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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 <private/qabstractspinbox_p.h>
+#include <qspinbox.h>
+
+#ifndef QT_NO_SPINBOX
+
+#include <qlineedit.h>
+#include <qlocale.h>
+#include <qvalidator.h>
+#include <qdebug.h>
+
+#include <math.h>
+
+QT_BEGIN_NAMESPACE
+
+//#define QSPINBOX_QSBDEBUG
+#ifdef QSPINBOX_QSBDEBUG
+#  define QSBDEBUG qDebug
+#else
+#  define QSBDEBUG if (false) qDebug
+#endif
+
+static bool isIntermediateValueHelper(qint64 num, qint64 minimum, qint64 maximum, qint64 *match = 0);
+
+class QSpinBoxPrivate : public QAbstractSpinBoxPrivate
+{
+    Q_DECLARE_PUBLIC(QSpinBox)
+public:
+    QSpinBoxPrivate(QWidget *parent = 0);
+    void emitSignals(EmitPolicy ep, const QVariant &);
+
+    virtual QVariant valueFromText(const QString &n) const;
+    virtual QString textFromValue(const QVariant &n) const;
+    QVariant validateAndInterpret(QString &input, int &pos,
+                                  QValidator::State &state) const;
+    bool isIntermediateValue(const QString &str) const;
+    QChar thousand;
+
+    inline void init() {
+        setLayoutItemMargins(QStyle::SE_SpinBoxLayoutItem);
+    }
+};
+
+class QDoubleSpinBoxPrivate : public QAbstractSpinBoxPrivate
+{
+    Q_DECLARE_PUBLIC(QDoubleSpinBox)
+public:
+    QDoubleSpinBoxPrivate(QWidget *parent = 0);
+    void emitSignals(EmitPolicy ep, const QVariant &);
+    bool isIntermediateValue(const QString &str) const;
+
+    virtual QVariant valueFromText(const QString &n) const;
+    virtual QString textFromValue(const QVariant &n) const;
+    QVariant validateAndInterpret(QString &input, int &pos,
+                                  QValidator::State &state) const;
+    double round(double input) const;
+    // variables
+    int decimals;
+    QChar delimiter, thousand;
+};
+
+
+/*!
+    \class QSpinBox
+    \brief The QSpinBox class provides a spin box widget.
+
+    \ingroup basicwidgets
+    \mainclass
+
+    QSpinBox is designed to handle integers and discrete sets of
+    values (e.g., month names); use QDoubleSpinBox for floating point
+    values.
+
+    QSpinBox allows the user to choose a value by clicking the up/down
+    buttons or pressing up/down on the keyboard to increase/decrease
+    the value currently displayed. The user can also type the value in
+    manually. The spin box supports integer values but can be extended to
+    use different strings with validate(), textFromValue() and valueFromText().
+
+    Every time the value changes QSpinBox emits the valueChanged()
+    signals. The current value can be fetched with value() and set
+    with setValue().
+
+    Clicking the up/down buttons or using the keyboard accelerator's
+    up and down arrows will increase or decrease the current value in
+    steps of size singleStep(). If you want to change this behaviour you
+    can reimplement the virtual function stepBy(). The minimum and
+    maximum value and the step size can be set using one of the
+    constructors, and can be changed later with setMinimum(),
+    setMaximum() and setSingleStep().
+
+    Most spin boxes are directional, but QSpinBox can also operate as
+    a circular spin box, i.e. if the range is 0-99 and the current
+    value is 99, clicking "up" will give 0 if wrapping() is set to
+    true. Use setWrapping() if you want circular behavior.
+
+    The displayed value can be prepended and appended with arbitrary
+    strings indicating, for example, currency or the unit of
+    measurement. See setPrefix() and setSuffix(). The text in the spin
+    box is retrieved with text() (which includes any prefix() and
+    suffix()), or with cleanText() (which has no prefix(), no suffix()
+    and no leading or trailing whitespace).
+
+    It is often desirable to give the user a special (often default)
+    choice in addition to the range of numeric values. See
+    setSpecialValueText() for how to do this with QSpinBox.
+
+    \table 100%
+    \row \o \inlineimage windowsxp-spinbox.png Screenshot of a Windows XP spin box
+         \o A spin box shown in the \l{Windows XP Style Widget Gallery}{Windows XP widget style}.
+    \row \o \inlineimage plastique-spinbox.png Screenshot of a Plastique spin box
+         \o A spin box shown in the \l{Plastique Style Widget Gallery}{Plastique widget style}.
+    \row \o \inlineimage macintosh-spinbox.png Screenshot of a Macintosh spin box
+         \o A spin box shown in the \l{Macintosh Style Widget Gallery}{Macintosh widget style}.
+    \endtable
+
+    \section1 Subclassing QSpinBox
+
+    If using prefix(), suffix(), and specialValueText() don't provide
+    enough control, you subclass QSpinBox and reimplement
+    valueFromText() and textFromValue(). For example, here's the code
+    for a custom spin box that allows the user to enter icon sizes
+    (e.g., "32 x 32"):
+
+    \snippet examples/widgets/icons/iconsizespinbox.cpp 1
+    \codeline
+    \snippet examples/widgets/icons/iconsizespinbox.cpp 2
+
+    See the \l{widgets/icons}{Icons} example for the full source
+    code.
+
+    \sa QDoubleSpinBox, QDateTimeEdit, QSlider, {Spin Boxes Example}
+*/
+
+/*!
+    \fn void QSpinBox::valueChanged(int i)
+
+    This signal is emitted whenever the spin box's value is changed.
+    The new value's integer value is passed in \a i.
+*/
+
+/*!
+    \fn void QSpinBox::valueChanged(const QString &text)
+
+    \overload
+
+    The new value is passed literally in \a text with no prefix() or
+    suffix().
