qtpropertymanager.cpp

    The subproperties are created by a QtDoublePropertyManager object. This
    manager can be retrieved using the subDoublePropertyManager() function. In
    order to provide editing widgets for the subproperties in a
    property browser widget, this manager must be associated with an
    editor factory.

    A size property also has a range of valid values defined by a
    minimum size and a maximum size. These sizes can be retrieved
    using the minimum() and the maximum() functions, and set using the
    setMinimum() and setMaximum() slots. Alternatively, the range can
    be defined in one go using the setRange() slot.

    In addition, QtSizeFPropertyManager provides the valueChanged() signal
    which is emitted whenever a property created by this manager
    changes, and the rangeChanged() signal which is emitted whenever
    such a property changes its range of valid sizes.

    \sa QtAbstractPropertyManager, QtDoublePropertyManager, QtSizePropertyManager
*/

/**
    \fn void QtSizeFPropertyManager::valueChanged(QtProperty *property, const QSizeF &value)

    This signal is emitted whenever a property created by this manager
    changes its value, passing a pointer to the \a property and the new
    \a value as parameters.

    \sa setValue()
*/

/**
    \fn void QtSizeFPropertyManager::rangeChanged(QtProperty *property, const QSizeF &minimum, const QSizeF &maximum)

    This signal is emitted whenever a property created by this manager
    changes its range of valid sizes, passing a pointer to the \a
    property and the new \a minimum and \a maximum sizes.

    \sa setRange()
*/

/**
    \fn void QtSizeFPropertyManager::decimalsChanged(QtProperty *property, int prec)

    This signal is emitted whenever a property created by this manager
    changes its precision of value, passing a pointer to the
    \a property and the new \a prec value

    \sa setDecimals()
*/

/**
    Creates a manager with the given \a parent.
*/
QtSizeFPropertyManager::QtSizeFPropertyManager(QObject *parent)
    : QtAbstractPropertyManager(parent)
{
    d_ptr = new QtSizeFPropertyManagerPrivate;
    d_ptr->q_ptr = this;

    d_ptr->m_doublePropertyManager = new QtDoublePropertyManager(this);
    connect(d_ptr->m_doublePropertyManager, SIGNAL(valueChanged(QtProperty *, double)),
                this, SLOT(slotDoubleChanged(QtProperty *, double)));
    connect(d_ptr->m_doublePropertyManager, SIGNAL(propertyDestroyed(QtProperty *)),
                this, SLOT(slotPropertyDestroyed(QtProperty *)));
}

/**
    Destroys this manager, and all the properties it has created.
*/
QtSizeFPropertyManager::~QtSizeFPropertyManager()
{
    clear();
    delete d_ptr;
}

/**
    Returns the manager that creates the nested \e width and \e height
    subproperties.

    In order to provide editing widgets for the \e width and \e height
    properties in a property browser widget, this manager must be
    associated with an editor factory.

    \sa QtAbstractPropertyBrowser::setFactoryForManager()
*/
QtDoublePropertyManager *QtSizeFPropertyManager::subDoublePropertyManager() const
{
    return d_ptr->m_doublePropertyManager;
}

/**
    Returns the given \a property's value.

    If the given \a property is not managed by this manager, this
    function returns an invalid size

    \sa setValue()
*/
QSizeF QtSizeFPropertyManager::value(const QtProperty *property) const
{
    return getValue<QSizeF>(d_ptr->m_values, property);
}

/**
    Returns the given \a property's precision, in decimals.

    \sa setDecimals()
*/
int QtSizeFPropertyManager::decimals(const QtProperty *property) const
{
    return getData<int>(d_ptr->m_values, &QtSizeFPropertyManagerPrivate::Data::decimals, property, 0);
}

/**
    Returns the given \a property's minimum size value.

    \sa setMinimum(), maximum(), setRange()
*/
QSizeF QtSizeFPropertyManager::minimum(const QtProperty *property) const
{
    return getMinimum<QSizeF>(d_ptr->m_values, property);
}

/**
    Returns the given \a property's maximum size value.

    \sa setMaximum(), minimum(), setRange()
*/
QSizeF QtSizeFPropertyManager::maximum(const QtProperty *property) const
{
    return getMaximum<QSizeF>(d_ptr->m_values, property);
}

/**
    \reimp
*/
QString QtSizeFPropertyManager::valueText(const QtProperty *property) const
{
    const QtSizeFPropertyManagerPrivate::PropertyValueMap::const_iterator it = d_ptr->m_values.constFind(property);
    if (it == d_ptr->m_values.constEnd())
        return QString();
    const QSizeF v = it.value().val;
    const int dec = it.value().decimals;
    return QString(tr("%1 x %2").arg(QString::number(v.width(), 'f', dec))
                                .arg(QString::number(v.height(), 'f', dec)));
}

/**
    \fn void QtSizeFPropertyManager::setValue(QtProperty *property, const QSizeF &value)

    Sets the value of the given \a property to \a value.

