 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1420 * gtk_container_set_border_width:
1421 * @container: a #GtkContainer
1422 * @border_width: amount of blank space to leave <emphasis>outside</emphasis>
1423 * the container. Valid values are in the range 0-65535 pixels.
1425 * Sets the border width of the container.
1427 * The border width of a container is the amount of space to leave
1428 * around the outside of the container. The only exception to this is
1429 * #GtkWindow; because toplevel windows can't leave space outside,
1430 * they leave the space inside. The border is added on all sides of
1431 * the container. To add space to only one side, one approach is to
1432 * create a #GtkAlignment widget, call gtk_widget_set_size_request()
1433 * to give it a size, and place it on the side of the container as
1437 gtk_container_set_border_width (GtkContainer *container,
1440 GtkContainerPrivate *priv;
1442 g_return_if_fail (GTK_IS_CONTAINER (container));
1444 priv = container->priv;
1446 if (priv->border_width != border_width)
1448 priv->border_width = border_width;
1449 g_object_notify (G_OBJECT (container), "border-width");
1451 if (gtk_widget_get_realized (GTK_WIDGET (container)))
1452 gtk_widget_queue_resize (GTK_WIDGET (container));
1457 * gtk_container_get_border_width:
1458 * @container: a #GtkContainer
1460 * Retrieves the border width of the container. See
1461 * gtk_container_set_border_width().
1463 * Return value: the current border width
1466 gtk_container_get_border_width (GtkContainer *container)
1468 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
1470 return container->priv->border_width;
1474 * gtk_container_add:
1475 * @container: a #GtkContainer
1476 * @widget: a widget to be placed inside @container
1478 * Adds @widget to @container. Typically used for simple containers
1479 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
1480 * layout containers such as #GtkBox or #GtkTable, this function will
1481 * pick default packing parameters that may not be correct. So
1482 * consider functions such as gtk_box_pack_start() and
1483 * gtk_table_attach() as an alternative to gtk_container_add() in
1484 * those cases. A widget may be added to only one container at a time;
1485 * you can't place the same widget inside two different containers.
1488 gtk_container_add (GtkContainer *container,
1493 g_return_if_fail (GTK_IS_CONTAINER (container));
1494 g_return_if_fail (GTK_IS_WIDGET (widget));
1496 parent = gtk_widget_get_parent (widget);
1500 g_warning ("Attempting to add a widget with type %s to a container of "
1501 "type %s, but the widget is already inside a container of type %s, "
1502 "please use gtk_widget_reparent()" ,
1503 g_type_name (G_OBJECT_TYPE (widget)),
1504 g_type_name (G_OBJECT_TYPE (container)),
1505 g_type_name (G_OBJECT_TYPE (parent)));
1509 g_signal_emit (container, container_signals[ADD], 0, widget);
1513 * gtk_container_remove:
1514 * @container: a #GtkContainer
1515 * @widget: a current child of @container
1517 * Removes @widget from @container. @widget must be inside @container.
1518 * Note that @container will own a reference to @widget, and that this
1519 * may be the last reference held; so removing a widget from its
1520 * container can destroy that widget. If you want to use @widget
1521 * again, you need to add a reference to it while it's not inside
1522 * a container, using g_object_ref(). If you don't want to use @widget
1523 * again it's usually more efficient to simply destroy it directly
1524 * using gtk_widget_destroy() since this will remove it from the
1525 * container and help break any circular reference count cycles.
1528 gtk_container_remove (GtkContainer *container,
1531 g_return_if_fail (GTK_IS_CONTAINER (container));
1532 g_return_if_fail (GTK_IS_WIDGET (widget));
1533 g_return_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (container));
1535 g_signal_emit (container, container_signals[REMOVE], 0, widget);
1539 _gtk_container_dequeue_resize_handler (GtkContainer *container)
1541 g_return_if_fail (GTK_IS_CONTAINER (container));
1542 g_return_if_fail (_gtk_widget_get_resize_pending (GTK_WIDGET (container)));
1544 container_resize_queue = g_slist_remove (container_resize_queue, container);
1545 _gtk_widget_set_resize_pending (GTK_WIDGET (container), FALSE);
1549 * gtk_container_set_resize_mode:
1550 * @container: a #GtkContainer
1551 * @resize_mode: the new resize mode
1553 * Sets the resize mode for the container.
1555 * The resize mode of a container determines whether a resize request
1556 * will be passed to the container's parent, queued for later execution
1557 * or executed immediately.
1560 gtk_container_set_resize_mode (GtkContainer *container,
1561 GtkResizeMode resize_mode)
1563 GtkContainerPrivate *priv;
1565 g_return_if_fail (GTK_IS_CONTAINER (container));
1566 g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
1568 priv = container->priv;
1570 if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
1571 resize_mode == GTK_RESIZE_PARENT)
1573 resize_mode = GTK_RESIZE_QUEUE;
1576 if (priv->resize_mode != resize_mode)
1578 priv->resize_mode = resize_mode;
1580 gtk_widget_queue_resize (GTK_WIDGET (container));
1581 g_object_notify (G_OBJECT (container), "resize-mode");
1586 * gtk_container_get_resize_mode:
1587 * @container: a #GtkContainer
1589 * Returns the resize mode for the container. See
1590 * gtk_container_set_resize_mode ().
1592 * Return value: the current resize mode
1595 gtk_container_get_resize_mode (GtkContainer *container)
1597 g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
1599 return container->priv->resize_mode;
1603 * gtk_container_set_reallocate_redraws:
1604 * @container: a #GtkContainer
1605 * @needs_redraws: the new value for the container's @reallocate_redraws flag
1607 * Sets the @reallocate_redraws flag of the container to the given value.
