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gtk2/gtk/gtkcontainer.c
Havoc Pennington 23b98cc1ec Add ability to override the focus chain for a container explicitly 
2001-03-22  Havoc Pennington  <hp@redhat.com>

	* gtk/gtkcontainer.c (gtk_container_set_focus_chain):
	(gtk_container_unset_focus_chain): Add ability to override the
	focus chain for a container explicitly
2001-03-22 20:59:37 +00:00

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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 <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "gtkcontainer.h"
#include "gtkprivate.h"
#include "gtksignal.h"
#include "gtkmain.h"
#include "gtkwindow.h"
enum {
ADD,
REMOVE,
CHECK_RESIZE,
FOCUS,
SET_FOCUS_CHILD,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_BORDER_WIDTH,
ARG_RESIZE_MODE,
ARG_CHILD,
ARG_REALLOCATE_REDRAWS
};
typedef struct _GtkChildArgInfo GtkChildArgInfo;
struct _GtkChildArgInfo
{
gchar *name;
GtkType type;
GtkType class_type;
guint arg_flags;
guint arg_id;
guint seq_id;
};
static void gtk_container_base_class_init (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_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_container_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
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_real_focus (GtkContainer *container,
GtkDirectionType direction);
static void gtk_container_real_set_focus_child (GtkContainer *container,
GtkWidget *widget);
static gboolean gtk_container_focus_tab (GtkContainer *container,
GList *children,
GtkDirectionType direction);
static gboolean gtk_container_focus_up_down (GtkContainer *container,
GList **children,
GtkDirectionType direction);
static gboolean gtk_container_focus_left_right (GtkContainer *container,
GList **children,
GtkDirectionType direction);
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 gchar* gtk_container_child_default_composite_name (GtkContainer *container,
GtkWidget *child);
static guint container_signals[LAST_SIGNAL] = { 0 };
static GHashTable *container_child_arg_info_ht = NULL;
static GtkWidgetClass *parent_class = NULL;
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;
GtkType
gtk_container_get_type (void)
{
static GtkType container_type = 0;
if (!container_type)
{
static const GtkTypeInfo container_info =
{
"GtkContainer",
sizeof (GtkContainer),
sizeof (GtkContainerClass),
(GtkClassInitFunc) gtk_container_class_init,
(GtkObjectInitFunc) gtk_container_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) gtk_container_base_class_init,
};
container_type = gtk_type_unique (gtk_widget_get_type (), &container_info);
}
return container_type;
}
static void
gtk_container_base_class_init (GtkContainerClass *class)
{
/* reset instance specifc class fields that don't get inherited */
class->n_child_args = 0;
class->set_child_arg = NULL;
class->get_child_arg = NULL;
}
static void
gtk_container_class_init (GtkContainerClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = gtk_type_class (gtk_widget_get_type ());
container_child_arg_info_ht = g_hash_table_new (gtk_arg_info_hash,
gtk_arg_info_equal);
vadjustment_key_id = g_quark_from_static_string (vadjustment_key);
hadjustment_key_id = g_quark_from_static_string (hadjustment_key);
object_class->get_arg = gtk_container_get_arg;
object_class->set_arg = gtk_container_set_arg;
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;
class->add = gtk_container_add_unimplemented;
class->remove = gtk_container_remove_unimplemented;
class->check_resize = gtk_container_real_check_resize;
class->forall = NULL;
class->focus = gtk_container_real_focus;
class->set_focus_child = gtk_container_real_set_focus_child;
class->child_type = NULL;
class->composite_name = gtk_container_child_default_composite_name;
gtk_object_add_arg_type ("GtkContainer::border_width", GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_BORDER_WIDTH);
gtk_object_add_arg_type ("GtkContainer::resize_mode", GTK_TYPE_RESIZE_MODE, GTK_ARG_READWRITE, ARG_RESIZE_MODE);
gtk_object_add_arg_type ("GtkContainer::child", GTK_TYPE_WIDGET, GTK_ARG_WRITABLE, ARG_CHILD);
gtk_object_add_arg_type ("GtkContainer::reallocate_redraws", GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_REALLOCATE_REDRAWS);
container_signals[ADD] =
gtk_signal_new ("add",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkContainerClass, add),
gtk_marshal_VOID__OBJECT,
GTK_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
container_signals[REMOVE] =
gtk_signal_new ("remove",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkContainerClass, remove),
gtk_marshal_VOID__OBJECT,
GTK_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
container_signals[CHECK_RESIZE] =
gtk_signal_new ("check_resize",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkContainerClass, check_resize),
gtk_marshal_VOID__VOID,
GTK_TYPE_NONE, 0);
container_signals[FOCUS] =
gtk_signal_new ("focus",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkContainerClass, focus),