+*/
+
+/*!
+    Constructs a spin box with 0 as minimum value and 99 as maximum value, a
+    step value of 1. The value is initially set to 0. It is parented to \a
+    parent.
+
+    \sa setMinimum(), setMaximum(), setSingleStep()
+*/
+
+QSpinBox::QSpinBox(QWidget *parent)
+    : QAbstractSpinBox(*new QSpinBoxPrivate(parent), parent)
+{
+    Q_D(QSpinBox);
+    d->init();
+}
+
+#ifdef QT3_SUPPORT
+/*!
+    Use one of the constructors that doesn't take the \a name
+    argument and then use setObjectName() instead.
+*/
+QSpinBox::QSpinBox(QWidget *parent, const char *name)
+    : QAbstractSpinBox(*new QSpinBoxPrivate(parent), parent)
+{
+    Q_D(QSpinBox);
+    setObjectName(QString::fromAscii(name));
+    d->init();
+}
+
+/*!
+    Use one of the constructors that doesn't take the \a name
+    argument and then use setObjectName() instead.
+*/
+QSpinBox::QSpinBox(int minimum, int maximum, int step, QWidget *parent, const char *name)
+    : QAbstractSpinBox(*new QSpinBoxPrivate(parent), parent)
+{
+    Q_D(QSpinBox);
+    d->minimum = QVariant(qMin<int>(minimum, maximum));
+    d->maximum = QVariant(qMax<int>(minimum, maximum));
+    d->singleStep = QVariant(step);
+    setObjectName(QString::fromAscii(name));
+    d->init();
+}
+
+#endif
+
+/*!
+    \property QSpinBox::value
+    \brief the value of the spin box
+
+    setValue() will emit valueChanged() if the new value is different
+    from the old one.
+*/
+
+int QSpinBox::value() const
+{
+    Q_D(const QSpinBox);
+    return d->value.toInt();
+}
+
+void QSpinBox::setValue(int value)
+{
+    Q_D(QSpinBox);
+    d->setValue(QVariant(value), EmitIfChanged);
+}
+
+/*!
+    \property QSpinBox::prefix
+    \brief the spin box's prefix
+
+    The prefix is prepended to the start of the displayed value.
+    Typical use is to display a unit of measurement or a currency
+    symbol. For example:
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 0
+
+    To turn off the prefix display, set this property to an empty
+    string. The default is no prefix. The prefix is not displayed when
+    value() == minimum() and specialValueText() is set.
+
+    If no prefix is set, prefix() returns an empty string.
+
+    \sa suffix(), setSuffix(), specialValueText(), setSpecialValueText()
+*/
+
+QString QSpinBox::prefix() const
+{
+    Q_D(const QSpinBox);
+    return d->prefix;
+}
+
+void QSpinBox::setPrefix(const QString &prefix)
+{
+    Q_D(QSpinBox);
+
+    d->prefix = prefix;
+    d->updateEdit();
+}
+
+/*!
+    \property QSpinBox::suffix
+    \brief the suffix of the spin box
+
+    The suffix is appended to the end of the displayed value. Typical
+    use is to display a unit of measurement or a currency symbol. For
+    example:
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 1
+
+    To turn off the suffix display, set this property to an empty
+    string. The default is no suffix. The suffix is not displayed for
+    the minimum() if specialValueText() is set.
+
+    If no suffix is set, suffix() returns an empty string.
+
+    \sa prefix(), setPrefix(), specialValueText(), setSpecialValueText()
+*/
+
+QString QSpinBox::suffix() const
+{
+    Q_D(const QSpinBox);
+
+    return d->suffix;
+}
+
+void QSpinBox::setSuffix(const QString &suffix)
+{
+    Q_D(QSpinBox);
+
+    d->suffix = suffix;
+    d->updateEdit();
+}
+
+/*!
+    \property QSpinBox::cleanText
+
+    \brief the text of the spin box excluding any prefix, suffix,
+    or leading or trailing whitespace.
+
+    \sa text, QSpinBox::prefix, QSpinBox::suffix
+*/
+
+QString QSpinBox::cleanText() const
+{
+    Q_D(const QSpinBox);
+
+    return d->stripped(d->edit->displayText());
+}
+
+
+/*!
+    \property QSpinBox::singleStep
+    \brief the step value
+
+    When the user uses the arrows to change the spin box's value the
+    value will be incremented/decremented by the amount of the
+    singleStep. The default value is 1. Setting a singleStep value of
+    less than 0 does nothing.
+*/
+
+int QSpinBox::singleStep() const
+{
+    Q_D(const QSpinBox);
+
+    return d->singleStep.toInt();
+}
+
+void QSpinBox::setSingleStep(int value)
+{
+    Q_D(QSpinBox);
+    if (value >= 0) {
+        d->singleStep = QVariant(value);
+        d->updateEdit();
+    }
+}
+
+/*!
+    \property QSpinBox::minimum
+
+    \brief the minimum value of the spin box
+
+    When setting this property the \l maximum is adjusted
+    if necessary to ensure that the range remains valid.
+
+    The default minimum value is 0.
+
+    \sa setRange()  specialValueText
+*/
+
+int QSpinBox::minimum() const
+{
+    Q_D(const QSpinBox);
+
+    return d->minimum.toInt();
+}
+
+void QSpinBox::setMinimum(int minimum)
+{
+    Q_D(QSpinBox);
+    const QVariant m(minimum);
+    d->setRange(m, (d->variantCompare(d->maximum, m) > 0 ? d->maximum : m));
+}
+
+/*!
+    \property QSpinBox::maximum
+
+    \brief the maximum value of the spin box
+
+    When setting this property the \l minimum is adjusted
+    if necessary, to ensure that the range remains valid.
