michael@0: /* ATK -  Accessibility Toolkit
michael@0:  * Copyright 2001 Sun Microsystems Inc.
michael@0:  *
michael@0:  * This library is free software; you can redistribute it and/or
michael@0:  * modify it under the terms of the GNU Library General Public
michael@0:  * License as published by the Free Software Foundation; either
michael@0:  * version 2 of the License, or (at your option) any later version.
michael@0:  *
michael@0:  * This library is distributed in the hope that it will be useful,
michael@0:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
michael@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
michael@0:  * Library General Public License for more details.
michael@0:  *
michael@0:  * You should have received a copy of the GNU Library General Public
michael@0:  * License along with this library; if not, write to the
michael@0:  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
michael@0:  * Boston, MA 02111-1307, USA.
michael@0:  */
michael@0: 
michael@0: #ifndef __ATK_VALUE_H__
michael@0: #define __ATK_VALUE_H__
michael@0: 
michael@0: #include <atk/atkobject.h>
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: extern "C" {
michael@0: #endif /* __cplusplus */
michael@0: 
michael@0: /*
michael@0:  * The AtkValue interface should be supported by any object that 
michael@0:  * supports a numerical value (e.g., a scroll bar). This interface 
michael@0:  * provides the standard mechanism for an assistive technology to 
michael@0:  * determine and set the numerical value as well as get the minimum 
michael@0:  * and maximum values.
michael@0:  */
michael@0: 
michael@0: #define ATK_TYPE_VALUE                    (atk_value_get_type ())
michael@0: #define ATK_IS_VALUE(obj)                 G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_VALUE)
michael@0: #define ATK_VALUE(obj)                    G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_VALUE, AtkValue)
michael@0: #define ATK_VALUE_GET_IFACE(obj)          (G_TYPE_INSTANCE_GET_INTERFACE ((obj), ATK_TYPE_VALUE, AtkValueIface))
michael@0: 
michael@0: #ifndef _TYPEDEF_ATK_VALUE_
michael@0: #define _TYPEDEF_ATK_VALUE__
michael@0: typedef struct _AtkValue AtkValue;
michael@0: #endif
michael@0: typedef struct _AtkValueIface AtkValueIface;
michael@0: 
michael@0: struct _AtkValueIface
michael@0: {
michael@0:   GTypeInterface parent;
michael@0: 
michael@0:   void     (* get_current_value) (AtkValue     *obj,
michael@0:                                   GValue       *value);
michael@0:   void     (* get_maximum_value) (AtkValue     *obj,
michael@0:                                   GValue       *value);
michael@0:   void     (* get_minimum_value) (AtkValue     *obj,
michael@0:                                   GValue       *value);
michael@0:   gboolean (* set_current_value) (AtkValue     *obj,
michael@0:                                   const GValue *value);
michael@0:   void     (* get_minimum_increment) (AtkValue   *obj,
michael@0: 				      GValue     *value);
michael@0:   AtkFunction pad1;
michael@0: };
michael@0: 
michael@0: GType            atk_value_get_type (void);
michael@0: 
michael@0: void      atk_value_get_current_value (AtkValue     *obj,
michael@0:                                        GValue       *value);
michael@0: 
michael@0: 
michael@0: void     atk_value_get_maximum_value  (AtkValue     *obj,
michael@0:                                        GValue       *value);
michael@0: 
michael@0: void     atk_value_get_minimum_value  (AtkValue     *obj,
michael@0:                                        GValue       *value);
michael@0: 
michael@0: gboolean atk_value_set_current_value  (AtkValue     *obj,
michael@0:                                        const GValue *value);
michael@0: 
michael@0: void     atk_value_get_minimum_increment  (AtkValue     *obj,
michael@0: 					   GValue       *value);
michael@0: 
michael@0: /*
michael@0:  * Additional GObject properties exported by GaccessibleValue:
michael@0:  *    "accessible_value"
michael@0:  *       (the accessible value has changed)
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: }
michael@0: #endif /* __cplusplus */
michael@0: 
michael@0: 
michael@0: #endif /* __ATK_VALUE_H__ */