    If the specified \a value is not valid according to the given \a
    property's size range, the \a value is adjusted to the nearest
    valid value within the size range.

    \sa value(), setRange(), valueChanged()
*/
void QtSizeFPropertyManager::setValue(QtProperty *property, const QSizeF &val)
{
    setValueInRange<const QSizeF &, QtSizeFPropertyManagerPrivate, QtSizeFPropertyManager, QSizeF>(this, d_ptr,
                &QtSizeFPropertyManager::propertyChanged,
                &QtSizeFPropertyManager::valueChanged,
                property, val, &QtSizeFPropertyManagerPrivate::setValue);
}

/**
    \fn void QtSizeFPropertyManager::setDecimals(QtProperty *property, int prec)

    Sets the precision of the given \a property to \a prec.

    The valid decimal range is 0-13. The default is 2.

    \sa decimals()
*/
void QtSizeFPropertyManager::setDecimals(QtProperty *property, int prec)
{
    const QtSizeFPropertyManagerPrivate::PropertyValueMap::iterator it = d_ptr->m_values.find(property);
    if (it == d_ptr->m_values.end())
        return;

    QtSizeFPropertyManagerPrivate::Data data = it.value();

    if (prec > 13)
        prec = 13;
    else if (prec < 0)
        prec = 0;

    if (data.decimals == prec)
        return;

    data.decimals = prec;
    d_ptr->m_doublePropertyManager->setDecimals(d_ptr->m_propertyToW[property], prec);
    d_ptr->m_doublePropertyManager->setDecimals(d_ptr->m_propertyToH[property], prec);

    it.value() = data;

    emit decimalsChanged(property, data.decimals);
}

/**
    Sets the minimum size value for the given \a property to \a minVal.

    When setting the minimum size value, the maximum and current
    values are adjusted if necessary (ensuring that the size range
    remains valid and that the current value is within the range).

    \sa minimum(), setRange(), rangeChanged()
*/
void QtSizeFPropertyManager::setMinimum(QtProperty *property, const QSizeF &minVal)
{
    setBorderValue<const QSizeF &, QtSizeFPropertyManagerPrivate, QtSizeFPropertyManager, QSizeF, QtSizeFPropertyManagerPrivate::Data>(this, d_ptr,
                &QtSizeFPropertyManager::propertyChanged,
                &QtSizeFPropertyManager::valueChanged,
                &QtSizeFPropertyManager::rangeChanged,
                property,
                &QtSizeFPropertyManagerPrivate::Data::minimumValue,
                &QtSizeFPropertyManagerPrivate::Data::setMinimumValue,
                minVal, &QtSizeFPropertyManagerPrivate::setRange);
}

/**
    Sets the maximum size value for the given \a property to \a maxVal.

    When setting the maximum size value, the minimum and current
    values are adjusted if necessary (ensuring that the size range
    remains valid and that the current value is within the range).

    \sa maximum(), setRange(), rangeChanged()
*/
void QtSizeFPropertyManager::setMaximum(QtProperty *property, const QSizeF &maxVal)
{
    setBorderValue<const QSizeF &, QtSizeFPropertyManagerPrivate, QtSizeFPropertyManager, QSizeF, QtSizeFPropertyManagerPrivate::Data>(this, d_ptr,
                &QtSizeFPropertyManager::propertyChanged,
                &QtSizeFPropertyManager::valueChanged,
                &QtSizeFPropertyManager::rangeChanged,
                property,
                &QtSizeFPropertyManagerPrivate::Data::maximumValue,
                &QtSizeFPropertyManagerPrivate::Data::setMaximumValue,
                maxVal, &QtSizeFPropertyManagerPrivate::setRange);
}

/**
    \fn void QtSizeFPropertyManager::setRange(QtProperty *property, const QSizeF &minimum, const QSizeF &maximum)

    Sets the range of valid values.

    This is a convenience function defining the range of valid values
    in one go; setting the \a minimum and \a maximum values for the
    given \a property with a single function call.

    When setting a new range, the current value is adjusted if
    necessary (ensuring that the value remains within the range).

