| 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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