gtk_marshal_ENUM__ENUM,
GTK_TYPE_DIRECTION_TYPE, 1,
GTK_TYPE_DIRECTION_TYPE);
container_signals[SET_FOCUS_CHILD] =
gtk_signal_new ("set-focus-child",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkContainerClass, set_focus_child),
gtk_marshal_VOID__OBJECT,
GTK_TYPE_NONE, 1,
GTK_TYPE_WIDGET);
}
GtkType
gtk_container_child_type (GtkContainer *container)
{
GtkType slot;
GtkContainerClass *class;
g_return_val_if_fail (container != NULL, 0);
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 = GTK_TYPE_NONE;
return slot;
}
/****************************************************
* GtkContainer child argument mechanism
*
****************************************************/
void
gtk_container_add_with_args (GtkContainer *container,
GtkWidget *widget,
const gchar *first_arg_name,
...)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == NULL);
gtk_widget_ref (GTK_WIDGET (container));
gtk_widget_ref (widget);
gtk_signal_emit (GTK_OBJECT (container), container_signals[ADD], widget);
if (widget->parent)
{
va_list var_args;
GSList *arg_list = NULL;
GSList *info_list = NULL;
gchar *error;
va_start (var_args, first_arg_name);
error = gtk_container_child_args_collect (GTK_OBJECT_TYPE (container),
&arg_list,
&info_list,
first_arg_name,
var_args);
va_end (var_args);
if (error)
{
g_warning ("gtk_container_add_with_args(): %s", error);
g_free (error);
}
else
{
GSList *slist_arg;
GSList *slist_info;
slist_arg = arg_list;
slist_info = info_list;
while (slist_arg)
{
gtk_container_arg_set (container, widget, slist_arg->data, slist_info->data);
slist_arg = slist_arg->next;
slist_info = slist_info->next;
}
gtk_args_collect_cleanup (arg_list, info_list);
}
}
gtk_widget_unref (widget);
gtk_widget_unref (GTK_WIDGET (container));
}
void
gtk_container_addv (GtkContainer *container,
GtkWidget *widget,
guint n_args,
GtkArg *args)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == NULL);
gtk_widget_ref (GTK_WIDGET (container));
gtk_widget_ref (widget);
gtk_signal_emit (GTK_OBJECT (container), container_signals[ADD], widget);
if (widget->parent)
{
GtkArg *max_args;
for (max_args = args + n_args; args < max_args; args++)
gtk_container_arg_set (container, widget, args, NULL);
}
gtk_widget_unref (widget);
gtk_widget_unref (GTK_WIDGET (container));
}
void
gtk_container_child_setv (GtkContainer *container,
GtkWidget *child,
guint n_args,
GtkArg *args)
{
GtkArg *max_args;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent != NULL);
if (n_args)
g_return_if_fail (args != NULL);
for (max_args = args + n_args; args < max_args; args++)
gtk_container_arg_set (container, child, args, NULL);
}
void
gtk_container_child_getv (GtkContainer *container,
GtkWidget *child,
guint n_args,
GtkArg *args)
{
GtkArg *max_args;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent != NULL);
if (n_args)
g_return_if_fail (args != NULL);
for (max_args = args + n_args; args < max_args; args++)
gtk_container_arg_get (container, child, args, NULL);
}
void
gtk_container_child_set (GtkContainer *container,
GtkWidget *child,
const gchar *first_arg_name,
...)
{
va_list var_args;
GSList *arg_list = NULL;
GSList *info_list = NULL;
gchar *error;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent != NULL);
va_start (var_args, first_arg_name);
error = gtk_container_child_args_collect (GTK_OBJECT_TYPE (container),
&arg_list,
&info_list,
first_arg_name,
var_args);
va_end (var_args);
if (error)
{
g_warning ("gtk_container_child_set(): %s", error);
g_free (error);
}
else
{
GSList *slist_arg;
GSList *slist_info;
slist_arg = arg_list;
slist_info = info_list;
while (slist_arg)
{
gtk_container_arg_set (container, child, slist_arg->data, slist_info->data);
slist_arg = slist_arg->next;
slist_info = slist_info->next;
}
gtk_args_collect_cleanup (arg_list, info_list);
}
}
void
gtk_container_arg_set (GtkContainer *container,
GtkWidget *child,
GtkArg *arg,
GtkArgInfo *info)
{
GtkContainerClass *class;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (arg != NULL);
if (!info)
{
gchar *error;
error = gtk_arg_get_info (GTK_OBJECT_TYPE (container),
container_child_arg_info_ht,
arg->name,
&info);
if (error)
{
g_warning ("gtk_container_arg_set(): %s", error);
g_free (error);
return;
}
}
g_return_if_fail (info->arg_flags & GTK_ARG_CHILD_ARG);
if (! (info->arg_flags & GTK_ARG_WRITABLE))
{
g_warning ("gtk_container_arg_set(): argument \"%s\" is not writable",
info->full_name);
return;
}
if (info->type != arg->type)
{
g_warning ("gtk_container_arg_set(): argument \"%s\" has invalid type `%s'",
info->full_name,
gtk_type_name (arg->type));
return;
}
class = gtk_type_class (info->class_type);
g_assert (class->set_child_arg != NULL);
class->set_child_arg (container, child, arg, info->arg_id);
}
void
gtk_container_arg_get (GtkContainer *container,
GtkWidget *child,
GtkArg *arg,
GtkArgInfo *info)
{
GtkContainerClass *class;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (arg != NULL);
