Remove QQuickPointerEvent etc.; deliver QPointerEvents directly

QEventPoint does not have an accessor to get the QPointerEvent that it
came from, because that's inconsistent with the idea that QPointerEvent
instances are temporary, stack-allocated and movable (the pointer would
often be wrong or null, therefore could not be relied upon).
So most functions that worked directly with QQuickEventPoint before
(which fortunately are still private API) now need to receive the
QPointerEvent too, which we choose to pass by pointer. QEventPoint is
always passed by reference (const where possible) to be consistent with
functions in QPointerEvent that take QEventPoint by reference.

QEventPoint::velocity() should be always in scene coordinates now, which
saves us the trouble of transforming it to each item's coordinate system
during delivery, but means that it will need to be done in handlers or
applications sometimes.  If we were going to transform it, it would be
important to also store the sceneVelocity separately in QEventPoint
so that the transformation could be done repeatedly for different items.

Task-number: QTBUG-72173
Change-Id: I7ee164d2e6893c4e407fb7d579c75aa32843933a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 0 insertions, 1636 deletions

diff --git a/src/quick/items/qquickevents.cpp b/src/quick/items/qquickevents.cpp
index 66e850f59c..ab7b407af5 100644
--- a/src/quick/items/qquickevents.cpp
+++ b/src/quick/items/qquickevents.cpp
@@ -51,7 +51,6 @@
 QT_BEGIN_NAMESPACE
 
 Q_LOGGING_CATEGORY(lcPointerEvents, "qt.quick.pointer.events")
-Q_LOGGING_CATEGORY(lcPtrGrab, "qt.quick.pointer.grab")
 
 /*!
     \qmltype KeyEvent
@@ -470,1639 +469,4 @@ Item {
     \l inverted always returns false.
 */
 
-/*!
-    \qmltype PointerDevice
-    \instantiates QPointingDevice
-    \inqmlmodule QtQuick
-    \ingroup qtquick-input-events
-
-    \brief Provides information about a pointing device.
-
-    A pointing device can be a mouse, a touchscreen, or a stylus on a graphics
-    tablet.
-
-    \sa PointerEvent, PointerHandler
-*/
-
-/*!
-    \readonly
-    \qmlproperty enumeration QtQuick::PointerDevice::type
-
-    This property holds the type of the pointing device.
-
-    Valid values are:
-
-    \value DeviceType.Unknown
-        the device cannot be identified
-    \value DeviceType.Mouse
-        a mouse
-    \value DeviceType.TouchScreen
-        a touchscreen providing absolute coordinates
-    \value DeviceType.TouchPad
-        a trackpad or touchpad providing relative coordinates
-    \value DeviceType.Stylus
-        a pen-like device
-    \value DeviceType.Airbrush
-        a stylus with a thumbwheel to adjust
-        \l {QTabletEvent::tangentialPressure}{tangentialPressure}
-    \value DeviceType.Puck
-        a device that is similar to a flat mouse with a
-        transparent circle with cross-hairs
-        (same as \l {QTabletEvent::Puck} {Puck})
-    \value DeviceType.AllDevices
-        any of the above; used as a default value for construction
-
-    \sa QPointingDevice::DeviceType
-*/
-
-/*!
-    \readonly
-    \qmlproperty enumeration QtQuick::PointerDevice::pointerType
-
-    This property holds a value indicating what is interacting with
-    the device. Think of the device as having a planar 2D surface, and
-    the value of this property as identifying what interacts with the
-    device.
-
-    There is some redundancy between this property and \l {PointerDevice::type}.
-    If a tocuchscreen is used, then the device is TouchScreen and
-    pointerType is Finger (always).
-
-    Valid values are:
-
-    \value PointerDevice.Generic
-        a mouse or something acting like a mouse (the core pointer on X11)
-    \value PointerDevice.Finger
-        the user's finger
-    \value PointerDevice.Pen
-        the drawing end of a stylus
-    \value PointerDevice.Eraser
-        the other end of the stylus (if it has a virtual eraser on the other end)
-    \value PointerDevice.Cursor
-        a cursor in the pre-computer sense of the word
-    \value PointerDevice.AllPointerTypes
-        any of the above (used as a default value in constructors)
-*/
-
-/*!
-    \readonly
-    \qmlproperty enumeration QtQuick::PointerDevice::capabilities
-
-    This property holds a bitwise combination of the capabilities of the
-    pointing device. It tells you under which conditions events are sent,
-    and which properties of PointerEvent are expected to be valid.
-
-    Valid values are:
-
-    \value Capability.Position
-        the \l {QtQuick::EventPoint::position}{position} and
-        \l {QtQuick::EventPoint::scenePosition}{scenePosition} properties
-    \value Capability.Area
-        the \l {QtQuick::EventTouchPoint::ellipseDiameters}{ellipseDiameters} property
-    \value Capability.Pressure
-        the \l {QtQuick::EventTouchPoint::pressure}{pressure} property
-    \value Capability.Velocity
-        the \l {QtQuick::EventPoint::velocity}{velocity} property
-    \value Capability.Scroll
-        a \l {QtQuick::PointerDevice::type}{Mouse} has a wheel, or the
-        operating system recognizes scroll gestures on a
-        \l {QtQuick::PointerDevice::type}{TouchPad}
-    \value Capability.Hover
-        events are sent even when no button is pressed, or the finger or stylus
-        is not in contact with the surface
-    \value Capability.Rotation
-        the \l {QtQuick::EventTouchPoint::rotation}{rotation} property
-    \value Capability.XTilt
-        horizontal angle between a stylus and the axis perpendicular to the surface
-    \value Capability.YTilt
-        vertical angle between a stylus and the axis perpendicular to the surface
-
-    \sa QPointingDevice::capabilities
-*/
-
-
-// debugging helpers
-static const char *pointStateString(const QQuickEventPoint *point)
-{
-    static const QMetaEnum stateMetaEnum = point->metaObject()->enumerator(point->metaObject()->indexOfEnumerator("State"));
-    return stateMetaEnum.valueToKey(point->state());
-}
-
-static const QString pointDeviceName(const QQuickEventPoint *point)
-{
-    auto device = static_cast<const QQuickPointerEvent *>(point->parent())->device();
-    QString deviceName = (device ? device->name() : QLatin1String("null device"));
-    deviceName.resize(16, u' '); // shorten, and align in case of sequential output
-    return deviceName;
-}
-
-/*!
-    \qmltype EventPoint
-    \qmlabstract
-    \instantiates QQuickEventPoint
-    \inqmlmodule QtQuick
-    \ingroup qtquick-input-events
-    \brief Provides information about an individual point within a PointerEvent.
-
-    A PointerEvent contains an EventPoint for each point of contact: one corresponding
-    to the mouse cursor, or one for each finger touching a touchscreen.
-
-    \sa PointerEvent, PointerHandler
-*/
-
-/*!
-    \readonly
-    \qmlproperty point QtQuick::EventPoint::position
-
-    This property holds the coordinates of the position supplied by the event,
-    relative to the upper-left corner of the Item which has the PointerHandler.
-    If a contact patch is available from the pointing device, this point
-    represents its centroid.
-*/
-
-/*!
-    \readonly
-    \qmlproperty point QtQuick::EventPoint::scenePosition
-
-    This property holds the coordinates of the position supplied by the event,
-    relative to the scene. If a contact patch is available from the
-    \l {QtQuick::PointerEvent::device} {device}, this point represents its centroid.
-*/
-
-/*!
-    \readonly
-    \qmlproperty point QtQuick::EventPoint::scenePressPosition
-
-    This property holds the scene-relative position at which the press event
-    (on a touch device) or most recent change in QQuickPointerEvent::buttons()
-    (on a mouse or tablet stylus) occurred.
-*/
-
-/*!
-    \readonly
-    \qmlproperty point QtQuick::EventPoint::sceneGrabPosition
-
-    This property holds the scene-relative position at which the EventPoint was
-    located when setGrabber() was called most recently.
-*/
-
-/*!
-    \readonly
-    \qmlproperty vector2d QtQuick::EventPoint::velocity
-
-    This property holds average recent velocity: how fast and in which
-    direction the event point has been moving recently.
