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 "gtkwidgetprivate.h"
46 #include "gtkwindow.h"
47 #include "gtkassistant.h"
49 #include "gtkstylecontextprivate.h"
50 #include "gtkwidgetpath.h"
51 #include "a11y/gtkcontaineraccessible.h"
54 * SECTION:gtkcontainer
55 * @Short_description: Base class for widgets which contain other widgets
56 * @Title: GtkContainer
58 * A GTK+ user interface is constructed by nesting widgets inside widgets.
59 * Container widgets are the inner nodes in the resulting tree of widgets:
60 * they contain other widgets. So, for example, you might have a #GtkWindow
61 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
62 * of a textual label inside the frame, you might replace the #GtkLabel widget
63 * with a #GtkImage widget.
65 * There are two major kinds of container widgets in GTK+. Both are subclasses
66 * of the abstract GtkContainer base class.
68 * The first type of container widget has a single child widget and derives
69 * from #GtkBin. These containers are <emphasis>decorators</emphasis>, which
70 * add some kind of functionality to the child. For example, a #GtkButton makes
71 * its child into a clickable button; a #GtkFrame draws a frame around its child
72 * and a #GtkWindow places its child widget inside a top-level window.
74 * The second type of container can have more than one child; its purpose is to
75 * manage <emphasis>layout</emphasis>. This means that these containers assign
76 * sizes and positions to their children. For example, a #GtkHBox arranges its
77 * children in a horizontal row, and a #GtkGrid arranges the widgets it contains
78 * in a two-dimensional grid.
80 * <refsect2 id="container-geometry-management">
81 * <title>Height for width geometry management</title>
83 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
84 * Height-for-width means that a widget can change how much vertical space it needs,
85 * depending on the amount of horizontal space that it is given (and similar for
88 * There are some things to keep in mind when implementing container widgets
89 * that make use of GTK+'s height for width geometry management system. First,
90 * it's important to note that a container must prioritize one of its
91 * dimensions, that is to say that a widget or container can only have a
92 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
93 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
94 * must be able to respond to the APIs for both dimensions, i.e. even if a
95 * widget has a request mode that is height-for-width, it is possible that
96 * its parent will request its sizes using the width-for-height APIs.
98 * To ensure that everything works properly, here are some guidelines to follow
99 * when implementing height-for-width (or width-for-height) containers.
101 * Each request mode involves 2 virtual methods. Height-for-width apis run
102 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
103 * When handling requests in the opposite #GtkSizeRequestMode it is important that
104 * every widget request at least enough space to display all of its content at all times.
106 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
107 * the container must return the height for its minimum width. This is easily achieved by
108 * simply calling the reverse apis implemented for itself as follows:
110 * <programlisting><![CDATA[
112 * foo_container_get_preferred_height (GtkWidget *widget, gint *min_height, gint *nat_height)
114 * if (i_am_in_height_for_width_mode)
118 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
119 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width,
120 * min_height, nat_height);
124 * ... many containers support both request modes, execute the real width-for-height
125 * request here by returning the collective heights of all widgets that are
126 * stacked vertically (or whatever is appropriate for this container) ...
129 * ]]></programlisting>
131 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
132 * that is height-for-width, it then only needs to return the base minimum width like so:
134 * <programlisting><![CDATA[
136 * foo_container_get_preferred_width_for_height (GtkWidget *widget, gint for_height,
137 * gint *min_width, gint *nat_width)
139 * if (i_am_in_height_for_width_mode)
141 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, min_width, nat_width);
145 * ... execute the real width-for-height request here based on the required width
146 * of the children collectively if the container were to be allocated the said height ...
149 * ]]></programlisting>
151 * Height for width requests are generally implemented in terms of a virtual allocation
152 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
153 * would implement the <function>get_preferred_height_for_width()</function> virtual function by first calling
154 * gtk_widget_get_preferred_width() for each of its children.
156 * For each potential group of children that are lined up horizontally, the values returned by
157 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures.
158 * Any child spacing should be removed from the input @for_width and then the collective size should be
159 * allocated using the gtk_distribute_natural_allocation() convenience function.
161 * The container will then move on to request the preferred height for each child by using
162 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
164 * To allocate a height-for-width container, it's again important
165 * to consider that a container must prioritize one dimension over the other. So if
166 * a container is a height-for-width container it must first allocate all widgets horizontally
167 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
168 * extra space (if and where appropriate) for the widget to expand.
170 * After adding all the expand space, the container assumes it was allocated sufficient
171 * height to fit all of its content. At this time, the container must use the total horizontal sizes
172 * of each widget to request the height-for-width of each of its children and store the requests in a
173 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
174 * be generalized into the heights and widths of rows and columns).
175 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
176 * while this time considering the allocated height of the widget minus any vertical spacing
177 * that the container adds. Then vertical expand space should be added where appropriate and available
178 * and the container should go on to actually allocating the child widgets.
180 * See <link linkend="geometry-management">GtkWidget's geometry management section</link>
181 * to learn more about implementing height-for-width geometry management for widgets.
184 * <refsect2 id="child-properties">
185 * <title>Child properties</title>
187 * GtkContainer introduces <emphasis>child properties</emphasis>.
188 * These are object properties that are not specific
189 * to either the container or the contained widget, but rather to their relation.
190 * Typical examples of child properties are the position or pack-type of a widget
191 * which is contained in a #GtkBox.
193 * Use gtk_container_class_install_child_property() to install child properties
194 * for a container class and gtk_container_class_find_child_property() or
195 * gtk_container_class_list_child_properties() to get information about existing
198 * To set the value of a child property, use gtk_container_child_set_property(),
199 * gtk_container_child_set() or gtk_container_child_set_valist().
200 * To obtain the value of a child property, use
201 * gtk_container_child_get_property(), gtk_container_child_get() or
202 * gtk_container_child_get_valist(). To emit notification about child property
203 * changes, use gtk_widget_child_notify().
206 * <refsect2 id="GtkContainer-BUILDER-UI">
207 * <title>GtkContainer as GtkBuildable</title>
209 * The GtkContainer implementation of the GtkBuildable interface
210 * supports a <packing> element for children, which can
211 * contain multiple <property> elements that specify
212 * child properties for the child.
214 * <title>Child properties in UI definitions</title>
215 * <programlisting><![CDATA[
216 * <object class="GtkVBox">
218 * <object class="GtkLabel"/>
220 * <property name="pack-type">start</property>
224 * ]]></programlisting>
226 * Since 2.16, child properties can also be marked as translatable using
227 * the same "translatable", "comments" and "context" attributes that are used
228 * for regular properties.