if (!info)
{
gchar *error;
error = gtk_arg_get_info (GTK_OBJECT_TYPE (container),
container_child_arg_info_ht,
arg->name,
&info);
if (error)
{
g_warning ("gtk_container_arg_get(): %s", error);
g_free (error);
arg->type = GTK_TYPE_INVALID;
return;
}
}
g_return_if_fail (info->arg_flags & GTK_ARG_CHILD_ARG);
if (! (info->arg_flags & GTK_ARG_READABLE))
{
g_warning ("gtk_container_arg_get(): argument \"%s\" is not readable",
info->full_name);
arg->type = GTK_TYPE_INVALID;
return;
}
class = gtk_type_class (info->class_type);
g_assert (class->get_child_arg != NULL);
arg->type = info->type;
class->get_child_arg (container, child, arg, info->arg_id);
}
void
gtk_container_add_child_arg_type (const gchar *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id)
{
g_return_if_fail (arg_name != NULL);
g_return_if_fail (arg_type > GTK_TYPE_NONE);
g_return_if_fail (arg_id > 0);
g_return_if_fail ((arg_flags & GTK_ARG_READWRITE) == GTK_ARG_READWRITE);
/* g_return_if_fail ((arg_flags & GTK_ARG_CHILD_ARG) != 0); */
arg_flags |= GTK_ARG_CHILD_ARG;
arg_flags &= GTK_ARG_MASK;
gtk_arg_type_new_static (GTK_TYPE_CONTAINER,
arg_name,
GTK_STRUCT_OFFSET (GtkContainerClass, n_child_args),
container_child_arg_info_ht,
arg_type,
arg_flags,
arg_id);
}
gchar*
gtk_container_child_args_collect (GtkType object_type,
GSList **arg_list_p,
GSList **info_list_p,
const gchar *first_arg_name,
va_list var_args)
{
return gtk_args_collect (object_type,
container_child_arg_info_ht,
arg_list_p,
info_list_p,
first_arg_name,
var_args);
}
gchar*
gtk_container_child_arg_get_info (GtkType object_type,
const gchar *arg_name,
GtkArgInfo **info_p)
{
return gtk_arg_get_info (object_type,
container_child_arg_info_ht,
arg_name,
info_p);
}
GtkArg*
gtk_container_query_child_args (GtkType class_type,
guint32 **arg_flags,
guint *n_args)
{
g_return_val_if_fail (n_args != NULL, NULL);
*n_args = 0;
g_return_val_if_fail (gtk_type_is_a (class_type, GTK_TYPE_CONTAINER), NULL);
return gtk_args_query (class_type, container_child_arg_info_ht, arg_flags, n_args);
}
static void
gtk_container_add_unimplemented (GtkContainer *container,
GtkWidget *widget)
{
g_warning ("GtkContainerClass::add not implemented for `%s'", gtk_type_name (GTK_OBJECT_TYPE (container)));
}
static void
gtk_container_remove_unimplemented (GtkContainer *container,
GtkWidget *widget)
{
g_warning ("GtkContainerClass::remove not implemented for `%s'", gtk_type_name (GTK_OBJECT_TYPE (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;
container->resize_widgets = NULL;
}
static void
gtk_container_destroy (GtkObject *object)
{
GtkContainer *container;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_CONTAINER (object));
container = GTK_CONTAINER (object);
if (GTK_CONTAINER_RESIZE_PENDING (container))
gtk_container_dequeue_resize_handler (container);
if (container->resize_widgets)
gtk_container_clear_resize_widgets (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);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gtk_container_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkContainer *container;
container = GTK_CONTAINER (object);
switch (arg_id)
{
case ARG_BORDER_WIDTH:
gtk_container_set_border_width (container, GTK_VALUE_UINT (*arg));
break;
case ARG_RESIZE_MODE:
gtk_container_set_resize_mode (container, GTK_VALUE_ENUM (*arg));
break;
case ARG_REALLOCATE_REDRAWS:
gtk_container_set_reallocate_redraws (container, GTK_VALUE_BOOL (*arg));
break;
case ARG_CHILD:
gtk_container_add (container, GTK_WIDGET (GTK_VALUE_OBJECT (*arg)));
break;
default:
break;
}
}
static void
gtk_container_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkContainer *container;
container = GTK_CONTAINER (object);
switch (arg_id)
{
case ARG_BORDER_WIDTH:
GTK_VALUE_UINT (*arg) = container->border_width;
break;
case ARG_RESIZE_MODE:
GTK_VALUE_ENUM (*arg) = container->resize_mode;
break;
case ARG_REALLOCATE_REDRAWS:
GTK_VALUE_BOOL (*arg) = container->reallocate_redraws;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/**
* gtk_container_set_border_width:
* @container: a #GtkContainer
* @border_width: amount of blank space to leave <emphasis>outside</emphasis> 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_usize() 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 (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
if (container->border_width != border_width)
{
container->border_width = border_width;
if (GTK_WIDGET_REALIZED (container))
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
/**
* 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 (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (widget != NULL);
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",
g_type_name (G_OBJECT_TYPE (widget)),
g_type_name (G_OBJECT_TYPE (container)),
g_type_name (G_OBJECT_TYPE (widget->parent)));
return;
}
gtk_signal_emit (GTK_OBJECT (container), container_signals[ADD], 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().