    \sa  setMinimum(), setMaximum(), rangeChanged()
*/
void QtSizeFPropertyManager::setRange(QtProperty *property, const QSizeF &minVal, const QSizeF &maxVal)
{
    setBorderValues<const QSizeF &, QtSizeFPropertyManagerPrivate, QtSizeFPropertyManager, QSizeF>(this, d_ptr,
                &QtSizeFPropertyManager::propertyChanged,
                &QtSizeFPropertyManager::valueChanged,
                &QtSizeFPropertyManager::rangeChanged,
                property, minVal, maxVal, &QtSizeFPropertyManagerPrivate::setRange);
}

/**
    \reimp
*/
void QtSizeFPropertyManager::initializeProperty(QtProperty *property)
{
    d_ptr->m_values[property] = QtSizeFPropertyManagerPrivate::Data();

    QtProperty *wProp = d_ptr->m_doublePropertyManager->addProperty();
    wProp->setPropertyName(tr("Width"));
    d_ptr->m_doublePropertyManager->setDecimals(wProp, decimals(property));
    d_ptr->m_doublePropertyManager->setValue(wProp, 0);
    d_ptr->m_doublePropertyManager->setMinimum(wProp, 0);
    d_ptr->m_propertyToW[property] = wProp;
    d_ptr->m_wToProperty[wProp] = property;
    property->addSubProperty(wProp);

    QtProperty *hProp = d_ptr->m_doublePropertyManager->addProperty();
    hProp->setPropertyName(tr("Height"));
    d_ptr->m_doublePropertyManager->setDecimals(hProp, decimals(property));
    d_ptr->m_doublePropertyManager->setValue(hProp, 0);
    d_ptr->m_doublePropertyManager->setMinimum(hProp, 0);
    d_ptr->m_propertyToH[property] = hProp;
    d_ptr->m_hToProperty[hProp] = property;
    property->addSubProperty(hProp);
}

/**
    \reimp
*/
void QtSizeFPropertyManager::uninitializeProperty(QtProperty *property)
{
    QtProperty *wProp = d_ptr->m_propertyToW[property];
    if (wProp) {
        d_ptr->m_wToProperty.remove(wProp);
        delete wProp;
    }
    d_ptr->m_propertyToW.remove(property);

    QtProperty *hProp = d_ptr->m_propertyToH[property];
    if (hProp) {
        d_ptr->m_hToProperty.remove(hProp);
        delete hProp;
    }
    d_ptr->m_propertyToH.remove(property);

    d_ptr->m_values.remove(property);
}

// QtRectPropertyManager

void QtRectPropertyManagerPrivate::slotIntChanged(QtProperty *property, int value)
{
    if (QtProperty *prop = m_xToProperty.value(property, 0)) {
        QRect r = m_values[prop].val;
        r.moveLeft(value);
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_yToProperty.value(property)) {
        QRect r = m_values[prop].val;
        r.moveTop(value);
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_wToProperty.value(property, 0)) {
        Data data = m_values[prop];
        QRect r = data.val;
        r.setWidth(value);
        if (!data.constraint.isNull() && data.constraint.x() + data.constraint.width() < r.x() + r.width()) {
            r.moveLeft(data.constraint.left() + data.constraint.width() - r.width());
        }
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_hToProperty.value(property, 0)) {
        Data data = m_values[prop];
        QRect r = data.val;
        r.setHeight(value);
        if (!data.constraint.isNull() && data.constraint.y() + data.constraint.height() < r.y() + r.height()) {
            r.moveTop(data.constraint.top() + data.constraint.height() - r.height());
        }
        q_ptr->setValue(prop, r);
    }
}

void QtRectPropertyManagerPrivate::slotPropertyDestroyed(QtProperty *property)
{
    if (QtProperty *pointProp = m_xToProperty.value(property, 0)) {
        m_propertyToX[pointProp] = 0;
        m_xToProperty.remove(property);
    } else if (QtProperty *pointProp = m_yToProperty.value(property, 0)) {
        m_propertyToY[pointProp] = 0;
        m_yToProperty.remove(property);
    } else if (QtProperty *pointProp = m_wToProperty.value(property, 0)) {
        m_propertyToW[pointProp] = 0;
        m_wToProperty.remove(property);
    } else if (QtProperty *pointProp = m_hToProperty.value(property, 0)) {
        m_propertyToH[pointProp] = 0;
        m_hToProperty.remove(property);
    }
}

void QtRectPropertyManagerPrivate::setConstraint(QtProperty *property,
            const QRect &constraint, const QRect &val)
{
    const bool isNull = constraint.isNull();
    const int left   = isNull ? INT_MIN : constraint.left();
    const int right  = isNull ? INT_MAX : constraint.left() + constraint.width();
    const int top    = isNull ? INT_MIN : constraint.top();
    const int bottom = isNull ? INT_MAX : constraint.top() + constraint.height();
    const int width  = isNull ? INT_MAX : constraint.width();
    const int height = isNull ? INT_MAX : constraint.height();

