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/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001, 2002, 2003 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 "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gailadjustment.h"
static void gail_adjustment_class_init (GailAdjustmentClass *klass);
static void gail_adjustment_init (GailAdjustment *adjustment);
static void gail_adjustment_real_initialize (AtkObject *obj,
gpointer data);
static void atk_value_interface_init (AtkValueIface *iface);
static void gail_adjustment_get_current_value (AtkValue *obj,
GValue *value);
static void gail_adjustment_get_maximum_value (AtkValue *obj,
GValue *value);
static void gail_adjustment_get_minimum_value (AtkValue *obj,
GValue *value);
static gboolean gail_adjustment_set_current_value (AtkValue *obj,
const GValue *value);
static void gail_adjustment_destroyed (GtkAdjustment *adjustment,
GailAdjustment *gail_adjustment);
G_DEFINE_TYPE_WITH_CODE (GailAdjustment, gail_adjustment, ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))
static void
gail_adjustment_class_init (GailAdjustmentClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
class->initialize = gail_adjustment_real_initialize;
}
static void
gail_adjustment_init (GailAdjustment *adjustment)
{
}
AtkObject*
gail_adjustment_new (GtkAdjustment *adjustment)
{
GObject *object;
AtkObject *atk_object;
g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL);
object = g_object_new (GAIL_TYPE_ADJUSTMENT, NULL);
atk_object = ATK_OBJECT (object);
atk_object_initialize (atk_object, adjustment);
return atk_object;
}
static void
gail_adjustment_real_initialize (AtkObject *obj,
gpointer data)
{
GtkAdjustment *adjustment;
ATK_OBJECT_CLASS (gail_adjustment_parent_class)->initialize (obj, data);
adjustment = GTK_ADJUSTMENT (data);
obj->role = ATK_ROLE_UNKNOWN;
GAIL_ADJUSTMENT (obj)->adjustment = adjustment;
g_signal_connect_object (G_OBJECT (adjustment),
"destroy",
G_CALLBACK (gail_adjustment_destroyed),
obj, 0);
}
static void
atk_value_interface_init (AtkValueIface *iface)
{
iface->get_current_value = gail_adjustment_get_current_value;
iface->get_maximum_value = gail_adjustment_get_maximum_value;
iface->get_minimum_value = gail_adjustment_get_minimum_value;
iface->set_current_value = gail_adjustment_set_current_value;
}
static void
gail_adjustment_get_current_value (AtkValue *obj,
GValue *value)
{
GtkAdjustment* adjustment;
gdouble current_value;
adjustment = GAIL_ADJUSTMENT (obj)->adjustment;
if (adjustment == NULL)
{
/* State is defunct */
return;
}
current_value = adjustment->value;
memset (value, 0, sizeof (GValue));
g_value_init (value, G_TYPE_DOUBLE);
g_value_set_double (value,current_value);
}
static void
gail_adjustment_get_maximum_value (AtkValue *obj,
GValue *value)
{
GtkAdjustment* adjustment;
gdouble maximum_value;
adjustment = GAIL_ADJUSTMENT (obj)->adjustment;
if (adjustment == NULL)
{
/* State is defunct */
return;
}
maximum_value = adjustment->upper;
memset (value, 0, sizeof (GValue));
g_value_init (value, G_TYPE_DOUBLE);
g_value_set_double (value, maximum_value);
}
static void
gail_adjustment_get_minimum_value (AtkValue *obj,
GValue *value)
{
GtkAdjustment* adjustment;
gdouble minimum_value;
adjustment = GAIL_ADJUSTMENT (obj)->adjustment;
if (adjustment == NULL)
{
/* State is defunct */
return;
}
minimum_value = adjustment->lower;
memset (value, 0, sizeof (GValue));
g_value_init (value, G_TYPE_DOUBLE);
g_value_set_double (value, minimum_value);
}
static gboolean
gail_adjustment_set_current_value (AtkValue *obj,
const GValue *value)
{
if (G_VALUE_HOLDS_DOUBLE (value))
{
GtkAdjustment* adjustment;
gdouble new_value;
adjustment = GAIL_ADJUSTMENT (obj)->adjustment;
if (adjustment == NULL)
{
/* State is defunct */
return FALSE;
}
new_value = g_value_get_double (value);
gtk_adjustment_set_value (adjustment, new_value);
return TRUE;
}
else
return FALSE;
}
static void
gail_adjustment_destroyed (GtkAdjustment *adjustment,
GailAdjustment *gail_adjustment)
{
/*
* This is the signal handler for the "destroy" signal for the
* GtkAdjustment. We set the pointer location to NULL;
*/
gail_adjustment->adjustment = NULL;
}
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