qquickitemanimation.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquickitemanimation_p.h"
#include "qquickitemanimation_p_p.h"
#include "qquickstateoperations_p.h"
 
#include <private/qqmlproperty_p.h>
#if QT_CONFIG(quick_path)
#include <private/qquickpath_p.h>
#endif
#include "private/qparallelanimationgroupjob_p.h"
#include "private/qsequentialanimationgroupjob_p.h"
 
#include <QtCore/qmath.h>
#include <QtGui/qtransform.h>
#include <QtQml/qqmlinfo.h>
 
QT_BEGIN_NAMESPACE
 
QQuickParentAnimation::QQuickParentAnimation(QObject *parent)
    : QQuickAnimationGroup(*(new QQuickParentAnimationPrivate), parent)
{
}
 
QQuickItem *QQuickParentAnimation::target() const
{
    Q_D(const QQuickParentAnimation);
    return d->target;
}
 
void QQuickParentAnimation::setTargetObject(QQuickItem *target)
{
    Q_D(QQuickParentAnimation);
    if (target == d->target)
        return;
 
    d->target = target;
    emit targetChanged();
}
 
QQuickItem *QQuickParentAnimation::newParent() const
{
    Q_D(const QQuickParentAnimation);
    return d->newParent;
}
 
void QQuickParentAnimation::setNewParent(QQuickItem *newParent)
{
    Q_D(QQuickParentAnimation);
    if (newParent == d->newParent)
        return;
 
    d->newParent = newParent;
    emit newParentChanged();
}
 
QQuickItem *QQuickParentAnimation::via() const
{
    Q_D(const QQuickParentAnimation);
    return d->via;
}
 
void QQuickParentAnimation::setVia(QQuickItem *via)
{
    Q_D(QQuickParentAnimation);
    if (via == d->via)
        return;
 
    d->via = via;
    emit viaChanged();
}
 
//### mirrors same-named function in QQuickItem
QPointF QQuickParentAnimationPrivate::computeTransformOrigin(QQuickItem::TransformOrigin origin, qreal width, qreal height) const
{
    switch (origin) {
    default:
    case QQuickItem::TopLeft:
        return QPointF(0, 0);
    case QQuickItem::Top:
        return QPointF(width / 2., 0);
    case QQuickItem::TopRight:
        return QPointF(width, 0);
    case QQuickItem::Left:
        return QPointF(0, height / 2.);
    case QQuickItem::Center:
        return QPointF(width / 2., height / 2.);
    case QQuickItem::Right:
        return QPointF(width, height / 2.);
    case QQuickItem::BottomLeft:
        return QPointF(0, height);
    case QQuickItem::Bottom:
        return QPointF(width / 2., height);
    case QQuickItem::BottomRight:
        return QPointF(width, height);
    }
}
 
struct QQuickParentAnimationData : public QAbstractAnimationAction
{
    QQuickParentAnimationData() : reverse(false) {}
    ~QQuickParentAnimationData() { qDeleteAll(pc); }
 
    QQuickStateActions actions;
    //### reverse should probably apply on a per-action basis
    bool reverse;
    QList<QQuickParentChange *> pc;
    void doAction() override
    {
        for (int ii = 0; ii < actions.size(); ++ii) {
            const QQuickStateAction &action = actions.at(ii);
            if (reverse)
                action.event->reverse();
            else
                action.event->execute();
        }
    }
};
 
QAbstractAnimationJob* QQuickParentAnimation::transition(QQuickStateActions &actions,
                        QQmlProperties &modified,
                        TransitionDirection direction,
                        QObject *defaultTarget)
{
    Q_D(QQuickParentAnimation);
 
    std::unique_ptr<QQuickParentAnimationData> data(new QQuickParentAnimationData);
    std::unique_ptr<QQuickParentAnimationData> viaData(new QQuickParentAnimationData);
 
    bool hasExplicit = false;
    if (d->target && d->newParent) {
        data->reverse = false;
        QQuickStateAction myAction;
        QQuickParentChange *pc = new QQuickParentChange;
        pc->setObject(d->target);
        pc->setParent(d->newParent);
        myAction.event = pc;
        data->pc << pc;
        data->actions << myAction;
        hasExplicit = true;
        if (d->via) {
            viaData->reverse = false;
            QQuickStateAction myVAction;
            QQuickParentChange *vpc = new QQuickParentChange;
            vpc->setObject(d->target);
            vpc->setParent(d->via);
            myVAction.event = vpc;
            viaData->pc << vpc;
            viaData->actions << myVAction;
        }
        //### once actions have concept of modified,
        //    loop to match appropriate ParentChanges and mark as modified
    }
 
    if (!hasExplicit)
    for (int i = 0; i < actions.size(); ++i) {
        QQuickStateAction &action = actions[i];
        if (action.event && action.event->type() == QQuickStateActionEvent::ParentChange
            && (!d->target || static_cast<QQuickParentChange*>(action.event)->object() == d->target)) {
 
