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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qdebug.h>
+
+#include "qvalidator.h"
+#ifndef QT_NO_VALIDATOR
+#include "private/qobject_p.h"
+#include "private/qlocale_p.h"
+
+#include <limits.h>
+#include <math.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QValidator
+    \brief The QValidator class provides validation of input text.
+
+    \ingroup misc
+    \mainclass
+
+    The class itself is abstract. Two subclasses, \l QIntValidator and
+    \l QDoubleValidator, provide basic numeric-range checking, and \l
+    QRegExpValidator provides general checking using a custom regular
+    expression.
+
+    If the built-in validators aren't sufficient, you can subclass
+    QValidator. The class has two virtual functions: validate() and
+    fixup().
+
+    \l validate() must be implemented by every subclass. It returns
+    \l Invalid, \l Intermediate or \l Acceptable depending on whether
+    its argument is valid (for the subclass's definition of valid).
+
+    These three states require some explanation. An \l Invalid string
+    is \e clearly invalid. \l Intermediate is less obvious: the
+    concept of validity is difficult to apply when the string is
+    incomplete (still being edited). QValidator defines \l Intermediate
+    as the property of a string that is neither clearly invalid nor
+    acceptable as a final result. \l Acceptable means that the string
+    is acceptable as a final result. One might say that any string
+    that is a plausible intermediate state during entry of an \l
+    Acceptable string is \l Intermediate.
+
+    Here are some examples:
+
+    \list
+
+    \i For a line edit that accepts integers from 10 to 1000 inclusive,
+    42 and 123 are \l Acceptable, the empty string and 5 are \l
+    Intermediate, and "asdf" and 1114 is \l Invalid.
+
+    \i For an editable combobox that accepts URLs, any well-formed URL
+    is \l Acceptable, "http://qtsoftware.com/," is \l Intermediate
+    (it might be a cut and paste action that accidentally took in a
+    comma at the end), the empty string is \l Intermediate (the user
+    might select and delete all of the text in preparation for entering
+    a new URL) and "http:///./" is \l Invalid.
+
+    \i For a spin box that accepts lengths, "11cm" and "1in" are \l
+    Acceptable, "11" and the empty string are \l Intermediate, and
+    "http://qtsoftware.com" and "hour" are \l Invalid.
+
+    \endlist
+
+    \l fixup() is provided for validators that can repair some user
+    errors. The default implementation does nothing. QLineEdit, for
+    example, will call fixup() if the user presses Enter (or Return)
+    and the content is not currently valid. This allows the fixup()
+    function the opportunity of performing some magic to make an \l
+    Invalid string \l Acceptable.
+
+    A validator has a locale, set with setLocale(). It is typically used
+    to parse localized data. For example, QIntValidator and QDoubleValidator
+    use it to parse localized representations of integers and doubles.
+
+    QValidator is typically used with QLineEdit, QSpinBox and
+    QComboBox.
+
+    \sa QIntValidator, QDoubleValidator, QRegExpValidator, {Line Edits Example}
+*/
+
+
+/*!
+    \enum QValidator::State
+
+    This enum type defines the states in which a validated string can
+    exist.
+
+    \value Invalid       The string is \e clearly invalid.
+    \value Intermediate  The string is a plausible intermediate value.
+    \value Acceptable    The string is acceptable as a final result;
+                         i.e. it is valid.
+
+    \omitvalue Valid
+*/
+
+class QValidatorPrivate : public QObjectPrivate{
+    Q_DECLARE_PUBLIC(QValidator)
+public:
+    QValidatorPrivate() : QObjectPrivate()
+    {
+    }
+
+    QLocale locale;
+};
+
+
+/*!
+    Sets up the validator. The \a parent parameter is
+    passed on to the QObject constructor.
+*/
+
+QValidator::QValidator(QObject * parent)
+    : QObject(*new QValidatorPrivate, parent)
+{
+}
+
+#ifdef QT3_SUPPORT
+/*!
+  \obsolete
+    Sets up the validator. The \a parent and \a name parameters are
+    passed on to the QObject constructor.
+*/
+
+QValidator::QValidator(QObject * parent, const char *name)
+    : QObject(*new QValidatorPrivate, parent)
+{
+    setObjectName(QString::fromAscii(name));
+}
+#endif
+
+/*!
