Mercurial > hg > svgui
view layer/VerticalBinLayer.h @ 1402:b0eeec95ab5b
Handle integer pixel scaling as well
author | Chris Cannam |
---|---|
date | Thu, 15 Nov 2018 14:18:26 +0000 |
parents | 261a00010918 |
children | 4eafe5a1b655 |
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/* -*- 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 2006-2016 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 VERTICAL_BIN_LAYER_H #define VERTICAL_BIN_LAYER_H #include "SliceableLayer.h" /** * Interface for layers in which the Y axis corresponds to bin number * rather than scale value. Colour3DPlotLayer is the obvious example. * Conceptually these are always SliceableLayers as well, and this * subclasses from SliceableLayer to avoid a big inheritance mess. */ class VerticalBinLayer : public SliceableLayer { public: /** * Return the y coordinate at which the given bin "starts" * (i.e. at the bottom of the bin, if the given bin is an integer * and the vertical scale is the usual way up). Bin number may be * fractional, to obtain a position part-way through a bin. */ virtual double getYForBin(const LayerGeometryProvider *, double bin) const = 0; /** * As getYForBin, but rounding to integer values. */ virtual int getIYForBin(const LayerGeometryProvider *v, int bin) const { return int(round(getYForBin(v, bin))); } /** * Return the bin number, possibly fractional, at the given y * coordinate. Note that the whole numbers occur at the positions * at which the bins "start" (i.e. the bottom of the visible bin, * if the vertical scale is the usual way up). */ virtual double getBinForY(const LayerGeometryProvider *, double y) const = 0; /** * As getBinForY, but rounding to integer values. */ virtual int getIBinForY(const LayerGeometryProvider *v, int y) const { return int(floor(getBinForY(v, y))); } }; #endif