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, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #include "gtkcontainer.h"
28 #include "gtkcontainerprivate.h"
34 #include <gobject/gobjectnotifyqueue.c>
35 #include <gobject/gvaluecollector.h>
37 #include "gtkadjustment.h"
38 #include "gtkbuildable.h"
39 #include "gtkbuilderprivate.h"
40 #include "gtktypebuiltins.h"
41 #include "gtkprivate.h"
43 #include "gtkmarshalers.h"
44 #include "gtksizerequest.h"
45 #include "gtksizerequestcacheprivate.h"
46 #include "gtkwidgetprivate.h"
47 #include "gtkwindow.h"
48 #include "gtkassistant.h"
50 #include "gtkstylecontextprivate.h"
51 #include "gtkwidgetpath.h"
52 #include "a11y/gtkcontaineraccessible.h"
55 * SECTION:gtkcontainer
56 * @Short_description: Base class for widgets which contain other widgets
57 * @Title: GtkContainer
59 * A GTK+ user interface is constructed by nesting widgets inside widgets.
60 * Container widgets are the inner nodes in the resulting tree of widgets:
61 * they contain other widgets. So, for example, you might have a #GtkWindow
62 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
63 * of a textual label inside the frame, you might replace the #GtkLabel widget
64 * with a #GtkImage widget.
66 * There are two major kinds of container widgets in GTK+. Both are subclasses
67 * of the abstract GtkContainer base class.
69 * The first type of container widget has a single child widget and derives
70 * from #GtkBin. These containers are <emphasis>decorators</emphasis>, which
71 * add some kind of functionality to the child. For example, a #GtkButton makes
72 * its child into a clickable button; a #GtkFrame draws a frame around its child
73 * and a #GtkWindow places its child widget inside a top-level window.
75 * The second type of container can have more than one child; its purpose is to
76 * manage <emphasis>layout</emphasis>. This means that these containers assign
77 * sizes and positions to their children. For example, a #GtkHBox arranges its
78 * children in a horizontal row, and a #GtkGrid arranges the widgets it contains
79 * in a two-dimensional grid.
81 * <refsect2 id="container-geometry-management">
82 * <title>Height for width geometry management</title>
84 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
85 * Height-for-width means that a widget can change how much vertical space it needs,
86 * depending on the amount of horizontal space that it is given (and similar for
89 * There are some things to keep in mind when implementing container widgets
90 * that make use of GTK+'s height for width geometry management system. First,
91 * it's important to note that a container must prioritize one of its
92 * dimensions, that is to say that a widget or container can only have a
93 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
94 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
95 * must be able to respond to the APIs for both dimensions, i.e. even if a
96 * widget has a request mode that is height-for-width, it is possible that
97 * its parent will request its sizes using the width-for-height APIs.
99 * To ensure that everything works properly, here are some guidelines to follow
100 * when implementing height-for-width (or width-for-height) containers.
102 * Each request mode involves 2 virtual methods. Height-for-width apis run
103 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
104 * When handling requests in the opposite #GtkSizeRequestMode it is important that
105 * every widget request at least enough space to display all of its content at all times.
107 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
108 * the container must return the height for its minimum width. This is easily achieved by
109 * simply calling the reverse apis implemented for itself as follows:
111 * <programlisting><![CDATA[
113 * foo_container_get_preferred_height (GtkWidget *widget, gint *min_height, gint *nat_height)
115 * if (i_am_in_height_for_width_mode)
119 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
120 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width,
121 * min_height, nat_height);
125 * ... many containers support both request modes, execute the real width-for-height
126 * request here by returning the collective heights of all widgets that are
127 * stacked vertically (or whatever is appropriate for this container) ...
130 * ]]></programlisting>
132 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
133 * that is height-for-width, it then only needs to return the base minimum width like so:
135 * <programlisting><![CDATA[
137 * foo_container_get_preferred_width_for_height (GtkWidget *widget, gint for_height,
138 * gint *min_width, gint *nat_width)
140 * if (i_am_in_height_for_width_mode)
142 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, min_width, nat_width);
146 * ... execute the real width-for-height request here based on the required width
147 * of the children collectively if the container were to be allocated the said height ...
150 * ]]></programlisting>
152 * Height for width requests are generally implemented in terms of a virtual allocation
153 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
154 * would implement the <function>get_preferred_height_for_width()</function> virtual function by first calling
155 * gtk_widget_get_preferred_width() for each of its children.
157 * For each potential group of children that are lined up horizontally, the values returned by
158 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures.
159 * Any child spacing should be removed from the input @for_width and then the collective size should be
160 * allocated using the gtk_distribute_natural_allocation() convenience function.
162 * The container will then move on to request the preferred height for each child by using
163 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
165 * To allocate a height-for-width container, it's again important
166 * to consider that a container must prioritize one dimension over the other. So if
167 * a container is a height-for-width container it must first allocate all widgets horizontally
168 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
169 * extra space (if and where appropriate) for the widget to expand.
171 * After adding all the expand space, the container assumes it was allocated sufficient
172 * height to fit all of its content. At this time, the container must use the total horizontal sizes
173 * of each widget to request the height-for-width of each of its children and store the requests in a
174 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
175 * be generalized into the heights and widths of rows and columns).
176 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
177 * while this time considering the allocated height of the widget minus any vertical spacing
178 * that the container adds. Then vertical expand space should be added where appropriate and available
179 * and the container should go on to actually allocating the child widgets.
181 * See <link linkend="geometry-management">GtkWidget's geometry management section</link>
182 * to learn more about implementing height-for-width geometry management for widgets.
185 * <refsect2 id="child-properties">
186 * <title>Child properties</title>
188 * GtkContainer introduces <emphasis>child properties</emphasis>.
189 * These are object properties that are not specific
190 * to either the container or the contained widget, but rather to their relation.
191 * Typical examples of child properties are the position or pack-type of a widget
192 * which is contained in a #GtkBox.
194 * Use gtk_container_class_install_child_property() to install child properties
195 * for a container class and gtk_container_class_find_child_property() or
196 * gtk_container_class_list_child_properties() to get information about existing
199 * To set the value of a child property, use gtk_container_child_set_property(),
200 * gtk_container_child_set() or gtk_container_child_set_valist().
201 * To obtain the value of a child property, use
202 * gtk_container_child_get_property(), gtk_container_child_get() or
203 * gtk_container_child_get_valist(). To emit notification about child property
204 * changes, use gtk_widget_child_notify().
207 * <refsect2 id="GtkContainer-BUILDER-UI">
208 * <title>GtkContainer as GtkBuildable</title>
210 * The GtkContainer implementation of the GtkBuildable interface
211 * supports a <packing> element for children, which can
212 * contain multiple <property> elements that specify
213 * child properties for the child.
215 * <title>Child properties in UI definitions</title>
216 * <programlisting><![CDATA[
217 * <object class="GtkVBox">
219 * <object class="GtkLabel"/>
221 * <property name="pack-type">start</property>
225 * ]]></programlisting>
227 * Since 2.16, child properties can also be marked as translatable using
228 * the same "translatable", "comments" and "context" attributes that are used
229 * for regular properties.