1609 * Containers requesting reallocation redraws get automatically
1610 * redrawn if any of their children changed allocation.
1613 gtk_container_set_reallocate_redraws (GtkContainer *container,
1614 gboolean needs_redraws)
1616 g_return_if_fail (GTK_IS_CONTAINER (container));
1618 container->priv->reallocate_redraws = needs_redraws ? TRUE : FALSE;
1621 static GtkContainer*
1622 gtk_container_get_resize_container (GtkContainer *container)
1625 GtkWidget *widget = GTK_WIDGET (container);
1627 while ((parent = gtk_widget_get_parent (widget)))
1630 if (GTK_IS_RESIZE_CONTAINER (widget))
1634 return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;
1638 gtk_container_idle_sizer (gpointer data)
1640 /* we may be invoked with a container_resize_queue of NULL, because
1641 * queue_resize could have been adding an extra idle function while
1642 * the queue still got processed. we better just ignore such case
1643 * than trying to explicitely work around them with some extra flags,
1644 * since it doesn't cause any actual harm.
1646 while (container_resize_queue)
1651 slist = container_resize_queue;
1652 container_resize_queue = slist->next;
1653 widget = slist->data;
1654 g_slist_free_1 (slist);
1656 _gtk_widget_set_resize_pending (widget, FALSE);
1657 gtk_container_check_resize (GTK_CONTAINER (widget));
1660 gdk_window_process_all_updates ();
1666 _gtk_container_queue_resize_internal (GtkContainer *container,
1667 gboolean invalidate_only)
1669 GtkContainer *resize_container;
1673 g_return_if_fail (GTK_IS_CONTAINER (container));
1675 widget = GTK_WIDGET (container);
1677 resize_container = gtk_container_get_resize_container (container);
1681 _gtk_widget_set_alloc_needed (widget, TRUE);
1682 _gtk_widget_set_width_request_needed (widget, TRUE);
1683 _gtk_widget_set_height_request_needed (widget, TRUE);
1685 if ((resize_container && widget == GTK_WIDGET (resize_container)) ||
1686 !(parent = gtk_widget_get_parent (widget)))
1692 if (resize_container && !invalidate_only)
1694 if (gtk_widget_get_visible (GTK_WIDGET (resize_container)) &&
1695 (gtk_widget_is_toplevel (GTK_WIDGET (resize_container)) ||
1696 gtk_widget_get_realized (GTK_WIDGET (resize_container))))
1698 switch (resize_container->priv->resize_mode)
1700 case GTK_RESIZE_QUEUE:
1701 if (!_gtk_widget_get_resize_pending (GTK_WIDGET (resize_container)))
1703 _gtk_widget_set_resize_pending (GTK_WIDGET (resize_container), TRUE);
1704 if (container_resize_queue == NULL)
1705 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1706 gtk_container_idle_sizer,
1708 container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
1712 case GTK_RESIZE_IMMEDIATE:
1713 gtk_container_check_resize (resize_container);
1716 case GTK_RESIZE_PARENT:
1717 g_assert_not_reached ();
1723 /* we need to let hidden resize containers know that something
1724 * changed while they where hidden (currently only evaluated by
1727 resize_container->priv->need_resize = TRUE;
1733 * _gtk_container_queue_resize:
1734 * @container: a #GtkContainer
1736 * Determines the "resize container" in the hierarchy above this container
1737 * (typically the toplevel, but other containers can be set as resize
1738 * containers with gtk_container_set_resize_mode()), marks the container
1739 * and all parents up to and including the resize container as needing
1740 * to have sizes recompted, and if necessary adds the resize container
1741 * to the queue of containers that will be resized out at idle.
1744 _gtk_container_queue_resize (GtkContainer *container)
1746 _gtk_container_queue_resize_internal (container, FALSE);
1750 * _gtk_container_resize_invalidate:
1751 * @container: a #GtkContainer
1753 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1754 * actually queue the resize container for resize.
1757 _gtk_container_resize_invalidate (GtkContainer *container)
1759 _gtk_container_queue_resize_internal (container, TRUE);
1763 gtk_container_check_resize (GtkContainer *container)
1765 g_return_if_fail (GTK_IS_CONTAINER (container));
1767 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1771 gtk_container_real_check_resize (GtkContainer *container)
1773 GtkWidget *widget = GTK_WIDGET (container);
1774 GtkAllocation allocation;
1775 GtkRequisition requisition;
1777 gtk_widget_get_preferred_size (widget,
1778 &requisition, NULL);
1779 gtk_widget_get_allocation (widget, &allocation);
1781 if (requisition.width > allocation.width ||
1782 requisition.height > allocation.height)
1784 if (GTK_IS_RESIZE_CONTAINER (container))
1786 gtk_widget_size_allocate (widget, &allocation);
1787 gtk_widget_set_allocation (widget, &allocation);
1790 gtk_widget_queue_resize (widget);
1794 gtk_container_resize_children (container);
1798 /* The container hasn't changed size but one of its children
1799 * queued a resize request. Which means that the allocation
1800 * is not sufficient for the requisition of some child.