    m_intPropertyManager->setRange(m_propertyToX[property], left, right);
    m_intPropertyManager->setRange(m_propertyToY[property], top, bottom);
    m_intPropertyManager->setRange(m_propertyToW[property], 0, width);
    m_intPropertyManager->setRange(m_propertyToH[property], 0, height);

    m_intPropertyManager->setValue(m_propertyToX[property], val.x());
    m_intPropertyManager->setValue(m_propertyToY[property], val.y());
    m_intPropertyManager->setValue(m_propertyToW[property], val.width());
    m_intPropertyManager->setValue(m_propertyToH[property], val.height());
}

/**
    \class QtRectPropertyManager

    \brief The QtRectPropertyManager provides and manages QRect properties.

    A rectangle property has nested \e x, \e y, \e width and \e height
    subproperties. The top-level property's value can be retrieved
    using the value() function, and set using the setValue() slot.

    The subproperties are created by a QtIntPropertyManager object. This
    manager can be retrieved using the subIntPropertyManager() function. In
    order to provide editing widgets for the subproperties in a
    property browser widget, this manager must be associated with an
    editor factory.

    A rectangle property also has a constraint rectangle which can be
    retrieved using the constraint() function, and set using the
    setConstraint() slot.

    In addition, QtRectPropertyManager provides the valueChanged() signal
    which is emitted whenever a property created by this manager
    changes, and the constraintChanged() signal which is emitted
    whenever such a property changes its constraint rectangle.

    \sa QtAbstractPropertyManager, QtIntPropertyManager, QtRectFPropertyManager
*/

/**
    \fn void QtRectPropertyManager::valueChanged(QtProperty *property, const QRect &value)

    This signal is emitted whenever a property created by this manager
    changes its value, passing a pointer to the \a property and the new
    \a value as parameters.

    \sa setValue()
*/

/**
    \fn void QtRectPropertyManager::constraintChanged(QtProperty *property, const QRect &constraint)

    This signal is emitted whenever property changes its constraint
    rectangle, passing a pointer to the \a property and the new \a
    constraint rectangle as parameters.

    \sa setConstraint()
*/

/**
    Creates a manager with the given \a parent.
*/
QtRectPropertyManager::QtRectPropertyManager(QObject *parent)
    : QtAbstractPropertyManager(parent)
{
    d_ptr = new QtRectPropertyManagerPrivate;
    d_ptr->q_ptr = this;

    d_ptr->m_intPropertyManager = new QtIntPropertyManager(this);
    connect(d_ptr->m_intPropertyManager, SIGNAL(valueChanged(QtProperty *, int)),
                this, SLOT(slotIntChanged(QtProperty *, int)));
    connect(d_ptr->m_intPropertyManager, SIGNAL(propertyDestroyed(QtProperty *)),
                this, SLOT(slotPropertyDestroyed(QtProperty *)));
}

/**
    Destroys this manager, and all the properties it has created.
*/
QtRectPropertyManager::~QtRectPropertyManager()
{
    clear();
    delete d_ptr;
}

/**
    Returns the manager that creates the nested \e x, \e y, \e width
    and \e height subproperties.

    In order to provide editing widgets for the mentioned
    subproperties in a property browser widget, this manager must be
    associated with an editor factory.

    \sa QtAbstractPropertyBrowser::setFactoryForManager()
*/
QtIntPropertyManager *QtRectPropertyManager::subIntPropertyManager() const
{
    return d_ptr->m_intPropertyManager;
}

/**
    Returns the given \a property's value.

    If the given \a property is not managed by this manager, this
    function returns an invalid rectangle.

    \sa setValue(), constraint()
*/
QRect QtRectPropertyManager::value(const QtProperty *property) const
{
    return getValue<QRect>(d_ptr->m_values, property);
}

/**
    Returns the given \a property's constraining rectangle. If returned value is null QRect it means there is no constraint applied.

