File indexing completed on 2024-12-01 11:10:42
0001 /* 0002 SPDX-FileCopyrightText: 2020 Michail Vourlakos <mvourlakos@gmail.com> 0003 SPDX-License-Identifier: GPL-2.0-or-later 0004 */ 0005 0006 #include "parabolic.h" 0007 0008 // local 0009 #include "view.h" 0010 0011 // Qt 0012 #include <QMetaObject> 0013 0014 namespace Latte { 0015 namespace ViewPart { 0016 0017 Parabolic::Parabolic(Latte::View *parent) 0018 : QObject(parent), 0019 m_view(parent) 0020 { 0021 //! Parabolic Item Nullifier does not need any big interval in order to avoid 0022 //! nullifing currentParabolicItem too fast and as such send a false signal 0023 //! that NO parabolic item is hovered currently 0024 m_parabolicItemNullifier.setInterval(1); 0025 m_parabolicItemNullifier.setSingleShot(true); 0026 connect(&m_parabolicItemNullifier, &QTimer::timeout, this, [&]() { 0027 setCurrentParabolicItem(nullptr); 0028 }); 0029 0030 connect(this, &Parabolic::currentParabolicItemChanged, this, &Parabolic::onCurrentParabolicItemChanged); 0031 0032 connect(m_view, &View::eventTriggered, this, &Parabolic::onEvent); 0033 } 0034 0035 Parabolic::~Parabolic() 0036 { 0037 } 0038 0039 QQuickItem *Parabolic::currentParabolicItem() const 0040 { 0041 return m_currentParabolicItem; 0042 } 0043 0044 void Parabolic::setCurrentParabolicItem(QQuickItem *item) 0045 { 0046 if (m_currentParabolicItem == item) { 0047 return; 0048 } 0049 0050 if (m_currentParabolicItem) { 0051 QMetaObject::invokeMethod(m_currentParabolicItem, "parabolicExited", Qt::QueuedConnection); 0052 } 0053 0054 m_currentParabolicItem = item; 0055 emit currentParabolicItemChanged(); 0056 } 0057 0058 void Parabolic::onEvent(QEvent *e) 0059 { 0060 if (!e) { 0061 return; 0062 } 0063 0064 switch (e->type()) { 0065 0066 case QEvent::Leave: 0067 setCurrentParabolicItem(nullptr); 0068 break; 0069 case QEvent::MouseMove: 0070 if (auto me = dynamic_cast<QMouseEvent *>(e)) { 0071 if (m_currentParabolicItem) { 0072 QPointF internal = m_currentParabolicItem->mapFromScene(me->windowPos()); 0073 0074 if (m_currentParabolicItem->contains(internal)) { 0075 m_parabolicItemNullifier.stop(); 0076 //! sending move event to parabolic item 0077 QMetaObject::invokeMethod(m_currentParabolicItem, 0078 "parabolicMove", 0079 Qt::QueuedConnection, 0080 Q_ARG(qreal, internal.x()), 0081 Q_ARG(qreal, internal.y())); 0082 } else { 0083 m_lastOrphanParabolicMove = me->windowPos(); 0084 //! clearing parabolic item 0085 m_parabolicItemNullifier.start(); 0086 } 0087 } else { 0088 m_lastOrphanParabolicMove = me->windowPos(); 0089 } 0090 } 0091 default: 0092 break; 0093 } 0094 0095 } 0096 0097 void Parabolic::onCurrentParabolicItemChanged() 0098 { 0099 m_parabolicItemNullifier.stop(); 0100 0101 if (m_currentParabolicItem) { 0102 QPointF internal = m_currentParabolicItem->mapFromScene(m_lastOrphanParabolicMove); 0103 0104 if (m_currentParabolicItem->contains(internal)) { 0105 //! sending enter event to parabolic item 0106 QMetaObject::invokeMethod(m_currentParabolicItem, 0107 "parabolicEntered", 0108 Qt::QueuedConnection, 0109 Q_ARG(qreal, internal.x()), 0110 Q_ARG(qreal, internal.y())); 0111 } 0112 } 0113 } 0114 0115 } 0116 } 0117