gtk2/modules/other/gail/gaillist.c

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/* GAIL - The GNOME Accessibility Enabling Library
* Copyright 2001 Sun Microsystems Inc.
*
* 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.
*/
#include <gtk/gtk.h>
#include "gaillist.h"
#include "gailcombo.h"
static void gail_list_class_init (GailListClass *klass);
static gint gail_list_get_index_in_parent (AtkObject *accessible);
static void atk_selection_interface_init (AtkSelectionIface *iface);
static gboolean gail_list_add_selection (AtkSelection *selection,
gint i);
static gboolean gail_list_clear_selection (AtkSelection *selection);
static AtkObject* gail_list_ref_selection (AtkSelection *selection,
gint i);
static gint gail_list_get_selection_count (AtkSelection *selection);
static gboolean gail_list_is_child_selected (AtkSelection *selection,
gint i);
static gboolean gail_list_remove_selection (AtkSelection *selection,
gint i);
static GailContainerClass *parent_class = NULL;
GType
gail_list_get_type (void)
{
static GType type = 0;
if (!type)
{
static const GTypeInfo tinfo =
{
sizeof (GailListClass),
(GBaseInitFunc) NULL, /* base init */
(GBaseFinalizeFunc) NULL, /* base finalize */
(GClassInitFunc) gail_list_class_init, /* class init */
(GClassFinalizeFunc) NULL, /* class finalize */
NULL, /* class data */
sizeof (GailList), /* instance size */
0, /* nb preallocs */
(GInstanceInitFunc) NULL, /* instance init */
NULL /* value table */
};
static const GInterfaceInfo atk_selection_info =
{
(GInterfaceInitFunc) atk_selection_interface_init,
(GInterfaceFinalizeFunc) NULL,
NULL
};
type = g_type_register_static (GAIL_TYPE_CONTAINER,
"GailList", &tinfo, 0);
g_type_add_interface_static (type, ATK_TYPE_SELECTION,
&atk_selection_info);
}
return type;
}
static void
gail_list_class_init (GailListClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
class->get_index_in_parent = gail_list_get_index_in_parent;
}
AtkObject*
gail_list_new (GtkWidget *widget)
{
GObject *object;
AtkObject *accessible;
g_return_val_if_fail (GTK_IS_LIST (widget), NULL);
object = g_object_new (GAIL_TYPE_LIST, NULL);
accessible = ATK_OBJECT (object);
atk_object_initialize (accessible, widget);
accessible->role = ATK_ROLE_LIST;
return accessible;
}
static gint
gail_list_get_index_in_parent (AtkObject *accessible)
{
/*
* If the parent widget is a combo box then the index is 0
* otherwise do the normal thing.
*/
if (accessible->accessible_parent)
{
if (GAIL_IS_COMBO (accessible->accessible_parent))
return 0;
}
return ATK_OBJECT_CLASS (parent_class)->get_index_in_parent (accessible);
}
static void
atk_selection_interface_init (AtkSelectionIface *iface)
{
g_return_if_fail (iface != NULL);
iface->add_selection = gail_list_add_selection;
iface->clear_selection = gail_list_clear_selection;
iface->ref_selection = gail_list_ref_selection;
iface->get_selection_count = gail_list_get_selection_count;
iface->is_child_selected = gail_list_is_child_selected;
iface->remove_selection = gail_list_remove_selection;
/*
* select_all_selection does not make sense for a combo box
* so no implementation is provided.
*/
}
static gboolean
gail_list_add_selection (AtkSelection *selection,
gint i)
{
GtkList *list;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
list = GTK_LIST (widget);
gtk_list_select_item (list, i);
return TRUE;
}
static gboolean
gail_list_clear_selection (AtkSelection *selection)
{
GtkList *list;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
list = GTK_LIST (widget);
gtk_list_unselect_all (list);
return TRUE;
}
static AtkObject*
gail_list_ref_selection (AtkSelection *selection,
gint i)
{
GtkList *list;
GList *g_list;
GtkWidget *item;
AtkObject *obj;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return NULL;
list = GTK_LIST (widget);
/*
* A combo box can have only one selection.
*/
if (i != 0)
return NULL;
g_list = list->selection;
if (g_list == NULL)
return NULL;
item = GTK_WIDGET (g_list->data);
obj = gtk_widget_get_accessible (item);
g_object_ref (obj);
return obj;
}
static gint
gail_list_get_selection_count (AtkSelection *selection)
{
GtkList *list;
GList *g_list;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return 0;
list = GTK_LIST (widget);
g_list = list->selection;
return g_list_length (g_list);;
}
static gboolean
gail_list_is_child_selected (AtkSelection *selection,
gint i)
{
GtkList *list;
GList *g_list;
GtkWidget *item;
gint j;
GtkWidget *widget;
widget = GTK_ACCESSIBLE (selection)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return FALSE;
list = GTK_LIST (widget);
g_list = list->selection;
if (g_list == NULL)
return FALSE;
item = GTK_WIDGET (g_list->data);
j = g_list_index (list->children, item);
return (j == i);
}
static gboolean
gail_list_remove_selection (AtkSelection *selection,
gint i)
{
if (atk_selection_is_child_selected (selection, i))
atk_selection_clear_selection (selection);
return TRUE;
}