    \sa value(), setConstraint()
*/
QRect QtRectPropertyManager::constraint(const QtProperty *property) const
{
    return getData<QRect>(d_ptr->m_values, &QtRectPropertyManagerPrivate::Data::constraint, property, QRect());
}

/**
    \reimp
*/
QString QtRectPropertyManager::valueText(const QtProperty *property) const
{
    const QtRectPropertyManagerPrivate::PropertyValueMap::const_iterator it = d_ptr->m_values.constFind(property);
    if (it == d_ptr->m_values.constEnd())
        return QString();
    const QRect v = it.value().val;
    return QString(tr("[(%1, %2), %3 x %4]").arg(QString::number(v.x()))
                                .arg(QString::number(v.y()))
                                .arg(QString::number(v.width()))
                                .arg(QString::number(v.height())));
}

/**
    \fn void QtRectPropertyManager::setValue(QtProperty *property, const QRect &value)

    Sets the value of the given \a property to \a value. Nested
    properties are updated automatically.

    If the specified \a value is not inside the given \a property's
    constraining rectangle, the value is adjusted accordingly to fit
    within the constraint.

    \sa value(), setConstraint(), valueChanged()
*/
void QtRectPropertyManager::setValue(QtProperty *property, const QRect &val)
{
    const QtRectPropertyManagerPrivate::PropertyValueMap::iterator it = d_ptr->m_values.find(property);
    if (it == d_ptr->m_values.end())
        return;

    QtRectPropertyManagerPrivate::Data data = it.value();

    QRect newRect = val.normalized();
    if (!data.constraint.isNull() && !data.constraint.contains(newRect)) {
        const QRect r1 = data.constraint;
        const QRect r2 = newRect;
        newRect.setLeft(qMax(r1.left(), r2.left()));
        newRect.setRight(qMin(r1.right(), r2.right()));
        newRect.setTop(qMax(r1.top(), r2.top()));
        newRect.setBottom(qMin(r1.bottom(), r2.bottom()));
        if (newRect.width() < 0 || newRect.height() < 0)
            return;
    }

    if (data.val == newRect)
        return;

    data.val = newRect;

    it.value() = data;
    d_ptr->m_intPropertyManager->setValue(d_ptr->m_propertyToX[property], newRect.x());
    d_ptr->m_intPropertyManager->setValue(d_ptr->m_propertyToY[property], newRect.y());
    d_ptr->m_intPropertyManager->setValue(d_ptr->m_propertyToW[property], newRect.width());
    d_ptr->m_intPropertyManager->setValue(d_ptr->m_propertyToH[property], newRect.height());

    emit propertyChanged(property);
    emit valueChanged(property, data.val);
}

/**
    Sets the given \a property's constraining rectangle to \a
    constraint.

    When setting the constraint, the current value is adjusted if
    necessary (ensuring that the current rectangle value is inside the
    constraint). In order to reset the constraint pass a null QRect value.

    \sa setValue(), constraint(), constraintChanged()
*/
void QtRectPropertyManager::setConstraint(QtProperty *property, const QRect &constraint)
{
    const QtRectPropertyManagerPrivate::PropertyValueMap::iterator it = d_ptr->m_values.find(property);
    if (it == d_ptr->m_values.end())
        return;

    QtRectPropertyManagerPrivate::Data data = it.value();

    QRect newConstraint = constraint.normalized();
    if (data.constraint == newConstraint)
        return;

    const QRect oldVal = data.val;

    data.constraint = newConstraint;

    if (!data.constraint.isNull() && !data.constraint.contains(oldVal)) {
        QRect r1 = data.constraint;
        QRect r2 = data.val;

        if (r2.width() > r1.width())
            r2.setWidth(r1.width());
        if (r2.height() > r1.height())
            r2.setHeight(r1.height());
        if (r2.left() < r1.left())
            r2.moveLeft(r1.left());
        else if (r2.right() > r1.right())
            r2.moveRight(r1.right());
        if (r2.top() < r1.top())
            r2.moveTop(r1.top());
        else if (r2.bottom() > r1.bottom())
            r2.moveBottom(r1.bottom());

        data.val = r2;
    }

    it.value() = data;

    emit constraintChanged(property, data.constraint);

    d_ptr->setConstraint(property, data.constraint, data.val);

    if (data.val == oldVal)
        return;

    emit propertyChanged(property);
    emit valueChanged(property, data.val);
}

/**
    \reimp
*/
void QtRectPropertyManager::initializeProperty(QtProperty *property)
{
    d_ptr->m_values[property] = QtRectPropertyManagerPrivate::Data();

    QtProperty *xProp = d_ptr->m_intPropertyManager->addProperty();
    xProp->setPropertyName(tr("X"));
    d_ptr->m_intPropertyManager->setValue(xProp, 0);
    d_ptr->m_propertyToX[property] = xProp;
    d_ptr->m_xToProperty[xProp] = property;
    property->addSubProperty(xProp);

