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 --- */
769 * gtk_container_child_notify:
770 * @container: the #GtkContainer
771 * @widget: the child widget
772 * @child_property: the name of a chld property installed on
773 * the class of @container
775 * Emits a #GtkWidget::child-notify signal for the
776 * <link linkend="child-properties">child property</link>
777 * @child_property on widget.
779 * This is an analogue of g_object_notify() for child properties.
781 * Also see gtk_widget_child_notify().
786 gtk_container_child_notify (GtkContainer *container,
788 const gchar *child_property)
793 g_return_if_fail (GTK_IS_CONTAINER (container));
794 g_return_if_fail (GTK_IS_WIDGET (widget));
795 g_return_if_fail (child_property != NULL);
797 obj = G_OBJECT (widget);
799 if (obj->ref_count == 0)
804 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
806 G_OBJECT_TYPE (container),
811 g_warning ("%s: container class `%s' has no child property named `%s'",
813 G_OBJECT_TYPE_NAME (container),
818 GObjectNotifyQueue *nqueue;
820 nqueue = g_object_notify_queue_freeze (obj, _gtk_widget_child_property_notify_context);
822 g_object_notify_queue_add (obj, nqueue, pspec);
823 g_object_notify_queue_thaw (obj, nqueue);
826 g_object_unref (obj);
830 container_get_child_property (GtkContainer *container,
835 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
837 class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
841 container_set_child_property (GtkContainer *container,
845 GObjectNotifyQueue *nqueue)
847 GValue tmp_value = { 0, };
848 GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
850 /* provide a copy to work from, convert (if necessary) and validate */
851 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
852 if (!g_value_transform (value, &tmp_value))
853 g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
855 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
856 G_VALUE_TYPE_NAME (value));
857 else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
859 gchar *contents = g_strdup_value_contents (value);
861 g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
863 G_VALUE_TYPE_NAME (value),
865 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
870 class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
871 g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
873 g_value_unset (&tmp_value);
877 * gtk_container_child_get_valist:
878 * @container: a #GtkContainer
879 * @child: a widget which is a child of @container
880 * @first_property_name: the name of the first property to get
881 * @var_args: return location for the first property, followed
882 * optionally by more name/return location pairs, followed by %NULL
884 * Gets the values of one or more child properties for @child and @container.
887 gtk_container_child_get_valist (GtkContainer *container,
889 const gchar *first_property_name,
894 g_return_if_fail (GTK_IS_CONTAINER (container));
895 g_return_if_fail (GTK_IS_WIDGET (child));
897 g_object_ref (container);
898 g_object_ref (child);
900 name = first_property_name;
903 GValue value = { 0, };
907 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
909 G_OBJECT_TYPE (container),
913 g_warning ("%s: container class `%s' has no child property named `%s'",
915 G_OBJECT_TYPE_NAME (container),
919 if (!(pspec->flags & G_PARAM_READABLE))
921 g_warning ("%s: child property `%s' of container class `%s' is not readable",
924 G_OBJECT_TYPE_NAME (container));
927 g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
928 container_get_child_property (container, child, pspec, &value);
929 G_VALUE_LCOPY (&value, var_args, 0, &error);
932 g_warning ("%s: %s", G_STRLOC, error);
934 g_value_unset (&value);
937 g_value_unset (&value);
938 name = va_arg (var_args, gchar*);
941 g_object_unref (child);
942 g_object_unref (container);
946 * gtk_container_child_get_property:
947 * @container: a #GtkContainer
948 * @child: a widget which is a child of @container
949 * @property_name: the name of the property to get
950 * @value: a location to return the value
952 * Gets the value of a child property for @child and @container.
955 gtk_container_child_get_property (GtkContainer *container,
957 const gchar *property_name,
962 g_return_if_fail (GTK_IS_CONTAINER (container));
963 g_return_if_fail (GTK_IS_WIDGET (child));
964 g_return_if_fail (property_name != NULL);
965 g_return_if_fail (G_IS_VALUE (value));
967 g_object_ref (container);
968 g_object_ref (child);
969 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
970 G_OBJECT_TYPE (container), TRUE);
972 g_warning ("%s: container class `%s' has no child property named `%s'",
974 G_OBJECT_TYPE_NAME (container),
976 else if (!(pspec->flags & G_PARAM_READABLE))
977 g_warning ("%s: child property `%s' of container class `%s' is not readable",
980 G_OBJECT_TYPE_NAME (container));
983 GValue *prop_value, tmp_value = { 0, };
985 /* auto-conversion of the callers value type
987 if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
989 g_value_reset (value);
992 else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
994 g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
996 g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
997 G_VALUE_TYPE_NAME (value));
998 g_object_unref (child);
999 g_object_unref (container);
1004 g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
1005 prop_value = &tmp_value;
1007 container_get_child_property (container, child, pspec, prop_value);
1008 if (prop_value != value)
1010 g_value_transform (prop_value, value);
1011 g_value_unset (&tmp_value);
1014 g_object_unref (child);
1015 g_object_unref (container);
1019 * gtk_container_child_set_valist:
1020 * @container: a #GtkContainer
1021 * @child: a widget which is a child of @container
1022 * @first_property_name: the name of the first property to set
1023 * @var_args: a %NULL-terminated list of property names and values, starting
1024 * with @first_prop_name
1026 * Sets one or more child properties for @child and @container.
1029 gtk_container_child_set_valist (GtkContainer *container,
1031 const gchar *first_property_name,
1034 GObjectNotifyQueue *nqueue;
1037 g_return_if_fail (GTK_IS_CONTAINER (container));
1038 g_return_if_fail (GTK_IS_WIDGET (child));
1040 g_object_ref (container);
1041 g_object_ref (child);
1043 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1044 name = first_property_name;
1047 GValue value = { 0, };
1048 gchar *error = NULL;
1049 GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1051 G_OBJECT_TYPE (container),
1055 g_warning ("%s: container class `%s' has no child property named `%s'",
1057 G_OBJECT_TYPE_NAME (container),
1061 if (!(pspec->flags & G_PARAM_WRITABLE))
1063 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1066 G_OBJECT_TYPE_NAME (container));
1070 G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
1071 var_args, 0, &error);
1074 g_warning ("%s: %s", G_STRLOC, error);
1077 /* we purposely leak the value here, it might not be
1078 * in a sane state if an error condition occoured
1082 container_set_child_property (container, child, pspec, &value, nqueue);
1083 g_value_unset (&value);
1084 name = va_arg (var_args, gchar*);
1086 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1088 g_object_unref (container);
1089 g_object_unref (child);
1093 * gtk_container_child_set_property:
1094 * @container: a #GtkContainer
1095 * @child: a widget which is a child of @container
1096 * @property_name: the name of the property to set
1097 * @value: the value to set the property to
1099 * Sets a child property for @child and @container.
1102 gtk_container_child_set_property (GtkContainer *container,
1104 const gchar *property_name,
1105 const GValue *value)
1107 GObjectNotifyQueue *nqueue;
1110 g_return_if_fail (GTK_IS_CONTAINER (container));
1111 g_return_if_fail (GTK_IS_WIDGET (child));
1112 g_return_if_fail (property_name != NULL);
1113 g_return_if_fail (G_IS_VALUE (value));
1115 g_object_ref (container);
1116 g_object_ref (child);
1118 nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
1119 pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
1120 G_OBJECT_TYPE (container), TRUE);
1122 g_warning ("%s: container class `%s' has no child property named `%s'",
1124 G_OBJECT_TYPE_NAME (container),
1126 else if (!(pspec->flags & G_PARAM_WRITABLE))
1127 g_warning ("%s: child property `%s' of container class `%s' is not writable",
1130 G_OBJECT_TYPE_NAME (container));
1133 container_set_child_property (container, child, pspec, value, nqueue);
1135 g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
1136 g_object_unref (container);
1137 g_object_unref (child);
1141 * gtk_container_add_with_properties:
1142 * @container: a #GtkContainer
1143 * @widget: a widget to be placed inside @container
1144 * @first_prop_name: the name of the first child property to set
1145 * @Varargs: a %NULL-terminated list of property names and values, starting
1146 * with @first_prop_name
1148 * Adds @widget to @container, setting child properties at the same time.