234 struct _GtkContainerPrivate
236 GtkWidget *focus_child;
238 guint border_width : 16;
240 guint has_focus_chain : 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));
516 gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_CONTAINER_ACCESSIBLE);
520 gtk_container_buildable_init (GtkBuildableIface *iface)
522 parent_buildable_iface = g_type_interface_peek_parent (iface);
523 iface->add_child = gtk_container_buildable_add_child;
524 iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
525 iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
529 gtk_container_buildable_add_child (GtkBuildable *buildable,
536 GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
538 else if (GTK_IS_WIDGET (child) &&
539 gtk_widget_get_parent (GTK_WIDGET (child)) == NULL)
541 gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
544 g_warning ("Cannot add an object of type %s to a container of type %s",
545 g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
549 gtk_container_buildable_set_child_property (GtkContainer *container,
556 GValue gvalue = G_VALUE_INIT;
557 GError *error = NULL;
559 pspec = gtk_container_class_find_child_property
560 (G_OBJECT_GET_CLASS (container), name);
563 g_warning ("%s does not have a property called %s",
564 g_type_name (G_OBJECT_TYPE (container)), name);
568 if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
570 g_warning ("Could not read property %s:%s with value %s of type %s: %s",
571 g_type_name (G_OBJECT_TYPE (container)),
574 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
576 g_error_free (error);
580 gtk_container_child_set_property (container, child, name, &gvalue);
581 g_value_unset (&gvalue);
586 GtkContainer *container;
589 gchar *child_prop_name;
591 gboolean translatable;
592 } PackingPropertiesData;
595 attributes_start_element (GMarkupParseContext *context,
596 const gchar *element_name,
598 const gchar **values,
602 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
605 if (strcmp (element_name, "property") == 0)
607 for (i = 0; names[i]; i++)
608 if (strcmp (names[i], "name") == 0)
609 parser_data->child_prop_name = g_strdup (values[i]);
610 else if (strcmp (names[i], "translatable") == 0)
612 if (!_gtk_builder_boolean_from_string (values[1],
613 &parser_data->translatable,
617 else if (strcmp (names[i], "comments") == 0)
618 ; /* for translators */
619 else if (strcmp (names[i], "context") == 0)
620 parser_data->context = g_strdup (values[1]);
622 g_warning ("Unsupported attribute for GtkContainer Child "
623 "property: %s\n", names[i]);
625 else if (strcmp (element_name, "packing") == 0)
628 g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
632 attributes_text_element (GMarkupParseContext *context,
638 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
640 if (parser_data->child_prop_name)
641 g_string_append_len (parser_data->string, text, text_len);
645 attributes_end_element (GMarkupParseContext *context,
646 const gchar *element_name,
650 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
652 /* translate the string */
653 if (parser_data->string->len && parser_data->translatable)
658 domain = gtk_builder_get_translation_domain (parser_data->builder);
660 translated = _gtk_builder_parser_translate (domain,
661 parser_data->context,
662 parser_data->string->str);
663 g_string_set_size (parser_data->string, 0);
664 g_string_append (parser_data->string, translated);
667 if (parser_data->child_prop_name)
668 gtk_container_buildable_set_child_property (parser_data->container,
669 parser_data->builder,
671 parser_data->child_prop_name,
672 parser_data->string->str);
674 g_string_set_size (parser_data->string, 0);
675 g_free (parser_data->child_prop_name);
676 g_free (parser_data->context);
677 parser_data->child_prop_name = NULL;
678 parser_data->context = NULL;
679 parser_data->translatable = FALSE;
682 static const GMarkupParser attributes_parser =
684 attributes_start_element,
685 attributes_end_element,
686 attributes_text_element,
690 gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
693 const gchar *tagname,
694 GMarkupParser *parser,
697 PackingPropertiesData *parser_data;
699 if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
700 tagname, parser, data))
703 if (child && strcmp (tagname, "packing") == 0)
705 parser_data = g_slice_new0 (PackingPropertiesData);
706 parser_data->string = g_string_new ("");
707 parser_data->builder = builder;
708 parser_data->container = GTK_CONTAINER (buildable);
709 parser_data->child = GTK_WIDGET (child);
710 parser_data->child_prop_name = NULL;
712 *parser = attributes_parser;
721 gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
724 const gchar *tagname,
727 if (strcmp (tagname, "packing") == 0)
729 PackingPropertiesData *parser_data = (PackingPropertiesData*)data;
730 g_string_free (parser_data->string, TRUE);
731 g_slice_free (PackingPropertiesData, parser_data);
735 if (parent_buildable_iface->custom_tag_end)
736 parent_buildable_iface->custom_tag_end (buildable, builder,
737 child, tagname, data);
741 * gtk_container_child_type:
742 * @container: a #GtkContainer
744 * Returns the type of the children supported by the container.
746 * Note that this may return %G_TYPE_NONE to indicate that no more
747 * children can be added, e.g. for a #GtkPaned which already has two
750 * Return value: a #GType.
753 gtk_container_child_type (GtkContainer *container)
756 GtkContainerClass *class;
758 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
760 class = GTK_CONTAINER_GET_CLASS (container);
761 if (class->child_type)
762 slot = class->child_type (container);
769 /* --- GtkContainer child property mechanism --- */
772 * gtk_container_child_notify:
773 * @container: the #GtkContainer
774 * @child: the child widget
775 * @child_property: the name of a child property installed on
776 * the class of @container
778 * Emits a #GtkWidget::child-notify signal for the
779 * <link linkend="child-properties">child property</link>
780 * @child_property on widget.
782 * This is an analogue of g_object_notify() for child properties.
784 * Also see gtk_widget_child_notify().
789 gtk_container_child_notify (GtkContainer *container,
791 const gchar *child_property)
796 g_return_if_fail (GTK_IS_CONTAINER (container));
797 g_return_if_fail (GTK_IS_WIDGET (child));
798 g_return_if_fail (child_property != NULL);
800 obj = G_OBJECT (child);
802 if (obj->ref_count == 0)
807 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
809 G_OBJECT_TYPE (container),
814 g_warning ("%s: container class `%s' has no child property named `%s'",
816 G_OBJECT_TYPE_NAME (container),
821 GObjectNotifyQueue *nqueue;
823 nqueue = g_object_notify_queue_freeze (obj, _gtk_widget_child_property_notify_context);
825 g_object_notify_queue_add (obj, nqueue, pspec);
826 g_object_notify_queue_thaw (obj, nqueue);
829 g_object_unref (obj);
833 container_get_child_property (GtkContainer *container,
838 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
840 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
844 container_set_child_property (GtkContainer *container,
848 GObjectNotifyQueue *nqueue)
850 GValue tmp_value = G_VALUE_INIT;
851 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
853 /* provide a copy to work from, convert (if necessary) and validate */
854 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
855 if (!g_value_transform (value, &tmp_value))
856 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
858 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
859 G_VALUE_TYPE_NAME (value));
860 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
862 gchar *contents = g_strdup_value_contents (value);
864 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
866 G_VALUE_TYPE_NAME (value),
868 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
873 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
874 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
876 g_value_unset (&tmp_value);
880 * gtk_container_child_get_valist:
881 * @container: a #GtkContainer
882 * @child: a widget which is a child of @container
883 * @first_property_name: the name of the first property to get
884 * @var_args: return location for the first property, followed
885 * optionally by more name/return location pairs, followed by %NULL
887 * Gets the values of one or more child properties for @child and @container.
890 gtk_container_child_get_valist (GtkContainer *container,
892 const gchar *first_property_name,
897 g_return_if_fail (GTK_IS_CONTAINER (container));
898 g_return_if_fail (GTK_IS_WIDGET (child));
900 g_object_ref (container);
901 g_object_ref (child);
903 name = first_property_name;
906 GValue value = G_VALUE_INIT;
910 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
912 G_OBJECT_TYPE (container),
916 g_warning ("%s: container class `%s' has no child property named `%s'",
918 G_OBJECT_TYPE_NAME (container),
922 if (!(pspec->flags & G_PARAM_READABLE))
924 g_warning ("%s: child property `%s' of container class `%s' is not readable",
927 G_OBJECT_TYPE_NAME (container));
930 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
931 container_get_child_property (container, child, pspec, &value);
932 G_VALUE_LCOPY (&value, var_args, 0, &error);
935 g_warning ("%s: %s", G_STRLOC, error);
937 g_value_unset (&value);
940 g_value_unset (&value);
941 name = va_arg (var_args, gchar*);
944 g_object_unref (child);
945 g_object_unref (container);
949 * gtk_container_child_get_property:
950 * @container: a #GtkContainer
951 * @child: a widget which is a child of @container
952 * @property_name: the name of the property to get
953 * @value: a location to return the value
955 * Gets the value of a child property for @child and @container.
958 gtk_container_child_get_property (GtkContainer *container,
960 const gchar *property_name,
965 g_return_if_fail (GTK_IS_CONTAINER (container));
966 g_return_if_fail (GTK_IS_WIDGET (child));
967 g_return_if_fail (property_name != NULL);
968 g_return_if_fail (G_IS_VALUE (value));
970 g_object_ref (container);
971 g_object_ref (child);
972 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
973 G_OBJECT_TYPE (container), TRUE);
975 g_warning ("%s: container class `%s' has no child property named `%s'",
977 G_OBJECT_TYPE_NAME (container),
979 else if (!(pspec->flags & G_PARAM_READABLE))
980 g_warning ("%s: child property `%s' of container class `%s' is not readable",
983 G_OBJECT_TYPE_NAME (container));
986 GValue *prop_value, tmp_value = G_VALUE_INIT;
988 /* auto-conversion of the callers value type
990 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
992 g_value_reset (value);
995 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
997 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
999 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
1000 G_VALUE_TYPE_NAME (value));
1001 g_object_unref (child);
1002 g_object_unref (container);
1007 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
1008 prop_value = &tmp_value;
1010 container_get_child_property (container, child, pspec, prop_value);
1011 if (prop_value != value)
1013 g_value_transform (prop_value, value);
1014 g_value_unset (&tmp_value);
1017 g_object_unref (child);
1018 g_object_unref (container);
1022 * gtk_container_child_set_valist:
1023 * @container: a #GtkContainer
1024 * @child: a widget which is a child of @container
1025 * @first_property_name: the name of the first property to set
1026 * @var_args: a %NULL-terminated list of property names and values, starting
1027 * with @first_prop_name
1029 * Sets one or more child properties for @child and @container.