    QtProperty *yProp = d_ptr->m_intPropertyManager->addProperty();
    yProp->setPropertyName(tr("Y"));
    d_ptr->m_intPropertyManager->setValue(yProp, 0);
    d_ptr->m_propertyToY[property] = yProp;
    d_ptr->m_yToProperty[yProp] = property;
    property->addSubProperty(yProp);

    QtProperty *wProp = d_ptr->m_intPropertyManager->addProperty();
    wProp->setPropertyName(tr("Width"));
    d_ptr->m_intPropertyManager->setValue(wProp, 0);
    d_ptr->m_intPropertyManager->setMinimum(wProp, 0);
    d_ptr->m_propertyToW[property] = wProp;
    d_ptr->m_wToProperty[wProp] = property;
    property->addSubProperty(wProp);

    QtProperty *hProp = d_ptr->m_intPropertyManager->addProperty();
    hProp->setPropertyName(tr("Height"));
    d_ptr->m_intPropertyManager->setValue(hProp, 0);
    d_ptr->m_intPropertyManager->setMinimum(hProp, 0);
    d_ptr->m_propertyToH[property] = hProp;
    d_ptr->m_hToProperty[hProp] = property;
    property->addSubProperty(hProp);
}

/**
    \reimp
*/
void QtRectPropertyManager::uninitializeProperty(QtProperty *property)
{
    QtProperty *xProp = d_ptr->m_propertyToX[property];
    if (xProp) {
        d_ptr->m_xToProperty.remove(xProp);
        delete xProp;
    }
    d_ptr->m_propertyToX.remove(property);

    QtProperty *yProp = d_ptr->m_propertyToY[property];
    if (yProp) {
        d_ptr->m_yToProperty.remove(yProp);
        delete yProp;
    }
    d_ptr->m_propertyToY.remove(property);

    QtProperty *wProp = d_ptr->m_propertyToW[property];
    if (wProp) {
        d_ptr->m_wToProperty.remove(wProp);
        delete wProp;
    }
    d_ptr->m_propertyToW.remove(property);

    QtProperty *hProp = d_ptr->m_propertyToH[property];
    if (hProp) {
        d_ptr->m_hToProperty.remove(hProp);
        delete hProp;
    }
    d_ptr->m_propertyToH.remove(property);

    d_ptr->m_values.remove(property);
}

// QtRectFPropertyManager

void QtRectFPropertyManagerPrivate::slotDoubleChanged(QtProperty *property, double value)
{
    if (QtProperty *prop = m_xToProperty.value(property, 0)) {
        QRectF r = m_values[prop].val;
        r.moveLeft(value);
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_yToProperty.value(property, 0)) {
        QRectF r = m_values[prop].val;
        r.moveTop(value);
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_wToProperty.value(property, 0)) {
        Data data = m_values[prop];
        QRectF r = data.val;
        r.setWidth(value);
        if (!data.constraint.isNull() && data.constraint.x() + data.constraint.width() < r.x() + r.width()) {
            r.moveLeft(data.constraint.left() + data.constraint.width() - r.width());
        }
        q_ptr->setValue(prop, r);
    } else if (QtProperty *prop = m_hToProperty.value(property, 0)) {
        Data data = m_values[prop];
        QRectF r = data.val;
        r.setHeight(value);
        if (!data.constraint.isNull() && data.constraint.y() + data.constraint.height() < r.y() + r.height()) {
            r.moveTop(data.constraint.top() + data.constraint.height() - r.height());
        }
        q_ptr->setValue(prop, r);
    }
}

void QtRectFPropertyManagerPrivate::slotPropertyDestroyed(QtProperty *property)
{
    if (QtProperty *pointProp = m_xToProperty.value(property, 0)) {
        m_propertyToX[pointProp] = 0;
        m_xToProperty.remove(property);
    } else if (QtProperty *pointProp = m_yToProperty.value(property, 0)) {
        m_propertyToY[pointProp] = 0;
        m_yToProperty.remove(property);
    } else if (QtProperty *pointProp = m_wToProperty.value(property, 0)) {
        m_propertyToW[pointProp] = 0;
        m_wToProperty.remove(property);
    } else if (QtProperty *pointProp = m_hToProperty.value(property, 0)) {
        m_propertyToH[pointProp] = 0;
        m_hToProperty.remove(property);
    }
}

void QtRectFPropertyManagerPrivate::setConstraint(QtProperty *property,
            const QRectF &constraint, const QRectF &val)
{
    const bool isNull = constraint.isNull();
    const qreal left   = isNull ? FLT_MIN : constraint.left();
    const qreal right  = isNull ? FLT_MAX : constraint.left() + constraint.width();
    const qreal top    = isNull ? FLT_MIN : constraint.top();
    const qreal bottom = isNull ? FLT_MAX : constraint.top() + constraint.height();
    const qreal width  = isNull ? FLT_MAX : constraint.width();
    const qreal height = isNull ? FLT_MAX : constraint.height();

