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qquickmultipointhandler.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtQuick module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
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15** information use the contact form at https://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 3 as published by the Free Software-
20** Foundation and appearing in the file LICENSE.LGPL3 included in the-
21** packaging of this file. Please review the following information to-
22** ensure the GNU Lesser General Public License version 3 requirements-
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.-
24**-
25** GNU General Public License Usage-
26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
28** Public license version 3 or any later version approved by the KDE Free-
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31** included in the packaging of this file. Please review the following-
32** information to ensure the GNU General Public License requirements will-
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34** https://www.gnu.org/licenses/gpl-3.0.html.-
35**-
36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39-
40#include "qquickmultipointhandler_p.h"-
41#include <private/qquickitem_p.h>-
42#include <QLineF>-
43#include <QMouseEvent>-
44#include <QDebug>-
45-
46QT_BEGIN_NAMESPACE-
47-
48/*!-
49 \qmltype MultiPointHandler-
50 \since 5.10-
51 \preliminary-
52 \instantiates QQuickMultiPointHandler-
53 \inherits PointerDeviceHandler-
54 \inqmlmodule Qt.labs.handlers-
55 \ingroup qtquick-handlers-
56 \brief Abstract handler for multi-point Pointer Events.-
57-
58 An intermediate class (not registered as a QML type)-
59 for any type of handler which requires and acts upon a specific number-
60 of multiple touchpoints.-
61*/-
62QQuickMultiPointHandler::QQuickMultiPointHandler(QObject *parent, int minimumPointCount)-
63 : QQuickPointerDeviceHandler(parent)-
64 , m_minimumPointCount(minimumPointCount)-
65 , m_maximumPointCount(-1)-
66{-
67}
executed 4 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
4
68-
69QQuickMultiPointHandler::~QQuickMultiPointHandler()-
70{-
71}-
72-
73bool QQuickMultiPointHandler::wantsPointerEvent(QQuickPointerEvent *event)-
74{-
75 if (!QQuickPointerDeviceHandler::wantsPointerEvent(event))
!QQuickPointer...erEvent(event)Description
TRUEnever evaluated
FALSEevaluated 83 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
0-83
76 return false;
never executed: return false;
0
77-
78#if QT_CONFIG(gestures)-
79 if (event->asPointerNativeGestureEvent())
event->asPoint...GestureEvent()Description
TRUEnever evaluated
FALSEevaluated 83 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
0-83
80 return true;
never executed: return true;
0
81#endif-
82-
83 if (hasCurrentPoints(event))
hasCurrentPoints(event)Description
TRUEevaluated 27 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 56 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
27-56
84 return true;
executed 27 times by 1 test: return true;
Executed by:
  • tst_multipointtoucharea_interop
27
85-
86 const QVector<QQuickEventPoint *> candidatePoints = eligiblePoints(event);-
87 const bool ret = (candidatePoints.size() >= minimumPointCount() && candidatePoints.size() <= maximumPointCount());
candidatePoint...umPointCount()Description
TRUEevaluated 6 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 50 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
candidatePoint...umPointCount()Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 2 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
2-50
88 if (ret)
retDescription
TRUEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 52 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
4-52
89 m_currentPoints = candidatePoints;
executed 4 times by 1 test: m_currentPoints = candidatePoints;
Executed by:
  • tst_multipointtoucharea_interop
4
90 return ret;
executed 56 times by 1 test: return ret;
Executed by:
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56
91}-
92-
93void QQuickMultiPointHandler::handlePointerEventImpl(QQuickPointerEvent *event)-
94{-
95 QQuickPointerHandler::handlePointerEventImpl(event);-
96 m_centroid.reset(m_currentPoints);-
97 emit centroidChanged();-
98}
executed 31 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
31
99-
100void QQuickMultiPointHandler::onActiveChanged()-
101{-
