gtk2_ardour/canvas-curve.h

   1 /* libgnomecanvas/gnome-canvas-curve.h: GnomeCanvas item for constrained spline curves
   2  *
   3  * Copyright (C) 2003 Paul Davis <pbd@op.net>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  */
  21
  22 #ifndef __GNOME_CANVAS_CURVE_H__
  23 #define __GNOME_CANVAS_CURVE_H__
  24
  25 #include <libgnomecanvas/libgnomecanvas.h>
  26
  27 G_BEGIN_DECLS
  28
  29 /* Wave viewer item for canvas.
  30  */
  31
  32 #define GNOME_CANVAS_TYPE_CANVAS_CURVE            (gnome_canvas_curve_get_type ())
  33 #define GNOME_CANVAS_CURVE(obj)                   (GTK_CHECK_CAST ((obj), GNOME_CANVAS_TYPE_CANVAS_CURVE, GnomeCanvasCurve))
  34 #define GNOME_CANVAS_CURVE_CLASS(klass)           (GTK_CHECK_CLASS_CAST ((klass), GNOME_CANVAS_TYPE_CANVAS_CURVE, GnomeCanvasCurveClass))
  35 #define GNOME_CANVAS_IS_CANVAS_CURVE(obj)         (GTK_CHECK_TYPE ((obj), GNOME_CANVAS_TYPE_CANVAS_CURVE))
  36 #define GNOME_CANVAS_IS_CANVAS_CURVE_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GNOME_CANVAS_TYPE_CANVAS_CURVE))
  37
  38 typedef struct _GnomeCanvasCurve            GnomeCanvasCurve;
  39 typedef struct _GnomeCanvasCurveClass       GnomeCanvasCurveClass;
  40
  41 struct _GnomeCanvasCurve
  42 {
  43     GnomeCanvasItem item;
  44     double x1, y1, x2, y2;
  45     void* curve_arg;
  46     float* vector;
  47     size_t veclen;
  48     uint32_t color;
  49
  50     /* cached values set during update/used during render */
  51
  52     unsigned char r, b, g, a;
  53     guint32 bbox_ulx, bbox_uly;
  54     guint32 bbox_lrx, bbox_lry;
  55 };
  56
  57 struct _GnomeCanvasCurveClass {
  58         GnomeCanvasItemClass parent_class;
  59 };
  60
  61 GtkType gnome_canvas_curve_get_type (void);
  62
  63 G_END_DECLS
  64
  65 #endif /* __GNOME_CANVAS_CURVE_H__ */