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gtk2/gtk/gtkcontainer.c
Tristan Van Berkom d2c35ec62a Mega commit to change ->get_desired_size() for ->get_desired_width/height(). 
This commit changes gtk_extended_layout_get_desired_size() for
per dimension variants. Furthermore this commit reverts the actions
done in size-groups for now as it needs a different approach.

The natural width/height parameters added to aux_info have been changed
for a per width cache for heights and a per height cache for widths.

gtk-demo is still working, currently sizegroups are not taken
into account as mentioned above - size groups need to be alerted both
when the widths and heights are updated independantly and then that
information needs to repropagate also to other extended layout implementors.
2010-04-12 22:21:46 -04:00

2747 lines
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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "gtkcontainer.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkprivate.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkwindow.h"
#include "gtkintl.h"
#include "gtktoolbar.h"
#include <gobject/gobjectnotifyqueue.c>
#include <gobject/gvaluecollector.h>
#include "gtkalias.h"
enum {
ADD,
REMOVE,
CHECK_RESIZE,
SET_FOCUS_CHILD,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_BORDER_WIDTH,
PROP_RESIZE_MODE,
PROP_CHILD
};
#define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
#define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
/* --- prototypes --- */
static void gtk_container_base_class_init (GtkContainerClass *klass);
static void gtk_container_base_class_finalize (GtkContainerClass *klass);
static void gtk_container_class_init (GtkContainerClass *klass);
static void gtk_container_init (GtkContainer *container);
static void gtk_container_destroy (GtkObject *object);
static void gtk_container_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_container_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_container_add_unimplemented (GtkContainer *container,
GtkWidget *widget);
static void gtk_container_remove_unimplemented (GtkContainer *container,
GtkWidget *widget);
static void gtk_container_real_check_resize (GtkContainer *container);
static gboolean gtk_container_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gtk_container_real_set_focus_child (GtkContainer *container,
GtkWidget *widget);
static gboolean gtk_container_focus_move (GtkContainer *container,
GList *children,
GtkDirectionType direction);
static void gtk_container_children_callback (GtkWidget *widget,
gpointer client_data);
static void gtk_container_show_all (GtkWidget *widget);
static void gtk_container_hide_all (GtkWidget *widget);
static gint gtk_container_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_container_map (GtkWidget *widget);
static void gtk_container_unmap (GtkWidget *widget);
static gchar* gtk_container_child_default_composite_name (GtkContainer *container,
GtkWidget *child);
/* GtkBuildable */
static void gtk_container_buildable_init (GtkBuildableIface *iface);
static void gtk_container_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type);
static gboolean gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data);
static void gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer *data);
/* --- variables --- */
static const gchar vadjustment_key[] = "gtk-vadjustment";
static guint vadjustment_key_id = 0;
static const gchar hadjustment_key[] = "gtk-hadjustment";
static guint hadjustment_key_id = 0;
static GSList *container_resize_queue = NULL;
static guint container_signals[LAST_SIGNAL] = { 0 };
static GtkWidgetClass *parent_class = NULL;
extern GParamSpecPool *_gtk_widget_child_property_pool;
extern GObjectNotifyContext *_gtk_widget_child_property_notify_context;
static GtkBuildableIface *parent_buildable_iface;
/* --- functions --- */
GType
gtk_container_get_type (void)
{
static GType container_type = 0;
if (!container_type)
{
const GTypeInfo container_info =
{
sizeof (GtkContainerClass),
(GBaseInitFunc) gtk_container_base_class_init,
(GBaseFinalizeFunc) gtk_container_base_class_finalize,
(GClassInitFunc) gtk_container_class_init,
NULL /* class_finalize */,
NULL /* class_data */,
sizeof (GtkContainer),
0 /* n_preallocs */,
(GInstanceInitFunc) gtk_container_init,
NULL, /* value_table */
};
const GInterfaceInfo buildable_info =
{
(GInterfaceInitFunc) gtk_container_buildable_init,
NULL,
NULL
};
container_type =
g_type_register_static (GTK_TYPE_WIDGET, I_("GtkContainer"),
&container_info, G_TYPE_FLAG_ABSTRACT);
g_type_add_interface_static (container_type,
GTK_TYPE_BUILDABLE,
&buildable_info);
}
return container_type;
}
static void
gtk_container_base_class_init (GtkContainerClass *class)
{
/* reset instance specifc class fields that don't get inherited */
class->set_child_property = NULL;
class->get_child_property = NULL;
}
static void
gtk_container_base_class_finalize (GtkContainerClass *class)
{
GList *list, *node;
list = g_param_spec_pool_list_owned (_gtk_widget_child_property_pool, G_OBJECT_CLASS_TYPE (class));
for (node = list; node; node = node->next)
{
GParamSpec *pspec = node->data;
g_param_spec_pool_remove (_gtk_widget_child_property_pool, pspec);
PARAM_SPEC_SET_PARAM_ID (pspec, 0);
g_param_spec_unref (pspec);
}
g_list_free (list);
}
static void
gtk_container_class_init (GtkContainerClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
parent_class = g_type_class_peek_parent (class);
vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
gobject_class->set_property = gtk_container_set_property;
gobject_class->get_property = gtk_container_get_property;
object_class->destroy = gtk_container_destroy;
widget_class->show_all = gtk_container_show_all;
widget_class->hide_all = gtk_container_hide_all;
widget_class->expose_event = gtk_container_expose;
widget_class->map = gtk_container_map;
widget_class->unmap = gtk_container_unmap;
widget_class->focus = gtk_container_focus;
class->add = gtk_container_add_unimplemented;
class->remove = gtk_container_remove_unimplemented;
class->check_resize = gtk_container_real_check_resize;
class->forall = NULL;
class->set_focus_child = gtk_container_real_set_focus_child;
class->child_type = NULL;
class->composite_name = gtk_container_child_default_composite_name;
g_object_class_install_property (gobject_class,
PROP_RESIZE_MODE,
g_param_spec_enum ("resize-mode",
P_("Resize mode"),
P_("Specify how resize events are handled"),
GTK_TYPE_RESIZE_MODE,
GTK_RESIZE_PARENT,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_BORDER_WIDTH,
g_param_spec_uint ("border-width",
P_("Border width"),
P_("The width of the empty border outside the containers children"),
0,
65535,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_CHILD,
g_param_spec_object ("child",
P_("Child"),
P_("Can be used to add a new child to the container"),
GTK_TYPE_WIDGET,
GTK_PARAM_WRITABLE));
container_signals[ADD] =
g_signal_new (I_("add"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkContainerClass, add),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
container_signals[REMOVE] =
g_signal_new (I_("remove"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkContainerClass, remove),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
container_signals[CHECK_RESIZE] =
g_signal_new (I_("check-resize"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkContainerClass, check_resize),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
container_signals[SET_FOCUS_CHILD] =
g_signal_new (I_("set-focus-child"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkContainerClass, set_focus_child),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
G_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
}
static void
gtk_container_buildable_init (GtkBuildableIface *iface)
{
parent_buildable_iface = g_type_interface_peek_parent (iface);
iface->add_child = gtk_container_buildable_add_child;
iface->custom_tag_start = gtk_container_buildable_custom_tag_start;
iface->custom_tag_end = gtk_container_buildable_custom_tag_end;
}
static void
gtk_container_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (type)
{
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (buildable, type);
}
else if (GTK_IS_WIDGET (child) && GTK_WIDGET (child)->parent == NULL)
{
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
}
else
g_warning ("Cannot add an object of type %s to a container of type %s",
g_type_name (G_OBJECT_TYPE (child)), g_type_name (G_OBJECT_TYPE (buildable)));
}
static void
gtk_container_buildable_set_child_property (GtkContainer *container,
GtkBuilder *builder,
GtkWidget *child,
gchar *name,
const gchar *value)
{
GParamSpec *pspec;
GValue gvalue = { 0, };
GError *error = NULL;
pspec = gtk_container_class_find_child_property
(G_OBJECT_GET_CLASS (container), name);
if (!pspec)
{
g_warning ("%s does not have a property called %s",
g_type_name (G_OBJECT_TYPE (container)), name);
return;
}
if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error))
{
g_warning ("Could not read property %s:%s with value %s of type %s: %s",
g_type_name (G_OBJECT_TYPE (container)),
name,
value,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
error->message);
g_error_free (error);
return;
}
gtk_container_child_set_property (container, child, name, &gvalue);
g_value_unset (&gvalue);
}
typedef struct {
GtkBuilder *builder;
GtkContainer *container;
GtkWidget *child;
gchar *child_prop_name;
gchar *context;
gboolean translatable;
} PackingPropertiesData;
