numerictablewidgetitem.h

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#ifndef OPENSWMMVIS_NUMERICTABLEWIDGETITEM_H
#define OPENSWMMVIS_NUMERICTABLEWIDGETITEM_H
 
#include <QTableWidgetItem>
#include <cmath>
 
namespace openswmmvis::ui
{
 
// Preserve display formatting while ordering numeric cells by value.
class NumericTableWidgetItem : public QTableWidgetItem
{
public:
    using QTableWidgetItem::QTableWidgetItem;
    static constexpr int SortKeyRole = Qt::UserRole + 1;
    bool operator<(const QTableWidgetItem &other) const override
    {
        bool leftOk = false, rightOk = false;
        const QVariant leftKey = data(SortKeyRole);
        const QVariant rightKey = other.data(SortKeyRole);
        const double left = (leftKey.isValid() ? leftKey : QVariant(text())).toDouble(&leftOk);
        const double right =
            (rightKey.isValid() ? rightKey : QVariant(other.text())).toDouble(&rightOk);
        leftOk = leftOk && std::isfinite(left);
        rightOk = rightOk && std::isfinite(right);
        if (leftOk != rightOk)
            return leftOk;
        if (leftOk)
            return left < right;
        return QTableWidgetItem::operator<(other);
    }
};
 
} // namespace openswmmvis::ui
#endif