diff options
author | nick_m <mainsbridge@gmail.com> | 2016-05-18 03:26:18 +1000 |
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committer | nick_m <mainsbridge@gmail.com> | 2016-05-27 23:38:16 +1000 |
commit | 0c7ecc6cbb4baaa6d4aebcf7f4ff682b67f6b64c (patch) | |
tree | 76ad84fd948aecda854bce172e5069d43c8efc48 /libs/canvas/canvas | |
parent | 6209b3f445be993c64d7ae4cae09f7ef1eea48d0 (diff) |
Tempo ramps - add Canvas::FramedCurve and use it in the tempo marker bar.
Diffstat (limited to 'libs/canvas/canvas')
-rw-r--r-- | libs/canvas/canvas/framed_curve.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libs/canvas/canvas/framed_curve.h b/libs/canvas/canvas/framed_curve.h new file mode 100644 index 0000000000..9e99c59d2f --- /dev/null +++ b/libs/canvas/canvas/framed_curve.h @@ -0,0 +1,66 @@ +/* + Copyright (C) 2013 Paul Davis + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#ifndef __CANVAS_FRAMED_CURVE_H__ +#define __CANVAS_FRAMED_CURVE_H__ + +#include "canvas/visibility.h" + +#include "canvas/interpolated_curve.h" +#include "canvas/poly_item.h" +#include "canvas/fill.h" + +/* similar to a Curve, with the first point being a height definition rather than a point to + interpolate. +*/ + +namespace ArdourCanvas { + +class LIBCANVAS_API FramedCurve : public PolyItem, public InterpolatedCurve +{ + public: + FramedCurve (Canvas*); + FramedCurve (Item*); + + enum CurveFill { + None, + Inside, + Outside, + }; + + void compute_bounding_box () const; + void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const; + void set (Points const &); + + void set_points_per_segment (uint32_t n); + + bool covers (Duple const &) const; + void set_fill_mode (CurveFill cf) { curve_fill = cf; } + + private: + Points samples; + Points::size_type n_samples; + uint32_t points_per_segment; + CurveFill curve_fill; + + void interpolate (); +}; + +} + +#endif |