static void
attributes_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
gpointer user_data,
GError **error)
{
PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
guint i;
if (strcmp (element_name, "property") == 0)
{
for (i = 0; names[i]; i++)
if (strcmp (names[i], "name") == 0)
parser_data->child_prop_name = g_strdup (values[i]);
else if (strcmp (names[i], "translatable") == 0)
{
if (!_gtk_builder_boolean_from_string (values[1],
&parser_data->translatable,
error))
return;
}
else if (strcmp (names[i], "comments") == 0)
; /* for translators */
else if (strcmp (names[i], "context") == 0)
parser_data->context = g_strdup (values[1]);
else
g_warning ("Unsupported attribute for GtkContainer Child "
"property: %s\n", names[i]);
}
else if (strcmp (element_name, "packing") == 0)
return;
else
g_warning ("Unsupported tag for GtkContainer: %s\n", element_name);
}
static void
attributes_text_element (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
PackingPropertiesData *parser_data = (PackingPropertiesData*)user_data;
gchar* value;
if (!parser_data->child_prop_name)
return;
if (parser_data->translatable && text_len)
{
const gchar* domain;
domain = gtk_builder_get_translation_domain (parser_data->builder);
value = _gtk_builder_parser_translate (domain,
parser_data->context,
text);
}
else
{
value = g_strdup (text);
}
gtk_container_buildable_set_child_property (parser_data->container,
parser_data->builder,
parser_data->child,
parser_data->child_prop_name,
value);
g_free (parser_data->child_prop_name);
g_free (parser_data->context);
g_free (value);
parser_data->child_prop_name = NULL;
parser_data->context = NULL;
parser_data->translatable = FALSE;
}
static const GMarkupParser attributes_parser =
{
attributes_start_element,
NULL,
attributes_text_element,
};
static gboolean
gtk_container_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data)
{
PackingPropertiesData *parser_data;
if (parent_buildable_iface->custom_tag_start (buildable, builder, child,
tagname, parser, data))
return TRUE;
if (child && strcmp (tagname, "packing") == 0)
{
parser_data = g_slice_new0 (PackingPropertiesData);
parser_data->builder = builder;
parser_data->container = GTK_CONTAINER (buildable);
parser_data->child = GTK_WIDGET (child);
parser_data->child_prop_name = NULL;
*parser = attributes_parser;
*data = parser_data;
return TRUE;
}
return FALSE;
}
static void
gtk_container_buildable_custom_tag_end (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer *data)
{
if (strcmp (tagname, "packing") == 0)
{
g_slice_free (PackingPropertiesData, (gpointer)data);
return;
}
if (parent_buildable_iface->custom_tag_end)
parent_buildable_iface->custom_tag_end (buildable, builder,
child, tagname, data);
}
/**
* gtk_container_child_type:
* @container: a #GtkContainer
*
* Returns the type of the children supported by the container.
*
* Note that this may return %G_TYPE_NONE to indicate that no more
* children can be added, e.g. for a #GtkPaned which already has two
* children.
*
* Return value: a #GType.
**/
GType
gtk_container_child_type (GtkContainer *container)
{
GType slot;
GtkContainerClass *class;
g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
class = GTK_CONTAINER_GET_CLASS (container);
if (class->child_type)
slot = class->child_type (container);
else
slot = G_TYPE_NONE;
return slot;
}
/* --- GtkContainer child property mechanism --- */
static inline void
container_get_child_property (GtkContainer *container,
GtkWidget *child,
GParamSpec *pspec,
GValue *value)
{
GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
class->get_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
}
static inline void
container_set_child_property (GtkContainer *container,
GtkWidget *child,
GParamSpec *pspec,
const GValue *value,
GObjectNotifyQueue *nqueue)
{
GValue tmp_value = { 0, };
GtkContainerClass *class = g_type_class_peek (pspec->owner_type);
/* provide a copy to work from, convert (if necessary) and validate */
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (!g_value_transform (value, &tmp_value))
g_warning ("unable to set child property `%s' of type `%s' from value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
{
gchar *contents = g_strdup_value_contents (value);
g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
contents,
G_VALUE_TYPE_NAME (value),
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
g_free (contents);
}
else
{
class->set_child_property (container, child, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
g_object_notify_queue_add (G_OBJECT (child), nqueue, pspec);
}
g_value_unset (&tmp_value);
}
/**
* gtk_container_child_get_valist:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @first_property_name: the name of the first property to get
* @var_args: return location for the first property, followed
* optionally by more name/return location pairs, followed by %NULL
*
* Gets the values of one or more child properties for @child and @container.
**/
void
gtk_container_child_get_valist (GtkContainer *container,
GtkWidget *child,
const gchar *first_property_name,
va_list var_args)
{
const gchar *name;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
g_object_ref (container);
g_object_ref (child);
name = first_property_name;
while (name)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error;
pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
name,
G_OBJECT_TYPE (container),
TRUE);
if (!pspec)
{
g_warning ("%s: container class `%s' has no child property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (container),
name);
break;
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_warning ("%s: child property `%s' of container class `%s' is not readable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (container));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
container_get_child_property (container, child, pspec, &value);
G_VALUE_LCOPY (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
g_value_unset (&value);
break;
}
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
g_object_unref (child);
g_object_unref (container);
}
/**
* gtk_container_child_get_property:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @property_name: the name of the property to get
* @value: a location to return the value
*
* Gets the value of a child property for @child and @container.
**/
void
gtk_container_child_get_property (GtkContainer *container,
GtkWidget *child,
const gchar *property_name,
GValue *value)
{
GParamSpec *pspec;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
g_object_ref (container);
g_object_ref (child);
pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
G_OBJECT_TYPE (container), TRUE);
if (!pspec)
g_warning ("%s: container class `%s' has no child property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (container),
property_name);
else if (!(pspec->flags & G_PARAM_READABLE))
g_warning ("%s: child property `%s' of container class `%s' is not readable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (container));
else
{
GValue *prop_value, tmp_value = { 0, };
/* auto-conversion of the callers value type
*/
if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
{
g_value_reset (value);
prop_value = value;
}
else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
{
g_warning ("can't retrieve child property `%s' of type `%s' as value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
g_object_unref (child);
g_object_unref (container);
return;
}
else
{
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
prop_value = &tmp_value;
}
container_get_child_property (container, child, pspec, prop_value);
if (prop_value != value)
{
g_value_transform (prop_value, value);
g_value_unset (&tmp_value);
}
}
g_object_unref (child);
g_object_unref (container);
}
/**
* gtk_container_child_set_valist:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @first_property_name: the name of the first property to set
* @var_args: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Sets one or more child properties for @child and @container.
**/
void
gtk_container_child_set_valist (GtkContainer *container,
GtkWidget *child,
const gchar *first_property_name,
va_list var_args)
{
GObjectNotifyQueue *nqueue;
const gchar *name;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
g_object_ref (container);
g_object_ref (child);
nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
name = first_property_name;
while (name)
{
GValue value = { 0, };
gchar *error = NULL;
GParamSpec *pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
name,
G_OBJECT_TYPE (container),
TRUE);
if (!pspec)
{
g_warning ("%s: container class `%s' has no child property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (container),
name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: child property `%s' of container class `%s' is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (container));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
/* we purposely leak the value here, it might not be
* in a sane state if an error condition occoured
*/
break;
}
container_set_child_property (container, child, pspec, &value, nqueue);
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
g_object_unref (container);
g_object_unref (child);
}
/**
* gtk_container_child_set_property:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @property_name: the name of the property to set
* @value: the value to set the property to
*
* Sets a child property for @child and @container.
