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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 Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
* NOTE this widget is considered too specialized/little-used for
* GTK+, and will in the future be moved to some other package. If
* your application needs this widget, feel free to use it, as the
* widget does work and is useful in some applications; it's just not
* of general interest. However, we are not accepting new features for
* the widget, and it will eventually move out of the GTK+
* distribution.
*/
#ifndef GUTENPRINTUI_CURVE_H
#define GUTENPRINTUI_CURVE_H
#include <gdk/gdk.h>
#include <gtk/gtkdrawingarea.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define STPUI_TYPE_CURVE (stpui_curve_get_type ())
#define STPUI_CURVE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), STPUI_TYPE_CURVE, StpuiCurve))
#define STPUI_CURVE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), STPUI_TYPE_CURVE, StpuiCurveClass))
#define STPUI_IS_CURVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), STPUI_TYPE_CURVE))
#define STPUI_IS_CURVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), STPUI_TYPE_CURVE))
#define STPUI_CURVE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), STPUI_TYPE_CURVE, StpuiCurveClass))
/* Curve types */
typedef enum
{
STPUI_CURVE_TYPE_LINEAR, /* linear interpolation */
STPUI_CURVE_TYPE_SPLINE, /* spline interpolation */
STPUI_CURVE_TYPE_FREE /* free form curve */
} StpuiCurveType;
typedef struct _StpuiCurve StpuiCurve;
typedef struct _StpuiCurveClass StpuiCurveClass;
struct _StpuiCurve
{
GtkDrawingArea graph;
gint cursor_type;
gfloat min_x;
gfloat max_x;
gfloat min_y;
gfloat max_y;
GdkPixmap *pixmap;
StpuiCurveType 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 _StpuiCurveClass
{
GtkDrawingAreaClass parent_class;
void (* curve_type_changed) (StpuiCurve *curve);
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
void (*_gtk_reserved3) (void);
void (*_gtk_reserved4) (void);
};
GType stpui_curve_get_type (void) G_GNUC_CONST;
GtkWidget* stpui_curve_new (void);
void stpui_curve_reset (StpuiCurve *curve);
void stpui_curve_set_gamma (StpuiCurve *curve, gfloat gamma_);
void stpui_curve_set_range (StpuiCurve *curve,
gfloat min_x, gfloat max_x,
gfloat min_y, gfloat max_y);
void stpui_curve_get_vector (StpuiCurve *curve,
int veclen, gfloat vector[]);
void stpui_curve_set_vector (StpuiCurve *curve,
int veclen, const gfloat vector[]);
void stpui_curve_set_curve_type (StpuiCurve *curve, StpuiCurveType type);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* GUTENPRINTUI_CURVE_H */
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