+
+    The default maximum value is 99.
+
+    \sa setRange() specialValueText
+
+*/
+
+int QSpinBox::maximum() const
+{
+    Q_D(const QSpinBox);
+
+    return d->maximum.toInt();
+}
+
+void QSpinBox::setMaximum(int maximum)
+{
+    Q_D(QSpinBox);
+    const QVariant m(maximum);
+    d->setRange((d->variantCompare(d->minimum, m) < 0 ? d->minimum : m), m);
+}
+
+/*!
+    Convenience function to set the \a minimum, and \a maximum values
+    with a single function call.
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 2
+    is equivalent to:
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 3
+
+    \sa minimum maximum
+*/
+
+void QSpinBox::setRange(int minimum, int maximum)
+{
+    Q_D(QSpinBox);
+    d->setRange(QVariant(minimum), QVariant(maximum));
+}
+
+/*!
+    This virtual function is used by the spin box whenever it needs
+    to display the given \a value. The default implementation returns
+    a string containing \a value printed in the standard way using
+    QWidget::locale().toString(). Reimplementations may return anything. (See
+    the example in the detailed description.)
+
+    Note: QSpinBox does not call this function for specialValueText()
+    and that neither prefix() nor suffix() should be included in the
+    return value.
+
+    If you reimplement this, you may also need to reimplement
+    valueFromText() and validate()
+
+    \sa valueFromText(), validate()
+*/
+
+QString QSpinBox::textFromValue(int value) const
+{
+    Q_D(const QSpinBox);
+    QString str = locale().toString(value);
+    if (qAbs(value) >= 1000 || value == INT_MIN) {
+        str.remove(d->thousand);
+    }
+
+    return str;
+}
+
+/*!
+    \fn int QSpinBox::valueFromText(const QString &text) const
+
+    This virtual function is used by the spin box whenever it needs to
+    interpret \a text entered by the user as a value.
+
+    Subclasses that need to display spin box values in a non-numeric
+    way need to reimplement this function.
+
+    Note: QSpinBox handles specialValueText() separately; this
+    function is only concerned with the other values.
+
+    \sa textFromValue(), validate()
+*/
+
+int QSpinBox::valueFromText(const QString &text) const
+{
+    Q_D(const QSpinBox);
+
+    QString copy = text;
+    int pos = d->edit->cursorPosition();
+    QValidator::State state = QValidator::Acceptable;
+    return d->validateAndInterpret(copy, pos, state).toInt();
+}
+
+/*!
+  \reimp
+*/
+QValidator::State QSpinBox::validate(QString &text, int &pos) const
+{
+    Q_D(const QSpinBox);
+
+    QValidator::State state;
+    d->validateAndInterpret(text, pos, state);
+    return state;
+}
+
+
+/*!
+  \reimp
+*/
+void QSpinBox::fixup(QString &input) const
+{
+    Q_D(const QSpinBox);
+
+    input.remove(d->thousand);
+}
+
+
+// --- QDoubleSpinBox ---
+
+/*!
+    \class QDoubleSpinBox
+    \brief The QDoubleSpinBox class provides a spin box widget that
+    takes doubles.
+
+    \ingroup basicwidgets
+    \mainclass
+
+    QDoubleSpinBox allows the user to choose a value by clicking the
+    up and down buttons or by pressing Up or Down on the keyboard to
+    increase or decrease the value currently displayed. The user can
+    also type the value in manually. The spin box supports double
+    values but can be extended to use different strings with
+    validate(), textFromValue() and valueFromText().
+
+    Every time the value changes QDoubleSpinBox emits the
+    valueChanged() signal. The current value can be fetched with
+    value() and set with setValue().
+
+    Note: QDoubleSpinBox will round numbers so they can be displayed
+    with the current precision. In a QDoubleSpinBox with decimals set
+    to 2, calling setValue(2.555) will cause value() to return 2.56.
+
+    Clicking the up and down buttons or using the keyboard accelerator's
+    Up and Down arrows will increase or decrease the current value in
+    steps of size singleStep(). If you want to change this behavior you
+    can reimplement the virtual function stepBy(). The minimum and
+    maximum value and the step size can be set using one of the
+    constructors, and can be changed later with setMinimum(),
+    setMaximum() and setSingleStep(). The spinbox has a default
+    precision of 2 decimal places but this can be changed using
+    setDecimals().
+
+    Most spin boxes are directional, but QDoubleSpinBox can also
+    operate as a circular spin box, i.e. if the range is 0.0-99.9 and
+    the current value is 99.9, clicking "up" will give 0 if wrapping()
+    is set to true. Use setWrapping() if you want circular behavior.
+
+    The displayed value can be prepended and appended with arbitrary
+    strings indicating, for example, currency or the unit of
+    measurement. See setPrefix() and setSuffix(). The text in the spin
+    box is retrieved with text() (which includes any prefix() and
+    suffix()), or with cleanText() (which has no prefix(), no suffix()
+    and no leading or trailing whitespace).
+
+    It is often desirable to give the user a special (often default)
+    choice in addition to the range of numeric values. See
+    setSpecialValueText() for how to do this with QDoubleSpinBox.
+
+    \sa QSpinBox, QDateTimeEdit, QSlider, {Spin Boxes Example}
+*/
+
+/*!
+    \fn void QDoubleSpinBox::valueChanged(double d);
+
+    This signal is emitted whenever the spin box's value is changed.
+    The new value is passed in \a d.
+*/
+
+/*!
+    \fn void QDoubleSpinBox::valueChanged(const QString &text);
+
+    \overload
+
+    The new value is passed literally in \a text with no prefix() or
+    suffix().
+*/
+
+/*!
