diff options
Diffstat (limited to 'src/gui/util/qvalidator.cpp')
| -rw-r--r-- | src/gui/util/qvalidator.cpp | 159 |
1 files changed, 156 insertions, 3 deletions
diff --git a/src/gui/util/qvalidator.cpp b/src/gui/util/qvalidator.cpp index b94ec7f1bb..ed3b3b6dd6 100644 --- a/src/gui/util/qvalidator.cpp +++ b/src/gui/util/qvalidator.cpp @@ -1,6 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2012 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtGui module of the Qt Toolkit. @@ -501,9 +502,6 @@ void QIntValidator::setTop(int top) setRange(bottom(), top); } - -#ifndef QT_NO_REGEXP - /*! \internal */ @@ -520,6 +518,8 @@ QValidator::QValidator(QValidatorPrivate &d, QObject *parent) { } +#ifndef QT_NO_REGEXP + class QDoubleValidatorPrivate : public QValidatorPrivate { Q_DECLARE_PUBLIC(QDoubleValidator) @@ -906,6 +906,159 @@ void QRegExpValidator::setRegExp(const QRegExp& rx) #endif +#ifndef QT_NO_REGULAREXPRESSION + +/*! + \class QRegularExpressionValidator + \brief The QRegularExpressionValidator class is used to check a string + against a regular expression. + + \since 5.1 + + QRegularExpressionValidator uses a regular expression (regexp) to + determine whether an input string is \l Acceptable, \l + Intermediate, or \l Invalid. The regexp can either be supplied + when the QRegularExpressionValidator is constructed, or at a later time. + + If the regexp partially matches against the string, the result is + considered \l Intermediate. For example, "" and "A" are \l Intermediate for + the regexp \b{[A-Z][0-9]} (whereas "_" would be \l Invalid). + + QRegularExpressionValidator automatically wraps the regular expression in + the \c{\\A} and \c{\\z} anchors; in other words, it always attempts to do + an exact match. + + Example of use: + \snippet code/src_gui_util_qvalidator.cpp 5 + + Below we present some examples of validators. In practice they would + normally be associated with a widget as in the example above. + + \snippet code/src_gui_util_qvalidator.cpp 6 + + \sa QRegularExpression, QIntValidator, QDoubleValidator, QRegExpValidator +*/ + +class QRegularExpressionValidatorPrivate : public QValidatorPrivate +{ + Q_DECLARE_PUBLIC(QRegularExpressionValidator) + +public: + QRegularExpression origRe; // the one set by the user + QRegularExpression usedRe; // the one actually used + void setRegularExpression(const QRegularExpression &re); +}; + +/*! + Constructs a validator with a \a parent object that accepts + any string (including an empty one) as valid. +*/ + +QRegularExpressionValidator::QRegularExpressionValidator(QObject *parent) + : QValidator(*new QRegularExpressionValidatorPrivate, parent) +{ + // origRe in the private will be an empty QRegularExpression, + // and therefore this validator will match any string. +} + +/*! + Constructs a validator with a \a parent object that + accepts all strings that match the regular expression \a re. +*/ + +QRegularExpressionValidator::QRegularExpressionValidator(const QRegularExpression &re, QObject *parent) + : QValidator(*new QRegularExpressionValidatorPrivate, parent) +{ + Q_D(QRegularExpressionValidator); + d->setRegularExpression(re); +} + + +/*! + Destroys the validator. +*/ + +QRegularExpressionValidator::~QRegularExpressionValidator() +{ +} + +/*! + Returns \l Acceptable if \a input is matched by the regular expression for + this validator, \l Intermediate if it has matched partially (i.e. could be + a valid match if additional valid characters are added), and \l Invalid if + \a input is not matched. + + In case the \a input is not matched, the \a pos parameter is set to + the length of the \a input parameter; otherwise, it is not modified. + + For example, if the regular expression is \b{\\w\\d\\d} (word-character, + digit, digit) then "A57" is \l Acceptable, "E5" is \l Intermediate, and + "+9" is \l Invalid. + + \sa QRegularExpression::match() +*/ + +QValidator::State QRegularExpressionValidator::validate(QString &input, int &pos) const +{ + Q_D(const QRegularExpressionValidator); + + // We want a validator with an empty QRegularExpression to match anything; + // since we're going to do an exact match (by using d->usedRe), first check if the rx is empty + // (and, if so, accept the input). + if (d->origRe.pattern().isEmpty()) + return Acceptable; + + const QRegularExpressionMatch m = d->usedRe.match(input, 0, QRegularExpression::PartialPreferCompleteMatch); + if (m.hasMatch()) { + return Acceptable; + } else if (m.hasPartialMatch()) { + return Intermediate; + } else { + pos = input.size(); + return Invalid; + } +} + +/*! + \property QRegularExpressionValidator::regularExpression + \brief the regular expression used for validation + + By default, this property contains a regular expression with an empty + pattern (which therefore matches any string). +*/ + +QRegularExpression QRegularExpressionValidator::regularExpression() const +{ + Q_D(const QRegularExpressionValidator); + return d->origRe; +} + +void QRegularExpressionValidator::setRegularExpression(const QRegularExpression &re) +{ + Q_D(QRegularExpressionValidator); + d->setRegularExpression(re); +} + +/*! + \internal + + Sets \a re as the regular expression. It wraps the regexp that's actually used + between \\A and \\z, therefore forcing an exact match. +*/ +void QRegularExpressionValidatorPrivate::setRegularExpression(const QRegularExpression &re) +{ + Q_Q(QRegularExpressionValidator); + + if (origRe != re) { + usedRe = origRe = re; // copies also the pattern options + usedRe.setPattern(QStringLiteral("\\A(?:") + re.pattern() + QStringLiteral(")\\z")); + emit q->regularExpressionChanged(re); + emit q->changed(); + } +} + +#endif // QT_NO_REGULAREXPRESSION + QT_END_NAMESPACE #endif // QT_NO_VALIDATOR |