-*/
-
-/*!
-    \readonly
-    \qmlproperty int QtQuick::EventPoint::state
-
-    This property tells what the user is currently doing at this point.
-
-    It can be one of:
-    \value Pressed
-        The user's finger is now pressing a touchscreen, button or stylus
-        which was not pressed already
-    \value Updated
-        The touchpoint or position is being moved, with no change in pressed state
-    \value Stationary
-        The touchpoint or position is not being moved, and there is also
-        no change in pressed state
-    \value Released
-        The user's finger has now released a touch point, button or stylus
-        which was pressed
-*/
-
-/*!
-    \readonly
-    \qmlproperty int QtQuick::EventPoint::pointId
-
-    This property holds the ID of the event, if any.
-
-    Touchpoints have automatically-incrementing IDs: each time the user
-    presses a finger against the touchscreen, it will be a larger number.
-    In other cases, it will be -1.
-
-    \sa {QtQuick::EventTouchPoint::uniqueId}{uniqueId}
-*/
-
-/*!
-    \readonly
-    \qmlproperty bool QtQuick::EventPoint::accepted
-
-    Setting \a accepted to true prevents the event from being propagated to
-    Items below the PointerHandler's Item.
-
-    Generally, if the handler acts on the mouse event, then it should be
-    accepted so that items lower in the stacking order do not also respond to
-    the same event.
-*/
-
-/*!
-    \readonly
-    \qmlproperty real QtQuick::EventPoint::timeHeld
-
-    This property holds the amount of time in seconds that the button or touchpoint has
-    been held.  It can be used to detect a "long press", and can drive an
-    animation to show progress toward activation of the "long press" action.
-*/
-
-void QQuickEventPoint::reset(QEventPoint::State state, const QPointF &scenePos, int pointId, ulong timestamp, const QVector2D &velocity)
-{
-    m_scenePos = scenePos;
-    m_pointId = pointId;
-    m_accept = false;
-    m_state = static_cast<QQuickEventPoint::State>(state);
-    m_timestamp = timestamp;
-    if (state == QEventPoint::State::Pressed) {
-        m_pressTimestamp = timestamp;
-        m_scenePressPos = scenePos;
-    }
-    m_velocity = (Q_LIKELY(velocity.isNull()) ? estimatedVelocity() : velocity);
-}
-
-void QQuickEventPoint::localizePosition(QQuickItem *target)
-{
-    if (target)
-        m_pos = target->mapFromScene(scenePosition());
-    else
-        m_pos = QPointF();
-}
-
-/*!
-    If this point has an exclusive grabber, returns a pointer to it; else
-    returns null, if there is no grabber.  The grabber could be either
-    an Item or a PointerHandler.
-*/
-QObject *QQuickEventPoint::exclusiveGrabber() const
-{
-    return m_exclusiveGrabber.data();
-}
-
-/*!
-    Set the given Item or PointerHandler as the exclusive grabber of this point.
-    If there was already an exclusive grab, it will be canceled.  If there
-    were passive grabbers, they will continue to lurk, but the exclusive grab
-    is a behavioral override of the passive grab as long as it remains.
-    If you already know whether the grabber is to be an Item or a PointerHandler,
-    you should instead call setGrabberItem() or setGrabberPointerHandler(),
-    because it is slightly more efficient.
-*/
-void QQuickEventPoint::setExclusiveGrabber(QObject *grabber)
-{
-    if (QQuickPointerHandler *phGrabber = qmlobject_cast<QQuickPointerHandler *>(grabber))
-        setGrabberPointerHandler(phGrabber, true);
-    else
-        setGrabberItem(static_cast<QQuickItem *>(grabber));
-}
-
-/*!
-    If the exclusive grabber of this point is an Item, returns a
-    pointer to that Item; else returns null, if there is no grabber or if
-    the grabber is a PointerHandler.
-*/
-QQuickItem *QQuickEventPoint::grabberItem() const
-{
-    return (m_grabberIsHandler ? nullptr : static_cast<QQuickItem *>(m_exclusiveGrabber.data()));
-}
-
-/*!
-    Set the given Item \a grabber as the exclusive grabber of this point.
-    If there was already an exclusive grab, it will be canceled.  If there
-    were passive grabbers, they will continue to lurk, but the exclusive grab
-    is a behavioral override of the passive grab as long as it remains.
-*/
-void QQuickEventPoint::setGrabberItem(QQuickItem *grabber)
-{
-    if (grabber != m_exclusiveGrabber.data()) {
-        QQuickPointerHandler *oldGrabberHandler = grabberPointerHandler();
-        if (oldGrabberHandler && !oldGrabberHandler->approveGrabTransition(this, grabber))
-            return;
-        if (Q_UNLIKELY(lcPtrGrab().isDebugEnabled())) {
-            qCDebug(lcPtrGrab) << pointDeviceName(this) << "point" << Qt::hex << m_pointId << pointStateString(this) << "@" << m_scenePos
-                                   << ": grab" << m_exclusiveGrabber << "->" << grabber;
-        }
-        QQuickItem *oldGrabberItem = grabberItem();
-        m_exclusiveGrabber = QPointer<QObject>(grabber);
-        m_grabberIsHandler = false;
-        m_sceneGrabPos = m_scenePos;
-        if (oldGrabberHandler) {
-            oldGrabberHandler->onGrabChanged(oldGrabberHandler, (grabber ? CancelGrabExclusive : UngrabExclusive), this);
-        } else if (oldGrabberItem && oldGrabberItem != grabber && grabber && grabber->window()) {
-            QQuickWindowPrivate *windowPriv = QQuickWindowPrivate::get(grabber->window());
-            windowPriv->sendUngrabEvent(oldGrabberItem, windowPriv->isDeliveringTouchAsMouse());
-        }
-        if (grabber) {
-            for (QPointer<QQuickPointerHandler> passiveGrabber : m_passiveGrabbers)
-                if (passiveGrabber)
-                    passiveGrabber->onGrabChanged(passiveGrabber, OverrideGrabPassive, this);
-        }
-    }
-}
-
-/*!
-    If the exclusive grabber of this point is a PointerHandler, returns a
-    pointer to that handler; else returns null, if there is no grabber or if
-    the grabber is an Item.
-*/
-QQuickPointerHandler *QQuickEventPoint::grabberPointerHandler() const
-{
-    return (m_grabberIsHandler ? static_cast<QQuickPointerHandler *>(m_exclusiveGrabber.data()) : nullptr);
-}
-
-/*!
-    Set the given PointerHandler \a grabber as grabber of this point. If \a
-    exclusive is true, it will override any other grabs; if false, \a grabber
-    will be added to the list of passive grabbers of this point.
-*/
-void QQuickEventPoint::setGrabberPointerHandler(QQuickPointerHandler *grabber, bool exclusive)
-{
-    if (Q_UNLIKELY(lcPtrGrab().isDebugEnabled())) {
-        if (exclusive) {
-            if (m_exclusiveGrabber != grabber)
-                qCDebug(lcPtrGrab) << pointDeviceName(this) << "point" << Qt::hex << m_pointId << pointStateString(this)
-                                       << ": grab (exclusive)" << m_exclusiveGrabber << "->" << grabber;
-        } else {
-            qCDebug(lcPtrGrab) << pointDeviceName(this) << "point" << Qt::hex << m_pointId << pointStateString(this)
-                                   << ": grab (passive)" << grabber;
-        }
-    }
-    if (exclusive) {
-        if (grabber != m_exclusiveGrabber.data()) {
-            QQuickPointerHandler *oldGrabberHandler = grabberPointerHandler();
-            QQuickItem *oldGrabberItem = grabberItem();
-            m_exclusiveGrabber = QPointer<QObject>(grabber);
-            m_grabberIsHandler = true;
-            m_sceneGrabPos = m_scenePos;
-            if (grabber) {
-                grabber->onGrabChanged(grabber, GrabExclusive, this);
-                for (QPointer<QQuickPointerHandler> passiveGrabber : m_passiveGrabbers) {
-                    if (!passiveGrabber.isNull() && passiveGrabber != grabber)
-                        passiveGrabber->onGrabChanged(grabber, OverrideGrabPassive, this);
-                }
-            }
-            if (oldGrabberHandler) {
-                oldGrabberHandler->onGrabChanged(oldGrabberHandler, (grabber ? CancelGrabExclusive : UngrabExclusive), this);
-            } else if (oldGrabberItem) {
-                if (pointerEvent()->asPointerTouchEvent())
-                    oldGrabberItem->touchUngrabEvent();
-                else if (pointerEvent()->asPointerMouseEvent())
-                    oldGrabberItem->mouseUngrabEvent();
-            }
-            // touchUngrabEvent() can result in the grabber being set to null (MPTA does that, for example).