1032 gtk_container_child_set_valist (GtkContainer *container,
1034 const gchar *first_property_name,
1037 GObjectNotifyQueue *nqueue;
1040 g_return_if_fail (GTK_IS_CONTAINER (container));
1041 g_return_if_fail (GTK_IS_WIDGET (child));
1043 g_object_ref (container);
1044 g_object_ref (child);
1046 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1047 name = first_property_name;
1050 GValue value = G_VALUE_INIT;
1051 gchar *error = NULL;
1052 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1054 G_OBJECT_TYPE (container),
1058 g_warning ("%s: container class `%s' has no child property named `%s'",
1060 G_OBJECT_TYPE_NAME (container),
1064 if (!(pspec->flags & G_PARAM_WRITABLE))
1066 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1069 G_OBJECT_TYPE_NAME (container));
1073 G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
1074 var_args, 0, &error);
1077 g_warning ("%s: %s", G_STRLOC, error);
1080 /* we purposely leak the value here, it might not be
1081 * in a sane state if an error condition occoured
1085 container_set_child_property (container, child, pspec, &value, nqueue);
1086 g_value_unset (&value);
1087 name = va_arg (var_args, gchar*);
1089 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1091 g_object_unref (container);
1092 g_object_unref (child);
1096 * gtk_container_child_set_property:
1097 * @container: a #GtkContainer
1098 * @child: a widget which is a child of @container
1099 * @property_name: the name of the property to set
1100 * @value: the value to set the property to
1102 * Sets a child property for @child and @container.
1105 gtk_container_child_set_property (GtkContainer *container,
1107 const gchar *property_name,
1108 const GValue *value)
1110 GObjectNotifyQueue *nqueue;
1113 g_return_if_fail (GTK_IS_CONTAINER (container));
1114 g_return_if_fail (GTK_IS_WIDGET (child));
1115 g_return_if_fail (property_name != NULL);
1116 g_return_if_fail (G_IS_VALUE (value));
1118 g_object_ref (container);
1119 g_object_ref (child);
1121 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1122 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1123 G_OBJECT_TYPE (container), TRUE);
1125 g_warning ("%s: container class `%s' has no child property named `%s'",
1127 G_OBJECT_TYPE_NAME (container),
1129 else if (!(pspec->flags & G_PARAM_WRITABLE))
1130 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1133 G_OBJECT_TYPE_NAME (container));
1136 container_set_child_property (container, child, pspec, value, nqueue);
1138 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1139 g_object_unref (container);
1140 g_object_unref (child);
1144 * gtk_container_add_with_properties:
1145 * @container: a #GtkContainer
1146 * @widget: a widget to be placed inside @container
1147 * @first_prop_name: the name of the first child property to set
1148 * @...: a %NULL-terminated list of property names and values, starting
1149 * with @first_prop_name
1151 * Adds @widget to @container, setting child properties at the same time.
1152 * See gtk_container_add() and gtk_container_child_set() for more details.
1155 gtk_container_add_with_properties (GtkContainer *container,
1157 const gchar *first_prop_name,
1160 g_return_if_fail (GTK_IS_CONTAINER (container));
1161 g_return_if_fail (GTK_IS_WIDGET (widget));
1162 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1164 g_object_ref (container);
1165 g_object_ref (widget);
1166 gtk_widget_freeze_child_notify (widget);
1168 g_signal_emit (container, container_signals[ADD], 0, widget);
1169 if (gtk_widget_get_parent (widget))
1173 va_start (var_args, first_prop_name);
1174 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1178 gtk_widget_thaw_child_notify (widget);
1179 g_object_unref (widget);
1180 g_object_unref (container);
1184 * gtk_container_child_set:
1185 * @container: a #GtkContainer
1186 * @child: a widget which is a child of @container
1187 * @first_prop_name: the name of the first property to set
1188 * @...: a %NULL-terminated list of property names and values, starting
1189 * with @first_prop_name
1191 * Sets one or more child properties for @child and @container.
1194 gtk_container_child_set (GtkContainer *container,
1196 const gchar *first_prop_name,
1201 va_start (var_args, first_prop_name);
1202 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1207 * gtk_container_child_get:
1208 * @container: a #GtkContainer
1209 * @child: a widget which is a child of @container
1210 * @first_prop_name: the name of the first property to get
1211 * @...: return location for the first property, followed
1212 * optionally by more name/return location pairs, followed by %NULL
1214 * Gets the values of one or more child properties for @child and @container.
1217 gtk_container_child_get (GtkContainer *container,
1219 const gchar *first_prop_name,
1224 va_start (var_args, first_prop_name);
1225 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1230 * gtk_container_class_install_child_property:
1231 * @cclass: a #GtkContainerClass
1232 * @property_id: the id for the property
1233 * @pspec: the #GParamSpec for the property
1235 * Installs a child property on a container class.
1238 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1242 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1243 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1244 if (pspec->flags & G_PARAM_WRITABLE)
1245 g_return_if_fail (cclass->set_child_property != NULL);
1246 if (pspec->flags & G_PARAM_READABLE)
1247 g_return_if_fail (cclass->get_child_property != NULL);
1248 g_return_if_fail (property_id > 0);
1249 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1250 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1251 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1253 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1255 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1256 G_OBJECT_CLASS_NAME (cclass),
1260 g_param_spec_ref (pspec);
1261 g_param_spec_sink (pspec);
1262 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1263 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1267 * gtk_container_class_find_child_property:
1268 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1269 * @property_name: the name of the child property to find
1271 * Finds a child property of a container class by name.
1273 * Returns: (transfer none): the #GParamSpec of the child property
1274 * or %NULL if @class has no child property with that name.
1277 gtk_container_class_find_child_property (GObjectClass *cclass,
1278 const gchar *property_name)
1280 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1281 g_return_val_if_fail (property_name != NULL, NULL);
1283 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1285 G_OBJECT_CLASS_TYPE (cclass),
1290 * gtk_container_class_list_child_properties:
1291 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1292 * @n_properties: location to return the number of child properties found
1294 * Returns all child properties of a container class.
1296 * Returns: (array length=n_properties) (transfer container):
1297 * a newly allocated %NULL-terminated array of #GParamSpec*.
1298 * The array must be freed with g_free().
1301 gtk_container_class_list_child_properties (GObjectClass *cclass,
1302 guint *n_properties)
1304 GParamSpec **pspecs;
1307 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1309 pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
1310 G_OBJECT_CLASS_TYPE (cclass),
1319 gtk_container_add_unimplemented (GtkContainer *container,
1322 g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1326 gtk_container_remove_unimplemented (GtkContainer *container,
1329 g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1333 gtk_container_init (GtkContainer *container)
1335 GtkContainerPrivate *priv;
1337 container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
1339 GtkContainerPrivate);
1340 priv = container->priv;
1342 priv->focus_child = NULL;
1343 priv->border_width = 0;
1344 priv->resize_mode = GTK_RESIZE_PARENT;
1345 priv->reallocate_redraws = FALSE;
1349 gtk_container_destroy (GtkWidget *widget)
1351 GtkContainer *container = GTK_CONTAINER (widget);
1352 GtkContainerPrivate *priv = container->priv;
1354 if (_gtk_widget_get_resize_pending (GTK_WIDGET (container)))
1355 _gtk_container_dequeue_resize_handler (container);
1357 if (priv->focus_child)
1359 g_object_unref (priv->focus_child);
1360 priv->focus_child = NULL;
1363 /* do this before walking child widgets, to avoid
1364 * removing children from focus chain one by one.
1366 if (priv->has_focus_chain)
1367 gtk_container_unset_focus_chain (container);
1369 gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
1371 GTK_WIDGET_CLASS (parent_class)->destroy (widget);
1375 gtk_container_set_property (GObject *object,
1377 const GValue *value,
1380 GtkContainer *container = GTK_CONTAINER (object);
1384 case PROP_BORDER_WIDTH:
1385 gtk_container_set_border_width (container, g_value_get_uint (value));
1387 case PROP_RESIZE_MODE:
1388 gtk_container_set_resize_mode (container, g_value_get_enum (value));
1391 gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
1394 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1400 gtk_container_get_property (GObject *object,
1405 GtkContainer *container = GTK_CONTAINER (object);
1406 GtkContainerPrivate *priv = container->priv;
1410 case PROP_BORDER_WIDTH:
1411 g_value_set_uint (value, priv->border_width);
1413 case PROP_RESIZE_MODE:
1414 g_value_set_enum (value, priv->resize_mode);
1417 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1423 * gtk_container_set_border_width:
1424 * @container: a #GtkContainer
1425 * @border_width: amount of blank space to leave <emphasis>outside</emphasis>
1426 * the container. Valid values are in the range 0-65535 pixels.
1428 * Sets the border width of the container.
