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/*
* SPDX-FileCopyrightText: 2020 Steffen Hartleib <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
// Self
#include "ktwofingertap.h"
// Qt
#include <QTouchEvent>
#include <QApplication>
#include <QGraphicsWidget>
KTwoFingerTapRecognizer::KTwoFingerTapRecognizer() :
QGestureRecognizer(),
m_gestureTriggered(false)
{
}
KTwoFingerTapRecognizer::~KTwoFingerTapRecognizer()
{
}
QGesture* KTwoFingerTapRecognizer::create(QObject*)
{
return static_cast<QGesture*>(new KTwoFingerTap());
}
QGestureRecognizer::Result KTwoFingerTapRecognizer::recognize(QGesture* gesture, QObject* watched, QEvent* event)
{
if (qobject_cast<QGraphicsWidget*>(watched)) {
return Ignore;
}
KTwoFingerTap* const kTwoFingerTap = static_cast<KTwoFingerTap*>(gesture);
const QTouchEvent* touchEvent = static_cast<const QTouchEvent*>(event);
switch (event->type()) {
case QEvent::TouchBegin: {
kTwoFingerTap->setHotSpot(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerTap->setPos(touchEvent->touchPoints().first().startPos());
kTwoFingerTap->setScreenPos(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerTap->setScenePos(touchEvent->touchPoints().first().startScenePos());
m_gestureTriggered = false;
return MayBeGesture;
}
case QEvent::TouchUpdate: {
if (touchEvent->touchPoints().size() > 2) {
m_gestureTriggered = false;
return CancelGesture;
}
if (touchEvent->touchPoints().size() == 2) {
if ((touchEvent->touchPoints().first().startPos() - touchEvent->touchPoints().first().pos()).manhattanLength() >= QApplication::startDragDistance()) {
m_gestureTriggered = false;
return CancelGesture;
}
if ((touchEvent->touchPoints().at(1).startPos() - touchEvent->touchPoints().at(1).pos()).manhattanLength() >= QApplication::startDragDistance()) {
m_gestureTriggered = false;
return CancelGesture;
}
if (touchEvent->touchPointStates() & Qt::TouchPointPressed) {
m_gestureTriggered = true;
}
if (touchEvent->touchPointStates() & Qt::TouchPointReleased && m_gestureTriggered) {
m_gestureTriggered = false;
return FinishGesture;
}
}
break;
}
default:
return Ignore;
}
return Ignore;
}
KTwoFingerTap::KTwoFingerTap(QObject* parent) :
QGesture(parent),
m_pos(QPointF(-1, -1)),
m_screenPos(QPointF(-1, -1)),
m_scenePos(QPointF(-1, -1))
{
}
KTwoFingerTap::~KTwoFingerTap()
{
}
QPointF KTwoFingerTap::pos() const
{
return m_pos;
}
void KTwoFingerTap::setPos(QPointF _pos)
{
m_pos = _pos;
}
QPointF KTwoFingerTap::screenPos() const
{
return m_screenPos;
}
void KTwoFingerTap::setScreenPos(QPointF _screenPos)
{
m_screenPos = _screenPos;
}
QPointF KTwoFingerTap::scenePos() const
{
return m_scenePos;
}
void KTwoFingerTap::setScenePos(QPointF _scenePos)
{
m_scenePos = _scenePos;
}
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