-            // So set it again to ensure that final state is what we want.
-            m_exclusiveGrabber = QPointer<QObject>(grabber);
-            m_grabberIsHandler = true;
-            m_sceneGrabPos = m_scenePos;
-        }
-    } else {
-        if (!grabber) {
-            qDebug() << "can't set passive grabber to null";
-            return;
-        }
-        auto ptr = QPointer<QQuickPointerHandler>(grabber);
-        if (!m_passiveGrabbers.contains(ptr)) {
-            m_passiveGrabbers.append(ptr);
-            grabber->onGrabChanged(grabber, GrabPassive, this);
-        }
-    }
-}
-
-/*!
-    If this point has an existing exclusive grabber (Item or PointerHandler),
-    inform the grabber that its grab is canceled, and remove it as grabber.
-    This normally happens when the grab is stolen by another Item.
-*/
-void QQuickEventPoint::cancelExclusiveGrab()
-{
-    if (m_exclusiveGrabber.isNull())
-        qWarning("cancelGrab: no grabber");
-    else
-        cancelExclusiveGrabImpl();
-}
-
-void QQuickEventPoint::cancelExclusiveGrabImpl(QTouchEvent *cancelEvent)
-{
-    if (m_exclusiveGrabber.isNull())
-        return;
-    if (Q_UNLIKELY(lcPtrGrab().isDebugEnabled())) {
-        qCDebug(lcPtrGrab) << pointDeviceName(this) << "point" << Qt::hex << m_pointId << pointStateString(this)
-                               << ": grab (exclusive)" << m_exclusiveGrabber << "-> nullptr";
-    }
-    if (auto handler = grabberPointerHandler()) {
-        handler->onGrabChanged(handler, CancelGrabExclusive, this);
-    } else if (auto item = grabberItem()) {
-        if (cancelEvent)
-            QCoreApplication::sendEvent(item, cancelEvent);
-        else
-            item->touchUngrabEvent();
-    }
-    m_exclusiveGrabber.clear();
-}
-
-/*!
-    If this point has the given \a handler as a passive grabber,
-    inform the grabber that its grab is canceled, and remove it as grabber.
-    This normally happens when another Item or PointerHandler does an exclusive grab.
-*/
-void QQuickEventPoint::cancelPassiveGrab(QQuickPointerHandler *handler)
-{
-    if (removePassiveGrabber(handler)) {
-        if (Q_UNLIKELY(lcPtrGrab().isDebugEnabled())) {
-            qCDebug(lcPtrGrab) << pointDeviceName(this) << "point" << Qt::hex << m_pointId << pointStateString(this)
-                                   << ": grab (passive)" << handler << "removed";
-        }
-        handler->onGrabChanged(handler, CancelGrabPassive, this);
-    }
-}
-
-/*!
-    If this point has the given \a handler as a passive grabber, remove it as grabber.
-    Returns true if it was removed, false if it wasn't a grabber.
-*/
-bool QQuickEventPoint::removePassiveGrabber(QQuickPointerHandler *handler)
-{
-    return m_passiveGrabbers.removeOne(handler);
-}
-
-/*!
-    If the given \a handler is grabbing this point passively, exclusively
-    or both, cancel the grab and remove it as grabber.
-    This normally happens when the handler decides that the behavior of this
-    point can no longer satisfy the handler's behavioral constraints within
-    the remainder of the gesture which the user is performing: for example
-    the handler tries to detect a tap but a drag is occurring instead, or
-    it tries to detect a drag in one direction but the drag is going in
-    another direction.  In such cases the handler no longer needs or wants
-    to be informed of any further movements of this point.
-*/
-void QQuickEventPoint::cancelAllGrabs(QQuickPointerHandler *handler)
-{
-    if (m_exclusiveGrabber == handler) {
-        handler->onGrabChanged(handler, CancelGrabExclusive, this);
-        m_exclusiveGrabber.clear();
-    }
-    cancelPassiveGrab(handler);
-}
-
-/*!
-    Sets this point as \a accepted (true) or rejected (false).
-
-    During delivery of the current event to the Items in the scene, each Item
-    or Pointer Handler should accept the points for which it is taking
-    responsibility. As soon as all points within the event are accepted, event
-    propagation stops. However accepting the point does not imply any kind of
-    grab, passive or exclusive.
-
-    \sa setExclusiveGrabber, QQuickPointerHandler::setPassiveGrab, QQuickPointerHandler::setExclusiveGrab
-*/
-void QQuickEventPoint::setAccepted(bool accepted)
-{
-    if (m_accept != accepted) {
-        qCDebug(lcPointerEvents) << this << m_accept << "->" << accepted;
-        m_accept = accepted;
-    }
-}
-
-
-/*!
-    \qmltype EventTouchPoint
-    \qmlabstract
-    \instantiates QQuickEventTouchPoint
-    \inqmlmodule QtQuick
-    \ingroup qtquick-input-events
-    \brief Provides information about an individual touch point within a PointerEvent.
-
-    \sa PointerEvent, PointerHandler
-*/
-
-/*!
-    \readonly
-    \qmlproperty QPointerUniqueId QtQuick::EventTouchPoint::uniqueId
-
-    This property holds the unique ID of the fiducial or stylus in use, if any.
-
-    On touchscreens that can track physical objects (such as knobs or game
-    pieces) in addition to fingers, each object usually has a unique ID.
-    Likewise, each stylus that can be used with a graphics tablet usually has a
-    unique serial number. Qt so far only supports numeric IDs. You can get the
-    actual number as uniqueId.numeric, but that is a device-specific detail.
-    In the future, there may be support for non-numeric IDs, so you should
-    not assume that the number is meaningful.
-
-    If you need to identify specific objects, your application should provide
-    UI for registering objects and mapping them to functionality: allow the
-    user to select a meaning, virtual tool, or action, prompt the user to bring
-    the object into proximity, and store a mapping from uniqueId to its
-    purpose, for example in \l Settings.
-*/
-
-/*!
-    \readonly
-    \qmlproperty qreal QtQuick::EventTouchPoint::rotation
-
-    This property holds the rotation angle of the stylus on a graphics tablet
-    or the contact patch of a touchpoint on a touchscreen.
-
-    It is valid only with certain tablet stylus devices and touchscreens that
-    can measure the rotation angle. Otherwise, it will be zero.
-*/
-
-/*!
-    \readonly
-    \qmlproperty qreal QtQuick::EventTouchPoint::pressure
-
-    This property tells how hard the user is pressing the stylus on a graphics
-    tablet or the finger against a touchscreen, in the range from \c 0 (no
-    measurable pressure) to \c 1.0 (maximum pressure which the device can
-    measure).
-
-    It is valid only with certain tablets and touchscreens that can measure
-    pressure. Otherwise, it will be \c 1.0 when pressed.
-*/
-
-/*!
-    \readonly
-    \qmlproperty size QtQuick::EventTouchPoint::ellipseDiameters
-
-    This property holds the diameters of the contact patch, if the event
-    comes from a touchpoint and the \l {QtQuick::PointerEvent::device} {device}
-    provides this information.
-
-    A touchpoint is modeled as an elliptical area where the finger is
-    pressed against the touchscreen. (In fact, it could also be
-    modeled as a bitmap; but in that case we expect an elliptical
-    bounding estimate to be fitted to the contact patch before the
-    event is sent.) The harder the user presses, the larger the
-    contact patch; so, these diameters provide an alternate way of
-    detecting pressure, in case the device does not include a separate
-    pressure sensor. The ellipse is centered on
-    \l {QtQuick::EventPoint::scenePosition} {scenePosition}
-    (\l {QtQuick::EventPoint::position} {position} in the PointerHandler's
-    Item's local coordinates).  The \l rotation property provides the
-    rotation of the ellipse, if known.  It is expected that if the
-    \l rotation is zero, the verticalDiameter of the ellipse is the
-    larger one (the major axis), because of the usual hand position,
-    reaching upward or outward across the surface.
