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diff --git a/src/declarative/util/qdeclarativebehavior.cpp b/src/declarative/util/qdeclarativebehavior.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "private/qdeclarativebehavior_p.h"
+
+#include "private/qdeclarativeanimation_p.h"
+#include "private/qdeclarativetransition_p.h"
+
+#include <qdeclarativecontext.h>
+#include <qdeclarativeinfo.h>
+#include <qdeclarativeproperty_p.h>
+#include <qdeclarativeguard_p.h>
+#include <qdeclarativeengine_p.h>
+
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeBehaviorPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QDeclarativeBehavior)
+public:
+    QDeclarativeBehaviorPrivate() : animation(0), enabled(true), finalized(false)
+      , blockRunningChanged(false) {}
+
+    QDeclarativeProperty property;
+    QVariant currentValue;
+    QVariant targetValue;
+    QDeclarativeGuard<QDeclarativeAbstractAnimation> animation;
+    bool enabled;
+    bool finalized;
+    bool blockRunningChanged;
+};
+
+/*!
+    \qmlclass Behavior QDeclarativeBehavior
+    \ingroup qml-animation-transition
+    \since 4.7
+    \brief The Behavior element allows you to specify a default animation for a property change.
+
+    A Behavior defines the default animation to be applied whenever a
+    particular property value changes.
+
+    For example, the following Behavior defines a NumberAnimation to be run
+    whenever the \l Rectangle's \c width value changes. When the MouseArea
+    is clicked, the \c width is changed, triggering the behavior's animation:
+
+    \snippet doc/src/snippets/declarative/behavior.qml 0
+
+    Note that a property cannot have more than one assigned Behavior. To provide
+    multiple animations within a Behavior, use ParallelAnimation or
+    SequentialAnimation.
+
+    If a \l{QML States}{state change} has a \l Transition that matches the same property as a
+    Behavior, the \l Transition animation overrides the Behavior for that
+    state change. For general advice on using Behaviors to animate state changes, see
+    \l{Using QML Behaviors with States}.
+
+    \sa {QML Animation and Transitions}, {declarative/animation/behaviors}{Behavior example}, QtDeclarative
+*/
+
+
+QDeclarativeBehavior::QDeclarativeBehavior(QObject *parent)
+    : QObject(*(new QDeclarativeBehaviorPrivate), parent)
+{
+}
+
+QDeclarativeBehavior::~QDeclarativeBehavior()
+{
+}
+
+/*!
+    \qmlproperty Animation Behavior::animation
+    \default
+
+    This property holds the animation to run when the behavior is triggered.
+*/
+
+QDeclarativeAbstractAnimation *QDeclarativeBehavior::animation()
+{
+    Q_D(QDeclarativeBehavior);
+    return d->animation;
+}
+
+void QDeclarativeBehavior::setAnimation(QDeclarativeAbstractAnimation *animation)
+{
+    Q_D(QDeclarativeBehavior);
+    if (d->animation) {
+        qmlInfo(this) << tr("Cannot change the animation assigned to a Behavior.");
+        return;
+    }
+
+    d->animation = animation;
+    if (d->animation) {
+        d->animation->setDefaultTarget(d->property);
+        d->animation->setDisableUserControl();
+        connect(d->animation->qtAnimation(),
+                SIGNAL(stateChanged(QAbstractAnimation::State,QAbstractAnimation::State)),
+                this,
+                SLOT(qtAnimationStateChanged(QAbstractAnimation::State,QAbstractAnimation::State)));
+    }
+}
+
+
+void QDeclarativeBehavior::qtAnimationStateChanged(QAbstractAnimation::State newState,QAbstractAnimation::State)
+{
+    Q_D(QDeclarativeBehavior);
+    if (!d->blockRunningChanged)
+        d->animation->notifyRunningChanged(newState == QAbstractAnimation::Running);
+}
+
+
+/*!
+    \qmlproperty bool Behavior::enabled
+
+    This property holds whether the behavior will be triggered when the tracked
+    property changes value.
+
+    By default a Behavior is enabled.
+*/
+
+bool QDeclarativeBehavior::enabled() const
+{
+    Q_D(const QDeclarativeBehavior);
+    return d->enabled;
+}
+
+void QDeclarativeBehavior::setEnabled(bool enabled)
+{
+    Q_D(QDeclarativeBehavior);
+    if (d->enabled == enabled)
+        return;
+    d->enabled = enabled;
+    emit enabledChanged();
+}
+
+void QDeclarativeBehavior::write(const QVariant &value)
+{
+    Q_D(QDeclarativeBehavior);
+    qmlExecuteDeferred(this);
+    if (!d->animation || !d->enabled || !d->finalized) {
+        QDeclarativePropertyPrivate::write(d->property, value, QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding);
+        d->targetValue = value;
+        return;
+    }
+
+    if (d->animation->isRunning() && value == d->targetValue)
+        return;
+
+    d->currentValue = d->property.read();
+    d->targetValue = value;
+
+    if (d->animation->qtAnimation()->duration() != -1
+            && d->animation->qtAnimation()->state() != QAbstractAnimation::Stopped) {
+        d->blockRunningChanged = true;
+        d->animation->qtAnimation()->stop();
+    }
+
+    QDeclarativeStateOperation::ActionList actions;
+    QDeclarativeAction action;
+    action.property = d->property;
+    action.fromValue = d->currentValue;
+    action.toValue = value;
+    actions << action;
+
+    QList<QDeclarativeProperty> after;
+    d->animation->transition(actions, after, QDeclarativeAbstractAnimation::Forward);
+    d->animation->qtAnimation()->start();
+    d->blockRunningChanged = false;
+    if (!after.contains(d->property))
+        QDeclarativePropertyPrivate::write(d->property, value, QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding);
+}
+
+void QDeclarativeBehavior::setTarget(const QDeclarativeProperty &property)
+{
+    Q_D(QDeclarativeBehavior);
+    d->property = property;
+    d->currentValue = property.read();
+    if (d->animation)
+        d->animation->setDefaultTarget(property);
+
+    QDeclarativeEnginePrivate *engPriv = QDeclarativeEnginePrivate::get(qmlEngine(this));
+    engPriv->registerFinalizedParserStatusObject(this, this->metaObject()->indexOfSlot("componentFinalized()"));
+}
+
+void QDeclarativeBehavior::componentFinalized()
+{
+    Q_D(QDeclarativeBehavior);
+    d->finalized = true;
+}
+
+QT_END_NAMESPACE