**/
void
gtk_container_child_set_property (GtkContainer *container,
GtkWidget *child,
const gchar *property_name,
const GValue *value)
{
GObjectNotifyQueue *nqueue;
GParamSpec *pspec;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
g_object_ref (container);
g_object_ref (child);
nqueue = g_object_notify_queue_freeze (G_OBJECT (child), _gtk_widget_child_property_notify_context);
pspec = g_param_spec_pool_lookup (_gtk_widget_child_property_pool, property_name,
G_OBJECT_TYPE (container), TRUE);
if (!pspec)
g_warning ("%s: container class `%s' has no child property named `%s'",
G_STRLOC,
G_OBJECT_TYPE_NAME (container),
property_name);
else if (!(pspec->flags & G_PARAM_WRITABLE))
g_warning ("%s: child property `%s' of container class `%s' is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (container));
else
{
container_set_child_property (container, child, pspec, value, nqueue);
}
g_object_notify_queue_thaw (G_OBJECT (child), nqueue);
g_object_unref (container);
g_object_unref (child);
}
/**
* gtk_container_add_with_properties:
* @container: a #GtkContainer
* @widget: a widget to be placed inside @container
* @first_prop_name: the name of the first child property to set
* @Varargs: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Adds @widget to @container, setting child properties at the same time.
* See gtk_container_add() and gtk_container_child_set() for more details.
**/
void
gtk_container_add_with_properties (GtkContainer *container,
GtkWidget *widget,
const gchar *first_prop_name,
...)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == NULL);
g_object_ref (container);
g_object_ref (widget);
gtk_widget_freeze_child_notify (widget);
g_signal_emit (container, container_signals[ADD], 0, widget);
if (widget->parent)
{
va_list var_args;
va_start (var_args, first_prop_name);
gtk_container_child_set_valist (container, widget, first_prop_name, var_args);
va_end (var_args);
}
gtk_widget_thaw_child_notify (widget);
g_object_unref (widget);
g_object_unref (container);
}
/**
* gtk_container_child_set:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @first_prop_name: the name of the first property to set
* @Varargs: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Sets one or more child properties for @child and @container.
**/
void
gtk_container_child_set (GtkContainer *container,
GtkWidget *child,
const gchar *first_prop_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
va_start (var_args, first_prop_name);
gtk_container_child_set_valist (container, child, first_prop_name, var_args);
va_end (var_args);
}
/**
* gtk_container_child_get:
* @container: a #GtkContainer
* @child: a widget which is a child of @container
* @first_prop_name: the name of the first property to get
* @Varargs: return location for the first property, followed
* optionally by more name/return location pairs, followed by %NULL
*
* Gets the values of one or more child properties for @child and @container.
**/
void
gtk_container_child_get (GtkContainer *container,
GtkWidget *child,
const gchar *first_prop_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == GTK_WIDGET (container));
va_start (var_args, first_prop_name);
gtk_container_child_get_valist (container, child, first_prop_name, var_args);
va_end (var_args);
}
/**
* gtk_container_class_install_child_property:
* @cclass: a #GtkContainerClass
* @property_id: the id for the property
* @pspec: the #GParamSpec for the property
*
* Installs a child property on a container class.
**/
void
gtk_container_class_install_child_property (GtkContainerClass *cclass,
guint property_id,
GParamSpec *pspec)
{
g_return_if_fail (GTK_IS_CONTAINER_CLASS (cclass));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
if (pspec->flags & G_PARAM_WRITABLE)
g_return_if_fail (cclass->set_child_property != NULL);
if (pspec->flags & G_PARAM_READABLE)
g_return_if_fail (cclass->get_child_property != NULL);
g_return_if_fail (property_id > 0);
g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
if (pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
if (g_param_spec_pool_lookup (_gtk_widget_child_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (cclass), FALSE))
{
g_warning (G_STRLOC ": class `%s' already contains a child property named `%s'",
G_OBJECT_CLASS_NAME (cclass),
pspec->name);
return;
}
g_param_spec_ref (pspec);
g_param_spec_sink (pspec);
PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
g_param_spec_pool_insert (_gtk_widget_child_property_pool, pspec, G_OBJECT_CLASS_TYPE (cclass));
}
/**
* gtk_container_class_find_child_property:
* @cclass: a #GtkContainerClass
* @property_name: the name of the child property to find
* @returns: (allow-none): the #GParamSpec of the child property or %NULL if @class has no
* child property with that name.
*
* Finds a child property of a container class by name.
*/
GParamSpec*
gtk_container_class_find_child_property (GObjectClass *cclass,
const gchar *property_name)
{
g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
return g_param_spec_pool_lookup (_gtk_widget_child_property_pool,
property_name,
G_OBJECT_CLASS_TYPE (cclass),
TRUE);
}
/**
* gtk_container_class_list_child_properties:
* @cclass: a #GtkContainerClass
* @n_properties: location to return the number of child properties found
* @returns: a newly allocated %NULL-terminated array of #GParamSpec*.
* The array must be freed with g_free().
*
* Returns all child properties of a container class.
*/
GParamSpec**
gtk_container_class_list_child_properties (GObjectClass *cclass,
guint *n_properties)
{
GParamSpec **pspecs;
guint n;
g_return_val_if_fail (GTK_IS_CONTAINER_CLASS (cclass), NULL);
pspecs = g_param_spec_pool_list (_gtk_widget_child_property_pool,
G_OBJECT_CLASS_TYPE (cclass),
&n);
if (n_properties)
*n_properties = n;
return pspecs;
}
static void
gtk_container_add_unimplemented (GtkContainer *container,
GtkWidget *widget)
{
g_warning ("GtkContainerClass::add not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
}
static void
gtk_container_remove_unimplemented (GtkContainer *container,
GtkWidget *widget)
{
g_warning ("GtkContainerClass::remove not implemented for `%s'", g_type_name (G_TYPE_FROM_INSTANCE (container)));
}
static void
gtk_container_init (GtkContainer *container)
{
container->focus_child = NULL;
container->border_width = 0;
container->need_resize = FALSE;
container->resize_mode = GTK_RESIZE_PARENT;
container->reallocate_redraws = FALSE;
}
static void
gtk_container_destroy (GtkObject *object)
{
GtkContainer *container = GTK_CONTAINER (object);
if (GTK_CONTAINER_RESIZE_PENDING (container))
_gtk_container_dequeue_resize_handler (container);
/* do this before walking child widgets, to avoid
* removing children from focus chain one by one.
*/
if (container->has_focus_chain)
gtk_container_unset_focus_chain (container);
gtk_container_foreach (container, (GtkCallback) gtk_widget_destroy, NULL);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gtk_container_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkContainer *container = GTK_CONTAINER (object);
switch (prop_id)
{
case PROP_BORDER_WIDTH:
gtk_container_set_border_width (container, g_value_get_uint (value));
break;
case PROP_RESIZE_MODE:
gtk_container_set_resize_mode (container, g_value_get_enum (value));
break;
case PROP_CHILD:
gtk_container_add (container, GTK_WIDGET (g_value_get_object (value)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_container_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkContainer *container = GTK_CONTAINER (object);
switch (prop_id)
{
case PROP_BORDER_WIDTH:
g_value_set_uint (value, container->border_width);
break;
case PROP_RESIZE_MODE:
g_value_set_enum (value, container->resize_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_container_set_border_width:
* @container: a #GtkContainer
* @border_width: amount of blank space to leave <emphasis>outside</emphasis>
* the container. Valid values are in the range 0-65535 pixels.
*
* Sets the border width of the container.
