1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 #include "gtkcontainer.h"
35 #include <gobject/gobjectnotifyqueue.c>
36 #include <gobject/gvaluecollector.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"
48 #include "gtktoolbar.h"
52 * SECTION:gtkcontainer
53 * @Short_description: Base class for widgets which contain other widgets
54 * @Title: GtkContainer
56 * A GTK+ user interface is constructed by nesting widgets inside widgets.
57 * Container widgets are the inner nodes in the resulting tree of widgets:
58 * they contain other widgets. So, for example, you might have a #GtkWindow
59 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
60 * of a textual label inside the frame, you might replace the #GtkLabel widget
61 * with a #GtkImage widget.
63 * There are two major kinds of container widgets in GTK+. Both are subclasses
64 * of the abstract GtkContainer base class.
66 * The first type of container widget has a single child widget and derives
67 * from #GtkBin. These containers are <emphasis>decorators</emphasis>, which
68 * add some kind of functionality to the child. For example, a #GtkButton makes
69 * its child into a clickable button; a #GtkFrame draws a frame around its child
70 * and a #GtkWindow places its child widget inside a top-level window.
72 * The second type of container can have more than one child; its purpose is to
73 * manage <emphasis>layout</emphasis>. This means that these containers assign
74 * sizes and positions to their children. For example, a #GtkHBox arranges its
75 * children in a horizontal row, and a #GtkTable arranges the widgets it contains
76 * in a two-dimensional grid.
78 * <refsect2 id="container-geometry-management">
79 * <title>Height for width geometry management</title>
81 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
82 * Height-for-width means that a widget can change how much vertical space it needs,
83 * depending on the amount of horizontal space that it is given (and similar for
86 * There are some things to keep in mind when implementing container widgets
87 * that make use of GTK+'s height for width geometry management system. First,
88 * it's important to note that a container must prioritize one of its
89 * dimensions, that is to say that a widget or container can only have a
90 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
91 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
92 * must be able to respond to the APIs for both dimensions, i.e. even if a
93 * widget has a request mode that is height-for-width, it is possible that
94 * its parent will request its sizes using the width-for-height APIs.
96 * To ensure that everything works properly, here are some guidelines to follow
97 * when implementing height-for-width (or width-for-height) containers.
99 * Each request mode involves 2 virtual methods. Height-for-width apis run
100 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
101 * When handling requests in the opposite #GtkSizeRequestMode it is important that
102 * every widget request at least enough space to display all of its content at all times.
104 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
105 * the container must return the height for its minimum width. This is easily achieved by
106 * simply calling the reverse apis implemented for itself as follows:
108 * <programlisting><![CDATA[
110 * foo_container_get_preferred_height (GtkWidget *widget, gint *min_height, gint *nat_height)
112 * if (i_am_in_height_for_width_mode)
116 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
117 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width,
118 * min_height, nat_height);
122 * ... many containers support both request modes, execute the real width-for-height
123 * request here by returning the collective heights of all widgets that are
124 * stacked vertically (or whatever is appropriate for this container) ...
127 * ]]></programlisting>
129 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
130 * that is height-for-width, it then only needs to return the base minimum width like so:
132 * <programlisting><![CDATA[
134 * foo_container_get_preferred_width_for_height (GtkWidget *widget, gint for_height,
135 * gint *min_width, gint *nat_width)
137 * if (i_am_in_height_for_width_mode)
139 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, min_width, nat_width);
143 * ... execute the real width-for-height request here based on the required width
144 * of the children collectively if the container were to be allocated the said height ...
147 * ]]></programlisting>
149 * Height for width requests are generally implemented in terms of a virtual allocation
150 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
151 * would implement the <function>get_preferred_height_for_width()</function> virtual function by first calling
152 * gtk_widget_get_preferred_width() for each of its children.
154 * For each potential group of children that are lined up horizontally, the values returned by
155 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures.
156 * Any child spacing should be removed from the input @for_width and then the collective size should be
157 * allocated using the gtk_distribute_natural_allocation() convenience function.
159 * The container will then move on to request the preferred height for each child by using
160 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
162 * To allocate a height-for-width container, it's again important
163 * to consider that a container must prioritize one dimension over the other. So if
164 * a container is a height-for-width container it must first allocate all widgets horizontally
165 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
166 * extra space (if and where appropriate) for the widget to expand.
168 * After adding all the expand space, the container assumes it was allocated sufficient
169 * height to fit all of its content. At this time, the container must use the total horizontal sizes
170 * of each widget to request the height-for-width of each of its children and store the requests in a
171 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
172 * be generalized into the heights and widths of rows and columns).
173 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
174 * while this time considering the allocated height of the widget minus any vertical spacing
175 * that the container adds. Then vertical expand space should be added where appropriate and available
176 * and the container should go on to actually allocating the child widgets.
178 * See <link linkend="geometry-management">GtkWidget's geometry management section</link>
179 * to learn more about implementing height-for-width geometry management for widgets.
182 * <refsect2 id="child-properties">
183 * <title>Child properties</title>
185 * GtkContainer introduces <emphasis>child properties</emphasis>.
186 * These are object properties that are not specific
187 * to either the container or the contained widget, but rather to their relation.
188 * Typical examples of child properties are the position or pack-type of a widget
189 * which is contained in a #GtkBox.
191 * Use gtk_container_class_install_child_property() to install child properties
192 * for a container class and gtk_container_class_find_child_property() or
193 * gtk_container_class_list_child_properties() to get information about existing
196 * To set the value of a child property, use gtk_container_child_set_property(),
197 * gtk_container_child_set() or gtk_container_child_set_valist().
198 * To obtain the value of a child property, use
199 * gtk_container_child_get_property(), gtk_container_child_get() or
200 * gtk_container_child_get_valist(). To emit notification about child property
201 * changes, use gtk_widget_child_notify().
204 * <refsect2 id="GtkContainer-BUILDER-UI">
205 * <title>GtkContainer as GtkBuildable</title>
207 * The GtkContainer implementation of the GtkBuildable interface
208 * supports a <packing> element for children, which can
209 * contain multiple <property> elements that specify
210 * child properties for the child.
212 * <title>Child properties in UI definitions</title>
213 * <programlisting><![CDATA[
214 * <object class="GtkVBox">
216 * <object class="GtkLabel"/>
218 * <property name="pack-type">start</property>
222 * ]]></programlisting>
224 * Since 2.16, child properties can also be marked as translatable using
225 * the same "translatable", "comments" and "context" attributes that are used
226 * for regular properties.
232 struct _GtkContainerPrivate
234 GtkWidget *focus_child;
236 guint border_width : 16;
238 guint has_focus_chain : 1;
239 guint need_resize : 1;
240 guint reallocate_redraws : 1;
241 guint resize_mode : 2;
242 guint request_mode : 2;
260 #define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
261 #define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
264 /* --- prototypes --- */
265 static void gtk_container_base_class_init (GtkContainerClass *klass);
266 static void gtk_container_base_class_finalize (GtkContainerClass *klass);
267 static void gtk_container_class_init (GtkContainerClass *klass);
268 static void gtk_container_init (GtkContainer *container);
269 static void gtk_container_destroy (GtkWidget *widget);
270 static void gtk_container_set_property (GObject *object,
274 static void gtk_container_get_property (GObject *object,
278 static void gtk_container_add_unimplemented (GtkContainer *container,
280 static void gtk_container_remove_unimplemented (GtkContainer *container,
282 static void gtk_container_real_check_resize (GtkContainer *container);
283 static void gtk_container_compute_expand (GtkWidget *widget,
285 gboolean *vexpand_p);
286 static gboolean gtk_container_focus (GtkWidget *widget,
287 GtkDirectionType direction);
288 static void gtk_container_real_set_focus_child (GtkContainer *container,
291 static gboolean gtk_container_focus_move (GtkContainer *container,
293 GtkDirectionType direction);
294 static void gtk_container_children_callback (GtkWidget *widget,
295 gpointer client_data);
296 static void gtk_container_show_all (GtkWidget *widget);
297 static gint gtk_container_draw (GtkWidget *widget,
299 static void gtk_container_map (GtkWidget *widget);
300 static void gtk_container_unmap (GtkWidget *widget);
301 static void gtk_container_adjust_size_request (GtkWidget *widget,
302 GtkOrientation orientation,
305 static void gtk_container_adjust_size_allocation (GtkWidget *widget,
306 GtkOrientation orientation,