1430 * The border width of a container is the amount of space to leave
1431 * around the outside of the container. The only exception to this is
1432 * #GtkWindow; because toplevel windows can't leave space outside,
1433 * they leave the space inside. The border is added on all sides of
1434 * the container. To add space to only one side, one approach is to
1435 * create a #GtkAlignment widget, call gtk_widget_set_size_request()
1436 * to give it a size, and place it on the side of the container as
1440 gtk_container_set_border_width (GtkContainer *container,
1443 GtkContainerPrivate *priv;
1445 g_return_if_fail (GTK_IS_CONTAINER (container));
1447 priv = container->priv;
1449 if (priv->border_width != border_width)
1451 priv->border_width = border_width;
1452 g_object_notify (G_OBJECT (container), "border-width");
1454 if (gtk_widget_get_realized (GTK_WIDGET (container)))
1455 gtk_widget_queue_resize (GTK_WIDGET (container));
1460 * gtk_container_get_border_width:
1461 * @container: a #GtkContainer
1463 * Retrieves the border width of the container. See
1464 * gtk_container_set_border_width().
1466 * Return value: the current border width
1469 gtk_container_get_border_width (GtkContainer *container)
1471 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
1473 return container->priv->border_width;
1477 * gtk_container_add:
1478 * @container: a #GtkContainer
1479 * @widget: a widget to be placed inside @container
1481 * Adds @widget to @container. Typically used for simple containers
1482 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
1483 * layout containers such as #GtkBox or #GtkGrid, this function will
1484 * pick default packing parameters that may not be correct. So
1485 * consider functions such as gtk_box_pack_start() and
1486 * gtk_grid_attach() as an alternative to gtk_container_add() in
1487 * those cases. A widget may be added to only one container at a time;
1488 * you can't place the same widget inside two different containers.
1491 gtk_container_add (GtkContainer *container,
1496 g_return_if_fail (GTK_IS_CONTAINER (container));
1497 g_return_if_fail (GTK_IS_WIDGET (widget));
1499 parent = gtk_widget_get_parent (widget);
1503 g_warning ("Attempting to add a widget with type %s to a container of "
1504 "type %s, but the widget is already inside a container of type %s, "
1505 "please use gtk_widget_reparent()" ,
1506 g_type_name (G_OBJECT_TYPE (widget)),
1507 g_type_name (G_OBJECT_TYPE (container)),
1508 g_type_name (G_OBJECT_TYPE (parent)));
1512 g_signal_emit (container, container_signals[ADD], 0, widget);
1516 * gtk_container_remove:
1517 * @container: a #GtkContainer
1518 * @widget: a current child of @container
1520 * Removes @widget from @container. @widget must be inside @container.
1521 * Note that @container will own a reference to @widget, and that this
1522 * may be the last reference held; so removing a widget from its
1523 * container can destroy that widget. If you want to use @widget
1524 * again, you need to add a reference to it while it's not inside
1525 * a container, using g_object_ref(). If you don't want to use @widget
1526 * again it's usually more efficient to simply destroy it directly
1527 * using gtk_widget_destroy() since this will remove it from the
1528 * container and help break any circular reference count cycles.
1531 gtk_container_remove (GtkContainer *container,
1534 g_return_if_fail (GTK_IS_CONTAINER (container));
1535 g_return_if_fail (GTK_IS_WIDGET (widget));
1536 g_return_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (container) || GTK_IS_ASSISTANT (container));
1538 g_signal_emit (container, container_signals[REMOVE], 0, widget);
1542 _gtk_container_dequeue_resize_handler (GtkContainer *container)
1544 g_return_if_fail (GTK_IS_CONTAINER (container));
1545 g_return_if_fail (_gtk_widget_get_resize_pending (GTK_WIDGET (container)));
1547 container_resize_queue = g_slist_remove (container_resize_queue, container);
1548 _gtk_widget_set_resize_pending (GTK_WIDGET (container), FALSE);
1552 * gtk_container_set_resize_mode:
1553 * @container: a #GtkContainer
1554 * @resize_mode: the new resize mode
1556 * Sets the resize mode for the container.
1558 * The resize mode of a container determines whether a resize request
1559 * will be passed to the container's parent, queued for later execution
1560 * or executed immediately.
1563 gtk_container_set_resize_mode (GtkContainer *container,
1564 GtkResizeMode resize_mode)
1566 GtkContainerPrivate *priv;
1568 g_return_if_fail (GTK_IS_CONTAINER (container));
1569 g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
1571 priv = container->priv;
1573 if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
1574 resize_mode == GTK_RESIZE_PARENT)
1576 resize_mode = GTK_RESIZE_QUEUE;
1579 if (priv->resize_mode != resize_mode)
1581 priv->resize_mode = resize_mode;
1583 gtk_widget_queue_resize (GTK_WIDGET (container));
1584 g_object_notify (G_OBJECT (container), "resize-mode");
1589 * gtk_container_get_resize_mode:
1590 * @container: a #GtkContainer
1592 * Returns the resize mode for the container. See
1593 * gtk_container_set_resize_mode ().
1595 * Return value: the current resize mode
1598 gtk_container_get_resize_mode (GtkContainer *container)
1600 g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
1602 return container->priv->resize_mode;
1606 * gtk_container_set_reallocate_redraws:
1607 * @container: a #GtkContainer
1608 * @needs_redraws: the new value for the container's @reallocate_redraws flag
1610 * Sets the @reallocate_redraws flag of the container to the given value.
1612 * Containers requesting reallocation redraws get automatically
1613 * redrawn if any of their children changed allocation.
1616 gtk_container_set_reallocate_redraws (GtkContainer *container,
1617 gboolean needs_redraws)
1619 g_return_if_fail (GTK_IS_CONTAINER (container));
1621 container->priv->reallocate_redraws = needs_redraws ? TRUE : FALSE;
1625 gtk_container_idle_sizer (gpointer data)
1628 gint64 current_time;
1630 /* we may be invoked with a container_resize_queue of NULL, because
1631 * queue_resize could have been adding an extra idle function while
1632 * the queue still got processed. we better just ignore such case
1633 * than trying to explicitely work around them with some extra flags,
1634 * since it doesn't cause any actual harm.
1637 /* We validate the style contexts in a single loop before even trying
1638 * to handle resizes instead of doing validations inline.
1639 * This is mostly necessary for compatibility reasons with old code,
1640 * because size_allocate functions often change styles and so could
1641 * cause infinite loops in this function.
1643 current_time = g_get_monotonic_time ();
1644 for (slist = container_resize_queue; slist; slist = slist->next)
1646 _gtk_style_context_validate (gtk_widget_get_style_context (slist->data),
1651 while (container_resize_queue)
1655 slist = container_resize_queue;
1656 container_resize_queue = slist->next;
1657 widget = slist->data;
1658 g_slist_free_1 (slist);
1660 _gtk_widget_set_resize_pending (widget, FALSE);
1661 gtk_container_check_resize (GTK_CONTAINER (widget));
1664 gdk_window_process_all_updates ();
1670 _gtk_container_queue_resize_handler (GtkContainer *container)
1674 g_return_if_fail (GTK_IS_RESIZE_CONTAINER (container));
1676 widget = GTK_WIDGET (container);
1678 if (gtk_widget_get_visible (widget) &&
1679 (gtk_widget_is_toplevel (widget) ||
1680 gtk_widget_get_realized (widget)))
1682 switch (container->priv->resize_mode)
1684 case GTK_RESIZE_QUEUE:
1685 if (!_gtk_widget_get_resize_pending (widget))
1687 _gtk_widget_set_resize_pending (widget, TRUE);
1688 if (container_resize_queue == NULL)
1689 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1690 gtk_container_idle_sizer,
1692 container_resize_queue = g_slist_prepend (container_resize_queue, container);
1696 case GTK_RESIZE_IMMEDIATE:
1697 _gtk_style_context_validate (gtk_widget_get_style_context (widget),
1698 g_get_monotonic_time (),
1700 gtk_container_check_resize (container);
1702 case GTK_RESIZE_PARENT:
1704 g_assert_not_reached ();
1711 _gtk_container_queue_resize_internal (GtkContainer *container,
1712 gboolean invalidate_only)
1716 g_return_if_fail (GTK_IS_CONTAINER (container));
1718 widget = GTK_WIDGET (container);
1722 _gtk_widget_set_alloc_needed (widget, TRUE);
1723 _gtk_widget_set_width_request_needed (widget, TRUE);
1724 _gtk_widget_set_height_request_needed (widget, TRUE);
1726 if (GTK_IS_RESIZE_CONTAINER (widget))
1729 widget = gtk_widget_get_parent (widget);
1733 if (widget && !invalidate_only)
1734 _gtk_container_queue_resize_handler (GTK_CONTAINER (widget));
1738 * _gtk_container_queue_resize:
1739 * @container: a #GtkContainer
1741 * Determines the "resize container" in the hierarchy above this container
1742 * (typically the toplevel, but other containers can be set as resize
1743 * containers with gtk_container_set_resize_mode()), marks the container
1744 * and all parents up to and including the resize container as needing
1745 * to have sizes recompted, and if necessary adds the resize container
1746 * to the queue of containers that will be resized out at idle.