    m_doublePropertyManager->setRange(m_propertyToX[property], left, right);
    m_doublePropertyManager->setRange(m_propertyToY[property], top, bottom);
    m_doublePropertyManager->setRange(m_propertyToW[property], 0, width);
    m_doublePropertyManager->setRange(m_propertyToH[property], 0, height);

    m_doublePropertyManager->setValue(m_propertyToX[property], val.x());
    m_doublePropertyManager->setValue(m_propertyToY[property], val.y());
    m_doublePropertyManager->setValue(m_propertyToW[property], val.width());
    m_doublePropertyManager->setValue(m_propertyToH[property], val.height());
}

/**
    \class QtRectFPropertyManager

    \brief The QtRectFPropertyManager provides and manages QRectF properties.

    A rectangle property has nested \e x, \e y, \e width and \e height
    subproperties. The top-level property's value can be retrieved
    using the value() function, and set using the setValue() slot.

    The subproperties are created by a QtDoublePropertyManager object. This
    manager can be retrieved using the subDoublePropertyManager() function. In
    order to provide editing widgets for the subproperties in a
    property browser widget, this manager must be associated with an
    editor factory.

    A rectangle property also has a constraint rectangle which can be
    retrieved using the constraint() function, and set using the
    setConstraint() slot.

    In addition, QtRectFPropertyManager provides the valueChanged() signal
    which is emitted whenever a property created by this manager
    changes, and the constraintChanged() signal which is emitted
    whenever such a property changes its constraint rectangle.

    \sa QtAbstractPropertyManager, QtDoublePropertyManager, QtRectPropertyManager
*/

/**
    \fn void QtRectFPropertyManager::valueChanged(QtProperty *property, const QRectF &value)

    This signal is emitted whenever a property created by this manager
    changes its value, passing a pointer to the \a property and the new
    \a value as parameters.

    \sa setValue()
*/

/**
    \fn void QtRectFPropertyManager::constraintChanged(QtProperty *property, const QRectF &constraint)

    This signal is emitted whenever property changes its constraint
    rectangle, passing a pointer to the \a property and the new \a
    constraint rectangle as parameters.

    \sa setConstraint()
*/

/**
    \fn void QtRectFPropertyManager::decimalsChanged(QtProperty *property, int prec)

    This signal is emitted whenever a property created by this manager
    changes its precision of value, passing a pointer to the
    \a property and the new \a prec value

    \sa setDecimals()
*/

/**
    Creates a manager with the given \a parent.
*/
QtRectFPropertyManager::QtRectFPropertyManager(QObject *parent)
    : QtAbstractPropertyManager(parent)
{
    d_ptr = new QtRectFPropertyManagerPrivate;
    d_ptr->q_ptr = this;

    d_ptr->m_doublePropertyManager = new QtDoublePropertyManager(this);
    connect(d_ptr->m_doublePropertyManager, SIGNAL(valueChanged(QtProperty *, double)),
                this, SLOT(slotDoubleChanged(QtProperty *, double)));
    connect(d_ptr->m_doublePropertyManager, SIGNAL(propertyDestroyed(QtProperty *)),
                this, SLOT(slotPropertyDestroyed(QtProperty *)));
}

/**
    Destroys this manager, and all the properties it has created.
*/
QtRectFPropertyManager::~QtRectFPropertyManager()
{
    clear();
    delete d_ptr;
}

/**
    Returns the manager that creates the nested \e x, \e y, \e width
    and \e height subproperties.

    In order to provide editing widgets for the mentioned
    subproperties in a property browser widget, this manager must be
    associated with an editor factory.

    \sa QtAbstractPropertyBrowser::setFactoryForManager()
*/
QtDoublePropertyManager *QtRectFPropertyManager::subDoublePropertyManager() const
{
    return d_ptr->m_doublePropertyManager;
}

/**
    Returns the given \a property's value.

    If the given \a property is not managed by this manager, this
    function returns an invalid rectangle.

    \sa setValue(), constraint()
*/
QRectF QtRectFPropertyManager::value(const QtProperty *property) const
{
    return getValue<QRectF>(d_ptr->m_values, property);
}

/**
    Returns the given \a property's precision, in decimals.