**/
void
gtk_container_remove (GtkContainer *container,
GtkWidget *widget)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (widget->parent == GTK_WIDGET (container));
gtk_signal_emit (GTK_OBJECT (container), container_signals[REMOVE], 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);
}
void
gtk_container_clear_resize_widgets (GtkContainer *container)
{
GSList *node;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
node = container->resize_widgets;
while (node)
{
GtkWidget *widget = node->data;
GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_NEEDED);
node = node->next;
}
g_slist_free (container->resize_widgets);
container->resize_widgets = NULL;
}
void
gtk_container_set_resize_mode (GtkContainer *container,
GtkResizeMode resize_mode)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
g_return_if_fail (resize_mode <= GTK_RESIZE_IMMEDIATE);
if (GTK_WIDGET_TOPLEVEL (container) &&
resize_mode == GTK_RESIZE_PARENT)
resize_mode = GTK_RESIZE_QUEUE;
if (container->resize_mode != resize_mode)
{
container->resize_mode = resize_mode;
if (resize_mode == GTK_RESIZE_IMMEDIATE)
gtk_container_check_resize (container);
else
{
gtk_container_clear_resize_widgets (container);
gtk_widget_queue_resize (GTK_WIDGET (container));
}
}
}
void
gtk_container_set_reallocate_redraws (GtkContainer *container,
gboolean needs_redraws)
{
g_return_if_fail (GTK_IS_CONTAINER (container));
needs_redraws = needs_redraws ? TRUE : FALSE;
if (needs_redraws != container->reallocate_redraws)
{
container->reallocate_redraws = needs_redraws;
if (container->reallocate_redraws)
gtk_widget_queue_draw (GTK_WIDGET (container));
}
}
static GtkContainer*
gtk_container_get_resize_container (GtkContainer *container)
{
GtkWidget *widget;
widget = GTK_WIDGET (container);
while (widget->parent)
{
widget = widget->parent;
if (GTK_IS_RESIZE_CONTAINER (widget) && !GTK_WIDGET_RESIZE_NEEDED (widget))
break;
}
return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;
}
static gboolean
gtk_container_idle_sizer (gpointer data)
{
GDK_THREADS_ENTER ();
/* 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 ();
GDK_THREADS_LEAVE ();
return FALSE;
}
void
gtk_container_queue_resize (GtkContainer *container)
{
GtkContainer *resize_container;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
/* clear resize widgets for resize containers
* before aborting prematurely. this is especially
* important for toplevels which may need imemdiate
* processing or their resize handler to be queued.
*/
if (GTK_IS_RESIZE_CONTAINER (container))
gtk_container_clear_resize_widgets (container);
if (GTK_OBJECT_DESTROYED (container) ||
GTK_WIDGET_RESIZE_NEEDED (container))
return;
resize_container = gtk_container_get_resize_container (container);
if (resize_container)
{
if (GTK_WIDGET_VISIBLE (resize_container) &&
(GTK_WIDGET_TOPLEVEL (resize_container) || GTK_WIDGET_DRAWABLE (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)
gtk_idle_add_priority (GTK_PRIORITY_RESIZE,
gtk_container_idle_sizer,
NULL);
container_resize_queue = g_slist_prepend (container_resize_queue, resize_container);
}
GTK_PRIVATE_SET_FLAG (container, GTK_RESIZE_NEEDED);
resize_container->resize_widgets =
g_slist_prepend (resize_container->resize_widgets, container);
break;
case GTK_RESIZE_IMMEDIATE:
GTK_PRIVATE_SET_FLAG (container, GTK_RESIZE_NEEDED);
resize_container->resize_widgets =
g_slist_prepend (resize_container->resize_widgets, container);
gtk_container_check_resize (resize_container);
break;
case GTK_RESIZE_PARENT:
/* Ignore, should not be 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 (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
gtk_signal_emit (GTK_OBJECT (container), container_signals[CHECK_RESIZE]);
}
static void
gtk_container_real_check_resize (GtkContainer *container)
{
GtkWidget *widget;
GtkRequisition requisition;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
widget = GTK_WIDGET (container);
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 run through the list of resize
* widgets and reallocate their sizes appropriately. We
* make the optimization of not performing reallocation
* for a widget who also has a parent in the resize widgets
* list. GTK_RESIZE_NEEDED is used for flagging those
* parents inside this function.