            QQuickParentChange *pc = static_cast<QQuickParentChange*>(action.event);
            QQuickStateAction myAction = action;
            data->reverse = action.reverseEvent;
 
            //### this logic differs from PropertyAnimation
            //    (probably a result of modified vs. done)
            if (d->newParent) {
                QQuickParentChange *epc = new QQuickParentChange;
                epc->setObject(static_cast<QQuickParentChange*>(action.event)->object());
                epc->setParent(d->newParent);
                myAction.event = epc;
                data->pc << epc;
                data->actions << myAction;
                pc = epc;
            } else {
                action.actionDone = true;
                data->actions << myAction;
            }
 
            if (d->via) {
                viaData->reverse = false;
                QQuickStateAction myAction;
                QQuickParentChange *vpc = new QQuickParentChange;
                vpc->setObject(pc->object());
                vpc->setParent(d->via);
                myAction.event = vpc;
                viaData->pc << vpc;
                viaData->actions << myAction;
                QQuickStateAction dummyAction;
                QQuickStateAction &xAction = pc->xIsSet() && i < actions.size()-1 ? actions[++i] : dummyAction;
                QQuickStateAction &yAction = pc->yIsSet() && i < actions.size()-1 ? actions[++i] : dummyAction;
                QQuickStateAction &sAction = pc->scaleIsSet() && i < actions.size()-1 ? actions[++i] : dummyAction;
                QQuickStateAction &rAction = pc->rotationIsSet() && i < actions.size()-1 ? actions[++i] : dummyAction;
                QQuickItem *target = pc->object();
                QQuickItem *targetParent = action.reverseEvent ? pc->originalParent() : pc->parent();
 
                //### this mirrors the logic in QQuickParentChange.
                bool ok;
                const QTransform &transform = targetParent->itemTransform(d->via, &ok);
                if (transform.type() >= QTransform::TxShear || !ok) {
                    qmlWarning(this) << QQuickParentAnimation::tr("Unable to preserve appearance under complex transform");
                    ok = false;
                }
 
                qreal scale = 1;
                qreal rotation = 0;
                bool isRotate = (transform.type() == QTransform::TxRotate) || (transform.m11() < 0);
                if (ok && !isRotate) {
                    if (transform.m11() == transform.m22())
                        scale = transform.m11();
                    else {
                        qmlWarning(this) << QQuickParentAnimation::tr("Unable to preserve appearance under non-uniform scale");
                        ok = false;
                    }
                } else if (ok && isRotate) {
                    if (transform.m11() == transform.m22())
                        scale = qSqrt(transform.m11()*transform.m11() + transform.m12()*transform.m12());
                    else {
                        qmlWarning(this) << QQuickParentAnimation::tr("Unable to preserve appearance under non-uniform scale");
                        ok = false;
                    }
 
                    if (scale != 0)
                        rotation = qRadiansToDegrees(qAtan2(transform.m12() / scale, transform.m11() / scale));
                    else {
                        qmlWarning(this) << QQuickParentAnimation::tr("Unable to preserve appearance under scale of 0");
                        ok = false;
                    }
                }
 
                const QPointF &point = transform.map(QPointF(xAction.toValue.toReal(),yAction.toValue.toReal()));
                qreal x = point.x();
                qreal y = point.y();
                if (ok && target->transformOrigin() != QQuickItem::TopLeft) {
                    qreal w = target->width();
                    qreal h = target->height();
                    if (pc->widthIsSet() && i < actions.size() - 1)
                        w = actions.at(++i).toValue.toReal();
                    if (pc->heightIsSet() && i < actions.size() - 1)
                        h = actions.at(++i).toValue.toReal();
                    const QPointF &transformOrigin
                            = d->computeTransformOrigin(target->transformOrigin(), w,h);
                    qreal tempxt = transformOrigin.x();
                    qreal tempyt = transformOrigin.y();
                    QTransform t;
                    t.translate(-tempxt, -tempyt);
                    t.rotate(rotation);
                    t.scale(scale, scale);
                    t.translate(tempxt, tempyt);
                    const QPointF &offset = t.map(QPointF(0,0));
                    x += offset.x();
                    y += offset.y();
                }
 