+    Destroys the validator, freeing any storage and other resources
+    used.
+*/
+
+QValidator::~QValidator()
+{
+}
+
+/*!
+    Returns the locale for the validator. The locale is by default initialized to the same as QLocale().
+
+    \sa setLocale()
+    \sa QLocale::QLocale()
+*/
+QLocale QValidator::locale() const
+{
+    Q_D(const QValidator);
+    return d->locale;
+}
+
+/*!
+    Sets the \a locale that will be used for the validator. Unless
+    setLocale has been called, the validator will use the default
+    locale set with QLocale::setDefault(). If a default locale has not
+    been set, it is the operating system's locale.
+
+    \sa locale() QLocale::setDefault()
+*/
+void QValidator::setLocale(const QLocale &locale)
+{
+    Q_D(QValidator);
+    d->locale = locale;
+}
+
+/*!
+    \fn QValidator::State QValidator::validate(QString &input, int &pos) const
+
+    This virtual function returns \l Invalid if \a input is invalid
+    according to this validator's rules, \l Intermediate if it
+    is likely that a little more editing will make the input
+    acceptable (e.g. the user types "4" into a widget which accepts
+    integers between 10 and 99), and \l Acceptable if the input is
+    valid.
+
+    The function can change both \a input and \a pos (the cursor position)
+    if required.
+*/
+
+
+/*!
+    \fn void QValidator::fixup(QString & input) const
+
+    This function attempts to change \a input to be valid according to
+    this validator's rules. It need not result in a valid string:
+    callers of this function must re-test afterwards; the default does
+    nothing.
+
+    Reimplementations of this function can change \a input even if
+    they do not produce a valid string. For example, an ISBN validator
+    might want to delete every character except digits and "-", even
+    if the result is still not a valid ISBN; a surname validator might
+    want to remove whitespace from the start and end of the string,
+    even if the resulting string is not in the list of accepted
+    surnames.
+*/
+
+void QValidator::fixup(QString &) const
+{
+}
+
+
+/*!
+    \class QIntValidator
+    \brief The QIntValidator class provides a validator that ensures
+    a string contains a valid integer within a specified range.
+
+    \ingroup misc
+
+    Example of use:
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qvalidator.cpp 0
+
+    Below we present some examples of validators. In practice they would
+    normally be associated with a widget as in the example above.
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qvalidator.cpp 1
+
+    Notice that the value \c 999 returns Intermediate. Values
+    consisting of a number of digits equal to or less than the max
+    value are considered intermediate. This is intended because the
+    digit that prevents a number to be in range is not necessarily the
+    last digit typed. This also means that an intermediate number can
+    have leading zeros.
+
+    The minimum and maximum values are set in one call with setRange(),
+    or individually with setBottom() and setTop().
+
+    QIntValidator uses its locale() to interpret the number. For example,
+    in Arabic locales, QIntValidator will accept Arabic digits. In addition,
+    QIntValidator is always guaranteed to accept a number formatted according
+    to the "C" locale.
+
+    \sa QDoubleValidator, QRegExpValidator, {Line Edits Example}
+*/
+
+/*!
+    Constructs a validator with a \a parent object that
+    accepts all integers.
+*/
+
+QIntValidator::QIntValidator(QObject * parent)
+    : QValidator(parent)
+{
+    b = INT_MIN;
+    t = INT_MAX;
+}
+
+
+/*!
+    Constructs a validator with a \a parent, that accepts integers
+    from \a minimum to \a maximum inclusive.
+*/
+
+QIntValidator::QIntValidator(int minimum, int maximum,
+                              QObject * parent)
+    : QValidator(parent)
+{
+    b = minimum;
+    t = maximum;
+}
+
+
+#ifdef QT3_SUPPORT
+/*!
+  \obsolete
+
+    Constructs a validator with a \a parent object and a \a name that
+    accepts all integers.
+*/
+
+QIntValidator::QIntValidator(QObject * parent, const char *name)
+    : QValidator(parent)
+{
+    setObjectName(QString::fromAscii(name));
+    b = INT_MIN;
+    t = INT_MAX;
+}
+
+
+/*!
