/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
 *
 * 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.
 */

#ifndef __GIMP_RULER_H__
#define __GIMP_RULER_H__

G_BEGIN_DECLS

#define GIMP_TYPE_RULER            (gimp_ruler_get_type ())
#define GIMP_RULER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_RULER, GimpRuler))
#define GIMP_RULER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_RULER, GimpRulerClass))
#define GIMP_IS_RULER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_RULER))
#define GIMP_IS_RULER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_RULER))
#define GIMP_RULER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_RULER, GimpRulerClass))


typedef struct _GimpRulerClass   GimpRulerClass;

struct _GimpRuler
{
  GtkWidget  parent_instance;
};

struct _GimpRulerClass
{
  GtkWidgetClass  parent_class;

  /* Padding for future expansion */
  void (*_gimp_reserved1) (void);
  void (*_gimp_reserved2) (void);
  void (*_gimp_reserved3) (void);
  void (*_gimp_reserved4) (void);
};


GType       gimp_ruler_get_type     (void) G_GNUC_CONST;

GtkWidget * gimp_ruler_new          (GtkOrientation  orientation);
void        gimp_ruler_set_unit     (GimpRuler      *ruler,
                                     GimpUnit        unit);
GimpUnit    gimp_ruler_get_unit     (GimpRuler      *ruler);
void        gimp_ruler_set_position (GimpRuler      *ruler,
                                     gdouble         position);
gdouble     gimp_ruler_get_position (GimpRuler      *ruler);
void        gimp_ruler_set_range    (GimpRuler      *ruler,
                                     gdouble         lower,
                                     gdouble         upper,
                                     gdouble         max_size);
void        gimp_ruler_get_range    (GimpRuler      *ruler,
                                     gdouble        *lower,
                                     gdouble        *upper,
                                     gdouble        *max_size);

G_END_DECLS

#endif /* __GIMP_RULER_H__ */