                if (ok) {
                    //qDebug() << x << y << rotation << scale;
                    xAction.toValue = x;
                    yAction.toValue = y;
                    sAction.toValue = sAction.toValue.toReal() * scale;
                    rAction.toValue = rAction.toValue.toReal() + rotation;
                }
            }
        }
    }
 
    if (data->actions.size()) {
        QSequentialAnimationGroupJob *topLevelGroup = new QSequentialAnimationGroupJob;
        QActionAnimation *viaAction = d->via ? new QActionAnimation : nullptr;
        QActionAnimation *targetAction = new QActionAnimation;
        //we'll assume the common case by far is to have children, and always create ag
        QParallelAnimationGroupJob *ag = new QParallelAnimationGroupJob;
 
        if (d->via)
            viaAction->setAnimAction(viaData.release());
        targetAction->setAnimAction(data.release());
 
        //take care of any child animations
        bool valid = d->defaultProperty.isValid();
        QAbstractAnimationJob* anim;
        for (int ii = 0; ii < d->animations.size(); ++ii) {
            if (valid)
                d->animations.at(ii)->setDefaultTarget(d->defaultProperty);
            anim = d->animations.at(ii)->transition(actions, modified, direction, defaultTarget);
            if (anim)
                ag->appendAnimation(anim);
        }
 
        //TODO: simplify/clarify logic
        bool forwards = direction == QQuickAbstractAnimation::Forward;
        if (forwards) {
            topLevelGroup->appendAnimation(d->via ? viaAction : targetAction);
            topLevelGroup->appendAnimation(ag);
            if (d->via)
                topLevelGroup->appendAnimation(targetAction);
        } else {
            if (d->via)
                topLevelGroup->appendAnimation(targetAction);
            topLevelGroup->appendAnimation(ag);
            topLevelGroup->appendAnimation(d->via ? viaAction : targetAction);
        }
        return initInstance(topLevelGroup);
    }
    return nullptr;
}
 
QQuickAnchorAnimation::QQuickAnchorAnimation(QObject *parent)
: QQuickAbstractAnimation(*(new QQuickAnchorAnimationPrivate), parent)
{
}
 
QQmlListProperty<QQuickItem> QQuickAnchorAnimation::targets()
{
    Q_D(QQuickAnchorAnimation);
    return QQmlListProperty<QQuickItem>(this, &(d->targets));
}
 
int QQuickAnchorAnimation::duration() const
{
    Q_D(const QQuickAnchorAnimation);
    return d->duration;
}
 
void QQuickAnchorAnimation::setDuration(int duration)
{
    if (duration < 0) {
        qmlWarning(this) << tr("Cannot set a duration of < 0");
        return;
    }
 
    Q_D(QQuickAnchorAnimation);
    if (d->duration == duration)
        return;
    d->duration = duration;
    emit durationChanged(duration);
}
 
QEasingCurve QQuickAnchorAnimation::easing() const
{
    Q_D(const QQuickAnchorAnimation);
    return d->easing;
}
 
void QQuickAnchorAnimation::setEasing(const QEasingCurve &e)
{
    Q_D(QQuickAnchorAnimation);
    if (d->easing == e)
        return;
 
    d->easing = e;
    emit easingChanged(e);
}
 
QAbstractAnimationJob* QQuickAnchorAnimation::transition(QQuickStateActions &actions,
                        QQmlProperties &modified,
                        TransitionDirection direction,
                        QObject *defaultTarget)
{
    Q_UNUSED(modified);
    Q_UNUSED(defaultTarget);
    Q_D(QQuickAnchorAnimation);
    QQuickAnimationPropertyUpdater *data = new QQuickAnimationPropertyUpdater;
    data->interpolatorType = QMetaType::QReal;
    data->interpolator = d->interpolator;
    data->reverse = direction == Backward ? true : false;
    data->fromIsSourced = false;
    data->fromIsDefined = false;
 
    for (int ii = 0; ii < actions.size(); ++ii) {
        QQuickStateAction &action = actions[ii];
        if (action.event && action.event->type() == QQuickStateActionEvent::AnchorChanges
            && (d->targets.isEmpty() || d->targets.contains(static_cast<QQuickAnchorChanges*>(action.event)->object()))) {
            data->actions << static_cast<QQuickAnchorChanges*>(action.event)->additionalActions();
        }
    }
 
