QString UnitsSchemaInternal::schemaTranslate(Base::Quantity quant)
{
    double UnitValue = quant.getValue();
	Unit unit = quant.getUnit();

	return QString::fromAscii("%1 %2").arg(UnitValue).arg(QString::fromAscii(unit.getString().c_str()));
}

QString UnitsSchemaImperialDecimal::schemaTranslate(Base::Quantity quant,double &factor,QString &unitString)
{
    double UnitValue = std::abs(quant.getValue());
    Unit unit = quant.getUnit();
    // for imperial user/programmer mind; UnitValue is in internal system, that means
    // mm/kg/s. And all combined units have to be calculated from there!

    // now do special treatment on all cases seems necessary:
    if(unit == Unit::Length){  // Length handling ============================
        if(UnitValue < 0.00000254){// smaller then 0.001 thou -> inch and scientific notation
            unitString = QString::fromLatin1("in");
            factor = 25.4;
        //}else if(UnitValue < 2.54){ // smaller then 0.1 inch -> Thou (mil)
        //    unitString = QString::fromLatin1("thou");
        //    factor = 0.0254;
        }else{ // bigger then 1000 mi -> scientific notation
            unitString = QString::fromLatin1("in");
            factor = 25.4;
        }
    }else if (unit == Unit::Area){
        // TODO Cascade for the Areas
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("in^2");
        factor = 645.16;
    }else if (unit == Unit::Volume){
        // TODO Cascade for the Volume
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("in^3");
        factor = 16387.064;
    }else if (unit == Unit::Mass){
        // TODO Cascade for the wights
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("lb");
        factor = 0.45359237;
    }else if (unit == Unit::Pressure){
        if(UnitValue < 145.038){// psi is the smallest
            unitString = QString::fromLatin1("psi");
            factor = 0.145038;
        //}else if(UnitValue < 145038){
        //    unitString = QString::fromLatin1("ksi");
        //    factor = 145.038;
        }else{ // bigger then 1000 ksi -> psi + scientific notation
            unitString = QString::fromLatin1("psi");
            factor = 0.145038;
        }
    }else{
        // default action for all cases without special treatment:
        unitString = quant.getUnit().getString();
        factor = 1.0;
    }
    //return QString::fromLatin1("%L1 %2").arg(quant.getValue() / factor).arg(unitString);
    QLocale Lc = QLocale::system();
    Lc.setNumberOptions(Lc.OmitGroupSeparator | Lc.RejectGroupSeparator);
    QString Ln = Lc.toString((quant.getValue() / factor), 'f', Base::UnitsApi::getDecimals());
    return QString::fromUtf8("%1 %2").arg(Ln).arg(unitString);
}

QString QuantitySpinBox::textFromValue(const Base::Quantity& value) const
{
    double factor;
    QString unitStr;
    QString str = value.getUserString(factor, unitStr);
    if (qAbs(value.getValue()) >= 1000.0) {
        str.remove(locale().groupSeparator());
    }
    return str;
}

/// sets the field with a quantity
void InputField::setValue(const Base::Quantity& quant)
{
    actQuantity = quant;
    if(!quant.getUnit().isEmpty())
        actUnit = quant.getUnit();

    double dFactor;
    setText(quant.getUserString(dFactor,actUnitStr));
    actUnitValue = quant.getValue()/dFactor;
}

void DlgExpressionInput::textChanged(const QString &text)
{
    try {
        //resize the input field according to text size
        QFontMetrics fm(ui->expression->font());
        int width = fm.width(text) + 15;
        if (width < minimumWidth)
            ui->expression->setMinimumWidth(minimumWidth);
        else
            ui->expression->setMinimumWidth(width);
        
        if(this->width() < ui->expression->minimumWidth())
            setMinimumWidth(ui->expression->minimumWidth());

        //now handle expression
        boost::shared_ptr<Expression> expr(ExpressionParser::parse(path.getDocumentObject(), text.toUtf8().constData()));

        if (expr) {
            std::string error = path.getDocumentObject()->ExpressionEngine.validateExpression(path, expr);

            if (error.size() > 0)
                throw Base::Exception(error.c_str());

            std::unique_ptr<Expression> result(expr->eval());

            expression = expr;
            ui->okBtn->setEnabled(true);
            ui->msg->clear();