310 gint *allocated_size);
311 static GtkSizeRequestMode gtk_container_get_request_mode (GtkWidget *widget);
313 static gchar* gtk_container_child_default_composite_name (GtkContainer *container,
316 static GtkWidgetPath * gtk_container_real_get_path_for_child (GtkContainer *container,
320 static void gtk_container_buildable_init (GtkBuildableIface *iface);
321 static void gtk_container_buildable_add_child (GtkBuildable *buildable,
325 static gboolean gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
328 const gchar *tagname,
329 GMarkupParser *parser,
331 static void gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
334 const gchar *tagname,
338 /* --- variables --- */
339 static const gchar vadjustment_key[] = "gtk-vadjustment";
340 static guint vadjustment_key_id = 0;
341 static const gchar hadjustment_key[] = "gtk-hadjustment";
342 static guint hadjustment_key_id = 0;
343 static GSList *container_resize_queue = NULL;
344 static guint container_signals[LAST_SIGNAL] = { 0 };
345 static GtkWidgetClass *parent_class = NULL;
346 extern GParamSpecPool *_gtk_widget_child_property_pool;
347 extern GObjectNotifyContext *_gtk_widget_child_property_notify_context;
348 static GtkBuildableIface *parent_buildable_iface;
351 /* --- functions --- */
353 gtk_container_get_type (void)
355 static GType container_type = 0;
359 const GTypeInfo container_info =
361 sizeof (GtkContainerClass),
362 (GBaseInitFunc) gtk_container_base_class_init,
363 (GBaseFinalizeFunc) gtk_container_base_class_finalize,
364 (GClassInitFunc) gtk_container_class_init,
365 NULL /* class_finalize */,
366 NULL /* class_data */,
367 sizeof (GtkContainer),
369 (GInstanceInitFunc) gtk_container_init,
370 NULL, /* value_table */
373 const GInterfaceInfo buildable_info =
375 (GInterfaceInitFunc) gtk_container_buildable_init,
381 g_type_register_static (GTK_TYPE_WIDGET, I_("GtkContainer"),
382 &container_info, G_TYPE_FLAG_ABSTRACT);
384 g_type_add_interface_static (container_type,
390 return container_type;
394 gtk_container_base_class_init (GtkContainerClass *class)
396 /* reset instance specifc class fields that don't get inherited */
397 class->set_child_property = NULL;
398 class->get_child_property = NULL;
402 gtk_container_base_class_finalize (GtkContainerClass *class)
406 list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class));
407 for (node = list; node; node = node->next)
409 GParamSpec *pspec = node->data;
411 g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec);
412 PARAM_SPEC_SET_PARAM_ID (pspec, 0);
413 g_param_spec_unref (pspec);
419 gtk_container_class_init (GtkContainerClass *class)
421 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
422 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
424 parent_class = g_type_class_peek_parent (class);
426 vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
427 hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
429 gobject_class->set_property = gtk_container_set_property;
430 gobject_class->get_property = gtk_container_get_property;
432 widget_class->destroy = gtk_container_destroy;
433 widget_class->compute_expand = gtk_container_compute_expand;
434 widget_class->show_all = gtk_container_show_all;
435 widget_class->draw = gtk_container_draw;
436 widget_class->map = gtk_container_map;
437 widget_class->unmap = gtk_container_unmap;
438 widget_class->focus = gtk_container_focus;
440 widget_class->adjust_size_request = gtk_container_adjust_size_request;
441 widget_class->adjust_size_allocation = gtk_container_adjust_size_allocation;
442 widget_class->get_request_mode = gtk_container_get_request_mode;
444 class->add = gtk_container_add_unimplemented;
445 class->remove = gtk_container_remove_unimplemented;
446 class->check_resize = gtk_container_real_check_resize;
447 class->forall = NULL;
448 class->set_focus_child = gtk_container_real_set_focus_child;
449 class->child_type = NULL;
450 class->composite_name = gtk_container_child_default_composite_name;
451 class->get_path_for_child = gtk_container_real_get_path_for_child;
453 g_object_class_install_property (gobject_class,
455 g_param_spec_enum ("resize-mode",
457 P_("Specify how resize events are handled"),
458 GTK_TYPE_RESIZE_MODE,
460 GTK_PARAM_READWRITE));
461 g_object_class_install_property (gobject_class,
463 g_param_spec_uint ("border-width",
465 P_("The width of the empty border outside the containers children"),
469 GTK_PARAM_READWRITE));
470 g_object_class_install_property (gobject_class,
472 g_param_spec_object ("child",
474 P_("Can be used to add a new child to the container"),
476 GTK_PARAM_WRITABLE));
477 container_signals[ADD] =
478 g_signal_new (I_("add"),
479 G_OBJECT_CLASS_TYPE (gobject_class),
481 G_STRUCT_OFFSET (GtkContainerClass, add),
483 _gtk_marshal_VOID__OBJECT,
486 container_signals[REMOVE] =
487 g_signal_new (I_("remove"),
488 G_OBJECT_CLASS_TYPE (gobject_class),
490 G_STRUCT_OFFSET (GtkContainerClass, remove),
492 _gtk_marshal_VOID__OBJECT,
495 container_signals[CHECK_RESIZE] =
496 g_signal_new (I_("check-resize"),
497 G_OBJECT_CLASS_TYPE (gobject_class),
499 G_STRUCT_OFFSET (GtkContainerClass, check_resize),
501 _gtk_marshal_VOID__VOID,
503 container_signals[SET_FOCUS_CHILD] =
504 g_signal_new (I_("set-focus-child"),
505 G_OBJECT_CLASS_TYPE (gobject_class),
507 G_STRUCT_OFFSET (GtkContainerClass, set_focus_child),
509 _gtk_marshal_VOID__OBJECT,
513 g_type_class_add_private (class, sizeof (GtkContainerPrivate));
517 gtk_container_buildable_init (GtkBuildableIface *iface)
519 parent_buildable_iface = g_type_interface_peek_parent (iface);
520 iface->add_child = gtk_container_buildable_add_child;
521 iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
522 iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
526 gtk_container_buildable_add_child (GtkBuildable *buildable,
533 GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
535 else if (GTK_IS_WIDGET (child) &&
536 gtk_widget_get_parent (GTK_WIDGET (child)) == NULL)
538 gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
541 g_warning ("Cannot add an object of type %s to a container of type %s",
542 g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
546 gtk_container_buildable_set_child_property (GtkContainer *container,
553 GValue gvalue = { 0, };
554 GError *error = NULL;
556 pspec = gtk_container_class_find_child_property
557 (G_OBJECT_GET_CLASS (container), name);
560 g_warning ("%s does not have a property called %s",
561 g_type_name (G_OBJECT_TYPE (container)), name);
565 if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
567 g_warning ("Could not read property %s:%s with value %s of type %s: %s",
568 g_type_name (G_OBJECT_TYPE (container)),
571 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
573 g_error_free (error);
577 gtk_container_child_set_property (container, child, name, &gvalue);
578 g_value_unset (&gvalue);
583 GtkContainer *container;
586 gchar *child_prop_name;
588 gboolean translatable;
589 } PackingPropertiesData;
592 attributes_start_element (GMarkupParseContext *context,
593 const gchar *element_name,
595 const gchar **values,
599 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
602 if (strcmp (element_name, "property") == 0)
604 for (i = 0; names[i]; i++)
605 if (strcmp (names[i], "name") == 0)
606 parser_data->child_prop_name = g_strdup (values[i]);
607 else if (strcmp (names[i], "translatable") == 0)
609 if (!_gtk_builder_boolean_from_string (values[1],
610 &parser_data->translatable,
614 else if (strcmp (names[i], "comments") == 0)
615 ; /* for translators */
616 else if (strcmp (names[i], "context") == 0)
617 parser_data->context = g_strdup (values[1]);
619 g_warning ("Unsupported attribute for GtkContainer Child "
620 "property: %s\n", names[i]);
622 else if (strcmp (element_name, "packing") == 0)
625 g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
629 attributes_text_element (GMarkupParseContext *context,
635 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
637 if (parser_data->child_prop_name)
638 g_string_append_len (parser_data->string, text, text_len);
642 attributes_end_element (GMarkupParseContext *context,
643 const gchar *element_name,
647 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
649 /* translate the string */
650 if (parser_data->string->len && parser_data->translatable)
655 domain = gtk_builder_get_translation_domain (parser_data->builder);
657 translated = _gtk_builder_parser_translate (domain,
658 parser_data->context,
659 parser_data->string->str);
660 g_string_set_size (parser_data->string, 0);
661 g_string_append (parser_data->string, translated);
664 if (parser_data->child_prop_name)
665 gtk_container_buildable_set_child_property (parser_data->container,
666 parser_data->builder,
668 parser_data->child_prop_name,
669 parser_data->string->str);
671 g_string_set_size (parser_data->string, 0);
672 g_free (parser_data->child_prop_name);
673 g_free (parser_data->context);
674 parser_data->child_prop_name = NULL;
675 parser_data->context = NULL;
676 parser_data->translatable = FALSE;
679 static const GMarkupParser attributes_parser =
681 attributes_start_element,
682 attributes_end_element,
683 attributes_text_element,
687 gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
690 const gchar *tagname,
691 GMarkupParser *parser,
694 PackingPropertiesData *parser_data;
696 if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
697 tagname, parser, data))
700 if (child && strcmp (tagname, "packing") == 0)
702 parser_data = g_slice_new0 (PackingPropertiesData);
703 parser_data->string = g_string_new ("");
704 parser_data->builder = builder;
705 parser_data->container = GTK_CONTAINER (buildable);
706 parser_data->child = GTK_WIDGET (child);
707 parser_data->child_prop_name = NULL;
709 *parser = attributes_parser;
718 gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
721 const gchar *tagname,
724 if (strcmp (tagname, "packing") == 0)
726 PackingPropertiesData *parser_data = (PackingPropertiesData*)data;
727 g_string_free (parser_data->string, TRUE);
728 g_slice_free (PackingPropertiesData, parser_data);
732 if (parent_buildable_iface->custom_tag_end)
733 parent_buildable_iface->custom_tag_end (buildable, builder,
734 child, tagname, data);
738 * gtk_container_child_type:
739 * @container: a #GtkContainer
741 * Returns the type of the children supported by the container.
743 * Note that this may return %G_TYPE_NONE to indicate that no more
744 * children can be added, e.g. for a #GtkPaned which already has two
747 * Return value: a #GType.