1149 * See gtk_container_add() and gtk_container_child_set() for more details.
1152 gtk_container_add_with_properties (GtkContainer *container,
1154 const gchar *first_prop_name,
1157 g_return_if_fail (GTK_IS_CONTAINER (container));
1158 g_return_if_fail (GTK_IS_WIDGET (widget));
1159 g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
1161 g_object_ref (container);
1162 g_object_ref (widget);
1163 gtk_widget_freeze_child_notify (widget);
1165 g_signal_emit (container, container_signals[ADD], 0, widget);
1166 if (gtk_widget_get_parent (widget))
1170 va_start (var_args, first_prop_name);
1171 gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
1175 gtk_widget_thaw_child_notify (widget);
1176 g_object_unref (widget);
1177 g_object_unref (container);
1181 * gtk_container_child_set:
1182 * @container: a #GtkContainer
1183 * @child: a widget which is a child of @container
1184 * @first_prop_name: the name of the first property to set
1185 * @Varargs: a %NULL-terminated list of property names and values, starting
1186 * with @first_prop_name
1188 * Sets one or more child properties for @child and @container.
1191 gtk_container_child_set (GtkContainer *container,
1193 const gchar *first_prop_name,
1198 va_start (var_args, first_prop_name);
1199 gtk_container_child_set_valist (container, child, first_prop_name, var_args);
1204 * gtk_container_child_get:
1205 * @container: a #GtkContainer
1206 * @child: a widget which is a child of @container
1207 * @first_prop_name: the name of the first property to get
1208 * @Varargs: return location for the first property, followed
1209 * optionally by more name/return location pairs, followed by %NULL
1211 * Gets the values of one or more child properties for @child and @container.
1214 gtk_container_child_get (GtkContainer *container,
1216 const gchar *first_prop_name,
1221 va_start (var_args, first_prop_name);
1222 gtk_container_child_get_valist (container, child, first_prop_name, var_args);
1227 * gtk_container_class_install_child_property:
1228 * @cclass: a #GtkContainerClass
1229 * @property_id: the id for the property
1230 * @pspec: the #GParamSpec for the property
1232 * Installs a child property on a container class.
1235 gtk_container_class_install_child_property (GtkContainerClass *cclass,
1239 g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
1240 g_return_if_fail (G_IS_PARAM_SPEC (pspec));
1241 if (pspec->flags & G_PARAM_WRITABLE)
1242 g_return_if_fail (cclass->set_child_property != NULL);
1243 if (pspec->flags & G_PARAM_READABLE)
1244 g_return_if_fail (cclass->get_child_property != NULL);
1245 g_return_if_fail (property_id > 0);
1246 g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
1247 if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
1248 g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
1250 if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
1252 g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
1253 G_OBJECT_CLASS_NAME (cclass),
1257 g_param_spec_ref (pspec);
1258 g_param_spec_sink (pspec);
1259 PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
1260 g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
1264 * gtk_container_class_find_child_property:
1265 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1266 * @property_name: the name of the child property to find
1267 * @returns: (transfer none): the #GParamSpec of the child property or
1268 * %NULL if @class has no child property with that name.
1270 * Finds a child property of a container class by name.
1273 gtk_container_class_find_child_property (GObjectClass *cclass,
1274 const gchar *property_name)
1276 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1277 g_return_val_if_fail (property_name != NULL, NULL);
1279 return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
1281 G_OBJECT_CLASS_TYPE (cclass),
1286 * gtk_container_class_list_child_properties:
1287 * @cclass: (type GtkContainerClass): a #GtkContainerClass
1288 * @n_properties: location to return the number of child properties found
1289 * @returns: (array length=n_properties) (transfer container): a newly
1290 * allocated %NULL-terminated array of #GParamSpec*. The
1291 * array must be freed with g_free().
1293 * Returns all child properties of a container class.
1296 gtk_container_class_list_child_properties (GObjectClass *cclass,
1297 guint *n_properties)
1299 GParamSpec **pspecs;
1302 g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
1304 pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
1305 G_OBJECT_CLASS_TYPE (cclass),
1314 gtk_container_add_unimplemented (GtkContainer *container,
1317 g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1321 gtk_container_remove_unimplemented (GtkContainer *container,
1324 g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
1328 gtk_container_init (GtkContainer *container)
1330 GtkContainerPrivate *priv;
1332 container->priv = G_TYPE_INSTANCE_GET_PRIVATE (container,
1334 GtkContainerPrivate);
1335 priv = container->priv;
1337 priv->focus_child = NULL;
1338 priv->border_width = 0;
1339 priv->need_resize = FALSE;
1340 priv->resize_mode = GTK_RESIZE_PARENT;
1341 priv->reallocate_redraws = FALSE;
1345 gtk_container_destroy (GtkWidget *widget)
1347 GtkContainer *container = GTK_CONTAINER (widget);
1348 GtkContainerPrivate *priv = container->priv;
1350 if (_gtk_widget_get_resize_pending (GTK_WIDGET (container)))
1351 _gtk_container_dequeue_resize_handler (container);
1353 if (priv->focus_child)
1355 g_object_unref (priv->focus_child);
1356 priv->focus_child = NULL;
1359 /* do this before walking child widgets, to avoid
1360 * removing children from focus chain one by one.
1362 if (priv->has_focus_chain)
1363 gtk_container_unset_focus_chain (container);
1365 gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
1367 GTK_WIDGET_CLASS (parent_class)->destroy (widget);
1371 gtk_container_set_property (GObject *object,
1373 const GValue *value,
1376 GtkContainer *container = GTK_CONTAINER (object);
1380 case PROP_BORDER_WIDTH:
1381 gtk_container_set_border_width (container, g_value_get_uint (value));
1383 case PROP_RESIZE_MODE:
1384 gtk_container_set_resize_mode (container, g_value_get_enum (value));
1387 gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
1390 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1396 gtk_container_get_property (GObject *object,
1401 GtkContainer *container = GTK_CONTAINER (object);
1402 GtkContainerPrivate *priv = container->priv;
1406 case PROP_BORDER_WIDTH:
1407 g_value_set_uint (value, priv->border_width);
1409 case PROP_RESIZE_MODE:
1410 g_value_set_enum (value, priv->resize_mode);
1413 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1419 * gtk_container_set_border_width:
1420 * @container: a #GtkContainer
1421 * @border_width: amount of blank space to leave <emphasis>outside</emphasis>
1422 * the container. Valid values are in the range 0-65535 pixels.
1424 * Sets the border width of the container.
1426 * The border width of a container is the amount of space to leave
1427 * around the outside of the container. The only exception to this is
1428 * #GtkWindow; because toplevel windows can't leave space outside,
1429 * they leave the space inside. The border is added on all sides of
1430 * the container. To add space to only one side, one approach is to
1431 * create a #GtkAlignment widget, call gtk_widget_set_size_request()
1432 * to give it a size, and place it on the side of the container as
1436 gtk_container_set_border_width (GtkContainer *container,
1439 GtkContainerPrivate *priv;
1441 g_return_if_fail (GTK_IS_CONTAINER (container));
1443 priv = container->priv;
1445 if (priv->border_width != border_width)
1447 priv->border_width = border_width;
1448 g_object_notify (G_OBJECT (container), "border-width");
1450 if (gtk_widget_get_realized (GTK_WIDGET (container)))
1451 gtk_widget_queue_resize (GTK_WIDGET (container));
1456 * gtk_container_get_border_width:
1457 * @container: a #GtkContainer
1459 * Retrieves the border width of the container. See
1460 * gtk_container_set_border_width().
