146 lines
4.2 KiB
C++
146 lines
4.2 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2017 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "gestures.h"
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#include <QSizeF>
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#include <functional>
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namespace KWin
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{
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Gesture::Gesture(QObject *parent)
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: QObject(parent)
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{
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}
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Gesture::~Gesture() = default;
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SwipeGesture::SwipeGesture(QObject *parent)
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: Gesture(parent)
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{
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}
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SwipeGesture::~SwipeGesture() = default;
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GestureRecognizer::GestureRecognizer(QObject *parent)
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: QObject(parent)
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{
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}
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GestureRecognizer::~GestureRecognizer() = default;
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void GestureRecognizer::registerGesture(KWin::Gesture* gesture)
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{
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Q_ASSERT(!m_gestures.contains(gesture));
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auto connection = connect(gesture, &QObject::destroyed, this, std::bind(&GestureRecognizer::unregisterGesture, this, gesture));
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m_destroyConnections.insert(gesture, connection);
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m_gestures << gesture;
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}
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void GestureRecognizer::unregisterGesture(KWin::Gesture* gesture)
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{
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auto it = m_destroyConnections.find(gesture);
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if (it != m_destroyConnections.end()) {
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disconnect(it.value());
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m_destroyConnections.erase(it);
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}
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m_gestures.removeAll(gesture);
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if (m_activeSwipeGestures.removeOne(gesture)) {
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emit gesture->cancelled();
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}
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}
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void GestureRecognizer::startSwipeGesture(uint fingerCount)
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{
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// TODO: verify that no gesture is running
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for (Gesture *gesture : qAsConst(m_gestures)) {
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SwipeGesture *swipeGesture = qobject_cast<SwipeGesture*>(gesture);
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if (!gesture) {
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continue;
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}
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if (swipeGesture->minimumFingerCountIsRelevant()) {
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if (swipeGesture->minimumFingerCount() > fingerCount) {
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continue;
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}
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}
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if (swipeGesture->maximumFingerCountIsRelevant()) {
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if (swipeGesture->maximumFingerCount() < fingerCount) {
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continue;
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}
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}
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// direction doesn't matter yet
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m_activeSwipeGestures << swipeGesture;
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emit swipeGesture->started();
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}
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}
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void GestureRecognizer::updateSwipeGesture(const QSizeF &delta)
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{
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m_swipeUpdates << delta;
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// determine the direction of the swipe
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if (delta.width() == delta.height()) {
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// special case of diagonal, this is not yet supported, thus cancel all gestures
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cancelActiveSwipeGestures();
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return;
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}
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SwipeGesture::Direction direction;
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if (std::abs(delta.width()) > std::abs(delta.height())) {
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// horizontal
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direction = delta.width() < 0 ? SwipeGesture::Direction::Left : SwipeGesture::Direction::Right;
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} else {
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// vertical
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direction = delta.height() < 0 ? SwipeGesture::Direction::Up : SwipeGesture::Direction::Down;
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}
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for (auto it = m_activeSwipeGestures.begin(); it != m_activeSwipeGestures.end();) {
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auto g = qobject_cast<SwipeGesture*>(*it);
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if (g->direction() == direction) {
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it++;
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} else {
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emit g->cancelled();
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it = m_activeSwipeGestures.erase(it);
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}
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}
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}
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void GestureRecognizer::cancelActiveSwipeGestures()
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{
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for (auto g : qAsConst(m_activeSwipeGestures)) {
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emit g->cancelled();
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}
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m_activeSwipeGestures.clear();
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}
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void GestureRecognizer::cancelSwipeGesture()
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{
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cancelActiveSwipeGestures();
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m_swipeUpdates.clear();
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}
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void GestureRecognizer::endSwipeGesture()
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{
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for (auto g : qAsConst(m_activeSwipeGestures)) {
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emit g->triggered();
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}
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m_activeSwipeGestures.clear();
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m_swipeUpdates.clear();
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}
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}
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