750 gtk_container_child_type (GtkContainer *container)
753 GtkContainerClass *class;
755 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
757 class = GTK_CONTAINER_GET_CLASS (container);
758 if (class->child_type)
759 slot = class->child_type (container);
766 /* --- GtkContainer child property mechanism --- */
768 container_get_child_property (GtkContainer *container,
773 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
775 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
779 container_set_child_property (GtkContainer *container,
783 GObjectNotifyQueue *nqueue)
785 GValue tmp_value = { 0, };
786 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
788 /* provide a copy to work from, convert (if necessary) and validate */
789 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
790 if (!g_value_transform (value, &tmp_value))
791 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
793 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
794 G_VALUE_TYPE_NAME (value));
795 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
797 gchar *contents = g_strdup_value_contents (value);
799 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
801 G_VALUE_TYPE_NAME (value),
803 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
808 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
809 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
811 g_value_unset (&tmp_value);
815 * gtk_container_child_get_valist:
816 * @container: a #GtkContainer
817 * @child: a widget which is a child of @container
818 * @first_property_name: the name of the first property to get
819 * @var_args: return location for the first property, followed
820 * optionally by more name/return location pairs, followed by %NULL
822 * Gets the values of one or more child properties for @child and @container.
825 gtk_container_child_get_valist (GtkContainer *container,
827 const gchar *first_property_name,
832 g_return_if_fail (GTK_IS_CONTAINER (container));
833 g_return_if_fail (GTK_IS_WIDGET (child));
834 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
836 g_object_ref (container);
837 g_object_ref (child);
839 name = first_property_name;
842 GValue value = { 0, };
846 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
848 G_OBJECT_TYPE (container),
852 g_warning ("%s: container class `%s' has no child property named `%s'",
854 G_OBJECT_TYPE_NAME (container),
858 if (!(pspec->flags & G_PARAM_READABLE))
860 g_warning ("%s: child property `%s' of container class `%s' is not readable",
863 G_OBJECT_TYPE_NAME (container));
866 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
867 container_get_child_property (container, child, pspec, &value);
868 G_VALUE_LCOPY (&value, var_args, 0, &error);
871 g_warning ("%s: %s", G_STRLOC, error);
873 g_value_unset (&value);
876 g_value_unset (&value);
877 name = va_arg (var_args, gchar*);
880 g_object_unref (child);
881 g_object_unref (container);
885 * gtk_container_child_get_property:
886 * @container: a #GtkContainer
887 * @child: a widget which is a child of @container
888 * @property_name: the name of the property to get
889 * @value: a location to return the value
891 * Gets the value of a child property for @child and @container.
894 gtk_container_child_get_property (GtkContainer *container,
896 const gchar *property_name,
901 g_return_if_fail (GTK_IS_CONTAINER (container));
902 g_return_if_fail (GTK_IS_WIDGET (child));
903 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
904 g_return_if_fail (property_name != NULL);
905 g_return_if_fail (G_IS_VALUE (value));
907 g_object_ref (container);
908 g_object_ref (child);
909 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
910 G_OBJECT_TYPE (container), TRUE);
912 g_warning ("%s: container class `%s' has no child property named `%s'",
914 G_OBJECT_TYPE_NAME (container),
916 else if (!(pspec->flags & G_PARAM_READABLE))
917 g_warning ("%s: child property `%s' of container class `%s' is not readable",
920 G_OBJECT_TYPE_NAME (container));
923 GValue *prop_value, tmp_value = { 0, };
925 /* auto-conversion of the callers value type
927 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
929 g_value_reset (value);
932 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
934 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
936 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
937 G_VALUE_TYPE_NAME (value));
938 g_object_unref (child);
939 g_object_unref (container);
944 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
945 prop_value = &tmp_value;
947 container_get_child_property (container, child, pspec, prop_value);
948 if (prop_value != value)
950 g_value_transform (prop_value, value);
951 g_value_unset (&tmp_value);
954 g_object_unref (child);
955 g_object_unref (container);
959 * gtk_container_child_set_valist:
960 * @container: a #GtkContainer
961 * @child: a widget which is a child of @container
962 * @first_property_name: the name of the first property to set
963 * @var_args: a %NULL-terminated list of property names and values, starting
964 * with @first_prop_name
966 * Sets one or more child properties for @child and @container.
969 gtk_container_child_set_valist (GtkContainer *container,
971 const gchar *first_property_name,
974 GObjectNotifyQueue *nqueue;
977 g_return_if_fail (GTK_IS_CONTAINER (container));
978 g_return_if_fail (GTK_IS_WIDGET (child));
979 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
981 g_object_ref (container);
982 g_object_ref (child);
984 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
985 name = first_property_name;
988 GValue value = { 0, };
990 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
992 G_OBJECT_TYPE (container),
996 g_warning ("%s: container class `%s' has no child property named `%s'",
998 G_OBJECT_TYPE_NAME (container),
1002 if (!(pspec->flags & G_PARAM_WRITABLE))
1004 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1007 G_OBJECT_TYPE_NAME (container));
1011 G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
1012 var_args, 0, &error);
1015 g_warning ("%s: %s", G_STRLOC, error);
1018 /* we purposely leak the value here, it might not be
1019 * in a sane state if an error condition occoured
1023 container_set_child_property (container, child, pspec, &value, nqueue);
1024 g_value_unset (&value);
1025 name = va_arg (var_args, gchar*);
1027 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1029 g_object_unref (container);
1030 g_object_unref (child);
1034 * gtk_container_child_set_property:
1035 * @container: a #GtkContainer
1036 * @child: a widget which is a child of @container
1037 * @property_name: the name of the property to set
1038 * @value: the value to set the property to
1040 * Sets a child property for @child and @container.
1043 gtk_container_child_set_property (GtkContainer *container,
1045 const gchar *property_name,
1046 const GValue *value)
1048 GObjectNotifyQueue *nqueue;
1051 g_return_if_fail (GTK_IS_CONTAINER (container));
1052 g_return_if_fail (GTK_IS_WIDGET (child));
1053 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1054 g_return_if_fail (property_name != NULL);
1055 g_return_if_fail (G_IS_VALUE (value));
1057 g_object_ref (container);
1058 g_object_ref (child);
1060 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1061 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1062 G_OBJECT_TYPE (container), TRUE);
1064 g_warning ("%s: container class `%s' has no child property named `%s'",
1066 G_OBJECT_TYPE_NAME (container),
1068 else if (!(pspec->flags & G_PARAM_WRITABLE))
1069 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1072 G_OBJECT_TYPE_NAME (container));
1075 container_set_child_property (container, child, pspec, value, nqueue);
1077 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1078 g_object_unref (container);
1079 g_object_unref (child);
1083 * gtk_container_add_with_properties:
1084 * @container: a #GtkContainer
1085 * @widget: a widget to be placed inside @container
1086 * @first_prop_name: the name of the first child property to set
1087 * @Varargs: a %NULL-terminated list of property names and values, starting
1088 * with @first_prop_name
1090 * Adds @widget to @container, setting child properties at the same time.
1091 * See gtk_container_add() and gtk_container_child_set() for more details.
1094 gtk_container_add_with_properties (GtkContainer *container,
1096 const gchar *first_prop_name,
1099 g_return_if_fail (GTK_IS_CONTAINER (container));
1100 g_return_if_fail (GTK_IS_WIDGET (widget));
1101 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1103 g_object_ref (container);
1104 g_object_ref (widget);
1105 gtk_widget_freeze_child_notify (widget);
1107 g_signal_emit (container, container_signals[ADD], 0, widget);
1108 if (gtk_widget_get_parent (widget))
1112 va_start (var_args, first_prop_name);
1113 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1117 gtk_widget_thaw_child_notify (widget);
1118 g_object_unref (widget);
1119 g_object_unref (container);
1123 * gtk_container_child_set:
1124 * @container: a #GtkContainer
1125 * @child: a widget which is a child of @container
1126 * @first_prop_name: the name of the first property to set
1127 * @Varargs: a %NULL-terminated list of property names and values, starting
1128 * with @first_prop_name
1130 * Sets one or more child properties for @child and @container.
1133 gtk_container_child_set (GtkContainer *container,
1135 const gchar *first_prop_name,
1140 g_return_if_fail (GTK_IS_CONTAINER (container));
1141 g_return_if_fail (GTK_IS_WIDGET (child));
1142 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1144 va_start (var_args, first_prop_name);
1145 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1150 * gtk_container_child_get:
1151 * @container: a #GtkContainer
1152 * @child: a widget which is a child of @container
1153 * @first_prop_name: the name of the first property to get
1154 * @Varargs: return location for the first property, followed
1155 * optionally by more name/return location pairs, followed by %NULL
1157 * Gets the values of one or more child properties for @child and @container.
1160 gtk_container_child_get (GtkContainer *container,
1162 const gchar *first_prop_name,
1167 g_return_if_fail (GTK_IS_CONTAINER (container));
1168 g_return_if_fail (GTK_IS_WIDGET (child));
1169 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1171 va_start (var_args, first_prop_name);
1172 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1177 * gtk_container_class_install_child_property:
1178 * @cclass: a #GtkContainerClass
1179 * @property_id: the id for the property
1180 * @pspec: the #GParamSpec for the property
1182 * Installs a child property on a container class.