1462 * Return value: the current border width
1465 gtk_container_get_border_width (GtkContainer *container)
1467 g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
1469 return container->priv->border_width;
1473 * gtk_container_add:
1474 * @container: a #GtkContainer
1475 * @widget: a widget to be placed inside @container
1477 * Adds @widget to @container. Typically used for simple containers
1478 * such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
1479 * layout containers such as #GtkBox or #GtkTable, this function will
1480 * pick default packing parameters that may not be correct. So
1481 * consider functions such as gtk_box_pack_start() and
1482 * gtk_table_attach() as an alternative to gtk_container_add() in
1483 * those cases. A widget may be added to only one container at a time;
1484 * you can't place the same widget inside two different containers.
1487 gtk_container_add (GtkContainer *container,
1492 g_return_if_fail (GTK_IS_CONTAINER (container));
1493 g_return_if_fail (GTK_IS_WIDGET (widget));
1495 parent = gtk_widget_get_parent (widget);
1499 g_warning ("Attempting to add a widget with type %s to a container of "
1500 "type %s, but the widget is already inside a container of type %s, "
1501 "please use gtk_widget_reparent()" ,
1502 g_type_name (G_OBJECT_TYPE (widget)),
1503 g_type_name (G_OBJECT_TYPE (container)),
1504 g_type_name (G_OBJECT_TYPE (parent)));
1508 g_signal_emit (container, container_signals[ADD], 0, widget);
1512 * gtk_container_remove:
1513 * @container: a #GtkContainer
1514 * @widget: a current child of @container
1516 * Removes @widget from @container. @widget must be inside @container.
1517 * Note that @container will own a reference to @widget, and that this
1518 * may be the last reference held; so removing a widget from its
1519 * container can destroy that widget. If you want to use @widget
1520 * again, you need to add a reference to it while it's not inside
1521 * a container, using g_object_ref(). If you don't want to use @widget
1522 * again it's usually more efficient to simply destroy it directly
1523 * using gtk_widget_destroy() since this will remove it from the
1524 * container and help break any circular reference count cycles.
1527 gtk_container_remove (GtkContainer *container,
1530 g_return_if_fail (GTK_IS_CONTAINER (container));
1531 g_return_if_fail (GTK_IS_WIDGET (widget));
1532 g_return_if_fail (gtk_widget_get_parent (widget) == GTK_WIDGET (container));
1534 g_signal_emit (container, container_signals[REMOVE], 0, widget);
1538 _gtk_container_dequeue_resize_handler (GtkContainer *container)
1540 g_return_if_fail (GTK_IS_CONTAINER (container));
1541 g_return_if_fail (_gtk_widget_get_resize_pending (GTK_WIDGET (container)));
1543 container_resize_queue = g_slist_remove (container_resize_queue, container);
1544 _gtk_widget_set_resize_pending (GTK_WIDGET (container), FALSE);
1548 * gtk_container_set_resize_mode:
1549 * @container: a #GtkContainer
1550 * @resize_mode: the new resize mode
1552 * Sets the resize mode for the container.
1554 * The resize mode of a container determines whether a resize request
1555 * will be passed to the container's parent, queued for later execution
1556 * or executed immediately.
1559 gtk_container_set_resize_mode (GtkContainer *container,
1560 GtkResizeMode resize_mode)
1562 GtkContainerPrivate *priv;
1564 g_return_if_fail (GTK_IS_CONTAINER (container));
1565 g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
1567 priv = container->priv;
1569 if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
1570 resize_mode == GTK_RESIZE_PARENT)
1572 resize_mode = GTK_RESIZE_QUEUE;
1575 if (priv->resize_mode != resize_mode)
1577 priv->resize_mode = resize_mode;
1579 gtk_widget_queue_resize (GTK_WIDGET (container));
1580 g_object_notify (G_OBJECT (container), "resize-mode");
1585 * gtk_container_get_resize_mode:
1586 * @container: a #GtkContainer
1588 * Returns the resize mode for the container. See
1589 * gtk_container_set_resize_mode ().
1591 * Return value: the current resize mode
1594 gtk_container_get_resize_mode (GtkContainer *container)
1596 g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
1598 return container->priv->resize_mode;
1602 * gtk_container_set_reallocate_redraws:
1603 * @container: a #GtkContainer
1604 * @needs_redraws: the new value for the container's @reallocate_redraws flag
1606 * Sets the @reallocate_redraws flag of the container to the given value.
1608 * Containers requesting reallocation redraws get automatically
1609 * redrawn if any of their children changed allocation.
1612 gtk_container_set_reallocate_redraws (GtkContainer *container,
1613 gboolean needs_redraws)
1615 g_return_if_fail (GTK_IS_CONTAINER (container));
1617 container->priv->reallocate_redraws = needs_redraws ? TRUE : FALSE;
1620 static GtkContainer*
1621 gtk_container_get_resize_container (GtkContainer *container)
1624 GtkWidget *widget = GTK_WIDGET (container);
1626 while ((parent = gtk_widget_get_parent (widget)))
1629 if (GTK_IS_RESIZE_CONTAINER (widget))
1633 return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;
1637 gtk_container_idle_sizer (gpointer data)
1639 /* we may be invoked with a container_resize_queue of NULL, because
1640 * queue_resize could have been adding an extra idle function while
1641 * the queue still got processed. we better just ignore such case
1642 * than trying to explicitely work around them with some extra flags,
1643 * since it doesn't cause any actual harm.
1645 while (container_resize_queue)
1650 slist = container_resize_queue;
1651 container_resize_queue = slist->next;
1652 widget = slist->data;
1653 g_slist_free_1 (slist);
1655 _gtk_widget_set_resize_pending (widget, FALSE);
1656 gtk_container_check_resize (GTK_CONTAINER (widget));
1659 gdk_window_process_all_updates ();
1665 _gtk_container_queue_resize_internal (GtkContainer *container,
1666 gboolean invalidate_only)
1668 GtkContainer *resize_container;
1672 g_return_if_fail (GTK_IS_CONTAINER (container));
1674 widget = GTK_WIDGET (container);
1676 resize_container = gtk_container_get_resize_container (container);
1680 _gtk_widget_set_alloc_needed (widget, TRUE);
1681 _gtk_widget_set_width_request_needed (widget, TRUE);
1682 _gtk_widget_set_height_request_needed (widget, TRUE);
1684 if ((resize_container && widget == GTK_WIDGET (resize_container)) ||
1685 !(parent = gtk_widget_get_parent (widget)))
1691 if (resize_container && !invalidate_only)
1693 if (gtk_widget_get_visible (GTK_WIDGET (resize_container)) &&
1694 (gtk_widget_is_toplevel (GTK_WIDGET (resize_container)) ||
1695 gtk_widget_get_realized (GTK_WIDGET (resize_container))))
1697 switch (resize_container->priv->resize_mode)
1699 case GTK_RESIZE_QUEUE:
1700 if (!_gtk_widget_get_resize_pending (GTK_WIDGET (resize_container)))
1702 _gtk_widget_set_resize_pending (GTK_WIDGET (resize_container), TRUE);
1703 if (container_resize_queue == NULL)
1704 gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
1705 gtk_container_idle_sizer,
1707 container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
1711 case GTK_RESIZE_IMMEDIATE:
1712 gtk_container_check_resize (resize_container);
1715 case GTK_RESIZE_PARENT:
1716 g_assert_not_reached ();
1722 /* we need to let hidden resize containers know that something
1723 * changed while they where hidden (currently only evaluated by
1726 resize_container->priv->need_resize = TRUE;
1732 * _gtk_container_queue_resize:
1733 * @container: a #GtkContainer
1735 * Determines the "resize container" in the hierarchy above this container
1736 * (typically the toplevel, but other containers can be set as resize
1737 * containers with gtk_container_set_resize_mode()), marks the container
1738 * and all parents up to and including the resize container as needing
1739 * to have sizes recompted, and if necessary adds the resize container
1740 * to the queue of containers that will be resized out at idle.
