Mercurial > hg > svgui
view layer/ColourMapper.h @ 1428:c9fa16e41664 single-point
Update RegionLayer to updated RegionModel
author | Chris Cannam |
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date | Fri, 15 Mar 2019 14:24:22 +0000 |
parents | d79e21855aef |
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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 2006-2007 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_COLOUR_MAPPER_H #define SV_COLOUR_MAPPER_H #include <QObject> #include <QColor> #include <QString> #include <QPixmap> /** * A class for mapping intensity values onto various colour maps. */ class ColourMapper { public: ColourMapper(int map, bool inverted, double minValue, double maxValue); ~ColourMapper(); ColourMapper(const ColourMapper &) =default; ColourMapper &operator=(const ColourMapper &) =default; enum ColourMap { Green, Sunset, WhiteOnBlack, BlackOnWhite, Cherry, Wasp, Ice, FruitSalad, Banded, Highlight, Printer, HighGain, BlueOnBlack, Cividis, Magma }; int getMap() const { return m_map; } bool isInverted() const { return m_inverted; } double getMinValue() const { return m_min; } double getMaxValue() const { return m_max; } /** * Return the number of known colour maps. */ static int getColourMapCount(); /** * Return a human-readable label for the colour map with the given * index. This may have been subject to translation. */ static QString getColourMapLabel(int n); /** * Return a machine-readable id string for the colour map with the * given index. This is not translated and is intended for use in * file I/O. */ static QString getColourMapId(int n); /** * Return the index for the colour map with the given * machine-readable id string, or -1 if the id is not recognised. */ static int getColourMapById(QString id); /** * Older versions of colour-handling code save and reload colour * maps by numerical index and can't properly handle situations in * which the index order changes between releases, or new indices * are added. So when we save a colour map by id, we should also * save a compatibility value that can be re-read by such * code. This value is an index into the series of colours used by * pre-3.2 SV code, namely (Default/Green, Sunset, WhiteOnBlack, * BlackOnWhite, RedOnBlue, YellowOnBlack, BlueOnBlack, * FruitSalad, Banded, Highlight, Printer, HighGain). It should * represent the closest equivalent to the current colour scheme * available in that set. This function returns that index. */ static int getBackwardCompatibilityColourMap(int n); /** * Map the given value to a colour. The value will be clamped to * the range minValue to maxValue (where both are drawn from the * constructor arguments). */ QColor map(double value) const; /** * Return a colour that contrasts somewhat with the colours in the * map, so as to be used for cursors etc. */ QColor getContrastingColour() const; /** * Return true if the colour map is intended to be placed over a * light background, false otherwise. This is typically true if * the colours corresponding to higher values are darker than * those corresponding to lower values. */ bool hasLightBackground() const; /** * Return a pixmap of the given size containing a preview swatch * for the colour map. */ QPixmap getExamplePixmap(QSize size) const; protected: int m_map; bool m_inverted; double m_min; double m_max; }; #endif