unitmodel.h

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#ifndef UNITMODEL_H
#define UNITMODEL_H

#include "database.h"

class ConvertableUnitModel : public SqlQueryModel {
public:
    enum Fields {
        UnitToId = Qt::UserRole + 900,
        UnitToSymbol,
        UnitFromId,
        UnitFromSymbol
    };

    enum ConstraintKind { //moet eenduiding een sens_id specifieren!!
        ConstraintKindTreeId
    };

    ConvertableUnitModel(QObject *parent = 0);
    QVariant data(const QModelIndex &index, int role) const;
    QVariant currentConstraintUnitId() const;
    void setConstraint(const int &id, const ConvertableUnitModel::ConstraintKind &kind,
                       const bool &constrainUnitTo = true, const bool &showUnitFrom = true,
                       const bool &calibrationUnit = false);
    void unconstrain();
    bool isUnitToConstrained();
    bool isUnitFromConstrained();

private:
    QString defaultQuery;
    bool constrained;
    bool constrainedUnitTo;
};

#endif // UNITMODEL_H