*
* The border width of a container is the amount of space to leave
* around the outside of the container. The only exception to this is
* #GtkWindow; because toplevel windows can't leave space outside,
* they leave the space inside. The border is added on all sides of
* the container. To add space to only one side, one approach is to
* create a #GtkAlignment widget, call gtk_widget_set_size_request()
* to give it a size, and place it on the side of the container as
* a spacer.
**/
void
gtk_container_set_border_width (GtkContainer *container,
guint border_width)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (container->border_width != border_width)
{
container->border_width = border_width;
g_object_notify (G_OBJECT (container), "border-width");
if (gtk_widget_get_realized (GTK_WIDGET (container)))
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
/**
* gtk_container_get_border_width:
* @container: a #GtkContainer
*
* Retrieves the border width of the container. See
* gtk_container_set_border_width().
*
* Return value: the current border width
**/
guint
gtk_container_get_border_width (GtkContainer *container)
{
g_return_val_if_fail (GTK_IS_CONTAINER (container), 0);
return container->border_width;
}
/**
* gtk_container_add:
* @container: a #GtkContainer
* @widget: a widget to be placed inside @container
*
* Adds @widget to @container. Typically used for simple containers
* such as #GtkWindow, #GtkFrame, or #GtkButton; for more complicated
* layout containers such as #GtkBox or #GtkTable, this function will
* pick default packing parameters that may not be correct. So
* consider functions such as gtk_box_pack_start() and
* gtk_table_attach() as an alternative to gtk_container_add() in
* those cases. A widget may be added to only one container at a time;
* you can't place the same widget inside two different containers.
**/
void
gtk_container_add (GtkContainer *container,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (widget));
if (widget->parent != NULL)
{
g_warning ("Attempting to add a widget with type %s to a container of "
"type %s, but the widget is already inside a container of type %s, "
"the GTK+ FAQ at http://library.gnome.org/devel/gtk-faq/stable/ "
"explains how to reparent a widget.",
g_type_name (G_OBJECT_TYPE (widget)),
g_type_name (G_OBJECT_TYPE (container)),
g_type_name (G_OBJECT_TYPE (widget->parent)));
return;
}
g_signal_emit (container, container_signals[ADD], 0, widget);
}
/**
* gtk_container_remove:
* @container: a #GtkContainer
* @widget: a current child of @container
*
* Removes @widget from @container. @widget must be inside @container.
* Note that @container will own a reference to @widget, and that this
* may be the last reference held; so removing a widget from its
* container can destroy that widget. If you want to use @widget
* again, you need to add a reference to it while it's not inside
* a container, using g_object_ref(). If you don't want to use @widget
* again it's usually more efficient to simply destroy it directly
* using gtk_widget_destroy() since this will remove it from the
* container and help break any circular reference count cycles.
**/
void
gtk_container_remove (GtkContainer *container,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (widget));
/* When using the deprecated API of the toolbar, it is possible
* to legitimately call this function with a widget that is not
* a direct child of the container.
*/
g_return_if_fail (GTK_IS_TOOLBAR (container) ||
widget->parent == GTK_WIDGET (container));
g_signal_emit (container, container_signals[REMOVE], 0, widget);
}
void
_gtk_container_dequeue_resize_handler (GtkContainer *container)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_CONTAINER_RESIZE_PENDING (container));
container_resize_queue = g_slist_remove (container_resize_queue, container);
GTK_PRIVATE_UNSET_FLAG (container, GTK_RESIZE_PENDING);
}
/**
* gtk_container_set_resize_mode:
* @container: a #GtkContainer
* @resize_mode: the new resize mode
*
* Sets the resize mode for the container.
*
* The resize mode of a container determines whether a resize request
* will be passed to the container's parent, queued for later execution
* or executed immediately.
**/
void
gtk_container_set_resize_mode (GtkContainer *container,
GtkResizeMode resize_mode)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
if (gtk_widget_is_toplevel (GTK_WIDGET (container)) &&
resize_mode == GTK_RESIZE_PARENT)
{
resize_mode = GTK_RESIZE_QUEUE;
}
if (container->resize_mode != resize_mode)
{
container->resize_mode = resize_mode;
gtk_widget_queue_resize (GTK_WIDGET (container));
g_object_notify (G_OBJECT (container), "resize-mode");
}
}
/**
* gtk_container_get_resize_mode:
* @container: a #GtkContainer
*
* Returns the resize mode for the container. See
* gtk_container_set_resize_mode ().
*
* Return value: the current resize mode
**/
GtkResizeMode
gtk_container_get_resize_mode (GtkContainer *container)
{
g_return_val_if_fail (GTK_IS_CONTAINER (container), GTK_RESIZE_PARENT);
return container->resize_mode;
}
/**
* gtk_container_set_reallocate_redraws:
* @container: a #GtkContainer
* @needs_redraws: the new value for the container's @reallocate_redraws flag
*
* Sets the @reallocate_redraws flag of the container to the given value.
*
* Containers requesting reallocation redraws get automatically
* redrawn if any of their children changed allocation.
**/
void
gtk_container_set_reallocate_redraws (GtkContainer *container,
gboolean needs_redraws)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
container->reallocate_redraws = needs_redraws ? TRUE : FALSE;
}
static GtkContainer*
gtk_container_get_resize_container (GtkContainer *container)
{
GtkWidget *widget = GTK_WIDGET (container);
while (widget->parent)
{
widget = widget->parent;
if (GTK_IS_RESIZE_CONTAINER (widget))
break;
}
return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;
}
static gboolean
gtk_container_idle_sizer (gpointer data)
{
/* we may be invoked with a container_resize_queue of NULL, because
* queue_resize could have been adding an extra idle function while
* the queue still got processed. we better just ignore such case
* than trying to explicitely work around them with some extra flags,
* since it doesn't cause any actual harm.
*/
while (container_resize_queue)
{
GSList *slist;
GtkWidget *widget;
slist = container_resize_queue;
container_resize_queue = slist->next;
widget = slist->data;
g_slist_free_1 (slist);
GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_PENDING);
gtk_container_check_resize (GTK_CONTAINER (widget));
}
gdk_window_process_all_updates ();
return FALSE;
}
void
_gtk_container_queue_resize (GtkContainer *container)
{
GtkContainer *resize_container;
GtkWidget *widget;
g_return_if_fail (GTK_IS_CONTAINER (container));
widget = GTK_WIDGET (container);
resize_container = gtk_container_get_resize_container (container);
while (TRUE)
{
GTK_PRIVATE_SET_FLAG (widget, GTK_ALLOC_NEEDED);
GTK_PRIVATE_SET_FLAG (widget, GTK_REQUEST_NEEDED);
GTK_PRIVATE_SET_FLAG (widget, GTK_WIDTH_REQUEST_NEEDED);
GTK_PRIVATE_SET_FLAG (widget, GTK_HEIGHT_REQUEST_NEEDED);
if ((resize_container && widget == GTK_WIDGET (resize_container)) ||
!widget->parent)
break;
widget = widget->parent;
}
if (resize_container)
{
if (gtk_widget_get_visible (GTK_WIDGET (resize_container)) &&
(gtk_widget_is_toplevel (GTK_WIDGET (resize_container)) ||
gtk_widget_get_realized (GTK_WIDGET (resize_container))))
{
switch (resize_container->resize_mode)
{
case GTK_RESIZE_QUEUE:
if (!GTK_CONTAINER_RESIZE_PENDING (resize_container))
{
GTK_PRIVATE_SET_FLAG (resize_container, GTK_RESIZE_PENDING);
if (container_resize_queue == NULL)
gdk_threads_add_idle_full (GTK_PRIORITY_RESIZE,
gtk_container_idle_sizer,
NULL, NULL);
container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
}
break;
case GTK_RESIZE_IMMEDIATE:
gtk_container_check_resize (resize_container);
break;
case GTK_RESIZE_PARENT:
g_assert_not_reached ();
break;
}
}
else
{
/* we need to let hidden resize containers know that something
* changed while they where hidden (currently only evaluated by
* toplevels).