1749 _gtk_container_queue_resize (GtkContainer *container)
1751 _gtk_container_queue_resize_internal (container, FALSE);
1755 * _gtk_container_resize_invalidate:
1756 * @container: a #GtkContainer
1758 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1759 * actually queue the resize container for resize.
1762 _gtk_container_resize_invalidate (GtkContainer *container)
1764 _gtk_container_queue_resize_internal (container, TRUE);
1768 gtk_container_check_resize (GtkContainer *container)
1770 g_return_if_fail (GTK_IS_CONTAINER (container));
1772 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1776 gtk_container_real_check_resize (GtkContainer *container)
1778 GtkWidget *widget = GTK_WIDGET (container);
1779 GtkAllocation allocation;
1780 GtkRequisition requisition;
1782 gtk_widget_get_preferred_size (widget,
1783 &requisition, NULL);
1784 gtk_widget_get_allocation (widget, &allocation);
1786 if (requisition.width > allocation.width ||
1787 requisition.height > allocation.height)
1789 if (GTK_IS_RESIZE_CONTAINER (container))
1791 gtk_widget_size_allocate (widget, &allocation);
1792 gtk_widget_set_allocation (widget, &allocation);
1795 gtk_widget_queue_resize (widget);
1799 gtk_container_resize_children (container);
1803 /* The container hasn't changed size but one of its children
1804 * queued a resize request. Which means that the allocation
1805 * is not sufficient for the requisition of some child.
1806 * We've already performed a size request at this point,
1807 * so we simply need to reallocate and let the allocation
1808 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1811 gtk_container_resize_children (GtkContainer *container)
1813 GtkAllocation allocation;
1816 /* resizing invariants:
1817 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1818 * containers that have an idle sizer pending must be flagged with
1821 g_return_if_fail (GTK_IS_CONTAINER (container));
1823 widget = GTK_WIDGET (container);
1824 gtk_widget_get_allocation (widget, &allocation);
1826 gtk_widget_size_allocate (widget, &allocation);
1827 gtk_widget_set_allocation (widget, &allocation);
1831 gtk_container_adjust_size_request (GtkWidget *widget,
1832 GtkOrientation orientation,
1836 GtkContainer *container;
1838 container = GTK_CONTAINER (widget);
1840 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1844 border_width = container->priv->border_width;
1846 *minimum_size += border_width * 2;
1847 *natural_size += border_width * 2;
1850 /* chain up last so gtk_widget_set_size_request() values
1851 * will have a chance to overwrite our border width.
1853 parent_class->adjust_size_request (widget, orientation,
1854 minimum_size, natural_size);
1858 gtk_container_adjust_size_allocation (GtkWidget *widget,
1859 GtkOrientation orientation,
1862 gint *allocated_pos,
1863 gint *allocated_size)
1865 GtkContainer *container;
1868 container = GTK_CONTAINER (widget);
1870 if (!GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1872 parent_class->adjust_size_allocation (widget, orientation,
1873 minimum_size, natural_size, allocated_pos,
1878 border_width = container->priv->border_width;
1880 *allocated_size -= border_width * 2;
1882 /* If we get a pathological too-small allocation to hold
1883 * even the border width, leave all allocation to the actual
1884 * widget, and leave x,y unchanged. (GtkWidget's min size is
1885 * 1x1 if you're wondering why <1 and not <0)
1887 * As long as we have space, set x,y properly.
1890 if (*allocated_size < 1)
1892 *allocated_size += border_width * 2;
1896 *allocated_pos += border_width;
1897 *minimum_size -= border_width * 2;
1898 *natural_size -= border_width * 2;
1901 /* Chain up to GtkWidgetClass *after* removing our border width from
1902 * the proposed allocation size. This is because it's possible that the
1903 * widget was allocated more space than it needs in a said orientation,
1904 * if GtkWidgetClass does any alignments and thus limits the size to the
1905 * natural size... then we need that to be done *after* removing any margins
1906 * and padding values.
1908 parent_class->adjust_size_allocation (widget, orientation,
1909 minimum_size, natural_size, allocated_pos,
1919 count_request_modes (GtkWidget *widget,
1920 RequestModeCount *count)
1922 GtkSizeRequestMode mode = gtk_widget_get_request_mode (widget);
1926 case GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH:
1929 case GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT:
1932 case GTK_SIZE_REQUEST_CONSTANT_SIZE:
1938 static GtkSizeRequestMode
1939 gtk_container_get_request_mode (GtkWidget *widget)
1941 GtkContainer *container = GTK_CONTAINER (widget);
1942 GtkContainerPrivate *priv = container->priv;
1944 /* Recalculate the request mode of the children by majority
1945 * vote whenever the internal content changes */
1946 if (_gtk_widget_get_width_request_needed (widget) ||
1947 _gtk_widget_get_height_request_needed (widget))
1949 RequestModeCount count = { 0, 0 };
1951 gtk_container_forall (container, (GtkCallback)count_request_modes, &count);
1953 if (!count.hfw && !count.wfh)
1954 priv->request_mode = GTK_SIZE_REQUEST_CONSTANT_SIZE;
1956 priv->request_mode = count.wfh > count.hfw ?
1957 GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT :
1958 GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1961 return priv->request_mode;
1965 * gtk_container_class_handle_border_width:
1966 * @klass: the class struct of a #GtkContainer subclass
1968 * Modifies a subclass of #GtkContainerClass to automatically add and
1969 * remove the border-width setting on GtkContainer. This allows the
1970 * subclass to ignore the border width in its size request and
1971 * allocate methods. The intent is for a subclass to invoke this
1972 * in its class_init function.
1974 * gtk_container_class_handle_border_width() is necessary because it
1975 * would break API too badly to make this behavior the default. So
1976 * subclasses must "opt in" to the parent class handling border_width
1980 gtk_container_class_handle_border_width (GtkContainerClass *klass)
1982 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
1984 klass->_handle_border_width = TRUE;
1988 * gtk_container_forall:
1989 * @container: a #GtkContainer
1990 * @callback: (scope call) (closure callback_data): a callback
1991 * @callback_data: callback user data
1993 * Invokes @callback on each child of @container, including children
1994 * that are considered "internal" (implementation details of the
1995 * container). "Internal" children generally weren't added by the user
1996 * of the container, but were added by the container implementation
1997 * itself. Most applications should use gtk_container_foreach(),
1998 * rather than gtk_container_forall().
2003 gtk_container_forall (GtkContainer *container,
2004 GtkCallback callback,
2005 gpointer callback_data)
2007 GtkContainerClass *class;
2009 g_return_if_fail (GTK_IS_CONTAINER (container));
2010 g_return_if_fail (callback != NULL);
2012 class = GTK_CONTAINER_GET_CLASS (container);
2015 class->forall (container, TRUE, callback, callback_data);
2019 * gtk_container_foreach:
2020 * @container: a #GtkContainer
2021 * @callback: (scope call): a callback
2022 * @callback_data: callback user data
2024 * Invokes @callback on each non-internal child of @container. See
2025 * gtk_container_forall() for details on what constitutes an
2026 * "internal" child. Most applications should use
2027 * gtk_container_foreach(), rather than gtk_container_forall().
2030 gtk_container_foreach (GtkContainer *container,
2031 GtkCallback callback,
2032 gpointer callback_data)
2034 GtkContainerClass *class;
2036 g_return_if_fail (GTK_IS_CONTAINER (container));
2037 g_return_if_fail (callback != NULL);
2039 class = GTK_CONTAINER_GET_CLASS (container);
2042 class->forall (container, FALSE, callback, callback_data);
2046 * gtk_container_set_focus_child:
2047 * @container: a #GtkContainer
2048 * @child: (allow-none): a #GtkWidget, or %NULL
2050 * Sets, or unsets if @child is %NULL, the focused child of @container.
2052 * This function emits the GtkContainer::set_focus_child signal of
2053 * @container. Implementations of #GtkContainer can override the
2054 * default behaviour by overriding the class closure of this signal.
2056 * This is function is mostly meant to be used by widgets. Applications can use
2057 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
2060 gtk_container_set_focus_child (GtkContainer *container,
2063 g_return_if_fail (GTK_IS_CONTAINER (container));
2065 g_return_if_fail (GTK_IS_WIDGET (child));
2067 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
2071 * gtk_container_get_focus_child:
2072 * @container: a #GtkContainer
2074 * Returns the current focus child widget inside @container. This is not the
2075 * currently focused widget. That can be obtained by calling
2076 * gtk_window_get_focus().
2078 * Returns: (transfer none): The child widget which will receive the
2079 * focus inside @container when the @conatiner is focussed,
2080 * or %NULL if none is set.