1743 _gtk_container_queue_resize (GtkContainer *container)
1745 _gtk_container_queue_resize_internal (container, FALSE);
1749 * _gtk_container_resize_invalidate:
1750 * @container: a #GtkContainer
1752 * Invalidates cached sizes like _gtk_container_queue_resize() but doesn't
1753 * actually queue the resize container for resize.
1756 _gtk_container_resize_invalidate (GtkContainer *container)
1758 _gtk_container_queue_resize_internal (container, TRUE);
1762 gtk_container_check_resize (GtkContainer *container)
1764 g_return_if_fail (GTK_IS_CONTAINER (container));
1766 g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
1770 gtk_container_real_check_resize (GtkContainer *container)
1772 GtkWidget *widget = GTK_WIDGET (container);
1773 GtkAllocation allocation;
1774 GtkRequisition requisition;
1776 gtk_widget_get_preferred_size (widget,
1777 &requisition, NULL);
1778 gtk_widget_get_allocation (widget, &allocation);
1780 if (requisition.width > allocation.width ||
1781 requisition.height > allocation.height)
1783 if (GTK_IS_RESIZE_CONTAINER (container))
1785 gtk_widget_size_allocate (widget, &allocation);
1786 gtk_widget_set_allocation (widget, &allocation);
1789 gtk_widget_queue_resize (widget);
1793 gtk_container_resize_children (container);
1797 /* The container hasn't changed size but one of its children
1798 * queued a resize request. Which means that the allocation
1799 * is not sufficient for the requisition of some child.
1800 * We've already performed a size request at this point,
1801 * so we simply need to reallocate and let the allocation
1802 * trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
1805 gtk_container_resize_children (GtkContainer *container)
1807 GtkAllocation allocation;
1810 /* resizing invariants:
1811 * toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
1812 * containers that have an idle sizer pending must be flagged with
1815 g_return_if_fail (GTK_IS_CONTAINER (container));
1817 widget = GTK_WIDGET (container);
1818 gtk_widget_get_allocation (widget, &allocation);
1820 gtk_widget_size_allocate (widget, &allocation);
1821 gtk_widget_set_allocation (widget, &allocation);
1825 gtk_container_adjust_size_request (GtkWidget *widget,
1826 GtkOrientation orientation,
1830 GtkContainer *container;
1832 container = GTK_CONTAINER (widget);
1834 if (GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1838 border_width = container->priv->border_width;
1840 *minimum_size += border_width * 2;
1841 *natural_size += border_width * 2;
1844 /* chain up last so gtk_widget_set_size_request() values
1845 * will have a chance to overwrite our border width.
1847 parent_class->adjust_size_request (widget, orientation,
1848 minimum_size, natural_size);
1852 gtk_container_adjust_size_allocation (GtkWidget *widget,
1853 GtkOrientation orientation,
1856 gint *allocated_pos,
1857 gint *allocated_size)
1859 GtkContainer *container;
1862 container = GTK_CONTAINER (widget);
1864 if (!GTK_CONTAINER_GET_CLASS (widget)->_handle_border_width)
1866 parent_class->adjust_size_allocation (widget, orientation,
1867 minimum_size, natural_size, allocated_pos,
1872 border_width = container->priv->border_width;
1874 *allocated_size -= border_width * 2;
1876 /* If we get a pathological too-small allocation to hold
1877 * even the border width, leave all allocation to the actual
1878 * widget, and leave x,y unchanged. (GtkWidget's min size is
1879 * 1x1 if you're wondering why <1 and not <0)
1881 * As long as we have space, set x,y properly.
1884 if (*allocated_size < 1)
1886 *allocated_size += border_width * 2;
1890 *allocated_pos += border_width;
1891 *minimum_size -= border_width * 2;
1892 *natural_size -= border_width * 2;
1895 /* Chain up to GtkWidgetClass *after* removing our border width from
1896 * the proposed allocation size. This is because it's possible that the
1897 * widget was allocated more space than it needs in a said orientation,
1898 * if GtkWidgetClass does any alignments and thus limits the size to the
1899 * natural size... then we need that to be done *after* removing any margins
1900 * and padding values.
1902 parent_class->adjust_size_allocation (widget, orientation,
1903 minimum_size, natural_size, allocated_pos,
1913 count_request_modes (GtkWidget *widget,
1914 RequestModeCount *count)
1916 GtkSizeRequestMode mode = gtk_widget_get_request_mode (widget);
1920 case GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH:
1923 case GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT:
1926 case GTK_SIZE_REQUEST_CONSTANT_SIZE:
1932 static GtkSizeRequestMode
1933 gtk_container_get_request_mode (GtkWidget *widget)
1935 GtkContainer *container = GTK_CONTAINER (widget);
1936 GtkContainerPrivate *priv = container->priv;
1938 /* Recalculate the request mode of the children by majority
1939 * vote whenever the internal content changes */
1940 if (_gtk_widget_get_width_request_needed (widget) ||
1941 _gtk_widget_get_height_request_needed (widget))
1943 RequestModeCount count = { 0, 0 };
1945 gtk_container_forall (container, (GtkCallback)count_request_modes, &count);
1947 if (!count.hfw && !count.wfh)
1948 priv->request_mode = GTK_SIZE_REQUEST_CONSTANT_SIZE;
1950 priv->request_mode = count.wfh > count.hfw ?
1951 GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT :
1952 GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
1955 return priv->request_mode;
1959 * gtk_container_class_handle_border_width:
1960 * @klass: the class struct of a #GtkContainer subclass
1962 * Modifies a subclass of #GtkContainerClass to automatically add and
1963 * remove the border-width setting on GtkContainer. This allows the
1964 * subclass to ignore the border width in its size request and
1965 * allocate methods. The intent is for a subclass to invoke this
1966 * in its class_init function.
1968 * gtk_container_class_handle_border_width() is necessary because it
1969 * would break API too badly to make this behavior the default. So
1970 * subclasses must "opt in" to the parent class handling border_width
1974 gtk_container_class_handle_border_width (GtkContainerClass *klass)
1976 g_return_if_fail (GTK_IS_CONTAINER_CLASS (klass));
1978 klass->_handle_border_width = TRUE;
1982 * gtk_container_forall:
1983 * @container: a #GtkContainer
1984 * @callback: (scope call) (closure callback_data): a callback
1985 * @callback_data: callback user data
1987 * Invokes @callback on each child of @container, including children
1988 * that are considered "internal" (implementation details of the
1989 * container). "Internal" children generally weren't added by the user
1990 * of the container, but were added by the container implementation
1991 * itself. Most applications should use gtk_container_foreach(),
1992 * rather than gtk_container_forall().
1997 gtk_container_forall (GtkContainer *container,
1998 GtkCallback callback,
1999 gpointer callback_data)
2001 GtkContainerClass *class;
2003 g_return_if_fail (GTK_IS_CONTAINER (container));
2004 g_return_if_fail (callback != NULL);
2006 class = GTK_CONTAINER_GET_CLASS (container);
2009 class->forall (container, TRUE, callback, callback_data);
2013 * gtk_container_foreach:
2014 * @container: a #GtkContainer
2015 * @callback: (scope call): a callback
2016 * @callback_data: callback user data
2018 * Invokes @callback on each non-internal child of @container. See
2019 * gtk_container_forall() for details on what constitutes an
2020 * "internal" child. Most applications should use
2021 * gtk_container_foreach(), rather than gtk_container_forall().