235 struct _GtkContainerPrivate
237 GtkWidget *focus_child;
239 guint border_width : 16;
241 guint has_focus_chain : 1;
242 guint reallocate_redraws : 1;
243 guint resize_pending : 1;
244 guint restyle_pending : 1;
245 guint resize_mode : 2;
246 guint request_mode : 2;
264 #define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
265 #define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
268 /* --- prototypes --- */
269 static void gtk_container_base_class_init (GtkContainerClass *klass);
270 static void gtk_container_base_class_finalize (GtkContainerClass *klass);
271 static void gtk_container_class_init (GtkContainerClass *klass);
272 static void gtk_container_init (GtkContainer *container);
273 static void gtk_container_destroy (GtkWidget *widget);
274 static void gtk_container_set_property (GObject *object,
278 static void gtk_container_get_property (GObject *object,
282 static void gtk_container_add_unimplemented (GtkContainer *container,
284 static void gtk_container_remove_unimplemented (GtkContainer *container,
286 static void gtk_container_real_check_resize (GtkContainer *container);
287 static void gtk_container_compute_expand (GtkWidget *widget,
289 gboolean *vexpand_p);
290 static gboolean gtk_container_focus (GtkWidget *widget,
291 GtkDirectionType direction);
292 static void gtk_container_real_set_focus_child (GtkContainer *container,
295 static gboolean gtk_container_focus_move (GtkContainer *container,
297 GtkDirectionType direction);
298 static void gtk_container_children_callback (GtkWidget *widget,
299 gpointer client_data);
300 static void gtk_container_show_all (GtkWidget *widget);
301 static gint gtk_container_draw (GtkWidget *widget,
303 static void gtk_container_map (GtkWidget *widget);
304 static void gtk_container_unmap (GtkWidget *widget);
305 static void gtk_container_adjust_size_request (GtkWidget *widget,
306 GtkOrientation orientation,
309 static void gtk_container_adjust_size_allocation (GtkWidget *widget,
310 GtkOrientation orientation,
314 gint *allocated_size);
315 static GtkSizeRequestMode gtk_container_get_request_mode (GtkWidget *widget);
317 static gchar* gtk_container_child_default_composite_name (GtkContainer *container,
320 static GtkWidgetPath * gtk_container_real_get_path_for_child (GtkContainer *container,
324 static void gtk_container_buildable_init (GtkBuildableIface *iface);
325 static void gtk_container_buildable_add_child (GtkBuildable *buildable,
329 static gboolean gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
332 const gchar *tagname,
333 GMarkupParser *parser,
335 static void gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
338 const gchar *tagname,
342 /* --- variables --- */
343 static const gchar vadjustment_key[] = "gtk-vadjustment";
344 static guint vadjustment_key_id = 0;
345 static const gchar hadjustment_key[] = "gtk-hadjustment";
346 static guint hadjustment_key_id = 0;
347 static GSList *container_resize_queue = NULL;
348 static GSList *container_restyle_queue = NULL;
349 static guint container_signals[LAST_SIGNAL] = { 0 };
350 static GtkWidgetClass *parent_class = NULL;
351 extern GParamSpecPool *_gtk_widget_child_property_pool;
352 extern GObjectNotifyContext *_gtk_widget_child_property_notify_context;
353 static GtkBuildableIface *parent_buildable_iface;
356 /* --- functions --- */
358 gtk_container_get_type (void)
360 static GType container_type = 0;
364 const GTypeInfo container_info =
366 sizeof (GtkContainerClass),
367 (GBaseInitFunc) gtk_container_base_class_init,
368 (GBaseFinalizeFunc) gtk_container_base_class_finalize,
369 (GClassInitFunc) gtk_container_class_init,
370 NULL /* class_finalize */,
371 NULL /* class_data */,
372 sizeof (GtkContainer),
374 (GInstanceInitFunc) gtk_container_init,
375 NULL, /* value_table */
378 const GInterfaceInfo buildable_info =
380 (GInterfaceInitFunc) gtk_container_buildable_init,
386 g_type_register_static (GTK_TYPE_WIDGET, I_("GtkContainer"),
387 &container_info, G_TYPE_FLAG_ABSTRACT);
389 g_type_add_interface_static (container_type,
395 return container_type;
399 gtk_container_base_class_init (GtkContainerClass *class)
401 /* reset instance specifc class fields that don't get inherited */
402 class->set_child_property = NULL;
403 class->get_child_property = NULL;
407 gtk_container_base_class_finalize (GtkContainerClass *class)
411 list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class));
412 for (node = list; node; node = node->next)
414 GParamSpec *pspec = node->data;
416 g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec);
417 PARAM_SPEC_SET_PARAM_ID (pspec, 0);
418 g_param_spec_unref (pspec);
424 gtk_container_class_init (GtkContainerClass *class)
426 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
427 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
429 parent_class = g_type_class_peek_parent (class);
431 vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
432 hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
434 gobject_class->set_property = gtk_container_set_property;
435 gobject_class->get_property = gtk_container_get_property;
437 widget_class->destroy = gtk_container_destroy;
438 widget_class->compute_expand = gtk_container_compute_expand;
439 widget_class->show_all = gtk_container_show_all;
440 widget_class->draw = gtk_container_draw;
441 widget_class->map = gtk_container_map;
442 widget_class->unmap = gtk_container_unmap;
443 widget_class->focus = gtk_container_focus;
445 widget_class->adjust_size_request = gtk_container_adjust_size_request;
446 widget_class->adjust_size_allocation = gtk_container_adjust_size_allocation;
447 widget_class->get_request_mode = gtk_container_get_request_mode;
449 class->add = gtk_container_add_unimplemented;
450 class->remove = gtk_container_remove_unimplemented;
451 class->check_resize = gtk_container_real_check_resize;
452 class->forall = NULL;
453 class->set_focus_child = gtk_container_real_set_focus_child;
454 class->child_type = NULL;
455 class->composite_name = gtk_container_child_default_composite_name;
456 class->get_path_for_child = gtk_container_real_get_path_for_child;
458 g_object_class_install_property (gobject_class,
460 g_param_spec_enum ("resize-mode",
462 P_("Specify how resize events are handled"),
463 GTK_TYPE_RESIZE_MODE,
465 GTK_PARAM_READWRITE));
466 g_object_class_install_property (gobject_class,
468 g_param_spec_uint ("border-width",
470 P_("The width of the empty border outside the containers children"),
474 GTK_PARAM_READWRITE));
475 g_object_class_install_property (gobject_class,
477 g_param_spec_object ("child",
479 P_("Can be used to add a new child to the container"),
481 GTK_PARAM_WRITABLE));
482 container_signals[ADD] =
483 g_signal_new (I_("add"),
484 G_OBJECT_CLASS_TYPE (gobject_class),
486 G_STRUCT_OFFSET (GtkContainerClass, add),
488 _gtk_marshal_VOID__OBJECT,
491 container_signals[REMOVE] =
492 g_signal_new (I_("remove"),
493 G_OBJECT_CLASS_TYPE (gobject_class),
495 G_STRUCT_OFFSET (GtkContainerClass, remove),
497 _gtk_marshal_VOID__OBJECT,
500 container_signals[CHECK_RESIZE] =
501 g_signal_new (I_("check-resize"),
502 G_OBJECT_CLASS_TYPE (gobject_class),
504 G_STRUCT_OFFSET (GtkContainerClass, check_resize),
506 _gtk_marshal_VOID__VOID,
508 container_signals[SET_FOCUS_CHILD] =
509 g_signal_new (I_("set-focus-child"),
510 G_OBJECT_CLASS_TYPE (gobject_class),
512 G_STRUCT_OFFSET (GtkContainerClass, set_focus_child),
514 _gtk_marshal_VOID__OBJECT,
518 g_type_class_add_private (class, sizeof (GtkContainerPrivate));
520 gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_CONTAINER_ACCESSIBLE);
524 gtk_container_buildable_init (GtkBuildableIface *iface)
526 parent_buildable_iface = g_type_interface_peek_parent (iface);
527 iface->add_child = gtk_container_buildable_add_child;
528 iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
529 iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
533 gtk_container_buildable_add_child (GtkBuildable *buildable,
540 GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
542 else if (GTK_IS_WIDGET (child) &&
543 gtk_widget_get_parent (GTK_WIDGET (child)) == NULL)
545 gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
548 g_warning ("Cannot add an object of type %s to a container of type %s",
549 g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
553 gtk_container_buildable_set_child_property (GtkContainer *container,
560 GValue gvalue = G_VALUE_INIT;
561 GError *error = NULL;
563 pspec = gtk_container_class_find_child_property
564 (G_OBJECT_GET_CLASS (container), name);
567 g_warning ("%s does not have a property called %s",
568 g_type_name (G_OBJECT_TYPE (container)), name);
572 if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
574 g_warning ("Could not read property %s:%s with value %s of type %s: %s",
575 g_type_name (G_OBJECT_TYPE (container)),
578 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
580 g_error_free (error);
584 gtk_container_child_set_property (container, child, name, &gvalue);
585 g_value_unset (&gvalue);
590 GtkContainer *container;
593 gchar *child_prop_name;
595 gboolean translatable;
596 } PackingPropertiesData;
599 attributes_start_element (GMarkupParseContext *context,
600 const gchar *element_name,
602 const gchar **values,
606 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
609 if (strcmp (element_name, "property") == 0)
611 for (i = 0; names[i]; i++)
612 if (strcmp (names[i], "name") == 0)
613 parser_data->child_prop_name = g_strdup (values[i]);
614 else if (strcmp (names[i], "translatable") == 0)
616 if (!_gtk_builder_boolean_from_string (values[1],
617 &parser_data->translatable,
621 else if (strcmp (names[i], "comments") == 0)
622 ; /* for translators */
623 else if (strcmp (names[i], "context") == 0)
624 parser_data->context = g_strdup (values[1]);
626 g_warning ("Unsupported attribute for GtkContainer Child "
627 "property: %s\n", names[i]);
629 else if (strcmp (element_name, "packing") == 0)
632 g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
636 attributes_text_element (GMarkupParseContext *context,
642 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
644 if (parser_data->child_prop_name)
645 g_string_append_len (parser_data->string, text, text_len);
649 attributes_end_element (GMarkupParseContext *context,
650 const gchar *element_name,
654 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
656 /* translate the string */
657 if (parser_data->string->len && parser_data->translatable)
662 domain = gtk_builder_get_translation_domain (parser_data->builder);
664 translated = _gtk_builder_parser_translate (domain,
665 parser_data->context,
666 parser_data->string->str);
667 g_string_set_size (parser_data->string, 0);
668 g_string_append (parser_data->string, translated);
671 if (parser_data->child_prop_name)
672 gtk_container_buildable_set_child_property (parser_data->container,
673 parser_data->builder,
675 parser_data->child_prop_name,
676 parser_data->string->str);
678 g_string_set_size (parser_data->string, 0);
679 g_free (parser_data->child_prop_name);
680 g_free (parser_data->context);
681 parser_data->child_prop_name = NULL;
682 parser_data->context = NULL;
683 parser_data->translatable = FALSE;
686 static const GMarkupParser attributes_parser =
688 attributes_start_element,
689 attributes_end_element,
690 attributes_text_element,
694 gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
697 const gchar *tagname,
698 GMarkupParser *parser,
701 PackingPropertiesData *parser_data;
703 if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
704 tagname, parser, data))
707 if (child && strcmp (tagname, "packing") == 0)
709 parser_data = g_slice_new0 (PackingPropertiesData);
710 parser_data->string = g_string_new ("");
711 parser_data->builder = builder;
712 parser_data->container = GTK_CONTAINER (buildable);
713 parser_data->child = GTK_WIDGET (child);
714 parser_data->child_prop_name = NULL;
716 *parser = attributes_parser;
725 gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
728 const gchar *tagname,
731 if (strcmp (tagname, "packing") == 0)
733 PackingPropertiesData *parser_data = (PackingPropertiesData*)data;
734 g_string_free (parser_data->string, TRUE);
735 g_slice_free (PackingPropertiesData, parser_data);
739 if (parent_buildable_iface->custom_tag_end)
740 parent_buildable_iface->custom_tag_end (buildable, builder,
741 child, tagname, data);
745 * gtk_container_child_type:
746 * @container: a #GtkContainer
748 * Returns the type of the children supported by the container.