102 if (active()) {
active()Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 4 times by 1 test
Evaluated by:
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4
103 m_centroid.m_sceneGrabPosition = m_centroid.m_scenePosition;-
104 }
executed 4 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
4
105}
executed 8 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
8
106-
107QVector<QQuickEventPoint *> QQuickMultiPointHandler::eligiblePoints(QQuickPointerEvent *event)-
108{-
109 QVector<QQuickEventPoint *> ret;-
110 int c = event->pointCount();-
111 // If one or more points are newly pressed or released, all non-released points are candidates for this handler.-
112 // In other cases however, do not steal the grab: that is, if a point has a grabber,-
113 // it's not a candidate for this handler.-
114 bool stealingAllowed = event->isPressEvent() || event->isReleaseEvent();
event->isPressEvent()Description
TRUEevaluated 10 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 46 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
event->isReleaseEvent()Description
TRUEevaluated 10 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 36 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
10-46
115 for (int i = 0; i < c; ++i) {
i < cDescription
TRUEevaluated 96 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 56 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
56-96
116 QQuickEventPoint *p = event->point(i);-
117 if (!stealingAllowed) {
!stealingAllowedDescription
TRUEevaluated 52 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 44 times by 1 test
Evaluated by:
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44-52
118 QObject *exclusiveGrabber = p->exclusiveGrabber();-
119 if (exclusiveGrabber && exclusiveGrabber != this)
exclusiveGrabberDescription
TRUEevaluated 18 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 34 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
exclusiveGrabber != thisDescription
TRUEevaluated 14 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
4-34
120 continue;
executed 14 times by 1 test: continue;
Executed by:
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14
121 }
executed 38 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
38
122 if (p->state() != QQuickEventPoint::Released && wantsEventPoint(p))
p->state() != ...oint::ReleasedDescription
TRUEevaluated 72 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 10 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
wantsEventPoint(p)Description
TRUEevaluated 72 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-72
123 ret << p;
executed 72 times by 1 test: ret << p;
Executed by:
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72
124 }
executed 82 times by 1 test: end of block
Executed by:
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82
125 return ret;
executed 56 times by 1 test: return ret;
Executed by:
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56
126}-
127-
128/*!-
129 \qmlproperty int MultiPointHandler::minimumPointCount-
130-
131 The minimum number of touchpoints required to activate this handler.-
132-
133 If a smaller number of touchpoints are in contact with the-
134 \l {PointerHandler::parent}{parent}, they will be ignored.-
135-
136 Any ignored points are eligible to activate other Pointer Handlers that-
137 have different constraints, on the same Item or on other Items.-
138-
139 The default value is 2.-
140*/-
141void QQuickMultiPointHandler::setMinimumPointCount(int c)-
142{-
143 if (m_minimumPointCount == c)
m_minimumPointCount == cDescription
TRUEnever evaluated
FALSEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
0-4
144 return;
never executed: return;
0
145-
146 m_minimumPointCount = c;-
147 emit minimumPointCountChanged();-
148 if (m_maximumPointCount < 0)
m_maximumPointCount < 0Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-4
149 emit maximumPointCountChanged();
executed 4 times by 1 test: maximumPointCountChanged();
Executed by:
  • tst_multipointtoucharea_interop
4
150}
executed 4 times by 1 test: end of block
Executed by:
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4
151-
152/*!-
153 \qmlproperty int MultiPointHandler::maximumPointCount-
154-
155 The maximum number of touchpoints this handler can utilize.-
156-
157 If a larger number of touchpoints are in contact with the-
158 \l {PointerHandler::parent}{parent}, the required number of points will be-