1801 * We've already performed a size request at this point,
1802 * so we simply need to reallocate and let the allocation
1803 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1806 gtk_container_resize_children (GtkContainer *container)
1808 GtkAllocation allocation;
1811 /* resizing invariants:
1812 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1813 * containers that have an idle sizer pending must be flagged with
1816 g_return_if_fail (GTK_IS_CONTAINER (container));
1818 widget = GTK_WIDGET (container);
1819 gtk_widget_get_allocation (widget, &allocation);
1821 gtk_widget_size_allocate (widget, &allocation);
1822 gtk_widget_set_allocation (widget, &allocation);
1826 gtk_container_adjust_size_request (GtkWidget *widget,
1827 GtkOrientation orientation,
1831 GtkContainer *container;
1833 container = GTK_CONTAINER (widget);
1835 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1839 border_width = container->priv->border_width;
1841 *minimum_size += border_width * 2;
1842 *natural_size += border_width * 2;
1845 /* chain up last so gtk_widget_set_size_request() values
1846 * will have a chance to overwrite our border width.
1848 parent_class->adjust_size_request (widget, orientation,
1849 minimum_size, natural_size);
1853 gtk_container_adjust_size_allocation (GtkWidget *widget,
1854 GtkOrientation orientation,
1857 gint *allocated_pos,
1858 gint *allocated_size)
1860 GtkContainer *container;
1863 container = GTK_CONTAINER (widget);
1865 if (!GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1867 parent_class->adjust_size_allocation (widget, orientation,
1868 minimum_size, natural_size, allocated_pos,
1873 border_width = container->priv->border_width;
1875 *allocated_size -= border_width * 2;
1877 /* If we get a pathological too-small allocation to hold
1878 * even the border width, leave all allocation to the actual
1879 * widget, and leave x,y unchanged. (GtkWidget's min size is
1880 * 1x1 if you're wondering why <1 and not <0)
1882 * As long as we have space, set x,y properly.
1885 if (*allocated_size < 1)
1887 *allocated_size += border_width * 2;
1891 *allocated_pos += border_width;
1892 *minimum_size -= border_width * 2;
1893 *natural_size -= border_width * 2;
1896 /* Chain up to GtkWidgetClass *after* removing our border width from
1897 * the proposed allocation size. This is because it's possible that the
1898 * widget was allocated more space than it needs in a said orientation,
1899 * if GtkWidgetClass does any alignments and thus limits the size to the
1900 * natural size... then we need that to be done *after* removing any margins
1901 * and padding values.
1903 parent_class->adjust_size_allocation (widget, orientation,
1904 minimum_size, natural_size, allocated_pos,
1914 count_request_modes (GtkWidget *widget,
1915 RequestModeCount *count)
1917 GtkSizeRequestMode mode = gtk_widget_get_request_mode (widget);
1921 case GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH:
1924 case GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT:
1927 case GTK_SIZE_REQUEST_CONSTANT_SIZE:
1933 static GtkSizeRequestMode
1934 gtk_container_get_request_mode (GtkWidget *widget)
1936 GtkContainer *container = GTK_CONTAINER (widget);
1937 GtkContainerPrivate *priv = container->priv;
1939 /* Recalculate the request mode of the children by majority
1940 * vote whenever the internal content changes */
1941 if (_gtk_widget_get_width_request_needed (widget) ||
1942 _gtk_widget_get_height_request_needed (widget))
1944 RequestModeCount count = { 0, 0 };
1946 gtk_container_forall (container, (GtkCallback)count_request_modes, &count);
1948 if (!count.hfw && !count.wfh)
1949 priv->request_mode = GTK_SIZE_REQUEST_CONSTANT_SIZE;
1951 priv->request_mode = count.wfh > count.hfw ?
1952 GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT :
1953 GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1956 return priv->request_mode;
1960 * gtk_container_class_handle_border_width:
1961 * @klass: the class struct of a #GtkContainer subclass
1963 * Modifies a subclass of #GtkContainerClass to automatically add and
1964 * remove the border-width setting on GtkContainer. This allows the
1965 * subclass to ignore the border width in its size request and
1966 * allocate methods. The intent is for a subclass to invoke this
1967 * in its class_init function.
1969 * gtk_container_class_handle_border_width() is necessary because it
1970 * would break API too badly to make this behavior the default. So
1971 * subclasses must "opt in" to the parent class handling border_width
1975 gtk_container_class_handle_border_width (GtkContainerClass *klass)
1977 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
1979 klass->_handle_border_width = TRUE;
1983 * gtk_container_forall:
1984 * @container: a #GtkContainer
1985 * @callback: (scope call) (closure callback_data): a callback
1986 * @callback_data: callback user data
1988 * Invokes @callback on each child of @container, including children
1989 * that are considered "internal" (implementation details of the
1990 * container). "Internal" children generally weren't added by the user
1991 * of the container, but were added by the container implementation
1992 * itself. Most applications should use gtk_container_foreach(),
1993 * rather than gtk_container_forall().
1998 gtk_container_forall (GtkContainer *container,
1999 GtkCallback callback,
2000 gpointer callback_data)
2002 GtkContainerClass *class;
2004 g_return_if_fail (GTK_IS_CONTAINER (container));
2005 g_return_if_fail (callback != NULL);
2007 class = GTK_CONTAINER_GET_CLASS (container);
2010 class->forall (container, TRUE, callback, callback_data);
2014 * gtk_container_foreach:
2015 * @container: a #GtkContainer
2016 * @callback: (scope call): a callback
2017 * @callback_data: callback user data
2019 * Invokes @callback on each non-internal child of @container. See
2020 * gtk_container_forall() for details on what constitutes an
2021 * "internal" child. Most applications should use
2022 * gtk_container_foreach(), rather than gtk_container_forall().
