/*
 * phatsvgknob.h
 *
 * A GTK+ widget that implements a knob face
 *
 * (C) 2007, Ulrich Lorenz Schlueter
 * 
 * derived from:
 * 	 http://www.gnomejournal.org/article/34/writing-a-widget-using-cairo-and-gtk28
 *   http://gnomejournal.org/article/36/writing-a-widget-using-cairo-and-gtk28-part-2
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *	
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Authors:
 *   Ulrich Lorenz Schlueter  <audio-mobster@email-addr-hidden>
 */

#ifndef __PHAT_SVG_KNOB_FACE_H__
#define __PHAT_SVG_KNOB_FACE_H__

#include <gtk/gtk.h>

G_BEGIN_DECLS

#define PHAT_TYPE_SVG_KNOB_FACE		(phat_svg_knob_face_get_type ())
#define PHAT_SVG_KNOB_FACE(obj)		(G_TYPE_CHECK_INSTANCE_CAST ((obj), PHAT_TYPE_SVG_KNOB_FACE, PhatSvgKnobFace))
#define PHAT_SVG_KNOB_FACE_CLASS(obj)	(G_TYPE_CHECK_CLASS_CAST ((obj), PHAT_SVG_KNOB_FACE, PhatSvgKnobFaceClass))
#define PHAT_IS_SVG_KNOB_FACE(obj)		(G_TYPE_CHECK_INSTANCE_TYPE ((obj), PHAT_TYPE_SVG_KNOB_FACE))
#define PHAT_IS_SVG_KNOB_FACE_CLASS(obj)	(G_TYPE_CHECK_CLASS_TYPE ((obj), PHAT_TYPE_SVG_KNOB_FACE))
#define PHAT_SVG_KNOB_FACE_GET_CLASS	(G_TYPE_INSTANCE_GET_CLASS ((obj), PHAT_TYPE_SVG_KNOB_FACE, PhatSvgKnobFaceClass))

#define PHAT_SVG_KNOB_DEFAULT_ADJUST (45)

typedef struct _PhatSvgKnobFace		PhatSvgKnobFace;
typedef struct _PhatSvgKnobFaceClass	PhatSvgKnobFaceClass;

struct _PhatSvgKnobFace
{
	GtkDrawingArea parent;

	/* < private > */
};

struct _PhatSvgKnobFaceClass
{
	GtkDrawingAreaClass parent_class;

	void	(* value_changed)	(PhatSvgKnobFace *knob, double decibel);
};

GtkWidget *phat_svg_knob_face_new (void);

G_END_DECLS

#endif