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 "gtkbuildable.h"
36 #include "gtkbuilderprivate.h"
37 #include "gtkprivate.h"
39 #include "gtkmarshalers.h"
40 #include "gtksizerequest.h"
41 #include "gtkwidgetprivate.h"
42 #include "gtkwindow.h"
44 #include "gtktoolbar.h"
45 #include <gobject/gobjectnotifyqueue.c>
46 #include <gobject/gvaluecollector.h>
50 * SECTION:gtkcontainer
51 * @Short_description: Base class for widgets which contain other widgets
52 * @Title: GtkContainer
54 * A GTK+ user interface is constructed by nesting widgets inside widgets.
55 * Container widgets are the inner nodes in the resulting tree of widgets:
56 * they contain other widgets. So, for example, you might have a #GtkWindow
57 * containing a #GtkFrame containing a #GtkLabel. If you wanted an image instead
58 * of a textual label inside the frame, you might replace the #GtkLabel widget
59 * with a #GtkImage widget.
61 * There are two major kinds of container widgets in GTK+. Both are subclasses
62 * of the abstract GtkContainer base class.
64 * The first type of container widget has a single child widget and derives
65 * from #GtkBin. These containers are <emphasis>decorators</emphasis>, which
66 * add some kind of functionality to the child. For example, a #GtkButton makes
67 * it's child into a clickable button; a #GtkFrame draws a frame around it's child
68 * and a #GtkWindow places it's child widget inside a top-level window.
70 * The second type of container can have more than one child; it's purpose is to
71 * manage <emphasis>layout</emphasis>. This means that these containers assign
72 * sizes and positions to their children. For example, a #GtkHBox arranges it's
73 * children in a horizontal row, and a #GtkTable arranges the widgets it contains
74 * in a two-dimensional grid.
76 * <refsect2 id="container-geometry-management">
77 * <title>Height for width geometry management</title>
79 * GTK+ uses a height-for-width (and width-for-height) geometry management system.
80 * Height-for-width means that a widget can change how much vertical space it needs,
81 * depending on the amount of horizontal space that it is given (and similar for
84 * There are some things to keep in mind when implementing container widgets
85 * that make use of GTK+'s height for width geometry management system; first
86 * of all it's important to note that a container must prioritize one of it's
87 * dimensions, that is to say that a widget or container can only have a
88 * #GtkSizeRequestMode that is %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
89 * %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT. However, every widget and container
90 * must be able to respond to the APIs for both dimensions, i.e. even if a
91 * widget has a request mode that is height-for-width, it is possible that
92 * it's parent will request it's sizes using the width-for-height APIs.
94 * To ensure that everything works properly, here are some guidelines to follow
95 * when implementing height-for-width (or width-for-height) containers.
97 * Each request mode has 2 virtual methods involved. Height-for-width apis run
98 * through gtk_widget_get_preferred_width() and then through gtk_widget_get_preferred_height_for_width().
99 * When handling requests in the opposite #GtkSizeRequestMode it is important that
100 * every widget request at least enough space to display all of it's content at all times.
102 * When gtk_widget_get_preferred_height() is called on a container that is height-for-width,
103 * the container must return the height for minimum width, this is easily achieved by
104 * simply calling the reverse apis implemented for itself as follows:
106 * <programlisting><![CDATA[
108 * foo_container_get_preferred_height (GtkWidget *widget, gint *min_height, gint *nat_height)
110 * if (i_am_in_height_for_width_mode)
114 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
115 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_height_for_width (widget, min_width,
116 * min_height, nat_height);
120 * ... many containers support both request modes, execute the real width-for-height
121 * request here by returning the collective heights of all widgets that are
122 * stacked vertically (or whatever is appropriate for this container) ...
125 * ]]></programlisting>
127 * Similarly, when gtk_widget_get_preferred_width_for_height() is called for a container or widget
128 * that is height-for-width, it then only needs to return the base minimum width like so:
130 * <programlisting><![CDATA[
132 * foo_container_get_preferred_width_for_height (GtkWidget *widget, gint for_height,
133 * gint *min_width, gint *nat_width)
135 * if (i_am_in_height_for_width_mode)
137 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, min_width, nat_width);
141 * ... execute the real width-for-height request here based on required width
142 * of the children collectively if the container were to be allocated the said height ...
145 * ]]></programlisting>
147 * Furthermore, in order to ensure correct height-for-width requests it is important
148 * to check the input width against the real required minimum width, this can
149 * easily be achieved as follows:
151 * <programlisting><![CDATA[
153 * foo_container_get_preferred_height_for_width (GtkWidget *widget, gint for_width,
154 * gint *min_height, gint *nat_height)
156 * if (i_am_in_height_for_width_mode)
160 * GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, &min_width, NULL);
162 * for_width = MAX (min_width, for_width);
164 * execute_real_height_for_width_request_code (widget, for_width, min_height, nat_height);
168 * ... fall back on virtual results as mentioned in the previous example ...
171 * ]]></programlisting>
173 * Height for width requests are generally implemented in terms of a virtual allocation
174 * of widgets in the input orientation. Assuming an height-for-width request mode, a container
175 * would implement the <function>get_preferred_height_for_width()</function> virtual function by first calling
176 * gtk_widget_get_preferred_width() for each of its children.
178 * For each potential group of children that are lined up horizontally the values returned by
179 * gtk_widget_get_preferred_width() should be collected in an array of #GtkRequestedSize structures;
180 * any child spacing should be removed from the input @for_width and then the collective size be
181 * allocated using the gtk_distribute_natural_allocation() convenience function
183 * The container will then move on to request the preferred height for each child by using
184 * gtk_widget_get_preferred_height_for_width() and using the sizes stored in the #GtkRequestedSize array.
186 * When it comes time to allocate a height-for-width container, it's again important
187 * to consider that a container has to prioritize one dimension over the other. So if
188 * a container is a height-for-width container it must first allocate all widgets horizontally
189 * using a #GtkRequestedSize array and gtk_distribute_natural_allocation() and then add any
190 * extra space (if and where appropriate) for the widget to expand.
192 * After adding all the expand space, the container assumes it was allocated sufficient
193 * height to fit all of its content. At this time, the container must use the total horizontal sizes
194 * of each widget to request the height-for-width of each of its children and store the requests in a
195 * #GtkRequestedSize array for any widgets that stack vertically (for tabular containers this can
196 * be generalized into the heights and widths of rows and columns).
197 * The vertical space must then again be distributed using gtk_distribute_natural_allocation()
198 * while this time considering the allocated height of the widget minus any vertical spacing
199 * that the container adds. Then vertical expand space should be added where appropriate if available
200 * and go on to actually allocating the child widgets.
202 * See <link linkend="geometry-management">GtkWidget's geometry management section</link>
203 * to learn more about implementing height-for-width geometry management for widgets.
206 * <refsect2 id="child-properties">
207 * <title>Child properties</title>
209 * GtkContainer introduces <emphasis>child properties</emphasis>.
210 * These are object properties that are not specific
211 * to either the container or the contained widget, but rather to their relation.
212 * Typical examples of child properties are the position or pack-type of a widget
213 * which is contained in a #GtkBox.
215 * Use gtk_container_class_install_child_property() to install child properties
216 * for a container class and gtk_container_class_find_child_property() or
217 * gtk_container_class_list_child_properties() to get information about existing
220 * To set the value of a child property, use gtk_container_child_set_property(),
221 * gtk_container_child_set() or gtk_container_child_set_valist().
222 * To obtain the value of a child property, use
223 * gtk_container_child_get_property(), gtk_container_child_get() or
224 * gtk_container_child_get_valist(). To emit notification about child property
225 * changes, use gtk_widget_child_notify().
228 * <refsect2 id="GtkContainer-BUILDER-UI">
229 * <title>GtkContainer as GtkBuildable</title>
231 * The GtkContainer implementation of the GtkBuildable interface
232 * supports a <packing> element for children, which can
233 * contain multiple <property> elements that specify
234 * child properties for the child.
