/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
 *
 * gimpcolorscale.h
 * Copyright (C) 2002  Sven Neumann <sven@gimp.org>
 *                     Michael Natterer <mitch@gimp.org>
 *
 * 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 3 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, see
 * <http://www.gnu.org/licenses/>.
 */

/* This provides a color preview area. The preview
 * can handle transparency by showing the checkerboard and
 * handles drag'n'drop.
 */

#ifndef __GIMP_COLOR_SCALE_H__
#define __GIMP_COLOR_SCALE_H__

G_BEGIN_DECLS


#define GIMP_TYPE_COLOR_SCALE            (gimp_color_scale_get_type ())
#define GIMP_COLOR_SCALE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_COLOR_SCALE, GimpColorScale))
#define GIMP_COLOR_SCALE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_SCALE, GimpColorScaleClass))
#define GIMP_IS_COLOR_SCALE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_COLOR_SCALE))
#define GIMP_IS_COLOR_SCALE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_SCALE))
#define GIMP_COLOR_SCALE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_SCALE, GimpColorScaleClass))


typedef struct _GimpColorScaleClass  GimpColorScaleClass;

struct _GimpColorScale
{
  GtkScale                  parent_instance;

  /*< private >*/
  GimpColorSelectorChannel  channel;
  GimpRGB                   rgb;
  GimpHSV                   hsv;

  guchar                   *buf;
  guint                     width;
  guint                     height;
  guint                     rowstride;

  gboolean                  needs_render;
};

struct _GimpColorScaleClass
{
  GtkScaleClass             parent_class;

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


GType       gimp_color_scale_get_type    (void) G_GNUC_CONST;
GtkWidget * gimp_color_scale_new         (GtkOrientation            orientation,
                                          GimpColorSelectorChannel  channel);

void        gimp_color_scale_set_channel (GimpColorScale           *scale,
                                          GimpColorSelectorChannel  channel);
void        gimp_color_scale_set_color   (GimpColorScale           *scale,
                                          const GimpRGB            *rgb,
                                          const GimpHSV            *hsv);


G_END_DECLS

#endif /* __GIMP_COLOR_SCALE_H__ */