-
-    If the contact patch is unknown, or the \l {QtQuick::PointerEvent::device} {device}
-    is not a touchscreen, these values will be zero.
-*/
-
-QQuickEventTouchPoint::QQuickEventTouchPoint(QQuickPointerTouchEvent *parent)
-    : QQuickEventPoint(parent), m_rotation(0), m_pressure(0)
-{}
-
-void QQuickEventTouchPoint::reset(const QEventPoint &tp, ulong timestamp)
-{
-    QQuickEventPoint::reset(tp.state(), tp.scenePosition(), tp.id(), timestamp, tp.velocity());
-    m_exclusiveGrabber.clear();
-    m_passiveGrabbers.clear();
-    m_rotation = tp.rotation();
-    m_pressure = tp.pressure();
-    m_ellipseDiameters = tp.ellipseDiameters();
-    m_uniqueId = tp.uniqueId();
-}
-
-struct PointVelocityData {
-    QVector2D velocity;
-    QPointF pos;
-    ulong timestamp = 0;
-};
-
-typedef QMap<quint64, PointVelocityData> PointDataForPointIdMap;
-Q_GLOBAL_STATIC(PointDataForPointIdMap, g_previousPointData)
-static const int PointVelocityAgeLimit = 500; // milliseconds
-
-/*!
-    \internal
-    Estimates the velocity based on a weighted average of all previous velocities.
-    The older the velocity is, the less significant it becomes for the estimate.
-*/
-QVector2D QQuickEventPoint::estimatedVelocity() const
-{
-    auto prevPointIt = g_previousPointData->find(m_pointId);
-    auto end = g_previousPointData->end();
-    if (prevPointIt == end) {
-        // cleanup events older than PointVelocityAgeLimit
-        for (auto it = g_previousPointData->begin(); it != end; ) {
-            if (m_timestamp - it->timestamp > PointVelocityAgeLimit)
-                it = g_previousPointData->erase(it);
-            else
-                ++it;
-        }
-        prevPointIt = g_previousPointData->insert(m_pointId, PointVelocityData());
-    }
-
-    auto &prevPoint = prevPointIt.value();
-    const ulong timeElapsed = m_timestamp - prevPoint.timestamp;
-    if (timeElapsed == 0)   // in case we call estimatedVelocity() twice on the same QQuickEventPoint
-        return m_velocity;
-
-    QVector2D newVelocity;
-    if (prevPoint.timestamp != 0)
-        newVelocity = QVector2D(m_scenePos - prevPoint.pos) / timeElapsed;
-
-    // VERY simple kalman filter: does a weighted average
-    // where the older velocities get less and less significant
-    static const float KalmanGain = 0.7f;
-    QVector2D filteredVelocity = newVelocity * KalmanGain + m_velocity * (1.0f - KalmanGain);
-
-    prevPoint.velocity = filteredVelocity;
-    prevPoint.pos = m_scenePos;
-    prevPoint.timestamp = m_timestamp;
-    return filteredVelocity;
-}
-
-/*!
-    \qmltype PointerEvent
-    \instantiates QQuickPointerEvent
-    \inqmlmodule QtQuick
-    \ingroup qtquick-input-events
-
-    \brief Provides information about an event from a pointing device.
-
-    A PointerEvent is an event describing contact or movement across a surface,
-    provided by a mouse, a touchpoint (single finger on a touchscreen), or a
-    stylus on a graphics tablet. The \l {QtQuick::PointerEvent::device} {device}
-    property provides more information about where the event came from.
-
-    \sa PointerHandler
-
-    \image touchpoint-metrics.png
-*/
-
-/*!
-    \internal
-    \class QQuickPointerEvent
-
-    QQuickPointerEvent is used as a long-lived object to store data related to
-    an event from a pointing device, such as a mouse, touch or tablet event,
-    during event delivery. It also provides properties which may be used later
-    to expose the event to QML, the same as is done with QQuickMouseEvent,
-    QQuickTouchPoint, QQuickKeyEvent, etc. Since only one event can be
-    delivered at a time, this class is effectively a singleton.  We don't worry
-    about the QObject overhead because the instances are long-lived: we don't
-    dynamically create and destroy objects of this type for each event.
-*/
-
-/*!
-    \readonly
-    \qmlproperty enumeration QtQuick::PointerEvent::button
-
-    This property holds the \l {Qt::MouseButton}{button} that caused the event,
-    if any. If the \l {QtQuick::PointerEvent::device} {device} does not have
-    buttons, or the event is a hover event, it will be \c Qt.NoButton.
-*/
-
-/*!
-    \readonly
-    \qmlproperty int QtQuick::PointerEvent::buttons
-
-    This property holds the combination of mouse or stylus
-    \l {Qt::MouseButton}{buttons} pressed when the event was generated. For move
-    events, this is all buttons that are pressed down.  For press events, this
-    includes the button that caused the event, as well as any others that were
-    already held.  For release events, this excludes the button that caused the
-    event.
-*/
-
-/*!
-    \readonly
-    \qmlproperty int QtQuick::PointerEvent::modifiers
-
-    This property holds the \l {Qt::KeyboardModifier}{keyboard modifier} flags
-    that existed immediately before the event occurred.
-
-    It contains a bitwise combination of the following flags:
-    \value Qt.NoModifier
-        No modifier key is pressed.
-    \value Qt.ShiftModifier
-        A Shift key on the keyboard is pressed.
-    \value Qt.ControlModifier
-        A Ctrl key on the keyboard is pressed.
-    \value Qt.AltModifier
-        An Alt key on the keyboard is pressed.
-    \value Qt.MetaModifier
-        A Meta key on the keyboard is pressed.
-    \value Qt.KeypadModifier
-        A keypad button is pressed.
-
-    For example, to react to a Shift key + Left mouse button click:
-    \qml
-    Item {
-        TapHandler {
-            onTapped: {
-                if ((event.button == Qt.LeftButton) && (event.modifiers & Qt.ShiftModifier))
-                    doSomething();
-            }
-        }
-    }
-    \endqml
-*/
-
-/*!
-    \readonly
-    \qmlproperty PointerDevice QtQuick::PointerEvent::device
-
-    This property holds the device that generated the event.
-*/
-
-QQuickPointerEvent::~QQuickPointerEvent()
-{}
-
-QQuickPointerMouseEvent::QQuickPointerMouseEvent(QObject *parent, const QPointingDevice *device)
-    : QQuickSinglePointEvent(parent, device)
-{
-    m_point = new QQuickEventPoint(this);
-}
-
-QQuickPointerEvent *QQuickPointerMouseEvent::reset(QEvent *event)
-{
-    auto ev = static_cast<QMouseEvent*>(event);
-    m_event = ev;
-    if (!event)
-        return this;
-
-    QQuickPointerHandlerPrivate::deviceDeliveryTargets(ev->device()).clear();
-    m_button = ev->button();
-    m_pressedButtons = ev->buttons();
-    QEventPoint::State state = QEventPoint::State::Stationary;
-    switch (ev->type()) {
-    case QEvent::MouseButtonPress:
-        m_point->clearPassiveGrabbers();
-        Q_FALLTHROUGH();
-    case QEvent::MouseButtonDblClick:
-        state = QEventPoint::State::Pressed;
-        break;
-    case QEvent::MouseButtonRelease:
-        state = QEventPoint::State::Released;
-        break;
-    case QEvent::MouseMove:
-        state = QEventPoint::State::Updated;
-        break;
-    default:
-        break;
-    }
-    m_point->reset(state, ev->scenePosition(), ev->point(0).id(), ev->timestamp());
-    return this;
-}
-
-void QQuickSinglePointEvent::localize(QQuickItem *target)
-{
-    m_point->localizePosition(target);
-}
-
-QQuickPointerEvent *QQuickPointerTouchEvent::reset(QEvent *event)
-{
-    auto ev = static_cast<QTouchEvent*>(event);
-    m_event = ev;
-    if (!event)
-        return this;
-
-    QQuickPointerHandlerPrivate::deviceDeliveryTargets(ev->device()).clear();
-    m_button = Qt::NoButton;
-    m_pressedButtons = Qt::NoButton;
-
-    const QList<QEventPoint> &tps = ev->touchPoints();
-    int newPointCount = tps.count();
-    m_touchPoints.reserve(newPointCount);
-
-    for (int i = m_touchPoints.size(); i < newPointCount; ++i)
-        m_touchPoints.insert(i, new QQuickEventTouchPoint(this));
-
-    // Make sure the grabbers and on-pressed values are right from one event to the next
-    struct ToPreserve {
-        int pointId; // just for double-checking
-        ulong pressTimestamp;
-        QPointF scenePressPos;
-        QPointF sceneGrabPos;
-        QObject * grabber;
-        QVector <QPointer <QQuickPointerHandler> > passiveGrabbers;
-
-        ToPreserve() : pointId(0), pressTimestamp(0), grabber(nullptr) {}
-    };
-    QVector<ToPreserve> preserves(newPointCount); // jar of pickled touchpoints, in order of points in the _new_ event
-
-    // Copy stuff we need to preserve, because the order of points might have changed in the event.
