qabstractspinbox.cpp

奇趣公司比较新的qt/emd版本

    reset();
    if (q && (q->stepEnabled() & (up ? QAbstractSpinBox::StepUpEnabled
                                  : QAbstractSpinBox::StepDownEnabled))) {
        spinClickThresholdTimerId = q->startTimer(spinClickThresholdTimerInterval);
        buttonState = (up ? (Mouse | Up) : (Mouse | Down));
        q->stepBy(up ? 1 : -1);
    }
}


/*!
    Initialize \a option with the values from this QSpinBox. This method
    is useful for subclasses when they need a QStyleOptionSpinBox, but don't want
    to fill in all the information themselves.

    \sa QStyleOption::initFrom()
*/
void QAbstractSpinBox::initStyleOption(QStyleOptionSpinBox *option) const
{
    if (!option)
        return;

    Q_D(const QAbstractSpinBox);
    option->initFrom(this);
    option->activeSubControls = QStyle::SC_None;
    option->buttonSymbols = d->buttonSymbols;
    option->subControls = QStyle::SC_SpinBoxFrame;
    if (d->buttonSymbols != QAbstractSpinBox::NoButtons) {
        option->subControls |= QStyle::SC_SpinBoxUp | QStyle::SC_SpinBoxDown;
        if (d->buttonState & Up) {
            option->activeSubControls = QStyle::SC_SpinBoxUp;
        } else if (d->buttonState & Down) {
            option->activeSubControls = QStyle::SC_SpinBoxDown;
        }
    }

    if (d->buttonState) {
        option->state |= QStyle::State_Sunken;
    } else {
        option->activeSubControls = d->hoverControl;
    }

    option->stepEnabled = style()->styleHint(QStyle::SH_SpinControls_DisableOnBounds)
                      ? stepEnabled()
                      : (QAbstractSpinBox::StepDownEnabled|QAbstractSpinBox::StepUpEnabled);

    option->frame = d->frame;
}

/*!
    \internal

    Bounds \a val to be within minimum and maximum. Also tries to be
    clever about setting it at min and max depending on what it was
    and what direction it was changed etc.
*/

QVariant QAbstractSpinBoxPrivate::bound(const QVariant &val, const QVariant &old, int steps) const
{
    QVariant v = val;
    if (!wrapping || steps == 0 || old.isNull()) {
        if (variantCompare(v, minimum) < 0) {
            v = wrapping ? maximum : minimum;
        }
        if (variantCompare(v, maximum) > 0) {
            v = wrapping ? minimum : maximum;
        }
    } else {
        const bool wasMin = old == minimum;
        const bool wasMax = old == maximum;
        const int oldcmp = variantCompare(v, old);
        const int maxcmp = variantCompare(v, maximum);
        const int mincmp = variantCompare(v, minimum);
        const bool wrapped = (oldcmp > 0 && steps < 0) || (oldcmp < 0 && steps > 0);
        if (maxcmp > 0) {
            v = ((wasMax && !wrapped && steps > 0) || (steps < 0 && !wasMin && wrapped))
                ? minimum : maximum;
        } else if (wrapped && (maxcmp > 0 || mincmp < 0)) {
            v = (wasMax && steps > 0 || (!wasMin && steps < 0)) ? minimum : maximum;
        } else if (mincmp < 0) {
            v = (!wasMax && !wasMin ? minimum : maximum);
        }
    }

    return v;
}

/*!
    \internal

    Sets the value of the spin box to \a val. Depending on the value
    of \a ep it will also emit signals.
*/

void QAbstractSpinBoxPrivate::setValue(const QVariant &val, EmitPolicy ep,
                                       bool doUpdate)
{
    Q_Q(QAbstractSpinBox);
    const QVariant old = value;
    value = bound(val);
    pendingEmit = false;
    if (doUpdate) {
        updateEdit();
    }
    q->update();

    if (ep == AlwaysEmit || (ep == EmitIfChanged && old != value)) {
        emitSignals(ep, old);
    }
}

