File indexing completed on 2024-05-19 15:09:23

 /*
     SPDX-FileCopyrightText: 2019 Marco Martin <mart@kde.org>
     SPDX-FileCopyrightText: 2014-2015 Eike Hein <hein@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "fallbacktaphandler.h"
 
 #include <QGuiApplication>
 #include <QStyleHints>
 
 FallbackTapHandlerMouseEvent::FallbackTapHandlerMouseEvent(Qt::MouseButton button, Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers, qreal x, qreal y)
     : QObject(nullptr)
     , m_button(button)
     , m_buttons(buttons)
     , m_modifiers(modifiers)
     , m_x(x)
     , m_y(y)
 {
 }
 
 FallbackTapHandler::FallbackTapHandler(QQuickItem *parent)
     : QQuickItem(parent)
 {
     setFiltersChildMouseEvents(true);
     setAcceptedMouseButtons(Qt::LeftButton);
 }
 
 FallbackTapHandler::~FallbackTapHandler()
 {
 }
 
 void FallbackTapHandler::setAcceptedButtons(Qt::MouseButtons buttons)
 {
     setAcceptedMouseButtons(buttons);
     Q_EMIT acceptedButtonsChanged();
 }
 
 bool FallbackTapHandler::childMouseEventFilter(QQuickItem *item, QEvent *event)
 {
     if (event->type() == QEvent::MouseButtonPress && item->inherits("QQuickFlickable")) {
         QMouseEvent *me = static_cast<QMouseEvent *>(event);
         if (!(me->button() & acceptedMouseButtons()) && !(me->buttons() & acceptedMouseButtons())) {
             return QQuickItem::childMouseEventFilter(item, event);
         }
         m_mouseDownItem = item;
         m_mouseDownPos = me->windowPos();
 
         QPointF mappedPoint = mapFromItem(item, me->pos());
         FallbackTapHandlerMouseEvent eventProxy(me->button(), me->buttons(), me->modifiers(), mappedPoint.x(), mappedPoint.y());
         Q_EMIT pressed(&eventProxy);
 
     } else if (event->type() == QEvent::MouseButtonRelease && item->inherits("QQuickFlickable")) {
         QMouseEvent *me = static_cast<QMouseEvent *>(event);
 
         if ((!(me->button() & acceptedMouseButtons()) && !(me->buttons() & acceptedMouseButtons())) || m_mouseDownItem != item) {
             return QQuickItem::childMouseEventFilter(item, event);
         }
 
         QPointF mappedPoint = mapFromItem(item, me->pos());
         FallbackTapHandlerMouseEvent eventProxy(me->button(), me->buttons(), me->modifiers(), mappedPoint.x(), mappedPoint.y());
         Q_EMIT released(&eventProxy);
 
         if (QPointF(m_mouseDownPos - me->windowPos()).manhattanLength() < QGuiApplication::styleHints()->startDragDistance()) {
             Q_EMIT tapped(&eventProxy);
         }
 
         m_mouseDownItem.clear();
         m_mouseDownPos = QPointF();
     }
 
     return QQuickItem::childMouseEventFilter(item, event);
 }
 
 void FallbackTapHandler::mousePressEvent(QMouseEvent *event)
 {
     if (!(event->button() & acceptedMouseButtons()) && !(event->buttons() & acceptedMouseButtons())) {
         event->ignore();
         return;
     }
 
     event->accept();
     m_mouseDownItem = this;
     m_mouseDownPos = event->windowPos();
 
     FallbackTapHandlerMouseEvent eventProxy(event->button(), event->buttons(), event->modifiers(), event->x(), event->y());
     Q_EMIT pressed(&eventProxy);
 }
 
 void FallbackTapHandler::mouseReleaseEvent(QMouseEvent *event)
 {
     if (!(event->button() & acceptedMouseButtons()) && !(event->buttons() & acceptedMouseButtons())) {
         event->ignore();
         return;
     }
 
     FallbackTapHandlerMouseEvent eventProxy(event->button(), event->buttons(), event->modifiers(), event->x(), event->y());
 
     if (QPointF(m_mouseDownPos - event->windowPos()).manhattanLength() < QGuiApplication::styleHints()->startDragDistance()) {
         Q_EMIT tapped(&eventProxy);
     }
 
     m_mouseDownItem.clear();
     m_mouseDownPos = QPointF();
 
     Q_EMIT released(&eventProxy);
 }
 
 #include "moc_fallbacktaphandler.cpp"