236 * <title>Child properties in UI definitions</title>
237 * <programlisting><![CDATA[
238 * <object class="GtkVBox">
240 * <object class="GtkLabel"/>
242 * <property name="pack-type">start</property>
246 * ]]></programlisting>
248 * Since 2.16, child properties can also be marked as translatable using
249 * the same "translatable", "comments" and "context" attributes that are used
250 * for regular properties.
256 struct _GtkContainerPrivate
258 GtkWidget *focus_child;
260 guint border_width : 16;
262 guint has_focus_chain : 1;
263 guint need_resize : 1;
264 guint reallocate_redraws : 1;
265 guint resize_mode : 2;
283 #define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
284 #define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
287 /* --- prototypes --- */
288 static void gtk_container_base_class_init (GtkContainerClass *klass);
289 static void gtk_container_base_class_finalize (GtkContainerClass *klass);
290 static void gtk_container_class_init (GtkContainerClass *klass);
291 static void gtk_container_init (GtkContainer *container);
292 static void gtk_container_destroy (GtkWidget *widget);
293 static void gtk_container_set_property (GObject *object,
297 static void gtk_container_get_property (GObject *object,
301 static void gtk_container_add_unimplemented (GtkContainer *container,
303 static void gtk_container_remove_unimplemented (GtkContainer *container,
305 static void gtk_container_real_check_resize (GtkContainer *container);
306 static void gtk_container_compute_expand (GtkWidget *widget,
308 gboolean *vexpand_p);
309 static gboolean gtk_container_focus (GtkWidget *widget,
310 GtkDirectionType direction);
311 static void gtk_container_real_set_focus_child (GtkContainer *container,
314 static gboolean gtk_container_focus_move (GtkContainer *container,
316 GtkDirectionType direction);
317 static void gtk_container_children_callback (GtkWidget *widget,
318 gpointer client_data);
319 static void gtk_container_show_all (GtkWidget *widget);
320 static gint gtk_container_draw (GtkWidget *widget,
322 static void gtk_container_map (GtkWidget *widget);
323 static void gtk_container_unmap (GtkWidget *widget);
324 static void gtk_container_adjust_size_request (GtkWidget *widget,
325 GtkOrientation orientation,
329 static void gtk_container_adjust_size_allocation (GtkWidget *widget,
330 GtkAllocation *allocation);
332 static gchar* gtk_container_child_default_composite_name (GtkContainer *container,
336 static void gtk_container_buildable_init (GtkBuildableIface *iface);
337 static void gtk_container_buildable_add_child (GtkBuildable *buildable,
341 static gboolean gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
344 const gchar *tagname,
345 GMarkupParser *parser,
347 static void gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
350 const gchar *tagname,
354 /* --- variables --- */
355 static const gchar vadjustment_key[] = "gtk-vadjustment";
356 static guint vadjustment_key_id = 0;
357 static const gchar hadjustment_key[] = "gtk-hadjustment";
358 static guint hadjustment_key_id = 0;
359 static GSList *container_resize_queue = NULL;
360 static guint container_signals[LAST_SIGNAL] = { 0 };
361 static GtkWidgetClass *parent_class = NULL;
362 extern GParamSpecPool *_gtk_widget_child_property_pool;
363 extern GObjectNotifyContext *_gtk_widget_child_property_notify_context;
364 static GtkBuildableIface *parent_buildable_iface;
367 /* --- functions --- */
369 gtk_container_get_type (void)
371 static GType container_type = 0;
375 const GTypeInfo container_info =
377 sizeof (GtkContainerClass),
378 (GBaseInitFunc) gtk_container_base_class_init,
379 (GBaseFinalizeFunc) gtk_container_base_class_finalize,
380 (GClassInitFunc) gtk_container_class_init,
381 NULL /* class_finalize */,
382 NULL /* class_data */,
383 sizeof (GtkContainer),
385 (GInstanceInitFunc) gtk_container_init,
386 NULL, /* value_table */
389 const GInterfaceInfo buildable_info =
391 (GInterfaceInitFunc) gtk_container_buildable_init,
397 g_type_register_static (GTK_TYPE_WIDGET, I_("GtkContainer"),
398 &container_info, G_TYPE_FLAG_ABSTRACT);
400 g_type_add_interface_static (container_type,
406 return container_type;
410 gtk_container_base_class_init (GtkContainerClass *class)
412 /* reset instance specifc class fields that don't get inherited */
413 class->set_child_property = NULL;
414 class->get_child_property = NULL;
418 gtk_container_base_class_finalize (GtkContainerClass *class)
422 list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class));
423 for (node = list; node; node = node->next)
425 GParamSpec *pspec = node->data;
427 g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec);
428 PARAM_SPEC_SET_PARAM_ID (pspec, 0);
429 g_param_spec_unref (pspec);
435 gtk_container_class_init (GtkContainerClass *class)
437 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
438 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
440 parent_class = g_type_class_peek_parent (class);
442 vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
443 hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
445 gobject_class->set_property = gtk_container_set_property;
446 gobject_class->get_property = gtk_container_get_property;
448 widget_class->destroy = gtk_container_destroy;
449 widget_class->compute_expand = gtk_container_compute_expand;
450 widget_class->show_all = gtk_container_show_all;
451 widget_class->draw = gtk_container_draw;
452 widget_class->map = gtk_container_map;
453 widget_class->unmap = gtk_container_unmap;
454 widget_class->focus = gtk_container_focus;
456 widget_class->adjust_size_request = gtk_container_adjust_size_request;
457 widget_class->adjust_size_allocation = gtk_container_adjust_size_allocation;
459 class->add = gtk_container_add_unimplemented;
460 class->remove = gtk_container_remove_unimplemented;
461 class->check_resize = gtk_container_real_check_resize;
462 class->forall = NULL;
463 class->set_focus_child = gtk_container_real_set_focus_child;
464 class->child_type = NULL;
465 class->composite_name = gtk_container_child_default_composite_name;
467 g_object_class_install_property (gobject_class,
469 g_param_spec_enum ("resize-mode",
471 P_("Specify how resize events are handled"),
472 GTK_TYPE_RESIZE_MODE,
474 GTK_PARAM_READWRITE));
475 g_object_class_install_property (gobject_class,
477 g_param_spec_uint ("border-width",
479 P_("The width of the empty border outside the containers children"),
483 GTK_PARAM_READWRITE));
484 g_object_class_install_property (gobject_class,
486 g_param_spec_object ("child",
488 P_("Can be used to add a new child to the container"),
490 GTK_PARAM_WRITABLE));
491 container_signals[ADD] =
492 g_signal_new (I_("add"),
493 G_OBJECT_CLASS_TYPE (gobject_class),
495 G_STRUCT_OFFSET (GtkContainerClass, add),
497 _gtk_marshal_VOID__OBJECT,
500 container_signals[REMOVE] =
501 g_signal_new (I_("remove"),
502 G_OBJECT_CLASS_TYPE (gobject_class),
504 G_STRUCT_OFFSET (GtkContainerClass, remove),
506 _gtk_marshal_VOID__OBJECT,
509 container_signals[CHECK_RESIZE] =
510 g_signal_new (I_("check-resize"),
511 G_OBJECT_CLASS_TYPE (gobject_class),
513 G_STRUCT_OFFSET (GtkContainerClass, check_resize),
515 _gtk_marshal_VOID__VOID,
517 container_signals[SET_FOCUS_CHILD] =
518 g_signal_new (I_("set-focus-child"),
519 G_OBJECT_CLASS_TYPE (gobject_class),
521 G_STRUCT_OFFSET (GtkContainerClass, set_focus_child),
523 _gtk_marshal_VOID__OBJECT,
527 g_type_class_add_private (class, sizeof (GtkContainerPrivate));
531 gtk_container_buildable_init (GtkBuildableIface *iface)
533 parent_buildable_iface = g_type_interface_peek_parent (iface);
534 iface->add_child = gtk_container_buildable_add_child;
535 iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
536 iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
540 gtk_container_buildable_add_child (GtkBuildable *buildable,
547 GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
549 else if (GTK_IS_WIDGET (child) &&
550 gtk_widget_get_parent (GTK_WIDGET (child)) == NULL)
552 gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
555 g_warning ("Cannot add an object of type %s to a container of type %s",
556 g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
560 gtk_container_buildable_set_child_property (GtkContainer *container,