750 * Note that this may return %G_TYPE_NONE to indicate that no more
751 * children can be added, e.g. for a #GtkPaned which already has two
754 * Return value: a #GType.
757 gtk_container_child_type (GtkContainer *container)
760 GtkContainerClass *class;
762 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
764 class = GTK_CONTAINER_GET_CLASS (container);
765 if (class->child_type)
766 slot = class->child_type (container);
773 /* --- GtkContainer child property mechanism --- */
776 * gtk_container_child_notify:
777 * @container: the #GtkContainer
778 * @child: the child widget
779 * @child_property: the name of a child property installed on
780 * the class of @container
782 * Emits a #GtkWidget::child-notify signal for the
783 * <link linkend="child-properties">child property</link>
784 * @child_property on widget.
786 * This is an analogue of g_object_notify() for child properties.
788 * Also see gtk_widget_child_notify().
793 gtk_container_child_notify (GtkContainer *container,
795 const gchar *child_property)
800 g_return_if_fail (GTK_IS_CONTAINER (container));
801 g_return_if_fail (GTK_IS_WIDGET (child));
802 g_return_if_fail (child_property != NULL);
804 obj = G_OBJECT (child);
806 if (obj->ref_count == 0)
811 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
813 G_OBJECT_TYPE (container),
818 g_warning ("%s: container class `%s' has no child property named `%s'",
820 G_OBJECT_TYPE_NAME (container),
825 GObjectNotifyQueue *nqueue;
827 nqueue = g_object_notify_queue_freeze (obj, _gtk_widget_child_property_notify_context);
829 g_object_notify_queue_add (obj, nqueue, pspec);
830 g_object_notify_queue_thaw (obj, nqueue);
833 g_object_unref (obj);
837 container_get_child_property (GtkContainer *container,
842 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
844 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
848 container_set_child_property (GtkContainer *container,
852 GObjectNotifyQueue *nqueue)
854 GValue tmp_value = G_VALUE_INIT;
855 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
857 /* provide a copy to work from, convert (if necessary) and validate */
858 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
859 if (!g_value_transform (value, &tmp_value))
860 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
862 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
863 G_VALUE_TYPE_NAME (value));
864 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
866 gchar *contents = g_strdup_value_contents (value);
868 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
870 G_VALUE_TYPE_NAME (value),
872 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
877 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
878 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
880 g_value_unset (&tmp_value);
884 * gtk_container_child_get_valist:
885 * @container: a #GtkContainer
886 * @child: a widget which is a child of @container
887 * @first_property_name: the name of the first property to get
888 * @var_args: return location for the first property, followed
889 * optionally by more name/return location pairs, followed by %NULL
891 * Gets the values of one or more child properties for @child and @container.
894 gtk_container_child_get_valist (GtkContainer *container,
896 const gchar *first_property_name,
901 g_return_if_fail (GTK_IS_CONTAINER (container));
902 g_return_if_fail (GTK_IS_WIDGET (child));
904 g_object_ref (container);
905 g_object_ref (child);
907 name = first_property_name;
910 GValue value = G_VALUE_INIT;
914 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
916 G_OBJECT_TYPE (container),
920 g_warning ("%s: container class `%s' has no child property named `%s'",
922 G_OBJECT_TYPE_NAME (container),
926 if (!(pspec->flags & G_PARAM_READABLE))
928 g_warning ("%s: child property `%s' of container class `%s' is not readable",
931 G_OBJECT_TYPE_NAME (container));
934 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
935 container_get_child_property (container, child, pspec, &value);
936 G_VALUE_LCOPY (&value, var_args, 0, &error);
939 g_warning ("%s: %s", G_STRLOC, error);
941 g_value_unset (&value);
944 g_value_unset (&value);
945 name = va_arg (var_args, gchar*);
948 g_object_unref (child);
949 g_object_unref (container);
953 * gtk_container_child_get_property:
954 * @container: a #GtkContainer
955 * @child: a widget which is a child of @container
956 * @property_name: the name of the property to get
957 * @value: a location to return the value
959 * Gets the value of a child property for @child and @container.
962 gtk_container_child_get_property (GtkContainer *container,
964 const gchar *property_name,
969 g_return_if_fail (GTK_IS_CONTAINER (container));
970 g_return_if_fail (GTK_IS_WIDGET (child));
971 g_return_if_fail (property_name != NULL);
972 g_return_if_fail (G_IS_VALUE (value));
974 g_object_ref (container);
975 g_object_ref (child);
976 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
977 G_OBJECT_TYPE (container), TRUE);
979 g_warning ("%s: container class `%s' has no child property named `%s'",
981 G_OBJECT_TYPE_NAME (container),
983 else if (!(pspec->flags & G_PARAM_READABLE))
984 g_warning ("%s: child property `%s' of container class `%s' is not readable",
987 G_OBJECT_TYPE_NAME (container));
990 GValue *prop_value, tmp_value = G_VALUE_INIT;
992 /* auto-conversion of the callers value type
994 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
996 g_value_reset (value);
999 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
1001 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
1003 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
1004 G_VALUE_TYPE_NAME (value));
1005 g_object_unref (child);
1006 g_object_unref (container);
1011 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
1012 prop_value = &tmp_value;
1014 container_get_child_property (container, child, pspec, prop_value);
1015 if (prop_value != value)
1017 g_value_transform (prop_value, value);
1018 g_value_unset (&tmp_value);
1021 g_object_unref (child);
1022 g_object_unref (container);
1026 * gtk_container_child_set_valist:
1027 * @container: a #GtkContainer
1028 * @child: a widget which is a child of @container
1029 * @first_property_name: the name of the first property to set
1030 * @var_args: a %NULL-terminated list of property names and values, starting
1031 * with @first_prop_name
1033 * Sets one or more child properties for @child and @container.
1036 gtk_container_child_set_valist (GtkContainer *container,
1038 const gchar *first_property_name,
1041 GObjectNotifyQueue *nqueue;
1044 g_return_if_fail (GTK_IS_CONTAINER (container));
1045 g_return_if_fail (GTK_IS_WIDGET (child));
1047 g_object_ref (container);
1048 g_object_ref (child);
1050 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1051 name = first_property_name;
1054 GValue value = G_VALUE_INIT;
1055 gchar *error = NULL;
1056 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1058 G_OBJECT_TYPE (container),
1062 g_warning ("%s: container class `%s' has no child property named `%s'",
1064 G_OBJECT_TYPE_NAME (container),
1068 if (!(pspec->flags & G_PARAM_WRITABLE))
1070 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1073 G_OBJECT_TYPE_NAME (container));
1077 G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
1078 var_args, 0, &error);
1081 g_warning ("%s: %s", G_STRLOC, error);
1084 /* we purposely leak the value here, it might not be
1085 * in a sane state if an error condition occoured
1089 container_set_child_property (container, child, pspec, &value, nqueue);
1090 g_value_unset (&value);
1091 name = va_arg (var_args, gchar*);
1093 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1095 g_object_unref (container);
1096 g_object_unref (child);
1100 * gtk_container_child_set_property:
1101 * @container: a #GtkContainer
1102 * @child: a widget which is a child of @container
1103 * @property_name: the name of the property to set
1104 * @value: the value to set the property to
1106 * Sets a child property for @child and @container.
1109 gtk_container_child_set_property (GtkContainer *container,
1111 const gchar *property_name,
1112 const GValue *value)
1114 GObjectNotifyQueue *nqueue;
1117 g_return_if_fail (GTK_IS_CONTAINER (container));
1118 g_return_if_fail (GTK_IS_WIDGET (child));
1119 g_return_if_fail (property_name != NULL);
1120 g_return_if_fail (G_IS_VALUE (value));
1122 g_object_ref (container);
1123 g_object_ref (child);
1125 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1126 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1127 G_OBJECT_TYPE (container), TRUE);
1129 g_warning ("%s: container class `%s' has no child property named `%s'",
1131 G_OBJECT_TYPE_NAME (container),
1133 else if (!(pspec->flags & G_PARAM_WRITABLE))
1134 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1137 G_OBJECT_TYPE_NAME (container));
1140 container_set_child_property (container, child, pspec, value, nqueue);
1142 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1143 g_object_unref (container);
1144 g_object_unref (child);
1148 * gtk_container_add_with_properties:
1149 * @container: a #GtkContainer
1150 * @widget: a widget to be placed inside @container
1151 * @first_prop_name: the name of the first child property to set
1152 * @...: a %NULL-terminated list of property names and values, starting
1153 * with @first_prop_name
1155 * Adds @widget to @container, setting child properties at the same time.
1156 * See gtk_container_add() and gtk_container_child_set() for more details.
1159 gtk_container_add_with_properties (GtkContainer *container,
1161 const gchar *first_prop_name,
1164 g_return_if_fail (GTK_IS_CONTAINER (container));
1165 g_return_if_fail (GTK_IS_WIDGET (widget));
1166 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1168 g_object_ref (container);
1169 g_object_ref (widget);
1170 gtk_widget_freeze_child_notify (widget);
1172 g_signal_emit (container, container_signals[ADD], 0, widget);
1173 if (gtk_widget_get_parent (widget))
1177 va_start (var_args, first_prop_name);
1178 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1182 gtk_widget_thaw_child_notify (widget);
1183 g_object_unref (widget);
1184 g_object_unref (container);
1188 * gtk_container_child_set:
1189 * @container: a #GtkContainer
1190 * @child: a widget which is a child of @container
1191 * @first_prop_name: the name of the first property to set
1192 * @...: a %NULL-terminated list of property names and values, starting
1193 * with @first_prop_name
1195 * Sets one or more child properties for @child and @container.