/*!
    \internal

    Updates the line edit to reflect the current value of the spin box.
*/

void QAbstractSpinBoxPrivate::updateEdit()
{
    Q_Q(QAbstractSpinBox);
    if (type == QVariant::Invalid)
        return;
    const QString newText = specialValue() ? specialValueText : prefix + textFromValue(value) + suffix;
    if (newText == edit->displayText())
        return;

    const bool empty = edit->text().isEmpty();
    int cursor = edit->cursorPosition();
    int selsize = edit->selectedText().size();
    const bool sb = edit->blockSignals(true);
    edit->setText(newText);

    if (!specialValue()) {
        cursor = qBound(prefix.size(), cursor, edit->displayText().size() - suffix.size());

        if (selsize > 0) {
            edit->setSelection(cursor, selsize);
        } else {
            edit->setCursorPosition(empty ? prefix.size() : cursor);
        }
    }
    edit->blockSignals(sb);
    q->update();
}

/*!
    \internal

    Convenience function to set min/max values.
*/

void QAbstractSpinBoxPrivate::setRange(const QVariant &min, const QVariant &max)
{
    clearCache();
    minimum = min;
    maximum = (variantCompare(min, max) < 0 ? max : min);

    reset();
    if (!(bound(value) == value)) {
        setValue(bound(value), EmitIfChanged);
    } else if (value == minimum && !specialValueText.isEmpty()) {
        updateEdit();
    }
}

/*!
    \internal

    Convenience function to get a variant of the right type.
*/

QVariant QAbstractSpinBoxPrivate::getZeroVariant() const
{
    QVariant ret;
    switch (type) {
    case QVariant::Int: ret = QVariant((int)0); break;
    case QVariant::Double: ret = QVariant((double)0.0); break;
    case QVariant::Time: ret = QVariant(QTime()); break;
    case QVariant::Date: ret = QVariant(QDATETIMEEDIT_DATE_INITIAL); break;
    case QVariant::DateTime: ret = QVariant(QDateTime(QDATETIMEEDIT_DATE_INITIAL, QTime())); break;
    default: break;
    }
    return ret;
}

/*!
    \internal

    Virtual method called that calls the public textFromValue()
    functions in the subclasses. Needed to change signature from
    QVariant to int/double/QDateTime etc. Used when needing to display
    a value textually.

    This method is reimeplemented in the various subclasses.
*/

QString QAbstractSpinBoxPrivate::textFromValue(const QVariant &) const
{
    return QString();
}

/*!
    \internal

    Virtual method called that calls the public valueFromText()
    functions in the subclasses. Needed to change signature from
    QVariant to int/double/QDateTime etc. Used when needing to
    interpret a string as another type.

    This method is reimeplemented in the various subclasses.
*/

QVariant QAbstractSpinBoxPrivate::valueFromText(const QString &) const
{
    return QVariant();
}
/*!
    \internal

    Interprets text and emits signals. Called when the spinbox needs
    to interpret the text on the lineedit.
*/

void QAbstractSpinBoxPrivate::interpret(EmitPolicy ep)
{
    Q_Q(QAbstractSpinBox);
    if (type == QVariant::Invalid)
        return;

    QVariant v = getZeroVariant();
    bool doInterpret = true;
    QString tmp = edit->displayText();
    int pos = edit->cursorPosition();
    const int oldpos = pos;

    if (q->validate(tmp, pos) != QValidator::Acceptable) {
        const QString copy = tmp;
        q->fixup(tmp);
        QASBDEBUG() << "QAbstractSpinBoxPrivate::interpret() text '"
                    << edit->displayText()
                    << "' >> '" << copy << "'"
                    << "' >> '" << tmp << "'";

        doInterpret = tmp != copy && (q->validate(tmp, pos) == QValidator::Acceptable);
        if (!doInterpret) {
            v = (correctionMode == QAbstractSpinBox::CorrectToNearestValue
                 ? variantBound(minimum, v, maximum) : value);
        }
    }
    if (doInterpret) {
        v = valueFromText(tmp);
    }
    clearCache();
    setValue(v, ep, true);
    if (oldpos != pos)
        edit->setCursorPosition(pos);
}

void QAbstractSpinBoxPrivate::clearCache() const
{
    cachedText.clear();
    cachedValue.clear();
    cachedState = QValidator::Acceptable;
}