2024 gtk_container_foreach (GtkContainer *container,
2025 GtkCallback callback,
2026 gpointer callback_data)
2028 GtkContainerClass *class;
2030 g_return_if_fail (GTK_IS_CONTAINER (container));
2031 g_return_if_fail (callback != NULL);
2033 class = GTK_CONTAINER_GET_CLASS (container);
2036 class->forall (container, FALSE, callback, callback_data);
2040 * gtk_container_set_focus_child:
2041 * @container: a #GtkContainer
2042 * @child: (allow-none): a #GtkWidget, or %NULL
2044 * Sets, or unsets if @child is %NULL, the focused child of @container.
2046 * This function emits the GtkContainer::set_focus_child signal of
2047 * @container. Implementations of #GtkContainer can override the
2048 * default behaviour by overriding the class closure of this signal.
2050 * This is function is mostly meant to be used by widgets. Applications can use
2051 * gtk_widget_grab_focus() to manualy set the focus to a specific widget.
2054 gtk_container_set_focus_child (GtkContainer *container,
2057 g_return_if_fail (GTK_IS_CONTAINER (container));
2059 g_return_if_fail (GTK_IS_WIDGET (child));
2061 g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
2065 * gtk_container_get_focus_child:
2066 * @container: a #GtkContainer
2068 * Returns the current focus child widget inside @container. This is not the
2069 * currently focused widget. That can be obtained by calling
2070 * gtk_window_get_focus().
2072 * Returns: (transfer none): The child widget which will receive the
2073 * focus inside @container when the @conatiner is focussed,
2074 * or %NULL if none is set.
2079 gtk_container_get_focus_child (GtkContainer *container)
2081 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2083 return container->priv->focus_child;
2087 * gtk_container_get_children:
2088 * @container: a #GtkContainer
2090 * Returns the container's non-internal children. See
2091 * gtk_container_forall() for details on what constitutes an "internal" child.
2093 * Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
2096 gtk_container_get_children (GtkContainer *container)
2098 GList *children = NULL;
2100 gtk_container_foreach (container,
2101 gtk_container_children_callback,
2104 return g_list_reverse (children);
2108 gtk_container_child_position_callback (GtkWidget *widget,
2109 gpointer client_data)
2115 } *data = client_data;
2118 if (data->child == widget)
2119 data->index = data->i;
2123 gtk_container_child_default_composite_name (GtkContainer *container,
2133 /* fallback implementation */
2137 gtk_container_forall (container,
2138 gtk_container_child_position_callback,
2141 name = g_strdup_printf ("%s-%u",
2142 g_type_name (G_TYPE_FROM_INSTANCE (child)),
2149 _gtk_container_child_composite_name (GtkContainer *container,
2152 gboolean composite_child;
2154 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
2155 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
2156 g_return_val_if_fail (gtk_widget_get_parent (child) == GTK_WIDGET (container), NULL);
2158 g_object_get (child, "composite-child", &composite_child, NULL);
2159 if (composite_child)
2161 static GQuark quark_composite_name = 0;
2164 if (!quark_composite_name)
2165 quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
2167 name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
2170 GtkContainerClass *class;
2172 class = GTK_CONTAINER_GET_CLASS (container);
2173 if (class->composite_name)
2174 name = class->composite_name (container, child);
2177 name = g_strdup (name);
2188 } ComputeExpandData;
2191 gtk_container_compute_expand_callback (GtkWidget *widget,
2192 gpointer client_data)
2194 ComputeExpandData *data = client_data;
2196 /* note that we don't get_expand on the child if we already know we
2197 * have to expand, so we only recurse into children until we find
2198 * one that expands and then we basically don't do any more
2199 * work. This means that we can leave some children in a
2200 * need_compute_expand state, which is fine, as long as GtkWidget
2201 * doesn't rely on an invariant that "if a child has
2202 * need_compute_expand, its parents also do"
2204 * gtk_widget_compute_expand() always returns FALSE if the
2205 * child is !visible so that's taken care of.
2207 data->hexpand = data->hexpand ||
2208 gtk_widget_compute_expand (widget, GTK_ORIENTATION_HORIZONTAL);
2210 data->vexpand = data->vexpand ||
2211 gtk_widget_compute_expand (widget, GTK_ORIENTATION_VERTICAL);
2215 gtk_container_compute_expand (GtkWidget *widget,
2216 gboolean *hexpand_p,
2217 gboolean *vexpand_p)
2219 ComputeExpandData data;
2221 data.hexpand = FALSE;
2222 data.vexpand = FALSE;
2224 gtk_container_forall (GTK_CONTAINER (widget),
2225 gtk_container_compute_expand_callback,
2228 *hexpand_p = data.hexpand;
2229 *vexpand_p = data.vexpand;
2233 gtk_container_real_set_focus_child (GtkContainer *container,
2236 GtkContainerPrivate *priv;
2238 g_return_if_fail (GTK_IS_CONTAINER (container));
2239 g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
2241 priv = container->priv;
2243 if (child != priv->focus_child)
2245 if (priv->focus_child)
2246 g_object_unref (priv->focus_child);
2247 priv->focus_child = child;
2248 if (priv->focus_child)
2249 g_object_ref (priv->focus_child);
2253 /* check for h/v adjustments
2255 if (priv->focus_child)
2257 GtkAdjustment *hadj;
2258 GtkAdjustment *vadj;
2259 GtkAllocation allocation;
2260 GtkWidget *focus_child;
2263 hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
2264 vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
2268 focus_child = priv->focus_child;
2269 while (GTK_IS_CONTAINER (focus_child) && gtk_container_get_focus_child (GTK_CONTAINER (focus_child)))
2271 focus_child = gtk_container_get_focus_child (GTK_CONTAINER (focus_child));
2274 gtk_widget_translate_coordinates (focus_child, priv->focus_child,
2277 gtk_widget_get_allocation (priv->focus_child, &allocation);
2281 gtk_widget_get_allocation (focus_child, &allocation);
2284 gtk_adjustment_clamp_page (vadj, y, y + allocation.height);
2287 gtk_adjustment_clamp_page (hadj, x, x + allocation.width);
2293 get_focus_chain (GtkContainer *container)
2295 return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
2298 /* same as gtk_container_get_children, except it includes internals
2301 gtk_container_get_all_children (GtkContainer *container)
2303 GList *children = NULL;
2305 gtk_container_forall (container,
2306 gtk_container_children_callback,
2312 static GtkWidgetPath *
2313 gtk_container_real_get_path_for_child (GtkContainer *container,
2316 GtkStyleContext *context;
2317 GtkWidgetPath *path;
2320 context = gtk_widget_get_style_context (GTK_WIDGET (container));
2321 path = gtk_widget_path_copy (gtk_widget_get_path (GTK_WIDGET (container)));
2323 /* Copy any permanent classes to the path */
2324 classes = gtk_style_context_list_classes (context);
2331 classes = classes->next;
2333 gtk_widget_path_iter_add_class (path, -1, cur->data);
2334 g_list_free_1 (cur);
2337 gtk_widget_path_append_for_widget (path, child);
2343 gtk_container_focus (GtkWidget *widget,
2344 GtkDirectionType direction)
2347 GList *sorted_children;
2349 GtkContainer *container;
2350 GtkContainerPrivate *priv;
2352 g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
2354 container = GTK_CONTAINER (widget);
2355 priv = container->priv;
2359 if (gtk_widget_get_can_focus (widget))
2361 if (!gtk_widget_has_focus (widget))
2363 gtk_widget_grab_focus (widget);
2369 /* Get a list of the containers children, allowing focus
2370 * chain to override.