1198 gtk_container_child_set (GtkContainer *container,
1200 const gchar *first_prop_name,
1205 va_start (var_args, first_prop_name);
1206 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1211 * gtk_container_child_get:
1212 * @container: a #GtkContainer
1213 * @child: a widget which is a child of @container
1214 * @first_prop_name: the name of the first property to get
1215 * @...: return location for the first property, followed
1216 * optionally by more name/return location pairs, followed by %NULL
1218 * Gets the values of one or more child properties for @child and @container.
1221 gtk_container_child_get (GtkContainer *container,
1223 const gchar *first_prop_name,
1228 va_start (var_args, first_prop_name);
1229 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1234 * gtk_container_class_install_child_property:
1235 * @cclass: a #GtkContainerClass
1236 * @property_id: the id for the property
1237 * @pspec: the #GParamSpec for the property
1239 * Installs a child property on a container class.
1242 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1246 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1247 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1248 if (pspec->flags & G_PARAM_WRITABLE)
1249 g_return_if_fail (cclass->set_child_property != NULL);
1250 if (pspec->flags & G_PARAM_READABLE)
1251 g_return_if_fail (cclass->get_child_property != NULL);
1252 g_return_if_fail (property_id > 0);
1253 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1254 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1255 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1257 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1259 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1260 G_OBJECT_CLASS_NAME (cclass),
1264 g_param_spec_ref (pspec);
1265 g_param_spec_sink (pspec);
1266 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1267 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1271 * gtk_container_class_find_child_property:
1272 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1273 * @property_name: the name of the child property to find
1275 * Finds a child property of a container class by name.
1277 * Returns: (transfer none): the #GParamSpec of the child property
1278 * or %NULL if @class has no child property with that name.
1281 gtk_container_class_find_child_property (GObjectClass *cclass,
1282 const gchar *property_name)
1284 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1285 g_return_val_if_fail (property_name != NULL, NULL);
1287 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1289 G_OBJECT_CLASS_TYPE (cclass),
1294 * gtk_container_class_list_child_properties:
1295 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1296 * @n_properties: location to return the number of child properties found
1298 * Returns all child properties of a container class.
1300 * Returns: (array length=n_properties) (transfer container):
1301 * a newly allocated %NULL-terminated array of #GParamSpec*.
1302 * The array must be freed with g_free().
1305 gtk_container_class_list_child_properties (GObjectClass *cclass,
1306 guint *n_properties)
1308 GParamSpec **pspecs;
1311 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1313 pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
1314 G_OBJECT_CLASS_TYPE (cclass),
1323 gtk_container_add_unimplemented (GtkContainer *container,
1326 g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1330 gtk_container_remove_unimplemented (GtkContainer *container,
1333 g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1337 gtk_container_init (GtkContainer *container)
1339 GtkContainerPrivate *priv;
1341 container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
1343 GtkContainerPrivate);
1344 priv = container->priv;
1346 priv->focus_child = NULL;
1347 priv->border_width = 0;
1348 priv->resize_mode = GTK_RESIZE_PARENT;
1349 priv->reallocate_redraws = FALSE;
1353 gtk_container_destroy (GtkWidget *widget)
1355 GtkContainer *container = GTK_CONTAINER (widget);
1356 GtkContainerPrivate *priv = container->priv;
1358 if (priv->resize_pending)
1359 _gtk_container_dequeue_resize_handler (container);
1360 if (priv->restyle_pending)
1362 container_restyle_queue = g_slist_remove (container_restyle_queue, container);
1363 priv->restyle_pending = FALSE;
1366 if (priv->focus_child)
1368 g_object_unref (priv->focus_child);
1369 priv->focus_child = NULL;
1372 /* do this before walking child widgets, to avoid
1373 * removing children from focus chain one by one.
1375 if (priv->has_focus_chain)
1376 gtk_container_unset_focus_chain (container);
1378 gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
1380 GTK_WIDGET_CLASS (parent_class)->destroy (widget);
1384 gtk_container_set_property (GObject *object,
1386 const GValue *value,
1389 GtkContainer *container = GTK_CONTAINER (object);
1393 case PROP_BORDER_WIDTH:
1394 gtk_container_set_border_width (container, g_value_get_uint (value));
1396 case PROP_RESIZE_MODE:
1397 gtk_container_set_resize_mode (container, g_value_get_enum (value));
1400 gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
1403 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1409 gtk_container_get_property (GObject *object,
1414 GtkContainer *container = GTK_CONTAINER (object);
1415 GtkContainerPrivate *priv = container->priv;
1419 case PROP_BORDER_WIDTH:
1420 g_value_set_uint (value, priv->border_width);
1422 case PROP_RESIZE_MODE:
1423 g_value_set_enum (value, priv->resize_mode);
1426 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1432 * gtk_container_set_border_width:
1433 * @container: a #GtkContainer
1434 * @border_width: amount of blank space to leave <emphasis>outside</emphasis>
1435 * the container. Valid values are in the range 0-65535 pixels.
1437 * Sets the border width of the container.
1439 * The border width of a container is the amount of space to leave
1440 * around the outside of the container. The only exception to this is
1441 * #GtkWindow; because toplevel windows can't leave space outside,
1442 * they leave the space inside. The border is added on all sides of
1443 * the container. To add space to only one side, one approach is to
1444 * create a #GtkAlignment widget, call gtk_widget_set_size_request()
1445 * to give it a size, and place it on the side of the container as
1449 gtk_container_set_border_width (GtkContainer *container,
1452 GtkContainerPrivate *priv;
1454 g_return_if_fail (GTK_IS_CONTAINER (container));
1456 priv = container->priv;
1458 if (priv->border_width != border_width)
1460 priv->border_width = border_width;
1461 g_object_notify (G_OBJECT (container), "border-width");
1463 if (gtk_widget_get_realized (GTK_WIDGET (container)))
1464 gtk_widget_queue_resize (GTK_WIDGET (container));
1469 * gtk_container_get_border_width:
1470 * @container: a #GtkContainer
1472 * Retrieves the border width of the container. See
1473 * gtk_container_set_border_width().
1475 * Return value: the current border width
1478 gtk_container_get_border_width (GtkContainer *container)
1480 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
1482 return container->priv->border_width;
1486 * gtk_container_add:
1487 * @container: a #GtkContainer
1488 * @widget: a widget to be placed inside @container
1490 * Adds @widget to @container. Typically used for simple containers
1491 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
1492 * layout containers such as #GtkBox or #GtkGrid, this function will
1493 * pick default packing parameters that may not be correct. So
1494 * consider functions such as gtk_box_pack_start() and
1495 * gtk_grid_attach() as an alternative to gtk_container_add() in
1496 * those cases. A widget may be added to only one container at a time;
1497 * you can't place the same widget inside two different containers.
1500 gtk_container_add (GtkContainer *container,
1505 g_return_if_fail (GTK_IS_CONTAINER (container));
1506 g_return_if_fail (GTK_IS_WIDGET (widget));
1508 parent = gtk_widget_get_parent (widget);
1512 g_warning ("Attempting to add a widget with type %s to a container of "
1513 "type %s, but the widget is already inside a container of type %s, "
1514 "please use gtk_widget_reparent()" ,
1515 g_type_name (G_OBJECT_TYPE (widget)),
1516 g_type_name (G_OBJECT_TYPE (container)),
1517 g_type_name (G_OBJECT_TYPE (parent)));
1521 g_signal_emit (container, container_signals[ADD], 0, widget);
1525 * gtk_container_remove:
1526 * @container: a #GtkContainer
1527 * @widget: a current child of @container
1529 * Removes @widget from @container. @widget must be inside @container.
1530 * Note that @container will own a reference to @widget, and that this
1531 * may be the last reference held; so removing a widget from its
1532 * container can destroy that widget. If you want to use @widget
1533 * again, you need to add a reference to it while it's not inside
1534 * a container, using g_object_ref(). If you don't want to use @widget
1535 * again it's usually more efficient to simply destroy it directly
1536 * using gtk_widget_destroy() since this will remove it from the
1537 * container and help break any circular reference count cycles.
1540 gtk_container_remove (GtkContainer *container,
1543 g_return_if_fail (GTK_IS_CONTAINER (container));
1544 g_return_if_fail (GTK_IS_WIDGET (widget));
1545 g_return_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (container) || GTK_IS_ASSISTANT (container));
1547 g_signal_emit (container, container_signals[REMOVE], 0, widget);
1551 _gtk_container_dequeue_resize_handler (GtkContainer *container)
1553 g_return_if_fail (GTK_IS_CONTAINER (container));
1554 g_return_if_fail (container->priv->resize_pending);
1556 container_resize_queue = g_slist_remove (container_resize_queue, container);
1557 container->priv->resize_pending = FALSE;
1561 * gtk_container_set_resize_mode:
1562 * @container: a #GtkContainer
1563 * @resize_mode: the new resize mode
1565 * Sets the resize mode for the container.
1567 * The resize mode of a container determines whether a resize request
1568 * will be passed to the container's parent, queued for later execution
1569 * or executed immediately.
1572 gtk_container_set_resize_mode (GtkContainer *container,
1573 GtkResizeMode resize_mode)
1575 GtkContainerPrivate *priv;
1577 g_return_if_fail (GTK_IS_CONTAINER (container));
1578 g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
1580 priv = container->priv;
1582 if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
1583 resize_mode == GTK_RESIZE_PARENT)
1585 resize_mode = GTK_RESIZE_QUEUE;
1588 if (priv->resize_mode != resize_mode)
1590 priv->resize_mode = resize_mode;
1592 gtk_widget_queue_resize (GTK_WIDGET (container));
1593 g_object_notify (G_OBJECT (container), "resize-mode");
1598 * gtk_container_get_resize_mode:
1599 * @container: a #GtkContainer
1601 * Returns the resize mode for the container. See
1602 * gtk_container_set_resize_mode ().