+    Constructs a spin box with 0.0 as minimum value and 99.99 as maximum value,
+    a step value of 1.0 and a precision of 2 decimal places. The value is
+    initially set to 0.00. The spin box has the given \a parent.
+
+    \sa setMinimum(), setMaximum(), setSingleStep()
+*/
+QDoubleSpinBox::QDoubleSpinBox(QWidget *parent)
+    : QAbstractSpinBox(*new QDoubleSpinBoxPrivate(parent), parent)
+{
+}
+
+/*!
+    \property QDoubleSpinBox::value
+    \brief the value of the spin box
+
+    setValue() will emit valueChanged() if the new value is different
+    from the old one.
+
+    Note: The value will be rounded so it can be displayed with the
+    current setting of decimals.
+
+    \sa decimals
+*/
+double QDoubleSpinBox::value() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->value.toDouble();
+}
+
+void QDoubleSpinBox::setValue(double value)
+{
+    Q_D(QDoubleSpinBox);
+    QVariant v(d->round(value));
+    d->setValue(v, EmitIfChanged);
+}
+/*!
+    \property QDoubleSpinBox::prefix
+    \brief the spin box's prefix
+
+    The prefix is prepended to the start of the displayed value.
+    Typical use is to display a unit of measurement or a currency
+    symbol. For example:
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 4
+
+    To turn off the prefix display, set this property to an empty
+    string. The default is no prefix. The prefix is not displayed when
+    value() == minimum() and specialValueText() is set.
+
+    If no prefix is set, prefix() returns an empty string.
+
+    \sa suffix(), setSuffix(), specialValueText(), setSpecialValueText()
+*/
+
+QString QDoubleSpinBox::prefix() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->prefix;
+}
+
+void QDoubleSpinBox::setPrefix(const QString &prefix)
+{
+    Q_D(QDoubleSpinBox);
+
+    d->prefix = prefix;
+    d->updateEdit();
+}
+
+/*!
+    \property QDoubleSpinBox::suffix
+    \brief the suffix of the spin box
+
+    The suffix is appended to the end of the displayed value. Typical
+    use is to display a unit of measurement or a currency symbol. For
+    example:
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 5
+
+    To turn off the suffix display, set this property to an empty
+    string. The default is no suffix. The suffix is not displayed for
+    the minimum() if specialValueText() is set.
+
+    If no suffix is set, suffix() returns an empty string.
+
+    \sa prefix(), setPrefix(), specialValueText(), setSpecialValueText()
+*/
+
+QString QDoubleSpinBox::suffix() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->suffix;
+}
+
+void QDoubleSpinBox::setSuffix(const QString &suffix)
+{
+    Q_D(QDoubleSpinBox);
+
+    d->suffix = suffix;
+    d->updateEdit();
+}
+
+/*!
+    \property QDoubleSpinBox::cleanText
+
+    \brief the text of the spin box excluding any prefix, suffix,
+    or leading or trailing whitespace.
+
+    \sa text, QDoubleSpinBox::prefix, QDoubleSpinBox::suffix
+*/
+
+QString QDoubleSpinBox::cleanText() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->stripped(d->edit->displayText());
+}
+
+/*!
+    \property QDoubleSpinBox::singleStep
+    \brief the step value
+
+    When the user uses the arrows to change the spin box's value the
+    value will be incremented/decremented by the amount of the
+    singleStep. The default value is 1.0. Setting a singleStep value
+    of less than 0 does nothing.
+*/
+double QDoubleSpinBox::singleStep() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->singleStep.toDouble();
+}
+
+void QDoubleSpinBox::setSingleStep(double value)
+{
+    Q_D(QDoubleSpinBox);
+
+    if (value >= 0) {
+        d->singleStep = value;
+        d->updateEdit();
+    }
+}
+
+/*!
+    \property QDoubleSpinBox::minimum
+
+    \brief the minimum value of the spin box
+
+    When setting this property the \l maximum is adjusted
+    if necessary to ensure that the range remains valid.
+
+    The default minimum value is 0.0.
+
+    Note: The minimum value will be rounded to match the decimals
+    property.
+
+    \sa decimals, setRange() specialValueText
+*/
+
+double QDoubleSpinBox::minimum() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->minimum.toDouble();
+}
+
+void QDoubleSpinBox::setMinimum(double minimum)
+{
+    Q_D(QDoubleSpinBox);
+    const QVariant m(d->round(minimum));
+    d->setRange(m, (d->variantCompare(d->maximum, m) > 0 ? d->maximum : m));
+}
+
+/*!
+    \property QDoubleSpinBox::maximum
+
+    \brief the maximum value of the spin box
+
+    When setting this property the \l minimum is adjusted
+    if necessary, to ensure that the range remains valid.
+
+    The default maximum value is 99.99.
+
+    Note: The maximum value will be rounded to match the decimals
+    property.
+
+    \sa decimals, setRange()
+*/
+
+double QDoubleSpinBox::maximum() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->maximum.toDouble();
+}
+
+void QDoubleSpinBox::setMaximum(double maximum)
+{
+    Q_D(QDoubleSpinBox);
+    const QVariant m(d->round(maximum));
+    d->setRange((d->variantCompare(d->minimum, m) < 0 ? d->minimum : m), m);
+}
+
+/*!
+    Convenience function to set the \a minimum and \a maximum values
+    with a single function call.
+
+    Note: The maximum and minimum values will be rounded to match the
+    decimals property.
+
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 6
+    is equivalent to:
+    \snippet doc/src/snippets/code/src_gui_widgets_qspinbox.cpp 7
+
+    \sa minimum maximum
+*/
+
+void QDoubleSpinBox::setRange(double minimum, double maximum)
+{
+    Q_D(QDoubleSpinBox);
+    d->setRange(QVariant(d->round(minimum)), QVariant(d->round(maximum)));
+}
+
+/*!