567 GValue gvalue = { 0, };
568 GError *error = NULL;
570 pspec = gtk_container_class_find_child_property
571 (G_OBJECT_GET_CLASS (container), name);
574 g_warning ("%s does not have a property called %s",
575 g_type_name (G_OBJECT_TYPE (container)), name);
579 if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
581 g_warning ("Could not read property %s:%s with value %s of type %s: %s",
582 g_type_name (G_OBJECT_TYPE (container)),
585 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
587 g_error_free (error);
591 gtk_container_child_set_property (container, child, name, &gvalue);
592 g_value_unset (&gvalue);
597 GtkContainer *container;
599 gchar *child_prop_name;
601 gboolean translatable;
602 } PackingPropertiesData;
605 attributes_start_element (GMarkupParseContext *context,
606 const gchar *element_name,
608 const gchar **values,
612 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
615 if (strcmp (element_name, "property") == 0)
617 for (i = 0; names[i]; i++)
618 if (strcmp (names[i], "name") == 0)
619 parser_data->child_prop_name = g_strdup (values[i]);
620 else if (strcmp (names[i], "translatable") == 0)
622 if (!_gtk_builder_boolean_from_string (values[1],
623 &parser_data->translatable,
627 else if (strcmp (names[i], "comments") == 0)
628 ; /* for translators */
629 else if (strcmp (names[i], "context") == 0)
630 parser_data->context = g_strdup (values[1]);
632 g_warning ("Unsupported attribute for GtkContainer Child "
633 "property: %s\n", names[i]);
635 else if (strcmp (element_name, "packing") == 0)
638 g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
642 attributes_text_element (GMarkupParseContext *context,
648 PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
651 if (!parser_data->child_prop_name)
654 if (parser_data->translatable && text_len)
657 domain = gtk_builder_get_translation_domain (parser_data->builder);
659 value = _gtk_builder_parser_translate (domain,
660 parser_data->context,
665 value = g_strdup (text);
668 gtk_container_buildable_set_child_property (parser_data->container,
669 parser_data->builder,
671 parser_data->child_prop_name,
674 g_free (parser_data->child_prop_name);
675 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,
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->builder = builder;
707 parser_data->container = GTK_CONTAINER (buildable);
708 parser_data->child = GTK_WIDGET (child);
709 parser_data->child_prop_name = NULL;
711 *parser = attributes_parser;
720 gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
723 const gchar *tagname,
726 if (strcmp (tagname, "packing") == 0)
728 g_slice_free (PackingPropertiesData, (gpointer)data);
733 if (parent_buildable_iface->custom_tag_end)
734 parent_buildable_iface->custom_tag_end (buildable, builder,
735 child, tagname, data);
740 * gtk_container_child_type:
741 * @container: a #GtkContainer
743 * Returns the type of the children supported by the container.
745 * Note that this may return %G_TYPE_NONE to indicate that no more
746 * children can be added, e.g. for a #GtkPaned which already has two
749 * Return value: a #GType.
752 gtk_container_child_type (GtkContainer *container)
755 GtkContainerClass *class;
757 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
759 class = GTK_CONTAINER_GET_CLASS (container);
760 if (class->child_type)
761 slot = class->child_type (container);
768 /* --- GtkContainer child property mechanism --- */
770 container_get_child_property (GtkContainer *container,
775 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
777 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
781 container_set_child_property (GtkContainer *container,
785 GObjectNotifyQueue *nqueue)
787 GValue tmp_value = { 0, };
788 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
790 /* provide a copy to work from, convert (if necessary) and validate */
791 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
792 if (!g_value_transform (value, &tmp_value))
793 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
795 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
796 G_VALUE_TYPE_NAME (value));
797 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
799 gchar *contents = g_strdup_value_contents (value);
801 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
803 G_VALUE_TYPE_NAME (value),
805 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
810 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
811 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
813 g_value_unset (&tmp_value);
817 * gtk_container_child_get_valist:
818 * @container: a #GtkContainer
819 * @child: a widget which is a child of @container
820 * @first_property_name: the name of the first property to get
821 * @var_args: return location for the first property, followed
822 * optionally by more name/return location pairs, followed by %NULL
824 * Gets the values of one or more child properties for @child and @container.
827 gtk_container_child_get_valist (GtkContainer *container,
829 const gchar *first_property_name,
834 g_return_if_fail (GTK_IS_CONTAINER (container));
835 g_return_if_fail (GTK_IS_WIDGET (child));
836 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
838 g_object_ref (container);
839 g_object_ref (child);
841 name = first_property_name;
844 GValue value = { 0, };
848 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
850 G_OBJECT_TYPE (container),
854 g_warning ("%s: container class `%s' has no child property named `%s'",
856 G_OBJECT_TYPE_NAME (container),
860 if (!(pspec->flags & G_PARAM_READABLE))
862 g_warning ("%s: child property `%s' of container class `%s' is not readable",
865 G_OBJECT_TYPE_NAME (container));
868 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
869 container_get_child_property (container, child, pspec, &value);
870 G_VALUE_LCOPY (&value, var_args, 0, &error);
873 g_warning ("%s: %s", G_STRLOC, error);
875 g_value_unset (&value);
878 g_value_unset (&value);
879 name = va_arg (var_args, gchar*);
882 g_object_unref (child);
883 g_object_unref (container);
887 * gtk_container_child_get_property:
888 * @container: a #GtkContainer
889 * @child: a widget which is a child of @container
890 * @property_name: the name of the property to get
891 * @value: a location to return the value
893 * Gets the value of a child property for @child and @container.
896 gtk_container_child_get_property (GtkContainer *container,
898 const gchar *property_name,
903 g_return_if_fail (GTK_IS_CONTAINER (container));
904 g_return_if_fail (GTK_IS_WIDGET (child));
905 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
906 g_return_if_fail (property_name != NULL);
907 g_return_if_fail (G_IS_VALUE (value));
909 g_object_ref (container);
910 g_object_ref (child);
911 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
912 G_OBJECT_TYPE (container), TRUE);
914 g_warning ("%s: container class `%s' has no child property named `%s'",
916 G_OBJECT_TYPE_NAME (container),
918 else if (!(pspec->flags & G_PARAM_READABLE))
919 g_warning ("%s: child property `%s' of container class `%s' is not readable",
922 G_OBJECT_TYPE_NAME (container));
925 GValue *prop_value, tmp_value = { 0, };
927 /* auto-conversion of the callers value type
929 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
931 g_value_reset (value);
934 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
936 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
938 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
939 G_VALUE_TYPE_NAME (value));
940 g_object_unref (child);
941 g_object_unref (container);
946 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
947 prop_value = &tmp_value;
949 container_get_child_property (container, child, pspec, prop_value);
950 if (prop_value != value)
952 g_value_transform (prop_value, value);
953 g_value_unset (&tmp_value);
956 g_object_unref (child);
957 g_object_unref (container);
961 * gtk_container_child_set_valist:
962 * @container: a #GtkContainer
963 * @child: a widget which is a child of @container
964 * @first_property_name: the name of the first property to set
965 * @var_args: a %NULL-terminated list of property names and values, starting
966 * with @first_prop_name
968 * Sets one or more child properties for @child and @container.