    QQuickBulkValueAnimator *animator = new QQuickBulkValueAnimator;
    if (data->actions.size()) {
        animator->setAnimValue(data);
        animator->setFromIsSourcedValue(&data->fromIsSourced);
    } else {
        delete data;
    }
 
    animator->setDuration(d->duration);
    animator->setEasingCurve(d->easing);
    return initInstance(animator);
}
 
 
#if QT_CONFIG(quick_path)
QQuickPathAnimation::QQuickPathAnimation(QObject *parent)
: QQuickAbstractAnimation(*(new QQuickPathAnimationPrivate), parent)
{
}
 
QQuickPathAnimation::~QQuickPathAnimation()
{
    typedef QHash<QQuickItem*, QQuickPathAnimationAnimator* >::iterator ActiveAnimationsIt;
 
    Q_D(QQuickPathAnimation);
    for (ActiveAnimationsIt it = d->activeAnimations.begin(), end = d->activeAnimations.end(); it != end; ++it)
        it.value()->clearTemplate();
}
 
int QQuickPathAnimation::duration() const
{
    Q_D(const QQuickPathAnimation);
    return d->duration;
}
 
void QQuickPathAnimation::setDuration(int duration)
{
    if (duration < 0) {
        qmlWarning(this) << tr("Cannot set a duration of < 0");
        return;
    }
 
    Q_D(QQuickPathAnimation);
    if (d->duration == duration)
        return;
    d->duration = duration;
    emit durationChanged(duration);
}
 
QEasingCurve QQuickPathAnimation::easing() const
{
    Q_D(const QQuickPathAnimation);
    return d->easingCurve;
}
 
void QQuickPathAnimation::setEasing(const QEasingCurve &e)
{
    Q_D(QQuickPathAnimation);
    if (d->easingCurve == e)
        return;
 
    d->easingCurve = e;
    emit easingChanged(e);
}
 
QQuickPath *QQuickPathAnimation::path() const
{
    Q_D(const QQuickPathAnimation);
    return d->path;
}
 
void QQuickPathAnimation::setPath(QQuickPath *path)
{
    Q_D(QQuickPathAnimation);
    if (d->path == path)
        return;
 
    d->path = path;
    emit pathChanged();
}
 
QQuickItem *QQuickPathAnimation::target() const
{
    Q_D(const QQuickPathAnimation);
    return d->target;
}
 
void QQuickPathAnimation::setTargetObject(QQuickItem *target)
{
    Q_D(QQuickPathAnimation);
    if (d->target == target)
        return;
 
    d->target = target;
    emit targetChanged();
}
 
QQuickPathAnimation::Orientation QQuickPathAnimation::orientation() const
{
    Q_D(const QQuickPathAnimation);
    return d->orientation;
}
 
void QQuickPathAnimation::setOrientation(Orientation orientation)
{
    Q_D(QQuickPathAnimation);
    if (d->orientation == orientation)
        return;
 
    d->orientation = orientation;
    emit orientationChanged(d->orientation);
}
 
QPointF QQuickPathAnimation::anchorPoint() const
{
    Q_D(const QQuickPathAnimation);
    return d->anchorPoint;
}
 
void QQuickPathAnimation::setAnchorPoint(const QPointF &point)
{
    Q_D(QQuickPathAnimation);
    if (d->anchorPoint == point)
        return;
 
    d->anchorPoint = point;
    emit anchorPointChanged(point);
}
 
int QQuickPathAnimation::orientationEntryDuration() const
{
    Q_D(const QQuickPathAnimation);
    return d->entryDuration;
}
 
void QQuickPathAnimation::setOrientationEntryDuration(int duration)
{
    Q_D(QQuickPathAnimation);
    if (d->entryDuration == duration)
        return;
    d->entryDuration = duration;
    emit orientationEntryDurationChanged(duration);
}
 
int QQuickPathAnimation::orientationExitDuration() const
{
    Q_D(const QQuickPathAnimation);
    return d->exitDuration;
}
 
void QQuickPathAnimation::setOrientationExitDuration(int duration)
{
    Q_D(QQuickPathAnimation);
    if (d->exitDuration == duration)
        return;
    d->exitDuration = duration;
    emit orientationExitDurationChanged(duration);
}
 
qreal QQuickPathAnimation::endRotation() const
{
    Q_D(const QQuickPathAnimation);
    return d->endRotation.isNull ? qreal(0) : d->endRotation.value;
}
 
void QQuickPathAnimation::setEndRotation(qreal rotation)
{
    Q_D(QQuickPathAnimation);
    if (!d->endRotation.isNull && d->endRotation == rotation)
        return;
 
    d->endRotation = rotation;
    emit endRotationChanged(d->endRotation);
}
 
QAbstractAnimationJob* QQuickPathAnimation::transition(QQuickStateActions &actions,
                                           QQmlProperties &modified,
                                           TransitionDirection direction,
                                           QObject *defaultTarget)
{
    Q_D(QQuickPathAnimation);
 