*/
resize_container->need_resize = TRUE;
}
}
}
void
gtk_container_check_resize (GtkContainer *container)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_signal_emit (container, container_signals[CHECK_RESIZE], 0);
}
static void
gtk_container_real_check_resize (GtkContainer *container)
{
GtkWidget *widget = GTK_WIDGET (container);
GtkRequisition requisition;
gtk_widget_size_request (widget, &requisition);
if (requisition.width > widget->allocation.width ||
requisition.height > widget->allocation.height)
{
if (GTK_IS_RESIZE_CONTAINER (container))
gtk_widget_size_allocate (GTK_WIDGET (container),
&GTK_WIDGET (container)->allocation);
else
gtk_widget_queue_resize (widget);
}
else
{
gtk_container_resize_children (container);
}
}
/* The container hasn't changed size but one of its children
* queued a resize request. Which means that the allocation
* is not sufficient for the requisition of some child.
* We've already performed a size request at this point,
* so we simply need to reallocate and let the allocation
* trickle down via GTK_WIDGET_ALLOC_NEEDED flags.
*/
void
gtk_container_resize_children (GtkContainer *container)
{
GtkWidget *widget;
/* resizing invariants:
* toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
* containers that have an idle sizer pending must be flagged with
* RESIZE_PENDING.
*/
g_return_if_fail (GTK_IS_CONTAINER (container));
widget = GTK_WIDGET (container);
gtk_widget_size_allocate (widget, &widget->allocation);
}
/**
* gtk_container_forall:
* @container: a #GtkContainer
* @callback: a callback
* @callback_data: callback user data
*
* Invokes @callback on each child of @container, including children
* that are considered "internal" (implementation details of the
* container). "Internal" children generally weren't added by the user
* of the container, but were added by the container implementation
* itself. Most applications should use gtk_container_foreach(),
* rather than gtk_container_forall().
**/
void
gtk_container_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkContainerClass *class;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (callback != NULL);
class = GTK_CONTAINER_GET_CLASS (container);
if (class->forall)
class->forall (container, TRUE, callback, callback_data);
}
/**
* gtk_container_foreach:
* @container: a #GtkContainer
* @callback: a callback
* @callback_data: callback user data
*
* Invokes @callback on each non-internal child of @container. See
* gtk_container_forall() for details on what constitutes an
* "internal" child. Most applications should use
* gtk_container_foreach(), rather than gtk_container_forall().
**/
void
gtk_container_foreach (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkContainerClass *class;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (callback != NULL);
class = GTK_CONTAINER_GET_CLASS (container);
if (class->forall)
class->forall (container, FALSE, callback, callback_data);
}
typedef struct _GtkForeachData GtkForeachData;
struct _GtkForeachData
{
GtkObject *container;
GtkCallbackMarshal callback;
gpointer callback_data;
};
static void
gtk_container_foreach_unmarshal (GtkWidget *child,
gpointer data)
{
GtkForeachData *fdata = (GtkForeachData*) data;
GtkArg args[2];
/* first argument */
args[0].name = NULL;
args[0].type = G_TYPE_FROM_INSTANCE (child);
GTK_VALUE_OBJECT (args[0]) = GTK_OBJECT (child);
/* location for return value */
args[1].name = NULL;
args[1].type = G_TYPE_NONE;
fdata->callback (fdata->container, fdata->callback_data, 1, args);
}
void
gtk_container_foreach_full (GtkContainer *container,
GtkCallback callback,
GtkCallbackMarshal marshal,
gpointer callback_data,
GDestroyNotify notify)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (marshal)
{
GtkForeachData fdata;
fdata.container = GTK_OBJECT (container);
fdata.callback = marshal;
fdata.callback_data = callback_data;
gtk_container_foreach (container, gtk_container_foreach_unmarshal, &fdata);
}
else
{
g_return_if_fail (callback != NULL);
gtk_container_foreach (container, callback, &callback_data);
}
if (notify)
notify (callback_data);
}
/**
* gtk_container_set_focus_child:
* @container: a #GtkContainer
* @child: (allow-none): a #GtkWidget, or %NULL
*
* Sets, or unsets if @child is %NULL, the focused child of @container.
*
* This function emits the GtkContainer::set_focus_child signal of
* @container. Implementations of #GtkContainer can override the
* default behaviour by overriding the class closure of this signal.
*/
void
gtk_container_set_focus_child (GtkContainer *container,
GtkWidget *child)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (child)
g_return_if_fail (GTK_IS_WIDGET (child));
g_signal_emit (container, container_signals[SET_FOCUS_CHILD], 0, child);
}
/**
* gtk_container_get_focus_child:
* @container: a #GtkContainer
*
* Returns the current focus child widget inside @container.
*
* Returns: The child widget which has the focus
* inside @container, or %NULL if none is set.
*
* Since: 2.14
**/
GtkWidget *
gtk_container_get_focus_child (GtkContainer *container)
{
g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
return container->focus_child;
}
/**
* gtk_container_get_children:
* @container: a #GtkContainer
*
* Returns the container's non-internal children. See
* gtk_container_forall() for details on what constitutes an "internal" child.
*
* Return value: (element-type GtkWidget) (transfer container): a newly-allocated list of the container's non-internal children.
**/
GList*
gtk_container_get_children (GtkContainer *container)
{
GList *children = NULL;
gtk_container_foreach (container,
gtk_container_children_callback,
&children);
return g_list_reverse (children);
}
static void
gtk_container_child_position_callback (GtkWidget *widget,
gpointer client_data)
{
struct {
GtkWidget *child;
guint i;
guint index;
} *data = client_data;
data->i++;
if (data->child == widget)
data->index = data->i;
}
static gchar*
gtk_container_child_default_composite_name (GtkContainer *container,
GtkWidget *child)
{
struct {
GtkWidget *child;
guint i;
guint index;
} data;
gchar *name;
/* fallback implementation */
data.child = child;
data.i = 0;
data.index = 0;
gtk_container_forall (container,
gtk_container_child_position_callback,
&data);
name = g_strdup_printf ("%s-%u",
g_type_name (G_TYPE_FROM_INSTANCE (child)),
data.index);
return name;
}
gchar*
_gtk_container_child_composite_name (GtkContainer *container,
GtkWidget *child)
{
gboolean composite_child;
g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
g_return_val_if_fail (child->parent == GTK_WIDGET (container), NULL);
g_object_get (child, "composite-child", &composite_child, NULL);
if (composite_child)
{
static GQuark quark_composite_name = 0;
gchar *name;
if (!quark_composite_name)
quark_composite_name = g_quark_from_static_string ("gtk-composite-name");
name = g_object_get_qdata (G_OBJECT (child), quark_composite_name);
if (!name)
{
GtkContainerClass *class;
class = GTK_CONTAINER_GET_CLASS (container);
if (class->composite_name)
name = class->composite_name (container, child);
}
else
name = g_strdup (name);
return name;
}
return NULL;
}
static void
gtk_container_real_set_focus_child (GtkContainer *container,
GtkWidget *child)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
if (child != container->focus_child)
{
if (container->focus_child)
g_object_unref (container->focus_child);
container->focus_child = child;
if (container->focus_child)
g_object_ref (container->focus_child);
}
/* check for h/v adjustments
*/
if (container->focus_child)
{
GtkAdjustment *hadj;
GtkAdjustment *vadj;
GtkWidget *focus_child;
gint x, y;
hadj = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
vadj = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
if (hadj || vadj)
{
focus_child = container->focus_child;
while (GTK_IS_CONTAINER (focus_child) &&
GTK_CONTAINER (focus_child)->focus_child)
{
focus_child = GTK_CONTAINER (focus_child)->focus_child;
}
gtk_widget_translate_coordinates (focus_child, container->focus_child,
0, 0, &x, &y);
x += container->focus_child->allocation.x;
y += container->focus_child->allocation.y;
if (vadj)
gtk_adjustment_clamp_page (vadj, y, y + focus_child->allocation.height);
if (hadj)
gtk_adjustment_clamp_page (hadj, x, x + focus_child->allocation.width);
}
}
}
static GList*
get_focus_chain (GtkContainer *container)
{
return g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
}
/* same as gtk_container_get_children, except it includes internals
*/
static GList *
gtk_container_get_all_children (GtkContainer *container)
{
GList *children = NULL;
gtk_container_forall (container,
gtk_container_children_callback,
&children);
return children;
}
static gboolean
gtk_container_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GList *children;
GList *sorted_children;
gint return_val;
GtkContainer *container;
g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
container = GTK_CONTAINER (widget);
return_val = FALSE;
if (gtk_widget_get_can_focus (widget))
{
if (!gtk_widget_has_focus (widget))
{
gtk_widget_grab_focus (widget);
return_val = TRUE;
}
}
else
{
/* Get a list of the containers children, allowing focus
* chain to override.