+     \property QDoubleSpinBox::decimals
+
+     \brief the precision of the spin box, in decimals
+
+     Sets how many decimals the spinbox will use for displaying and
+     interpreting doubles.
+
+     \warning The results might not be reliable with very high values
+     for \a decimals.
+
+     Note: The maximum, minimum and value might change as a result of
+     changing this property.
+*/
+
+int QDoubleSpinBox::decimals() const
+{
+    Q_D(const QDoubleSpinBox);
+
+    return d->decimals;
+}
+
+void QDoubleSpinBox::setDecimals(int decimals)
+{
+    Q_D(QDoubleSpinBox);
+    d->decimals = qMax(0, decimals);
+
+    setRange(minimum(), maximum()); // make sure values are rounded
+    setValue(value());
+}
+
+/*!
+    This virtual function is used by the spin box whenever it needs to
+    display the given \a value. The default implementation returns a string
+    containing \a value printed using QWidget::locale().toString(\a value,
+    QLatin1Char('f'), decimals()) and will remove the thousand
+    separator. Reimplementations may return anything.
+
+    Note: QDoubleSpinBox does not call this function for
+    specialValueText() and that neither prefix() nor suffix() should
+    be included in the return value.
+
+    If you reimplement this, you may also need to reimplement
+    valueFromText().
+
+    \sa valueFromText()
+*/
+
+
+QString QDoubleSpinBox::textFromValue(double value) const
+{
+    Q_D(const QDoubleSpinBox);
+    QString str = locale().toString(value, 'f', d->decimals);
+    if (qAbs(value) >= 1000.0) {
+        str.remove(d->thousand);
+    }
+    return str;
+}
+
+/*!
+    This virtual function is used by the spin box whenever it needs to
+    interpret \a text entered by the user as a value.
+
+    Subclasses that need to display spin box values in a non-numeric
+    way need to reimplement this function.
+
+    Note: QDoubleSpinBox handles specialValueText() separately; this
+    function is only concerned with the other values.
+
+    \sa textFromValue(), validate()
+*/
+double QDoubleSpinBox::valueFromText(const QString &text) const
+{
+    Q_D(const QDoubleSpinBox);
+
+    QString copy = text;
+    int pos = d->edit->cursorPosition();
+    QValidator::State state = QValidator::Acceptable;
+    return d->validateAndInterpret(copy, pos, state).toDouble();
+}
+
+/*!
+  \reimp
+*/
+QValidator::State QDoubleSpinBox::validate(QString &text, int &pos) const
+{
+    Q_D(const QDoubleSpinBox);
+
+    QValidator::State state;
+    d->validateAndInterpret(text, pos, state);
+    return state;
+}
+
+
+/*!
+  \reimp
+*/
+void QDoubleSpinBox::fixup(QString &input) const
+{
+    Q_D(const QDoubleSpinBox);
+
+    input.remove(d->thousand);
+}
+
+// --- QSpinBoxPrivate ---
+
+/*!
+    \internal
+    Constructs a QSpinBoxPrivate object
+*/
+
+QSpinBoxPrivate::QSpinBoxPrivate(QWidget *parent)
+{
+    minimum = QVariant((int)0);
+    maximum = QVariant((int)99);
+    value = minimum;
+    singleStep = QVariant((int)1);
+    type = QVariant::Int;
+    const QString str = (parent ? parent->locale() : QLocale()).toString(4567);
+    if (str.size() == 5) {
+        thousand = QChar(str.at(1));
+    }
+
+}
+
+/*!
+    \internal
+    \reimp
+*/
+
+void QSpinBoxPrivate::emitSignals(EmitPolicy ep, const QVariant &old)
+{
+    Q_Q(QSpinBox);
+    if (ep != NeverEmit) {
+        pendingEmit = false;
+        if (ep == AlwaysEmit || value != old) {
+            emit q->valueChanged(edit->displayText());
+            emit q->valueChanged(value.toInt());
+        }
+    }
+}
+
+/*!
+    \internal
+    \reimp
+*/
+
+QString QSpinBoxPrivate::textFromValue(const QVariant &value) const
+{
+    Q_Q(const QSpinBox);
+    return q->textFromValue(value.toInt());
+}
+/*!
+    \internal
+    \reimp
+*/
+
+QVariant QSpinBoxPrivate::valueFromText(const QString &text) const
+{
+    Q_Q(const QSpinBox);
+
+    return QVariant(q->valueFromText(text));
+}
+
+
+/*!
+  \internal
+
+  Return true if str can become a number which is between minimum and
+  maximum or false if this is not possible.
+*/
+
+bool QSpinBoxPrivate::isIntermediateValue(const QString &str) const
+{
+    const int num = q_func()->locale().toInt(str, 0, 10);
+    const int min = minimum.toInt();
+    const int max = maximum.toInt();
+
+    int numDigits = 0;
+    int digits[10];
+    int tmp = num;
+    if (tmp == 0) {
+        numDigits = 1;
+        digits[0] = 0;
+    } else {
+        tmp = num;
+        for (int i=0; tmp != 0; ++i) {
+            digits[numDigits++] = qAbs(tmp % 10);
+            tmp /= 10;
+        }
+    }
+
+    int failures = 0;
+    for (int number=min; /*number<=max*/; ++number) {
+        tmp = number;
+        for (int i=0; tmp != 0;) {
+            if (digits[i] == qAbs(tmp % 10)) {
+                if (++i == numDigits)
+                    return true;
+            }
+            tmp /= 10;
+        }
+        if (failures++ == 500000) //upper bound
+            return true;
+        if (number == max) // needed for INT_MAX
+            break;
+    }
+    return false;
+}
+
+/*!
