/* GTK - The GIMP Toolkit

 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library 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 __GTK_DIAL_H__

#define __GTK_DIAL_H__

#include <gdk/gdk.h>

#include <gtk/gtkadjustment.h>

#include <gtk/gtkwidget.h>

G_BEGIN_DECLS

#define GTK_DIAL(obj)          G_TYPE_CHECK_INSTANCE_CAST (obj, gtk_dial_get_type (), GtkDial)

#define GTK_DIAL_CLASS(klass)  G_TYPE_CHECK_CLASS_CAST (klass, gtk_dial_get_type (), GtkDialClass)

#define GTK_IS_DIAL(obj)       G_TYPE_CHECK_INSTANCE_TYPE (obj, gtk_dial_get_type ())

typedef struct _GtkDial        GtkDial;

typedef struct _GtkDialClass   GtkDialClass;

struct _GtkDial

{

  GtkWidget widget;

  /* update policy (GTK_UPDATE_[CONTINUOUS/DELAYED/DISCONTINUOUS]) */

  guint policy : 2;

  /* Button currently pressed or 0 if none */

  guint8 button;

  /* Dimensions of dial components */

  gint radius;

  gint pointer_width;

  /* ID of update timer, or 0 if none */

  guint32 timer;

  /* Current angle */

  gfloat angle;

  gfloat last_angle;

  /* Old values from adjustment stored so we know when something changes */

  gfloat old_value;

  gfloat old_lower;

  gfloat old_upper;

  /* The adjustment object that stores the data for this dial */

  GtkAdjustment *adjustment;

};

struct _GtkDialClass

{

  GtkWidgetClass parent_class;

};

GtkWidget*     gtk_dial_new                    (GtkAdjustment *adjustment);

GType          gtk_dial_get_type               (void);

GtkAdjustment* gtk_dial_get_adjustment         (GtkDial      *dial);

void           gtk_dial_set_update_policy      (GtkDial      *dial,

						GtkUpdateType  policy);

void           gtk_dial_set_adjustment         (GtkDial      *dial,

						GtkAdjustment *adjustment);

G_END_DECLS

#endif /* __GTK_DIAL_H__ */