2025 gtk_container_foreach (GtkContainer *container,
2026 GtkCallback callback,
2027 gpointer callback_data)
2029 GtkContainerClass *class;
2031 g_return_if_fail (GTK_IS_CONTAINER (container));
2032 g_return_if_fail (callback != NULL);
2034 class = GTK_CONTAINER_GET_CLASS (container);
2037 class->forall (container, FALSE, callback, callback_data);
2041 * gtk_container_set_focus_child:
2042 * @container: a #GtkContainer
2043 * @child: (allow-none): a #GtkWidget, or %NULL
2045 * Sets, or unsets if @child is %NULL, the focused child of @container.
2047 * This function emits the GtkContainer::set_focus_child signal of
2048 * @container. Implementations of #GtkContainer can override the
2049 * default behaviour by overriding the class closure of this signal.
2051 * This is function is mostly meant to be used by widgets. Applications can use
2052 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
2055 gtk_container_set_focus_child (GtkContainer *container,
2058 g_return_if_fail (GTK_IS_CONTAINER (container));
2060 g_return_if_fail (GTK_IS_WIDGET (child));
2062 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
2066 * gtk_container_get_focus_child:
2067 * @container: a #GtkContainer
2069 * Returns the current focus child widget inside @container. This is not the
2070 * currently focused widget. That can be obtained by calling
2071 * gtk_window_get_focus().
2073 * Returns: (transfer none): The child widget which will receive the
2074 * focus inside @container when the @conatiner is focussed,
2075 * or %NULL if none is set.
2080 gtk_container_get_focus_child (GtkContainer *container)
2082 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2084 return container->priv->focus_child;
2088 * gtk_container_get_children:
2089 * @container: a #GtkContainer
2091 * Returns the container's non-internal children. See
2092 * gtk_container_forall() for details on what constitutes an "internal" child.
2094 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
2097 gtk_container_get_children (GtkContainer *container)
2099 GList *children = NULL;
2101 gtk_container_foreach (container,
2102 gtk_container_children_callback,
2105 return g_list_reverse (children);
2109 gtk_container_child_position_callback (GtkWidget *widget,
2110 gpointer client_data)
2116 } *data = client_data;
2119 if (data->child == widget)
2120 data->index = data->i;
2124 gtk_container_child_default_composite_name (GtkContainer *container,
2134 /* fallback implementation */
2138 gtk_container_forall (container,
2139 gtk_container_child_position_callback,
2142 name = g_strdup_printf ("%s-%u",
2143 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2150 _gtk_container_child_composite_name (GtkContainer *container,
2153 gboolean composite_child;
2155 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2156 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2157 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2159 g_object_get (child, "composite-child", &composite_child, NULL);
2160 if (composite_child)
2162 static GQuark quark_composite_name = 0;
2165 if (!quark_composite_name)
2166 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2168 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2171 GtkContainerClass *class;
2173 class = GTK_CONTAINER_GET_CLASS (container);
2174 if (class->composite_name)
2175 name = class->composite_name (container, child);
2178 name = g_strdup (name);
2189 } ComputeExpandData;
2192 gtk_container_compute_expand_callback (GtkWidget *widget,
2193 gpointer client_data)
2195 ComputeExpandData *data = client_data;
2197 /* note that we don't get_expand on the child if we already know we
2198 * have to expand, so we only recurse into children until we find
2199 * one that expands and then we basically don't do any more
2200 * work. This means that we can leave some children in a
2201 * need_compute_expand state, which is fine, as long as GtkWidget
2202 * doesn't rely on an invariant that "if a child has
2203 * need_compute_expand, its parents also do"
2205 * gtk_widget_compute_expand() always returns FALSE if the
2206 * child is !visible so that's taken care of.
2208 data->hexpand = data->hexpand ||
2209 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2211 data->vexpand = data->vexpand ||
2212 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2216 gtk_container_compute_expand (GtkWidget *widget,
2217 gboolean *hexpand_p,
2218 gboolean *vexpand_p)
2220 ComputeExpandData data;
2222 data.hexpand = FALSE;
2223 data.vexpand = FALSE;
2225 gtk_container_forall (GTK_CONTAINER (widget),
2226 gtk_container_compute_expand_callback,
2229 *hexpand_p = data.hexpand;
2230 *vexpand_p = data.vexpand;
2234 gtk_container_real_set_focus_child (GtkContainer *container,
2237 GtkContainerPrivate *priv;
2239 g_return_if_fail (GTK_IS_CONTAINER (container));
2240 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2242 priv = container->priv;
2244 if (child != priv->focus_child)
2246 if (priv->focus_child)
2247 g_object_unref (priv->focus_child);
2248 priv->focus_child = child;
2249 if (priv->focus_child)
2250 g_object_ref (priv->focus_child);
2254 /* check for h/v adjustments
2256 if (priv->focus_child)
2258 GtkAdjustment *hadj;
2259 GtkAdjustment *vadj;
2260 GtkAllocation allocation;
2261 GtkWidget *focus_child;
2264 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2265 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2269 focus_child = priv->focus_child;
2270 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2272 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2275 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2278 gtk_widget_get_allocation (priv->focus_child, &allocation);
2282 gtk_widget_get_allocation (focus_child, &allocation);
2285 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2288 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2294 get_focus_chain (GtkContainer *container)
2296 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2299 /* same as gtk_container_get_children, except it includes internals
2302 gtk_container_get_all_children (GtkContainer *container)
2304 GList *children = NULL;
2306 gtk_container_forall (container,
2307 gtk_container_children_callback,
2313 static GtkWidgetPath *
2314 gtk_container_real_get_path_for_child (GtkContainer *container,
2317 GtkStyleContext *context;
2318 GtkWidgetPath *path;
2321 context = gtk_widget_get_style_context (GTK_WIDGET (container));
2322 path = gtk_widget_path_copy (gtk_widget_get_path (GTK_WIDGET (container)));
2324 /* Copy any permanent classes to the path */
2325 classes = gtk_style_context_list_classes (context);
2332 classes = classes->next;
2334 gtk_widget_path_iter_add_class (path, -1, cur->data);
2335 g_list_free_1 (cur);
2338 gtk_widget_path_append_for_widget (path, child);
2344 gtk_container_focus (GtkWidget *widget,
2345 GtkDirectionType direction)
2348 GList *sorted_children;
2350 GtkContainer *container;
2351 GtkContainerPrivate *priv;
2353 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2355 container = GTK_CONTAINER (widget);
2356 priv = container->priv;
2360 if (gtk_widget_get_can_focus (widget))
2362 if (!gtk_widget_has_focus (widget))
2364 gtk_widget_grab_focus (widget);
2370 /* Get a list of the containers children, allowing focus
2371 * chain to override.