*/
if (container->has_focus_chain)
children = g_list_copy (get_focus_chain (container));
else
children = gtk_container_get_all_children (container);
if (container->has_focus_chain &&
(direction == GTK_DIR_TAB_FORWARD ||
direction == GTK_DIR_TAB_BACKWARD))
{
sorted_children = g_list_copy (children);
if (direction == GTK_DIR_TAB_BACKWARD)
sorted_children = g_list_reverse (sorted_children);
}
else
sorted_children = _gtk_container_focus_sort (container, children, direction, NULL);
return_val = gtk_container_focus_move (container, sorted_children, direction);
g_list_free (sorted_children);
g_list_free (children);
}
return return_val;
}
static gint
tab_compare (gconstpointer a,
gconstpointer b,
gpointer data)
{
const GtkWidget *child1 = a;
const GtkWidget *child2 = b;
GtkTextDirection text_direction = GPOINTER_TO_INT (data);
gint y1 = child1->allocation.y + child1->allocation.height / 2;
gint y2 = child2->allocation.y + child2->allocation.height / 2;
if (y1 == y2)
{
gint x1 = child1->allocation.x + child1->allocation.width / 2;
gint x2 = child2->allocation.x + child2->allocation.width / 2;
if (text_direction == GTK_TEXT_DIR_RTL)
return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
else
return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
}
else
return (y1 < y2) ? -1 : 1;
}
static GList *
gtk_container_focus_sort_tab (GtkContainer *container,
GList *children,
GtkDirectionType direction,
GtkWidget *old_focus)
{
GtkTextDirection text_direction = gtk_widget_get_direction (GTK_WIDGET (container));
children = g_list_sort_with_data (children, tab_compare, GINT_TO_POINTER (text_direction));
/* if we are going backwards then reverse the order
* of the children.
*/
if (direction == GTK_DIR_TAB_BACKWARD)
children = g_list_reverse (children);
return children;
}
/* Get coordinates of @widget's allocation with respect to
* allocation of @container.
*/
static gboolean
get_allocation_coords (GtkContainer *container,
GtkWidget *widget,
GdkRectangle *allocation)
{
*allocation = widget->allocation;
return gtk_widget_translate_coordinates (widget, GTK_WIDGET (container),
0, 0, &allocation->x, &allocation->y);
}
/* Look for a child in @children that is intermediate between
* the focus widget and container. This widget, if it exists,
* acts as the starting widget for focus navigation.
*/
static GtkWidget *
find_old_focus (GtkContainer *container,
GList *children)
{
GList *tmp_list = children;
while (tmp_list)
{
GtkWidget *child = tmp_list->data;
GtkWidget *widget = child;
while (widget && widget != (GtkWidget *)container)
{
GtkWidget *parent = widget->parent;
if (parent && ((GtkContainer *)parent)->focus_child != widget)
goto next;
widget = parent;
}
return child;
next:
tmp_list = tmp_list->next;
}
return NULL;
}
static gboolean
old_focus_coords (GtkContainer *container,
GdkRectangle *old_focus_rect)
{
GtkWidget *widget = GTK_WIDGET (container);
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
if (GTK_IS_WINDOW (toplevel) && GTK_WINDOW (toplevel)->focus_widget)
{
GtkWidget *old_focus = GTK_WINDOW (toplevel)->focus_widget;
return get_allocation_coords (container, old_focus, old_focus_rect);
}
else
return FALSE;
}
typedef struct _CompareInfo CompareInfo;
struct _CompareInfo
{
GtkContainer *container;
gint x;
gint y;
gboolean reverse;
};
static gint
up_down_compare (gconstpointer a,
gconstpointer b,
gpointer data)
{
GdkRectangle allocation1;
GdkRectangle allocation2;
CompareInfo *compare = data;
gint y1, y2;
get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
y1 = allocation1.y + allocation1.height / 2;
y2 = allocation2.y + allocation2.height / 2;
if (y1 == y2)
{
gint x1 = abs (allocation1.x + allocation1.width / 2 - compare->x);
gint x2 = abs (allocation2.x + allocation2.width / 2 - compare->x);
if (compare->reverse)
return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
else
return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
}
else
return (y1 < y2) ? -1 : 1;
}
static GList *
gtk_container_focus_sort_up_down (GtkContainer *container,
GList *children,
GtkDirectionType direction,
GtkWidget *old_focus)
{
CompareInfo compare;
GList *tmp_list;
GdkRectangle old_allocation;
compare.container = container;
compare.reverse = (direction == GTK_DIR_UP);
if (!old_focus)
old_focus = find_old_focus (container, children);
if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
{
gint compare_x1;
gint compare_x2;
gint compare_y;
/* Delete widgets from list that don't match minimum criteria */
compare_x1 = old_allocation.x;
compare_x2 = old_allocation.x + old_allocation.width;
if (direction == GTK_DIR_UP)
compare_y = old_allocation.y;
else
compare_y = old_allocation.y + old_allocation.height;
tmp_list = children;
while (tmp_list)
{
GtkWidget *child = tmp_list->data;
GList *next = tmp_list->next;
gint child_x1, child_x2;
GdkRectangle child_allocation;
if (child != old_focus)
{
if (get_allocation_coords (container, child, &child_allocation))
{
child_x1 = child_allocation.x;
child_x2 = child_allocation.x + child_allocation.width;
if ((child_x2 <= compare_x1 || child_x1 >= compare_x2) /* No horizontal overlap */ ||
(direction == GTK_DIR_DOWN && child_allocation.y + child_allocation.height < compare_y) || /* Not below */
(direction == GTK_DIR_UP && child_allocation.y > compare_y)) /* Not above */
{
children = g_list_delete_link (children, tmp_list);
}
}
else
children = g_list_delete_link (children, tmp_list);
}
tmp_list = next;
}
compare.x = (compare_x1 + compare_x2) / 2;
compare.y = old_allocation.y + old_allocation.height / 2;
}
else
{
/* No old focus widget, need to figure out starting x,y some other way
*/
GtkWidget *widget = GTK_WIDGET (container);
GdkRectangle old_focus_rect;
if (old_focus_coords (container, &old_focus_rect))
{
compare.x = old_focus_rect.x + old_focus_rect.width / 2;
}
else
{
if (!gtk_widget_get_has_window (widget))
compare.x = widget->allocation.x + widget->allocation.width / 2;
else
compare.x = widget->allocation.width / 2;
}
if (!gtk_widget_get_has_window (widget))
compare.y = (direction == GTK_DIR_DOWN) ? widget->allocation.y : widget->allocation.y + widget->allocation.height;
else
compare.y = (direction == GTK_DIR_DOWN) ? 0 : + widget->allocation.height;
}
children = g_list_sort_with_data (children, up_down_compare, &compare);
if (compare.reverse)
children = g_list_reverse (children);
return children;
}
static gint
left_right_compare (gconstpointer a,
gconstpointer b,
gpointer data)
{
GdkRectangle allocation1;
GdkRectangle allocation2;
CompareInfo *compare = data;
gint x1, x2;
get_allocation_coords (compare->container, (GtkWidget *)a, &allocation1);
get_allocation_coords (compare->container, (GtkWidget *)b, &allocation2);
x1 = allocation1.x + allocation1.width / 2;
x2 = allocation2.x + allocation2.width / 2;
if (x1 == x2)
{
gint y1 = abs (allocation1.y + allocation1.height / 2 - compare->y);
gint y2 = abs (allocation2.y + allocation2.height / 2 - compare->y);
if (compare->reverse)
return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
else
return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
}
else
return (x1 < x2) ? -1 : 1;