+    \internal Multi purpose function that parses input, sets state to
+    the appropriate state and returns the value it will be interpreted
+    as.
+*/
+
+QVariant QSpinBoxPrivate::validateAndInterpret(QString &input, int &pos,
+                                               QValidator::State &state) const
+{
+    if (cachedText == input && !input.isEmpty()) {
+        state = cachedState;
+        QSBDEBUG() << "cachedText was" << "'" << cachedText << "'" << "state was "
+                   << state << " and value was " << cachedValue;
+
+        return cachedValue;
+    }
+    const int max = maximum.toInt();
+    const int min = minimum.toInt();
+
+    QString copy = stripped(input, &pos);
+    QSBDEBUG() << "input" << input << "copy" << copy;
+    state = QValidator::Acceptable;
+    int num = min;
+
+    if (max != min && (copy.isEmpty()
+                       || (min < 0 && copy == QLatin1String("-"))
+                       || (min >= 0 && copy == QLatin1String("+")))) {
+        state = QValidator::Intermediate;
+        QSBDEBUG() << __FILE__ << __LINE__<< "num is set to" << num;
+    } else if (copy.startsWith(QLatin1String("-")) && min >= 0) {
+        state = QValidator::Invalid; // special-case -0 will be interpreted as 0 and thus not be invalid with a range from 0-100
+    } else {
+        bool ok = false;
+        bool removedThousand = false;
+        num = q_func()->locale().toInt(copy, &ok, 10);
+        if (!ok && copy.contains(thousand) && (max >= 1000 || min <= -1000)) {
+            const int s = copy.size();
+            copy.remove(thousand);
+            pos = qMax(0, pos - (s - copy.size()));
+            removedThousand = true;
+            num = q_func()->locale().toInt(copy, &ok, 10);
+        }
+        QSBDEBUG() << __FILE__ << __LINE__<< "num is set to" << num;
+        if (!ok) {
+            state = QValidator::Invalid;
+        } else if (num >= min && num <= max) {
+            state = removedThousand ? QValidator::Intermediate : QValidator::Acceptable;
+        } else if (max == min) {
+            state = QValidator::Invalid;
+        } else {
+            if ((num >= 0 && num > max) || (num < 0 && num < min)) {
+                state = QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+            } else {
+                state = isIntermediateValue(copy) ? QValidator::Intermediate : QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to "
+                           << (state == QValidator::Intermediate ? "Intermediate" : "Acceptable");
+            }
+        }
+    }
+    if (state != QValidator::Acceptable)
+        num = max > 0 ? min : max;
+    input = prefix + copy + suffix;
+    cachedText = input;
+    cachedState = state;
+    cachedValue = QVariant((int)num);
+
+    QSBDEBUG() << "cachedText is set to '" << cachedText << "' state is set to "
+               << state << " and value is set to " << cachedValue;
+    return cachedValue;
+}
+
+// --- QDoubleSpinBoxPrivate ---
+
+/*!
+    \internal
+    Constructs a QSpinBoxPrivate object
+*/
+
+QDoubleSpinBoxPrivate::QDoubleSpinBoxPrivate(QWidget *parent)
+{
+    minimum = QVariant(0.0);
+    maximum = QVariant(99.99);
+    value = minimum;
+    singleStep = QVariant(1.0);
+    decimals = 2;
+    type = QVariant::Double;
+    const QString str = (parent ? parent->locale() : QLocale()).toString(4567.1);
+    if (str.size() == 6) {
+        delimiter = str.at(4);
+        thousand = QChar((ushort)0);
+    } else if (str.size() == 7) {
+        thousand = str.at(1);
+        delimiter = str.at(5);
+    }
+    Q_ASSERT(!delimiter.isNull());
+}
+
+/*!
+    \internal
+    \reimp
+*/
+
+void QDoubleSpinBoxPrivate::emitSignals(EmitPolicy ep, const QVariant &old)
+{
+    Q_Q(QDoubleSpinBox);
+    if (ep != NeverEmit) {
+        pendingEmit = false;
+        if (ep == AlwaysEmit || value != old) {
+            emit q->valueChanged(edit->displayText());
+            emit q->valueChanged(value.toDouble());
+        }
+    }
+}
+
+
+bool QDoubleSpinBoxPrivate::isIntermediateValue(const QString &str) const
+{
+    QSBDEBUG() << "input is" << str << minimum << maximum;
+    qint64 dec = 1;
+    for (int i=0; i<decimals; ++i)
+        dec *= 10;
+
+    const QLatin1Char dot('.');
+
+    // I know QString::number() uses CLocale so I use dot
+    const QString minstr = QString::number(minimum.toDouble(), 'f', decimals);
+    bool ok;
+    qint64 min_left = minstr.left(minstr.indexOf(dot)).toLongLong(&ok);
+    if (!ok)
+        return false;
+    qint64 min_right = minstr.mid(minstr.indexOf(dot) + 1).toLongLong();
+
+    const QString maxstr = QString::number(maximum.toDouble(), 'f', decimals);
+    qint64 max_left = maxstr.left(maxstr.indexOf(dot)).toLongLong(&ok);
+    if (!ok)
+        return true;
+    qint64 max_right = maxstr.mid(maxstr.indexOf(dot) + 1).toLongLong();
+
+    const int dotindex = str.indexOf(delimiter);
+    const bool negative = maximum.toDouble() < 0;
+    qint64 left = 0, right = 0;
+    bool doleft = true;
+    bool doright = true;
+    if (dotindex == -1) {
+        left = str.toLongLong();
+        doright = false;
+    } else if (dotindex == 0 || (dotindex == 1 && str.at(0) == QLatin1Char('+'))) {
+        if (negative) {
+            QSBDEBUG() << __FILE__ << __LINE__ << "returns false";
+            return false;
+        }
+        doleft = false;
+        right = str.mid(dotindex + 1).toLongLong();
+    } else if (dotindex == 1 && str.at(0) == QLatin1Char('-')) {
+        if (!negative) {
+            QSBDEBUG() << __FILE__ << __LINE__ << "returns false";
+            return false;
+        }