*/
void
gtk_container_resize_children (GtkContainer *container)
{
GtkWidget *widget;
GtkWidget *resize_container;
GSList *resize_widgets;
GSList *resize_containers;
GSList *node;
/* resizing invariants:
* toplevels have *always* resize_mode != GTK_RESIZE_PARENT set.
* containers with resize_mode==GTK_RESIZE_PARENT have to have resize_widgets
* set to NULL.
* containers that are flagged RESIZE_NEEDED must have resize_widgets set to
* NULL, or are toplevels (thus have ->parent set to NULL).
* widgets that are in some container->resize_widgets list must be flagged with
* RESIZE_NEEDED.
* widgets that have RESIZE_NEEDED set must be referenced in some
* GTK_IS_RESIZE_CONTAINER (container)->resize_widgets list.
* containers that have an idle sizer pending must be flagged with
* RESIZE_PENDING.
*/
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
/* we first check out if we actually need to perform a resize,
* which is not the case if we got another container queued for
* a resize in our anchestry. also we can skip the whole
* resize_widgets checks if we are a toplevel and NEED_RESIZE.
* this code assumes that our allocation is sufficient for our
* requisition, since otherwise we would NEED_RESIZE.
*/
resize_container = GTK_WIDGET (container);
while (resize_container)
{
if (GTK_WIDGET_RESIZE_NEEDED (resize_container))
break;
resize_container = resize_container->parent;
}
if (resize_container)
{
/* queue_resize and size_allocate both clear our
* resize_widgets list.
*/
if (resize_container->parent)
gtk_container_queue_resize (container);
else
gtk_widget_size_allocate (GTK_WIDGET (container),
&GTK_WIDGET (container)->allocation);
return;
}
resize_container = GTK_WIDGET (container);
/* we now walk the anchestry for all resize widgets as long
* as they are our children and as long as their allocation
* is insufficient, since we don't need to reallocate below that.
*/
resize_widgets = container->resize_widgets;
container->resize_widgets = NULL;
for (node = resize_widgets; node; node = node->next)
{
widget = node->data;
GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_NEEDED);
while (widget->parent != resize_container &&
((widget->allocation.width < widget->requisition.width) ||
(widget->allocation.height < widget->requisition.height)))
widget = widget->parent;
GTK_PRIVATE_SET_FLAG (widget, GTK_RESIZE_NEEDED);
node->data = widget;
}
/* for the newly setup resize_widgets list, we now walk each widget's
* anchestry to sort those widgets out that have RESIZE_NEEDED parents.
* we can safely stop the walk if we are the parent, since we checked
* our own anchestry already.
*/
resize_containers = NULL;
for (node = resize_widgets; node; node = node->next)
{
GtkWidget *parent;
widget = node->data;
if (!GTK_WIDGET_RESIZE_NEEDED (widget))
continue;
parent = widget->parent;
while (parent != resize_container)
{
if (GTK_WIDGET_RESIZE_NEEDED (parent))
{
GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_NEEDED);
widget = parent;
}
parent = parent->parent;
}
if (!g_slist_find (resize_containers, widget))
{
resize_containers = g_slist_prepend (resize_containers, widget);
gtk_widget_ref (widget);
}
}
g_slist_free (resize_widgets);
for (node = resize_containers; node; node = node->next)
{
widget = node->data;
GTK_PRIVATE_UNSET_FLAG (widget, GTK_RESIZE_NEEDED);
gtk_widget_size_allocate (widget, &widget->allocation);
gtk_widget_unref (widget);
}
g_slist_free (resize_containers);
}
/**
* 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 (container != NULL);
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 (container != NULL);
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 = GTK_OBJECT_TYPE (child);
GTK_VALUE_OBJECT (args[0]) = GTK_OBJECT (child);
/* location for return value */
args[1].name = NULL;
args[1].type = GTK_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,
GtkDestroyNotify notify)
{
g_return_if_fail (container != NULL);
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);
}
gboolean
gtk_container_focus (GtkContainer *container,
GtkDirectionType direction)
{
gint return_val;
g_return_val_if_fail (container != NULL, FALSE);
g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
gtk_signal_emit (GTK_OBJECT (container),
container_signals[FOCUS],
direction, &return_val);
return return_val;
}
void
gtk_container_set_focus_child (GtkContainer *container,
GtkWidget *widget)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
if (widget)
g_return_if_fail (GTK_IS_WIDGET (widget));
gtk_signal_emit (GTK_OBJECT (container), container_signals[SET_FOCUS_CHILD], widget);
}
GList*
gtk_container_children (GtkContainer *container)
{
GList *children;
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",