    \sa setDecimals()
*/
int QtRectFPropertyManager::decimals(const QtProperty *property) const
{
    return getData<int>(d_ptr->m_values, &QtRectFPropertyManagerPrivate::Data::decimals, property, 0);
}

/**
    Returns the given \a property's constraining rectangle. If returned value is null QRectF it means there is no constraint applied.

    \sa value(), setConstraint()
*/
QRectF QtRectFPropertyManager::constraint(const QtProperty *property) const
{
    return getData<QRectF>(d_ptr->m_values, &QtRectFPropertyManagerPrivate::Data::constraint, property, QRect());
}

/**
    \reimp
*/
QString QtRectFPropertyManager::valueText(const QtProperty *property) const
{
    const QtRectFPropertyManagerPrivate::PropertyValueMap::const_iterator it = d_ptr->m_values.constFind(property);
    if (it == d_ptr->m_values.constEnd())
        return QString();
    const QRectF v = it.value().val;
    const int dec = it.value().decimals;
    return QString(tr("[(%1, %2), %3 x %4]").arg(QString::number(v.x(), 'f', dec))
                                .arg(QString::number(v.y(), 'f', dec))
                                .arg(QString::number(v.width(), 'f', dec))
                                .arg(QString::number(v.height(), 'f', dec)));
}

/**
    \fn void QtRectFPropertyManager::setValue(QtProperty *property, const QRectF &value)

    Sets the value of the given \a property to \a value. Nested
    properties are updated automatically.

    If the specified \a value is not inside the given \a property's
    constraining rectangle, the value is adjusted accordingly to fit
    within the constraint.

    \sa value(), setConstraint(), valueChanged()
*/
void QtRectFPropertyManager::setValue(QtProperty *property, const QRectF &val)
{
    const QtRectFPropertyManagerPrivate::PropertyValueMap::iterator it = d_ptr->m_values.find(property);
    if (it == d_ptr->m_values.end())
        return;

    QtRectFPropertyManagerPrivate::Data data = it.value();

    QRectF newRect = val.normalized();
    if (!data.constraint.isNull() && !data.constraint.contains(newRect)) {
        const QRectF r1 = data.constraint;
        const QRectF r2 = newRect;
        newRect.setLeft(qMax(r1.left(), r2.left()));
        newRect.setRight(qMin(r1.right(), r2.right()));
        newRect.setTop(qMax(r1.top(), r2.top()));
        newRect.setBottom(qMin(r1.bottom(), r2.bottom()));
        if (newRect.width() < 0 || newRect.height() < 0)
            return;
    }

    if (data.val == newRect)
        return;

    data.val = newRect;

    it.value() = data;
    d_ptr->m_doublePropertyManager->setValue(d_ptr->m_propertyToX[property], newRect.x());
    d_ptr->m_doublePropertyManager->setValue(d_ptr->m_propertyToY[property], newRect.y());
    d_ptr->m_doublePropertyManager->setValue(d_ptr->m_propertyToW[property], newRect.width());
    d_ptr->m_doublePropertyManager->setValue(d_ptr->m_propertyToH[property], newRect.height());

    emit propertyChanged(property);
    emit valueChanged(property, data.val);
}

/**
    Sets the given \a property's constraining rectangle to \a
    constraint.

    When setting the constraint, the current value is adjusted if
    necessary (ensuring that the current rectangle value is inside the
    constraint). In order to reset the constraint pass a null QRectF value.

    \sa setValue(), constraint(), constraintChanged()
*/
void QtRectFPropertyManager::setConstraint(QtProperty *property, const QRectF &constraint)
{
    const QtRectFPropertyManagerPrivate::PropertyValueMap::iterator it = d_ptr->m_values.find(property);
    if (it == d_ptr->m_values.end())
        return;

    QtRectFPropertyManagerPrivate::Data data = it.value();

    QRectF newConstraint = constraint.normalized();
    if (data.constraint == newConstraint)
        return;

    const QRectF oldVal = data.val;

    data.constraint = newConstraint;

    if (!data.constraint.isNull() && !data.constraint.contains(oldVal)) {
        QRectF r1 = data.constraint;
        QRectF r2 = data.val;

        if (r2.width() > r1.width())
            r2.setWidth(r1.width());
        if (r2.height() > r1.height())
            r2.setHeight(r1.height());
        if (r2.left() < r1.left())
            r2.moveLeft(r1.left());
        else if (r2.right() > r1.right())
            r2.moveRight(r1.right());
        if (r2.top() < r1.top())
            r2.moveTop(r1.top());
        else if (r2.bottom() > r1.bottom())
            r2.moveBottom(r1.bottom());

        data.val = r2;
    }

    it.value() = data;

    emit constraintChanged(property, data.constraint);