+  \obsolete
+
+    Constructs a validator called \a name with a \a parent, that
+    accepts integers from \a minimum to \a maximum inclusive.
+*/
+
+QIntValidator::QIntValidator(int minimum, int maximum,
+                              QObject * parent, const char* name)
+    : QValidator(parent)
+{
+    setObjectName(QString::fromAscii(name));
+    b = minimum;
+    t = maximum;
+}
+#endif
+
+/*!
+    Destroys the validator.
+*/
+
+QIntValidator::~QIntValidator()
+{
+    // nothing
+}
+
+
+/*!
+    \fn QValidator::State QIntValidator::validate(QString &input, int &pos) const
+
+    Returns \l Acceptable if the \a input is an integer within the
+    valid range, \l Intermediate if the \a input is a prefix of an integer in the
+    valid range, and \l Invalid otherwise.
+
+    If the valid range consists of just positive integers (e.g., 32 to 100)
+    and \a input is a negative integer, then Invalid is returned. (On the other
+    hand, if the range consists of negative integers (e.g., -100 to -32) and
+    \a input is a positive integer, then Intermediate is returned, because
+    the user might be just about to type the minus (especially for right-to-left
+    languages).
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qvalidator.cpp 2
+
+    By default, the \a pos parameter is not used by this validator.
+*/
+
+static int numDigits(qlonglong n)
+{
+    if (n == 0)
+        return 1;
+    return (int)log10(double(n)) + 1;
+};
+
+static qlonglong pow10(int exp)
+{
+    qlonglong result = 1;
+    for (int i = 0; i < exp; ++i)
+        result *= 10;
+    return result;
+}
+
+QValidator::State QIntValidator::validate(QString & input, int&) const
+{
+    QByteArray buff;
+    if (!locale().d()->validateChars(input, QLocalePrivate::IntegerMode, &buff)) {
+        QLocale cl(QLocale::C);
+        if (!cl.d()->validateChars(input, QLocalePrivate::IntegerMode, &buff))
+            return Invalid;
+    }
+
+    if (buff.isEmpty())
+        return Intermediate;
+
+    if (b >= 0 && buff.startsWith('-'))
+        return Invalid;
+
+    if (t < 0 && buff.startsWith('+'))
+        return Invalid;
+
+    if (buff.size() == 1 && (buff.at(0) == '+' || buff.at(0) == '-'))
+        return Intermediate;
+
+    bool ok, overflow;
+    qlonglong entered = QLocalePrivate::bytearrayToLongLong(buff.constData(), 10, &ok, &overflow);
+    if (overflow || !ok)
+        return Invalid;
+    if (entered >= b && entered <= t)
+        return Acceptable;
+
+    if (entered >= 0) {
+        // the -entered < b condition is necessary to allow people to type
+        // the minus last (e.g. for right-to-left languages)
+        return (entered > t && -entered < b) ? Invalid : Intermediate;
+    } else {
+        return (entered < b) ? Invalid : Intermediate;
+    }
+}
+
+
+/*!
+    Sets the range of the validator to only accept integers between \a
+    bottom and \a top inclusive.
+*/
+
+void QIntValidator::setRange(int bottom, int top)
+{
+    b = bottom;
+    t = top;
+}
+
+
+/*!
+    \property QIntValidator::bottom
+    \brief the validator's lowest acceptable value
+
+    By default, this property's value is derived from the lowest signed
+    integer available (typically -2147483647).
+
+    \sa setRange()
+*/
+void QIntValidator::setBottom(int bottom)
+{
+    setRange(bottom, top());
+}
+
+/*!
+    \property QIntValidator::top
+    \brief the validator's highest acceptable value
+
+    By default, this property's value is derived from the highest signed
+    integer available (typically 2147483647).
+
+    \sa setRange()
+*/
+void QIntValidator::setTop(int top)
+{
+    setRange(bottom(), top);
+}
+
+
+#ifndef QT_NO_REGEXP
+
+/*!
+    \internal
+*/
+QValidator::QValidator(QObjectPrivate &d, QObject *parent)
+        : QObject(d, parent)
+{
+}
+
+/*!