gtk_type_name (GTK_OBJECT_TYPE (child)),
data.index);
return name;
}
gchar*
gtk_container_child_composite_name (GtkContainer *container,
GtkWidget *child)
{
g_return_val_if_fail (container != NULL, NULL);
g_return_val_if_fail (GTK_IS_CONTAINER (container), NULL);
g_return_val_if_fail (child != NULL, NULL);
g_return_val_if_fail (GTK_IS_WIDGET (child), NULL);
g_return_val_if_fail (child->parent == GTK_WIDGET (container), NULL);
if (GTK_WIDGET_COMPOSITE_CHILD (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 = gtk_object_get_data_by_id (GTK_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;
}
void
gtk_container_real_set_focus_child (GtkContainer *container,
GtkWidget *child)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
if (child)
g_return_if_fail (GTK_IS_WIDGET (child));
if (child != container->focus_child)
{
if (container->focus_child)
gtk_widget_unref (container->focus_child);
container->focus_child = child;
if (container->focus_child)
gtk_widget_ref (container->focus_child);
}
/* check for h/v adjustments
*/
if (container->focus_child)
{
GtkAdjustment *adjustment;
adjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), vadjustment_key_id);
if (adjustment)
gtk_adjustment_clamp_page (adjustment,
container->focus_child->allocation.y,
(container->focus_child->allocation.y +
container->focus_child->allocation.height));
adjustment = gtk_object_get_data_by_id (GTK_OBJECT (container), hadjustment_key_id);
if (adjustment)
gtk_adjustment_clamp_page (adjustment,
container->focus_child->allocation.x,
(container->focus_child->allocation.x +
container->focus_child->allocation.width));
}
}
static GList*
get_focus_chain (GtkContainer *container)
{
GList *chain;
chain = g_object_get_data (G_OBJECT (container), "gtk-container-focus-chain");
return chain;
}
static GList*
filter_unfocusable (GtkContainer *container,
GList *list)
{
GList *tmp_list;
GList *tmp_list2;
tmp_list = list;
while (tmp_list)
{
if (GTK_WIDGET_IS_SENSITIVE (tmp_list->data) &&
GTK_WIDGET_DRAWABLE (tmp_list->data) &&
(GTK_IS_CONTAINER (tmp_list->data) || GTK_WIDGET_CAN_FOCUS (tmp_list->data)))
tmp_list = tmp_list->next;
else
{
tmp_list2 = tmp_list;
tmp_list = tmp_list->next;
list = g_list_remove_link (list, tmp_list2);
g_list_free_1 (tmp_list2);
}
}
return list;
}
static gboolean
gtk_container_real_focus (GtkContainer *container,
GtkDirectionType direction)
{
GList *children;
gint return_val;
g_return_val_if_fail (container != NULL, FALSE);
g_return_val_if_fail (GTK_IS_CONTAINER (container), FALSE);
/* Fail if the container is inappropriate for focus movement
*/
if (!GTK_WIDGET_DRAWABLE (container) ||
!GTK_WIDGET_IS_SENSITIVE (container))
return FALSE;
return_val = FALSE;
if (GTK_WIDGET_CAN_FOCUS (container))
{
if (!GTK_WIDGET_HAS_FOCUS (container))
{
gtk_widget_grab_focus (GTK_WIDGET (container));
return_val = TRUE;
}
}
else
{
/* Get a list of the containers children, allowing focus
* chain to override.
*/
if (container->has_focus_chain)
{
GList *chain;
chain = get_focus_chain (container);
children = g_list_copy (chain);
}
else
{
children = NULL;
gtk_container_forall (container,
gtk_container_children_callback,
&children);
children = g_list_reverse (children);
}
if (children)
{
/* Remove any children which are inappropriate for focus movement
*/
children = filter_unfocusable (container, children);
switch (direction)
{
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_TAB_BACKWARD:
if (container->has_focus_chain)
{
if (direction == GTK_DIR_TAB_BACKWARD)
children = g_list_reverse (children);
return_val = gtk_container_focus_move (container, children, direction);
}
else
return_val = gtk_container_focus_tab (container, children, direction);
break;
case GTK_DIR_UP:
case GTK_DIR_DOWN:
return_val = gtk_container_focus_up_down (container, &children, direction);
break;
case GTK_DIR_LEFT:
case GTK_DIR_RIGHT:
return_val = gtk_container_focus_left_right (container, &children, direction);
break;
}
g_list_free (children);
}
}
return return_val;
}
static gboolean
gtk_container_focus_tab (GtkContainer *container,
GList *children,
GtkDirectionType direction)
{
GtkWidget *child;
GtkWidget *child2;
GList *tmp_list;
guint length;
guint i, j;
length = g_list_length (children);
/* sort the children in the y direction */
for (i = 1; i < length; i++)
{
j = i;
tmp_list = g_list_nth (children, j);
child = tmp_list->data;
while (j > 0)
{
child2 = tmp_list->prev->data;
if (child->allocation.y < child2->allocation.y)
{
tmp_list->data = tmp_list->prev->data;
tmp_list = tmp_list->prev;
j--;
}
else
break;
}
tmp_list->data = child;
}
/* sort the children in the x direction while
* maintaining the y direction sort.
