view layer/ColourMapper.h @ 1269:f2894944c6b8

Make the overlays at either end translucent, so they don't completely crop out any underlying text or necessary info (e.g. selection extents)
author Chris Cannam
date Thu, 19 Apr 2018 14:35:59 +0100
parents 73d43e410a6b
children 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, double minValue, double maxValue);
    ~ColourMapper();

    ColourMapper(const ColourMapper &) = default;
    ColourMapper &operator=(const ColourMapper &) = default;

    enum StandardMap {
        Green,
        Sunset,
        WhiteOnBlack,
        BlackOnWhite,
        Cherry,
        Wasp,
        Ice,
        FruitSalad,
        Banded,
        Highlight,
        Printer,
        HighGain
    };

    int getMap() const { return m_map; }
    double getMinValue() const { return m_min; }
    double getMaxValue() const { return m_max; }

    static int getColourMapCount();
    static QString getColourMapName(int n);

    QColor map(double value) const;

    QColor getContrastingColour() const; // for cursors etc
    bool hasLightBackground() const;

    QPixmap getExamplePixmap(QSize size) const;
    
protected:
    int m_map;
    double m_min;
    double m_max;
};

#endif