            NumberExpression * n = Base::freecad_dynamic_cast<NumberExpression>(result.get());
            if (n) {
                Base::Quantity value = n->getQuantity();

                if (!value.getUnit().isEmpty() && value.getUnit() != impliedUnit)
                    throw Base::Exception("Unit mismatch between result and required unit");

                value.setUnit(impliedUnit);

                ui->msg->setText(value.getUserString());
            }
            else
                ui->msg->setText(Base::Tools::fromStdString(result->toString()));

            //set default palette as we may have read text right now
            ui->msg->setPalette(ui->okBtn->palette());
        }
    }
    catch (Base::Exception & e) {
        ui->msg->setText(QString::fromUtf8(e.what()));
        QPalette p(ui->msg->palette());
        p.setColor(QPalette::WindowText, Qt::red);
        ui->msg->setPalette(p);
        ui->okBtn->setDisabled(true);
    }
}

QString UnitsSchema::toLocale(const Base::Quantity& quant, double factor, const QString& unitString) const
{
    //return QString::fromUtf8("%L1 %2").arg(quant.getValue() / factor).arg(unitString);
    QLocale Lc = QLocale::system();
    const QuantityFormat& format = quant.getFormat();
    if (format.option != QuantityFormat::None) {
        uint opt = static_cast<uint>(format.option);
        Lc.setNumberOptions(static_cast<QLocale::NumberOptions>(opt));
    }

    QString Ln = Lc.toString((quant.getValue() / factor), format.toFormat(), format.precision);
    return QString::fromUtf8("%1 %2").arg(Ln, unitString);
}

bool PropertyConstraintListItem::event (QEvent* ev)
{
    if (ev->type() == QEvent::DynamicPropertyChange) {
        if (!blockEvent) {
            QDynamicPropertyChangeEvent* ce = static_cast<QDynamicPropertyChangeEvent*>(ev);
            // Get property via internal name of a PropertyUnit
            QVariant prop = property(ce->propertyName());
            QString propName = QString::fromLatin1(ce->propertyName());
            Base::Quantity quant = prop.value<Base::Quantity>();

            Sketcher::PropertyConstraintList* item;

            int id = 0;
            if (this->parent()->getTypeId() == SketcherGui::PropertyConstraintListItem::getClassTypeId()) {
                item = static_cast<Sketcher::PropertyConstraintList*>(this->parent()->getFirstProperty());
            }
            else {
                item = static_cast<Sketcher::PropertyConstraintList*>(getFirstProperty());
            }

            const std::vector< Sketcher::Constraint * > &vals = item->getValues();
            for (std::vector< Sketcher::Constraint* >::const_iterator it = vals.begin();it != vals.end(); ++it, ++id) {
                if ((*it)->Type == Sketcher::Distance || // Datum constraint
                    (*it)->Type == Sketcher::DistanceX ||
                    (*it)->Type == Sketcher::DistanceY ||
                    (*it)->Type == Sketcher::Radius ||
                    (*it)->Type == Sketcher::Angle ) {

                    // Get the internal name
                    QString internalName = QString::fromLatin1("Constraint%1").arg(id+1);
                    if (internalName == propName) {
                        double datum = quant.getValue();
                        if ((*it)->Type == Sketcher::Angle)
                            datum = Base::toRadians<double>(datum);
                        const_cast<Sketcher::Constraint *>((*it))->setValue(datum);
                        item->set1Value(id,(*it));
                        break;
                    }
                }
            }
        }
    }

    return PropertyItem::event(ev);
}

std::string  DrawViewDimension::getFormatedValue() const
{
    QString str = QString::fromUtf8(FormatSpec.getStrValue().c_str());
    double val = std::abs(getDimValue());
    //QLocale here(QLocale::German);                                           //for testing
    //here.setNumberOptions(QLocale::OmitGroupSeparator);
    QLocale here = QLocale();                                                  //system locale
    QString valText = here.toString(val, 'f',Precision.getValue());

    Base::Quantity qVal;
    qVal.setValue(val);
    if (Type.isValue("Angle")) {
        qVal.setUnit(Base::Unit::Angle);
    } else {
        qVal.setUnit(Base::Unit::Length);
    }
    QString userStr = qVal.getUserString();
    QStringList userSplit = userStr.split(QString::fromUtf8(" "),QString::SkipEmptyParts);   //break userString into number + UoM
    QString displayText;
    if (!userSplit.isEmpty()) {
       QString unitText = userSplit.back();
       displayText = valText + QString::fromUtf8(" ") + unitText;
    }

