File indexing completed on 2024-04-28 05:52:37

 /*
     This file is part of the Okteta Gui library, made within the KDE community.
 
     SPDX-FileCopyrightText: 2021 Friedrich W. H. Kossebau <kossebau@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "touchonlytapandholdgesturerecognizer.hpp"
 
 // lib
 #include "touchonlytapandholdgesture.hpp"
 // Qt
 #include <QWidget>
 #include <QTouchEvent>
 
 namespace Okteta {
 
 constexpr int tapRadius = 40; // value used by Qt's tap gestures
 
 TouchOnlyTapAndHoldGestureRecognizer::TouchOnlyTapAndHoldGestureRecognizer() = default;
 
 QGesture *TouchOnlyTapAndHoldGestureRecognizer::create(QObject* target)
 {
     Q_UNUSED(target);
 
     return new TouchOnlyTapAndHoldGesture;
 }
 
 QGestureRecognizer::Result TouchOnlyTapAndHoldGestureRecognizer::recognize(QGesture* state, QObject* object,
                                                                            QEvent* event)
 {
     auto* tapAndHoldGesture = static_cast<TouchOnlyTapAndHoldGesture *>(state);
 
     if ((object == state) && (event->type() == QEvent::Timer)) {
         tapAndHoldGesture->cancelHoldTimer();
         return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
     }
 
     switch (event->type()) {
     case QEvent::TouchBegin: {
         const auto* touchEvent = static_cast<const QTouchEvent*>(event);
         const QTouchEvent::TouchPoint touchPoint = touchEvent->touchPoints().at(0);
         const QPointF screenPosition = touchPoint.screenPos();
         const QPointF widgetPosition = touchPoint.pos();
         tapAndHoldGesture->setHotSpot(screenPosition);
         tapAndHoldGesture->setPosition(widgetPosition);
         tapAndHoldGesture->beginHoldTimeer();
         return QGestureRecognizer::MayBeGesture;
     }
     case QEvent::TouchUpdate: {
         if (tapAndHoldGesture->isHoldTimerActive()) {
             const auto* touchEvent = static_cast<const QTouchEvent*>(event);
             if (touchEvent->touchPoints().size() == 1) {
                 const QTouchEvent::TouchPoint touchPoint = touchEvent->touchPoints().at(0);
                 const QPoint delta = touchPoint.pos().toPoint() - touchPoint.startPos().toPoint();
                 if (delta.manhattanLength() <= tapRadius) {
                     return QGestureRecognizer::MayBeGesture;
                 }
             }
         }
         return QGestureRecognizer::CancelGesture;
     }
     case QEvent::TouchEnd:
         return QGestureRecognizer::CancelGesture;
     default:
         return QGestureRecognizer::Ignore;
     }
 }
 
 void TouchOnlyTapAndHoldGestureRecognizer::reset(QGesture* state)
 {
     auto* tapAndHoldGesture = static_cast<TouchOnlyTapAndHoldGesture*>(state);
     tapAndHoldGesture->reset();
 
     QGestureRecognizer::reset(state);
 }
 
 }