palettedrasterrenderer.h

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#ifndef OPENSWMM_RENDER_PALETTEDRASTERRENDERER_H
#define OPENSWMM_RENDER_PALETTEDRASTERRENDERER_H
 
#include "render/irasterrenderer.h"
 
#include <QColor>
#include <QHash>
#include <QList>
#include <QString>
 
namespace OpenSWMM::Render
{
 
class PalettedRasterRenderer final : public IRasterRenderer
{
public:
    struct Class
    {
        int     value = 0;     
        QString label;         
        QColor  color;         
    };
 
    PalettedRasterRenderer() = default;
    ~PalettedRasterRenderer() override = default;
 
    [[nodiscard]] const QList<Class> &classes() const { return m_classes; }
    void setClasses(QList<Class> classes);
 
    [[nodiscard]] QString paletteName() const { return m_paletteName; }
    void setPaletteName(QString name);
 
    void buildClassesFromValues(const QList<int> &uniqueValues);
 
    // IRasterRenderer.
    [[nodiscard]] QString rendererId() const override
    {
        return QStringLiteral("palettedraster");
    }
    [[nodiscard]] QColor colorForValue(double value,
                                       bool isNoData = false) const override;
    [[nodiscard]] QList<LegendSymbolItem> legendSymbolItems() const override;
    [[nodiscard]] QJsonObject toJson() const override;
    void fromJson(const QJsonObject &j) override;
    [[nodiscard]] std::unique_ptr<IRasterRenderer> clone() const override;
 
private:
    [[nodiscard]] QColor paletteColor(int index) const;
    void rebuildIndex();
 
    QList<Class>      m_classes;
    QHash<int, int>   m_valueToIndex;   
    QString           m_paletteName = QStringLiteral("Tab10");
};
 
} // namespace OpenSWMM::Render
 
#endif // OPENSWMM_RENDER_PALETTEDRASTERRENDERER_H