1185 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1189 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1190 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1191 if (pspec->flags & G_PARAM_WRITABLE)
1192 g_return_if_fail (cclass->set_child_property != NULL);
1193 if (pspec->flags & G_PARAM_READABLE)
1194 g_return_if_fail (cclass->get_child_property != NULL);
1195 g_return_if_fail (property_id > 0);
1196 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1197 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1198 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1200 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1202 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1203 G_OBJECT_CLASS_NAME (cclass),
1207 g_param_spec_ref (pspec);
1208 g_param_spec_sink (pspec);
1209 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1210 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1214 * gtk_container_class_find_child_property:
1215 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1216 * @property_name: the name of the child property to find
1217 * @returns: (transfer none): the #GParamSpec of the child property or
1218 * %NULL if @class has no child property with that name.
1220 * Finds a child property of a container class by name.
1223 gtk_container_class_find_child_property (GObjectClass *cclass,
1224 const gchar *property_name)
1226 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1227 g_return_val_if_fail (property_name != NULL, NULL);
1229 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1231 G_OBJECT_CLASS_TYPE (cclass),
1236 * gtk_container_class_list_child_properties:
1237 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1238 * @n_properties: location to return the number of child properties found
1239 * @returns: (array length=n_properties) (transfer container): a newly
1240 * allocated %NULL-terminated array of #GParamSpec*. The
1241 * array must be freed with g_free().
1243 * Returns all child properties of a container class.
1246 gtk_container_class_list_child_properties (GObjectClass *cclass,
1247 guint *n_properties)
1249 GParamSpec **pspecs;
1252 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1254 pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
1255 G_OBJECT_CLASS_TYPE (cclass),
1264 gtk_container_add_unimplemented (GtkContainer *container,
1267 g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1271 gtk_container_remove_unimplemented (GtkContainer *container,
1274 g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1278 gtk_container_init (GtkContainer *container)
1280 GtkContainerPrivate *priv;
1282 container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
1284 GtkContainerPrivate);
1285 priv = container->priv;
1287 priv->focus_child = NULL;
1288 priv->border_width = 0;
1289 priv->need_resize = FALSE;
1290 priv->resize_mode = GTK_RESIZE_PARENT;
1291 priv->reallocate_redraws = FALSE;
1295 gtk_container_destroy (GtkWidget *widget)
1297 GtkContainer *container = GTK_CONTAINER (widget);
1298 GtkContainerPrivate *priv = container->priv;
1300 if (_gtk_widget_get_resize_pending (GTK_WIDGET (container)))
1301 _gtk_container_dequeue_resize_handler (container);
1303 if (priv->focus_child)
1305 g_object_unref (priv->focus_child);
1306 priv->focus_child = NULL;
1309 /* do this before walking child widgets, to avoid
1310 * removing children from focus chain one by one.
1312 if (priv->has_focus_chain)
1313 gtk_container_unset_focus_chain (container);
1315 gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
1317 GTK_WIDGET_CLASS (parent_class)->destroy (widget);
1321 gtk_container_set_property (GObject *object,
1323 const GValue *value,
1326 GtkContainer *container = GTK_CONTAINER (object);
1330 case PROP_BORDER_WIDTH:
1331 gtk_container_set_border_width (container, g_value_get_uint (value));
1333 case PROP_RESIZE_MODE:
1334 gtk_container_set_resize_mode (container, g_value_get_enum (value));
1337 gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
1340 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1346 gtk_container_get_property (GObject *object,
1351 GtkContainer *container = GTK_CONTAINER (object);
1352 GtkContainerPrivate *priv = container->priv;
1356 case PROP_BORDER_WIDTH:
1357 g_value_set_uint (value, priv->border_width);
1359 case PROP_RESIZE_MODE:
1360 g_value_set_enum (value, priv->resize_mode);
1363 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1369 * gtk_container_set_border_width:
1370 * @container: a #GtkContainer
1371 * @border_width: amount of blank space to leave <emphasis>outside</emphasis>
1372 * the container. Valid values are in the range 0-65535 pixels.
1374 * Sets the border width of the container.
1376 * The border width of a container is the amount of space to leave
1377 * around the outside of the container. The only exception to this is
1378 * #GtkWindow; because toplevel windows can't leave space outside,
1379 * they leave the space inside. The border is added on all sides of
1380 * the container. To add space to only one side, one approach is to
1381 * create a #GtkAlignment widget, call gtk_widget_set_size_request()
1382 * to give it a size, and place it on the side of the container as
1386 gtk_container_set_border_width (GtkContainer *container,
1389 GtkContainerPrivate *priv;
1391 g_return_if_fail (GTK_IS_CONTAINER (container));
1393 priv = container->priv;
1395 if (priv->border_width != border_width)
1397 priv->border_width = border_width;
1398 g_object_notify (G_OBJECT (container), "border-width");
1400 if (gtk_widget_get_realized (GTK_WIDGET (container)))
1401 gtk_widget_queue_resize (GTK_WIDGET (container));
1406 * gtk_container_get_border_width:
1407 * @container: a #GtkContainer
1409 * Retrieves the border width of the container. See
1410 * gtk_container_set_border_width().
1412 * Return value: the current border width
1415 gtk_container_get_border_width (GtkContainer *container)
1417 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
1419 return container->priv->border_width;
1423 * gtk_container_add:
1424 * @container: a #GtkContainer
1425 * @widget: a widget to be placed inside @container
1427 * Adds @widget to @container. Typically used for simple containers
1428 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
1429 * layout containers such as #GtkBox or #GtkTable, this function will
1430 * pick default packing parameters that may not be correct. So
1431 * consider functions such as gtk_box_pack_start() and
1432 * gtk_table_attach() as an alternative to gtk_container_add() in
1433 * those cases. A widget may be added to only one container at a time;
1434 * you can't place the same widget inside two different containers.
1437 gtk_container_add (GtkContainer *container,
1442 g_return_if_fail (GTK_IS_CONTAINER (container));
1443 g_return_if_fail (GTK_IS_WIDGET (widget));
1445 parent = gtk_widget_get_parent (widget);
1449 g_warning ("Attempting to add a widget with type %s to a container of "
1450 "type %s, but the widget is already inside a container of type %s, "
1451 "please use gtk_widget_reparent()" ,
1452 g_type_name (G_OBJECT_TYPE (widget)),
1453 g_type_name (G_OBJECT_TYPE (container)),
1454 g_type_name (G_OBJECT_TYPE (parent)));
1458 g_signal_emit (container, container_signals[ADD], 0, widget);
1462 * gtk_container_remove:
1463 * @container: a #GtkContainer
1464 * @widget: a current child of @container
1466 * Removes @widget from @container. @widget must be inside @container.
1467 * Note that @container will own a reference to @widget, and that this
1468 * may be the last reference held; so removing a widget from its
1469 * container can destroy that widget. If you want to use @widget
1470 * again, you need to add a reference to it while it's not inside
1471 * a container, using g_object_ref(). If you don't want to use @widget
1472 * again it's usually more efficient to simply destroy it directly
1473 * using gtk_widget_destroy() since this will remove it from the
1474 * container and help break any circular reference count cycles.
1477 gtk_container_remove (GtkContainer *container,
1480 g_return_if_fail (GTK_IS_CONTAINER (container));
1481 g_return_if_fail (GTK_IS_WIDGET (widget));
1482 g_return_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (container));
1484 g_signal_emit (container, container_signals[REMOVE], 0, widget);
1488 _gtk_container_dequeue_resize_handler (GtkContainer *container)
1490 g_return_if_fail (GTK_IS_CONTAINER (container));
1491 g_return_if_fail (_gtk_widget_get_resize_pending (GTK_WIDGET (container)));
1493 container_resize_queue = g_slist_remove (container_resize_queue, container);
1494 _gtk_widget_set_resize_pending (GTK_WIDGET (container), FALSE);
1498 * gtk_container_set_resize_mode:
1499 * @container: a #GtkContainer
1500 * @resize_mode: the new resize mode
1502 * Sets the resize mode for the container.
1504 * The resize mode of a container determines whether a resize request
1505 * will be passed to the container's parent, queued for later execution
1506 * or executed immediately.
1509 gtk_container_set_resize_mode (GtkContainer *container,
1510 GtkResizeMode resize_mode)
1512 GtkContainerPrivate *priv;
1514 g_return_if_fail (GTK_IS_CONTAINER (container));
1515 g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
1517 priv = container->priv;
1519 if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
1520 resize_mode == GTK_RESIZE_PARENT)
1522 resize_mode = GTK_RESIZE_QUEUE;
1525 if (priv->resize_mode != resize_mode)
1527 priv->resize_mode = resize_mode;
1529 gtk_widget_queue_resize (GTK_WIDGET (container));
1530 g_object_notify (G_OBJECT (container), "resize-mode");
1535 * gtk_container_get_resize_mode:
1536 * @container: a #GtkContainer
1538 * Returns the resize mode for the container. See
1539 * gtk_container_set_resize_mode ().
1541 * Return value: the current resize mode
1544 gtk_container_get_resize_mode (GtkContainer *container)
1546 g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
1548 return container->priv->resize_mode;
1552 * gtk_container_set_reallocate_redraws:
1553 * @container: a #GtkContainer
1554 * @needs_redraws: the new value for the container's @reallocate_redraws flag
1556 * Sets the @reallocate_redraws flag of the container to the given value.
1558 * Containers requesting reallocation redraws get automatically
1559 * redrawn if any of their children changed allocation.