+    \internal
+*/
+QValidator::QValidator(QValidatorPrivate &d, QObject *parent)
+        : QObject(d, parent)
+{
+}
+
+class QDoubleValidatorPrivate : public QValidatorPrivate
+{
+    Q_DECLARE_PUBLIC(QDoubleValidator)
+public:
+    QDoubleValidatorPrivate()
+        : QValidatorPrivate()
+        , notation(QDoubleValidator::ScientificNotation)
+    {
+    }
+
+    QDoubleValidator::Notation notation;
+};
+
+
+/*!
+    \class QDoubleValidator
+
+    \brief The QDoubleValidator class provides range checking of
+    floating-point numbers.
+
+    \ingroup misc
+
+    QDoubleValidator provides an upper bound, a lower bound, and a
+    limit on the number of digits after the decimal point. It does not
+    provide a fixup() function.
+
+    You can set the acceptable range in one call with setRange(), or
+    with setBottom() and setTop(). Set the number of decimal places
+    with setDecimals(). The validate() function returns the validation
+    state.
+
+    QDoubleValidator uses its locale() to interpret the number. For example,
+    in the German locale, "1,234" will be accepted as the fractional number
+    1.234. In Arabic locales, QDoubleValidator will accept Arabic digits.
+
+    In addition, QDoubleValidator is always guaranteed to accept a number
+    formatted according to the "C" locale. QDoubleValidator will not accept
+    numbers with thousand-seperators.
+
+    \sa QIntValidator, QRegExpValidator, {Line Edits Example}
+*/
+
+ /*!
+    \enum QDoubleValidator::Notation
+    \since 4.3
+    This enum defines the allowed notations for entering a double.
+
+    \value StandardNotation      The string is written as a standard number
+                                 (i.e. 0.015).
+    \value ScientificNotation    The string is written in scientific
+                                 form. It may have an exponent part(i.e. 1.5E-2).
+*/
+
+/*!
+    Constructs a validator object with a \a parent object
+    that accepts any double.
+*/
+
+QDoubleValidator::QDoubleValidator(QObject * parent)
+    : QValidator(*new QDoubleValidatorPrivate , parent)
+{
+    b = -HUGE_VAL;
+    t = HUGE_VAL;
+    dec = 1000;
+}
+
+
+/*!
+    Constructs a validator object with a \a parent object. This
+    validator will accept doubles from \a bottom to \a top inclusive,
+    with up to \a decimals digits after the decimal point.
+*/
+
+QDoubleValidator::QDoubleValidator(double bottom, double top, int decimals,
+                                    QObject * parent)
+    : QValidator(*new QDoubleValidatorPrivate , parent)
+{
+    b = bottom;
+    t = top;
+    dec = decimals;
+}
+
+#ifdef QT3_SUPPORT
+/*!
+  \obsolete
+
+    Constructs a validator object with a \a parent object and a \a name
+    that accepts any double.
+*/
+
+QDoubleValidator::QDoubleValidator(QObject * parent, const char *name)
+    : QValidator(*new QDoubleValidatorPrivate , parent)
+{
+    setObjectName(QString::fromAscii(name));
+    b = -HUGE_VAL;
+    t = HUGE_VAL;
+    dec = 1000;
+}
+
+
+/*!
+  \obsolete
+
+    Constructs a validator object with a \a parent object, called \a
+    name. This validator will accept doubles from \a bottom to \a top
+    inclusive, with up to \a decimals digits after the decimal point.
+*/
+
+QDoubleValidator::QDoubleValidator(double bottom, double top, int decimals,
+                                    QObject * parent, const char* name)
+    : QValidator(*new QDoubleValidatorPrivate, parent)
+{
+    setObjectName(QString::fromAscii(name));
+    b = bottom;
+    t = top;
+    dec = decimals;
+}
+#endif
+
+/*!
+    Destroys the validator.
+*/
+
+QDoubleValidator::~QDoubleValidator()
+{
+}
+
+
+/*!
+    \fn QValidator::State QDoubleValidator::validate(QString &input, int &pos) const
+
+    Returns \l Acceptable if the string \a input contains a double
+    that is within the valid range and is in the correct format.
+
+    Returns \l Intermediate if \a input contains a double that is
+    outside the range or is in the wrong format; e.g. with too many
+    digits after the decimal point or is empty.