971 gtk_container_child_set_valist (GtkContainer *container,
973 const gchar *first_property_name,
976 GObjectNotifyQueue *nqueue;
979 g_return_if_fail (GTK_IS_CONTAINER (container));
980 g_return_if_fail (GTK_IS_WIDGET (child));
981 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
983 g_object_ref (container);
984 g_object_ref (child);
986 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
987 name = first_property_name;
990 GValue value = { 0, };
992 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
994 G_OBJECT_TYPE (container),
998 g_warning ("%s: container class `%s' has no child property named `%s'",
1000 G_OBJECT_TYPE_NAME (container),
1004 if (!(pspec->flags & G_PARAM_WRITABLE))
1006 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1009 G_OBJECT_TYPE_NAME (container));
1012 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
1013 G_VALUE_COLLECT (&value, var_args, 0, &error);
1016 g_warning ("%s: %s", G_STRLOC, error);
1019 /* we purposely leak the value here, it might not be
1020 * in a sane state if an error condition occoured
1024 container_set_child_property (container, child, pspec, &value, nqueue);
1025 g_value_unset (&value);
1026 name = va_arg (var_args, gchar*);
1028 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1030 g_object_unref (container);
1031 g_object_unref (child);
1035 * gtk_container_child_set_property:
1036 * @container: a #GtkContainer
1037 * @child: a widget which is a child of @container
1038 * @property_name: the name of the property to set
1039 * @value: the value to set the property to
1041 * Sets a child property for @child and @container.
1044 gtk_container_child_set_property (GtkContainer *container,
1046 const gchar *property_name,
1047 const GValue *value)
1049 GObjectNotifyQueue *nqueue;
1052 g_return_if_fail (GTK_IS_CONTAINER (container));
1053 g_return_if_fail (GTK_IS_WIDGET (child));
1054 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1055 g_return_if_fail (property_name != NULL);
1056 g_return_if_fail (G_IS_VALUE (value));
1058 g_object_ref (container);
1059 g_object_ref (child);
1061 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1062 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1063 G_OBJECT_TYPE (container), TRUE);
1065 g_warning ("%s: container class `%s' has no child property named `%s'",
1067 G_OBJECT_TYPE_NAME (container),
1069 else if (!(pspec->flags & G_PARAM_WRITABLE))
1070 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1073 G_OBJECT_TYPE_NAME (container));
1076 container_set_child_property (container, child, pspec, value, nqueue);
1078 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1079 g_object_unref (container);
1080 g_object_unref (child);
1084 * gtk_container_add_with_properties:
1085 * @container: a #GtkContainer
1086 * @widget: a widget to be placed inside @container
1087 * @first_prop_name: the name of the first child property to set
1088 * @Varargs: a %NULL-terminated list of property names and values, starting
1089 * with @first_prop_name
1091 * Adds @widget to @container, setting child properties at the same time.
1092 * See gtk_container_add() and gtk_container_child_set() for more details.
1095 gtk_container_add_with_properties (GtkContainer *container,
1097 const gchar *first_prop_name,
1100 g_return_if_fail (GTK_IS_CONTAINER (container));
1101 g_return_if_fail (GTK_IS_WIDGET (widget));
1102 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1104 g_object_ref (container);
1105 g_object_ref (widget);
1106 gtk_widget_freeze_child_notify (widget);
1108 g_signal_emit (container, container_signals[ADD], 0, widget);
1109 if (gtk_widget_get_parent (widget))
1113 va_start (var_args, first_prop_name);
1114 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1118 gtk_widget_thaw_child_notify (widget);
1119 g_object_unref (widget);
1120 g_object_unref (container);
1124 * gtk_container_child_set:
1125 * @container: a #GtkContainer
1126 * @child: a widget which is a child of @container
1127 * @first_prop_name: the name of the first property to set
1128 * @Varargs: a %NULL-terminated list of property names and values, starting
1129 * with @first_prop_name
1131 * Sets one or more child properties for @child and @container.
1134 gtk_container_child_set (GtkContainer *container,
1136 const gchar *first_prop_name,
1141 g_return_if_fail (GTK_IS_CONTAINER (container));
1142 g_return_if_fail (GTK_IS_WIDGET (child));
1143 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1145 va_start (var_args, first_prop_name);
1146 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1151 * gtk_container_child_get:
1152 * @container: a #GtkContainer
1153 * @child: a widget which is a child of @container
1154 * @first_prop_name: the name of the first property to get
1155 * @Varargs: return location for the first property, followed
1156 * optionally by more name/return location pairs, followed by %NULL
1158 * Gets the values of one or more child properties for @child and @container.
1161 gtk_container_child_get (GtkContainer *container,
1163 const gchar *first_prop_name,
1168 g_return_if_fail (GTK_IS_CONTAINER (container));
1169 g_return_if_fail (GTK_IS_WIDGET (child));
1170 g_return_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container));
1172 va_start (var_args, first_prop_name);
1173 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1178 * gtk_container_class_install_child_property:
1179 * @cclass: a #GtkContainerClass
1180 * @property_id: the id for the property
1181 * @pspec: the #GParamSpec for the property
1183 * Installs a child property on a container class.
1186 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1190 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1191 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1192 if (pspec->flags & G_PARAM_WRITABLE)
1193 g_return_if_fail (cclass->set_child_property != NULL);
1194 if (pspec->flags & G_PARAM_READABLE)
1195 g_return_if_fail (cclass->get_child_property != NULL);
1196 g_return_if_fail (property_id > 0);
1197 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1198 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1199 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1201 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1203 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1204 G_OBJECT_CLASS_NAME (cclass),
1208 g_param_spec_ref (pspec);
1209 g_param_spec_sink (pspec);
1210 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1211 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1215 * gtk_container_class_find_child_property:
1216 * @cclass: a #GtkContainerClass
1217 * @property_name: the name of the child property to find
1218 * @returns: (allow-none): the #GParamSpec of the child property or %NULL if @class has no
1219 * child property with that name.
1221 * Finds a child property of a container class by name.
1224 gtk_container_class_find_child_property (GObjectClass *cclass,
1225 const gchar *property_name)
1227 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1228 g_return_val_if_fail (property_name != NULL, NULL);
1230 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1232 G_OBJECT_CLASS_TYPE (cclass),
1237 * gtk_container_class_list_child_properties:
1238 * @cclass: a #GtkContainerClass
1239 * @n_properties: location to return the number of child properties found
1240 * @returns: a newly allocated %NULL-terminated array of #GParamSpec*.
1241 * The 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 GtkContainerPrivate *priv;
1619 GtkContainer *resize_container;
1623 g_return_if_fail (GTK_IS_CONTAINER (container));
1625 priv = container->priv;
1626 widget = GTK_WIDGET (container);
1628 resize_container = gtk_container_get_resize_container (container);
1632 _gtk_widget_set_alloc_needed (widget, TRUE);
1633 _gtk_widget_set_width_request_needed (widget, TRUE);
1634 _gtk_widget_set_height_request_needed (widget, TRUE);
1636 if ((resize_container && widget == GTK_WIDGET (resize_container)) ||
1637 !(parent = gtk_widget_get_parent (widget)))
1643 if (resize_container && !invalidate_only)
1645 if (gtk_widget_get_visible (GTK_WIDGET (resize_container)) &&
1646 (gtk_widget_is_toplevel (GTK_WIDGET (resize_container)) ||
1647 gtk_widget_get_realized (GTK_WIDGET (resize_container))))
1649 switch (resize_container->priv->resize_mode)
1651 case GTK_RESIZE_QUEUE:
1652 if (!_gtk_widget_get_resize_pending (GTK_WIDGET (resize_container)))
1654 _gtk_widget_set_resize_pending (GTK_WIDGET (resize_container), TRUE);
1655 if (container_resize_queue == NULL)
1656 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1657 gtk_container_idle_sizer,
1659 container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
1663 case GTK_RESIZE_IMMEDIATE:
1664 gtk_container_check_resize (resize_container);
1667 case GTK_RESIZE_PARENT:
1668 g_assert_not_reached ();
1674 /* we need to let hidden resize containers know that something
1675 * changed while they where hidden (currently only evaluated by
1678 resize_container->priv->need_resize = TRUE;
1684 * _gtk_container_queue_resize:
1685 * @container: a #GtkContainer
1687 * Determines the "resize container" in the hierarchy above this container
1688 * (typically the toplevel, but other containers can be set as resize
1689 * containers with gtk_container_set_resize_mode()), marks the container
1690 * and all parents up to and including the resize container as needing
1691 * to have sizes recompted, and if necessary adds the resize container
1692 * to the queue of containers that will be resized out at idle.