1562 gtk_container_set_reallocate_redraws (GtkContainer *container,
1563 gboolean needs_redraws)
1565 g_return_if_fail (GTK_IS_CONTAINER (container));
1567 container->priv->reallocate_redraws = needs_redraws ? TRUE : FALSE;
1570 static GtkContainer*
1571 gtk_container_get_resize_container (GtkContainer *container)
1574 GtkWidget *widget = GTK_WIDGET (container);
1576 while ((parent = gtk_widget_get_parent (widget)))
1579 if (GTK_IS_RESIZE_CONTAINER (widget))
1583 return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;
1587 gtk_container_idle_sizer (gpointer data)
1589 /* we may be invoked with a container_resize_queue of NULL, because
1590 * queue_resize could have been adding an extra idle function while
1591 * the queue still got processed. we better just ignore such case
1592 * than trying to explicitely work around them with some extra flags,
1593 * since it doesn't cause any actual harm.
1595 while (container_resize_queue)
1600 slist = container_resize_queue;
1601 container_resize_queue = slist->next;
1602 widget = slist->data;
1603 g_slist_free_1 (slist);
1605 _gtk_widget_set_resize_pending (widget, FALSE);
1606 gtk_container_check_resize (GTK_CONTAINER (widget));
1609 gdk_window_process_all_updates ();
1615 _gtk_container_queue_resize_internal (GtkContainer *container,
1616 gboolean invalidate_only)
1618 GtkContainer *resize_container;
1622 g_return_if_fail (GTK_IS_CONTAINER (container));
1624 widget = GTK_WIDGET (container);
1626 resize_container = gtk_container_get_resize_container (container);
1630 _gtk_widget_set_alloc_needed (widget, TRUE);
1631 _gtk_widget_set_width_request_needed (widget, TRUE);
1632 _gtk_widget_set_height_request_needed (widget, TRUE);
1634 if ((resize_container && widget == GTK_WIDGET (resize_container)) ||
1635 !(parent = gtk_widget_get_parent (widget)))
1641 if (resize_container && !invalidate_only)
1643 if (gtk_widget_get_visible (GTK_WIDGET (resize_container)) &&
1644 (gtk_widget_is_toplevel (GTK_WIDGET (resize_container)) ||
1645 gtk_widget_get_realized (GTK_WIDGET (resize_container))))
1647 switch (resize_container->priv->resize_mode)
1649 case GTK_RESIZE_QUEUE:
1650 if (!_gtk_widget_get_resize_pending (GTK_WIDGET (resize_container)))
1652 _gtk_widget_set_resize_pending (GTK_WIDGET (resize_container), TRUE);
1653 if (container_resize_queue == NULL)
1654 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1655 gtk_container_idle_sizer,
1657 container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
1661 case GTK_RESIZE_IMMEDIATE:
1662 gtk_container_check_resize (resize_container);
1665 case GTK_RESIZE_PARENT:
1666 g_assert_not_reached ();
1672 /* we need to let hidden resize containers know that something
1673 * changed while they where hidden (currently only evaluated by
1676 resize_container->priv->need_resize = TRUE;
1682 * _gtk_container_queue_resize:
1683 * @container: a #GtkContainer
1685 * Determines the "resize container" in the hierarchy above this container
1686 * (typically the toplevel, but other containers can be set as resize
1687 * containers with gtk_container_set_resize_mode()), marks the container
1688 * and all parents up to and including the resize container as needing
1689 * to have sizes recompted, and if necessary adds the resize container
1690 * to the queue of containers that will be resized out at idle.
1693 _gtk_container_queue_resize (GtkContainer *container)
1695 _gtk_container_queue_resize_internal (container, FALSE);
1699 * _gtk_container_resize_invalidate:
1700 * @container: a #GtkContainer
1702 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1703 * actually queue the resize container for resize.
1706 _gtk_container_resize_invalidate (GtkContainer *container)
1708 _gtk_container_queue_resize_internal (container, TRUE);
1712 gtk_container_check_resize (GtkContainer *container)
1714 g_return_if_fail (GTK_IS_CONTAINER (container));
1716 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1720 gtk_container_real_check_resize (GtkContainer *container)
1722 GtkWidget *widget = GTK_WIDGET (container);
1723 GtkAllocation allocation;
1724 GtkRequisition requisition;
1726 gtk_widget_get_preferred_size (widget,
1727 &requisition, NULL);
1728 gtk_widget_get_allocation (widget, &allocation);
1730 if (requisition.width > allocation.width ||
1731 requisition.height > allocation.height)
1733 if (GTK_IS_RESIZE_CONTAINER (container))
1735 gtk_widget_size_allocate (widget, &allocation);
1736 gtk_widget_set_allocation (widget, &allocation);
1739 gtk_widget_queue_resize (widget);
1743 gtk_container_resize_children (container);
1747 /* The container hasn't changed size but one of its children
1748 * queued a resize request. Which means that the allocation
1749 * is not sufficient for the requisition of some child.
1750 * We've already performed a size request at this point,
1751 * so we simply need to reallocate and let the allocation
1752 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1755 gtk_container_resize_children (GtkContainer *container)
1757 GtkAllocation allocation;
1760 /* resizing invariants:
1761 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1762 * containers that have an idle sizer pending must be flagged with
1765 g_return_if_fail (GTK_IS_CONTAINER (container));
1767 widget = GTK_WIDGET (container);
1768 gtk_widget_get_allocation (widget, &allocation);
1770 gtk_widget_size_allocate (widget, &allocation);
1771 gtk_widget_set_allocation (widget, &allocation);
1775 gtk_container_adjust_size_request (GtkWidget *widget,
1776 GtkOrientation orientation,
1780 GtkContainer *container;
1782 container = GTK_CONTAINER (widget);
1784 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1788 border_width = container->priv->border_width;
1790 *minimum_size += border_width * 2;
1791 *natural_size += border_width * 2;
1794 /* chain up last so gtk_widget_set_size_request() values
1795 * will have a chance to overwrite our border width.
1797 parent_class->adjust_size_request (widget, orientation,
1798 minimum_size, natural_size);
1802 gtk_container_adjust_size_allocation (GtkWidget *widget,
1803 GtkOrientation orientation,
1806 gint *allocated_pos,
1807 gint *allocated_size)
1809 GtkContainer *container;
1812 container = GTK_CONTAINER (widget);
1814 if (!GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1816 parent_class->adjust_size_allocation (widget, orientation,
1817 minimum_size, natural_size, allocated_pos,
1822 border_width = container->priv->border_width;
1824 *allocated_size -= border_width * 2;
1826 /* If we get a pathological too-small allocation to hold
1827 * even the border width, leave all allocation to the actual
1828 * widget, and leave x,y unchanged. (GtkWidget's min size is
1829 * 1x1 if you're wondering why <1 and not <0)
1831 * As long as we have space, set x,y properly.
1834 if (*allocated_size < 1)
1836 *allocated_size += border_width * 2;
1840 *allocated_pos += border_width;
1841 *minimum_size -= border_width * 2;
1842 *natural_size -= border_width * 2;
1845 /* Chain up to GtkWidgetClass *after* removing our border width from
1846 * the proposed allocation size. This is because it's possible that the
1847 * widget was allocated more space than it needs in a said orientation,
1848 * if GtkWidgetClass does any alignments and thus limits the size to the
1849 * natural size... then we need that to be done *after* removing any margins
1850 * and padding values.
1852 parent_class->adjust_size_allocation (widget, orientation,
1853 minimum_size, natural_size, allocated_pos,
1863 count_request_modes (GtkWidget *widget,
1864 RequestModeCount *count)
1866 GtkSizeRequestMode mode = gtk_widget_get_request_mode (widget);
1870 case GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH:
1873 case GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT:
1876 case GTK_SIZE_REQUEST_CONSTANT_SIZE:
1882 static GtkSizeRequestMode
1883 gtk_container_get_request_mode (GtkWidget *widget)
1885 GtkContainer *container = GTK_CONTAINER (widget);
1886 GtkContainerPrivate *priv = container->priv;
1888 /* Recalculate the request mode of the children by majority
1889 * vote whenever the internal content changes */
1890 if (_gtk_widget_get_width_request_needed (widget) ||
1891 _gtk_widget_get_height_request_needed (widget))
1893 RequestModeCount count = { 0, 0 };
1895 gtk_container_forall (container, (GtkCallback)count_request_modes, &count);
1897 if (!count.hfw && !count.wfh)
1898 priv->request_mode = GTK_SIZE_REQUEST_CONSTANT_SIZE;
1900 priv->request_mode = count.wfh > count.hfw ?
1901 GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT :
1902 GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1905 return priv->request_mode;
1909 * gtk_container_class_handle_border_width:
1910 * @klass: the class struct of a #GtkContainer subclass
1912 * Modifies a subclass of #GtkContainerClass to automatically add and
1913 * remove the border-width setting on GtkContainer. This allows the
1914 * subclass to ignore the border width in its size request and
1915 * allocate methods. The intent is for a subclass to invoke this
1916 * in its class_init function.
1918 * gtk_container_class_handle_border_width() is necessary because it
1919 * would break API too badly to make this behavior the default. So
1920 * subclasses must "opt in" to the parent class handling border_width
1924 gtk_container_class_handle_border_width (GtkContainerClass *klass)
1926 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
1928 klass->_handle_border_width = TRUE;
1932 * gtk_container_forall:
1933 * @container: a #GtkContainer
1934 * @callback: (scope call) (closure callback_data): a callback
1935 * @callback_data: callback user data
1937 * Invokes @callback on each child of @container, including children
1938 * that are considered "internal" (implementation details of the
1939 * container). "Internal" children generally weren't added by the user
1940 * of the container, but were added by the container implementation
1941 * itself. Most applications should use gtk_container_foreach(),
1942 * rather than gtk_container_forall().
