annotate layer/SingleColourLayer.h @ 1534:bfd8b22fd67c

Fix #1904 Scrolling colour 3d plot does not always work when in View normalisation mode. We shouldn't imagine we've just invalidated the cache if the truth is that we've only just created the renderer

/* -*- 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 2007 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_SINGLE_COLOUR_LAYER_H
#define SV_SINGLE_COLOUR_LAYER_H

#include "Layer.h"
#include <QColor>
#include <vector>
#include <map>

class SingleColourLayer : public Layer
{
    Q_OBJECT
    
public:
    /**
     * Set the colour used to draw primary items in the layer. The
     * colour value is a colour database index as returned by
     * ColourDatabase::getColourIndex().
     */
    virtual void setBaseColour(int);

    /**
     * Retrieve the current primary drawing colour, as a
     * ColourDatabase index value.
     */
    virtual int getBaseColour() const;

    /**
     * Return true if the layer currently has a dark colour on a light
     * background, false if it has a light colour on a dark
     * background.
     */
    bool hasLightBackground() const override;

    /**
     * Implements Layer::getLayerColourSignificance()
     */
    ColourSignificance getLayerColourSignificance() const override {
        return ColourDistinguishes;
    }

    QPixmap getLayerPresentationPixmap(QSize size) const override;

    PropertyList getProperties() const override;
    QString getPropertyLabel(const PropertyName &) const override;
    PropertyType getPropertyType(const PropertyName &) const override;
    QString getPropertyGroupName(const PropertyName &) const override;
    int getPropertyRangeAndValue(const PropertyName &,
                                         int *min, int *max, int *deflt) const override;
    QString getPropertyValueLabel(const PropertyName &,
                                          int value) const override;
    RangeMapper *getNewPropertyRangeMapper(const PropertyName &) const override;
    void setProperty(const PropertyName &, int value) override;

    void toXml(QTextStream &stream, QString indent = "",
                       QString extraAttributes = "") const override;

    void setProperties(const QXmlAttributes &attributes) override;

    virtual void setDefaultColourFor(LayerGeometryProvider *v);

protected:
    SingleColourLayer();
    virtual ~SingleColourLayer();

    virtual QColor getBaseQColor() const;
    virtual QColor getBackgroundQColor(LayerGeometryProvider *v) const;
    virtual QColor getForegroundQColor(LayerGeometryProvider *v) const;
    std::vector<QColor> getPartialShades(LayerGeometryProvider *v) const;

    virtual void flagBaseColourChanged() { }
    virtual int getDefaultColourHint(bool /* darkBackground */,
                                     bool & /* impose */) { return -1; }

    typedef std::map<int, int> ColourRefCount;
    static ColourRefCount m_colourRefCount;

    int m_colour;
    bool m_colourExplicitlySet;
    bool m_defaultColourSet;

private:
    void refColor();
    void unrefColor();
};

#endif