1695 _gtk_container_queue_resize (GtkContainer *container)
1697 _gtk_container_queue_resize_internal (container, FALSE);
1701 * _gtk_container_resize_invalidate:
1702 * @container: a #GtkContainer
1704 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1705 * actually queue the resize container for resize.
1708 _gtk_container_resize_invalidate (GtkContainer *container)
1710 _gtk_container_queue_resize_internal (container, TRUE);
1714 gtk_container_check_resize (GtkContainer *container)
1716 g_return_if_fail (GTK_IS_CONTAINER (container));
1718 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1722 gtk_container_real_check_resize (GtkContainer *container)
1724 GtkWidget *widget = GTK_WIDGET (container);
1725 GtkAllocation allocation;
1726 GtkRequisition requisition;
1728 gtk_widget_get_preferred_size (widget,
1729 &requisition, NULL);
1730 gtk_widget_get_allocation (widget, &allocation);
1732 if (requisition.width > allocation.width ||
1733 requisition.height > allocation.height)
1735 if (GTK_IS_RESIZE_CONTAINER (container))
1737 gtk_widget_size_allocate (widget, &allocation);
1738 gtk_widget_set_allocation (widget, &allocation);
1741 gtk_widget_queue_resize (widget);
1745 gtk_container_resize_children (container);
1749 /* The container hasn't changed size but one of its children
1750 * queued a resize request. Which means that the allocation
1751 * is not sufficient for the requisition of some child.
1752 * We've already performed a size request at this point,
1753 * so we simply need to reallocate and let the allocation
1754 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1757 gtk_container_resize_children (GtkContainer *container)
1759 GtkAllocation allocation;
1762 /* resizing invariants:
1763 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1764 * containers that have an idle sizer pending must be flagged with
1767 g_return_if_fail (GTK_IS_CONTAINER (container));
1769 widget = GTK_WIDGET (container);
1770 gtk_widget_get_allocation (widget, &allocation);
1772 gtk_widget_size_allocate (widget, &allocation);
1773 gtk_widget_set_allocation (widget, &allocation);
1777 gtk_container_adjust_size_request (GtkWidget *widget,
1778 GtkOrientation orientation,
1783 GtkContainer *container;
1785 container = GTK_CONTAINER (widget);
1787 if (GTK_CONTAINER_GET_CLASS (widget)->handle_border_width)
1791 border_width = container->priv->border_width;
1793 *minimum_size += border_width * 2;
1794 *natural_size += border_width * 2;
1797 /* chain up last so gtk_widget_set_size_request() values
1798 * will have a chance to overwrite our border width.
1800 parent_class->adjust_size_request (widget, orientation, for_size,
1801 minimum_size, natural_size);
1805 gtk_container_adjust_size_allocation (GtkWidget *widget,
1806 GtkAllocation *allocation)
1808 GtkContainer *container;
1811 container = GTK_CONTAINER (widget);
1813 parent_class->adjust_size_allocation (widget, allocation);
1815 if (!GTK_CONTAINER_GET_CLASS (widget)->handle_border_width)
1818 border_width = container->priv->border_width;
1820 allocation->width -= border_width * 2;
1821 allocation->height -= border_width * 2;
1823 /* If we get a pathological too-small allocation to hold
1824 * even the border width, leave all allocation to the actual
1825 * widget, and leave x,y unchanged. (GtkWidget's min size is
1826 * 1x1 if you're wondering why <1 and not <0)
1828 * As long as we have space, set x,y properly.
1831 if (allocation->width < 1)
1833 allocation->width += border_width * 2;
1837 allocation->x += border_width;
1840 if (allocation->height < 1)
1842 allocation->height += border_width * 2;
1846 allocation->y += border_width;
1851 * gtk_container_class_handle_border_width:
1852 * @klass: the class struct of a #GtkContainer subclass
1854 * Modifies a subclass of #GtkContainerClass to automatically add and
1855 * remove the border-width setting on GtkContainer. This allows the
1856 * subclass to ignore the border width in its size request and
1857 * allocate methods. The intent is for a subclass to invoke this
1858 * in its class_init function.
1860 * gtk_container_class_handle_border_width() is necessary because it
1861 * would break API too badly to make this behavior the default. So
1862 * subclasses must "opt in" to the parent class handling border_width
1866 gtk_container_class_handle_border_width (GtkContainerClass *klass)
1868 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
1870 klass->handle_border_width = TRUE;
1874 * gtk_container_forall:
1875 * @container: a #GtkContainer
1876 * @callback: a callback
1877 * @callback_data: callback user data
1879 * Invokes @callback on each child of @container, including children
1880 * that are considered "internal" (implementation details of the
1881 * container). "Internal" children generally weren't added by the user
1882 * of the container, but were added by the container implementation
1883 * itself. Most applications should use gtk_container_foreach(),
1884 * rather than gtk_container_forall().
1887 gtk_container_forall (GtkContainer *container,
1888 GtkCallback callback,
1889 gpointer callback_data)
1891 GtkContainerClass *class;
1893 g_return_if_fail (GTK_IS_CONTAINER (container));
1894 g_return_if_fail (callback != NULL);
1896 class = GTK_CONTAINER_GET_CLASS (container);
1899 class->forall (container, TRUE, callback, callback_data);
1903 * gtk_container_foreach:
1904 * @container: a #GtkContainer
1905 * @callback: (scope call): a callback
1906 * @callback_data: callback user data
1908 * Invokes @callback on each non-internal child of @container. See
1909 * gtk_container_forall() for details on what constitutes an
1910 * "internal" child. Most applications should use
1911 * gtk_container_foreach(), rather than gtk_container_forall().
1914 gtk_container_foreach (GtkContainer *container,
1915 GtkCallback callback,
1916 gpointer callback_data)
1918 GtkContainerClass *class;
1920 g_return_if_fail (GTK_IS_CONTAINER (container));
1921 g_return_if_fail (callback != NULL);
1923 class = GTK_CONTAINER_GET_CLASS (container);
1926 class->forall (container, FALSE, callback, callback_data);
1930 * gtk_container_set_focus_child:
1931 * @container: a #GtkContainer
1932 * @child: (allow-none): a #GtkWidget, or %NULL
1934 * Sets, or unsets if @child is %NULL, the focused child of @container.
1936 * This function emits the GtkContainer::set_focus_child signal of
1937 * @container. Implementations of #GtkContainer can override the
1938 * default behaviour by overriding the class closure of this signal.
1940 * This is function is mostly meant to be used by widgets. Applications can use
1941 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
1944 gtk_container_set_focus_child (GtkContainer *container,
1947 g_return_if_fail (GTK_IS_CONTAINER (container));
1949 g_return_if_fail (GTK_IS_WIDGET (child));
1951 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
1955 * gtk_container_get_focus_child:
1956 * @container: a #GtkContainer
1958 * Returns the current focus child widget inside @container. This is not the
1959 * currently focused widget. That can be obtained by calling
1960 * gtk_window_get_focus().
1962 * Returns: The child widget which will recieve the focus inside @container when
1963 * the @conatiner is focussed, or %NULL if none is set.
1968 gtk_container_get_focus_child (GtkContainer *container)
1970 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
1972 return container->priv->focus_child;
1976 * gtk_container_get_children:
1977 * @container: a #GtkContainer
1979 * Returns the container's non-internal children. See
1980 * gtk_container_forall() for details on what constitutes an "internal" child.