1604 * Return value: the current resize mode
1607 gtk_container_get_resize_mode (GtkContainer *container)
1609 g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
1611 return container->priv->resize_mode;
1615 * gtk_container_set_reallocate_redraws:
1616 * @container: a #GtkContainer
1617 * @needs_redraws: the new value for the container's @reallocate_redraws flag
1619 * Sets the @reallocate_redraws flag of the container to the given value.
1621 * Containers requesting reallocation redraws get automatically
1622 * redrawn if any of their children changed allocation.
1625 gtk_container_set_reallocate_redraws (GtkContainer *container,
1626 gboolean needs_redraws)
1628 g_return_if_fail (GTK_IS_CONTAINER (container));
1630 container->priv->reallocate_redraws = needs_redraws ? TRUE : FALSE;
1634 gtk_container_idle_sizer (gpointer data)
1637 gint64 current_time;
1639 /* We validate the style contexts in a single loop before even trying
1640 * to handle resizes instead of doing validations inline.
1641 * This is mostly necessary for compatibility reasons with old code,
1642 * because both style_updated and size_allocate functions often change
1643 * styles and so could cause infinite loops in this function.
1645 * It's important to note that even an invalid style context returns
1646 * sane values. So the result of an invalid style context will never be
1647 * a program crash, but only a wrong layout or rendering.
1649 current_time = g_get_monotonic_time ();
1650 slist = container_restyle_queue;
1651 container_restyle_queue = NULL;
1654 GSList *next = slist->next;
1655 GtkContainer *container = slist->data;
1658 empty = _gtk_bitmask_new ();
1660 container->priv->restyle_pending = FALSE;
1661 _gtk_style_context_validate (gtk_widget_get_style_context (GTK_WIDGET (container)),
1666 g_slist_free_1 (slist);
1668 _gtk_bitmask_free (empty);
1671 /* we may be invoked with a container_resize_queue of NULL, because
1672 * queue_resize could have been adding an extra idle function while
1673 * the queue still got processed. we better just ignore such case
1674 * than trying to explicitely work around them with some extra flags,
1675 * since it doesn't cause any actual harm.
1677 while (container_resize_queue)
1679 GtkContainer *container;
1681 slist = container_resize_queue;
1682 container_resize_queue = slist->next;
1683 container = slist->data;
1684 g_slist_free_1 (slist);
1686 container->priv->resize_pending = FALSE;
1687 gtk_container_check_resize (container);
1690 gdk_window_process_all_updates ();
1692 return container_resize_queue != NULL || container_restyle_queue != NULL;
1696 gtk_container_start_idle_sizer (GtkContainer *container)
1698 /* already started */
1699 if (container_resize_queue != NULL ||
1700 container_restyle_queue != NULL)
1703 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1704 gtk_container_idle_sizer,
1709 gtk_container_queue_resize_handler (GtkContainer *container)
1713 g_return_if_fail (GTK_IS_RESIZE_CONTAINER (container));
1715 widget = GTK_WIDGET (container);
1717 if (gtk_widget_get_visible (widget) &&
1718 (gtk_widget_is_toplevel (widget) ||
1719 gtk_widget_get_realized (widget)))
1721 switch (container->priv->resize_mode)
1723 case GTK_RESIZE_QUEUE:
1724 if (!container->priv->resize_pending)
1726 container->priv->resize_pending = TRUE;
1727 gtk_container_start_idle_sizer (container);
1728 container_resize_queue = g_slist_prepend (container_resize_queue, container);
1732 case GTK_RESIZE_IMMEDIATE:
1733 gtk_container_check_resize (container);
1736 case GTK_RESIZE_PARENT:
1738 g_assert_not_reached ();
1745 _gtk_container_queue_resize_internal (GtkContainer *container,
1746 gboolean invalidate_only)
1750 g_return_if_fail (GTK_IS_CONTAINER (container));
1752 widget = GTK_WIDGET (container);
1756 _gtk_widget_set_alloc_needed (widget, TRUE);
1757 _gtk_size_request_cache_clear (_gtk_widget_peek_request_cache (widget));
1759 if (GTK_IS_RESIZE_CONTAINER (widget))
1762 widget = gtk_widget_get_parent (widget);
1766 if (widget && !invalidate_only)
1767 gtk_container_queue_resize_handler (GTK_CONTAINER (widget));
1771 _gtk_container_queue_restyle (GtkContainer *container)
1773 GtkContainerPrivate *priv;
1775 g_return_if_fail (GTK_CONTAINER (container));
1777 priv = container->priv;
1779 if (priv->restyle_pending)
1782 gtk_container_start_idle_sizer (container);
1784 container_restyle_queue = g_slist_prepend (container_restyle_queue, container);
1785 priv->restyle_pending = TRUE;
1789 * _gtk_container_queue_resize:
1790 * @container: a #GtkContainer
1792 * Determines the "resize container" in the hierarchy above this container
1793 * (typically the toplevel, but other containers can be set as resize
1794 * containers with gtk_container_set_resize_mode()), marks the container
1795 * and all parents up to and including the resize container as needing
1796 * to have sizes recompted, and if necessary adds the resize container
1797 * to the queue of containers that will be resized out at idle.
1800 _gtk_container_queue_resize (GtkContainer *container)
1802 _gtk_container_queue_resize_internal (container, FALSE);
1806 * _gtk_container_resize_invalidate:
1807 * @container: a #GtkContainer
1809 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1810 * actually queue the resize container for resize.
1813 _gtk_container_resize_invalidate (GtkContainer *container)
1815 _gtk_container_queue_resize_internal (container, TRUE);
1819 gtk_container_check_resize (GtkContainer *container)
1821 g_return_if_fail (GTK_IS_CONTAINER (container));
1823 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1827 gtk_container_real_check_resize (GtkContainer *container)
1829 GtkWidget *widget = GTK_WIDGET (container);
1830 GtkAllocation allocation;
1831 GtkRequisition requisition;
1833 gtk_widget_get_preferred_size (widget,
1834 &requisition, NULL);
1835 gtk_widget_get_allocation (widget, &allocation);
1837 if (requisition.width > allocation.width ||
1838 requisition.height > allocation.height)
1840 if (GTK_IS_RESIZE_CONTAINER (container))
1842 gtk_widget_size_allocate (widget, &allocation);
1843 gtk_widget_set_allocation (widget, &allocation);
1846 gtk_widget_queue_resize (widget);
1850 gtk_container_resize_children (container);
1854 /* The container hasn't changed size but one of its children
1855 * queued a resize request. Which means that the allocation
1856 * is not sufficient for the requisition of some child.
1857 * We've already performed a size request at this point,
1858 * so we simply need to reallocate and let the allocation
1859 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1862 gtk_container_resize_children (GtkContainer *container)
1864 GtkAllocation allocation;
1867 /* resizing invariants:
1868 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1869 * containers that have an idle sizer pending must be flagged with
1872 g_return_if_fail (GTK_IS_CONTAINER (container));
1874 widget = GTK_WIDGET (container);
1875 gtk_widget_get_allocation (widget, &allocation);
1877 gtk_widget_size_allocate (widget, &allocation);
1878 gtk_widget_set_allocation (widget, &allocation);
1882 gtk_container_adjust_size_request (GtkWidget *widget,
1883 GtkOrientation orientation,
1887 GtkContainer *container;
1889 container = GTK_CONTAINER (widget);
1891 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1895 border_width = container->priv->border_width;
1897 *minimum_size += border_width * 2;
1898 *natural_size += border_width * 2;
1901 /* chain up last so gtk_widget_set_size_request() values
1902 * will have a chance to overwrite our border width.
1904 parent_class->adjust_size_request (widget, orientation,
1905 minimum_size, natural_size);
1909 gtk_container_adjust_size_allocation (GtkWidget *widget,
1910 GtkOrientation orientation,
1913 gint *allocated_pos,
1914 gint *allocated_size)
1916 GtkContainer *container;
1919 container = GTK_CONTAINER (widget);
1921 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1923 border_width = container->priv->border_width;
1925 *allocated_size -= border_width * 2;
1926 *allocated_pos += border_width;
1927 *minimum_size -= border_width * 2;
1928 *natural_size -= border_width * 2;
1931 /* Chain up to GtkWidgetClass *after* removing our border width from
1932 * the proposed allocation size. This is because it's possible that the
1933 * widget was allocated more space than it needs in a said orientation,
1934 * if GtkWidgetClass does any alignments and thus limits the size to the
1935 * natural size... then we need that to be done *after* removing any margins
1936 * and padding values.
1938 parent_class->adjust_size_allocation (widget, orientation,
1939 minimum_size, natural_size, allocated_pos,
1949 count_request_modes (GtkWidget *widget,
1950 RequestModeCount *count)
1952 GtkSizeRequestMode mode = gtk_widget_get_request_mode (widget);
1956 case GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH:
1959 case GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT:
1962 case GTK_SIZE_REQUEST_CONSTANT_SIZE:
1968 static GtkSizeRequestMode
1969 gtk_container_get_request_mode (GtkWidget *widget)
1971 GtkContainer *container = GTK_CONTAINER (widget);
1972 RequestModeCount count = { 0, 0 };
1974 gtk_container_forall (container, (GtkCallback)count_request_modes, &count);
1976 if (!count.hfw && !count.wfh)
1977 return GTK_SIZE_REQUEST_CONSTANT_SIZE;
1979 return count.wfh > count.hfw ?
1980 GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT :
1981 GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1985 * gtk_container_class_handle_border_width:
1986 * @klass: the class struct of a #GtkContainer subclass
1988 * Modifies a subclass of #GtkContainerClass to automatically add and
1989 * remove the border-width setting on GtkContainer. This allows the
1990 * subclass to ignore the border width in its size request and
1991 * allocate methods. The intent is for a subclass to invoke this
1992 * in its class_init function.