    QRegExp rx(QString::fromAscii("%(\\w+)%"));                        //any word bracketed by %
    QStringList list;
    int pos = 0;

    while ((pos = rx.indexIn(str, pos)) != -1) {
        list << rx.cap(0);
        pos += rx.matchedLength();
    }

    for(QStringList::const_iterator it = list.begin(); it != list.end(); ++it) {
        if(*it == QString::fromAscii("%value%")){
            str.replace(*it,displayText);
        } else {                                                       //insert additional placeholder replacement logic here
            str.replace(*it, QString::fromAscii(""));                  //maybe we should just leave what was there?
        }
    }
    return str.toStdString();
}

// Gets called after call of 'validateAndInterpret'
void QuantitySpinBox::userInput(const QString & text)
{
    Q_D(QuantitySpinBox);

    QString tmp = text;
    int pos = 0;
    QValidator::State state;
    Base::Quantity res = d->validateAndInterpret(tmp, pos, state);
    if (state == QValidator::Acceptable) {
        d->validInput = true;
        d->validStr = text;
    }
    else if (state == QValidator::Intermediate) {
        tmp = tmp.trimmed();
        tmp += QLatin1Char(' ');
        tmp += d->unitStr;
        Base::Quantity res2 = d->validateAndInterpret(tmp, pos, state);
        if (state == QValidator::Acceptable) {
            d->validInput = true;
            d->validStr = tmp;
            res = res2;
        }
        else {
            d->validInput = false;
            return;
        }
    }
    else {
        d->validInput = false;
        return;
    }

    double factor;
    res.getUserString(factor,d->unitStr);
    d->unitValue = res.getValue()/factor;
    d->quantity = res;

    // signaling
    valueChanged(res);
    valueChanged(res.getValue());
}

QString UnitsSchemaMKS::schemaTranslate(Base::Quantity quant,double &factor,QString &unitString)
{
    double UnitValue = std::abs(quant.getValue());
	Unit unit = quant.getUnit();

    // now do special treatment on all cases seams nececarry:
    if(unit == Unit::Length){  // Length handling ============================
        if(UnitValue < 0.000000001){// smaller then 0.001 nm -> scientific notation
            unitString = QString::fromLatin1("mm");
            factor = 1.0;
        }else if(UnitValue < 0.001){
            unitString = QString::fromLatin1("nm");
            factor = 0.000001;
        }else if(UnitValue < 0.1){
            unitString = QString::fromUtf8("\xC2\xB5m");
            factor = 0.001;
        }else if(UnitValue < 100.0){
            unitString = QString::fromLatin1("mm");
            factor = 1.0;
        }else if(UnitValue < 10000000.0){
            unitString = QString::fromLatin1("m");
            factor = 1000.0;
        }else if(UnitValue < 100000000000.0 ){
            unitString = QString::fromLatin1("km");
            factor = 1000000.0;
        }else{ // bigger then 1000 km -> scientific notation 
            unitString = QString::fromLatin1("mm");
            factor = 1.0;
        }
    }else if (unit == Unit::Area){
        // TODO Cascade for the Areas
        // default action for all cases without special treatment:
        unitString = quant.getUnit().getString();
        factor = 1.0;
    }else if (unit == Unit::Mass){
        // TODO Cascade for the wights
        // default action for all cases without special treatment:
        unitString = quant.getUnit().getString();
        factor = 1.0;
    }else if (unit == Unit::Pressure){
        if(UnitValue < 10.0){// Pa is the smallest
            unitString = QString::fromLatin1("Pa");
            factor = 0.001;
        }else if(UnitValue < 10000.0){
            unitString = QString::fromLatin1("kPa");
            factor = 1.0;
        }else if(UnitValue < 10000000.0){
            unitString = QString::fromLatin1("GPa");
            factor = 1000.0;
        }else{ // bigger then 1000 GPa -> scientific notation 
            unitString = QString::fromLatin1("Pa");
            factor = 1.0;
        }
    }else{
        // default action for all cases without special treatment:
        unitString = quant.getUnit().getString();
        factor = 1.0;
    }
	return QString::fromUtf8("%L1 %2").arg(quant.getValue() / factor).arg(unitString);
}

