1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the Free
16 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 #ifndef __GTK_CURVE_H__
19 #define __GTK_CURVE_H__
23 #include <gtk/gtkdrawingarea.h>
27 #endif /* __cplusplus */
30 #define GTK_CURVE(obj) GTK_CHECK_CAST (obj, gtk_curve_get_type (), GtkCurve)
31 #define GTK_CURVE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_curve_get_type, GtkCurveClass)
32 #define GTK_IS_CURVE(obj) GTK_CHECK_TYPE (obj, gtk_curve_get_type ())
35 typedef struct _GtkCurve GtkCurve;
36 typedef struct _GtkCurveClass GtkCurveClass;
40 GTK_CURVE_TYPE_LINEAR, /* linear interpolation */
41 GTK_CURVE_TYPE_SPLINE, /* spline interpolation */
42 GTK_CURVE_TYPE_FREE /* free form curve */
55 GtkCurveType curve_type;
56 gint height; /* (cached) graph height in pixels */
57 gint grab_point; /* point currently grabbed */
60 /* (cached) curve points: */
65 gint num_ctlpoints; /* number of control points */
66 gfloat (*ctlpoint)[2]; /* array of control points */
71 GtkDrawingAreaClass parent_class;
73 void (* curve_type_changed) (GtkCurve *curve);
77 guint gtk_curve_get_type (void);
78 GtkWidget* gtk_curve_new (void);
79 void gtk_curve_reset (GtkCurve *curve);
80 void gtk_curve_set_gamma (GtkCurve *curve, gfloat gamma);
81 void gtk_curve_set_range (GtkCurve *curve,
82 gfloat min_x, gfloat max_x,
83 gfloat min_y, gfloat max_y);
84 void gtk_curve_get_vector (GtkCurve *curve,
85 int veclen, gfloat vector[]);
86 void gtk_curve_set_vector (GtkCurve *curve,
87 int veclen, gfloat vector[]);
88 void gtk_curve_set_curve_type (GtkCurve *curve, GtkCurveType type);
93 #endif /* __cplusplus */
96 #endif /* __GTK_CURVE_H__ */