2373 if (priv->has_focus_chain)
2374 children = g_list_copy (get_focus_chain (container));
2376 children = gtk_container_get_all_children (container);
2378 if (priv->has_focus_chain &&
2379 (direction == GTK_DIR_TAB_FORWARD ||
2380 direction == GTK_DIR_TAB_BACKWARD))
2382 sorted_children = g_list_copy (children);
2384 if (direction == GTK_DIR_TAB_BACKWARD)
2385 sorted_children = g_list_reverse (sorted_children);
2388 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2390 return_val = gtk_container_focus_move (container, sorted_children, direction);
2392 g_list_free (sorted_children);
2393 g_list_free (children);
2400 tab_compare (gconstpointer a,
2404 GtkAllocation child1_allocation, child2_allocation;
2405 const GtkWidget *child1 = a;
2406 const GtkWidget *child2 = b;
2407 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2410 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2411 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2413 y1 = child1_allocation.y + child1_allocation.height / 2;
2414 y2 = child2_allocation.y + child2_allocation.height / 2;
2418 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2419 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2421 if (text_direction == GTK_TEXT_DIR_RTL)
2422 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2424 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2427 return (y1 < y2) ? -1 : 1;
2431 gtk_container_focus_sort_tab (GtkContainer *container,
2433 GtkDirectionType direction,
2434 GtkWidget *old_focus)
2436 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2437 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2439 /* if we are going backwards then reverse the order
2442 if (direction == GTK_DIR_TAB_BACKWARD)
2443 children = g_list_reverse (children);
2448 /* Get coordinates of @widget's allocation with respect to
2449 * allocation of @container.
2452 get_allocation_coords (GtkContainer *container,
2454 GdkRectangle *allocation)
2456 gtk_widget_get_allocation (widget, allocation);
2458 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2459 0, 0, &allocation->x, &allocation->y);
2462 /* Look for a child in @children that is intermediate between
2463 * the focus widget and container. This widget, if it exists,
2464 * acts as the starting widget for focus navigation.
2467 find_old_focus (GtkContainer *container,
2470 GList *tmp_list = children;
2473 GtkWidget *child = tmp_list->data;
2474 GtkWidget *widget = child;
2476 while (widget && widget != (GtkWidget *)container)
2480 parent = gtk_widget_get_parent (widget);
2482 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2491 tmp_list = tmp_list->next;
2498 old_focus_coords (GtkContainer *container,
2499 GdkRectangle *old_focus_rect)
2501 GtkWidget *widget = GTK_WIDGET (container);
2502 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2503 GtkWidget *old_focus;
2505 if (GTK_IS_WINDOW (toplevel))
2507 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2509 return get_allocation_coords (container, old_focus, old_focus_rect);
2515 typedef struct _CompareInfo CompareInfo;
2519 GtkContainer *container;
2526 up_down_compare (gconstpointer a,
2530 GdkRectangle allocation1;
2531 GdkRectangle allocation2;
2532 CompareInfo *compare = data;
2535 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2536 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2538 y1 = allocation1.y + allocation1.height / 2;
2539 y2 = allocation2.y + allocation2.height / 2;
2543 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2544 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2546 if (compare->reverse)
2547 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2549 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2552 return (y1 < y2) ? -1 : 1;
2556 gtk_container_focus_sort_up_down (GtkContainer *container,
2558 GtkDirectionType direction,
2559 GtkWidget *old_focus)
2561 CompareInfo compare;
2563 GdkRectangle old_allocation;
2565 compare.container = container;
2566 compare.reverse = (direction == GTK_DIR_UP);
2569 old_focus = find_old_focus (container, children);
2571 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2577 /* Delete widgets from list that don't match minimum criteria */
2579 compare_x1 = old_allocation.x;
2580 compare_x2 = old_allocation.x + old_allocation.width;
2582 if (direction == GTK_DIR_UP)
2583 compare_y = old_allocation.y;
2585 compare_y = old_allocation.y + old_allocation.height;
2587 tmp_list = children;
2590 GtkWidget *child = tmp_list->data;
2591 GList *next = tmp_list->next;
2592 gint child_x1, child_x2;
2593 GdkRectangle child_allocation;
2595 if (child != old_focus)
2597 if (get_allocation_coords (container, child, &child_allocation))
2599 child_x1 = child_allocation.x;
2600 child_x2 = child_allocation.x + child_allocation.width;
2602 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2603 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2604 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2606 children = g_list_delete_link (children, tmp_list);
2610 children = g_list_delete_link (children, tmp_list);
2616 compare.x = (compare_x1 + compare_x2) / 2;
2617 compare.y = old_allocation.y + old_allocation.height / 2;
2621 /* No old focus widget, need to figure out starting x,y some other way
2623 GtkAllocation allocation;
2624 GtkWidget *widget = GTK_WIDGET (container);
2625 GdkRectangle old_focus_rect;
2627 gtk_widget_get_allocation (widget, &allocation);
2629 if (old_focus_coords (container, &old_focus_rect))
2631 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2635 if (!gtk_widget_get_has_window (widget))
2636 compare.x = allocation.x + allocation.width / 2;
2638 compare.x = allocation.width / 2;
2641 if (!gtk_widget_get_has_window (widget))
