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QSinglePointEvent: port away from QMutableEventPoint::from()

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Use the new static QMutableEventPoint setters, which do not depend on
undefined behavior.

Made it a separate commit, because, while straight-forward, it's a lot
of changes compared to other users.

Task-number: QTBUG-99615
Pick-to: 6.3
Change-Id: I580b6b225421a1e908f04c8e30adcdef6540ea52
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
This commit is contained in:
Marc Mutz 2022-01-06 22:52:43 +01:00
parent b17c4d0e2e
commit 716c916c40
1 changed files with 16 additions and 16 deletions
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32
src/gui/kernel/qevent.cpp
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@ -550,30 +550,30 @@ QSinglePointEvent::QSinglePointEvent(QEvent::Type type, const QPointingDevice *d
bool isWheel = (type == QEvent::Type::Wheel);
auto devPriv = QPointingDevicePrivate::get(const_cast<QPointingDevice *>(pointingDevice()));
auto epd = devPriv->pointById(0);
QMutableEventPoint &mut = QMutableEventPoint::from(epd->eventPoint);
Q_ASSERT(mut.device() == dev);
// mut is now a reference to a non-detached instance that lives in QPointingDevicePrivate::activePoints.
QEventPoint &p = epd->eventPoint;
Q_ASSERT(p.device() == dev);
// p is a reference to a non-detached instance that lives in QPointingDevicePrivate::activePoints.
// Update persistent info in that instance.
if (isPress || isWheel)
mut.setGlobalLastPosition(globalPos);
QMutableEventPoint::setGlobalLastPosition(p, globalPos);
else
mut.setGlobalLastPosition(mut.globalPosition());
mut.setGlobalPosition(globalPos);
if (isWheel && mut.state() != QEventPoint::State::Updated)
mut.setGlobalPressPosition(globalPos);
QMutableEventPoint::setGlobalLastPosition(p, p.globalPosition());
QMutableEventPoint::setGlobalPosition(p, globalPos);
if (isWheel && p.state() != QEventPoint::State::Updated)
QMutableEventPoint::setGlobalPressPosition(p, globalPos);
if (type == MouseButtonDblClick)
mut.setState(QEventPoint::State::Stationary);
QMutableEventPoint::setState(p, QEventPoint::State::Stationary);
else if (button == Qt::NoButton || isWheel)
mut.setState(QEventPoint::State::Updated);
QMutableEventPoint::setState(p, QEventPoint::State::Updated);
else if (isPress)
mut.setState(QEventPoint::State::Pressed);
QMutableEventPoint::setState(p, QEventPoint::State::Pressed);
else
mut.setState(QEventPoint::State::Released);
mut.setScenePosition(scenePos);
QMutableEventPoint::setState(p, QEventPoint::State::Released);
QMutableEventPoint::setScenePosition(p, scenePos);
// Now detach, and update the detached instance with ephemeral state.
mut.detach();
mut.setPosition(localPos);
m_points.append(mut);
QMutableEventPoint::detach(p);
QMutableEventPoint::setPosition(p, localPos);
m_points.append(p);
}
/*! \internal