159 chosen in the order that they are pressed, and the remaining points will-
160 be ignored.-
161-
162 Any ignored points are eligible to activate other Pointer Handlers that-
163 have different constraints, on the same Item or on other Items.-
164-
165 The default value is the same as \l minimumPointCount.-
166*/-
167void QQuickMultiPointHandler::setMaximumPointCount(int maximumPointCount)-
168{-
169 if (m_maximumPointCount == maximumPointCount)
m_maximumPoint...imumPointCountDescription
TRUEnever evaluated
FALSEnever evaluated
0
170 return;
never executed: return;
0
171-
172 m_maximumPointCount = maximumPointCount;-
173 emit maximumPointCountChanged();-
174}
never executed: end of block
0
175-
176bool QQuickMultiPointHandler::hasCurrentPoints(QQuickPointerEvent *event)-
177{-
178 bool ret = true;-
179 int c = event->pointCount();-
180 if (c < m_currentPoints.size())
c < m_currentPoints.size()Description
TRUEevaluated 34 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 49 times by 1 test
Evaluated by:
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34-49
181 return false;
executed 34 times by 1 test: return false;
Executed by:
  • tst_multipointtoucharea_interop
34
182 // TODO optimize: either ensure the points are sorted,-
183 // or use std::equal with a predicate-
184 for (int i = 0; ret && i < c; ++i) {
retDescription
TRUEevaluated 142 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 16 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
i < cDescription
TRUEevaluated 115 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 27 times by 1 test
Evaluated by:
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16-142
185 if (event->point(i)->state() == QQuickEventPoint::Released)
event->point(i...oint::ReleasedDescription
TRUEevaluated 6 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 109 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
6-109
186 return false;
executed 6 times by 1 test: return false;
Executed by:
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6
187 bool found = false;-
188 int pointId = event->point(i)->pointId();-
189 for (QQuickEventPoint *o : qAsConst(m_currentPoints))-
190 if (o && pointId == o->pointId())
oDescription
TRUEevaluated 285 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
pointId == o->pointId()Description
TRUEevaluated 93 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 192 times by 1 test
Evaluated by:
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0-285
191 found = true;
executed 93 times by 1 test: found = true;
Executed by:
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93
192 if (!found)
!foundDescription
TRUEevaluated 16 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEevaluated 93 times by 1 test
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16-93
193 ret = false;
executed 16 times by 1 test: ret = false;
Executed by:
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16
194 }
executed 109 times by 1 test: end of block
Executed by:
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109
195 return ret;
executed 43 times by 1 test: return ret;
Executed by:
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43
196}-
197-
198qreal QQuickMultiPointHandler::averageTouchPointDistance(const QPointF &ref)-
199{-
200 qreal ret = 0;-
201 if (Q_UNLIKELY(m_currentPoints.size() == 0))
__builtin_expe... == 0), false)Description
TRUEnever evaluated
FALSEevaluated 33 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
0-33
202 return ret;
never executed: return ret;
0
203 for (QQuickEventPoint *point : qAsConst(m_currentPoints))-
204 ret += QVector2D(point->scenePosition() - ref).length();
executed 99 times by 1 test: ret += QVector2D(point->scenePosition() - ref).length();
Executed by:
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99
205 return ret / m_currentPoints.size();
executed 33 times by 1 test: return ret / m_currentPoints.size();
Executed by:
  • tst_multipointtoucharea_interop
33
206}-
207-
208qreal QQuickMultiPointHandler::averageStartingDistance(const QPointF &ref)-
209{-
210 // TODO cache it in setActive()?-
211 qreal ret = 0;-
212 if (Q_UNLIKELY(m_currentPoints.size() == 0))
__builtin_expe... == 0), false)Description
TRUEnever evaluated
FALSEnever evaluated
0
213 return ret;
never executed: return ret;
0
214 for (QQuickEventPoint *point : qAsConst(m_currentPoints))-
