1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* SPDX-FileCopyrightText: 2020 Steffen Hartleib <[email protected]>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
// Self
#include "ktwofingerswipe.h"
// Qt
#include <QTouchEvent>
#include <QLineF>
KTwoFingerSwipeRecognizer::KTwoFingerSwipeRecognizer() :
QGestureRecognizer(),
m_touchBeginnTimestamp(0),
m_gestureAlreadyTriggered(false)
{
}
KTwoFingerSwipeRecognizer::~KTwoFingerSwipeRecognizer()
{
}
QGesture* KTwoFingerSwipeRecognizer::create(QObject*)
{
return static_cast<QGesture*>(new KTwoFingerSwipe());
}
QGestureRecognizer::Result KTwoFingerSwipeRecognizer::recognize(QGesture* gesture, QObject* watched, QEvent* event)
{
Q_UNUSED(watched)
KTwoFingerSwipe* const kTwoFingerSwipe = static_cast<KTwoFingerSwipe*>(gesture);
const QTouchEvent* touchEvent = static_cast<const QTouchEvent*>(event);
const int maxTimeFrameForSwipe = 90;
const int minDistanceForSwipe = 30;
switch (event->type()) {
case QEvent::TouchBegin: {
m_touchBeginnTimestamp = touchEvent->timestamp();
m_gestureAlreadyTriggered = false;
kTwoFingerSwipe->setHotSpot(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerSwipe->setPos(touchEvent->touchPoints().first().startPos());
kTwoFingerSwipe->setScreenPos(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerSwipe->setScenePos(touchEvent->touchPoints().first().startScenePos());
return MayBeGesture;
}
case QEvent::TouchUpdate: {
const qint64 now = touchEvent->timestamp();
const qint64 elapsedTime = now - m_touchBeginnTimestamp;
const QPointF distance = touchEvent->touchPoints().first().startPos() - touchEvent->touchPoints().first().pos();
kTwoFingerSwipe->setHotSpot(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerSwipe->setPos(touchEvent->touchPoints().first().startPos());
kTwoFingerSwipe->setScreenPos(touchEvent->touchPoints().first().startScreenPos());
kTwoFingerSwipe->setScenePos(touchEvent->touchPoints().first().startScenePos());
const QLineF ql = QLineF(touchEvent->touchPoints().first().startPos(), touchEvent->touchPoints().first().pos());
kTwoFingerSwipe->setSwipeAngle(ql.angle());
if (touchEvent->touchPoints().size() > 2) {
return CancelGesture;
}
if (touchEvent->touchPoints().size() == 2) {
if ((elapsedTime) > maxTimeFrameForSwipe) {
return CancelGesture;
}
if (distance.manhattanLength() >= minDistanceForSwipe &&
(elapsedTime) <= maxTimeFrameForSwipe && !m_gestureAlreadyTriggered) {
m_gestureAlreadyTriggered = true;
return FinishGesture;
} else if ((elapsedTime) <= maxTimeFrameForSwipe && !m_gestureAlreadyTriggered) {
return TriggerGesture;
}
}
break;
}
default:
return Ignore;
}
return Ignore;
}
KTwoFingerSwipe::KTwoFingerSwipe(QObject* parent) :
QGesture(parent),
m_pos(QPointF(-1, -1)),
m_screenPos(QPointF(-1, -1)),
m_scenePos(QPointF(-1, -1)),
m_swipeAngle(0.0)
{
}
KTwoFingerSwipe::~KTwoFingerSwipe()
{
}
QPointF KTwoFingerSwipe::pos() const
{
return m_pos;
}
void KTwoFingerSwipe::setPos(QPointF _pos)
{
m_pos = _pos;
}
QPointF KTwoFingerSwipe::screenPos() const
{
return m_screenPos;
}
void KTwoFingerSwipe::setScreenPos(QPointF _screenPos)
{
m_screenPos = _screenPos;
}
QPointF KTwoFingerSwipe::scenePos() const
{
return m_scenePos;
}
void KTwoFingerSwipe::setScenePos(QPointF _scenePos)
{
m_scenePos = _scenePos;
}
qreal KTwoFingerSwipe::swipeAngle() const
{
return m_swipeAngle;
}
void KTwoFingerSwipe::setSwipeAngle(qreal _swipeAngle)
{
m_swipeAngle = _swipeAngle;
}
|