2085 gtk_container_get_focus_child (GtkContainer *container)
2087 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2089 return container->priv->focus_child;
2093 * gtk_container_get_children:
2094 * @container: a #GtkContainer
2096 * Returns the container's non-internal children. See
2097 * gtk_container_forall() for details on what constitutes an "internal" child.
2099 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
2102 gtk_container_get_children (GtkContainer *container)
2104 GList *children = NULL;
2106 gtk_container_foreach (container,
2107 gtk_container_children_callback,
2110 return g_list_reverse (children);
2114 gtk_container_child_position_callback (GtkWidget *widget,
2115 gpointer client_data)
2121 } *data = client_data;
2124 if (data->child == widget)
2125 data->index = data->i;
2129 gtk_container_child_default_composite_name (GtkContainer *container,
2139 /* fallback implementation */
2143 gtk_container_forall (container,
2144 gtk_container_child_position_callback,
2147 name = g_strdup_printf ("%s-%u",
2148 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2155 _gtk_container_child_composite_name (GtkContainer *container,
2158 gboolean composite_child;
2160 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2161 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2162 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2164 g_object_get (child, "composite-child", &composite_child, NULL);
2165 if (composite_child)
2167 static GQuark quark_composite_name = 0;
2170 if (!quark_composite_name)
2171 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2173 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2176 GtkContainerClass *class;
2178 class = GTK_CONTAINER_GET_CLASS (container);
2179 if (class->composite_name)
2180 name = class->composite_name (container, child);
2183 name = g_strdup (name);
2194 } ComputeExpandData;
2197 gtk_container_compute_expand_callback (GtkWidget *widget,
2198 gpointer client_data)
2200 ComputeExpandData *data = client_data;
2202 /* note that we don't get_expand on the child if we already know we
2203 * have to expand, so we only recurse into children until we find
2204 * one that expands and then we basically don't do any more
2205 * work. This means that we can leave some children in a
2206 * need_compute_expand state, which is fine, as long as GtkWidget
2207 * doesn't rely on an invariant that "if a child has
2208 * need_compute_expand, its parents also do"
2210 * gtk_widget_compute_expand() always returns FALSE if the
2211 * child is !visible so that's taken care of.
2213 data->hexpand = data->hexpand ||
2214 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2216 data->vexpand = data->vexpand ||
2217 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2221 gtk_container_compute_expand (GtkWidget *widget,
2222 gboolean *hexpand_p,
2223 gboolean *vexpand_p)
2225 ComputeExpandData data;
2227 data.hexpand = FALSE;
2228 data.vexpand = FALSE;
2230 gtk_container_forall (GTK_CONTAINER (widget),
2231 gtk_container_compute_expand_callback,
2234 *hexpand_p = data.hexpand;
2235 *vexpand_p = data.vexpand;
2239 gtk_container_real_set_focus_child (GtkContainer *container,
2242 GtkContainerPrivate *priv;
2244 g_return_if_fail (GTK_IS_CONTAINER (container));
2245 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2247 priv = container->priv;
2249 if (child != priv->focus_child)
2251 if (priv->focus_child)
2252 g_object_unref (priv->focus_child);
2253 priv->focus_child = child;
2254 if (priv->focus_child)
2255 g_object_ref (priv->focus_child);
2259 /* check for h/v adjustments
2261 if (priv->focus_child)
2263 GtkAdjustment *hadj;
2264 GtkAdjustment *vadj;
2265 GtkAllocation allocation;
2266 GtkWidget *focus_child;
2269 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2270 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2274 focus_child = priv->focus_child;
2275 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2277 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2280 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2283 gtk_widget_get_allocation (priv->focus_child, &allocation);
2287 gtk_widget_get_allocation (focus_child, &allocation);
2290 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2293 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2299 get_focus_chain (GtkContainer *container)
2301 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2304 /* same as gtk_container_get_children, except it includes internals
2307 _gtk_container_get_all_children (GtkContainer *container)
2309 GList *children = NULL;
2311 gtk_container_forall (container,
2312 gtk_container_children_callback,
2318 static GtkWidgetPath *
2319 gtk_container_real_get_path_for_child (GtkContainer *container,
2322 GtkStyleContext *context;
2323 GtkWidgetPath *path;
2326 context = gtk_widget_get_style_context (GTK_WIDGET (container));
2327 path = _gtk_widget_create_path (GTK_WIDGET (container));
2329 /* Copy any permanent classes to the path */
2330 classes = gtk_style_context_list_classes (context);
2337 classes = classes->next;
2339 gtk_widget_path_iter_add_class (path, -1, cur->data);
2340 g_list_free_1 (cur);
2343 gtk_widget_path_append_for_widget (path, child);
2349 gtk_container_focus (GtkWidget *widget,
2350 GtkDirectionType direction)
2353 GList *sorted_children;
2355 GtkContainer *container;
2356 GtkContainerPrivate *priv;
2358 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2360 container = GTK_CONTAINER (widget);
2361 priv = container->priv;
2365 if (gtk_widget_get_can_focus (widget))
2367 if (!gtk_widget_has_focus (widget))
2369 gtk_widget_grab_focus (widget);
2375 /* Get a list of the containers children, allowing focus
2376 * chain to override.
2378 if (priv->has_focus_chain)
2379 children = g_list_copy (get_focus_chain (container));
2381 children = _gtk_container_get_all_children (container);
2383 if (priv->has_focus_chain &&
2384 (direction == GTK_DIR_TAB_FORWARD ||
2385 direction == GTK_DIR_TAB_BACKWARD))
2387 sorted_children = g_list_copy (children);
2389 if (direction == GTK_DIR_TAB_BACKWARD)
2390 sorted_children = g_list_reverse (sorted_children);
2393 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2395 return_val = gtk_container_focus_move (container, sorted_children, direction);
2397 g_list_free (sorted_children);
2398 g_list_free (children);
2405 tab_compare (gconstpointer a,
2409 GtkAllocation child1_allocation, child2_allocation;
2410 const GtkWidget *child1 = a;
2411 const GtkWidget *child2 = b;
2412 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2415 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2416 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2418 y1 = child1_allocation.y + child1_allocation.height / 2;
2419 y2 = child2_allocation.y + child2_allocation.height / 2;
2423 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2424 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2426 if (text_direction == GTK_TEXT_DIR_RTL)
2427 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2429 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2432 return (y1 < y2) ? -1 : 1;
2436 gtk_container_focus_sort_tab (GtkContainer *container,
2438 GtkDirectionType direction,
2439 GtkWidget *old_focus)
2441 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2442 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2444 /* if we are going backwards then reverse the order
2447 if (direction == GTK_DIR_TAB_BACKWARD)
2448 children = g_list_reverse (children);
2453 /* Get coordinates of @widget's allocation with respect to
2454 * allocation of @container.
2457 get_allocation_coords (GtkContainer *container,
2459 GdkRectangle *allocation)
2461 gtk_widget_get_allocation (widget, allocation);
2463 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2464 0, 0, &allocation->x, &allocation->y);
2467 /* Look for a child in @children that is intermediate between
2468 * the focus widget and container. This widget, if it exists,
2469 * acts as the starting widget for focus navigation.