-    // The ID is all that we can rely on (release might remove the first point etc).
-    for (int i = 0; i < newPointCount; ++i) {
-        int pid = tps.at(i).id();
-        if (auto point = pointById(pid)) {
-            preserves[i].pointId = pid;
-            preserves[i].pressTimestamp = point->m_pressTimestamp;
-            preserves[i].scenePressPos = point->scenePressPosition();
-            preserves[i].sceneGrabPos = point->sceneGrabPosition();
-            preserves[i].grabber = point->exclusiveGrabber();
-            preserves[i].passiveGrabbers = point->passiveGrabbers();
-        }
-    }
-
-    for (int i = 0; i < newPointCount; ++i) {
-        auto point = m_touchPoints.at(i);
-        point->reset(tps.at(i), ev->timestamp());
-        const auto &preserved = preserves.at(i);
-        if (point->state() == QQuickEventPoint::Pressed) {
-            if (preserved.grabber)
-                qWarning() << "TouchPointPressed without previous release event" << point;
-            point->setGrabberItem(nullptr);
-            point->clearPassiveGrabbers();
-        } else {
-            // Restore the grabbers without notifying (don't call onGrabChanged)
-            Q_ASSERT(preserved.pointId == 0 || preserved.pointId == point->pointId());
-            point->m_pressTimestamp = preserved.pressTimestamp;
-            point->m_scenePressPos = preserved.scenePressPos;
-            point->m_sceneGrabPos = preserved.sceneGrabPos;
-            point->m_exclusiveGrabber = preserved.grabber;
-            point->m_grabberIsHandler = (qmlobject_cast<QQuickPointerHandler *>(point->m_exclusiveGrabber) != nullptr);
-            point->m_passiveGrabbers = preserved.passiveGrabbers;
-        }
-    }
-    m_pointCount = newPointCount;
-    return this;
-}
-
-void QQuickPointerTouchEvent::localize(QQuickItem *target)
-{
-    for (auto point : qAsConst(m_touchPoints))
-        point->localizePosition(target);
-}
-
-#if QT_CONFIG(gestures)
-QQuickPointerNativeGestureEvent::QQuickPointerNativeGestureEvent(QObject *parent, const QPointingDevice *device)
-    : QQuickSinglePointEvent(parent, device)
-{
-    m_point = new QQuickEventPoint(this);
-}
-
-QQuickPointerEvent *QQuickPointerNativeGestureEvent::reset(QEvent *event)
-{
-    auto ev = static_cast<QNativeGestureEvent*>(event);
-    m_event = ev;
-    if (!event)
-        return this;
-
-    QQuickPointerHandlerPrivate::deviceDeliveryTargets(ev->device()).clear();
-    QEventPoint::State state = QEventPoint::State::Updated;
-    switch (type()) {
-    case Qt::BeginNativeGesture:
-        state = QEventPoint::State::Pressed;
-        break;
-    case Qt::EndNativeGesture:
-        state = QEventPoint::State::Released;
-        break;
-    default:
-        break;
-    }
-    m_point->reset(state, ev->scenePosition(), ev->point(0).id(), ev->timestamp());
-    return this;
-}
-#endif // QT_CONFIG(gestures)
-
-QQuickEventPoint *QQuickSinglePointEvent::point(int i) const
-{
-    if (i == 0)
-        return m_point;
-    return nullptr;
-}
-
-
-/*!
-    \qmltype PointerScrollEvent
-    \instantiates QQuickPointerScrollEvent
-    \inqmlmodule QtQuick
-    \ingroup qtquick-input-events
-    \brief Provides information about a scrolling event, such as from a mouse wheel.
-
-    \sa WheelHandler
-*/
-
-/*!
-    \internal
-    \class QQuickPointerScrollEvent
-*/
-
-/*!
-    \readonly
-    \qmlproperty PointerDevice QtQuick::PointerScrollEvent::device
-
-    This property holds the device that generated the event.
-*/
-
-/*!
-    \qmlproperty int QtQuick::PointerScrollEvent::buttons
-
-    This property holds the mouse buttons pressed when the wheel event was generated.
-
-    It contains a bitwise combination of:
-    \list
-    \li \l {Qt::LeftButton} {Qt.LeftButton}
-    \li \l {Qt::RightButton} {Qt.RightButton}
-    \li \l {Qt::MiddleButton} {Qt.MiddleButton}
-    \endlist
-*/
-
-/*!
-    \readonly
-    \qmlproperty int QtQuick::PointerScrollEvent::modifiers
-
-    This property holds the \l {Qt::KeyboardModifier}{keyboard modifier} keys
-    that were pressed immediately before the event occurred.
-
-    It contains a bitwise combination of the following flags:
-    \value Qt.NoModifier
-        No modifier key is pressed.
-    \value Qt.ShiftModifier
-        A Shift key on the keyboard is pressed.
-    \value Qt.ControlModifier
-        A Ctrl key on the keyboard is pressed.
-    \value Qt.AltModifier
-        An Alt key on the keyboard is pressed.
-    \value Qt.MetaModifier
-        A Meta key on the keyboard is pressed.
-    \value Qt.KeypadModifier
-        A keypad button is pressed.
-
-    For example, to react to a Shift key + Left mouse button click:
-    \qml
-    Item {
-        TapHandler {
-            onTapped: {
-                if ((event.button == Qt.LeftButton) && (event.modifiers & Qt.ShiftModifier))
-                    doSomething();
-            }
-        }
-    }
-    \endqml
-*/
-
-/*!
-    \qmlproperty point QtQuick::PointerScrollEvent::angleDelta
-
-    This property holds the distance that the wheel is rotated in wheel degrees.
-    The x and y cordinate of this property holds the delta in horizontal and
-    vertical orientation.
-
-    A positive value indicates that the wheel was rotated up/right;
-    a negative value indicates that the wheel was rotated down/left.
-
-    Most mouse types work in steps of 15 degrees, in which case the delta value is a
-    multiple of 120; i.e., 120 units * 1/8 = 15 degrees.
-*/
-
-/*!
-    \qmlproperty point QtQuick::PointerScrollEvent::pixelDelta
-
-    This property holds the delta in screen pixels and is available in platforms that
-    have high-resolution trackpads, such as \macos.
-    The x and y coordinates of this property hold the delta in horizontal and
-    vertical orientation. The value should be used directly to scroll content on screen.
-
-    For platforms without high-resolution touchpad support, pixelDelta will
-    always be (0,0), and angleDelta should be used instead.
-*/
-
-/*!
-    \qmlproperty bool QtQuick::PointerScrollEvent::hasAngleDelta
-
-    Returns whether the \l angleDelta property has a non-null value.
-*/
-
-/*!
