comparison layer/ColourMapper.h @ 196:22c99c8aa1e0

* Add separate colour mapping unit; use it in spectrogram (colour 3d plot to follow)
* Add another colour scheme resembling that of a noted commercial application

+/* -*- 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 _COLOUR_MAPPER_H_
+#define _COLOUR_MAPPER_H_
+
+#include <QObject>
+#include <QColor>
+#include <QString>
+
+/**
+ * A class for mapping intensity values onto various colour maps.
+ */
+
+class ColourMapper : public QObject
+{
+public:
+    ColourMapper(int map, float minValue, float maxValue);
+    virtual ~ColourMapper();
+
+    enum StandardMap {
+        DefaultColours,
+        Sunset,
+        WhiteOnBlack,
+        BlackOnWhite,
+        RedOnBlue,
+        YellowOnBlack,
+        BlueOnBlack,
+        FruitSalad
+    };
+
+    int getMap() const { return m_map; }
+    float getMinValue() const { return m_min; }
+    float getMaxValue() const { return m_max; }
+
+    static int getColourMapCount();
+    static QString getColourMapName(int n);
+
+    QColor map(float value) const;
+
+    QColor getContrastingColour() const; // for cursors etc
+
+protected:
+    int m_map;
+    float m_min;
+    float m_max;
+};
+
+#endif
+