Mercurial > hg > svgui
diff layer/HorizontalScaleProvider.h @ 1276:b4cb11ca8233 horizontal-scale
Branch toward adding horizontal numerical scales to things
author | Chris Cannam |
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date | Tue, 01 May 2018 16:14:22 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/layer/HorizontalScaleProvider.h Tue May 01 16:14:22 2018 +0100 @@ -0,0 +1,38 @@ +/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ + +/* + Sonic Visualiser + An audio file viewer and annotation editor. + Centre for Digital Music, Queen Mary, University of London. + This file copyright 2006-2018 Chris Cannam and QMUL. + + 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. See the file + COPYING included with this distribution for more information. +*/ + +#ifndef SV_HORIZONTAL_SCALE_PROVIDER_H +#define SV_HORIZONTAL_SCALE_PROVIDER_H + +class LayerGeometryProvider; + +/** + * Interface to be implemented by objects, such as layers or objects + * they delegate to, in which the X axis corresponds to frequency. For + * example, SpectrumLayer. + */ +class HorizontalScaleProvider +{ +public: + virtual double getFrequencyForX(const LayerGeometryProvider *, + double x) + const = 0; + + virtual double getXForFrequency(const LayerGeometryProvider *, + double freq) + const = 0; +}; + +#endif