2372 if (priv->has_focus_chain)
2373 children = g_list_copy (get_focus_chain (container));
2375 children = gtk_container_get_all_children (container);
2377 if (priv->has_focus_chain &&
2378 (direction == GTK_DIR_TAB_FORWARD ||
2379 direction == GTK_DIR_TAB_BACKWARD))
2381 sorted_children = g_list_copy (children);
2383 if (direction == GTK_DIR_TAB_BACKWARD)
2384 sorted_children = g_list_reverse (sorted_children);
2387 sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
2389 return_val = gtk_container_focus_move (container, sorted_children, direction);
2391 g_list_free (sorted_children);
2392 g_list_free (children);
2399 tab_compare (gconstpointer a,
2403 GtkAllocation child1_allocation, child2_allocation;
2404 const GtkWidget *child1 = a;
2405 const GtkWidget *child2 = b;
2406 GtkTextDirection text_direction = GPOINTER_TO_INT (data);
2409 gtk_widget_get_allocation ((GtkWidget *) child1, &child1_allocation);
2410 gtk_widget_get_allocation ((GtkWidget *) child2, &child2_allocation);
2412 y1 = child1_allocation.y + child1_allocation.height / 2;
2413 y2 = child2_allocation.y + child2_allocation.height / 2;
2417 gint x1 = child1_allocation.x + child1_allocation.width / 2;
2418 gint x2 = child2_allocation.x + child2_allocation.width / 2;
2420 if (text_direction == GTK_TEXT_DIR_RTL)
2421 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2423 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2426 return (y1 < y2) ? -1 : 1;
2430 gtk_container_focus_sort_tab (GtkContainer *container,
2432 GtkDirectionType direction,
2433 GtkWidget *old_focus)
2435 GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
2436 children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
2438 /* if we are going backwards then reverse the order
2441 if (direction == GTK_DIR_TAB_BACKWARD)
2442 children = g_list_reverse (children);
2447 /* Get coordinates of @widget's allocation with respect to
2448 * allocation of @container.
2451 get_allocation_coords (GtkContainer *container,
2453 GdkRectangle *allocation)
2455 gtk_widget_get_allocation (widget, allocation);
2457 return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
2458 0, 0, &allocation->x, &allocation->y);
2461 /* Look for a child in @children that is intermediate between
2462 * the focus widget and container. This widget, if it exists,
2463 * acts as the starting widget for focus navigation.
2466 find_old_focus (GtkContainer *container,
2469 GList *tmp_list = children;
2472 GtkWidget *child = tmp_list->data;
2473 GtkWidget *widget = child;
2475 while (widget && widget != (GtkWidget *)container)
2479 parent = gtk_widget_get_parent (widget);
2481 if (parent && (gtk_container_get_focus_child (GTK_CONTAINER (parent)) != widget))
2490 tmp_list = tmp_list->next;
2497 old_focus_coords (GtkContainer *container,
2498 GdkRectangle *old_focus_rect)
2500 GtkWidget *widget = GTK_WIDGET (container);
2501 GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
2502 GtkWidget *old_focus;
2504 if (GTK_IS_WINDOW (toplevel))
2506 old_focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
2508 return get_allocation_coords (container, old_focus, old_focus_rect);
2514 typedef struct _CompareInfo CompareInfo;
2518 GtkContainer *container;
2525 up_down_compare (gconstpointer a,
2529 GdkRectangle allocation1;
2530 GdkRectangle allocation2;
2531 CompareInfo *compare = data;
2534 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2535 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2537 y1 = allocation1.y + allocation1.height / 2;
2538 y2 = allocation2.y + allocation2.height / 2;
2542 gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
2543 gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
2545 if (compare->reverse)
2546 return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
2548 return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
2551 return (y1 < y2) ? -1 : 1;
2555 gtk_container_focus_sort_up_down (GtkContainer *container,
2557 GtkDirectionType direction,
2558 GtkWidget *old_focus)
2560 CompareInfo compare;
2562 GdkRectangle old_allocation;
2564 compare.container = container;
2565 compare.reverse = (direction == GTK_DIR_UP);
2568 old_focus = find_old_focus (container, children);
2570 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2576 /* Delete widgets from list that don't match minimum criteria */
2578 compare_x1 = old_allocation.x;
2579 compare_x2 = old_allocation.x + old_allocation.width;
2581 if (direction == GTK_DIR_UP)
2582 compare_y = old_allocation.y;
2584 compare_y = old_allocation.y + old_allocation.height;
2586 tmp_list = children;
2589 GtkWidget *child = tmp_list->data;
2590 GList *next = tmp_list->next;
2591 gint child_x1, child_x2;
2592 GdkRectangle child_allocation;
2594 if (child != old_focus)
2596 if (get_allocation_coords (container, child, &child_allocation))
2598 child_x1 = child_allocation.x;
2599 child_x2 = child_allocation.x + child_allocation.width;
2601 if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
2602 (direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
2603 (direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
2605 children = g_list_delete_link (children, tmp_list);
2609 children = g_list_delete_link (children, tmp_list);
2615 compare.x = (compare_x1 + compare_x2) / 2;
2616 compare.y = old_allocation.y + old_allocation.height / 2;
2620 /* No old focus widget, need to figure out starting x,y some other way
2622 GtkAllocation allocation;
2623 GtkWidget *widget = GTK_WIDGET (container);
2624 GdkRectangle old_focus_rect;
2626 gtk_widget_get_allocation (widget, &allocation);
2628 if (old_focus_coords (container, &old_focus_rect))
2630 compare.x = old_focus_rect.x + old_focus_rect.width / 2;
2634 if (!gtk_widget_get_has_window (widget))
2635 compare.x = allocation.x + allocation.width / 2;
2637 compare.x = allocation.width / 2;
2640 if (!gtk_widget_get_has_window (widget))
2641 compare.y = (direction == GTK_DIR_DOWN) ? allocation.y : allocation.y + allocation.height;
2643 compare.y = (direction == GTK_DIR_DOWN) ? 0 : + allocation.height;
2646 children = g_list_sort_with_data (children, up_down_compare, &compare);
2648 if (compare.reverse)
2649 children = g_list_reverse (children);
2655 left_right_compare (gconstpointer a,
2659 GdkRectangle allocation1;
2660 GdkRectangle allocation2;
2661 CompareInfo *compare = data;
2664 get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
2665 get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
2667 x1 = allocation1.x + allocation1.width / 2;
2668 x2 = allocation2.x + allocation2.width / 2;
2672 gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
2673 gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
2675 if (compare->reverse)
2676 return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
2678 return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
2681 return (x1 < x2) ? -1 : 1;
2685 gtk_container_focus_sort_left_right (GtkContainer *container,
2687 GtkDirectionType direction,
2688 GtkWidget *old_focus)
2690 CompareInfo compare;
2692 GdkRectangle old_allocation;
2694 compare.container = container;
2695 compare.reverse = (direction == GTK_DIR_LEFT);
2698 old_focus = find_old_focus (container, children);
2700 if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
2706 /* Delete widgets from list that don't match minimum criteria */
2708 compare_y1 = old_allocation.y;
2709 compare_y2 = old_allocation.y + old_allocation.height;
2711 if (direction == GTK_DIR_LEFT)
2712 compare_x = old_allocation.x;
2714 compare_x = old_allocation.x + old_allocation.width;
2716 tmp_list = children;
2719 GtkWidget *child = tmp_list->data;
2720 GList *next = tmp_list->next;
2721 gint child_y1, child_y2;
2722 GdkRectangle child_allocation;
2724 if (child != old_focus)
2726 if (get_allocation_coords (container, child, &child_allocation))
2728 child_y1 = child_allocation.y;
2729 child_y2 = child_allocation.y + child_allocation.height;
2731 if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
2732 (direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
2733 (direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
2735 children = g_list_delete_link (children, tmp_list);
2739 children = g_list_delete_link (children, tmp_list);
2745 compare.y = (compare_y1 + compare_y2) / 2;
2746 compare.x = old_allocation.x + old_allocation.width / 2;
2750 /* No old focus widget, need to figure out starting x,y some other way
2752 GtkAllocation allocation;
2753 GtkWidget *widget = GTK_WIDGET (container);
2754 GdkRectangle old_focus_rect;
2756 gtk_widget_get_allocation (widget, &allocation);
2758 if (old_focus_coords (container, &old_focus_rect))
2760 compare.y = old_focus_rect.y + old_focus_rect.height / 2;
2764 if (!gtk_widget_get_has_window (widget))
2765 compare.y = allocation.y + allocation.height / 2;
2767 compare.y = allocation.height / 2;
2770 if (!gtk_widget_get_has_window (widget))
2771 compare.x = (direction == GTK_DIR_RIGHT) ? allocation.x : allocation.x + allocation.width;
2773 compare.x = (direction == GTK_DIR_RIGHT) ? 0 : allocation.width;
2776 children = g_list_sort_with_data (children, left_right_compare, &compare);
2778 if (compare.reverse)
2779 children = g_list_reverse (children);
2785 * gtk_container_focus_sort:
2786 * @container: a #GtkContainer
2787 * @children: a list of descendents of @container (they don't
2788 * have to be direct children)
2789 * @direction: focus direction
2790 * @old_focus: (allow-none): widget to use for the starting position, or %NULL
2791 * to determine this automatically.