1994 * gtk_container_class_handle_border_width() is necessary because it
1995 * would break API too badly to make this behavior the default. So
1996 * subclasses must "opt in" to the parent class handling border_width
2000 gtk_container_class_handle_border_width (GtkContainerClass *klass)
2002 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
2004 klass->_handle_border_width = TRUE;
2008 * gtk_container_forall:
2009 * @container: a #GtkContainer
2010 * @callback: (scope call) (closure callback_data): a callback
2011 * @callback_data: callback user data
2013 * Invokes @callback on each child of @container, including children
2014 * that are considered "internal" (implementation details of the
2015 * container). "Internal" children generally weren't added by the user
2016 * of the container, but were added by the container implementation
2017 * itself. Most applications should use gtk_container_foreach(),
2018 * rather than gtk_container_forall().
2023 gtk_container_forall (GtkContainer *container,
2024 GtkCallback callback,
2025 gpointer callback_data)
2027 GtkContainerClass *class;
2029 g_return_if_fail (GTK_IS_CONTAINER (container));
2030 g_return_if_fail (callback != NULL);
2032 class = GTK_CONTAINER_GET_CLASS (container);
2035 class->forall (container, TRUE, callback, callback_data);
2039 * gtk_container_foreach:
2040 * @container: a #GtkContainer
2041 * @callback: (scope call): a callback
2042 * @callback_data: callback user data
2044 * Invokes @callback on each non-internal child of @container. See
2045 * gtk_container_forall() for details on what constitutes an
2046 * "internal" child. Most applications should use
2047 * gtk_container_foreach(), rather than gtk_container_forall().
2050 gtk_container_foreach (GtkContainer *container,
2051 GtkCallback callback,
2052 gpointer callback_data)
2054 GtkContainerClass *class;
2056 g_return_if_fail (GTK_IS_CONTAINER (container));
2057 g_return_if_fail (callback != NULL);
2059 class = GTK_CONTAINER_GET_CLASS (container);
2062 class->forall (container, FALSE, callback, callback_data);
2066 * gtk_container_set_focus_child:
2067 * @container: a #GtkContainer
2068 * @child: (allow-none): a #GtkWidget, or %NULL
2070 * Sets, or unsets if @child is %NULL, the focused child of @container.
2072 * This function emits the GtkContainer::set_focus_child signal of
2073 * @container. Implementations of #GtkContainer can override the
2074 * default behaviour by overriding the class closure of this signal.
2076 * This is function is mostly meant to be used by widgets. Applications can use
2077 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
2080 gtk_container_set_focus_child (GtkContainer *container,
2083 g_return_if_fail (GTK_IS_CONTAINER (container));
2085 g_return_if_fail (GTK_IS_WIDGET (child));
2087 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
2091 * gtk_container_get_focus_child:
2092 * @container: a #GtkContainer
2094 * Returns the current focus child widget inside @container. This is not the
2095 * currently focused widget. That can be obtained by calling
2096 * gtk_window_get_focus().
2098 * Returns: (transfer none): The child widget which will receive the
2099 * focus inside @container when the @conatiner is focussed,
2100 * or %NULL if none is set.
2105 gtk_container_get_focus_child (GtkContainer *container)
2107 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2109 return container->priv->focus_child;
2113 * gtk_container_get_children:
2114 * @container: a #GtkContainer
2116 * Returns the container's non-internal children. See
2117 * gtk_container_forall() for details on what constitutes an "internal" child.
2119 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
2122 gtk_container_get_children (GtkContainer *container)
2124 GList *children = NULL;
2126 gtk_container_foreach (container,
2127 gtk_container_children_callback,
2130 return g_list_reverse (children);
2134 gtk_container_child_position_callback (GtkWidget *widget,
2135 gpointer client_data)
2141 } *data = client_data;
2144 if (data->child == widget)
2145 data->index = data->i;
2149 gtk_container_child_default_composite_name (GtkContainer *container,
2159 /* fallback implementation */
2163 gtk_container_forall (container,
2164 gtk_container_child_position_callback,
2167 name = g_strdup_printf ("%s-%u",
2168 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2175 _gtk_container_child_composite_name (GtkContainer *container,
2178 gboolean composite_child;
2180 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2181 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2182 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2184 g_object_get (child, "composite-child", &composite_child, NULL);
2185 if (composite_child)
2187 static GQuark quark_composite_name = 0;
2190 if (!quark_composite_name)
2191 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2193 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2196 GtkContainerClass *class;
2198 class = GTK_CONTAINER_GET_CLASS (container);
2199 if (class->composite_name)
2200 name = class->composite_name (container, child);
2203 name = g_strdup (name);
2214 } ComputeExpandData;
2217 gtk_container_compute_expand_callback (GtkWidget *widget,
2218 gpointer client_data)
2220 ComputeExpandData *data = client_data;
2222 /* note that we don't get_expand on the child if we already know we
2223 * have to expand, so we only recurse into children until we find
2224 * one that expands and then we basically don't do any more
2225 * work. This means that we can leave some children in a
2226 * need_compute_expand state, which is fine, as long as GtkWidget
2227 * doesn't rely on an invariant that "if a child has
2228 * need_compute_expand, its parents also do"
2230 * gtk_widget_compute_expand() always returns FALSE if the
2231 * child is !visible so that's taken care of.
2233 data->hexpand = data->hexpand ||
2234 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2236 data->vexpand = data->vexpand ||
2237 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2241 gtk_container_compute_expand (GtkWidget *widget,
2242 gboolean *hexpand_p,
2243 gboolean *vexpand_p)
2245 ComputeExpandData data;
2247 data.hexpand = FALSE;
2248 data.vexpand = FALSE;
2250 gtk_container_forall (GTK_CONTAINER (widget),
2251 gtk_container_compute_expand_callback,
2254 *hexpand_p = data.hexpand;
2255 *vexpand_p = data.vexpand;
2259 gtk_container_real_set_focus_child (GtkContainer *container,
2262 GtkContainerPrivate *priv;
2264 g_return_if_fail (GTK_IS_CONTAINER (container));
2265 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2267 priv = container->priv;
2269 if (child != priv->focus_child)
2271 if (priv->focus_child)
2272 g_object_unref (priv->focus_child);
2273 priv->focus_child = child;
2274 if (priv->focus_child)
2275 g_object_ref (priv->focus_child);
2279 /* check for h/v adjustments
2281 if (priv->focus_child)
2283 GtkAdjustment *hadj;
2284 GtkAdjustment *vadj;
2285 GtkAllocation allocation;
2286 GtkWidget *focus_child;
2289 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2290 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2294 focus_child = priv->focus_child;
2295 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2297 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2300 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2303 gtk_widget_get_allocation (priv->focus_child, &allocation);
2307 gtk_widget_get_allocation (focus_child, &allocation);
2310 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2313 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2319 get_focus_chain (GtkContainer *container)
2321 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2324 /* same as gtk_container_get_children, except it includes internals
2327 _gtk_container_get_all_children (GtkContainer *container)
2329 GList *children = NULL;
2331 gtk_container_forall (container,
2332 gtk_container_children_callback,
2338 static GtkWidgetPath *
2339 gtk_container_real_get_path_for_child (GtkContainer *container,
2342 GtkStyleContext *context;
2343 GtkWidgetPath *path;
2346 context = gtk_widget_get_style_context (GTK_WIDGET (container));
2347 path = _gtk_widget_create_path (GTK_WIDGET (container));
2349 /* Copy any permanent classes to the path */
2350 classes = gtk_style_context_list_classes (context);
2357 classes = classes->next;
2359 gtk_widget_path_iter_add_class (path, -1, cur->data);
2360 g_list_free_1 (cur);
2363 gtk_widget_path_append_for_widget (path, child);
2369 gtk_container_focus (GtkWidget *widget,
2370 GtkDirectionType direction)
2373 GList *sorted_children;
2375 GtkContainer *container;
2376 GtkContainerPrivate *priv;
2378 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2380 container = GTK_CONTAINER (widget);
2381 priv = container->priv;
2385 if (gtk_widget_get_can_focus (widget))
2387 if (!gtk_widget_has_focus (widget))
2389 gtk_widget_grab_focus (widget);
2395 /* Get a list of the containers children, allowing focus
2396 * chain to override.
2398 if (priv->has_focus_chain)
2399 children = g_list_copy (get_focus_chain (container));
2401 children = _gtk_container_get_all_children (container);
2403 if (priv->has_focus_chain &&
2404 (direction == GTK_DIR_TAB_FORWARD ||
2405 direction == GTK_DIR_TAB_BACKWARD))
2407 sorted_children = g_list_copy (children);
2409 if (direction == GTK_DIR_TAB_BACKWARD)
2410 sorted_children = g_list_reverse (sorted_children);
2413 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2415 return_val = gtk_container_focus_move (container, sorted_children, direction);
2417 g_list_free (sorted_children);
2418 g_list_free (children);
2425 tab_compare (gconstpointer a,
2429 GtkAllocation child1_allocation, child2_allocation;
2430 const GtkWidget *child1 = a;
2431 const GtkWidget *child2 = b;
2432 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2435 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2436 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2438 y1 = child1_allocation.y + child1_allocation.height / 2;
2439 y2 = child2_allocation.y + child2_allocation.height / 2;
2443 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2444 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2446 if (text_direction == GTK_TEXT_DIR_RTL)
2447 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2449 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2452 return (y1 < y2) ? -1 : 1;
2456 gtk_container_focus_sort_tab (GtkContainer *container,
2458 GtkDirectionType direction,
2459 GtkWidget *old_focus)
2461 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2462 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2464 /* if we are going backwards then reverse the order
2467 if (direction == GTK_DIR_TAB_BACKWARD)
2468 children = g_list_reverse (children);
2473 /* Get coordinates of @widget's allocation with respect to
2474 * allocation of @container.