1982 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
1985 gtk_container_get_children (GtkContainer *container)
1987 GList *children = NULL;
1989 gtk_container_foreach (container,
1990 gtk_container_children_callback,
1993 return g_list_reverse (children);
1997 gtk_container_child_position_callback (GtkWidget *widget,
1998 gpointer client_data)
2004 } *data = client_data;
2007 if (data->child == widget)
2008 data->index = data->i;
2012 gtk_container_child_default_composite_name (GtkContainer *container,
2022 /* fallback implementation */
2026 gtk_container_forall (container,
2027 gtk_container_child_position_callback,
2030 name = g_strdup_printf ("%s-%u",
2031 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2038 _gtk_container_child_composite_name (GtkContainer *container,
2041 gboolean composite_child;
2043 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2044 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2045 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2047 g_object_get (child, "composite-child", &composite_child, NULL);
2048 if (composite_child)
2050 static GQuark quark_composite_name = 0;
2053 if (!quark_composite_name)
2054 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2056 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2059 GtkContainerClass *class;
2061 class = GTK_CONTAINER_GET_CLASS (container);
2062 if (class->composite_name)
2063 name = class->composite_name (container, child);
2066 name = g_strdup (name);
2077 } ComputeExpandData;
2080 gtk_container_compute_expand_callback (GtkWidget *widget,
2081 gpointer client_data)
2083 ComputeExpandData *data = client_data;
2085 /* note that we don't get_expand on the child if we already know we
2086 * have to expand, so we only recurse into children until we find
2087 * one that expands and then we basically don't do any more
2088 * work. This means that we can leave some children in a
2089 * need_compute_expand state, which is fine, as long as GtkWidget
2090 * doesn't rely on an invariant that "if a child has
2091 * need_compute_expand, its parents also do"
2093 * gtk_widget_compute_expand() always returns FALSE if the
2094 * child is !visible so that's taken care of.
2096 data->hexpand = data->hexpand ||
2097 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2099 data->vexpand = data->vexpand ||
2100 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2104 gtk_container_compute_expand (GtkWidget *widget,
2105 gboolean *hexpand_p,
2106 gboolean *vexpand_p)
2108 ComputeExpandData data;
2110 data.hexpand = FALSE;
2111 data.vexpand = FALSE;
2113 gtk_container_forall (GTK_CONTAINER (widget),
2114 gtk_container_compute_expand_callback,
2117 *hexpand_p = data.hexpand;
2118 *vexpand_p = data.vexpand;
2122 gtk_container_real_set_focus_child (GtkContainer *container,
2125 GtkContainerPrivate *priv;
2127 g_return_if_fail (GTK_IS_CONTAINER (container));
2128 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2130 priv = container->priv;
2132 if (child != priv->focus_child)
2134 if (priv->focus_child)
2135 g_object_unref (priv->focus_child);
2136 priv->focus_child = child;
2137 if (priv->focus_child)
2138 g_object_ref (priv->focus_child);
2142 /* check for h/v adjustments
2144 if (priv->focus_child)
2146 GtkAdjustment *hadj;
2147 GtkAdjustment *vadj;
2148 GtkAllocation allocation;
2149 GtkWidget *focus_child;
2152 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2153 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2157 focus_child = priv->focus_child;
2158 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2160 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2163 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2166 gtk_widget_get_allocation (priv->focus_child, &allocation);
2170 gtk_widget_get_allocation (focus_child, &allocation);
2173 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2176 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2182 get_focus_chain (GtkContainer *container)
2184 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2187 /* same as gtk_container_get_children, except it includes internals
2190 gtk_container_get_all_children (GtkContainer *container)
2192 GList *children = NULL;
2194 gtk_container_forall (container,
2195 gtk_container_children_callback,
2202 gtk_container_focus (GtkWidget *widget,
2203 GtkDirectionType direction)
2206 GList *sorted_children;
2208 GtkContainer *container;
2209 GtkContainerPrivate *priv;
2211 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2213 container = GTK_CONTAINER (widget);
2214 priv = container->priv;
2218 if (gtk_widget_get_can_focus (widget))
2220 if (!gtk_widget_has_focus (widget))
2222 gtk_widget_grab_focus (widget);
2228 /* Get a list of the containers children, allowing focus
2229 * chain to override.
2231 if (priv->has_focus_chain)
2232 children = g_list_copy (get_focus_chain (container));
2234 children = gtk_container_get_all_children (container);
2236 if (priv->has_focus_chain &&
2237 (direction == GTK_DIR_TAB_FORWARD ||
2238 direction == GTK_DIR_TAB_BACKWARD))
2240 sorted_children = g_list_copy (children);
2242 if (direction == GTK_DIR_TAB_BACKWARD)
2243 sorted_children = g_list_reverse (sorted_children);
2246 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2248 return_val = gtk_container_focus_move (container, sorted_children, direction);
2250 g_list_free (sorted_children);
2251 g_list_free (children);
2258 tab_compare (gconstpointer a,
2262 GtkAllocation child1_allocation, child2_allocation;
2263 const GtkWidget *child1 = a;
2264 const GtkWidget *child2 = b;
2265 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2267 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2268 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2270 gint y1 = child1_allocation.y + child1_allocation.height / 2;
2271 gint y2 = child2_allocation.y + child2_allocation.height / 2;
2275 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2276 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2278 if (text_direction == GTK_TEXT_DIR_RTL)
2279 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2281 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2284 return (y1 < y2) ? -1 : 1;
2288 gtk_container_focus_sort_tab (GtkContainer *container,
2290 GtkDirectionType direction,
2291 GtkWidget *old_focus)
2293 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2294 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2296 /* if we are going backwards then reverse the order
2299 if (direction == GTK_DIR_TAB_BACKWARD)
2300 children = g_list_reverse (children);
2305 /* Get coordinates of @widget's allocation with respect to
2306 * allocation of @container.
2309 get_allocation_coords (GtkContainer *container,
2311 GdkRectangle *allocation)
2313 gtk_widget_set_allocation (widget, allocation);
2315 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2316 0, 0, &allocation->x, &allocation->y);
2319 /* Look for a child in @children that is intermediate between
2320 * the focus widget and container. This widget, if it exists,
2321 * acts as the starting widget for focus navigation.
