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diff --git a/src/declarative/extra/qmlbehavior.cpp b/src/declarative/extra/qmlbehavior.cpp
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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 QtDeclarative 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/qobject_p.h>
+#include "qmlanimation.h"
+#include "qmltransition.h"
+#include "qmlbehavior.h"
+#include <QtDeclarative/qmlcontext.h>
+#include <QtCore/qparallelanimationgroup.h>
+
+QT_BEGIN_NAMESPACE
+
+QML_DEFINE_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,Behavior,QmlBehavior)
+
+class QmlBehaviorData : public QObject
+{
+Q_OBJECT
+public:
+    QmlBehaviorData(QObject *parent)
+        : QObject(parent) {}
+
+    Q_PROPERTY(QVariant endValue READ endValue NOTIFY valuesChanged)
+    Q_PROPERTY(QVariant startValue READ startValue NOTIFY valuesChanged)
+    QVariant endValue() const { return e; }
+    QVariant startValue() const { return s; }
+
+    QVariant e;
+    QVariant s;
+
+Q_SIGNALS:
+    void valuesChanged();
+
+private:
+    friend class QmlBehavior;
+};
+
+class QmlBehaviorPrivate : public QObjectPrivate
+{
+public:
+    QmlBehaviorPrivate() : operations(this) {}
+    QmlMetaProperty property;
+    QVariant currentValue;
+
+    QVariant fromValue;
+    QVariant toValue;
+    class AnimationList : public QmlConcreteList<QmlAbstractAnimation *>
+    {
+    public:
+        AnimationList(QmlBehaviorPrivate *parent) : _parent(parent) {}
+        virtual void append(QmlAbstractAnimation *a)
+        {
+            QmlConcreteList<QmlAbstractAnimation *>::append(a);
+            _parent->group->addAnimation(a->qtAnimation());
+            if (_parent->property.isValid()) {
+                a->setTarget(_parent->property);
+            }
+        }
+        virtual void clear() {  QmlConcreteList<QmlAbstractAnimation *>::clear(); } //###
+    private:
+        QmlBehaviorPrivate *_parent;
+    };
+    AnimationList operations;
+    QParallelAnimationGroup *group;
+};
+
+/*!
+    \qmlclass Behavior QmlBehavior
+    \brief The Behavior element allows you to specify a default animation for a property change.
+
+    In example below, the rect will use a bounce easing curve over 200 millisecond for any changes to its y property:
+    \code
+    Rectangle {
+        width: 20; height: 20
+        color: "#00ff00"
+        y: 200  //initial value
+        y: Behavior {
+            NumberAnimation {
+                easing: "easeOutBounce(amplitude:100)"
+                duration: 200
+            }
+        }
+    }
+    \endcode
+*/
+
+QmlBehavior::QmlBehavior(QObject *parent)
+: QmlPropertyValueSource(*(new QmlBehaviorPrivate), parent)
+{
+    Q_D(QmlBehavior);
+    d->group = new QParallelAnimationGroup;
+    QFx_setParent_noEvent(d->group, this);
+}
+
+/*!
+    \qmlproperty QVariant Behavior::from
+    This property holds a selector specifying a starting value for the behavior.
+
+    If you only want the behavior to apply when the change starts at a
+    specific value you can specify fromValue. This selector is used in conjunction
+    with the to selector.
+*/
+
+QVariant QmlBehavior::fromValue() const
+{
+    Q_D(const QmlBehavior);
+    return d->fromValue;
+}
+
+void QmlBehavior::setFromValue(const QVariant &v)
+{
+    Q_D(QmlBehavior);
+    d->fromValue = v;
+}
+
+/*!
+    \qmlproperty QVariant Behavior::to
+    This property holds a selector specifying a ending value for the behavior.
+
+    If you only want the behavior to apply when the change ends at a
+    specific value you can specify toValue. This selector is used in conjunction
+    with the from selector.
+*/
+
+QVariant QmlBehavior::toValue() const
+{
+    Q_D(const QmlBehavior);
+    return d->toValue;
+}
+
+void QmlBehavior::setToValue(const QVariant &v)
+{
+    Q_D(QmlBehavior);
+    d->toValue = v;
+}
+
+QmlList<QmlAbstractAnimation *>* QmlBehavior::operations()
+{
+    Q_D(QmlBehavior);
+    return &d->operations;
+}
+
+QmlBehavior::~QmlBehavior()
+{
+    //### do we need any other cleanup here?
+}
+
+bool QmlBehavior::_ignore = false;
+void QmlBehavior::propertyValueChanged()
+{
+    Q_D(QmlBehavior);
+    if (_ignore)
+        return;
+
+    QVariant newValue = d->property.read();
+
+    if ((!fromValue().isValid() || fromValue() == d->currentValue) &&
+       (!toValue().isValid() || toValue() == newValue)) {
+
+        //### does this clean up everything needed?
+        d->group->stop();
+
+        QmlStateOperation::ActionList actions;
+        Action action;
+        action.property = d->property;
+        action.fromValue = d->currentValue;
+        action.toValue = newValue;
+        actions << action;
+
+        _ignore = true;
+        d->property.write(d->currentValue);
+
+        QList<QmlMetaProperty> after;
+        for (int ii = 0; ii < d->operations.count(); ++ii) {
+            d->operations.at(ii)->transition(actions, after, QmlAbstractAnimation::Forward);
+        }
+        d->group->start();
+        if (!after.contains(d->property))
+            d->property.write(newValue);
+        _ignore = false;
+    }
+
+    d->currentValue = newValue;
+}
+
+void QmlBehavior::setTarget(const QmlMetaProperty &property)
+{
+    Q_D(QmlBehavior);
+    d->property = property;
+    d->currentValue = property.read();
+    d->property.connectNotifier(this, SLOT(propertyValueChanged()));
+    for (int ii = 0; ii < d->operations.count(); ++ii) {
+        d->operations.at(ii)->setTarget(property);
+    }
+}
+
+QT_END_NAMESPACE
+
+#include "qmlbehavior.moc"