2477 get_allocation_coords (GtkContainer *container,
2479 GdkRectangle *allocation)
2481 gtk_widget_get_allocation (widget, allocation);
2483 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2484 0, 0, &allocation->x, &allocation->y);
2487 /* Look for a child in @children that is intermediate between
2488 * the focus widget and container. This widget, if it exists,
2489 * acts as the starting widget for focus navigation.
2492 find_old_focus (GtkContainer *container,
2495 GList *tmp_list = children;
2498 GtkWidget *child = tmp_list->data;
2499 GtkWidget *widget = child;
2501 while (widget && widget != (GtkWidget *)container)
2505 parent = gtk_widget_get_parent (widget);
2507 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2516 tmp_list = tmp_list->next;
2523 old_focus_coords (GtkContainer *container,
2524 GdkRectangle *old_focus_rect)
2526 GtkWidget *widget = GTK_WIDGET (container);
2527 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2528 GtkWidget *old_focus;
2530 if (GTK_IS_WINDOW (toplevel))
2532 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2534 return get_allocation_coords (container, old_focus, old_focus_rect);
2540 typedef struct _CompareInfo CompareInfo;
2544 GtkContainer *container;
2551 up_down_compare (gconstpointer a,
2555 GdkRectangle allocation1;
2556 GdkRectangle allocation2;
2557 CompareInfo *compare = data;
2560 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2561 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2563 y1 = allocation1.y + allocation1.height / 2;
2564 y2 = allocation2.y + allocation2.height / 2;
2568 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2569 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2571 if (compare->reverse)
2572 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2574 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2577 return (y1 < y2) ? -1 : 1;
2581 gtk_container_focus_sort_up_down (GtkContainer *container,
2583 GtkDirectionType direction,
2584 GtkWidget *old_focus)
2586 CompareInfo compare;
2588 GdkRectangle old_allocation;
2590 compare.container = container;
2591 compare.reverse = (direction == GTK_DIR_UP);
2594 old_focus = find_old_focus (container, children);
2596 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2602 /* Delete widgets from list that don't match minimum criteria */
2604 compare_x1 = old_allocation.x;
2605 compare_x2 = old_allocation.x + old_allocation.width;
2607 if (direction == GTK_DIR_UP)
2608 compare_y = old_allocation.y;
2610 compare_y = old_allocation.y + old_allocation.height;
2612 tmp_list = children;
2615 GtkWidget *child = tmp_list->data;
2616 GList *next = tmp_list->next;
2617 gint child_x1, child_x2;
2618 GdkRectangle child_allocation;
2620 if (child != old_focus)
2622 if (get_allocation_coords (container, child, &child_allocation))
2624 child_x1 = child_allocation.x;
2625 child_x2 = child_allocation.x + child_allocation.width;
2627 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2628 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2629 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2631 children = g_list_delete_link (children, tmp_list);
2635 children = g_list_delete_link (children, tmp_list);
2641 compare.x = (compare_x1 + compare_x2) / 2;
2642 compare.y = old_allocation.y + old_allocation.height / 2;
2646 /* No old focus widget, need to figure out starting x,y some other way
2648 GtkAllocation allocation;
2649 GtkWidget *widget = GTK_WIDGET (container);
2650 GdkRectangle old_focus_rect;
2652 gtk_widget_get_allocation (widget, &allocation);
2654 if (old_focus_coords (container, &old_focus_rect))
2656 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2660 if (!gtk_widget_get_has_window (widget))
2661 compare.x = allocation.x + allocation.width / 2;
2663 compare.x = allocation.width / 2;
2666 if (!gtk_widget_get_has_window (widget))
2667 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2669 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2672 children = g_list_sort_with_data (children, up_down_compare, &compare);
2674 if (compare.reverse)
2675 children = g_list_reverse (children);
2681 left_right_compare (gconstpointer a,
2685 GdkRectangle allocation1;
2686 GdkRectangle allocation2;
2687 CompareInfo *compare = data;
2690 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2691 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2693 x1 = allocation1.x + allocation1.width / 2;
2694 x2 = allocation2.x + allocation2.width / 2;
2698 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2699 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2701 if (compare->reverse)
2702 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2704 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2707 return (x1 < x2) ? -1 : 1;
2711 gtk_container_focus_sort_left_right (GtkContainer *container,
2713 GtkDirectionType direction,
2714 GtkWidget *old_focus)
2716 CompareInfo compare;
2718 GdkRectangle old_allocation;
2720 compare.container = container;
2721 compare.reverse = (direction == GTK_DIR_LEFT);
2724 old_focus = find_old_focus (container, children);
2726 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2732 /* Delete widgets from list that don't match minimum criteria */
2734 compare_y1 = old_allocation.y;
2735 compare_y2 = old_allocation.y + old_allocation.height;
2737 if (direction == GTK_DIR_LEFT)
2738 compare_x = old_allocation.x;
2740 compare_x = old_allocation.x + old_allocation.width;
2742 tmp_list = children;
2745 GtkWidget *child = tmp_list->data;
2746 GList *next = tmp_list->next;
2747 gint child_y1, child_y2;
2748 GdkRectangle child_allocation;
2750 if (child != old_focus)
2752 if (get_allocation_coords (container, child, &child_allocation))
2754 child_y1 = child_allocation.y;
2755 child_y2 = child_allocation.y + child_allocation.height;
2757 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2758 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2759 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2761 children = g_list_delete_link (children, tmp_list);
2765 children = g_list_delete_link (children, tmp_list);
2771 compare.y = (compare_y1 + compare_y2) / 2;
2772 compare.x = old_allocation.x + old_allocation.width / 2;
2776 /* No old focus widget, need to figure out starting x,y some other way
2778 GtkAllocation allocation;
2779 GtkWidget *widget = GTK_WIDGET (container);
2780 GdkRectangle old_focus_rect;
2782 gtk_widget_get_allocation (widget, &allocation);
2784 if (old_focus_coords (container, &old_focus_rect))
2786 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2790 if (!gtk_widget_get_has_window (widget))
2791 compare.y = allocation.y + allocation.height / 2;
2793 compare.y = allocation.height / 2;
2796 if (!gtk_widget_get_has_window (widget))
2797 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2799 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2802 children = g_list_sort_with_data (children, left_right_compare, &compare);
2804 if (compare.reverse)
2805 children = g_list_reverse (children);
2811 * gtk_container_focus_sort:
2812 * @container: a #GtkContainer
2813 * @children: a list of descendents of @container (they don't
2814 * have to be direct children)
2815 * @direction: focus direction
2816 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2817 * to determine this automatically.
2818 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2819 * which is the only @direction we use currently,
2820 * so perhaps this argument should be removed)
2822 * Sorts @children in the correct order for focusing with
2823 * direction type @direction.
2825 * Return value: a copy of @children, sorted in correct focusing order,
2826 * with children that aren't suitable for focusing in this direction
2830 _gtk_container_focus_sort (GtkContainer *container,
2832 GtkDirectionType direction,
2833 GtkWidget *old_focus)
2835 GList *visible_children = NULL;
2839 if (gtk_widget_get_realized (children->data))
2840 visible_children = g_list_prepend (visible_children, children->data);
2841 children = children->next;
2846 case GTK_DIR_TAB_FORWARD:
2847 case GTK_DIR_TAB_BACKWARD:
2848 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2851 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2854 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2857 g_assert_not_reached ();
2863 gtk_container_focus_move (GtkContainer *container,
2865 GtkDirectionType direction)
2867 GtkContainerPrivate *priv = container->priv;
2868 GtkWidget *focus_child;
2871 focus_child = priv->focus_child;
2875 child = children->data;
2876 children = children->next;
2883 if (focus_child == child)
2887 if (gtk_widget_child_focus (child, direction))
2891 else if (gtk_widget_is_drawable (child) &&
2892 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2894 if (gtk_widget_child_focus (child, direction))
2904 gtk_container_children_callback (GtkWidget *widget,
2905 gpointer client_data)
2909 children = (GList**) client_data;
2910 *children = g_list_prepend (*children, widget);
2914 chain_widget_destroyed (GtkWidget *widget,
2917 GtkContainer *container;
2920 container = GTK_CONTAINER (user_data);
2922 chain = g_object_get_data (G_OBJECT (container),
2923 "gtk-container-focus-chain");
2925 chain = g_list_remove (chain, widget);
2927 g_signal_handlers_disconnect_by_func (widget,
2928 chain_widget_destroyed,
2931 g_object_set_data (G_OBJECT (container),
2932 I_("gtk-container-focus-chain"),
2937 * gtk_container_set_focus_chain:
2938 * @container: a #GtkContainer
2939 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2940 * the new focus chain
2942 * Sets a focus chain, overriding the one computed automatically by GTK+.
2944 * In principle each widget in the chain should be a descendant of the
2945 * container, but this is not enforced by this method, since it's allowed
2946 * to set the focus chain before you pack the widgets, or have a widget
2947 * in the chain that isn't always packed. The necessary checks are done
2948 * when the focus chain is actually traversed.
2951 gtk_container_set_focus_chain (GtkContainer *container,
2952 GList *focusable_widgets)
2956 GtkContainerPrivate *priv;
2958 g_return_if_fail (GTK_IS_CONTAINER (container));
2960 priv = container->priv;
2962 if (priv->has_focus_chain)
2963 gtk_container_unset_focus_chain (container);
2965 priv->has_focus_chain = TRUE;
2968 tmp_list = focusable_widgets;
2969 while (tmp_list != NULL)
2971 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2973 /* In principle each widget in the chain should be a descendant
2974 * of the container, but we don't want to check that here. It's
2975 * expensive and also it's allowed to set the focus chain before
2976 * you pack the widgets, or have a widget in the chain that isn't
2977 * always packed. So we check for ancestor during actual traversal.