215 ret += QVector2D(point->sceneGrabPosition() - ref).length();
never executed: ret += QVector2D(point->sceneGrabPosition() - ref).length();
0
216 return ret / m_currentPoints.size();
never executed: return ret / m_currentPoints.size();
0
217}-
218-
219QVector<QQuickMultiPointHandler::PointData> QQuickMultiPointHandler::angles(const QPointF &ref) const-
220{-
221 QVector<PointData> angles;-
222 angles.reserve(m_currentPoints.count());-
223 for (QQuickEventPoint *point : qAsConst(m_currentPoints)) {-
224 qreal angle = QLineF(ref, point->scenePosition()).angle();-
225 angles.append(PointData(point->pointId(), -angle)); // convert to clockwise, to be consistent with QQuickItem::rotation-
226 }
executed 99 times by 1 test: end of block
Executed by:
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99
227 return angles;
executed 33 times by 1 test: return angles;
Executed by:
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33
228}-
229-
230qreal QQuickMultiPointHandler::averageAngleDelta(const QVector<PointData> &old, const QVector<PointData> &newAngles)-
231{-
232 qreal avgAngleDelta = 0;-
233 int numSamples = 0;-
234-
235 auto oldBegin = old.constBegin();-
236-
237 for (PointData newData : newAngles) {-
238 quint64 id = newData.id;-
239 auto it = std::find_if(oldBegin, old.constEnd(), [id] (PointData pd) { return pd.id == id; });
executed 87 times by 1 test: return pd.id == id;
Executed by:
  • tst_multipointtoucharea_interop
87
240 qreal angleD = 0;-
241 if (it != old.constEnd()) {
it != old.constEnd()Description
TRUEevaluated 87 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-87
242 PointData oldData = *it;-
243 // We might rotate from 359 degrees to 1 degree. However, this-
244 // should be interpreted as a rotation of +2 degrees instead of-
245 // -358 degrees. Therefore, we call remainder() to translate the angle-
246 // to be in the range [-180, 180] (-350 to +10 etc)-
247 angleD = remainder(newData.angle - oldData.angle, qreal(360));-
248 // optimization: narrow down the O(n^2) search to optimally O(n)-
249 // if both vectors have the same points and they are in the same order-
250 if (it == oldBegin)
it == oldBeginDescription
TRUEevaluated 87 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-87
251 ++oldBegin;
executed 87 times by 1 test: ++oldBegin;
Executed by:
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87
252 numSamples++;-
253 }
executed 87 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
87
254 avgAngleDelta += angleD;-
255 }
executed 87 times by 1 test: end of block
Executed by:
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87
256 if (numSamples > 1)
numSamples > 1Description
TRUEevaluated 29 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-29
257 avgAngleDelta /= numSamples;
executed 29 times by 1 test: avgAngleDelta /= numSamples;
Executed by:
  • tst_multipointtoucharea_interop
29
258-
259 return avgAngleDelta;
executed 29 times by 1 test: return avgAngleDelta;
Executed by:
  • tst_multipointtoucharea_interop
29
260}-
261-
262void QQuickMultiPointHandler::acceptPoints(const QVector<QQuickEventPoint *> &points)-
263{-
264 for (QQuickEventPoint* point : points)-
265 point->setAccepted();
executed 87 times by 1 test: point->setAccepted();
Executed by:
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87
266}
executed 29 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
29
267-
268bool QQuickMultiPointHandler::grabPoints(QVector<QQuickEventPoint *> points)-
269{-
270 bool allowed = true;-
271 for (QQuickEventPoint* point : points) {-
272 if (!canGrab(point)) {
!canGrab(point)Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
0-12
273 allowed = false;-
274 break;
never executed: break;
0
275 }-
276 }
executed 12 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
12
277 if (allowed) {
allowedDescription
TRUEevaluated 4 times by 1 test
Evaluated by:
  • tst_multipointtoucharea_interop
FALSEnever evaluated
0-4
278 for (QQuickEventPoint* point : points)-
279 setExclusiveGrab(point);
executed 12 times by 1 test: setExclusiveGrab(point);
Executed by:
  • tst_multipointtoucharea_interop
12
280 }
executed 4 times by 1 test: end of block
Executed by:
  • tst_multipointtoucharea_interop
4
281 return allowed;
executed 4 times by 1 test: return allowed;
Executed by:
  • tst_multipointtoucharea_interop
4
282}-
283-
284QT_END_NAMESPACE-
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