QIntValidator for unsigned long values

Hello,
I need to have a Qlineedit which must accept only integer values from 0 to 2^32. I am trying to do it with the QIntValidator, setting 0 and UINT_MAX as limits, but if I do it like this it doesn't accept values higher than 9.
Has anyone ever managed to make it work or should I look somewhere else (e.g. Regular Expressions)?Thank you in advance

@p_Each
Can't useUINT_MAX
for a (signed)int
/int32
. There is noQUintValidator
. You sure you can't manage with range to2 ^ 31  1
(INT_MAX
)? If not, I think you'll find it essentially impossible to write a (reasonable) regular expression for this, so write your own deriving fromQValidator
, inspired byQIntValidator
but allowing unsigned?doesn't accept values higher than 9.
BTW: unless it's to do with your upper bound being treated as negative (which it may be), this sounds more like
QValidator::Intermediate
result thanQValidator::Invalid
. Just be aware this is how QtQValidator
s work.

class UIntValidator : public QValidator { Q_OBJECT public: UIntValidator(quint32 minimum, quint32 maximum, QObject *parent = nullptr) : QValidator(parent) , m_min(minimum) , m_max(maximum) {} UIntValidator(QObject *parent = nullptr) : UIntValidator(std::numeric_limits<quint32>::min(),std::numeric_limits<quint32>::max(),parent) {} quint32 bottom() const { return m_min; } quint32 top() const { return m_max; } void setBottom(quint32 minimum){ if(m_min==minimum) return; m_min=minimum; changed(); } void setTop(quint32 maximum){ if(m_max==maximum) return; m_max=maximum; changed(); } void setRange(quint32 minimum, quint32 maximum){ setBottom(minimum); setTop(maximum) } QValidator::State validate(QString &input, int&) const override{ bool convertOk=false; quint32 numInput = input.toUInt(&convertOk); if(!convertOk) return QValidator::Invalid; if(numInput<m_min) return QValidator::Intermediate; if(numInput>m_max) return QValidator::Invalid; return QValidator::Acceptable; } private: quint32 m_min; quint32 m_max; };

@VRonin
You are too kind to write the code! :)

@JonB thanks, I suspected it but I still wanted to check. The max value needs to be 2^321, so I guess I will try extending QIntValidator

@VRonin I can't express how grateful I am for this. I think there's a typo in the validate function (the condition of the third if statement should be numInput > m_max), but otherwise it worked. Thanks!