unitsystem.h

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#ifndef UNITSYSTEM_H
#define UNITSYSTEM_H
 
#include <QObject>
#include <QString>
 
#include <openswmm/legacy/engine/openswmm_solver.h>
#include <openswmm/engine/openswmm_model.h>
 
class UnitSystem : public QObject
{
    Q_OBJECT
 
public:
    explicit UnitSystem(QObject *parent = nullptr);
 
    // ---- Delegating facade ---------------------------------------------------
 
    static UnitSystem *instance();
 
    static void setActiveProject(UnitSystem *units);
 
    static UnitSystem *activeProject();
 
    // ---- Per-project state ---------------------------------------------------
 
    swmm_FlowUnitsProperty flowUnits() const;
 
    void syncFromEngine(SWMM_Engine engine);
 
    void setFlowUnits(swmm_FlowUnitsProperty units, SWMM_Engine engine = nullptr);
 
    bool    isSI()            const;
    QString flowUnitLabel()   const;  // "CFS", "CMS", …
    QString lengthLabel()     const;  // "ft" or "m"
    QString depthLabel()      const;  // "ft" or "m"
    QString velocityLabel()   const;  // "ft/s" or "m/s"
    QString areaLabel()       const;  // "ac" or "ha"
    QString volumeLabel()     const;  // "ft³" or "m³"
 
signals:
    void unitsChanged(swmm_FlowUnitsProperty newUnits);
 
private:
    swmm_FlowUnitsProperty mFlowUnits = swmm_CFS;
};
 
#endif // UNITSYSTEM_H