QLineEdit validator for IP and Port

validator.h

class MyIPValidator : public QRegularExpressionValidator
{
	// https://www.qtcentre.org/threads/6228-Ip-Address-Validation
public:
	MyIPValidator(const QString& defaultString, QObject* parent = Q_NULLPTR)
		: QRegularExpressionValidator(
		QRegularExpression("^0*(2(5[0-5]|[0-4]\\d)|1?\\d{1,2})(\\.0*(2(5[0-5]|[0-4]\\d)|1?\\d{1,2})){3}$"), parent)
		, m_defaultString(defaultString)
	{}

	void fixup(QString& t) const override { t = m_defaultString; }

protected:
	const QString m_defaultString;
};

class MyPortValidator : public QRegularExpressionValidator
{
public:
	MyPortValidator(const QString& defaultString, QObject* parent = Q_NULLPTR)
		: QRegularExpressionValidator(
		QRegularExpression("^()([1-9]|[1-5]?[0-9]{2,4}|6[1-4][0-9]{3}|65[1-4][0-9]{2}|655[1-2][0-9]|6553[1-5])$"),
		parent)
		, m_defaultString(defaultString)
	{}

	void fixup(QString& t) const override { t = m_defaultString; }

protected:
	const QString m_defaultString;
};