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/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __GTK_CURVE_H__
#define __GTK_CURVE_H__
#include <gdk/gdk.h>
#include <gtk/gtkdrawingarea.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GTK_CURVE(obj) GTK_CHECK_CAST (obj, gtk_curve_get_type (), GtkCurve)
#define GTK_CURVE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_curve_get_type, GtkCurveClass)
#define GTK_IS_CURVE(obj) GTK_CHECK_TYPE (obj, gtk_curve_get_type ())
typedef struct _GtkCurve GtkCurve;
typedef struct _GtkCurveClass GtkCurveClass;
typedef enum
{
GTK_CURVE_TYPE_LINEAR, /* linear interpolation */
GTK_CURVE_TYPE_SPLINE, /* spline interpolation */
GTK_CURVE_TYPE_FREE /* free form curve */
} GtkCurveType;
struct _GtkCurve
{
GtkDrawingArea graph;
gint cursor_type;
gfloat min_x;
gfloat max_x;
gfloat min_y;
gfloat max_y;
GdkPixmap *pixmap;
GtkCurveType curve_type;
gint height; /* (cached) graph height in pixels */
gint grab_point; /* point currently grabbed */
gint last;
/* (cached) curve points: */
gint num_points;
GdkPoint *point;
/* control points: */
gint num_ctlpoints; /* number of control points */
gfloat (*ctlpoint)[2]; /* array of control points */
};
struct _GtkCurveClass
{
GtkDrawingAreaClass parent_class;
void (* curve_type_changed) (GtkCurve *curve);
};
guint gtk_curve_get_type (void);
GtkWidget* gtk_curve_new (void);
void gtk_curve_reset (GtkCurve *curve);
void gtk_curve_set_gamma (GtkCurve *curve, gfloat gamma);
void gtk_curve_set_range (GtkCurve *curve,
gfloat min_x, gfloat max_x,
gfloat min_y, gfloat max_y);
void gtk_curve_get_vector (GtkCurve *curve,
int veclen, gfloat vector[]);
void gtk_curve_set_vector (GtkCurve *curve,
int veclen, gfloat vector[]);
void gtk_curve_set_curve_type (GtkCurve *curve, GtkCurveType type);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GTK_CURVE_H__ */
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