// --- QSpinBoxValidator ---

/*!
    \internal
    Constructs a QSpinBoxValidator object
*/

QSpinBoxValidator::QSpinBoxValidator(QAbstractSpinBox *qp, QAbstractSpinBoxPrivate *dp)
    : QValidator(qp), qptr(qp), dptr(dp)
{
    setObjectName(QLatin1String("qt_spinboxvalidator"));
}

/*!
    \internal

    Checks for specialValueText, prefix, suffix and calls
    the virtual QAbstractSpinBox::validate function.
*/

QValidator::State QSpinBoxValidator::validate(QString &input, int &pos) const
{
    if (dptr->specialValueText.size() > 0 && input == dptr->specialValueText)
        return QValidator::Acceptable;

    if (!dptr->prefix.isEmpty() && !input.startsWith(dptr->prefix))
        input.prepend(dptr->prefix);

    if (!dptr->suffix.isEmpty() && !input.endsWith(dptr->suffix))
        input.append(dptr->suffix);

    return qptr->validate(input, pos);
}
/*!
    \internal
    Calls the virtual QAbstractSpinBox::fixup function.
*/

void QSpinBoxValidator::fixup(QString &input) const
{
    qptr->fixup(input);
}

// --- global ---

/*!
    \internal
    Adds two variants together and returns the result.
*/

QVariant operator+(const QVariant &arg1, const QVariant &arg2)
{
    QVariant ret;
    if (arg1.type() != arg2.type())
        qWarning("QAbstractSpinBox: Internal error: Different types (%s vs %s) (%s:%d)",
                 arg1.typeName(), arg2.typeName(), __FILE__, __LINE__);
    switch (arg1.type()) {
    case QVariant::Int: ret = QVariant(arg1.toInt() + arg2.toInt()); break;
    case QVariant::Double: ret = QVariant(arg1.toDouble() + arg2.toDouble()); break;
    case QVariant::DateTime: {
        QDateTime a2 = arg2.toDateTime();
        QDateTime a1 = arg1.toDateTime().addDays(QDATETIMEEDIT_DATETIME_MIN.daysTo(a2));
        a1.setTime(a1.time().addMSecs(QTime().msecsTo(a2.time())));
        ret = QVariant(a1);
    }
    default: break;
    }
    return ret;
}


/*!
    \internal
    Subtracts two variants and returns the result.
*/

QVariant operator-(const QVariant &arg1, const QVariant &arg2)
{
    QVariant ret;
    if (arg1.type() != arg2.type())
        qWarning("QAbstractSpinBox: Internal error: Different types (%s vs %s) (%s:%d)",
                 arg1.typeName(), arg2.typeName(), __FILE__, __LINE__);
    switch (arg1.type()) {
    case QVariant::Int: ret = QVariant(arg1.toInt() - arg2.toInt()); break;
    case QVariant::Double: ret = QVariant(arg1.toDouble() - arg2.toDouble()); break;
    case QVariant::DateTime: {
        QDateTime a1 = arg1.toDateTime();
        QDateTime a2 = arg2.toDateTime();
        int days = a2.daysTo(a1);
        int secs = a2.secsTo(a1);
        int msecs = qMax(0, a1.time().msec() - a2.time().msec());
        if (days < 0 || secs < 0 || msecs < 0) {
            ret = arg1;
        } else {
            QDateTime dt = a2.addDays(days).addSecs(secs);
            if (msecs > 0)
                dt.setTime(dt.time().addMSecs(msecs));
            ret = QVariant(dt);
        }
    }
    default: break;
    }
    return ret;
}

/*!
    \internal
    Multiplies \a arg1 by \a multiplier and returns the result.
*/