2324 find_old_focus (GtkContainer *container,
2327 GList *tmp_list = children;
2330 GtkWidget *child = tmp_list->data;
2331 GtkWidget *widget = child;
2333 while (widget && widget != (GtkWidget *)container)
2337 parent = gtk_widget_get_parent (widget);
2339 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2348 tmp_list = tmp_list->next;
2355 old_focus_coords (GtkContainer *container,
2356 GdkRectangle *old_focus_rect)
2358 GtkWidget *widget = GTK_WIDGET (container);
2359 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2360 GtkWidget *old_focus;
2362 if (GTK_IS_WINDOW (toplevel))
2364 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2366 return get_allocation_coords (container, old_focus, old_focus_rect);
2372 typedef struct _CompareInfo CompareInfo;
2376 GtkContainer *container;
2383 up_down_compare (gconstpointer a,
2387 GdkRectangle allocation1;
2388 GdkRectangle allocation2;
2389 CompareInfo *compare = data;
2392 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2393 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2395 y1 = allocation1.y + allocation1.height / 2;
2396 y2 = allocation2.y + allocation2.height / 2;
2400 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2401 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2403 if (compare->reverse)
2404 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2406 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2409 return (y1 < y2) ? -1 : 1;
2413 gtk_container_focus_sort_up_down (GtkContainer *container,
2415 GtkDirectionType direction,
2416 GtkWidget *old_focus)
2418 CompareInfo compare;
2420 GdkRectangle old_allocation;
2422 compare.container = container;
2423 compare.reverse = (direction == GTK_DIR_UP);
2426 old_focus = find_old_focus (container, children);
2428 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2434 /* Delete widgets from list that don't match minimum criteria */
2436 compare_x1 = old_allocation.x;
2437 compare_x2 = old_allocation.x + old_allocation.width;
2439 if (direction == GTK_DIR_UP)
2440 compare_y = old_allocation.y;
2442 compare_y = old_allocation.y + old_allocation.height;
2444 tmp_list = children;
2447 GtkWidget *child = tmp_list->data;
2448 GList *next = tmp_list->next;
2449 gint child_x1, child_x2;
2450 GdkRectangle child_allocation;
2452 if (child != old_focus)
2454 if (get_allocation_coords (container, child, &child_allocation))
2456 child_x1 = child_allocation.x;
2457 child_x2 = child_allocation.x + child_allocation.width;
2459 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2460 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2461 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2463 children = g_list_delete_link (children, tmp_list);
2467 children = g_list_delete_link (children, tmp_list);
2473 compare.x = (compare_x1 + compare_x2) / 2;
2474 compare.y = old_allocation.y + old_allocation.height / 2;
2478 /* No old focus widget, need to figure out starting x,y some other way
2480 GtkAllocation allocation;
2481 GtkWidget *widget = GTK_WIDGET (container);
2482 GdkRectangle old_focus_rect;
2484 gtk_widget_get_allocation (widget, &allocation);
2486 if (old_focus_coords (container, &old_focus_rect))
2488 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2492 if (!gtk_widget_get_has_window (widget))
2493 compare.x = allocation.x + allocation.width / 2;
2495 compare.x = allocation.width / 2;
2498 if (!gtk_widget_get_has_window (widget))
2499 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2501 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2504 children = g_list_sort_with_data (children, up_down_compare, &compare);
2506 if (compare.reverse)
2507 children = g_list_reverse (children);
2513 left_right_compare (gconstpointer a,
2517 GdkRectangle allocation1;
2518 GdkRectangle allocation2;
2519 CompareInfo *compare = data;
2522 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2523 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2525 x1 = allocation1.x + allocation1.width / 2;
2526 x2 = allocation2.x + allocation2.width / 2;
2530 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2531 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2533 if (compare->reverse)
2534 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2536 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2539 return (x1 < x2) ? -1 : 1;
2543 gtk_container_focus_sort_left_right (GtkContainer *container,
2545 GtkDirectionType direction,
2546 GtkWidget *old_focus)
2548 CompareInfo compare;
2550 GdkRectangle old_allocation;
2552 compare.container = container;
2553 compare.reverse = (direction == GTK_DIR_LEFT);
2556 old_focus = find_old_focus (container, children);
2558 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2564 /* Delete widgets from list that don't match minimum criteria */
2566 compare_y1 = old_allocation.y;
2567 compare_y2 = old_allocation.y + old_allocation.height;
2569 if (direction == GTK_DIR_LEFT)
2570 compare_x = old_allocation.x;
2572 compare_x = old_allocation.x + old_allocation.width;
2574 tmp_list = children;
2577 GtkWidget *child = tmp_list->data;
2578 GList *next = tmp_list->next;
2579 gint child_y1, child_y2;
2580 GdkRectangle child_allocation;
2582 if (child != old_focus)
2584 if (get_allocation_coords (container, child, &child_allocation))
2586 child_y1 = child_allocation.y;
2587 child_y2 = child_allocation.y + child_allocation.height;
2589 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2590 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2591 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2593 children = g_list_delete_link (children, tmp_list);
2597 children = g_list_delete_link (children, tmp_list);
2603 compare.y = (compare_y1 + compare_y2) / 2;
2604 compare.x = old_allocation.x + old_allocation.width / 2;
2608 /* No old focus widget, need to figure out starting x,y some other way
2610 GtkAllocation allocation;
2611 GtkWidget *widget = GTK_WIDGET (container);
2612 GdkRectangle old_focus_rect;
2614 gtk_widget_get_allocation (widget, &allocation);
2616 if (old_focus_coords (container, &old_focus_rect))
2618 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2622 if (!gtk_widget_get_has_window (widget))
2623 compare.y = allocation.y + allocation.height / 2;
2625 compare.y = allocation.height / 2;
2628 if (!gtk_widget_get_has_window (widget))
2629 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2631 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2634 children = g_list_sort_with_data (children, left_right_compare, &compare);
2636 if (compare.reverse)
2637 children = g_list_reverse (children);
2643 * gtk_container_focus_sort:
2644 * @container: a #GtkContainer
2645 * @children: a list of descendents of @container (they don't
2646 * have to be direct children)
2647 * @direction: focus direction
2648 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2649 * to determine this automatically.
2650 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2651 * which is the only @direction we use currently,
2652 * so perhaps this argument should be removed)
2654 * Sorts @children in the correct order for focusing with
2655 * direction type @direction.
2657 * Return value: a copy of @children, sorted in correct focusing order,
2658 * with children that aren't suitable for focusing in this direction
2662 _gtk_container_focus_sort (GtkContainer *container,
2664 GtkDirectionType direction,
2665 GtkWidget *old_focus)
2667 GList *visible_children = NULL;
2671 if (gtk_widget_get_realized (children->data))
2672 visible_children = g_list_prepend (visible_children, children->data);
2673 children = children->next;
2678 case GTK_DIR_TAB_FORWARD:
2679 case GTK_DIR_TAB_BACKWARD:
2680 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2683 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2686 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2689 g_assert_not_reached ();
2695 gtk_container_focus_move (GtkContainer *container,
2697 GtkDirectionType direction)
2699 GtkContainerPrivate *priv = container->priv;
2700 GtkWidget *focus_child;
2703 focus_child = priv->focus_child;
2707 child = children->data;
2708 children = children->next;
2715 if (focus_child == child)
2719 if (gtk_widget_child_focus (child, direction))
2723 else if (gtk_widget_is_drawable (child) &&
2724 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2726 if (gtk_widget_child_focus (child, direction))
2736 gtk_container_children_callback (GtkWidget *widget,
2737 gpointer client_data)
2741 children = (GList**) client_data;
2742 *children = g_list_prepend (*children, widget);
2746 chain_widget_destroyed (GtkWidget *widget,
2749 GtkContainer *container;
2752 container = GTK_CONTAINER (user_data);
2754 chain = g_object_get_data (G_OBJECT (container),
2755 "gtk-container-focus-chain");
2757 chain = g_list_remove (chain, widget);
2759 g_signal_handlers_disconnect_by_func (widget,
2760 chain_widget_destroyed,
2763 g_object_set_data (G_OBJECT (container),
2764 I_("gtk-container-focus-chain"),
2769 * gtk_container_set_focus_chain:
2770 * @container: a #GtkContainer
2771 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2772 * the new focus chain
2774 * Sets a focus chain, overriding the one computed automatically by GTK+.
2776 * In principle each widget in the chain should be a descendant of the
2777 * container, but this is not enforced by this method, since it's allowed
2778 * to set the focus chain before you pack the widgets, or have a widget
2779 * in the chain that isn't always packed. The necessary checks are done
2780 * when the focus chain is actually traversed.
2783 gtk_container_set_focus_chain (GtkContainer *container,
2784 GList *focusable_widgets)
2788 GtkContainerPrivate *priv;
2790 g_return_if_fail (GTK_IS_CONTAINER (container));
2792 priv = container->priv;
2794 if (priv->has_focus_chain)
2795 gtk_container_unset_focus_chain (container);
2797 priv->has_focus_chain = TRUE;
2800 tmp_list = focusable_widgets;
2801 while (tmp_list != NULL)
2803 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2805 /* In principle each widget in the chain should be a descendant
2806 * of the container, but we don't want to check that here, it's
2807 * expensive and also it's allowed to set the focus chain before
2808 * you pack the widgets, or have a widget in the chain that isn't
2809 * always packed. So we check for ancestor during actual traversal.
2812 chain = g_list_prepend (chain, tmp_list->data);
2814 g_signal_connect (tmp_list->data,
2816 G_CALLBACK (chain_widget_destroyed),
2819 tmp_list = g_list_next (tmp_list);
2822 chain = g_list_reverse (chain);
2824 g_object_set_data (G_OBJECT (container),
2825 I_("gtk-container-focus-chain"),
2830 * gtk_container_get_focus_chain:
2831 * @container: a #GtkContainer
2832 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
2833 * to store the focus chain of the
2834 * container, or %NULL. You should free this list
2835 * using g_list_free() when you are done with it, however
2836 * no additional reference count is added to the
2837 * individual widgets in the focus chain.
