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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBrowser project.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPLv2 included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "touchtracker.h"
#include "appengine.h"
#include <QDateTime>
using namespace utils;
TouchTracker::TouchTracker(QQuickItem *parent)
: QQuickItem(parent)
, m_blockEvents(false)
, m_diff(0)
, m_previousY(0)
, m_target(0)
, m_delegate(0)
{
m_startPoint.ts = 0;
m_currentPoint.ts = 0;
}
QQuickItem *TouchTracker::target() const
{
return m_target;
}
void TouchTracker::setTarget(QQuickItem * target)
{
m_target = target;
emit targetChanged();
}
int TouchTracker::xVelocity() const
{
qreal pos = qAbs(m_startPoint.x() - m_currentPoint.x());
qreal time = qAbs(m_startPoint.ts - m_currentPoint.ts);
return pos / time * 1000;
}
int TouchTracker::yVelocity() const
{
qreal pos = qAbs(m_startPoint.y() - m_currentPoint.y());
qreal time = qAbs(m_startPoint.ts - m_currentPoint.ts);
return pos / time * 1000;
}
qreal TouchTracker::touchX() const
{
return m_currentPoint.x();
}
qreal TouchTracker::touchY() const
{
return m_currentPoint.y();
}
bool TouchTracker::blockEvents() const
{
return m_blockEvents;
}
void TouchTracker::setBlockEvents(bool shouldBlock)
{
if (m_blockEvents == shouldBlock)
return;
m_blockEvents = shouldBlock;
emit blockEventsChanged();
}
bool TouchTracker::eventFilter(QObject *obj, QEvent *event)
{
if (obj != m_delegate)
return QQuickItem::eventFilter(obj, event);
if (event->type() == QEvent::Wheel)
return m_blockEvents;
if (!isTouchEvent(event))
return QQuickItem::eventFilter(obj, event);
const QTouchEvent *touch = static_cast<QTouchEvent*>(event);
const QList<QTouchEvent::TouchPoint> &points = touch->touchPoints();
m_previousY = m_currentPoint.y();
m_currentPoint.pos = m_target->mapToScene(points.at(0).pos());
m_currentPoint.ts = QDateTime::currentMSecsSinceEpoch();
int currentDiff = m_previousY - m_currentPoint.y();
if ((currentDiff > 0 && m_diff < 0) || (currentDiff < 0 && m_diff > 0))
emit scrollDirectionChanged();
m_diff = currentDiff;
emit touchChanged();
emit velocityChanged();
if (event->type() == QEvent::TouchEnd)
emit touchEnd();
return m_blockEvents;
}
void TouchTracker::touchEvent(QTouchEvent * event)
{
if (!m_target) {
if (!m_blockEvents)
QQuickItem::touchEvent(event);
return;
}
event->setAccepted(false);
const QList<QTouchEvent::TouchPoint> &points = event->touchPoints();
m_currentPoint.pos = m_target->mapToScene(points.at(0).pos());
m_currentPoint.ts = QDateTime::currentMSecsSinceEpoch();
if (event->type() == QEvent::TouchBegin) {
m_startPoint = m_currentPoint;
emit touchBegin();
}
emit touchChanged();
// We have to find the delegate to be able to filter
// events from the WebEngineView.
// This is a hack and should preferably be made easier
// with the API in some way.
QQuickItem *child = m_target->childAt(m_currentPoint.x(), m_currentPoint.y());
if (child && m_delegate != child) {
child->installEventFilter(this);
m_delegate = child;
}
}
|
