1 files changed, 96 insertions, 0 deletions
diff --git a/gtk/gtkcurve.h b/gtk/gtkcurve.h
new file mode 100644
index 000000000..0e1568bc7
--- /dev/null
+++ b/gtk/gtkcurve.h
@@ -0,0 +1,96 @@
+/* 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 Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef __GTK_CURVE_H__
+#define __GTK_CURVE_H__
+
+
+#include <gdk/gdk.h>
+#include <gtk/gtkdrawingarea.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GTK_CURVE(obj)        GTK_CHECK_CAST (obj, gtk_curve_get_type (), GtkCurve)
+#define GTK_CURVE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_curve_get_type, GtkCurveClass)
+#define GTK_IS_CURVE(obj)     GTK_CHECK_TYPE (obj, gtk_curve_get_type ())
+
+
+typedef struct _GtkCurve	GtkCurve;
+typedef struct _GtkCurveClass	GtkCurveClass;
+
+typedef enum
+{
+  GTK_CURVE_TYPE_LINEAR,	/* linear interpolation */
+  GTK_CURVE_TYPE_SPLINE,	/* spline interpolation */
+  GTK_CURVE_TYPE_FREE		/* free form curve */
+} GtkCurveType;
+
+struct _GtkCurve
+{
+  GtkDrawingArea graph;
+
+  gint cursor_type;
+  gfloat min_x;
+  gfloat max_x;
+  gfloat min_y;
+  gfloat max_y;
+  GdkPixmap *pixmap;
+  GtkCurveType 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 _GtkCurveClass
+{
+  GtkDrawingAreaClass parent_class;
+
+  void (* curve_type_changed) (GtkCurve *curve);
+};
+
+
+guint		gtk_curve_get_type	(void);
+GtkWidget*	gtk_curve_new		(void);
+void		gtk_curve_reset		(GtkCurve *curve);
+void		gtk_curve_set_gamma	(GtkCurve *curve, gfloat gamma);
+void		gtk_curve_set_range	(GtkCurve *curve,
+					 gfloat min_x, gfloat max_x,
+					 gfloat min_y, gfloat max_y);
+void		gtk_curve_get_vector	(GtkCurve *curve,
+					 int veclen, gfloat vector[]);
+void		gtk_curve_set_vector	(GtkCurve *curve,
+					 int veclen, gfloat vector[]);
+void		gtk_curve_set_curve_type (GtkCurve *curve, GtkCurveType type);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GTK_CURVE_H__ */