    QQuickItem *target = d->target ? d->target : qobject_cast<QQuickItem*>(defaultTarget);
 
    QQuickPathAnimationUpdater prevData;
    bool havePrevData = false;
    if (d->activeAnimations.contains(target)) {
        havePrevData = true;
        prevData = *d->activeAnimations[target]->pathUpdater();
    }
 
    for (auto it = d->activeAnimations.begin(); it != d->activeAnimations.end();) {
        QQuickPathAnimationAnimator *anim = it.value();
        if (anim->state() == QAbstractAnimationJob::Stopped) {
            anim->clearTemplate();
            it = d->activeAnimations.erase(it);
        } else {
            ++it;
        }
    }
 
    QQuickPathAnimationUpdater *data = new QQuickPathAnimationUpdater();
    QQuickPathAnimationAnimator *pa = new QQuickPathAnimationAnimator(d);
 
    d->activeAnimations[target] = pa;
 
    data->orientation = d->orientation;
    data->anchorPoint = d->anchorPoint;
    data->entryInterval = d->duration ? qreal(d->entryDuration) / d->duration : qreal(0);
    data->exitInterval = d->duration ? qreal(d->exitDuration) / d->duration : qreal(0);
    data->endRotation = d->endRotation;
    data->reverse = direction == Backward ? true : false;
    data->fromIsSourced = false;
    data->fromIsDefined = (d->path && d->path->hasStartX() && d->path->hasStartY()) ? true : false;
    data->toIsDefined = d->path ? true : false;
    int origModifiedSize = modified.size();
 
    for (int i = 0; i < actions.size(); ++i) {
        QQuickStateAction &action = actions[i];
        if (action.event)
            continue;
        if (action.specifiedObject == target && action.property.name() == QLatin1String("x")) {
            data->toX = action.toValue.toReal();
            modified << action.property;
            action.fromValue = action.toValue;
        }
        if (action.specifiedObject == target && action.property.name() == QLatin1String("y")) {
            data->toY = action.toValue.toReal();
            modified << action.property;
            action.fromValue = action.toValue;
        }
    }
 
    if (target && d->path && (modified.size() > origModifiedSize || data->toIsDefined)) {
        data->target = target;
        data->path = d->path;
        data->path->invalidateSequentialHistory();
 
        if (havePrevData) {
            // get the original start angle that was used (so we can exactly reverse).
            data->startRotation = prevData.startRotation;
 
            // treat interruptions specially, otherwise we end up with strange paths
            if ((data->reverse || prevData.reverse) && prevData.currentV > 0 && prevData.currentV < 1) {
                if (!data->fromIsDefined && !data->toIsDefined && !prevData.painterPath.isEmpty()) {
                    QPointF pathPos = QQuickPath::sequentialPointAt(prevData.painterPath, prevData.pathLength, prevData.attributePoints, prevData.prevBez, prevData.currentV);
                    if (!prevData.anchorPoint.isNull())
                        pathPos -= prevData.anchorPoint;
                    if (pathPos == data->target->position()) {   //only treat as interruption if we interrupted ourself
                        data->painterPath = prevData.painterPath;
                        data->toIsDefined = data->fromIsDefined = data->fromIsSourced = true;
                        data->prevBez.isValid = false;
                        data->interruptStart = prevData.currentV;
                        data->startRotation = prevData.startRotation;
                        data->pathLength = prevData.pathLength;
                        data->attributePoints = prevData.attributePoints;
                    }
                }
            }
        }
        pa->setFromIsSourcedValue(&data->fromIsSourced);
        pa->setAnimValue(data);
        pa->setDuration(d->duration);
        pa->setEasingCurve(d->easingCurve);
        return initInstance(pa);
    } else {
        pa->setFromIsSourcedValue(nullptr);
        pa->setAnimValue(nullptr);
        delete pa;
        delete data;
    }
    return nullptr;
}
 
void QQuickPathAnimationUpdater::setValue(qreal v)
{
    v = qMin(qMax(v, (qreal)0.0), (qreal)1.0);;
 