*/
for (i = 1; i < length; i++)
{
j = i;
tmp_list = g_list_nth (children, j);
child = tmp_list->data;
while (j > 0)
{
child2 = tmp_list->prev->data;
if ((child->allocation.x < child2->allocation.x) &&
(child->allocation.y == child2->allocation.y))
{
tmp_list->data = tmp_list->prev->data;
tmp_list = tmp_list->prev;
j--;
}
else
break;
}
tmp_list->data = child;
}
/* if we are going backwards then reverse the order
* of the children.
*/
if (direction == GTK_DIR_TAB_BACKWARD)
children = g_list_reverse (children);
return gtk_container_focus_move (container, children, direction);
}
static gboolean
old_focus_coords (GtkContainer *container, GdkRectangle *old_focus_rect)
{
GtkWidget *widget = GTK_WIDGET (container);
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
if (toplevel &&
GTK_IS_WINDOW (toplevel) && GTK_WINDOW (toplevel)->focus_widget &&
GTK_WIDGET_REALIZED (container) &&
GTK_WIDGET_REALIZED (GTK_WINDOW (toplevel)->focus_widget))
{
GtkWidget *old_focus = GTK_WINDOW (toplevel)->focus_widget;
GdkWindow *old_parent_window = old_focus->parent ? old_focus->parent->window : old_focus->window;
GdkWindow *new_parent_window = widget->window;
GdkWindow *toplevel_window = toplevel->window;
*old_focus_rect = old_focus->allocation;
/* Translate coordinates to the toplevel */
while (old_parent_window != toplevel_window)
{
gint dx, dy;
gdk_window_get_position (old_parent_window, &dx, &dy);
old_focus_rect->x += dx;
old_focus_rect->y += dy;
old_parent_window = gdk_window_get_parent (old_parent_window);
}
/* Translate coordinates back to the new container */
while (new_parent_window != toplevel_window)
{
gint dx, dy;
gdk_window_get_position (new_parent_window, &dx, &dy);
old_focus_rect->x -= dx;
old_focus_rect->y -= dy;
new_parent_window = gdk_window_get_parent (new_parent_window);
}
return TRUE;
}
return FALSE;
}
typedef struct _CompareInfo CompareInfo;
struct _CompareInfo
{
gint x;
gint y;
};
static gint
up_down_compare (gconstpointer a,
gconstpointer b,
gpointer data)
{
const GtkWidget *child1 = a;
const GtkWidget *child2 = b;
CompareInfo *compare = data;
gint y1 = child1->allocation.y + child1->allocation.height / 2;
gint y2 = child2->allocation.y + child2->allocation.height / 2;
if (y1 == y2)
{
gint x1 = abs (child1->allocation.x + child1->allocation.width / 2 - compare->x);
gint x2 = abs (child2->allocation.x + child2->allocation.width / 2 - compare->x);
if (compare->y < y1)
return (x1 < x2) ? -1 : ((x1 == x2) ? 0 : 1);
else
return (x1 < x2) ? 1 : ((x1 == x2) ? 0 : -1);
}
else
return (y1 < y2) ? -1 : 1;
}
static gboolean
gtk_container_focus_up_down (GtkContainer *container,
GList **children,
GtkDirectionType direction)
{
CompareInfo compare;
GList *tmp_list;
if (container->focus_child)
{
gint compare_x1;
gint compare_x2;
gint compare_y;
/* Delete widgets from list that don't match minimum criteria */
compare_x1 = container->focus_child->allocation.x;
compare_x2 = container->focus_child->allocation.x + container->focus_child->allocation.width;
if (direction == GTK_DIR_UP)
compare_y = container->focus_child->allocation.y;
else
compare_y = container->focus_child->allocation.y + container->focus_child->allocation.height;
tmp_list = *children;
while (tmp_list)
{
GtkWidget *child = tmp_list->data;
GList *next = tmp_list->next;
gint child_x1, child_x2;
if (child != container->focus_child)
{
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);
}
}
tmp_list = next;
}
compare.x = (compare_x1 + compare_x2) / 2;
compare.y = container->focus_child->allocation.y + container->focus_child->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_NO_WINDOW (widget))
compare.x = widget->allocation.x + widget->allocation.width / 2;
else
compare.x = widget->allocation.width / 2;
}
if (GTK_WIDGET_NO_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 (direction == GTK_DIR_UP)
*children = g_list_reverse (*children);
return gtk_container_focus_move (container, *children, direction);
}
static gint
left_right_compare (gconstpointer a,
gconstpointer b,
gpointer data)
{
const GtkWidget *child1 = a;
const GtkWidget *child2 = b;
CompareInfo *compare = data;
gint x1 = child1->allocation.x + child1->allocation.width / 2;
gint x2 = child2->allocation.x + child2->allocation.width / 2;
if (x1 == x2)
{
gint y1 = abs (child1->allocation.y + child1->allocation.height / 2 - compare->y);
gint y2 = abs (child2->allocation.y + child2->allocation.height / 2 - compare->y);
if (compare->x < x1)
return (y1 < y2) ? -1 : ((y1 == y2) ? 0 : 1);
else
return (y1 < y2) ? 1 : ((y1 == y2) ? 0 : -1);
}
else
return (x1 < x2) ? -1 : 1;
}
static gboolean
gtk_container_focus_left_right (GtkContainer *container,
GList **children,
GtkDirectionType direction)
{
CompareInfo compare;