+        doleft = false;
+        right = str.mid(dotindex + 1).toLongLong();
+    } else {
+        left = str.left(dotindex).toLongLong();
+        if (dotindex == str.size() - 1) {
+            doright = false;
+        } else {
+            right = str.mid(dotindex + 1).toLongLong();
+        }
+    }
+    if ((left >= 0 && max_left < 0 && !str.startsWith(QLatin1Char('-'))) || (left < 0 && min_left >= 0)) {
+        QSBDEBUG("returns false 0");
+        return false;
+    }
+
+    qint64 match = min_left;
+    if (doleft && !isIntermediateValueHelper(left, min_left, max_left, &match)) {
+        QSBDEBUG() << __FILE__ << __LINE__ << "returns false";
+        return false;
+    }
+    if (doright) {
+        QSBDEBUG("match %lld min_left %lld max_left %lld", match, min_left, max_left);
+        if (!doleft) {
+            if (min_left == max_left) {
+                const bool ret = isIntermediateValueHelper(qAbs(left),
+                                                           negative ? max_right : min_right,
+                                                           negative ? min_right : max_right);
+                QSBDEBUG() << __FILE__ << __LINE__ << "returns" << ret;
+                return ret;
+            } else if (qAbs(max_left - min_left) == 1) {
+                const bool ret = isIntermediateValueHelper(qAbs(left), min_right, negative ? 0 : dec)
+                                 || isIntermediateValueHelper(qAbs(left), negative ? dec : 0, max_right);
+                QSBDEBUG() << __FILE__ << __LINE__ << "returns" << ret;
+                return ret;
+            } else {
+                const bool ret = isIntermediateValueHelper(qAbs(left), 0, dec);
+                QSBDEBUG() << __FILE__ << __LINE__ << "returns" << ret;
+                return ret;
+            }
+        }
+        if (match != min_left) {
+            min_right = negative ? dec : 0;
+        }
+        if (match != max_left) {
+            max_right = negative ? 0 : dec;
+        }
+        qint64 tmpl = negative ? max_right : min_right;
+        qint64 tmpr = negative ? min_right : max_right;
+        const bool ret = isIntermediateValueHelper(right, tmpl, tmpr);
+        QSBDEBUG() << __FILE__ << __LINE__ << "returns" << ret;
+        return ret;
+    }
+    QSBDEBUG() << __FILE__ << __LINE__ << "returns true";
+    return true;
+}
+
+/*!
+    \internal
+    \reimp
+*/
+QVariant QDoubleSpinBoxPrivate::valueFromText(const QString &f) const
+{
+    Q_Q(const QDoubleSpinBox);
+    return QVariant(q->valueFromText(f));
+}
+
+/*!
+    \internal
+    Rounds to a double value that is restricted to decimals.
+    E.g. // decimals = 2
+
+    round(5.555) => 5.56
+    */
+
+double QDoubleSpinBoxPrivate::round(double value) const
+{
+    Q_Q(const QDoubleSpinBox);
+    const QString strDbl = q->locale().toString(value, 'f', decimals);
+    return q->locale().toDouble(strDbl);
+}
+
+
+/*!
+    \internal Multi purpose function that parses input, sets state to
+    the appropriate state and returns the value it will be interpreted
+    as.
+*/
+
+QVariant QDoubleSpinBoxPrivate::validateAndInterpret(QString &input, int &pos,
+                                                     QValidator::State &state) const
+{
+    if (cachedText == input && !input.isEmpty()) {
+        state = cachedState;
+        QSBDEBUG() << "cachedText was" << "'" << cachedText << "'" << "state was "
+                   << state << " and value was " << cachedValue;
+        return cachedValue;
+    }
+    const double max = maximum.toDouble();
+    const double min = minimum.toDouble();
+
+    QString copy = stripped(input, &pos);
+    QSBDEBUG() << "input" << input << "copy" << copy;
+    int len = copy.size();
+    double num = min;
+    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) == delimiter
+            || (plus && copy.at(0) == QLatin1Char('+'))
+            || (minus && copy.at(0) == QLatin1Char('-'))) {
+            state = QValidator::Intermediate;
+            goto end;
+        }
+        break;
+    case 2:
+        if (copy.at(1) == delimiter
+            && ((plus && copy.at(0) == QLatin1Char('+')) || (minus && copy.at(0) == QLatin1Char('-')))) {
+            state = QValidator::Intermediate;
+            goto end;
+        }
+        break;
+    default: break;
+    }
+
+    if (copy.at(0) == thousand) {
+        QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+        state = QValidator::Invalid;
+        goto end;
+    } else if (len > 1) {
+        const int dec = copy.indexOf(delimiter);
+        if (dec != -1) {
+            if (dec + 1 < copy.size() && copy.at(dec + 1) == delimiter && pos == dec + 1) {
+                copy.remove(dec + 1, 1); // typing a delimiter when you are on the delimiter
+            } // should be treated as typing right arrow
+
+            if (copy.size() - dec > decimals + 1) {
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                state = QValidator::Invalid;
+                goto end;
+            }
+            for (int i=dec + 1; i<copy.size(); ++i) {
+                if (copy.at(i).isSpace() || copy.at(i) == thousand) {
+                    QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                    state = QValidator::Invalid;
+                    goto end;
+                }
+            }
+        } else {
+            const QChar &last = copy.at(len - 1);
+            const QChar &secondLast = copy.at(len - 2);
+            if ((last == thousand || last.isSpace())
+                && (secondLast == thousand || secondLast.isSpace())) {