}
static GList *
gtk_container_focus_sort_left_right (GtkContainer *container,
GList *children,
GtkDirectionType direction,
GtkWidget *old_focus)
{
CompareInfo compare;
GList *tmp_list;
GdkRectangle old_allocation;
compare.container = container;
compare.reverse = (direction == GTK_DIR_LEFT);
if (!old_focus)
old_focus = find_old_focus (container, children);
if (old_focus && get_allocation_coords (container, old_focus, &old_allocation))
{
gint compare_y1;
gint compare_y2;
gint compare_x;
/* Delete widgets from list that don't match minimum criteria */
compare_y1 = old_allocation.y;
compare_y2 = old_allocation.y + old_allocation.height;
if (direction == GTK_DIR_LEFT)
compare_x = old_allocation.x;
else
compare_x = old_allocation.x + old_allocation.width;
tmp_list = children;
while (tmp_list)
{
GtkWidget *child = tmp_list->data;
GList *next = tmp_list->next;
gint child_y1, child_y2;
GdkRectangle child_allocation;
if (child != old_focus)
{
if (get_allocation_coords (container, child, &child_allocation))
{
child_y1 = child_allocation.y;
child_y2 = child_allocation.y + child_allocation.height;
if ((child_y2 <= compare_y1 || child_y1 >= compare_y2) /* No vertical overlap */ ||
(direction == GTK_DIR_RIGHT && child_allocation.x + child_allocation.width < compare_x) || /* Not to left */
(direction == GTK_DIR_LEFT && child_allocation.x > compare_x)) /* Not to right */
{
children = g_list_delete_link (children, tmp_list);
}
}
else
children = g_list_delete_link (children, tmp_list);
}
tmp_list = next;
}
compare.y = (compare_y1 + compare_y2) / 2;
compare.x = old_allocation.x + old_allocation.width / 2;
}
else
{
/* No old focus widget, need to figure out starting x,y some other way
*/
GtkWidget *widget = GTK_WIDGET (container);
GdkRectangle old_focus_rect;
if (old_focus_coords (container, &old_focus_rect))
{
compare.y = old_focus_rect.y + old_focus_rect.height / 2;
}
else
{
if (!gtk_widget_get_has_window (widget))
compare.y = widget->allocation.y + widget->allocation.height / 2;
else
compare.y = widget->allocation.height / 2;
}
if (!gtk_widget_get_has_window (widget))
compare.x = (direction == GTK_DIR_RIGHT) ? widget->allocation.x : widget->allocation.x + widget->allocation.width;
else
compare.x = (direction == GTK_DIR_RIGHT) ? 0 : widget->allocation.width;
}
children = g_list_sort_with_data (children, left_right_compare, &compare);
if (compare.reverse)
children = g_list_reverse (children);
return children;
}
/**
* gtk_container_focus_sort:
* @container: a #GtkContainer
* @children: a list of descendents of @container (they don't
* have to be direct children)
* @direction: focus direction
* @old_focus: (allow-none): widget to use for the starting position, or %NULL
* to determine this automatically.
* (Note, this argument isn't used for GTK_DIR_TAB_*,
* which is the only @direction we use currently,
* so perhaps this argument should be removed)
*
* Sorts @children in the correct order for focusing with
* direction type @direction.
*
* Return value: a copy of @children, sorted in correct focusing order,
* with children that aren't suitable for focusing in this direction
* removed.
**/
GList *
_gtk_container_focus_sort (GtkContainer *container,
GList *children,
GtkDirectionType direction,
GtkWidget *old_focus)
{
GList *visible_children = NULL;
while (children)
{
if (gtk_widget_get_realized (children->data))
visible_children = g_list_prepend (visible_children, children->data);
children = children->next;
}
switch (direction)
{
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_TAB_BACKWARD:
return gtk_container_focus_sort_tab (container, visible_children, direction, old_focus);
case GTK_DIR_UP:
case GTK_DIR_DOWN:
return gtk_container_focus_sort_up_down (container, visible_children, direction, old_focus);
case GTK_DIR_LEFT:
case GTK_DIR_RIGHT:
return gtk_container_focus_sort_left_right (container, visible_children, direction, old_focus);
}
g_assert_not_reached ();
return NULL;
}
static gboolean
gtk_container_focus_move (GtkContainer *container,
GList *children,
GtkDirectionType direction)
{
GtkWidget *focus_child;
GtkWidget *child;
focus_child = container->focus_child;
while (children)
{
child = children->data;
children = children->next;
if (!child)
continue;
if (focus_child)
{
if (focus_child == child)
{
focus_child = NULL;
if (gtk_widget_child_focus (child, direction))
return TRUE;
}
}
else if (gtk_widget_is_drawable (child) &&
gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
{
if (gtk_widget_child_focus (child, direction))
return TRUE;
}
}
return FALSE;
}
static void
gtk_container_children_callback (GtkWidget *widget,
gpointer client_data)
{
GList **children;
children = (GList**) client_data;
*children = g_list_prepend (*children, widget);
}
static void
chain_widget_destroyed (GtkWidget *widget,
gpointer user_data)
{
GtkContainer *container;
GList *chain;
container = GTK_CONTAINER (user_data);
chain = g_object_get_data (G_OBJECT (container),
"gtk-container-focus-chain");
chain = g_list_remove (chain, widget);
g_signal_handlers_disconnect_by_func (widget,
chain_widget_destroyed,
user_data);
g_object_set_data (G_OBJECT (container),
I_("gtk-container-focus-chain"),
chain);
}
/**
* gtk_container_set_focus_chain:
* @container: a #GtkContainer
* @focusable_widgets: the new focus chain
*
* Sets a focus chain, overriding the one computed automatically by GTK+.
*
* In principle each widget in the chain should be a descendant of the
* container, but this is not enforced by this method, since it's allowed
* to set the focus chain before you pack the widgets, or have a widget
* in the chain that isn't always packed. The necessary checks are done
* when the focus chain is actually traversed.
**/
void
gtk_container_set_focus_chain (GtkContainer *container,
GList *focusable_widgets)
{
GList *chain;
GList *tmp_list;
g_return_if_fail (GTK_IS_CONTAINER (container));
if (container->has_focus_chain)
gtk_container_unset_focus_chain (container);
container->has_focus_chain = TRUE;
chain = NULL;
tmp_list = focusable_widgets;
while (tmp_list != NULL)
{
g_return_if_fail (GTK_IS_WIDGET (tmp_list->data));
/* In principle each widget in the chain should be a descendant
* of the container, but we don't want to check that here, it's
* expensive and also it's allowed to set the focus chain before
* you pack the widgets, or have a widget in the chain that isn't
* always packed. So we check for ancestor during actual traversal.
*/
chain = g_list_prepend (chain, tmp_list->data);
g_signal_connect (tmp_list->data,
"destroy",
G_CALLBACK (chain_widget_destroyed),
container);
tmp_list = g_list_next (tmp_list);
}
chain = g_list_reverse (chain);
g_object_set_data (G_OBJECT (container),
I_("gtk-container-focus-chain"),
chain);
}
/**
* gtk_container_get_focus_chain:
* @container: a #GtkContainer
* @focusable_widgets: (element-type GtkWidget) (out) (transfer container): location
* to store the focus chain of the
* container, or %NULL. You should free this list
* using g_list_free() when you are done with it, however
* no additional reference count is added to the
* individual widgets in the focus chain.