2472 find_old_focus (GtkContainer *container,
2475 GList *tmp_list = children;
2478 GtkWidget *child = tmp_list->data;
2479 GtkWidget *widget = child;
2481 while (widget && widget != (GtkWidget *)container)
2485 parent = gtk_widget_get_parent (widget);
2487 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2496 tmp_list = tmp_list->next;
2503 old_focus_coords (GtkContainer *container,
2504 GdkRectangle *old_focus_rect)
2506 GtkWidget *widget = GTK_WIDGET (container);
2507 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2508 GtkWidget *old_focus;
2510 if (GTK_IS_WINDOW (toplevel))
2512 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2514 return get_allocation_coords (container, old_focus, old_focus_rect);
2520 typedef struct _CompareInfo CompareInfo;
2524 GtkContainer *container;
2531 up_down_compare (gconstpointer a,
2535 GdkRectangle allocation1;
2536 GdkRectangle allocation2;
2537 CompareInfo *compare = data;
2540 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2541 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2543 y1 = allocation1.y + allocation1.height / 2;
2544 y2 = allocation2.y + allocation2.height / 2;
2548 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2549 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2551 if (compare->reverse)
2552 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2554 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2557 return (y1 < y2) ? -1 : 1;
2561 gtk_container_focus_sort_up_down (GtkContainer *container,
2563 GtkDirectionType direction,
2564 GtkWidget *old_focus)
2566 CompareInfo compare;
2568 GdkRectangle old_allocation;
2570 compare.container = container;
2571 compare.reverse = (direction == GTK_DIR_UP);
2574 old_focus = find_old_focus (container, children);
2576 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2582 /* Delete widgets from list that don't match minimum criteria */
2584 compare_x1 = old_allocation.x;
2585 compare_x2 = old_allocation.x + old_allocation.width;
2587 if (direction == GTK_DIR_UP)
2588 compare_y = old_allocation.y;
2590 compare_y = old_allocation.y + old_allocation.height;
2592 tmp_list = children;
2595 GtkWidget *child = tmp_list->data;
2596 GList *next = tmp_list->next;
2597 gint child_x1, child_x2;
2598 GdkRectangle child_allocation;
2600 if (child != old_focus)
2602 if (get_allocation_coords (container, child, &child_allocation))
2604 child_x1 = child_allocation.x;
2605 child_x2 = child_allocation.x + child_allocation.width;
2607 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2608 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2609 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2611 children = g_list_delete_link (children, tmp_list);
2615 children = g_list_delete_link (children, tmp_list);
2621 compare.x = (compare_x1 + compare_x2) / 2;
2622 compare.y = old_allocation.y + old_allocation.height / 2;
2626 /* No old focus widget, need to figure out starting x,y some other way
2628 GtkAllocation allocation;
2629 GtkWidget *widget = GTK_WIDGET (container);
2630 GdkRectangle old_focus_rect;
2632 gtk_widget_get_allocation (widget, &allocation);
2634 if (old_focus_coords (container, &old_focus_rect))
2636 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2640 if (!gtk_widget_get_has_window (widget))
2641 compare.x = allocation.x + allocation.width / 2;
2643 compare.x = allocation.width / 2;
2646 if (!gtk_widget_get_has_window (widget))
2647 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2649 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2652 children = g_list_sort_with_data (children, up_down_compare, &compare);
2654 if (compare.reverse)
2655 children = g_list_reverse (children);
2661 left_right_compare (gconstpointer a,
2665 GdkRectangle allocation1;
2666 GdkRectangle allocation2;
2667 CompareInfo *compare = data;
2670 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2671 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2673 x1 = allocation1.x + allocation1.width / 2;
2674 x2 = allocation2.x + allocation2.width / 2;
2678 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2679 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2681 if (compare->reverse)
2682 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2684 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2687 return (x1 < x2) ? -1 : 1;
2691 gtk_container_focus_sort_left_right (GtkContainer *container,
2693 GtkDirectionType direction,
2694 GtkWidget *old_focus)
2696 CompareInfo compare;
2698 GdkRectangle old_allocation;
2700 compare.container = container;
2701 compare.reverse = (direction == GTK_DIR_LEFT);
2704 old_focus = find_old_focus (container, children);
2706 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2712 /* Delete widgets from list that don't match minimum criteria */
2714 compare_y1 = old_allocation.y;
2715 compare_y2 = old_allocation.y + old_allocation.height;
2717 if (direction == GTK_DIR_LEFT)
2718 compare_x = old_allocation.x;
2720 compare_x = old_allocation.x + old_allocation.width;
2722 tmp_list = children;
2725 GtkWidget *child = tmp_list->data;
2726 GList *next = tmp_list->next;
2727 gint child_y1, child_y2;
2728 GdkRectangle child_allocation;
2730 if (child != old_focus)
2732 if (get_allocation_coords (container, child, &child_allocation))
2734 child_y1 = child_allocation.y;
2735 child_y2 = child_allocation.y + child_allocation.height;
2737 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2738 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2739 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2741 children = g_list_delete_link (children, tmp_list);
2745 children = g_list_delete_link (children, tmp_list);
2751 compare.y = (compare_y1 + compare_y2) / 2;
2752 compare.x = old_allocation.x + old_allocation.width / 2;
2756 /* No old focus widget, need to figure out starting x,y some other way
2758 GtkAllocation allocation;
2759 GtkWidget *widget = GTK_WIDGET (container);
2760 GdkRectangle old_focus_rect;
2762 gtk_widget_get_allocation (widget, &allocation);
2764 if (old_focus_coords (container, &old_focus_rect))
2766 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2770 if (!gtk_widget_get_has_window (widget))
2771 compare.y = allocation.y + allocation.height / 2;
2773 compare.y = allocation.height / 2;
2776 if (!gtk_widget_get_has_window (widget))
2777 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2779 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2782 children = g_list_sort_with_data (children, left_right_compare, &compare);
2784 if (compare.reverse)
2785 children = g_list_reverse (children);
2791 * gtk_container_focus_sort:
2792 * @container: a #GtkContainer
2793 * @children: a list of descendents of @container (they don't
2794 * have to be direct children)
2795 * @direction: focus direction
2796 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2797 * to determine this automatically.
2798 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2799 * which is the only @direction we use currently,
2800 * so perhaps this argument should be removed)
2802 * Sorts @children in the correct order for focusing with
2803 * direction type @direction.
2805 * Return value: a copy of @children, sorted in correct focusing order,
2806 * with children that aren't suitable for focusing in this direction
2810 _gtk_container_focus_sort (GtkContainer *container,
2812 GtkDirectionType direction,
2813 GtkWidget *old_focus)
2815 GList *visible_children = NULL;
2819 if (gtk_widget_get_realized (children->data))
2820 visible_children = g_list_prepend (visible_children, children->data);
2821 children = children->next;
2826 case GTK_DIR_TAB_FORWARD:
2827 case GTK_DIR_TAB_BACKWARD:
2828 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2831 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2834 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2837 g_assert_not_reached ();
2843 gtk_container_focus_move (GtkContainer *container,
2845 GtkDirectionType direction)
2847 GtkContainerPrivate *priv = container->priv;
2848 GtkWidget *focus_child;
2851 focus_child = priv->focus_child;
2855 child = children->data;
2856 children = children->next;
2863 if (focus_child == child)
2867 if (gtk_widget_child_focus (child, direction))
2871 else if (gtk_widget_is_drawable (child) &&
2872 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2874 if (gtk_widget_child_focus (child, direction))
2884 gtk_container_children_callback (GtkWidget *widget,
2885 gpointer client_data)
2889 children = (GList**) client_data;
2890 *children = g_list_prepend (*children, widget);
2894 chain_widget_destroyed (GtkWidget *widget,
2897 GtkContainer *container;
2900 container = GTK_CONTAINER (user_data);
2902 chain = g_object_get_data (G_OBJECT (container),
2903 "gtk-container-focus-chain");
2905 chain = g_list_remove (chain, widget);
2907 g_signal_handlers_disconnect_by_func (widget,
2908 chain_widget_destroyed,
2911 g_object_set_data (G_OBJECT (container),
2912 I_("gtk-container-focus-chain"),
2917 * gtk_container_set_focus_chain:
2918 * @container: a #GtkContainer
2919 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2920 * the new focus chain
2922 * Sets a focus chain, overriding the one computed automatically by GTK+.
2924 * In principle each widget in the chain should be a descendant of the
2925 * container, but this is not enforced by this method, since it's allowed
2926 * to set the focus chain before you pack the widgets, or have a widget
2927 * in the chain that isn't always packed. The necessary checks are done
2928 * when the focus chain is actually traversed.
2931 gtk_container_set_focus_chain (GtkContainer *container,
2932 GList *focusable_widgets)
2936 GtkContainerPrivate *priv;
2938 g_return_if_fail (GTK_IS_CONTAINER (container));
2940 priv = container->priv;
2942 if (priv->has_focus_chain)
2943 gtk_container_unset_focus_chain (container);
2945 priv->has_focus_chain = TRUE;
2948 tmp_list = focusable_widgets;
2949 while (tmp_list != NULL)
2951 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2953 /* In principle each widget in the chain should be a descendant
2954 * of the container, but we don't want to check that here. It's
2955 * expensive and also it's allowed to set the focus chain before
2956 * you pack the widgets, or have a widget in the chain that isn't
2957 * always packed. So we check for ancestor during actual traversal.
2960 chain = g_list_prepend (chain, tmp_list->data);
2962 g_signal_connect (tmp_list->data,
2964 G_CALLBACK (chain_widget_destroyed),
2967 tmp_list = g_list_next (tmp_list);
2970 chain = g_list_reverse (chain);
2972 g_object_set_data (G_OBJECT (container),
2973 I_("gtk-container-focus-chain"),
2978 * gtk_container_get_focus_chain:
2979 * @container: a #GtkContainer
2980 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
2981 * to store the focus chain of the
2982 * container, or %NULL. You should free this list
2983 * using g_list_free() when you are done with it, however
2984 * no additional reference count is added to the
2985 * individual widgets in the focus chain.
2987 * Retrieves the focus chain of the container, if one has been
2988 * set explicitly. If no focus chain has been explicitly
2989 * set, GTK+ computes the focus chain based on the positions
2990 * of the children. In that case, GTK+ stores %NULL in
2991 * @focusable_widgets and returns %FALSE.