2839 * Retrieves the focus chain of the container, if one has been
2840 * set explicitly. If no focus chain has been explicitly
2841 * set, GTK+ computes the focus chain based on the positions
2842 * of the children. In that case, GTK+ stores %NULL in
2843 * @focusable_widgets and returns %FALSE.
2845 * Return value: %TRUE if the focus chain of the container
2846 * has been set explicitly.
2849 gtk_container_get_focus_chain (GtkContainer *container,
2850 GList **focus_chain)
2852 GtkContainerPrivate *priv;
2854 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
2856 priv = container->priv;
2860 if (priv->has_focus_chain)
2861 *focus_chain = g_list_copy (get_focus_chain (container));
2863 *focus_chain = NULL;
2866 return priv->has_focus_chain;
2870 * gtk_container_unset_focus_chain:
2871 * @container: a #GtkContainer
2873 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
2876 gtk_container_unset_focus_chain (GtkContainer *container)
2878 GtkContainerPrivate *priv;
2880 g_return_if_fail (GTK_IS_CONTAINER (container));
2882 priv = container->priv;
2884 if (priv->has_focus_chain)
2889 chain = get_focus_chain (container);
2891 priv->has_focus_chain = FALSE;
2893 g_object_set_data (G_OBJECT (container),
2894 I_("gtk-container-focus-chain"),
2898 while (tmp_list != NULL)
2900 g_signal_handlers_disconnect_by_func (tmp_list->data,
2901 chain_widget_destroyed,
2904 tmp_list = g_list_next (tmp_list);
2907 g_list_free (chain);
2912 * gtk_container_set_focus_vadjustment:
2913 * @container: a #GtkContainer
2914 * @adjustment: an adjustment which should be adjusted when the focus
2915 * is moved among the descendents of @container
2917 * Hooks up an adjustment to focus handling in a container, so when a
2918 * child of the container is focused, the adjustment is scrolled to
2919 * show that widget. This function sets the vertical alignment. See
2920 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
2921 * the adjustment and gtk_container_set_focus_hadjustment() for setting
2922 * the horizontal adjustment.
2924 * The adjustments have to be in pixel units and in the same coordinate
2925 * system as the allocation for immediate children of the container.
2928 gtk_container_set_focus_vadjustment (GtkContainer *container,
2929 GtkAdjustment *adjustment)
2931 g_return_if_fail (GTK_IS_CONTAINER (container));
2933 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
2936 g_object_ref (adjustment);
2938 g_object_set_qdata_full (G_OBJECT (container),
2945 * gtk_container_get_focus_vadjustment:
2946 * @container: a #GtkContainer
2948 * Retrieves the vertical focus adjustment for the container. See
2949 * gtk_container_set_focus_vadjustment().
2951 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
2952 * none has been set.
2955 gtk_container_get_focus_vadjustment (GtkContainer *container)
2957 GtkAdjustment *vadjustment;
2959 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2961 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2967 * gtk_container_set_focus_hadjustment:
2968 * @container: a #GtkContainer
2969 * @adjustment: an adjustment which should be adjusted when the focus is
2970 * moved among the descendents of @container
2972 * Hooks up an adjustment to focus handling in a container, so when a child
2973 * of the container is focused, the adjustment is scrolled to show that
2974 * widget. This function sets the horizontal alignment.
2975 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
2976 * the adjustment and gtk_container_set_focus_vadjustment() for setting
2977 * the vertical adjustment.
2979 * The adjustments have to be in pixel units and in the same coordinate
2980 * system as the allocation for immediate children of the container.
2983 gtk_container_set_focus_hadjustment (GtkContainer *container,
2984 GtkAdjustment *adjustment)
2986 g_return_if_fail (GTK_IS_CONTAINER (container));
2988 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
2991 g_object_ref (adjustment);
2993 g_object_set_qdata_full (G_OBJECT (container),
3000 * gtk_container_get_focus_hadjustment:
3001 * @container: a #GtkContainer
3003 * Retrieves the horizontal focus adjustment for the container. See
3004 * gtk_container_set_focus_hadjustment ().
3006 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3007 * none has been set.
3010 gtk_container_get_focus_hadjustment (GtkContainer *container)
3012 GtkAdjustment *hadjustment;
3014 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3016 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3023 gtk_container_show_all (GtkWidget *widget)
3025 g_return_if_fail (GTK_IS_CONTAINER (widget));
3027 gtk_container_foreach (GTK_CONTAINER (widget),
3028 (GtkCallback) gtk_widget_show_all,
3030 gtk_widget_show (widget);
3034 gtk_container_draw_child (GtkWidget *child,
3035 gpointer client_data)
3038 GtkWidget *container;
3040 } *data = client_data;
3042 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3048 gtk_container_draw (GtkWidget *widget,
3052 GtkWidget *container;
3056 data.container = widget;
3059 gtk_container_forall (GTK_CONTAINER (widget),
3060 gtk_container_draw_child,
3067 gtk_container_map_child (GtkWidget *child,
3068 gpointer client_data)
3070 if (gtk_widget_get_visible (child) &&
3071 gtk_widget_get_child_visible (child) &&
3072 !gtk_widget_get_mapped (child))
3073 gtk_widget_map (child);
3077 gtk_container_map (GtkWidget *widget)
3079 gtk_widget_set_mapped (widget, TRUE);
3081 gtk_container_forall (GTK_CONTAINER (widget),
3082 gtk_container_map_child,
3085 if (gtk_widget_get_has_window (widget))
3086 gdk_window_show (gtk_widget_get_window (widget));
3090 gtk_container_unmap (GtkWidget *widget)
3092 gtk_widget_set_mapped (widget, FALSE);
3094 if (gtk_widget_get_has_window (widget))
3095 gdk_window_hide (gtk_widget_get_window (widget));
3097 gtk_container_forall (GTK_CONTAINER (widget),
3098 (GtkCallback)gtk_widget_unmap,
3103 * gtk_container_propagate_draw:
3104 * @container: a #GtkContainer
3105 * @child: a child of @container
3106 * @cr: Cairo context as passed to the container. If you want to use @cr
3107 * in container's draw function, consider using cairo_save() and
3108 * cairo_restore() before calling this function.
3110 * When a container receives a call to the draw function, it must send
3111 * synthetic #GtkWidget::draw calls to all children that don't have their
3112 * own #GdkWindows. This function provides a convenient way of doing this.
3113 * A container, when it receives a call to its #GtkWidget::draw function,
3114 * calls gtk_container_propagate_draw() once for each child, passing in
3115 * the @cr the container received.
3117 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3118 * and deciding whether the draw needs to be sent to the child. It is a
3119 * convenient and optimized way of getting the same effect as calling
3120 * gtk_widget_draw() on the child directly.
3122 * In most cases, a container can simply either inherit the
3123 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3124 * and then chain to the ::draw implementation from #GtkContainer.
3127 gtk_container_propagate_draw (GtkContainer *container,
3131 GdkEventExpose *event;
3132 GtkAllocation allocation;
3133 GdkWindow *window, *w;
3136 g_return_if_fail (GTK_IS_CONTAINER (container));
3137 g_return_if_fail (GTK_IS_WIDGET (child));
3138 g_return_if_fail (cr != NULL);
3140 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3142 event = _gtk_cairo_get_event (cr);
3145 if (gtk_widget_get_has_window (child) ||
3146 gtk_widget_get_window (child) != event->window)
3152 /* translate coordinates. Ugly business, that. */
3153 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3155 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3165 window = gtk_widget_get_window (GTK_WIDGET (container));
3167 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3170 gdk_window_get_position (w, &wx, &wy);
3181 if (!gtk_widget_get_has_window (child))
3183 gtk_widget_get_allocation (child, &allocation);
3188 cairo_translate (cr, x, y);
3190 _gtk_widget_draw_internal (child, cr, TRUE);
3196 _gtk_container_get_need_resize (GtkContainer *container)
3198 return container->priv->need_resize;
3202 _gtk_container_set_need_resize (GtkContainer *container,
3203 gboolean need_resize)
3205 container->priv->need_resize = need_resize;
3209 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3211 return container->priv->reallocate_redraws;