*
* Retrieves the focus chain of the container, if one has been
* set explicitly. If no focus chain has been explicitly
* set, GTK+ computes the focus chain based on the positions
* of the children. In that case, GTK+ stores %NULL in
* @focusable_widgets and returns %FALSE.
*
* Return value: %TRUE if the focus chain of the container
* has been set explicitly.
**/
gboolean
gtk_container_get_focus_chain (GtkContainer *container,
GList **focus_chain)
{
g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
if (focus_chain)
{
if (container->has_focus_chain)
*focus_chain = g_list_copy (get_focus_chain (container));
else
*focus_chain = NULL;
}
return container->has_focus_chain;
}
/**
* gtk_container_unset_focus_chain:
* @container: a #GtkContainer
*
* Removes a focus chain explicitly set with gtk_container_set_focus_chain().
**/
void
gtk_container_unset_focus_chain (GtkContainer *container)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (container->has_focus_chain)
{
GList *chain;
GList *tmp_list;
chain = get_focus_chain (container);
container->has_focus_chain = FALSE;
g_object_set_data (G_OBJECT (container),
I_("gtk-container-focus-chain"),
NULL);
tmp_list = chain;
while (tmp_list != NULL)
{
g_signal_handlers_disconnect_by_func (tmp_list->data,
chain_widget_destroyed,
container);
tmp_list = g_list_next (tmp_list);
}
g_list_free (chain);
}
}
/**
* gtk_container_set_focus_vadjustment:
* @container: a #GtkContainer
* @adjustment: an adjustment which should be adjusted when the focus
* is moved among the descendents of @container
*
* Hooks up an adjustment to focus handling in a container, so when a
* child of the container is focused, the adjustment is scrolled to
* show that widget. This function sets the vertical alignment. See
* gtk_scrolled_window_get_vadjustment() for a typical way of obtaining
* the adjustment and gtk_container_set_focus_hadjustment() for setting
* the horizontal adjustment.
*
* The adjustments have to be in pixel units and in the same coordinate
* system as the allocation for immediate children of the container.
*/
void
gtk_container_set_focus_vadjustment (GtkContainer *container,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (adjustment)
g_object_ref (adjustment);
g_object_set_qdata_full (G_OBJECT (container),
vadjustment_key_id,
adjustment,
g_object_unref);
}
/**
* gtk_container_get_focus_vadjustment:
* @container: a #GtkContainer
*
* Retrieves the vertical focus adjustment for the container. See
* gtk_container_set_focus_vadjustment().
*
* Return value: (transfer none): the vertical focus adjustment, or %NULL if
* none has been set.
**/
GtkAdjustment *
gtk_container_get_focus_vadjustment (GtkContainer *container)
{
GtkAdjustment *vadjustment;
g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
vadjustment = g_object_get_qdata (G_OBJECT (container), vadjustment_key_id);
return vadjustment;
}
/**
* gtk_container_set_focus_hadjustment:
* @container: a #GtkContainer
* @adjustment: an adjustment which should be adjusted when the focus is
* moved among the descendents of @container
*
* Hooks up an adjustment to focus handling in a container, so when a child
* of the container is focused, the adjustment is scrolled to show that
* widget. This function sets the horizontal alignment.
* See gtk_scrolled_window_get_hadjustment() for a typical way of obtaining
* the adjustment and gtk_container_set_focus_vadjustment() for setting
* the vertical adjustment.
*
* The adjustments have to be in pixel units and in the same coordinate
* system as the allocation for immediate children of the container.
*/
void
gtk_container_set_focus_hadjustment (GtkContainer *container,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (adjustment)
g_object_ref (adjustment);
g_object_set_qdata_full (G_OBJECT (container),
hadjustment_key_id,
adjustment,
g_object_unref);
}
/**
* gtk_container_get_focus_hadjustment:
* @container: a #GtkContainer
*
* Retrieves the horizontal focus adjustment for the container. See
* gtk_container_set_focus_hadjustment ().
*
* Return value: (transfer none): the horizontal focus adjustment, or %NULL if
* none has been set.
**/
GtkAdjustment *
gtk_container_get_focus_hadjustment (GtkContainer *container)
{
GtkAdjustment *hadjustment;
g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
hadjustment = g_object_get_qdata (G_OBJECT (container), hadjustment_key_id);
return hadjustment;
}
static void
gtk_container_show_all (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_CONTAINER (widget));
gtk_container_foreach (GTK_CONTAINER (widget),
(GtkCallback) gtk_widget_show_all,
NULL);
gtk_widget_show (widget);
}
static void
gtk_container_hide_all (GtkWidget *widget)
{
g_return_if_fail (GTK_IS_CONTAINER (widget));
gtk_widget_hide (widget);
gtk_container_foreach (GTK_CONTAINER (widget),
(GtkCallback) gtk_widget_hide_all,
NULL);
}
static void
gtk_container_expose_child (GtkWidget *child,
gpointer client_data)
{
struct {
GtkWidget *container;
GdkEventExpose *event;
} *data = client_data;
gtk_container_propagate_expose (GTK_CONTAINER (data->container),
child,
data->event);
}
static gint
gtk_container_expose (GtkWidget *widget,
GdkEventExpose *event)
{
struct {
GtkWidget *container;
GdkEventExpose *event;
} data;
g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (gtk_widget_is_drawable (widget))
{
data.container = widget;
data.event = event;
gtk_container_forall (GTK_CONTAINER (widget),
gtk_container_expose_child,
&data);
}
return FALSE;
}
static void
gtk_container_map_child (GtkWidget *child,
gpointer client_data)
{
if (gtk_widget_get_visible (child) &&
GTK_WIDGET_CHILD_VISIBLE (child) &&
!gtk_widget_get_mapped (child))
gtk_widget_map (child);
}
static void
gtk_container_map (GtkWidget *widget)
{
gtk_widget_set_mapped (widget, TRUE);
gtk_container_forall (GTK_CONTAINER (widget),
gtk_container_map_child,
NULL);
if (gtk_widget_get_has_window (widget))
gdk_window_show (widget->window);
}
static void
gtk_container_unmap (GtkWidget *widget)
{
gtk_widget_set_mapped (widget, FALSE);
if (gtk_widget_get_has_window (widget))
gdk_window_hide (widget->window);
else
gtk_container_forall (GTK_CONTAINER (widget),
(GtkCallback)gtk_widget_unmap,
NULL);
}
/**
* gtk_container_propagate_expose:
* @container: a #GtkContainer
* @child: a child of @container
* @event: a expose event sent to container
*
* When a container receives an expose event, it must send synthetic
* expose events to all children that don't have their own #GdkWindows.
* This function provides a convenient way of doing this. A container,
* when it receives an expose event, calls gtk_container_propagate_expose()
* once for each child, passing in the event the container received.
*
* gtk_container_propagate_expose() takes care of deciding whether
* an expose event needs to be sent to the child, intersecting
* the event's area with the child area, and sending the event.
*
* In most cases, a container can simply either simply inherit the
* #GtkWidget::expose implementation from #GtkContainer, or, do some drawing
* and then chain to the ::expose implementation from #GtkContainer.
**/
void
gtk_container_propagate_expose (GtkContainer *container,
GtkWidget *child,
GdkEventExpose *event)
{
GdkEvent *child_event;
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (event != NULL);
g_assert (child->parent == GTK_WIDGET (container));
if (gtk_widget_is_drawable (child) &&
!gtk_widget_get_has_window (child) &&
(child->window == event->window))
{
child_event = gdk_event_new (GDK_EXPOSE);
child_event->expose = *event;
g_object_ref (child_event->expose.window);
child_event->expose.region = gtk_widget_region_intersect (child, event->region);
if (!gdk_region_empty (child_event->expose.region))
{
gdk_region_get_clipbox (child_event->expose.region, &child_event->expose.area);
gtk_widget_send_expose (child, child_event);
}
gdk_event_free (child_event);
}
}
#define __GTK_CONTAINER_C__
#include "gtkaliasdef.c"
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