void QuantitySpinBox::setValue(const Base::Quantity& value)
{
    Q_D(QuantitySpinBox);
    d->quantity = value;
    // check limits
    if (d->quantity.getValue() > d->maximum)
        d->quantity.setValue(d->maximum);
    if (d->quantity.getValue() < d->minimum)
        d->quantity.setValue(d->minimum);

    d->unit = value.getUnit();

    updateText(value);
}

PyObject* SketchObjectPy::setDatum(PyObject *args)
{
    double Datum;
    int    Index;
    PyObject* object;
    Base::Quantity Quantity;
    if (PyArg_ParseTuple(args,"iO!", &Index, &(Base::QuantityPy::Type), &object)) {
        Quantity = *(static_cast<Base::QuantityPy*>(object)->getQuantityPtr());
        if (Quantity.getUnit() == Base::Unit::Angle)
            //Datum = Quantity.getValueAs(Base::Quantity::Radian);
            Datum = Base::toRadians<double>(Quantity.getValue());
        else
            Datum = Quantity.getValue();
    }
    else {
        PyErr_Clear();
        if (!PyArg_ParseTuple(args, "id", &Index, &Datum))
            return 0;
        Quantity.setValue(Datum);
    }

    int err=this->getSketchObjectPtr()->setDatum(Index, Datum);
    if (err) {
        std::stringstream str;
        if (err == -1)
            str << "Invalid constraint index: " << Index;
        else if (err == -3)
            str << "Cannot set the datum because the sketch contains conflicting constraints";
        else if (err == -2)
            str << "Datum " << (const char*)Quantity.getUserString().toUtf8() << " for the constraint with index " << Index << " is invalid";
        else if (err == -4)
            str << "Negative datum values are not valid for the constraint with index " << Index;
        else if (err == -5)
            str << "Zero is not a valid datum for the constraint with index " << Index;
        else
            str << "Unexpected problem at setting datum " << (const char*)Quantity.getUserString().toUtf8() << " for the constraint with index " << Index;
        PyErr_SetString(PyExc_ValueError, str.str().c_str());
        return 0;
    }

    Py_Return;
}

void TaskFemConstraintPressure::onPressureChanged(const Base::Quantity& f)
{
    Fem::ConstraintPressure* pcConstraint = static_cast<Fem::ConstraintPressure*>(ConstraintView->getObject());
    double val = f.getValueAs(Base::Quantity::MegaPascal);
    pcConstraint->Pressure.setValue(val);
}

PyObject* SketchObjectPy::getDatum(PyObject *args)
{
    const std::vector<Constraint*>& vals = this->getSketchObjectPtr()->Constraints.getValues();
    Constraint* constr = 0;

    do {
        int index = 0;
        if (PyArg_ParseTuple(args,"i", &index)) {
            if (index < 0 || index >= static_cast<int>(vals.size())) {
                PyErr_SetString(PyExc_IndexError, "index out of range");
                return 0;
            }

            constr = vals[index];
            break;
        }

        PyErr_Clear();
        char* name;
        if (PyArg_ParseTuple(args,"s", &name)) {
            int id = 0;
            for (std::vector<Constraint*>::const_iterator it = vals.begin(); it != vals.end(); ++it, ++id) {
                if (Sketcher::PropertyConstraintList::getConstraintName((*it)->Name, id) == name) {
                    constr = *it;
                    break;
                }
            }

            if (!constr) {
                std::stringstream str;
                str << "Invalid constraint name: '" << name << "'";
                PyErr_SetString(PyExc_NameError, str.str().c_str());
                return 0;
            }
            else {
                break;
            }
        }

        // error handling
        PyErr_SetString(PyExc_TypeError, "Wrong arguments");
        return 0;
    }
    while (false);

    ConstraintType type = constr->Type;
    if (type != Distance &&
        type != DistanceX &&
        type != DistanceY &&
        type != Radius &&
        type != Angle) {
        PyErr_SetString(PyExc_TypeError, "Constraint is not a datum");
        return 0;
    }

