2 Copyright (C) 2013 Paul Davis
3 Copyright (C) 2014 Robin Gareus <robin@gareus.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program 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
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __CANVAS_XFADECURVE_H__
21 #define __CANVAS_XFADECURVE_H__
23 #include "canvas/visibility.h"
24 #include "canvas/item.h"
25 #include "canvas/curve.h"
27 namespace ArdourCanvas {
29 class LIBCANVAS_API XFadeCurve : public Item, public InterpolatedCurve
37 XFadeCurve (Canvas *);
38 XFadeCurve (Canvas *, XFadePosition);
40 XFadeCurve (Group*, XFadePosition);
42 void set_fade_position (XFadePosition xfp) { _xfadeposition = xfp; }
44 void compute_bounding_box () const;
45 void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
47 void set_points_per_segment (uint32_t n);
48 void set_inout (Points const & in, Points const & out);
50 void set_outline_color (Color c) {
51 begin_visual_change ();
56 void set_fill_color (Color c) {
57 begin_visual_change ();
64 CanvasCurve() : n_samples(0) { }
67 Points::size_type n_samples;
70 Cairo::Path * get_path(Rect const &, Cairo::RefPtr<Cairo::Context>, CanvasCurve const &) const;
71 void close_path(Rect const &, Cairo::RefPtr<Cairo::Context>, CanvasCurve const &p, bool) const;
73 uint32_t points_per_segment;
78 XFadePosition _xfadeposition;