2642 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2644 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2647 children = g_list_sort_with_data (children, up_down_compare, &compare);
2649 if (compare.reverse)
2650 children = g_list_reverse (children);
2656 left_right_compare (gconstpointer a,
2660 GdkRectangle allocation1;
2661 GdkRectangle allocation2;
2662 CompareInfo *compare = data;
2665 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2666 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2668 x1 = allocation1.x + allocation1.width / 2;
2669 x2 = allocation2.x + allocation2.width / 2;
2673 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2674 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2676 if (compare->reverse)
2677 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2679 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2682 return (x1 < x2) ? -1 : 1;
2686 gtk_container_focus_sort_left_right (GtkContainer *container,
2688 GtkDirectionType direction,
2689 GtkWidget *old_focus)
2691 CompareInfo compare;
2693 GdkRectangle old_allocation;
2695 compare.container = container;
2696 compare.reverse = (direction == GTK_DIR_LEFT);
2699 old_focus = find_old_focus (container, children);
2701 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2707 /* Delete widgets from list that don't match minimum criteria */
2709 compare_y1 = old_allocation.y;
2710 compare_y2 = old_allocation.y + old_allocation.height;
2712 if (direction == GTK_DIR_LEFT)
2713 compare_x = old_allocation.x;
2715 compare_x = old_allocation.x + old_allocation.width;
2717 tmp_list = children;
2720 GtkWidget *child = tmp_list->data;
2721 GList *next = tmp_list->next;
2722 gint child_y1, child_y2;
2723 GdkRectangle child_allocation;
2725 if (child != old_focus)
2727 if (get_allocation_coords (container, child, &child_allocation))
2729 child_y1 = child_allocation.y;
2730 child_y2 = child_allocation.y + child_allocation.height;
2732 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2733 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2734 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2736 children = g_list_delete_link (children, tmp_list);
2740 children = g_list_delete_link (children, tmp_list);
2746 compare.y = (compare_y1 + compare_y2) / 2;
2747 compare.x = old_allocation.x + old_allocation.width / 2;
2751 /* No old focus widget, need to figure out starting x,y some other way
2753 GtkAllocation allocation;
2754 GtkWidget *widget = GTK_WIDGET (container);
2755 GdkRectangle old_focus_rect;
2757 gtk_widget_get_allocation (widget, &allocation);
2759 if (old_focus_coords (container, &old_focus_rect))
2761 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2765 if (!gtk_widget_get_has_window (widget))
2766 compare.y = allocation.y + allocation.height / 2;
2768 compare.y = allocation.height / 2;
2771 if (!gtk_widget_get_has_window (widget))
2772 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2774 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2777 children = g_list_sort_with_data (children, left_right_compare, &compare);
2779 if (compare.reverse)
2780 children = g_list_reverse (children);
2786 * gtk_container_focus_sort:
2787 * @container: a #GtkContainer
2788 * @children: a list of descendents of @container (they don't
2789 * have to be direct children)
2790 * @direction: focus direction
2791 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2792 * to determine this automatically.
2793 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2794 * which is the only @direction we use currently,
2795 * so perhaps this argument should be removed)
2797 * Sorts @children in the correct order for focusing with
2798 * direction type @direction.
2800 * Return value: a copy of @children, sorted in correct focusing order,
2801 * with children that aren't suitable for focusing in this direction
2805 _gtk_container_focus_sort (GtkContainer *container,
2807 GtkDirectionType direction,
2808 GtkWidget *old_focus)
2810 GList *visible_children = NULL;
2814 if (gtk_widget_get_realized (children->data))
2815 visible_children = g_list_prepend (visible_children, children->data);
2816 children = children->next;
2821 case GTK_DIR_TAB_FORWARD:
2822 case GTK_DIR_TAB_BACKWARD:
2823 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2826 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2829 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2832 g_assert_not_reached ();
2838 gtk_container_focus_move (GtkContainer *container,
2840 GtkDirectionType direction)
2842 GtkContainerPrivate *priv = container->priv;
2843 GtkWidget *focus_child;
2846 focus_child = priv->focus_child;
2850 child = children->data;
2851 children = children->next;
2858 if (focus_child == child)
2862 if (gtk_widget_child_focus (child, direction))
2866 else if (gtk_widget_is_drawable (child) &&
2867 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2869 if (gtk_widget_child_focus (child, direction))
2879 gtk_container_children_callback (GtkWidget *widget,
2880 gpointer client_data)
2884 children = (GList**) client_data;
2885 *children = g_list_prepend (*children, widget);
2889 chain_widget_destroyed (GtkWidget *widget,
2892 GtkContainer *container;
2895 container = GTK_CONTAINER (user_data);
2897 chain = g_object_get_data (G_OBJECT (container),
2898 "gtk-container-focus-chain");
2900 chain = g_list_remove (chain, widget);
2902 g_signal_handlers_disconnect_by_func (widget,
2903 chain_widget_destroyed,
2906 g_object_set_data (G_OBJECT (container),
2907 I_("gtk-container-focus-chain"),
2912 * gtk_container_set_focus_chain:
2913 * @container: a #GtkContainer
2914 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2915 * the new focus chain
2917 * Sets a focus chain, overriding the one computed automatically by GTK+.
