97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __GTK_CURVE_H__
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#define __GTK_CURVE_H__
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#include <gdk/gdk.h>
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#include <gtk/gtkdrawingarea.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GTK_CURVE(obj) GTK_CHECK_CAST (obj, gtk_curve_get_type (), GtkCurve)
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#define GTK_CURVE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_curve_get_type, GtkCurveClass)
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#define GTK_IS_CURVE(obj) GTK_CHECK_TYPE (obj, gtk_curve_get_type ())
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typedef struct _GtkCurve GtkCurve;
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typedef struct _GtkCurveClass GtkCurveClass;
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typedef enum
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{
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GTK_CURVE_TYPE_LINEAR, /* linear interpolation */
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GTK_CURVE_TYPE_SPLINE, /* spline interpolation */
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GTK_CURVE_TYPE_FREE /* free form curve */
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} GtkCurveType;
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struct _GtkCurve
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{
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GtkDrawingArea graph;
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gint cursor_type;
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gfloat min_x;
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gfloat max_x;
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gfloat min_y;
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gfloat max_y;
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GdkPixmap *pixmap;
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GtkCurveType curve_type;
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gint height; /* (cached) graph height in pixels */
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gint grab_point; /* point currently grabbed */
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gint last;
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/* (cached) curve points: */
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gint num_points;
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GdkPoint *point;
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/* control points: */
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gint num_ctlpoints; /* number of control points */
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gfloat (*ctlpoint)[2]; /* array of control points */
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};
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struct _GtkCurveClass
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{
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GtkDrawingAreaClass parent_class;
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void (* curve_type_changed) (GtkCurve *curve);
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};
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guint gtk_curve_get_type (void);
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GtkWidget* gtk_curve_new (void);
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void gtk_curve_reset (GtkCurve *curve);
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void gtk_curve_set_gamma (GtkCurve *curve, gfloat gamma);
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void gtk_curve_set_range (GtkCurve *curve,
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gfloat min_x, gfloat max_x,
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gfloat min_y, gfloat max_y);
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void gtk_curve_get_vector (GtkCurve *curve,
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int veclen, gfloat vector[]);
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void gtk_curve_set_vector (GtkCurve *curve,
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int veclen, gfloat vector[]);
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void gtk_curve_set_curve_type (GtkCurve *curve, GtkCurveType type);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GTK_CURVE_H__ */
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