2792 * (Note, this argument isn't used for GTK_DIR_TAB_*,
2793 * which is the only @direction we use currently,
2794 * so perhaps this argument should be removed)
2796 * Sorts @children in the correct order for focusing with
2797 * direction type @direction.
2799 * Return value: a copy of @children, sorted in correct focusing order,
2800 * with children that aren't suitable for focusing in this direction
2804 _gtk_container_focus_sort (GtkContainer *container,
2806 GtkDirectionType direction,
2807 GtkWidget *old_focus)
2809 GList *visible_children = NULL;
2813 if (gtk_widget_get_realized (children->data))
2814 visible_children = g_list_prepend (visible_children, children->data);
2815 children = children->next;
2820 case GTK_DIR_TAB_FORWARD:
2821 case GTK_DIR_TAB_BACKWARD:
2822 return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
2825 return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
2828 return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
2831 g_assert_not_reached ();
2837 gtk_container_focus_move (GtkContainer *container,
2839 GtkDirectionType direction)
2841 GtkContainerPrivate *priv = container->priv;
2842 GtkWidget *focus_child;
2845 focus_child = priv->focus_child;
2849 child = children->data;
2850 children = children->next;
2857 if (focus_child == child)
2861 if (gtk_widget_child_focus (child, direction))
2865 else if (gtk_widget_is_drawable (child) &&
2866 gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
2868 if (gtk_widget_child_focus (child, direction))
2878 gtk_container_children_callback (GtkWidget *widget,
2879 gpointer client_data)
2883 children = (GList**) client_data;
2884 *children = g_list_prepend (*children, widget);
2888 chain_widget_destroyed (GtkWidget *widget,
2891 GtkContainer *container;
2894 container = GTK_CONTAINER (user_data);
2896 chain = g_object_get_data (G_OBJECT (container),
2897 "gtk-container-focus-chain");
2899 chain = g_list_remove (chain, widget);
2901 g_signal_handlers_disconnect_by_func (widget,
2902 chain_widget_destroyed,
2905 g_object_set_data (G_OBJECT (container),
2906 I_("gtk-container-focus-chain"),
2911 * gtk_container_set_focus_chain:
2912 * @container: a #GtkContainer
2913 * @focusable_widgets: (transfer none) (element-type GtkWidget):
2914 * the new focus chain
2916 * Sets a focus chain, overriding the one computed automatically by GTK+.
2918 * In principle each widget in the chain should be a descendant of the
2919 * container, but this is not enforced by this method, since it's allowed
2920 * to set the focus chain before you pack the widgets, or have a widget
2921 * in the chain that isn't always packed. The necessary checks are done
2922 * when the focus chain is actually traversed.
2925 gtk_container_set_focus_chain (GtkContainer *container,
2926 GList *focusable_widgets)
2930 GtkContainerPrivate *priv;
2932 g_return_if_fail (GTK_IS_CONTAINER (container));
2934 priv = container->priv;
2936 if (priv->has_focus_chain)
2937 gtk_container_unset_focus_chain (container);
2939 priv->has_focus_chain = TRUE;
2942 tmp_list = focusable_widgets;
2943 while (tmp_list != NULL)
2945 g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
2947 /* In principle each widget in the chain should be a descendant
2948 * of the container, but we don't want to check that here. It's
2949 * expensive and also it's allowed to set the focus chain before
2950 * you pack the widgets, or have a widget in the chain that isn't
2951 * always packed. So we check for ancestor during actual traversal.
2954 chain = g_list_prepend (chain, tmp_list->data);
2956 g_signal_connect (tmp_list->data,
2958 G_CALLBACK (chain_widget_destroyed),
2961 tmp_list = g_list_next (tmp_list);
2964 chain = g_list_reverse (chain);
2966 g_object_set_data (G_OBJECT (container),
2967 I_("gtk-container-focus-chain"),
2972 * gtk_container_get_focus_chain:
2973 * @container: a #GtkContainer
2974 * @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
2975 * to store the focus chain of the
2976 * container, or %NULL. You should free this list
2977 * using g_list_free() when you are done with it, however
2978 * no additional reference count is added to the
2979 * individual widgets in the focus chain.
2981 * Retrieves the focus chain of the container, if one has been
2982 * set explicitly. If no focus chain has been explicitly
2983 * set, GTK+ computes the focus chain based on the positions
2984 * of the children. In that case, GTK+ stores %NULL in
2985 * @focusable_widgets and returns %FALSE.
2987 * Return value: %TRUE if the focus chain of the container
2988 * has been set explicitly.
2991 gtk_container_get_focus_chain (GtkContainer *container,
2992 GList **focus_chain)
2994 GtkContainerPrivate *priv;
2996 g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
2998 priv = container->priv;
3002 if (priv->has_focus_chain)
3003 *focus_chain = g_list_copy (get_focus_chain (container));
3005 *focus_chain = NULL;
3008 return priv->has_focus_chain;
3012 * gtk_container_unset_focus_chain:
3013 * @container: a #GtkContainer
3015 * Removes a focus chain explicitly set with gtk_container_set_focus_chain().
3018 gtk_container_unset_focus_chain (GtkContainer *container)
3020 GtkContainerPrivate *priv;
3022 g_return_if_fail (GTK_IS_CONTAINER (container));
3024 priv = container->priv;
3026 if (priv->has_focus_chain)
3031 chain = get_focus_chain (container);
3033 priv->has_focus_chain = FALSE;
3035 g_object_set_data (G_OBJECT (container),
3036 I_("gtk-container-focus-chain"),
3040 while (tmp_list != NULL)
3042 g_signal_handlers_disconnect_by_func (tmp_list->data,
3043 chain_widget_destroyed,
3046 tmp_list = g_list_next (tmp_list);
3049 g_list_free (chain);
3054 * gtk_container_set_focus_vadjustment:
3055 * @container: a #GtkContainer
3056 * @adjustment: an adjustment which should be adjusted when the focus
3057 * is moved among the descendents of @container
3059 * Hooks up an adjustment to focus handling in a container, so when a
3060 * child of the container is focused, the adjustment is scrolled to
3061 * show that widget. This function sets the vertical alignment. See
3062 * gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
3063 * the adjustment and gtk_container_set_focus_hadjustment() for setting
3064 * the horizontal adjustment.