2980 chain = g_list_prepend (chain, tmp_list->data);
2982 g_signal_connect (tmp_list->data,
2984 G_CALLBACK (chain_widget_destroyed),
2987 tmp_list = g_list_next (tmp_list);
2990 chain = g_list_reverse (chain);
2992 g_object_set_data (G_OBJECT (container),
2993 I_("gtk-container-focus-chain"),
2998 * gtk_container_get_focus_chain:
2999 * @container: a #GtkContainer
3000 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
3001 * to store the focus chain of the
3002 * container, or %NULL. You should free this list
3003 * using g_list_free() when you are done with it, however
3004 * no additional reference count is added to the
3005 * individual widgets in the focus chain.
3007 * Retrieves the focus chain of the container, if one has been
3008 * set explicitly. If no focus chain has been explicitly
3009 * set, GTK+ computes the focus chain based on the positions
3010 * of the children. In that case, GTK+ stores %NULL in
3011 * @focusable_widgets and returns %FALSE.
3013 * Return value: %TRUE if the focus chain of the container
3014 * has been set explicitly.
3017 gtk_container_get_focus_chain (GtkContainer *container,
3018 GList **focus_chain)
3020 GtkContainerPrivate *priv;
3022 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
3024 priv = container->priv;
3028 if (priv->has_focus_chain)
3029 *focus_chain = g_list_copy (get_focus_chain (container));
3031 *focus_chain = NULL;
3034 return priv->has_focus_chain;
3038 * gtk_container_unset_focus_chain:
3039 * @container: a #GtkContainer
3041 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
3044 gtk_container_unset_focus_chain (GtkContainer *container)
3046 GtkContainerPrivate *priv;
3048 g_return_if_fail (GTK_IS_CONTAINER (container));
3050 priv = container->priv;
3052 if (priv->has_focus_chain)
3057 chain = get_focus_chain (container);
3059 priv->has_focus_chain = FALSE;
3061 g_object_set_data (G_OBJECT (container),
3062 I_("gtk-container-focus-chain"),
3066 while (tmp_list != NULL)
3068 g_signal_handlers_disconnect_by_func (tmp_list->data,
3069 chain_widget_destroyed,
3072 tmp_list = g_list_next (tmp_list);
3075 g_list_free (chain);
3080 * gtk_container_set_focus_vadjustment:
3081 * @container: a #GtkContainer
3082 * @adjustment: an adjustment which should be adjusted when the focus
3083 * is moved among the descendents of @container
3085 * Hooks up an adjustment to focus handling in a container, so when a
3086 * child of the container is focused, the adjustment is scrolled to
3087 * show that widget. This function sets the vertical alignment. See
3088 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
3089 * the adjustment and gtk_container_set_focus_hadjustment() for setting
3090 * the horizontal adjustment.
3092 * The adjustments have to be in pixel units and in the same coordinate
3093 * system as the allocation for immediate children of the container.
3096 gtk_container_set_focus_vadjustment (GtkContainer *container,
3097 GtkAdjustment *adjustment)
3099 g_return_if_fail (GTK_IS_CONTAINER (container));
3101 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3104 g_object_ref (adjustment);
3106 g_object_set_qdata_full (G_OBJECT (container),
3113 * gtk_container_get_focus_vadjustment:
3114 * @container: a #GtkContainer
3116 * Retrieves the vertical focus adjustment for the container. See
3117 * gtk_container_set_focus_vadjustment().
3119 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
3120 * none has been set.
3123 gtk_container_get_focus_vadjustment (GtkContainer *container)
3125 GtkAdjustment *vadjustment;
3127 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3129 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
3135 * gtk_container_set_focus_hadjustment:
3136 * @container: a #GtkContainer
3137 * @adjustment: an adjustment which should be adjusted when the focus is
3138 * moved among the descendents of @container
3140 * Hooks up an adjustment to focus handling in a container, so when a child
3141 * of the container is focused, the adjustment is scrolled to show that
3142 * widget. This function sets the horizontal alignment.
3143 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
3144 * the adjustment and gtk_container_set_focus_vadjustment() for setting
3145 * the vertical adjustment.
3147 * The adjustments have to be in pixel units and in the same coordinate
3148 * system as the allocation for immediate children of the container.
3151 gtk_container_set_focus_hadjustment (GtkContainer *container,
3152 GtkAdjustment *adjustment)
3154 g_return_if_fail (GTK_IS_CONTAINER (container));
3156 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3159 g_object_ref (adjustment);
3161 g_object_set_qdata_full (G_OBJECT (container),
3168 * gtk_container_get_focus_hadjustment:
3169 * @container: a #GtkContainer
3171 * Retrieves the horizontal focus adjustment for the container. See
3172 * gtk_container_set_focus_hadjustment ().
3174 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3175 * none has been set.
3178 gtk_container_get_focus_hadjustment (GtkContainer *container)
3180 GtkAdjustment *hadjustment;
3182 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3184 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3191 gtk_container_show_all (GtkWidget *widget)
3193 g_return_if_fail (GTK_IS_CONTAINER (widget));
3195 gtk_container_foreach (GTK_CONTAINER (widget),
3196 (GtkCallback) gtk_widget_show_all,
3198 gtk_widget_show (widget);
3202 gtk_container_draw_child (GtkWidget *child,
3203 gpointer client_data)
3206 GtkWidget *container;
3208 } *data = client_data;
3210 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3216 gtk_container_draw (GtkWidget *widget,
3220 GtkWidget *container;
3224 data.container = widget;
3227 gtk_container_forall (GTK_CONTAINER (widget),
3228 gtk_container_draw_child,
3235 gtk_container_map_child (GtkWidget *child,
3236 gpointer client_data)
3238 if (gtk_widget_get_visible (child) &&
3239 gtk_widget_get_child_visible (child) &&
3240 !gtk_widget_get_mapped (child))
3241 gtk_widget_map (child);
3245 gtk_container_map (GtkWidget *widget)
3247 gtk_widget_set_mapped (widget, TRUE);
3249 gtk_container_forall (GTK_CONTAINER (widget),
3250 gtk_container_map_child,
3253 if (gtk_widget_get_has_window (widget))
3254 gdk_window_show (gtk_widget_get_window (widget));
3258 gtk_container_unmap (GtkWidget *widget)
3260 gtk_widget_set_mapped (widget, FALSE);
3262 /* hide our window first so user doesn't see all the child windows
3263 * vanishing one by one. (only matters these days if one of the
3264 * children has an actual native window instead of client-side
3265 * window, e.g. a GtkSocket would)
3267 if (gtk_widget_get_has_window (widget))
3268 gdk_window_hide (gtk_widget_get_window (widget));
3270 gtk_container_forall (GTK_CONTAINER (widget),
3271 (GtkCallback)gtk_widget_unmap,
3276 * gtk_container_propagate_draw:
3277 * @container: a #GtkContainer
3278 * @child: a child of @container
3279 * @cr: Cairo context as passed to the container. If you want to use @cr
3280 * in container's draw function, consider using cairo_save() and
3281 * cairo_restore() before calling this function.
3283 * When a container receives a call to the draw function, it must send
3284 * synthetic #GtkWidget::draw calls to all children that don't have their
3285 * own #GdkWindows. This function provides a convenient way of doing this.
3286 * A container, when it receives a call to its #GtkWidget::draw function,
3287 * calls gtk_container_propagate_draw() once for each child, passing in
3288 * the @cr the container received.
3290 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3291 * and deciding whether the draw needs to be sent to the child. It is a
3292 * convenient and optimized way of getting the same effect as calling
3293 * gtk_widget_draw() on the child directly.
3295 * In most cases, a container can simply either inherit the
3296 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3297 * and then chain to the ::draw implementation from #GtkContainer.
3300 gtk_container_propagate_draw (GtkContainer *container,
3304 GdkEventExpose *event;
3305 GtkAllocation allocation;
3306 GdkWindow *window, *w;
3309 g_return_if_fail (GTK_IS_CONTAINER (container));
3310 g_return_if_fail (GTK_IS_WIDGET (child));
3311 g_return_if_fail (cr != NULL);
3313 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3315 event = _gtk_cairo_get_event (cr);
3318 if (gtk_widget_get_has_window (child) ||
3319 gtk_widget_get_window (child) != event->window)
3325 /* translate coordinates. Ugly business, that. */
3326 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3328 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3338 window = gtk_widget_get_window (GTK_WIDGET (container));
3340 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3343 gdk_window_get_position (w, &wx, &wy);
3354 if (!gtk_widget_get_has_window (child))
3356 gtk_widget_get_allocation (child, &allocation);
3361 cairo_translate (cr, x, y);
3363 _gtk_widget_draw_internal (child, cr, TRUE);
3369 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3371 return container->priv->reallocate_redraws;
3375 * gtk_container_get_path_for_child:
3376 * @container: a #GtkContainer
3377 * @child: a child of @container
3379 * Returns a newly created widget path representing all the widget hierarchy
3380 * from the toplevel down to and including @child.
3382 * Returns: A newly created #GtkWidgetPath
3385 gtk_container_get_path_for_child (GtkContainer *container,
3388 GtkWidgetPath *path;
3390 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3391 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
3392 g_return_val_if_fail (container == (GtkContainer *) gtk_widget_get_parent (child), NULL);
3394 path = GTK_CONTAINER_GET_CLASS (container)->get_path_for_child (container, child);
3395 if (gtk_widget_path_get_object_type (path) != G_OBJECT_TYPE (child))
3397 g_critical ("%s %p returned a widget path for type %s, but child is %s",
3398 G_OBJECT_TYPE_NAME (container),
3400 g_type_name (gtk_widget_path_get_object_type (path)),
3401 G_OBJECT_TYPE_NAME (child));