2993 * Return value: %TRUE if the focus chain of the container
2994 * has been set explicitly.
2997 gtk_container_get_focus_chain (GtkContainer *container,
2998 GList **focus_chain)
3000 GtkContainerPrivate *priv;
3002 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
3004 priv = container->priv;
3008 if (priv->has_focus_chain)
3009 *focus_chain = g_list_copy (get_focus_chain (container));
3011 *focus_chain = NULL;
3014 return priv->has_focus_chain;
3018 * gtk_container_unset_focus_chain:
3019 * @container: a #GtkContainer
3021 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
3024 gtk_container_unset_focus_chain (GtkContainer *container)
3026 GtkContainerPrivate *priv;
3028 g_return_if_fail (GTK_IS_CONTAINER (container));
3030 priv = container->priv;
3032 if (priv->has_focus_chain)
3037 chain = get_focus_chain (container);
3039 priv->has_focus_chain = FALSE;
3041 g_object_set_data (G_OBJECT (container),
3042 I_("gtk-container-focus-chain"),
3046 while (tmp_list != NULL)
3048 g_signal_handlers_disconnect_by_func (tmp_list->data,
3049 chain_widget_destroyed,
3052 tmp_list = g_list_next (tmp_list);
3055 g_list_free (chain);
3060 * gtk_container_set_focus_vadjustment:
3061 * @container: a #GtkContainer
3062 * @adjustment: an adjustment which should be adjusted when the focus
3063 * is moved among the descendents of @container
3065 * Hooks up an adjustment to focus handling in a container, so when a
3066 * child of the container is focused, the adjustment is scrolled to
3067 * show that widget. This function sets the vertical alignment. See
3068 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
3069 * the adjustment and gtk_container_set_focus_hadjustment() for setting
3070 * the horizontal adjustment.
3072 * The adjustments have to be in pixel units and in the same coordinate
3073 * system as the allocation for immediate children of the container.
3076 gtk_container_set_focus_vadjustment (GtkContainer *container,
3077 GtkAdjustment *adjustment)
3079 g_return_if_fail (GTK_IS_CONTAINER (container));
3081 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3084 g_object_ref (adjustment);
3086 g_object_set_qdata_full (G_OBJECT (container),
3093 * gtk_container_get_focus_vadjustment:
3094 * @container: a #GtkContainer
3096 * Retrieves the vertical focus adjustment for the container. See
3097 * gtk_container_set_focus_vadjustment().
3099 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
3100 * none has been set.
3103 gtk_container_get_focus_vadjustment (GtkContainer *container)
3105 GtkAdjustment *vadjustment;
3107 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3109 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
3115 * gtk_container_set_focus_hadjustment:
3116 * @container: a #GtkContainer
3117 * @adjustment: an adjustment which should be adjusted when the focus is
3118 * moved among the descendents of @container
3120 * Hooks up an adjustment to focus handling in a container, so when a child
3121 * of the container is focused, the adjustment is scrolled to show that
3122 * widget. This function sets the horizontal alignment.
3123 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
3124 * the adjustment and gtk_container_set_focus_vadjustment() for setting
3125 * the vertical adjustment.
3127 * The adjustments have to be in pixel units and in the same coordinate
3128 * system as the allocation for immediate children of the container.
3131 gtk_container_set_focus_hadjustment (GtkContainer *container,
3132 GtkAdjustment *adjustment)
3134 g_return_if_fail (GTK_IS_CONTAINER (container));
3136 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3139 g_object_ref (adjustment);
3141 g_object_set_qdata_full (G_OBJECT (container),
3148 * gtk_container_get_focus_hadjustment:
3149 * @container: a #GtkContainer
3151 * Retrieves the horizontal focus adjustment for the container. See
3152 * gtk_container_set_focus_hadjustment ().
3154 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3155 * none has been set.
3158 gtk_container_get_focus_hadjustment (GtkContainer *container)
3160 GtkAdjustment *hadjustment;
3162 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3164 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3171 gtk_container_show_all (GtkWidget *widget)
3173 g_return_if_fail (GTK_IS_CONTAINER (widget));
3175 gtk_container_foreach (GTK_CONTAINER (widget),
3176 (GtkCallback) gtk_widget_show_all,
3178 gtk_widget_show (widget);
3182 gtk_container_draw_child (GtkWidget *child,
3183 gpointer client_data)
3186 GtkWidget *container;
3188 } *data = client_data;
3190 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3196 gtk_container_draw (GtkWidget *widget,
3200 GtkWidget *container;
3204 data.container = widget;
3207 gtk_container_forall (GTK_CONTAINER (widget),
3208 gtk_container_draw_child,
3215 gtk_container_map_child (GtkWidget *child,
3216 gpointer client_data)
3218 if (gtk_widget_get_visible (child) &&
3219 gtk_widget_get_child_visible (child) &&
3220 !gtk_widget_get_mapped (child))
3221 gtk_widget_map (child);
3225 gtk_container_map (GtkWidget *widget)
3227 gtk_widget_set_mapped (widget, TRUE);
3229 gtk_container_forall (GTK_CONTAINER (widget),
3230 gtk_container_map_child,
3233 if (gtk_widget_get_has_window (widget))
3234 gdk_window_show (gtk_widget_get_window (widget));
3238 gtk_container_unmap (GtkWidget *widget)
3240 gtk_widget_set_mapped (widget, FALSE);
3242 /* hide our window first so user doesn't see all the child windows
3243 * vanishing one by one. (only matters these days if one of the
3244 * children has an actual native window instead of client-side
3245 * window, e.g. a GtkSocket would)
3247 if (gtk_widget_get_has_window (widget))
3248 gdk_window_hide (gtk_widget_get_window (widget));
3250 gtk_container_forall (GTK_CONTAINER (widget),
3251 (GtkCallback)gtk_widget_unmap,
3256 * gtk_container_propagate_draw:
3257 * @container: a #GtkContainer
3258 * @child: a child of @container
3259 * @cr: Cairo context as passed to the container. If you want to use @cr
3260 * in container's draw function, consider using cairo_save() and
3261 * cairo_restore() before calling this function.
3263 * When a container receives a call to the draw function, it must send
3264 * synthetic #GtkWidget::draw calls to all children that don't have their
3265 * own #GdkWindows. This function provides a convenient way of doing this.
3266 * A container, when it receives a call to its #GtkWidget::draw function,
3267 * calls gtk_container_propagate_draw() once for each child, passing in
3268 * the @cr the container received.
3270 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3271 * and deciding whether the draw needs to be sent to the child. It is a
3272 * convenient and optimized way of getting the same effect as calling
3273 * gtk_widget_draw() on the child directly.
3275 * In most cases, a container can simply either inherit the
3276 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3277 * and then chain to the ::draw implementation from #GtkContainer.
3280 gtk_container_propagate_draw (GtkContainer *container,
3284 GdkEventExpose *event;
3285 GtkAllocation allocation;
3286 GdkWindow *window, *w;
3289 g_return_if_fail (GTK_IS_CONTAINER (container));
3290 g_return_if_fail (GTK_IS_WIDGET (child));
3291 g_return_if_fail (cr != NULL);
3293 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3295 event = _gtk_cairo_get_event (cr);
3298 if (gtk_widget_get_has_window (child) ||
3299 gtk_widget_get_window (child) != event->window)
3305 /* translate coordinates. Ugly business, that. */
3306 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3308 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3318 window = gtk_widget_get_window (GTK_WIDGET (container));
3320 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3323 gdk_window_get_position (w, &wx, &wy);
3334 if (!gtk_widget_get_has_window (child))
3336 gtk_widget_get_allocation (child, &allocation);
3341 cairo_translate (cr, x, y);
3343 _gtk_widget_draw_internal (child, cr, TRUE);
3349 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3351 return container->priv->reallocate_redraws;
3355 * gtk_container_get_path_for_child:
3356 * @container: a #GtkContainer
3357 * @child: a child of @container
3359 * Returns a newly created widget path representing all the widget hierarchy
3360 * from the toplevel down to and including @child.
3362 * Returns: A newly created #GtkWidgetPath
3365 gtk_container_get_path_for_child (GtkContainer *container,
3368 GtkWidgetPath *path;
3370 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3371 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
3372 g_return_val_if_fail (container == (GtkContainer *) gtk_widget_get_parent (child), NULL);
3374 path = GTK_CONTAINER_GET_CLASS (container)->get_path_for_child (container, child);
3375 if (gtk_widget_path_get_object_type (path) != G_OBJECT_TYPE (child))
3377 g_critical ("%s %p returned a widget path for type %s, but child is %s",
3378 G_OBJECT_TYPE_NAME (container),
3380 g_type_name (gtk_widget_path_get_object_type (path)),
3381 G_OBJECT_TYPE_NAME (child));