GList *tmp_list;
if (container->focus_child)
{
gint compare_y1;
gint compare_y2;
gint compare_x;
/* Delete widgets from list that don't match minimum criteria */
compare_y1 = container->focus_child->allocation.y;
compare_y2 = container->focus_child->allocation.y + container->focus_child->allocation.height;
if (direction == GTK_DIR_LEFT)
compare_x = container->focus_child->allocation.x;
else
compare_x = container->focus_child->allocation.x + container->focus_child->allocation.width;
tmp_list = *children;
while (tmp_list)
{
GtkWidget *child = tmp_list->data;
GList *next = tmp_list->next;
gint child_y1, child_y2;
if (child != container->focus_child)
{
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);
}
}
tmp_list = next;
}
compare.y = (compare_y1 + compare_y2) / 2;
compare.x = container->focus_child->allocation.x + container->focus_child->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_NO_WINDOW (widget))
compare.y = widget->allocation.y + widget->allocation.height / 2;
else
compare.y = widget->allocation.height / 2;
}
if (GTK_WIDGET_NO_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 (direction == GTK_DIR_LEFT)
*children = g_list_reverse (*children);
return gtk_container_focus_move (container, *children, direction);
}
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_DRAWABLE (child) &&
GTK_IS_CONTAINER (child))
if (gtk_container_focus (GTK_CONTAINER (child), direction))
return TRUE;
}
}
else if (GTK_WIDGET_DRAWABLE (child) &&
gtk_widget_is_ancestor (child, GTK_WIDGET (container)))
{
if (GTK_IS_CONTAINER (child))
{
if (gtk_container_focus (GTK_CONTAINER (child), direction))
return TRUE;
}
else if (GTK_WIDGET_CAN_FOCUS (child))
{
gtk_widget_grab_focus (child);
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);
}
/* Hack-around */
#define g_signal_handlers_disconnect_by_func(obj, func, data) g_signal_handlers_disconnect_matched (obj, G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA, 0, 0, NULL, func, data)
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 (G_OBJECT (widget),
chain_widget_destroyed,
user_data);
g_object_set_data (G_OBJECT (container),
"gtk-container-focus-chain",
chain);
}
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);
gtk_signal_connect (GTK_OBJECT (tmp_list->data),
"destroy",
GTK_SIGNAL_FUNC (chain_widget_destroyed),
container);
tmp_list = g_list_next (tmp_list);
}
chain = g_list_reverse (chain);
g_object_set_data (G_OBJECT (container),
"gtk-container-focus-chain",
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), "gtk-container-focus-chain",
NULL);
tmp_list = chain;
while (tmp_list != NULL)
{
g_signal_handlers_disconnect_by_func (G_OBJECT (tmp_list->data),
chain_widget_destroyed,
container);
tmp_list = g_list_next (tmp_list);
}
g_list_free (chain);
}
}
void
gtk_container_set_focus_vadjustment (GtkContainer *container,
GtkAdjustment *adjustment)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (adjustment)
gtk_object_ref (GTK_OBJECT(adjustment));
gtk_object_set_data_by_id_full (GTK_OBJECT (container),
vadjustment_key_id,
adjustment,
(GtkDestroyNotify) gtk_object_unref);
}
void
gtk_container_set_focus_hadjustment (GtkContainer *container,
GtkAdjustment *adjustment)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_CONTAINER (container));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (adjustment)
gtk_object_ref (GTK_OBJECT (adjustment));
gtk_object_set_data_by_id_full (GTK_OBJECT (container),
hadjustment_key_id,
adjustment,
(GtkDestroyNotify) gtk_object_unref);
}
static void
gtk_container_show_all (GtkWidget *widget)
{
g_return_if_fail (widget != NULL);
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 (widget != NULL);
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 (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_CONTAINER (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (GTK_WIDGET_DRAWABLE (widget))
{
data.container = widget;
data.event = event;
gtk_container_foreach (GTK_CONTAINER (widget),
gtk_container_expose_child,
&data);
}
return TRUE;
}
/**
* 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, 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
* ::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)
{
GdkEventExpose 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_DRAWABLE (child) &&
GTK_WIDGET_NO_WINDOW (child) &&
(child->window == event->window))
{
child_event = *event;
child_event.region = gtk_widget_region_intersect (child, event->region);
if (!gdk_region_empty (child_event.region))
{
gdk_region_get_clipbox (child_event.region, &child_event.area);
gtk_widget_send_expose (child, (GdkEvent *)&child_event);
}
gdk_region_destroy (child_event.region);
}
}
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