QVariant operator*(const QVariant &arg1, double multiplier)
{
    QVariant ret;

    switch (arg1.type()) {
    case QVariant::Int: ret = QVariant((int)(arg1.toInt() * multiplier)); break;
    case QVariant::Double: ret = QVariant(arg1.toDouble() * multiplier); break;
    case QVariant::DateTime: {
        double days = QDATETIMEEDIT_DATE_MIN.daysTo(arg1.toDateTime().date()) * multiplier;
        int daysInt = (int)days;
        days -= daysInt;
        long msecs = (long)((QDATETIMEEDIT_TIME_MIN.msecsTo(arg1.toDateTime().time()) * multiplier)
                            + (days * (24 * 3600 * 1000)));
        ret = QDateTime(QDate().addDays(int(days)), QTime().addMSecs(msecs));
        break;
    }
    default: ret = arg1; break;
    }

    return ret;
}



double operator/(const QVariant &arg1, const QVariant &arg2)
{
    double a1 = 0;
    double a2 = 0;

    switch (arg1.type()) {
    case QVariant::Int:
        a1 = (double)arg1.toInt();
        a2 = (double)arg2.toInt();
        break;
    case QVariant::Double:
        a1 = arg1.toDouble();
        a2 = arg2.toDouble();
        break;
    case QVariant::DateTime:
        a1 = QDATETIMEEDIT_DATE_MIN.daysTo(arg1.toDate());
        a2 = QDATETIMEEDIT_DATE_MIN.daysTo(arg2.toDate());
        a1 += (double)QDATETIMEEDIT_TIME_MIN.msecsTo(arg1.toDateTime().time()) / (long)(3600 * 24 * 1000);
        a2 += (double)QDATETIMEEDIT_TIME_MIN.msecsTo(arg2.toDateTime().time()) / (long)(3600 * 24 * 1000);
    default: break;
    }

    return (a1 != 0 && a2 != 0) ? (a1 / a2) : 0.0;
}

int QAbstractSpinBoxPrivate::variantCompare(const QVariant &arg1, const QVariant &arg2)
{
    switch (arg2.type()) {
    case QVariant::Date:
        Q_ASSERT_X(arg1.type() == QVariant::Date, "QAbstractSpinBoxPrivate::variantCompare",
                   qPrintable(QString::fromAscii("Internal error 1 (%1)").
                              arg(QString::fromAscii(arg1.typeName()))));
        if (arg1.toDate() == arg2.toDate()) {
            return 0;
        } else if (arg1.toDate() < arg2.toDate()) {
            return -1;
        } else {
            return 1;
        }
    case QVariant::Time:
        Q_ASSERT_X(arg1.type() == QVariant::Time, "QAbstractSpinBoxPrivate::variantCompare",
                   qPrintable(QString::fromAscii("Internal error 2 (%1)").
                              arg(QString::fromAscii(arg1.typeName()))));
        if (arg1.toTime() == arg2.toTime()) {
            return 0;
        } else if (arg1.toTime() < arg2.toTime()) {
            return -1;
        } else {
            return 1;
        }


    case QVariant::DateTime:
        if (arg1.toDateTime() == arg2.toDateTime()) {
            return 0;
        } else if (arg1.toDateTime() < arg2.toDateTime()) {
            return -1;
        } else {
            return 1;
        }
    case QVariant::Int:
        if (arg1.toInt() == arg2.toInt()) {
            return 0;
        } else if (arg1.toInt() < arg2.toInt()) {
            return -1;
        } else {
            return 1;
        }
    case QVariant::Double:
        if (arg1.toDouble() == arg2.toDouble()) {
            return 0;
        } else if (arg1.toDouble() < arg2.toDouble()) {
            return -1;
        } else {
            return 1;
        }
    case QVariant::Invalid:
        if (arg2.type() == QVariant::Invalid)
            return 0;
    default:
        Q_ASSERT_X(0, "QAbstractSpinBoxPrivate::variantCompare",
                   qPrintable(QString::fromAscii("Internal error 3 (%1 %2)").
                              arg(QString::fromAscii(arg1.typeName())).
                              arg(QString::fromAscii(arg2.typeName()))));
    }
    return -2;
}

QVariant QAbstractSpinBoxPrivate::variantBound(const QVariant &min,
                                               const QVariant &value,
                                               const QVariant &max)
{
    Q_ASSERT(variantCompare(min, max) <= 0);
    if (variantCompare(min, value) < 0) {
        const int compMax = variantCompare(value, max);
        return (compMax < 0 ? value : max);
    } else {
        return min;
    }
}

#include "moc_qabstractspinbox.cpp"
#endif // QT_NO_SPINBOX