+
+    Returns \l Invalid if the \a input is not a double.
+
+    Note: If the valid range consists of just positive doubles (e.g. 0.0 to 100.0)
+    and \a input is a negative double then \l Invalid is returned. If notation()
+    is set to StandardNotation, and the input contains more digits before the
+    decimal point than a double in the valid range may have, \l Invalid is returned.
+    If notation() is ScientificNotation, and the input is not in the valid range,
+    \l Intermediate is returned. The value may yet become valid by changing the exponent.
+
+    By default, the \a pos parameter is not used by this validator.
+*/
+
+#ifndef LLONG_MAX
+#   define LLONG_MAX Q_INT64_C(0x7fffffffffffffff)
+#endif
+
+QValidator::State QDoubleValidator::validate(QString & input, int &) const
+{
+    Q_D(const QDoubleValidator);
+
+    QLocalePrivate::NumberMode numMode = QLocalePrivate::DoubleStandardMode;
+    switch (d->notation) {
+        case StandardNotation:
+            numMode = QLocalePrivate::DoubleStandardMode;
+            break;
+        case ScientificNotation:
+            numMode = QLocalePrivate::DoubleScientificMode;
+            break;
+    };
+
+    QByteArray buff;
+    if (!locale().d()->validateChars(input, numMode, &buff, dec)) {
+        QLocale cl(QLocale::C);
+        if (!cl.d()->validateChars(input, numMode, &buff, dec))
+            return Invalid;
+    }
+
+    if (buff.isEmpty())
+        return Intermediate;
+
+    if (b >= 0 && buff.startsWith('-'))
+        return Invalid;
+
+    if (t < 0 && buff.startsWith('+'))
+        return Invalid;
+
+    bool ok, overflow;
+    double i = QLocalePrivate::bytearrayToDouble(buff.constData(), &ok, &overflow);
+    if (overflow)
+        return Invalid;
+    if (!ok)
+        return Intermediate;
+
+    if (i >= b && i <= t)
+        return Acceptable;
+
+    if (d->notation == StandardNotation) {
+        double max = qMax(qAbs(b), qAbs(t));
+        if (max < LLONG_MAX) {
+            qlonglong n = pow10(numDigits(qlonglong(max))) - 1;
+            if (qAbs(i) > n)
+                return Invalid;
+        }
+    }
+
+    return Intermediate;
+}
+
+
+/*!
+    Sets the validator to accept doubles from \a minimum to \a maximum
+    inclusive, with at most \a decimals digits after the decimal
+    point.
+*/
+
+void QDoubleValidator::setRange(double minimum, double maximum, int decimals)
+{
+    b = minimum;
+    t = maximum;
+    dec = decimals;
+}
+
+/*!
+    \property QDoubleValidator::bottom
+    \brief the validator's minimum acceptable value
+
+    By default, this property contains a value of -infinity.
+
+    \sa setRange()
+*/
+
+void QDoubleValidator::setBottom(double bottom)
+{
+    setRange(bottom, top(), decimals());
+}
+
+
+/*!
+    \property QDoubleValidator::top
+    \brief the validator's maximum acceptable value
+
+    By default, this property contains a value of infinity.
+
+    \sa setRange()
+*/
+
+void QDoubleValidator::setTop(double top)
+{
+    setRange(bottom(), top, decimals());
+}
+
+/*!
+    \property QDoubleValidator::decimals
+    \brief the validator's maximum number of digits after the decimal point
+
+    By default, this property contains a value of 1000.
+
+    \sa setRange()
+*/
+
+void QDoubleValidator::setDecimals(int decimals)
+{
+    setRange(bottom(), top(), decimals);
+}
+
+/*!
+    \property QDoubleValidator::notation
+    \since 4.3
+    \brief the notation of how a string can describe a number
+
+    By default, this property is set to ScientificNotation.
+
+    \sa Notation
+*/
+
+void QDoubleValidator::setNotation(Notation newNotation)
+{
+    Q_D(QDoubleValidator);
+    d->notation = newNotation;
+}
+
+QDoubleValidator::Notation QDoubleValidator::notation() const
+{
+    Q_D(const QDoubleValidator);
+    return d->notation;
+}
+
+/*!