2919 * In principle each widget in the chain should be a descendant of the
2920 * container, but this is not enforced by this method, since it's allowed
2921 * to set the focus chain before you pack the widgets, or have a widget
2922 * in the chain that isn't always packed. The necessary checks are done
2923 * when the focus chain is actually traversed.
2926 gtk_container_set_focus_chain (GtkContainer *container,
2927 GList *focusable_widgets)
2931 GtkContainerPrivate *priv;
2933 g_return_if_fail (GTK_IS_CONTAINER (container));
2935 priv = container->priv;
2937 if (priv->has_focus_chain)
2938 gtk_container_unset_focus_chain (container);
2940 priv->has_focus_chain = TRUE;
2943 tmp_list = focusable_widgets;
2944 while (tmp_list != NULL)
2946 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2948 /* In principle each widget in the chain should be a descendant
2949 * of the container, but we don't want to check that here. It's
2950 * expensive and also it's allowed to set the focus chain before
2951 * you pack the widgets, or have a widget in the chain that isn't
2952 * always packed. So we check for ancestor during actual traversal.
2955 chain = g_list_prepend (chain, tmp_list->data);
2957 g_signal_connect (tmp_list->data,
2959 G_CALLBACK (chain_widget_destroyed),
2962 tmp_list = g_list_next (tmp_list);
2965 chain = g_list_reverse (chain);
2967 g_object_set_data (G_OBJECT (container),
2968 I_("gtk-container-focus-chain"),
2973 * gtk_container_get_focus_chain:
2974 * @container: a #GtkContainer
2975 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
2976 * to store the focus chain of the
2977 * container, or %NULL. You should free this list
2978 * using g_list_free() when you are done with it, however
2979 * no additional reference count is added to the
2980 * individual widgets in the focus chain.
2982 * Retrieves the focus chain of the container, if one has been
2983 * set explicitly. If no focus chain has been explicitly
2984 * set, GTK+ computes the focus chain based on the positions
2985 * of the children. In that case, GTK+ stores %NULL in
2986 * @focusable_widgets and returns %FALSE.
2988 * Return value: %TRUE if the focus chain of the container
2989 * has been set explicitly.
2992 gtk_container_get_focus_chain (GtkContainer *container,
2993 GList **focus_chain)
2995 GtkContainerPrivate *priv;
2997 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
2999 priv = container->priv;
3003 if (priv->has_focus_chain)
3004 *focus_chain = g_list_copy (get_focus_chain (container));
3006 *focus_chain = NULL;
3009 return priv->has_focus_chain;
3013 * gtk_container_unset_focus_chain:
3014 * @container: a #GtkContainer
3016 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
3019 gtk_container_unset_focus_chain (GtkContainer *container)
3021 GtkContainerPrivate *priv;
3023 g_return_if_fail (GTK_IS_CONTAINER (container));
3025 priv = container->priv;
3027 if (priv->has_focus_chain)
3032 chain = get_focus_chain (container);
3034 priv->has_focus_chain = FALSE;
3036 g_object_set_data (G_OBJECT (container),
3037 I_("gtk-container-focus-chain"),
3041 while (tmp_list != NULL)
3043 g_signal_handlers_disconnect_by_func (tmp_list->data,
3044 chain_widget_destroyed,
3047 tmp_list = g_list_next (tmp_list);
3050 g_list_free (chain);
3055 * gtk_container_set_focus_vadjustment:
3056 * @container: a #GtkContainer
3057 * @adjustment: an adjustment which should be adjusted when the focus
3058 * is moved among the descendents of @container
3060 * Hooks up an adjustment to focus handling in a container, so when a
3061 * child of the container is focused, the adjustment is scrolled to
3062 * show that widget. This function sets the vertical alignment. See
3063 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
3064 * the adjustment and gtk_container_set_focus_hadjustment() for setting
3065 * the horizontal adjustment.
3067 * The adjustments have to be in pixel units and in the same coordinate
3068 * system as the allocation for immediate children of the container.
3071 gtk_container_set_focus_vadjustment (GtkContainer *container,
3072 GtkAdjustment *adjustment)
3074 g_return_if_fail (GTK_IS_CONTAINER (container));
3076 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3079 g_object_ref (adjustment);
3081 g_object_set_qdata_full (G_OBJECT (container),
3088 * gtk_container_get_focus_vadjustment:
3089 * @container: a #GtkContainer
3091 * Retrieves the vertical focus adjustment for the container. See
3092 * gtk_container_set_focus_vadjustment().
3094 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
3095 * none has been set.
3098 gtk_container_get_focus_vadjustment (GtkContainer *container)
3100 GtkAdjustment *vadjustment;
3102 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3104 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
3110 * gtk_container_set_focus_hadjustment:
3111 * @container: a #GtkContainer
3112 * @adjustment: an adjustment which should be adjusted when the focus is
3113 * moved among the descendents of @container
3115 * Hooks up an adjustment to focus handling in a container, so when a child
3116 * of the container is focused, the adjustment is scrolled to show that
3117 * widget. This function sets the horizontal alignment.
3118 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
3119 * the adjustment and gtk_container_set_focus_vadjustment() for setting
3120 * the vertical adjustment.