1947 gtk_container_forall (GtkContainer *container,
1948 GtkCallback callback,
1949 gpointer callback_data)
1951 GtkContainerClass *class;
1953 g_return_if_fail (GTK_IS_CONTAINER (container));
1954 g_return_if_fail (callback != NULL);
1956 class = GTK_CONTAINER_GET_CLASS (container);
1959 class->forall (container, TRUE, callback, callback_data);
1963 * gtk_container_foreach:
1964 * @container: a #GtkContainer
1965 * @callback: (scope call): a callback
1966 * @callback_data: callback user data
1968 * Invokes @callback on each non-internal child of @container. See
1969 * gtk_container_forall() for details on what constitutes an
1970 * "internal" child. Most applications should use
1971 * gtk_container_foreach(), rather than gtk_container_forall().
1974 gtk_container_foreach (GtkContainer *container,
1975 GtkCallback callback,
1976 gpointer callback_data)
1978 GtkContainerClass *class;
1980 g_return_if_fail (GTK_IS_CONTAINER (container));
1981 g_return_if_fail (callback != NULL);
1983 class = GTK_CONTAINER_GET_CLASS (container);
1986 class->forall (container, FALSE, callback, callback_data);
1990 * gtk_container_set_focus_child:
1991 * @container: a #GtkContainer
1992 * @child: (allow-none): a #GtkWidget, or %NULL
1994 * Sets, or unsets if @child is %NULL, the focused child of @container.
1996 * This function emits the GtkContainer::set_focus_child signal of
1997 * @container. Implementations of #GtkContainer can override the
1998 * default behaviour by overriding the class closure of this signal.
2000 * This is function is mostly meant to be used by widgets. Applications can use
2001 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
2004 gtk_container_set_focus_child (GtkContainer *container,
2007 g_return_if_fail (GTK_IS_CONTAINER (container));
2009 g_return_if_fail (GTK_IS_WIDGET (child));
2011 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
2015 * gtk_container_get_focus_child:
2016 * @container: a #GtkContainer
2018 * Returns the current focus child widget inside @container. This is not the
2019 * currently focused widget. That can be obtained by calling
2020 * gtk_window_get_focus().
2022 * Returns: (transfer none): The child widget which will receive the
2023 * focus inside @container when the @conatiner is focussed,
2024 * or %NULL if none is set.
2029 gtk_container_get_focus_child (GtkContainer *container)
2031 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2033 return container->priv->focus_child;
2037 * gtk_container_get_children:
2038 * @container: a #GtkContainer
2040 * Returns the container's non-internal children. See
2041 * gtk_container_forall() for details on what constitutes an "internal" child.
2043 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
2046 gtk_container_get_children (GtkContainer *container)
2048 GList *children = NULL;
2050 gtk_container_foreach (container,
2051 gtk_container_children_callback,
2054 return g_list_reverse (children);
2058 gtk_container_child_position_callback (GtkWidget *widget,
2059 gpointer client_data)
2065 } *data = client_data;
2068 if (data->child == widget)
2069 data->index = data->i;
2073 gtk_container_child_default_composite_name (GtkContainer *container,
2083 /* fallback implementation */
2087 gtk_container_forall (container,
2088 gtk_container_child_position_callback,
2091 name = g_strdup_printf ("%s-%u",
2092 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2099 _gtk_container_child_composite_name (GtkContainer *container,
2102 gboolean composite_child;
2104 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2105 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2106 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2108 g_object_get (child, "composite-child", &composite_child, NULL);
2109 if (composite_child)
2111 static GQuark quark_composite_name = 0;
2114 if (!quark_composite_name)
2115 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2117 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2120 GtkContainerClass *class;
2122 class = GTK_CONTAINER_GET_CLASS (container);
2123 if (class->composite_name)
2124 name = class->composite_name (container, child);
2127 name = g_strdup (name);
2138 } ComputeExpandData;
2141 gtk_container_compute_expand_callback (GtkWidget *widget,
2142 gpointer client_data)
2144 ComputeExpandData *data = client_data;
2146 /* note that we don't get_expand on the child if we already know we
2147 * have to expand, so we only recurse into children until we find
2148 * one that expands and then we basically don't do any more
2149 * work. This means that we can leave some children in a
2150 * need_compute_expand state, which is fine, as long as GtkWidget
2151 * doesn't rely on an invariant that "if a child has
2152 * need_compute_expand, its parents also do"
2154 * gtk_widget_compute_expand() always returns FALSE if the
2155 * child is !visible so that's taken care of.
2157 data->hexpand = data->hexpand ||
2158 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2160 data->vexpand = data->vexpand ||
2161 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2165 gtk_container_compute_expand (GtkWidget *widget,
2166 gboolean *hexpand_p,
2167 gboolean *vexpand_p)
2169 ComputeExpandData data;
2171 data.hexpand = FALSE;
2172 data.vexpand = FALSE;
2174 gtk_container_forall (GTK_CONTAINER (widget),
2175 gtk_container_compute_expand_callback,
2178 *hexpand_p = data.hexpand;
2179 *vexpand_p = data.vexpand;
2183 gtk_container_real_set_focus_child (GtkContainer *container,
2186 GtkContainerPrivate *priv;
2188 g_return_if_fail (GTK_IS_CONTAINER (container));
2189 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2191 priv = container->priv;
2193 if (child != priv->focus_child)
2195 if (priv->focus_child)
2196 g_object_unref (priv->focus_child);
2197 priv->focus_child = child;
2198 if (priv->focus_child)
2199 g_object_ref (priv->focus_child);
2203 /* check for h/v adjustments
2205 if (priv->focus_child)
2207 GtkAdjustment *hadj;
2208 GtkAdjustment *vadj;
2209 GtkAllocation allocation;
2210 GtkWidget *focus_child;
2213 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2214 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2218 focus_child = priv->focus_child;
2219 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2221 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2224 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2227 gtk_widget_get_allocation (priv->focus_child, &allocation);
2231 gtk_widget_get_allocation (focus_child, &allocation);
2234 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2237 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2243 get_focus_chain (GtkContainer *container)
2245 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2248 /* same as gtk_container_get_children, except it includes internals
2251 gtk_container_get_all_children (GtkContainer *container)
2253 GList *children = NULL;
2255 gtk_container_forall (container,
2256 gtk_container_children_callback,
2262 static GtkWidgetPath *
2263 gtk_container_real_get_path_for_child (GtkContainer *container,
2266 GtkStyleContext *context;
2267 GtkWidgetPath *path;
2270 context = gtk_widget_get_style_context (GTK_WIDGET (container));
2271 path = gtk_widget_path_copy (gtk_widget_get_path (GTK_WIDGET (container)));
2273 /* Copy any permanent classes to the path */
2274 classes = gtk_style_context_list_classes (context);
2281 classes = classes->next;
2283 gtk_widget_path_iter_add_class (path, -1, cur->data);
2284 g_list_free_1 (cur);
2291 gtk_container_focus (GtkWidget *widget,
2292 GtkDirectionType direction)
2295 GList *sorted_children;
2297 GtkContainer *container;
2298 GtkContainerPrivate *priv;
2300 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2302 container = GTK_CONTAINER (widget);
2303 priv = container->priv;
2307 if (gtk_widget_get_can_focus (widget))
2309 if (!gtk_widget_has_focus (widget))
2311 gtk_widget_grab_focus (widget);
2317 /* Get a list of the containers children, allowing focus
2318 * chain to override.
2320 if (priv->has_focus_chain)
2321 children = g_list_copy (get_focus_chain (container));
2323 children = gtk_container_get_all_children (container);
2325 if (priv->has_focus_chain &&
2326 (direction == GTK_DIR_TAB_FORWARD ||
2327 direction == GTK_DIR_TAB_BACKWARD))
2329 sorted_children = g_list_copy (children);
2331 if (direction == GTK_DIR_TAB_BACKWARD)
2332 sorted_children = g_list_reverse (sorted_children);
2335 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2337 return_val = gtk_container_focus_move (container, sorted_children, direction);
2339 g_list_free (sorted_children);
2340 g_list_free (children);
2347 tab_compare (gconstpointer a,
2351 GtkAllocation child1_allocation, child2_allocation;
2352 const GtkWidget *child1 = a;
2353 const GtkWidget *child2 = b;
2354 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2357 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2358 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2360 y1 = child1_allocation.y + child1_allocation.height / 2;
2361 y2 = child2_allocation.y + child2_allocation.height / 2;
2365 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2366 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2368 if (text_direction == GTK_TEXT_DIR_RTL)
2369 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2371 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2374 return (y1 < y2) ? -1 : 1;
2378 gtk_container_focus_sort_tab (GtkContainer *container,
2380 GtkDirectionType direction,
2381 GtkWidget *old_focus)
2383 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2384 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2386 /* if we are going backwards then reverse the order
2389 if (direction == GTK_DIR_TAB_BACKWARD)
2390 children = g_list_reverse (children);
2395 /* Get coordinates of @widget's allocation with respect to
2396 * allocation of @container.
2399 get_allocation_coords (GtkContainer *container,
2401 GdkRectangle *allocation)
2403 gtk_widget_get_allocation (widget, allocation);
2405 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2406 0, 0, &allocation->x, &allocation->y);
2409 /* Look for a child in @children that is intermediate between
2410 * the focus widget and container. This widget, if it exists,
2411 * acts as the starting widget for focus navigation.