+    \class QRegExpValidator
+    \brief The QRegExpValidator class is used to check a string
+    against a regular expression.
+
+    \ingroup misc
+
+    QRegExpValidator 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 QRegExpValidator is constructed, or at a later time.
+
+    When QRegExpValidator determines whether a string is \l Acceptable
+    or not, the regexp is treated as if it begins with the start of string
+    assertion (\bold{^}) and ends with the end of string assertion
+    (\bold{$}); the match is against the entire input string, or from
+    the given position if a start position greater than zero is given.
+
+    If a string is a prefix of an \l Acceptable string, it is considered
+    \l Intermediate. For example, "" and "A" are \l Intermediate for the
+    regexp \bold{[A-Z][0-9]} (whereas "_" would be \l Invalid).
+
+    For a brief introduction to Qt's regexp engine, see \l QRegExp.
+
+    Example of use:
+    \snippet doc/src/snippets/code/src_gui_widgets_qvalidator.cpp 3
+
+    Below we present some examples of validators. In practice they would
+    normally be associated with a widget as in the example above.
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qvalidator.cpp 4
+
+    \sa QRegExp, QIntValidator, QDoubleValidator, {Settings Editor Example}
+*/
+
+/*!
+    Constructs a validator with a \a parent object that accepts
+    any string (including an empty one) as valid.
+*/
+
+QRegExpValidator::QRegExpValidator(QObject *parent)
+    : QValidator(parent), r(QString::fromLatin1(".*"))
+{
+}
+
+/*!
+    Constructs a validator with a \a parent object that
+    accepts all strings that match the regular expression \a rx.
+
+    The match is made against the entire string; e.g. if the regexp is
+    \bold{[A-Fa-f0-9]+} it will be treated as \bold{^[A-Fa-f0-9]+$}.
+*/
+
+QRegExpValidator::QRegExpValidator(const QRegExp& rx, QObject *parent)
+    : QValidator(parent), r(rx)
+{
+}
+
+#ifdef QT3_SUPPORT
+/*!
+  \obsolete
+
+    Constructs a validator with a \a parent object and \a name that accepts
+    any string (including an empty one) as valid.
+*/
+
+QRegExpValidator::QRegExpValidator(QObject *parent, const char *name)
+    : QValidator(parent), r(QString::fromLatin1(".*"))
+{
+        setObjectName(QString::fromAscii(name));
+}
+
+/*!
+  \obsolete
+
+    Constructs a validator with a \a parent object and a \a name that
+    accepts all strings that match the regular expression \a rx.
+
+    The match is made against the entire string; e.g. if the regexp is
+    \bold{[A-Fa-f0-9]+} it will be treated as \bold{^[A-Fa-f0-9]+$}.
+*/
+
+QRegExpValidator::QRegExpValidator(const QRegExp& rx, QObject *parent,
+                                    const char *name)
+    : QValidator(parent), r(rx)
+{
+        setObjectName(QString::fromAscii(name));
+}
+#endif
+
+/*!
+    Destroys the validator.
+*/
+
+QRegExpValidator::~QRegExpValidator()
+{
+}
+
+/*!
+    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.
+
+    The \a pos parameter is set to the length of the \a input parameter.
+
+    For example, if the regular expression is \bold{\\w\\d\\d}
+    (word-character, digit, digit) then "A57" is \l Acceptable,
+    "E5" is \l Intermediate, and "+9" is \l Invalid.
+
+    \sa QRegExp::exactMatch()
+*/
+
+QValidator::State QRegExpValidator::validate(QString &input, int& pos) const
+{
+    if (r.exactMatch(input)) {
+        return Acceptable;
+    } else {
+        if (const_cast<QRegExp &>(r).matchedLength() == input.size()) {
+            return Intermediate;
+        } else {
+            pos = input.size();
+            return Invalid;
+        }
+    }
+}
+
+/*!
+    \property QRegExpValidator::regExp
+    \brief the regular expression used for validation
+
+    By default, this property contains a regular expression with the pattern \c{.*}
+    that matches any string.
+*/
+
+void QRegExpValidator::setRegExp(const QRegExp& rx)
+{
+    r = rx;
+}
+
+#endif
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_VALIDATOR