3066 * The adjustments have to be in pixel units and in the same coordinate
3067 * system as the allocation for immediate children of the container.
3070 gtk_container_set_focus_vadjustment (GtkContainer *container,
3071 GtkAdjustment *adjustment)
3073 g_return_if_fail (GTK_IS_CONTAINER (container));
3075 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3078 g_object_ref (adjustment);
3080 g_object_set_qdata_full (G_OBJECT (container),
3087 * gtk_container_get_focus_vadjustment:
3088 * @container: a #GtkContainer
3090 * Retrieves the vertical focus adjustment for the container. See
3091 * gtk_container_set_focus_vadjustment().
3093 * Return value: (transfer none): the vertical focus adjustment, or %NULL if
3094 * none has been set.
3097 gtk_container_get_focus_vadjustment (GtkContainer *container)
3099 GtkAdjustment *vadjustment;
3101 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3103 vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
3109 * gtk_container_set_focus_hadjustment:
3110 * @container: a #GtkContainer
3111 * @adjustment: an adjustment which should be adjusted when the focus is
3112 * moved among the descendents of @container
3114 * Hooks up an adjustment to focus handling in a container, so when a child
3115 * of the container is focused, the adjustment is scrolled to show that
3116 * widget. This function sets the horizontal alignment.
3117 * See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
3118 * the adjustment and gtk_container_set_focus_vadjustment() for setting
3119 * the vertical adjustment.
3121 * The adjustments have to be in pixel units and in the same coordinate
3122 * system as the allocation for immediate children of the container.
3125 gtk_container_set_focus_hadjustment (GtkContainer *container,
3126 GtkAdjustment *adjustment)
3128 g_return_if_fail (GTK_IS_CONTAINER (container));
3130 g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
3133 g_object_ref (adjustment);
3135 g_object_set_qdata_full (G_OBJECT (container),
3142 * gtk_container_get_focus_hadjustment:
3143 * @container: a #GtkContainer
3145 * Retrieves the horizontal focus adjustment for the container. See
3146 * gtk_container_set_focus_hadjustment ().
3148 * Return value: (transfer none): the horizontal focus adjustment, or %NULL if
3149 * none has been set.
3152 gtk_container_get_focus_hadjustment (GtkContainer *container)
3154 GtkAdjustment *hadjustment;
3156 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3158 hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
3165 gtk_container_show_all (GtkWidget *widget)
3167 g_return_if_fail (GTK_IS_CONTAINER (widget));
3169 gtk_container_foreach (GTK_CONTAINER (widget),
3170 (GtkCallback) gtk_widget_show_all,
3172 gtk_widget_show (widget);
3176 gtk_container_draw_child (GtkWidget *child,
3177 gpointer client_data)
3180 GtkWidget *container;
3182 } *data = client_data;
3184 gtk_container_propagate_draw (GTK_CONTAINER (data->container),
3190 gtk_container_draw (GtkWidget *widget,
3194 GtkWidget *container;
3198 data.container = widget;
3201 gtk_container_forall (GTK_CONTAINER (widget),
3202 gtk_container_draw_child,
3209 gtk_container_map_child (GtkWidget *child,
3210 gpointer client_data)
3212 if (gtk_widget_get_visible (child) &&
3213 gtk_widget_get_child_visible (child) &&
3214 !gtk_widget_get_mapped (child))
3215 gtk_widget_map (child);
3219 gtk_container_map (GtkWidget *widget)
3221 gtk_widget_set_mapped (widget, TRUE);
3223 gtk_container_forall (GTK_CONTAINER (widget),
3224 gtk_container_map_child,
3227 if (gtk_widget_get_has_window (widget))
3228 gdk_window_show (gtk_widget_get_window (widget));
3232 gtk_container_unmap (GtkWidget *widget)
3234 gtk_widget_set_mapped (widget, FALSE);
3236 /* hide our window first so user doesn't see all the child windows
3237 * vanishing one by one. (only matters these days if one of the
3238 * children has an actual native window instead of client-side
3239 * window, e.g. a GtkSocket would)
3241 if (gtk_widget_get_has_window (widget))
3242 gdk_window_hide (gtk_widget_get_window (widget));
3244 gtk_container_forall (GTK_CONTAINER (widget),
3245 (GtkCallback)gtk_widget_unmap,
3250 * gtk_container_propagate_draw:
3251 * @container: a #GtkContainer
3252 * @child: a child of @container
3253 * @cr: Cairo context as passed to the container. If you want to use @cr
3254 * in container's draw function, consider using cairo_save() and
3255 * cairo_restore() before calling this function.
3257 * When a container receives a call to the draw function, it must send
3258 * synthetic #GtkWidget::draw calls to all children that don't have their
3259 * own #GdkWindows. This function provides a convenient way of doing this.
3260 * A container, when it receives a call to its #GtkWidget::draw function,
3261 * calls gtk_container_propagate_draw() once for each child, passing in
3262 * the @cr the container received.
3264 * gtk_container_propagate_draw() takes care of translating the origin of @cr,
3265 * and deciding whether the draw needs to be sent to the child. It is a
3266 * convenient and optimized way of getting the same effect as calling
3267 * gtk_widget_draw() on the child directly.
3269 * In most cases, a container can simply either inherit the
3270 * #GtkWidget::draw implementation from #GtkContainer, or do some drawing
3271 * and then chain to the ::draw implementation from #GtkContainer.
3274 gtk_container_propagate_draw (GtkContainer *container,
3278 GdkEventExpose *event;
3279 GtkAllocation allocation;
3280 GdkWindow *window, *w;
3283 g_return_if_fail (GTK_IS_CONTAINER (container));
3284 g_return_if_fail (GTK_IS_WIDGET (child));
3285 g_return_if_fail (cr != NULL);
3287 g_assert (gtk_widget_get_parent (child) == GTK_WIDGET (container));
3289 event = _gtk_cairo_get_event (cr);
3292 if (gtk_widget_get_has_window (child) ||
3293 gtk_widget_get_window (child) != event->window)
3299 /* translate coordinates. Ugly business, that. */
3300 if (!gtk_widget_get_has_window (GTK_WIDGET (container)))
3302 gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
3312 window = gtk_widget_get_window (GTK_WIDGET (container));
3314 for (w = gtk_widget_get_window (child); w && w != window; w = gdk_window_get_parent (w))
3317 gdk_window_get_position (w, &wx, &wy);
3328 if (!gtk_widget_get_has_window (child))
3330 gtk_widget_get_allocation (child, &allocation);
3335 cairo_translate (cr, x, y);
3337 _gtk_widget_draw_internal (child, cr, TRUE);
3343 _gtk_container_get_need_resize (GtkContainer *container)
3345 return container->priv->need_resize;
3349 _gtk_container_set_need_resize (GtkContainer *container,
3350 gboolean need_resize)
3352 container->priv->need_resize = need_resize;
3356 _gtk_container_get_reallocate_redraws (GtkContainer *container)
3358 return container->priv->reallocate_redraws;
3362 * gtk_container_get_path_for_child:
3363 * @container: a #GtkContainer
3364 * @child: a child of @container
3366 * Returns a newly created widget path representing all the widget hierarchy
3367 * from the toplevel down to and including @child.
3369 * Returns: A newly created #GtkWidgetPath
3372 gtk_container_get_path_for_child (GtkContainer *container,
3375 g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
3376 g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
3377 g_return_val_if_fail (container == (GtkContainer *) gtk_widget_get_parent (child), NULL);
3379 return GTK_CONTAINER_GET_CLASS (container)->get_path_for_child (container, child);