2414 find_old_focus (GtkContainer *container,
2417 GList *tmp_list = children;
2420 GtkWidget *child = tmp_list->data;
2421 GtkWidget *widget = child;
2423 while (widget && widget != (GtkWidget *)container)
2427 parent = gtk_widget_get_parent (widget);
2429 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2438 tmp_list = tmp_list->next;
2445 old_focus_coords (GtkContainer *container,
2446 GdkRectangle *old_focus_rect)
2448 GtkWidget *widget = GTK_WIDGET (container);
2449 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2450 GtkWidget *old_focus;
2452 if (GTK_IS_WINDOW (toplevel))
2454 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2456 return get_allocation_coords (container, old_focus, old_focus_rect);
2462 typedef struct _CompareInfo CompareInfo;
2466 GtkContainer *container;
2473 up_down_compare (gconstpointer a,
2477 GdkRectangle allocation1;
2478 GdkRectangle allocation2;
2479 CompareInfo *compare = data;
2482 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2483 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2485 y1 = allocation1.y + allocation1.height / 2;
2486 y2 = allocation2.y + allocation2.height / 2;
2490 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2491 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2493 if (compare->reverse)
2494 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2496 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2499 return (y1 < y2) ? -1 : 1;
2503 gtk_container_focus_sort_up_down (GtkContainer *container,
2505 GtkDirectionType direction,
2506 GtkWidget *old_focus)
2508 CompareInfo compare;
2510 GdkRectangle old_allocation;
2512 compare.container = container;
2513 compare.reverse = (direction == GTK_DIR_UP);
2516 old_focus = find_old_focus (container, children);
2518 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2524 /* Delete widgets from list that don't match minimum criteria */
2526 compare_x1 = old_allocation.x;
2527 compare_x2 = old_allocation.x + old_allocation.width;
2529 if (direction == GTK_DIR_UP)
2530 compare_y = old_allocation.y;
2532 compare_y = old_allocation.y + old_allocation.height;
2534 tmp_list = children;
2537 GtkWidget *child = tmp_list->data;
2538 GList *next = tmp_list->next;
2539 gint child_x1, child_x2;
2540 GdkRectangle child_allocation;
2542 if (child != old_focus)
2544 if (get_allocation_coords (container, child, &child_allocation))
2546 child_x1 = child_allocation.x;
2547 child_x2 = child_allocation.x + child_allocation.width;
2549 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2550 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2551 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2553 children = g_list_delete_link (children, tmp_list);
2557 children = g_list_delete_link (children, tmp_list);
2563 compare.x = (compare_x1 + compare_x2) / 2;
2564 compare.y = old_allocation.y + old_allocation.height / 2;
2568 /* No old focus widget, need to figure out starting x,y some other way
2570 GtkAllocation allocation;
2571 GtkWidget *widget = GTK_WIDGET (container);
2572 GdkRectangle old_focus_rect;
2574 gtk_widget_get_allocation (widget, &allocation);
2576 if (old_focus_coords (container, &old_focus_rect))
2578 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2582 if (!gtk_widget_get_has_window (widget))
2583 compare.x = allocation.x + allocation.width / 2;
2585 compare.x = allocation.width / 2;
2588 if (!gtk_widget_get_has_window (widget))
2589 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2591 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2594 children = g_list_sort_with_data (children, up_down_compare, &compare);
2596 if (compare.reverse)
2597 children = g_list_reverse (children);
2603 left_right_compare (gconstpointer a,
2607 GdkRectangle allocation1;
2608 GdkRectangle allocation2;
2609 CompareInfo *compare = data;
2612 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2613 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2615 x1 = allocation1.x + allocation1.width / 2;
2616 x2 = allocation2.x + allocation2.width / 2;
2620 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2621 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2623 if (compare->reverse)
2624 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2626 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2629 return (x1 < x2) ? -1 : 1;
2633 gtk_container_focus_sort_left_right (GtkContainer *container,
2635 GtkDirectionType direction,
2636 GtkWidget *old_focus)
2638 CompareInfo compare;
2640 GdkRectangle old_allocation;
2642 compare.container = container;
2643 compare.reverse = (direction == GTK_DIR_LEFT);
2646 old_focus = find_old_focus (container, children);
2648 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2654 /* Delete widgets from list that don't match minimum criteria */
2656 compare_y1 = old_allocation.y;
2657 compare_y2 = old_allocation.y + old_allocation.height;
2659 if (direction == GTK_DIR_LEFT)
2660 compare_x = old_allocation.x;
2662 compare_x = old_allocation.x + old_allocation.width;
2664 tmp_list = children;
2667 GtkWidget *child = tmp_list->data;
2668 GList *next = tmp_list->next;
2669 gint child_y1, child_y2;
2670 GdkRectangle child_allocation;
2672 if (child != old_focus)
2674 if (get_allocation_coords (container, child, &child_allocation))
2676 child_y1 = child_allocation.y;
2677 child_y2 = child_allocation.y + child_allocation.height;
2679 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2680 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2681 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2683 children = g_list_delete_link (children, tmp_list);
2687 children = g_list_delete_link (children, tmp_list);
2693 compare.y = (compare_y1 + compare_y2) / 2;
2694 compare.x = old_allocation.x + old_allocation.width / 2;
2698 /* No old focus widget, need to figure out starting x,y some other way
2700 GtkAllocation allocation;
2701 GtkWidget *widget = GTK_WIDGET (container);
2702 GdkRectangle old_focus_rect;
2704 gtk_widget_get_allocation (widget, &allocation);
2706 if (old_focus_coords (container, &old_focus_rect))
2708 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2712 if (!gtk_widget_get_has_window (widget))
2713 compare.y = allocation.y + allocation.height / 2;
2715 compare.y = allocation.height / 2;
2718 if (!gtk_widget_get_has_window (widget))
2719 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2721 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2724 children = g_list_sort_with_data (children, left_right_compare, &compare);
2726 if (compare.reverse)
2727 children = g_list_reverse (children);
2733 * gtk_container_focus_sort:
2734 * @container: a #GtkContainer
2735 * @children: a list of descendents of @container (they don't
2736 * have to be direct children)
2737 * @direction: focus direction
2738 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2739 * to determine this automatically.
2740 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2741 * which is the only @direction we use currently,
2742 * so perhaps this argument should be removed)
2744 * Sorts @children in the correct order for focusing with
2745 * direction type @direction.
2747 * Return value: a copy of @children, sorted in correct focusing order,
2748 * with children that aren't suitable for focusing in this direction
2752 _gtk_container_focus_sort (GtkContainer *container,
2754 GtkDirectionType direction,
2755 GtkWidget *old_focus)
2757 GList *visible_children = NULL;
2761 if (gtk_widget_get_realized (children->data))
2762 visible_children = g_list_prepend (visible_children, children->data);
2763 children = children->next;
2768 case GTK_DIR_TAB_FORWARD:
2769 case GTK_DIR_TAB_BACKWARD:
2770 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2773 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2776 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2779 g_assert_not_reached ();
2785 gtk_container_focus_move (GtkContainer *container,
2787 GtkDirectionType direction)
2789 GtkContainerPrivate *priv = container->priv;
2790 GtkWidget *focus_child;
2793 focus_child = priv->focus_child;
2797 child = children->data;
2798 children = children->next;
2805 if (focus_child == child)
2809 if (gtk_widget_child_focus (child, direction))
2813 else if (gtk_widget_is_drawable (child) &&
2814 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2816 if (gtk_widget_child_focus (child, direction))
2826 gtk_container_children_callback (GtkWidget *widget,
2827 gpointer client_data)
2831 children = (GList**) client_data;
2832 *children = g_list_prepend (*children, widget);
2836 chain_widget_destroyed (GtkWidget *widget,
2839 GtkContainer *container;
2842 container = GTK_CONTAINER (user_data);
2844 chain = g_object_get_data (G_OBJECT (container),
2845 "gtk-container-focus-chain");
2847 chain = g_list_remove (chain, widget);
2849 g_signal_handlers_disconnect_by_func (widget,
2850 chain_widget_destroyed,
2853 g_object_set_data (G_OBJECT (container),
2854 I_("gtk-container-focus-chain"),
2859 * gtk_container_set_focus_chain:
2860 * @container: a #GtkContainer
2861 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2862 * the new focus chain
2864 * Sets a focus chain, overriding the one computed automatically by GTK+.
2866 * In principle each widget in the chain should be a descendant of the
2867 * container, but this is not enforced by this method, since it's allowed
2868 * to set the focus chain before you pack the widgets, or have a widget
2869 * in the chain that isn't always packed. The necessary checks are done
2870 * when the focus chain is actually traversed.
2873 gtk_container_set_focus_chain (GtkContainer *container,
2874 GList *focusable_widgets)
2878 GtkContainerPrivate *priv;
2880 g_return_if_fail (GTK_IS_CONTAINER (container));
2882 priv = container->priv;
2884 if (priv->has_focus_chain)
2885 gtk_container_unset_focus_chain (container);
2887 priv->has_focus_chain = TRUE;
2890 tmp_list = focusable_widgets;
2891 while (tmp_list != NULL)
2893 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2895 /* In principle each widget in the chain should be a descendant
2896 * of the container, but we don't want to check that here. It's
2897 * expensive and also it's allowed to set the focus chain before
2898 * you pack the widgets, or have a widget in the chain that isn't
2899 * always packed. So we check for ancestor during actual traversal.
