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358
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1 /* GTK - The GIMP Toolkit
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2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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3 *
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4 * This library is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Library General Public
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6 * License as published by the Free Software Foundation; either
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7 * version 2 of the License, or (at your option) any later version.
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8 *
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9 * This library is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 * Library General Public License for more details.
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13 *
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14 * You should have received a copy of the GNU Library General Public
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15 * License along with this library; if not, write to the
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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17 * Boston, MA 02111-1307, USA.
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18 */
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19
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20 /*
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21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
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22 * file for a list of people on the GTK+ Team. See the ChangeLog
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23 * files for a list of changes. These files are distributed with
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24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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25 */
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26
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27 #ifndef __GTK_CURVE_H__
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28 #define __GTK_CURVE_H__
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29
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30
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31 #include <gdk/gdk.h>
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32 #include <gtk/gtkdrawingarea.h>
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33
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34 #ifdef __cplusplus
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35 extern "C" {
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36 #endif /* __cplusplus */
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37
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38
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39 #define GTK_TYPE_CURVE (gtk_curve_get_type ())
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40 #define GTK_CURVE(obj) (GTK_CHECK_CAST ((obj), GTK_TYPE_CURVE, GtkCurve))
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41 #define GTK_CURVE_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_CURVE, GtkCurveClass))
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42 #define GTK_IS_CURVE(obj) (GTK_CHECK_TYPE ((obj), GTK_TYPE_CURVE))
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43 #define GTK_IS_CURVE_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CURVE))
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44
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45
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46 typedef struct _GtkCurve GtkCurve;
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47 typedef struct _GtkCurveClass GtkCurveClass;
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48
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49
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50 struct _GtkCurve
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51 {
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52 GtkDrawingArea graph;
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53
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54 gint cursor_type;
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55 gfloat min_x;
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56 gfloat max_x;
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57 gfloat min_y;
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58 gfloat max_y;
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59 GdkPixmap *pixmap;
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60 GtkCurveType curve_type;
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61 gint height; /* (cached) graph height in pixels */
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62 gint grab_point; /* point currently grabbed */
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63 gint last;
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64
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65 /* (cached) curve points: */
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66 gint num_points;
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67 GdkPoint *point;
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68
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69 /* control points: */
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70 gint num_ctlpoints; /* number of control points */
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71 gfloat (*ctlpoint)[2]; /* array of control points */
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72 };
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73
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74 struct _GtkCurveClass
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75 {
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76 GtkDrawingAreaClass parent_class;
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77
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78 void (* curve_type_changed) (GtkCurve *curve);
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79 };
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80
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81
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82 GtkType gtk_curve_get_type (void);
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83 GtkWidget* gtk_curve_new (void);
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84 void gtk_curve_reset (GtkCurve *curve);
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85 void gtk_curve_set_gamma (GtkCurve *curve, gfloat gamma);
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86 void gtk_curve_set_range (GtkCurve *curve,
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87 gfloat min_x, gfloat max_x,
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88 gfloat min_y, gfloat max_y);
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89 void gtk_curve_get_vector (GtkCurve *curve,
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90 int veclen, gfloat vector[]);
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91 void gtk_curve_set_vector (GtkCurve *curve,
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92 int veclen, gfloat vector[]);
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93 void gtk_curve_set_curve_type (GtkCurve *curve, GtkCurveType type);
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94
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95
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96 #ifdef __cplusplus
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97 }
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98 #endif /* __cplusplus */
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99
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100
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101 #endif /* __GTK_CURVE_H__ */
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