    Base::Quantity datum;
    datum.setValue(constr->getValue());
    if (type == Angle) {
        datum.setValue(Base::toDegrees<double>(datum.getValue()));
        datum.setUnit(Base::Unit::Angle);
    }
    else {
        datum.setUnit(Base::Unit::Length);
    }

    return new Base::QuantityPy(new Base::Quantity(datum));
}

PyObject* SketchObjectPy::setDatum(PyObject *args)
{
    double Datum;
    int    Index;
    PyObject* object;
    Base::Quantity Quantity;

    do {
        // handle (int,Quantity)
        if (PyArg_ParseTuple(args,"iO!", &Index, &(Base::QuantityPy::Type), &object)) {
            Quantity = *(static_cast<Base::QuantityPy*>(object)->getQuantityPtr());
            if (Quantity.getUnit() == Base::Unit::Angle) {
                Datum = Base::toRadians<double>(Quantity.getValue());
                break;
            }
            else {
                Datum = Quantity.getValue();
                break;
            }
        }

        // handle (int,double)
        PyErr_Clear();
        if (PyArg_ParseTuple(args, "id", &Index, &Datum)) {
            Quantity.setValue(Datum);
            break;
        }

        // handle (string,Quantity)
        char* constrName;
        PyErr_Clear();
        if (PyArg_ParseTuple(args,"sO!", &constrName, &(Base::QuantityPy::Type), &object)) {
            Quantity = *(static_cast<Base::QuantityPy*>(object)->getQuantityPtr());
            if (Quantity.getUnit() == Base::Unit::Angle) {
                Datum = Base::toRadians<double>(Quantity.getValue());
            }
            else {
                Datum = Quantity.getValue();
            }

            int i = 0;
            Index = -1;
            const std::vector<Constraint*>& vals = this->getSketchObjectPtr()->Constraints.getValues();
            for (std::vector<Constraint*>::const_iterator it = vals.begin(); it != vals.end(); ++it, ++i) {
                if ((*it)->Name == constrName) {
                    Index = i;
                    break;
                }
            }

            if (Index >= 0) {
                break;
            }
            else {
                std::stringstream str;
                str << "Invalid constraint name: '" << constrName << "'";
                PyErr_SetString(PyExc_ValueError, str.str().c_str());
                return 0;
            }
        }

        // handle (string,double)
        PyErr_Clear();
        if (PyArg_ParseTuple(args, "sd", &constrName, &Datum)) {
            Quantity.setValue(Datum);
            int i = 0;
            Index = -1;
            const std::vector<Constraint*>& vals = this->getSketchObjectPtr()->Constraints.getValues();
            for (std::vector<Constraint*>::const_iterator it = vals.begin(); it != vals.end(); ++it, ++i) {
                if ((*it)->Name == constrName) {
                    Index = i;
                    break;
                }
            }

            if (Index >= 0) {
                break;
            }
            else {
                std::stringstream str;
                str << "Invalid constraint name: '" << constrName << "'";
                PyErr_SetString(PyExc_ValueError, str.str().c_str());
                return 0;
            }
        }

        // error handling
        PyErr_SetString(PyExc_TypeError, "Wrong arguments");
        return 0;
    }
    while (false);

    int err=this->getSketchObjectPtr()->setDatum(Index, Datum);
    if (err) {
        std::stringstream str;
        if (err == -1)
            str << "Invalid constraint index: " << Index;
        else if (err == -3)
            str << "Cannot set the datum because the sketch contains conflicting constraints";
        else if (err == -2)
//.........这里部分代码省略.........

// constructor method
int ConstraintPy::PyInit(PyObject* args, PyObject* /*kwd*/)
{
    if (PyArg_ParseTuple(args, "")) {
        return 0;
    }

    PyErr_Clear();

    char *ConstraintType;
    int  FirstIndex = Constraint::GeoUndef;
    int  FirstPos   = none;
    int  SecondIndex= Constraint::GeoUndef;
    int  SecondPos  = none;
    int  ThirdIndex = Constraint::GeoUndef;
    int  ThirdPos   = none;
    double Value    = 0;
    int intArg1, intArg2, intArg3, intArg4, intArg5;
    // Note: In Python 2.x PyArg_ParseTuple prints a warning if a float is given but an integer is expected.
    // This means we must use a PyObject and check afterwards if it's a float or integer.
    PyObject* index_or_value;
    PyObject* oNumArg4;
    PyObject* oNumArg5;
    int any_index;