2902 chain = g_list_prepend (chain, tmp_list->data);
2904 g_signal_connect (tmp_list->data,
2906 G_CALLBACK (chain_widget_destroyed),
2909 tmp_list = g_list_next (tmp_list);
2912 chain = g_list_reverse (chain);
2914 g_object_set_data (G_OBJECT (container),
2915 I_("gtk-container-focus-chain"),
2920 * gtk_container_get_focus_chain:
2921 * @container: a #GtkContainer
2922 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
2923 * to store the focus chain of the
2924 * container, or %NULL. You should free this list
2925 * using g_list_free() when you are done with it, however
2926 * no additional reference count is added to the
2927 * individual widgets in the focus chain.
2929 * Retrieves the focus chain of the container, if one has been
2930 * set explicitly. If no focus chain has been explicitly
2931 * set, GTK+ computes the focus chain based on the positions
2932 * of the children. In that case, GTK+ stores %NULL in
2933 * @focusable_widgets and returns %FALSE.
2935 * Return value: %TRUE if the focus chain of the container
2936 * has been set explicitly.
2939 gtk_container_get_focus_chain (GtkContainer *container,
2940 GList **focus_chain)
2942 GtkContainerPrivate *priv;
2944 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
2946 priv = container->priv;
2950 if (priv->has_focus_chain)
2951 *focus_chain = g_list_copy (get_focus_chain (container));
2953 *focus_chain = NULL;
2956 return priv->has_focus_chain;
2960 * gtk_container_unset_focus_chain:
2961 * @container: a #GtkContainer
2963 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
2966 gtk_container_unset_focus_chain (GtkContainer *container)
2968 GtkContainerPrivate *priv;
2970 g_return_if_fail (GTK_IS_CONTAINER (container));
2972 priv = container->priv;
2974 if (priv->has_focus_chain)
2979 chain = get_focus_chain (container);
2981 priv->has_focus_chain = FALSE;
2983 g_object_set_data (G_OBJECT (container),
2984 I_("gtk-container-focus-chain"),
2988 while (tmp_list != NULL)
2990 g_signal_handlers_disconnect_by_func (tmp_list->data,
2991 chain_widget_destroyed,
2994 tmp_list = g_list_next (tmp_list);
2997 g_list_free (chain);
3002 * gtk_container_set_focus_vadjustment:
3003 * @container: a #GtkContainer
3004 * @adjustment: an adjustment which should be adjusted when the focus
3005 * is moved among the descendents of @container
3007 * Hooks up an adjustment to focus handling in a container, so when a
3008 * child of the container is focused, the adjustment is scrolled to
3009 * show that widget. This function sets the vertical alignment. See
3010 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
3011 * the adjustment and gtk_container_set_focus_hadjustment() for setting
3012 * the horizontal adjustment.
3014 * The adjustments have to be in pixel units and in the same coordinate
3015 * system as the allocation for immediate children of the container.
3018 gtk_container_set_focus_vadjustment (GtkContainer *container,
3019 GtkAdjustment *adjustment)
3021 g_return_if_fail (GTK_IS_CONTAINER (container));
3023 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3026 g_object_ref (adjustment);
3028 g_object_set_qdata_full (G_OBJECT (container),
3035 * gtk_container_get_focus_vadjustment:
3036 * @container: a #GtkContainer
3038 * Retrieves the vertical focus adjustment for the container. See
3039 * gtk_container_set_focus_vadjustment().
3041 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
3042 * none has been set.
3045 gtk_container_get_focus_vadjustment (GtkContainer *container)
3047 GtkAdjustment *vadjustment;
3049 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3051 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
3057 * gtk_container_set_focus_hadjustment:
3058 * @container: a #GtkContainer
3059 * @adjustment: an adjustment which should be adjusted when the focus is
3060 * moved among the descendents of @container
3062 * Hooks up an adjustment to focus handling in a container, so when a child
3063 * of the container is focused, the adjustment is scrolled to show that
3064 * widget. This function sets the horizontal alignment.
3065 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
3066 * the adjustment and gtk_container_set_focus_vadjustment() for setting
3067 * the vertical adjustment.
3069 * The adjustments have to be in pixel units and in the same coordinate
3070 * system as the allocation for immediate children of the container.
3073 gtk_container_set_focus_hadjustment (GtkContainer *container,
3074 GtkAdjustment *adjustment)
3076 g_return_if_fail (GTK_IS_CONTAINER (container));
3078 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3081 g_object_ref (adjustment);
3083 g_object_set_qdata_full (G_OBJECT (container),
3090 * gtk_container_get_focus_hadjustment:
3091 * @container: a #GtkContainer
3093 * Retrieves the horizontal focus adjustment for the container. See
3094 * gtk_container_set_focus_hadjustment ().
3096 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3097 * none has been set.
3100 gtk_container_get_focus_hadjustment (GtkContainer *container)
3102 GtkAdjustment *hadjustment;
3104 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3106 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3113 gtk_container_show_all (GtkWidget *widget)
3115 g_return_if_fail (GTK_IS_CONTAINER (widget));
3117 gtk_container_foreach (GTK_CONTAINER (widget),
3118 (GtkCallback) gtk_widget_show_all,
3120 gtk_widget_show (widget);
3124 gtk_container_draw_child (GtkWidget *child,
3125 gpointer client_data)
3128 GtkWidget *container;
3130 } *data = client_data;
3132 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3138 gtk_container_draw (GtkWidget *widget,
3142 GtkWidget *container;
3146 data.container = widget;
3149 gtk_container_forall (GTK_CONTAINER (widget),
3150 gtk_container_draw_child,
3157 gtk_container_map_child (GtkWidget *child,
3158 gpointer client_data)
3160 if (gtk_widget_get_visible (child) &&
3161 gtk_widget_get_child_visible (child) &&
3162 !gtk_widget_get_mapped (child))
3163 gtk_widget_map (child);
3167 gtk_container_map (GtkWidget *widget)
3169 gtk_widget_set_mapped (widget, TRUE);
3171 gtk_container_forall (GTK_CONTAINER (widget),
3172 gtk_container_map_child,
3175 if (gtk_widget_get_has_window (widget))
3176 gdk_window_show (gtk_widget_get_window (widget));
3180 gtk_container_unmap (GtkWidget *widget)
3182 gtk_widget_set_mapped (widget, FALSE);
3184 /* hide our window first so user doesn't see all the child windows
3185 * vanishing one by one. (only matters these days if one of the
3186 * children has an actual native window instead of client-side
3187 * window, e.g. a GtkSocket would)
3189 if (gtk_widget_get_has_window (widget))
3190 gdk_window_hide (gtk_widget_get_window (widget));
3192 gtk_container_forall (GTK_CONTAINER (widget),
3193 (GtkCallback)gtk_widget_unmap,
3198 * gtk_container_propagate_draw:
3199 * @container: a #GtkContainer
3200 * @child: a child of @container
3201 * @cr: Cairo context as passed to the container. If you want to use @cr
3202 * in container's draw function, consider using cairo_save() and
3203 * cairo_restore() before calling this function.
3205 * When a container receives a call to the draw function, it must send
3206 * synthetic #GtkWidget::draw calls to all children that don't have their
3207 * own #GdkWindows. This function provides a convenient way of doing this.
3208 * A container, when it receives a call to its #GtkWidget::draw function,
3209 * calls gtk_container_propagate_draw() once for each child, passing in
3210 * the @cr the container received.
3212 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3213 * and deciding whether the draw needs to be sent to the child. It is a
3214 * convenient and optimized way of getting the same effect as calling
3215 * gtk_widget_draw() on the child directly.
3217 * In most cases, a container can simply either inherit the
3218 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3219 * and then chain to the ::draw implementation from #GtkContainer.
3222 gtk_container_propagate_draw (GtkContainer *container,
3226 GdkEventExpose *event;
3227 GtkAllocation allocation;
3228 GdkWindow *window, *w;
3231 g_return_if_fail (GTK_IS_CONTAINER (container));
3232 g_return_if_fail (GTK_IS_WIDGET (child));
3233 g_return_if_fail (cr != NULL);
3235 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3237 event = _gtk_cairo_get_event (cr);
3240 if (gtk_widget_get_has_window (child) ||
3241 gtk_widget_get_window (child) != event->window)
3247 /* translate coordinates. Ugly business, that. */
3248 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3250 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3260 window = gtk_widget_get_window (GTK_WIDGET (container));
3262 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3265 gdk_window_get_position (w, &wx, &wy);
3276 if (!gtk_widget_get_has_window (child))
3278 gtk_widget_get_allocation (child, &allocation);
3283 cairo_translate (cr, x, y);
3285 _gtk_widget_draw_internal (child, cr, TRUE);
3291 _gtk_container_get_need_resize (GtkContainer *container)
3293 return container->priv->need_resize;
3297 _gtk_container_set_need_resize (GtkContainer *container,
3298 gboolean need_resize)
3300 container->priv->need_resize = need_resize;
3304 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3306 return container->priv->reallocate_redraws;
3310 * gtk_container_get_path_for_child:
3311 * @container: a #GtkContainer
3312 * @child: a child of @container
3314 * Returns a newly created widget path representing all the widget hierarchy
3315 * from the toplevel down to @child (this one not being included).
3317 * Returns: A newly created #GtkWidgetPath
3320 gtk_container_get_path_for_child (GtkContainer *container,
3323 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3324 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
3325 g_return_val_if_fail (container == (GtkContainer *) gtk_widget_get_parent (child), NULL);
3327 return GTK_CONTAINER_GET_CLASS (container)->get_path_for_child (container, child);