qquickpointhandler.cpp

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// Copyright (C) 2017 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 "qquickpointhandler_p.h"
#include <private/qquickwindow_p.h>
 
#include <QDebug>
#include <QtCore/qpointer.h>
 
QT_BEGIN_NAMESPACE
 
QQuickPointHandler::QQuickPointHandler(QQuickItem *parent)
    : QQuickSinglePointHandler(parent)
{
    setIgnoreAdditionalPoints();
}
 
bool QQuickPointHandler::wantsEventPoint(const QPointerEvent *event, const QEventPoint &point)
{
    // On press, we want it unless a sibling of the same type also does.
    if (point.state() == QEventPoint::Pressed && QQuickSinglePointHandler::wantsEventPoint(event, point)) {
        for (const QObject *grabber : event->passiveGrabbers(point)) {
            if (grabber && grabber->parent() == parent() &&
                    grabber->metaObject()->className() == metaObject()->className())
                return false;
        }
        return true;
    }
    // If we've already been interested in a point, stay interested, even if it has strayed outside bounds.
    return (point.state() != QEventPoint::Pressed &&
            QQuickSinglePointHandler::point().id() == point.id());
}
 
void QQuickPointHandler::handleEventPoint(QPointerEvent *event, QEventPoint &point)
{
    switch (point.state()) {
    case QEventPoint::Pressed:
        if (QQuickDeliveryAgentPrivate::isTouchEvent(event) ||
                (static_cast<const QSinglePointEvent *>(event)->buttons() & acceptedButtons()) != Qt::NoButton) {
            setPassiveGrab(event, point);
            setActive(true);
        }
        break;
    case QEventPoint::Released:
        if (QQuickDeliveryAgentPrivate::isTouchEvent(event) ||
                (static_cast<const QSinglePointEvent *>(event)->buttons() & acceptedButtons()) == Qt::NoButton)
            setActive(false);
        break;
    default:
        break;
    }
    point.setAccepted(false); // Just lurking... don't interfere with propagation
    emit translationChanged();
    QQuickSinglePointHandler::handleEventPoint(event, point);
}
 
QVector2D QQuickPointHandler::translation() const
{
    return QVector2D(point().position() - point().pressPosition());
}
 
QT_END_NAMESPACE
 
#include "moc_qquickpointhandler_p.cpp"