    // ConstraintType, GeoIndex
    if (PyArg_ParseTuple(args, "si", &ConstraintType, &FirstIndex)) {
        if (strcmp("Horizontal",ConstraintType) == 0) {
            this->getConstraintPtr()->Type = Horizontal;
            this->getConstraintPtr()->First = FirstIndex;
            return 0;
        }
        else if (strcmp("Vertical",ConstraintType) == 0) {
            this->getConstraintPtr()->Type = Vertical;
            this->getConstraintPtr()->First = FirstIndex;
            return 0;
        }
    }
    PyErr_Clear();

    if (PyArg_ParseTuple(args, "siO", &ConstraintType, &FirstIndex, &index_or_value)) {
        // ConstraintType, GeoIndex1, GeoIndex2
        if (PyInt_Check(index_or_value)) {
            SecondIndex = PyInt_AsLong(index_or_value);
            bool valid = false;
            if (strcmp("Tangent",ConstraintType) == 0) {
                this->getConstraintPtr()->Type = Tangent;
                valid = true;
            }
            else if (strcmp("Parallel",ConstraintType) == 0) {
                this->getConstraintPtr()->Type = Parallel;
                valid = true;
            }
            else if (strcmp("Perpendicular",ConstraintType) == 0) {
                this->getConstraintPtr()->Type = Perpendicular;
                valid = true;
            }
            else if (strcmp("Equal",ConstraintType) == 0) {
                this->getConstraintPtr()->Type = Equal;
                valid = true;
            }
            else if (strstr(ConstraintType,"InternalAlignment") != NULL) {
                this->getConstraintPtr()->Type = InternalAlignment;
                
                valid = true;
                if(strstr(ConstraintType,"EllipseMajorDiameter") != NULL)
                    this->getConstraintPtr()->AlignmentType=EllipseMajorDiameter;
                else if(strstr(ConstraintType,"EllipseMinorDiameter") != NULL)
                    this->getConstraintPtr()->AlignmentType=EllipseMinorDiameter;                    
                else {
                    this->getConstraintPtr()->AlignmentType=Undef;
                    valid = false;
                }
            }
            
            if (valid) {
                this->getConstraintPtr()->First = FirstIndex;
                this->getConstraintPtr()->Second = SecondIndex;
                return 0;
            }
        }
        // ConstraintType, GeoIndex, Value
        if (PyNumber_Check(index_or_value)) { // can be float or int
            Value = PyFloat_AsDouble(index_or_value);
            bool valid = false;
            if (strcmp("Distance",ConstraintType) == 0 ) {
                this->getConstraintPtr()->Type = Distance;
                valid = true;
            }
            else if (strcmp("Angle",ConstraintType) == 0 ) {
                if (PyObject_TypeCheck(index_or_value, &(Base::QuantityPy::Type))) {
                    Base::Quantity q = *(static_cast<Base::QuantityPy*>(index_or_value)->getQuantityPtr());
                    if (q.getUnit() == Base::Unit::Angle)
                        Value = q.getValueAs(Base::Quantity::Radian);
                }
                this->getConstraintPtr()->Type = Angle;
                valid = true;
            }
            else if (strcmp("DistanceX",ConstraintType) == 0) {
                this->getConstraintPtr()->Type = DistanceX;
//.........这里部分代码省略.........

void QuantitySpinBox::setUnitText(const QString& str)
{
    Base::Quantity quant = Base::Quantity::parse(str);
    setUnit(quant.getUnit());
}

double TaskFemConstraintPressure::getPressure(void) const
{
    Base::Quantity pressure =  ui->if_pressure->getQuantity();
    double pressure_in_MPa = pressure.getValueAs(Base::Quantity::MegaPascal);
    return pressure_in_MPa;
}

    Base::Quantity validateAndInterpret(QString& input, int& pos, QValidator::State& state) const
    {
        Base::Quantity res;
        const double max = this->maximum;
        const double min = this->minimum;