-    \qmlproperty bool QtQuick::PointerScrollEvent::hasPixelDelta
-
-    Returns whether the \l pixelDelta property has a non-null value.
-*/
-
-/*!
-    \qmlproperty bool QtQuick::PointerScrollEvent::inverted
-
-    Returns whether the delta values delivered with the event are inverted.
-
-    Normally, a vertical wheel will produce a PointerScrollEvent with positive delta
-    values if the top of the wheel is rotating away from the hand operating it.
-    Similarly, a horizontal wheel movement will produce a PointerScrollEvent with
-    positive delta values if the top of the wheel is moved to the left.
-
-    However, on some platforms this is configurable, so that the same
-    operations described above will produce negative delta values (but with the
-    same magnitude). In a QML component (such as a tumbler or a slider) where
-    it is appropriate to synchronize the movement or rotation of an item with
-    the direction of the wheel, regardless of the system settings, the wheel
-    event handler can use the inverted property to decide whether to negate the
-    \l angleDelta or \l pixelDelta values.
-
-    \note Many platforms provide no such information. On such platforms,
-    \c inverted always returns false.
-*/
-QQuickPointerScrollEvent::QQuickPointerScrollEvent(QObject *parent, const QPointingDevice *device)
-    : QQuickSinglePointEvent(parent, device)
-{
-    m_point = new QQuickEventPoint(this);
-}
-
-QQuickPointerEvent *QQuickPointerScrollEvent::reset(QEvent *event)
-{
-    m_event = static_cast<QPointerEvent*>(event);
-    if (!event)
-        return this;
-#if QT_CONFIG(wheelevent)
-    if (event->type() == QEvent::Wheel) {
-        auto ev = static_cast<QWheelEvent*>(event);
-        QQuickPointerHandlerPrivate::deviceDeliveryTargets(ev->device()).clear();
-        // m_button = Qt::NoButton;
-        m_pressedButtons = ev->buttons();
-        m_angleDelta = QVector2D(ev->angleDelta());
-        m_pixelDelta = QVector2D(ev->pixelDelta());
-        m_phase = ev->phase();
-        m_synthSource = ev->source();
-        m_inverted = ev->inverted();
-        m_point->reset(QEventPoint::State::Updated, ev->position(), ev->point(0).id(), ev->timestamp());
-    }
-#endif
-    // TODO else if (event->type() == QEvent::Scroll) ...
-    return this;
-}
-
-void QQuickPointerScrollEvent::localize(QQuickItem *target)
-{
-    m_point->localizePosition(target);
-}
-
-QQuickEventPoint *QQuickPointerTouchEvent::point(int i) const
-{
-    if (i >= 0 && i < m_pointCount)
-        return m_touchPoints.at(i);
-    return nullptr;
-}
-
-QQuickEventPoint::QQuickEventPoint(QQuickPointerEvent *parent)
-  : QObject(parent), m_pointId(0), m_exclusiveGrabber(nullptr), m_timestamp(0), m_pressTimestamp(0),
-    m_state(QQuickEventPoint::Released), m_accept(false), m_grabberIsHandler(false)
-{
-    Q_UNUSED(m_reserved);
-}
-
-QQuickPointerEvent *QQuickEventPoint::pointerEvent() const
-{
-    return static_cast<QQuickPointerEvent *>(parent());
-}
-
-bool QQuickSinglePointEvent::allPointsAccepted() const
-{
-    return m_point->isAccepted();
-}
-
-bool QQuickSinglePointEvent::allUpdatedPointsAccepted() const
-{
-    return m_point->state() == QQuickEventPoint::Pressed || m_point->isAccepted();
-}
-
-bool QQuickSinglePointEvent::allPointsGrabbed() const
-{
-    return m_point->exclusiveGrabber() != nullptr;
-}
-
-QMouseEvent *QQuickPointerMouseEvent::asMouseEvent(const QPointF &localPos) const
-{
-    if (!m_event)
-        return nullptr;
-    static_cast<QMutableSinglePointEvent *>(m_event)->mutablePoint().setPosition(localPos);
-    return static_cast<QMouseEvent *>(m_event);
-}
-
-/*!
-    Returns the exclusive grabber of this event, if any, in a vector.
-*/
-QVector<QObject *> QQuickSinglePointEvent::exclusiveGrabbers() const
-{
-    QVector<QObject *> result;
-    if (QObject *grabber = m_point->exclusiveGrabber())
-        result << grabber;
-    return result;
-}
-
-/*!
-    Remove all passive and exclusive grabbers of this event, without notifying.
-*/
-void QQuickSinglePointEvent::clearGrabbers() const
-{
-    m_point->setGrabberItem(nullptr);
-    m_point->clearPassiveGrabbers();
-}
-
-/*!
-    Returns whether the given \a handler is the exclusive grabber of this event.
-*/
-bool QQuickSinglePointEvent::hasExclusiveGrabber(const QQuickPointerHandler *handler) const
-{
-    return handler && (m_point->exclusiveGrabber() == handler);
-}
-
-bool QQuickPointerMouseEvent::isPressEvent() const
-{
-    if (!m_event)
-        return false;
-    auto me = static_cast<QMouseEvent*>(m_event);
-    return ((me->type() == QEvent::MouseButtonPress || me->type() == QEvent::MouseButtonDblClick) &&
-            (me->buttons() & me->button()) == me->buttons());
-}
-
-bool QQuickPointerMouseEvent::isDoubleClickEvent() const
-{
-    if (!m_event)
-        return false;
-    auto me = static_cast<QMouseEvent*>(m_event);
-    return (me->type() == QEvent::MouseButtonDblClick);
-}
-
-bool QQuickPointerMouseEvent::isUpdateEvent() const
-{
-    if (!m_event)
-        return false;
-    auto me = static_cast<QMouseEvent*>(m_event);
-    return me->type() == QEvent::MouseMove;
-}
-
-bool QQuickPointerMouseEvent::isReleaseEvent() const
-{
-    if (!m_event)
-        return false;
-    auto me = static_cast<QMouseEvent*>(m_event);
-    return me && me->type() == QEvent::MouseButtonRelease;
-}
-
-bool QQuickPointerTouchEvent::allPointsAccepted() const
-{
-    for (int i = 0; i < m_pointCount; ++i) {
-        if (!m_touchPoints.at(i)->isAccepted())
-            return false;
-    }
-    return true;
-}
-
-bool QQuickPointerTouchEvent::allUpdatedPointsAccepted() const
-{
-    for (int i = 0; i < m_pointCount; ++i) {
-        auto point = m_touchPoints.at(i);
-        if (point->state() != QQuickEventPoint::Pressed && !point->isAccepted())
-            return false;
-    }
-    return true;
-}
-
-bool QQuickPointerTouchEvent::allPointsGrabbed() const
-{
-    for (int i = 0; i < m_pointCount; ++i) {
-        if (!m_touchPoints.at(i)->exclusiveGrabber())
-            return false;
-    }
-    return true;
-}
-
-/*!
-    Returns the exclusive grabbers of all points in this event, if any, in a vector.
-*/
-QVector<QObject *> QQuickPointerTouchEvent::exclusiveGrabbers() const
-{
-    QVector<QObject *> result;
-    for (int i = 0; i < m_pointCount; ++i) {
-        if (QObject *grabber = m_touchPoints.at(i)->exclusiveGrabber()) {
-            if (!result.contains(grabber))
-                result << grabber;
-        }
-    }
-    return result;
-}
-
-/*!
-    Remove all passive and exclusive grabbers of all touchpoints in this event,
-    without notifying.
-*/
-void QQuickPointerTouchEvent::clearGrabbers() const
-{
-    for (auto point: m_touchPoints) {
-        point->setGrabberItem(nullptr);
-        point->clearPassiveGrabbers();
-    }
-}
-
-QEventPoint::States QQuickPointerTouchEvent::touchPointStates() const
-{
-    return m_event
-        ? static_cast<QTouchEvent*>(m_event)->touchPointStates()
-        : QEventPoint::States();
-}
-
-/*!
-    Returns whether the given \a handler is the exclusive grabber of any
-    touchpoint within this event.
