measurementunitmanager.h

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#ifndef MEASUREMENTUNITMANAGER_H
#define MEASUREMENTUNITMANAGER_H
 
#include <QObject>
#include <QString>
#include <QStringList>
 
class MeasurementUnitManager : public QObject
{
    Q_OBJECT
 
public:
 
    // ----- Distance units ------------------------------------------------
 
    enum DistanceUnit
    {
        Metres,
        Kilometres,
        Feet,
        USFeet,           
        Miles,
        NauticalMiles,
        Yards,
        InternationalInches,
    };
 
    [[nodiscard]] static double metresTo(DistanceUnit unit);
 
    [[nodiscard]] static double toMetres(double value, DistanceUnit unit);
 
    [[nodiscard]] static double convert(double value, DistanceUnit from, DistanceUnit to);
 
    [[nodiscard]] static QString distanceUnitSymbol(DistanceUnit unit);
 
    [[nodiscard]] static QString distanceUnitName(DistanceUnit unit);
 
    [[nodiscard]] static QStringList distanceUnitNames();
 
    // ----- Area units ----------------------------------------------------
 
    enum AreaUnit
    {
        SquareMetres,
        SquareKilometres,
        Hectares,
        Acres,
        SquareFeet,
        SquareMiles,
        SquareYards,
    };
 
    [[nodiscard]] static double squareMetresTo(AreaUnit unit);
 
    [[nodiscard]] static double toSquareMetres(double value, AreaUnit unit);
 
    [[nodiscard]] static double convertArea(double value, AreaUnit from, AreaUnit to);
 
    [[nodiscard]] static QString areaUnitSymbol(AreaUnit unit);
 
    [[nodiscard]] static QString areaUnitName(AreaUnit unit);
 
    [[nodiscard]] static QStringList areaUnitNames();
 
    // ----- Formatting helpers --------------------------------------------
 
    [[nodiscard]] static QString formatDistance(double metres,
                                                DistanceUnit preferredUnit = Metres,
                                                int decimals = 3);
 
    [[nodiscard]] static QString formatArea(double squareMetres,
                                            AreaUnit preferredUnit = SquareMetres,
                                            int decimals = 3);
};
 
#endif // MEASUREMENTUNITMANAGER_H