3122 * The adjustments have to be in pixel units and in the same coordinate
3123 * system as the allocation for immediate children of the container.
3126 gtk_container_set_focus_hadjustment (GtkContainer *container,
3127 GtkAdjustment *adjustment)
3129 g_return_if_fail (GTK_IS_CONTAINER (container));
3131 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3134 g_object_ref (adjustment);
3136 g_object_set_qdata_full (G_OBJECT (container),
3143 * gtk_container_get_focus_hadjustment:
3144 * @container: a #GtkContainer
3146 * Retrieves the horizontal focus adjustment for the container. See
3147 * gtk_container_set_focus_hadjustment ().
3149 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3150 * none has been set.
3153 gtk_container_get_focus_hadjustment (GtkContainer *container)
3155 GtkAdjustment *hadjustment;
3157 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3159 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3166 gtk_container_show_all (GtkWidget *widget)
3168 g_return_if_fail (GTK_IS_CONTAINER (widget));
3170 gtk_container_foreach (GTK_CONTAINER (widget),
3171 (GtkCallback) gtk_widget_show_all,
3173 gtk_widget_show (widget);
3177 gtk_container_draw_child (GtkWidget *child,
3178 gpointer client_data)
3181 GtkWidget *container;
3183 } *data = client_data;
3185 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3191 gtk_container_draw (GtkWidget *widget,
3195 GtkWidget *container;
3199 data.container = widget;
3202 gtk_container_forall (GTK_CONTAINER (widget),
3203 gtk_container_draw_child,
3210 gtk_container_map_child (GtkWidget *child,
3211 gpointer client_data)
3213 if (gtk_widget_get_visible (child) &&
3214 gtk_widget_get_child_visible (child) &&
3215 !gtk_widget_get_mapped (child))
3216 gtk_widget_map (child);
3220 gtk_container_map (GtkWidget *widget)
3222 gtk_widget_set_mapped (widget, TRUE);
3224 gtk_container_forall (GTK_CONTAINER (widget),
3225 gtk_container_map_child,
3228 if (gtk_widget_get_has_window (widget))
3229 gdk_window_show (gtk_widget_get_window (widget));
3233 gtk_container_unmap (GtkWidget *widget)
3235 gtk_widget_set_mapped (widget, FALSE);
3237 /* hide our window first so user doesn't see all the child windows
3238 * vanishing one by one. (only matters these days if one of the
3239 * children has an actual native window instead of client-side
3240 * window, e.g. a GtkSocket would)
3242 if (gtk_widget_get_has_window (widget))
3243 gdk_window_hide (gtk_widget_get_window (widget));
3245 gtk_container_forall (GTK_CONTAINER (widget),
3246 (GtkCallback)gtk_widget_unmap,
3251 * gtk_container_propagate_draw:
3252 * @container: a #GtkContainer
3253 * @child: a child of @container
3254 * @cr: Cairo context as passed to the container. If you want to use @cr
3255 * in container's draw function, consider using cairo_save() and
3256 * cairo_restore() before calling this function.
3258 * When a container receives a call to the draw function, it must send
3259 * synthetic #GtkWidget::draw calls to all children that don't have their
3260 * own #GdkWindows. This function provides a convenient way of doing this.
3261 * A container, when it receives a call to its #GtkWidget::draw function,
3262 * calls gtk_container_propagate_draw() once for each child, passing in
3263 * the @cr the container received.
3265 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3266 * and deciding whether the draw needs to be sent to the child. It is a
3267 * convenient and optimized way of getting the same effect as calling
3268 * gtk_widget_draw() on the child directly.
3270 * In most cases, a container can simply either inherit the
3271 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3272 * and then chain to the ::draw implementation from #GtkContainer.
3275 gtk_container_propagate_draw (GtkContainer *container,
3279 GdkEventExpose *event;
3280 GtkAllocation allocation;
3281 GdkWindow *window, *w;
3284 g_return_if_fail (GTK_IS_CONTAINER (container));
3285 g_return_if_fail (GTK_IS_WIDGET (child));
3286 g_return_if_fail (cr != NULL);
3288 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3290 event = _gtk_cairo_get_event (cr);
3293 if (gtk_widget_get_has_window (child) ||
3294 gtk_widget_get_window (child) != event->window)
3300 /* translate coordinates. Ugly business, that. */
3301 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3303 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3313 window = gtk_widget_get_window (GTK_WIDGET (container));
3315 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3318 gdk_window_get_position (w, &wx, &wy);
3329 if (!gtk_widget_get_has_window (child))
3331 gtk_widget_get_allocation (child, &allocation);
3336 cairo_translate (cr, x, y);
3338 _gtk_widget_draw_internal (child, cr, TRUE);
3344 _gtk_container_get_need_resize (GtkContainer *container)
3346 return container->priv->need_resize;
3350 _gtk_container_set_need_resize (GtkContainer *container,
3351 gboolean need_resize)
3353 container->priv->need_resize = need_resize;
3357 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3359 return container->priv->reallocate_redraws;
3363 * gtk_container_get_path_for_child:
3364 * @container: a #GtkContainer
3365 * @child: a child of @container
3367 * Returns a newly created widget path representing all the widget hierarchy
3368 * from the toplevel down to and including @child.
3370 * Returns: A newly created #GtkWidgetPath
3373 gtk_container_get_path_for_child (GtkContainer *container,
3376 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3377 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
3378 g_return_val_if_fail (container == (GtkContainer *) gtk_widget_get_parent (child), NULL);
3380 return GTK_CONTAINER_GET_CLASS (container)->get_path_for_child (container, child);