        QString copy = input;

        int len = copy.size();

        const bool plus = max >= 0;
        const bool minus = min <= 0;

        switch (len) {
        case 0:
            state = max != min ? QValidator::Intermediate : QValidator::Invalid;
            goto end;
        case 1:
            if (copy.at(0) == locale.decimalPoint()) {
                state = QValidator::Intermediate;
                copy.prepend(QLatin1Char('0'));
                pos++;
                len++;
                goto end;
            }
            else if (copy.at(0) == QLatin1Char('+')) {
                // the quantity parser doesn't allow numbers of the form '+1.0'
                state = QValidator::Invalid;
                goto end;
            }
            else if (copy.at(0) == QLatin1Char('-')) {
                if (minus)
                    state = QValidator::Intermediate;
                else
                    state = QValidator::Invalid;
                goto end;
            }
            break;
        case 2:
            if (copy.at(1) == locale.decimalPoint()
                    && (plus && copy.at(0) == QLatin1Char('+'))) {
                state = QValidator::Intermediate;
                goto end;
            }
            if (copy.at(1) == locale.decimalPoint()
                    && (minus && copy.at(0) == QLatin1Char('-'))) {
                state = QValidator::Intermediate;
                copy.insert(1, QLatin1Char('0'));
                pos++;
                len++;
                goto end;
            }
            break;
        default:
            break;
        }

        {
            if (copy.at(0) == locale.groupSeparator()) {
                state = QValidator::Invalid;
                goto end;
            }
            else if (len > 1) {
                const int dec = copy.indexOf(locale.decimalPoint());
                if (dec != -1) {
                    if (dec + 1 < copy.size() && copy.at(dec + 1) == locale.decimalPoint() && pos == dec + 1) {
                        copy.remove(dec + 1, 1);
                    }
                    else if (copy.indexOf(locale.decimalPoint(), dec + 1) != -1) {
                        // trying to add a second decimal point is not allowed
                        state = QValidator::Invalid;
                        goto end;
                    }
                    for (int i=dec + 1; i<copy.size(); ++i) {
                        // a group separator after the decimal point is not allowed
                        if (copy.at(i) == locale.groupSeparator()) {
                            state = QValidator::Invalid;
                            goto end;
                        }
                    }
                }
            }

            bool ok = false;
            double value = min;

            if (locale.negativeSign() != QLatin1Char('-'))
                copy.replace(locale.negativeSign(), QLatin1Char('-'));
            if (locale.positiveSign() != QLatin1Char('+'))
                copy.replace(locale.positiveSign(), QLatin1Char('+'));

            try {
                QString copy2 = copy;
                copy2.remove(locale.groupSeparator());

                res = Base::Quantity::parse(copy2);
                value = res.getValue();
                ok = true;
            }
            catch (Base::Exception&) {
//.........这里部分代码省略.........

QString UnitsSchemaImperialDecimal::schemaTranslate(const Base::Quantity& quant, double &factor, QString &unitString)
{
    double UnitValue = std::abs(quant.getValue());
    Unit unit = quant.getUnit();
    // for imperial user/programmer mind; UnitValue is in internal system, that means
    // mm/kg/s. And all combined units have to be calculated from there!

    // now do special treatment on all cases seems necessary:
    if (unit == Unit::Length) {  // Length handling ============================
        if (UnitValue < 0.00000254) {// smaller then 0.001 thou -> inch and scientific notation
            unitString = QString::fromLatin1("in");
            factor = 25.4;
        //}else if(UnitValue < 2.54){ // smaller then 0.1 inch -> Thou (mil)
        //    unitString = QString::fromLatin1("thou");
        //    factor = 0.0254;
        }
        else { // bigger then 1000 mi -> scientific notation
            unitString = QString::fromLatin1("in");
            factor = 25.4;
        }
    }
    else if (unit == Unit::Area) {
        // TODO Cascade for the Areas
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("in^2");
        factor = 645.16;
    }
    else if (unit == Unit::Volume) {
        // TODO Cascade for the Volume
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("in^3");
        factor = 16387.064;
    }
    else if (unit == Unit::Mass) {
        // TODO Cascade for the weights
        // default action for all cases without special treatment:
        unitString = QString::fromLatin1("lb");
        factor = 0.45359237;
    }
    else if (unit == Unit::Pressure) {
        if (UnitValue < 6894.744) {// psi is the smallest
            unitString = QString::fromLatin1("psi");
            factor = 6.894744825494;
        }
        else { // bigger then 1000 ksi -> psi + scientific notation
            unitString = QString::fromLatin1("psi");
            factor = 6.894744825494;
        }
    }
    else if (unit == Unit::Velocity) {
        unitString = QString::fromLatin1("in/min");
        factor = 25.4/60;
    }
    else {
        // default action for all cases without special treatment:
        unitString = quant.getUnit().getString();
        factor = 1.0;
    }

    return toLocale(quant, factor, unitString);
}