+                state = QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                goto end;
+            } else if (last.isSpace() && (!thousand.isSpace() || secondLast.isSpace())) {
+                state = QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                goto end;
+            }
+        }
+    }
+
+    {
+        bool ok = false;
+        QLocale loc(q_func()->locale());
+        num = loc.toDouble(copy, &ok);
+        QSBDEBUG() << __FILE__ << __LINE__ << loc << copy << num << ok;
+        bool notAcceptable = false;
+
+        if (!ok) {
+            if (thousand.isPrint()) {
+                if (max < 1000 && min > -1000 && copy.contains(thousand)) {
+                    state = QValidator::Invalid;
+                    QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                    goto end;
+                }
+
+                const int len = copy.size();
+                for (int i=0; i<len- 1; ++i) {
+                    if (copy.at(i) == thousand && copy.at(i + 1) == thousand) {
+                        QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                        state = QValidator::Invalid;
+                        goto end;
+                    }
+                }
+
+                const int s = copy.size();
+                copy.remove(thousand);
+                pos = qMax(0, pos - (s - copy.size()));
+
+
+                num = loc.toDouble(copy, &ok);
+                QSBDEBUG() << thousand << num << copy << ok;
+
+                if (!ok) {
+                    state = QValidator::Invalid;
+                    QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+                    goto end;
+                }
+                notAcceptable = true;
+            }
+        }
+
+        if (!ok) {
+            state = QValidator::Invalid;
+            QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+        } else if (num >= min && num <= max) {
+            state = notAcceptable ? QValidator::Intermediate : QValidator::Acceptable;
+            QSBDEBUG() << __FILE__ << __LINE__<< "state is set to "
+                       << (state == QValidator::Intermediate ? "Intermediate" : "Acceptable");
+        } else if (max == min) { // when max and min is the same the only non-Invalid input is max (or min)
+            state = QValidator::Invalid;
+            QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+        } else {
+            if ((num >= 0 && num > max) || (num < 0 && num < min)) {
+                state = QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to Invalid";
+            } else {
+                state = isIntermediateValue(copy) ? QValidator::Intermediate : QValidator::Invalid;
+                QSBDEBUG() << __FILE__ << __LINE__<< "state is set to "
+                           << (state == QValidator::Intermediate ? "Intermediate" : "Acceptable");
+            }
+        }
+    }
+
+end:
+    if (state != QValidator::Acceptable) {
+        num = max > 0 ? min : max;
+    }
+
+    input = prefix + copy + suffix;
+    cachedText = input;
+    cachedState = state;
+    cachedValue = QVariant(num);
+    return QVariant(num);
+}
+
+/*
+    \internal
+    \reimp
+*/
+
+QString QDoubleSpinBoxPrivate::textFromValue(const QVariant &f) const
+{
+    Q_Q(const QDoubleSpinBox);
+    return q->textFromValue(f.toDouble());
+}
+
+/*!
+    \fn void QSpinBox::setLineStep(int step)
+
+    Use setSingleStep() instead.
+*/
+
+/*!
+    \fn void QSpinBox::setMaxValue(int value)
+
+    Use setMaximum() instead.
+*/
+
+/*!
+    \fn void QSpinBox::setMinValue(int value)
+
+    Use setMinimum() instead.
+*/
+
+/*!
+    \fn int QSpinBox::maxValue() const
+
+    Use maximum() instead.
+*/
+
+/*!
+    \fn int QSpinBox::minValue() const
+
+    Use minimum() instead.
+*/
+
+/*!
+    \internal Returns whether \a str is a string which value cannot be
+    parsed but still might turn into something valid.
+*/
+
+static bool isIntermediateValueHelper(qint64 num, qint64 min, qint64 max, qint64 *match)
+{
+    QSBDEBUG("%lld %lld %lld", num, min, max);
+
+    if (num >= min && num <= max) {
+        if (match)
+            *match = num;
+        QSBDEBUG("returns true 0");
+        return true;
+    }
+    qint64 tmp = num;
+
+    int numDigits = 0;
+    int digits[10];
+    if (tmp == 0) {
+        numDigits = 1;
+        digits[0] = 0;
+    } else {
+        tmp = qAbs(num);
+        for (int i=0; tmp > 0; ++i) {
+            digits[numDigits++] = tmp % 10;
+            tmp /= 10;
+        }
+    }
+
+    int failures = 0;
+    qint64 number;
+    for (number=max; number>=min; --number) {
+        tmp = qAbs(number);
+        for (int i=0; tmp > 0;) {
+            if (digits[i] == (tmp % 10)) {
+                if (++i == numDigits) {
+                    if (match)
+                        *match = number;
+                    QSBDEBUG("returns true 1");
+                    return true;
+                }
+            }
+            tmp /= 10;
+        }
+        if (failures++ == 500000) { //upper bound
+            if (match)
+                *match = num;
+            QSBDEBUG("returns true 2");
+            return true;
+        }
+    }
+    QSBDEBUG("returns false");
+    return false;
+}
+
+/*! \reimp */
+bool QSpinBox::event(QEvent *event)
+{
+    Q_D(QSpinBox);
+    if (event->type() == QEvent::StyleChange
+#ifdef Q_WS_MAC
+            || event->type() == QEvent::MacSizeChange
+#endif
+            )
+        d->setLayoutItemMargins(QStyle::SE_SpinBoxLayoutItem);
+    return QAbstractSpinBox::event(event);
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_SPINBOX