-*/
-bool QQuickPointerTouchEvent::hasExclusiveGrabber(const QQuickPointerHandler *handler) const
-{
-    for (auto point: m_touchPoints)
-        if (point->exclusiveGrabber() == handler)
-            return true;
-    return false;
-}
-
-bool QQuickPointerTouchEvent::isPressEvent() const
-{
-    return touchPointStates() & QEventPoint::State::Pressed;
-}
-
-bool QQuickPointerTouchEvent::isUpdateEvent() const
-{
-    return touchPointStates() & (QEventPoint::State::Updated | QEventPoint::State::Stationary);
-}
-
-bool QQuickPointerTouchEvent::isReleaseEvent() const
-{
-    return touchPointStates() & QEventPoint::State::Released;
-}
-
-QVector<QPointF> QQuickPointerEvent::unacceptedPressedPointScenePositions() const
-{
-    QVector<QPointF> points;
-    for (int i = 0; i < pointCount(); ++i) {
-        if (!point(i)->isAccepted() && point(i)->state() == QQuickEventPoint::Pressed)
-            points << point(i)->scenePosition();
-    }
-    return points;
-}
-
-/*!
-    \internal
-    Populate the reusable synth-mouse event from one touchpoint.
-    It's required that isTouchEvent() be true when this is called.
-    If the touchpoint cannot be found, this returns nullptr.
-    Ownership of the event is NOT transferred to the caller.
-*/
-QMouseEvent *QQuickPointerTouchEvent::syntheticMouseEvent(int pointID, QQuickItem *relativeTo) const
-{
-    const QEventPoint *p = touchPointById(pointID);
-    if (!p)
-        return nullptr;
-    QEvent::Type type;
-    Qt::MouseButton buttons = Qt::LeftButton;
-    switch (p->state()) {
-    case QEventPoint::State::Pressed:
-        type = QEvent::MouseButtonPress;
-        break;
-    case QEventPoint::State::Updated:
-    case QEventPoint::State::Stationary:
-        type = QEvent::MouseMove;
-        break;
-    case QEventPoint::State::Released:
-        type = QEvent::MouseButtonRelease;
-        buttons = Qt::NoButton;
-        break;
-    default:
-        Q_ASSERT(false);
-        return nullptr;
-    }
-    m_synthMouseEvent = QMouseEvent(type, relativeTo->mapFromScene(p->scenePosition()),
-        p->scenePosition(), p->globalPosition(), Qt::LeftButton, buttons, m_event->modifiers(),
-        Qt::MouseEventSynthesizedByQt, device());
-    m_synthMouseEvent.setAccepted(true);
-    m_synthMouseEvent.setTimestamp(m_event->timestamp());
-    // ### Qt 6: try to always have valid velocity in every QEventPoint (either from the platform, or synthesized in QtGui).
-    // QQuickFlickablePrivate::handleMouseMoveEvent() checks for QInputDevice::Capability::Velocity
-    // and if it is set, then it does not need to do its own velocity calculations.
-    // But because m_synthMouseEvent gets the same device() where the (usually) touch event came from,
-    // the capability won't be set, in practice, until we have the velocity in place.
-    QMutableSinglePointEvent::from(m_synthMouseEvent).mutablePoint().setVelocity(p->velocity());
-    return &m_synthMouseEvent;
-}
-
-#if QT_CONFIG(tabletevent)
-QQuickPointerTabletEvent::QQuickPointerTabletEvent(QObject *parent, const QPointingDevice *device)
-    : QQuickSinglePointEvent(parent, device)
-{
-    m_point = new QQuickEventTabletPoint(this);
-}
-
-QQuickPointerEvent *QQuickPointerTabletEvent::reset(QEvent *event)
-{
-    auto ev = static_cast<QTabletEvent*>(event);
-    m_event = ev;
-    if (!event)
-        return this;
-
-    QQuickPointerHandlerPrivate::deviceDeliveryTargets(ev->device()).clear();
-    m_button = ev->button();
-    m_pressedButtons = ev->buttons();
-    static_cast<QQuickEventTabletPoint *>(m_point)->reset(ev);
-    return this;
-}
-
-QQuickEventTabletPoint::QQuickEventTabletPoint(QQuickPointerTabletEvent *parent)
-  : QQuickEventPoint(parent)
-{
-}
-
-void QQuickEventTabletPoint::reset(const QTabletEvent *ev)
-{
-    QEventPoint::State state = QEventPoint::State::Stationary;
-    switch (ev->type()) {
-    case QEvent::TabletPress:
-        state = QEventPoint::State::Pressed;
-        clearPassiveGrabbers();
-        break;
-    case QEvent::TabletRelease:
-        state = QEventPoint::State::Released;
-        break;
-    case QEvent::TabletMove:
-        state = QEventPoint::State::Updated;
-        break;
-    default:
-        break;
-    }
-    QQuickEventPoint::reset(state, ev->position(), 1, ev->timestamp());
-    m_rotation = ev->rotation();
-    m_pressure = ev->pressure();
-    m_tangentialPressure = ev->tangentialPressure();
-    m_tilt = QVector2D(ev->xTilt(), ev->yTilt());
-}
-
-bool QQuickPointerTabletEvent::isPressEvent() const
-{
-    auto me = static_cast<QTabletEvent *>(m_event);
-    return me->type() == QEvent::TabletPress;
-}
-
-bool QQuickPointerTabletEvent::isUpdateEvent() const
-{
-    auto me = static_cast<QTabletEvent *>(m_event);
-    return me->type() == QEvent::TabletMove;
-}
-
-bool QQuickPointerTabletEvent::isReleaseEvent() const
-{
-    auto me = static_cast<QTabletEvent *>(m_event);
-    return me->type() == QEvent::TabletRelease;
-}
-
-QTabletEvent *QQuickPointerTabletEvent::asTabletEvent() const
-{
-    return static_cast<QTabletEvent *>(m_event);
-}
-#endif // QT_CONFIG(tabletevent)
-
-#if QT_CONFIG(gestures)
-bool QQuickPointerNativeGestureEvent::isPressEvent() const
-{
-    return type() == Qt::BeginNativeGesture;
-}
-
-bool QQuickPointerNativeGestureEvent::isUpdateEvent() const
-{
-    switch (type()) {
-    case Qt::BeginNativeGesture:
-    case Qt::EndNativeGesture:
-        return false;
-    default:
-        return true;
-    }
-}
-
-bool QQuickPointerNativeGestureEvent::isReleaseEvent() const
-{
-    return type() == Qt::EndNativeGesture;
-}
-
-Qt::NativeGestureType QQuickPointerNativeGestureEvent::type() const
-{
-    return static_cast<QNativeGestureEvent *>(m_event)->gestureType();
-}
-
-qreal QQuickPointerNativeGestureEvent::value() const
-{
-    return static_cast<QNativeGestureEvent *>(m_event)->value();
-}
-#endif // QT_CONFIG(gestures)
-
-/*!
-    Returns whether the scroll event has Qt::ScrollBegin phase. On touchpads
-    which provide phase information, this is true when the fingers are placed
-    on the touchpad and scrolling begins. On other devices where this
-    information is not available, it remains false.
-*/
-bool QQuickPointerScrollEvent::isPressEvent() const
-{
-    return phase() == Qt::ScrollBegin;
-}
-
-/*!
-    Returns true when the scroll event has Qt::ScrollUpdate phase, or when the
-    phase is unknown. Some multi-touch-capable touchpads and trackpads provide
-    phase information; whereas ordinary mouse wheels and other types of
-    trackpads do not, and in such cases this is always true.
-*/
-bool QQuickPointerScrollEvent::isUpdateEvent() const
-{
-    return phase() == Qt::ScrollUpdate || phase() == Qt::NoScrollPhase;
-}
-
-/*!
-    Returns whether the scroll event has Qt::ScrollBegin phase. On touchpads
-    which provide phase information, this is true when the fingers are lifted
-    from the touchpad. On other devices where this information is not
-    available, it remains false.
-*/
-bool QQuickPointerScrollEvent::isReleaseEvent() const
-{
-    return phase() == Qt::ScrollEnd;
-}
-
-/*!
-    \internal
-    Returns a pointer to the QQuickEventPoint which has the \a pointId as
-    \l {QQuickEventPoint::pointId}{pointId}.