    if (interruptStart.isValid()) {
        if (reverse)
            v = 1 - v;
        qreal end = reverse ? 0.0 : 1.0;
        v = interruptStart + v * (end-interruptStart);
    }
    currentV = v;
    bool atStart = ((reverse && v == 1.0) || (!reverse && v == 0.0));
    if (!fromIsSourced && (!fromIsDefined || !toIsDefined)) {
        qreal startX = reverse ? toX + anchorPoint.x() : target->x() + anchorPoint.x();
        qreal startY = reverse ? toY + anchorPoint.y() : target->y() + anchorPoint.y();
        qreal endX = reverse ? target->x() + anchorPoint.x() : toX + anchorPoint.x();
        qreal endY = reverse ? target->y() + anchorPoint.y() : toY + anchorPoint.y();
 
        prevBez.isValid = false;
        painterPath = path->createPath(QPointF(startX, startY), QPointF(endX, endY), QStringList(), pathLength, attributePoints);
        fromIsSourced = true;
    }
 
    qreal angle;
    bool fixed = orientation == QQuickPathAnimation::Fixed;
    QPointF currentPos = !painterPath.isEmpty() ? path->sequentialPointAt(painterPath, pathLength, attributePoints, prevBez, v, fixed ? nullptr : &angle) : path->sequentialPointAt(v, fixed ? nullptr : &angle);
 
    //adjust position according to anchor point
    if (!anchorPoint.isNull()) {
        currentPos -= anchorPoint;
        if (atStart) {
            if (!anchorPoint.isNull() && !fixed)
                target->setTransformOriginPoint(anchorPoint);
        }
    }
 
    target->setPosition(currentPos);
 
    //adjust angle according to orientation
    if (!fixed) {
        switch (orientation) {
            case QQuickPathAnimation::RightFirst:
                angle = -angle;
                break;
            case QQuickPathAnimation::TopFirst:
                angle = -angle + 90;
                break;
            case QQuickPathAnimation::LeftFirst:
                angle = -angle + 180;
                break;
            case QQuickPathAnimation::BottomFirst:
                angle = -angle + 270;
                break;
            default:
                angle = 0;
                break;
        }
 
        if (atStart && !reverse) {
            startRotation = target->rotation();
 
            //shortest distance to correct orientation
            qreal diff = angle - startRotation;
            while (diff > 180.0) {
                startRotation.value += 360.0;
                diff -= 360.0;
            }
            while (diff < -180.0) {
                startRotation.value -= 360.0;
                diff += 360.0;
            }
        }
 
        //smoothly transition to the desired orientation
        //TODO: shortest distance calculations
        if (startRotation.isValid()) {
            if (reverse && v == 0.0)
                angle = startRotation;
            else if (v < entryInterval)
                angle = angle * v / entryInterval + startRotation * (entryInterval - v) / entryInterval;
        }
        if (endRotation.isValid()) {
            qreal exitStart = 1 - entryInterval;
            if (!reverse && v == 1.0)
                angle = endRotation;
            else if (v > exitStart)
                angle = endRotation * (v - exitStart) / exitInterval + angle * (exitInterval - (v - exitStart)) / exitInterval;
        }
        target->setRotation(angle);
    }
 
    /*
        NOTE: we don't always reset the transform origin, as it can cause a
        visual jump if ending on an angle. This means that in some cases
        (anchor point and orientation both specified, and ending at an angle)
        the transform origin will always be set after running the path animation.
     */
    if ((reverse && v == 0.0) || (!reverse && v == 1.0)) {
        if (!anchorPoint.isNull() && !fixed && qFuzzyIsNull(angle))
            target->setTransformOriginPoint(QPointF());
    }
}
 
QQuickPathAnimationAnimator::QQuickPathAnimationAnimator(QQuickPathAnimationPrivate *priv)
    : animationTemplate(priv)
{
}
 
QQuickPathAnimationAnimator::~QQuickPathAnimationAnimator()
{
    if (animationTemplate && pathUpdater()) {
        QHash<QQuickItem*, QQuickPathAnimationAnimator* >::iterator it =
                animationTemplate->activeAnimations.find(pathUpdater()->target);
        if (it != animationTemplate->activeAnimations.end() && it.value() == this)
            animationTemplate->activeAnimations.erase(it);
    }
}
 
#endif // quick_path
 
QT_END_NAMESPACE
 
#include "moc_qquickitemanimation_p.cpp"