-    Returns nullptr if there is no point with that ID.
-
-    \fn QQuickPointerEvent::pointById(int pointId) const
-*/
-QQuickEventPoint *QQuickSinglePointEvent::pointById(int pointId) const
-{
-    if (m_point && pointId == m_point->pointId())
-        return m_point;
-    return nullptr;
-}
-
-QQuickEventPoint *QQuickPointerTouchEvent::pointById(int pointId) const
-{
-    auto it = std::find_if(m_touchPoints.constBegin(), m_touchPoints.constEnd(),
-        [pointId](const QQuickEventTouchPoint *tp) { return tp->pointId() == pointId; } );
-    if (it != m_touchPoints.constEnd())
-        return *it;
-    return nullptr;
-}
-
-/*!
-    \internal
-    Returns a pointer to the original TouchPoint which has the same
-    \l {QEventPoint::id}{id} as \a pointId, if the original event is a
-    QTouchEvent, and if that point is found. Otherwise, returns nullptr.
-*/
-const QEventPoint *QQuickPointerTouchEvent::touchPointById(int pointId) const
-{
-    const QTouchEvent *ev = asTouchEvent();
-    if (!ev)
-        return nullptr;
-    const QList<QEventPoint> &tps = ev->touchPoints();
-    auto it = std::find_if(tps.constBegin(), tps.constEnd(),
-        [pointId](QEventPoint const& tp) { return tp.id() == pointId; } );
-    // return the pointer to the actual TP in QTouchEvent::_touchPoints
-    return (it == tps.constEnd() ? nullptr : &*it);
-}
-
-/*!
-    \internal
-    Make a new QTouchEvent, giving it a subset of the original touch points.
-
-    Returns a nullptr if all points are stationary, or there are no points inside the item,
-    or none of the points were pressed inside and the item was not grabbing any of them
-    and isFiltering is false.  When isFiltering is true, it is assumed that the item
-    cares about all points which are inside its bounds, because most filtering items
-    need to monitor eventpoint movements until a drag threshold is exceeded or the
-    requirements for a gesture to be recognized are met in some other way.
-*/
-QTouchEvent *QQuickPointerTouchEvent::touchEventForItem(QQuickItem *item, bool isFiltering) const
-{
-    QList<QEventPoint> touchPoints;
-    QEventPoint::States eventStates; // TODO maybe avoid accumulating this, since the touchevent ctor doesn't need it
-    // TODO maybe add QQuickItem::mapVector2DFromScene(QVector2D) to avoid needing QQuickItemPrivate here
-    // Or else just document that velocity is always scene-relative and is not scaled and rotated with the item
-    // but that would require changing tst_qquickwindow::touchEvent_velocity(): it expects transformed velocity
-
-    bool anyPressOrReleaseInside = false;
-    bool anyStationaryWithModifiedPropertyInside = false;
-    bool anyGrabber = false;
-    QMatrix4x4 transformMatrix(QQuickItemPrivate::get(item)->windowToItemTransform());
-    for (int i = 0; i < m_pointCount; ++i) {
-        auto p = m_touchPoints.at(i);
-        if (p->isAccepted())
-            continue;
-        // include points where item is the grabber
-        bool isGrabber = p->exclusiveGrabber() == item;
-        if (isGrabber)
-            anyGrabber = true;
-        // include points inside the bounds if no other item is the grabber or if the item is filtering
-        bool isInside = item->contains(item->mapFromScene(p->scenePosition()));
-        bool hasAnotherGrabber = p->exclusiveGrabber() && p->exclusiveGrabber() != item;
-
-        // filtering: (childMouseEventFilter) include points that are grabbed by children of the target item
-        bool grabberIsChild = false;
-        auto parent = p->grabberItem();
-        while (isFiltering && parent) {
-            if (parent == item) {
-                grabberIsChild = true;
-                break;
-            }
-            parent = parent->parentItem();
-        }
-
-        bool filterRelevant = isFiltering && grabberIsChild;
-        if (!(isGrabber || (isInside && (!hasAnotherGrabber || isFiltering)) || filterRelevant))
-            continue;
-        if ((p->state() == QQuickEventPoint::Pressed || p->state() == QQuickEventPoint::Released) && isInside)
-            anyPressOrReleaseInside = true;
-        // we don't use QMutableEventPoint::from() because it's fine to have const here
-        const QMutableEventPoint *tp = static_cast<const QMutableEventPoint *>(touchPointById(p->pointId()));
-        if (tp) {
-            if (isInside && tp->stationaryWithModifiedProperty())
-                anyStationaryWithModifiedPropertyInside = true;
-            eventStates |= tp->state();
-            QMutableEventPoint tpCopy(*tp);
-            tpCopy.setPosition(item->mapFromScene(tp->scenePosition()));
-            tpCopy.setVelocity(transformMatrix.mapVector(tpCopy.velocity()).toVector2D());
-            touchPoints << tpCopy;
-        }
-    }
-
-    // Now touchPoints will have only points which are inside the item.
-    // But if none of them were just pressed inside, and the item has no other reason to care, ignore them anyway.
-    if ((eventStates == QEventPoint::State::Stationary && !anyStationaryWithModifiedPropertyInside) ||
-            touchPoints.isEmpty() || (!anyPressOrReleaseInside && !anyGrabber && !isFiltering))
-        return nullptr;
-
-    // if all points have the same state, set the event type accordingly
-    const QTouchEvent &event = *asTouchEvent();
-    QEvent::Type eventType = event.type();
-    switch (eventStates) {
-    case QEventPoint::State::Pressed:
-        eventType = QEvent::TouchBegin;
-        break;
-    case QEventPoint::State::Released:
-        eventType = QEvent::TouchEnd;
-        break;
-    default:
-        eventType = QEvent::TouchUpdate;
-        break;
-    }
-
-    QMutableTouchEvent *touchEvent = new QMutableTouchEvent(eventType, event.pointingDevice(),
-                                                            event.modifiers(), touchPoints);
-    touchEvent->setTarget(item);
-    touchEvent->setTimestamp(event.timestamp());
-    touchEvent->accept();
-    return touchEvent;
-}
-
-QTouchEvent *QQuickPointerTouchEvent::asTouchEvent() const
-{
-    return static_cast<QTouchEvent *>(m_event);
-}
-
-#ifndef QT_NO_DEBUG_STREAM
-
-Q_QUICK_PRIVATE_EXPORT QDebug operator<<(QDebug dbg, const QQuickPointerEvent *event)
-{
-    QDebugStateSaver saver(dbg);
-    dbg.nospace();
-    if (!event) {
-        dbg << "QQuickPointerEvent(0)";
-        return dbg;
-    }
-    dbg << "QQuickPointerEvent(";
-    dbg << event->timestamp();
-    if (event->device()) {
-        dbg << " dev:";
-        QtDebugUtils::formatQEnum(dbg, event->device()->type());
-        dbg << " " << event->device()->name();
-    } else {
-        dbg << " dev: null";
-    }
-    if (event->buttons() != Qt::NoButton) {
-        dbg << " buttons:";
-        QtDebugUtils::formatQEnum(dbg, event->buttons());
-    }
-    dbg << " [";
-    int c = event->pointCount();
-    for (int i = 0; i < c; ++i)
-        dbg << event->point(i) << ' ';
-    dbg << "])";
-    return dbg;
-}
-
-Q_QUICK_PRIVATE_EXPORT QDebug operator<<(QDebug dbg, const QQuickEventPoint *event)
-{
-    QDebugStateSaver saver(dbg);
-    dbg.nospace();
-    if (!event) {
-        dbg << "QQuickEventPoint(0)";
-        return dbg;
-    }
-    dbg << "QQuickEventPoint(accepted:" << event->isAccepted()
-        << " state:";
-    QtDebugUtils::formatQEnum(dbg, event->state());
-    dbg << " scenePos:" << event->scenePosition() << " id:" << Qt::hex << event->pointId() << Qt::dec
-        << " timeHeld:" << event->timeHeld() << ')';
-    return dbg;
-}
-
-#endif
-
 QT_END_NAMESPACE