1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4#include "scatteritemmodelhandler_p.h"
5
6#include <QtGui/qquaternion.h>
7
8QT_BEGIN_NAMESPACE
9
10ScatterItemModelHandler::ScatterItemModelHandler(QItemModelScatterDataProxy *proxy, QObject *parent)
11 : AbstractItemModelHandler(parent),
12 m_proxy(proxy),
13 m_proxyArray(0),
14 m_xPosRole(noRoleIndex),
15 m_yPosRole(noRoleIndex),
16 m_zPosRole(noRoleIndex),
17 m_rotationRole(noRoleIndex),
18 m_haveXPosPattern(false),
19 m_haveYPosPattern(false),
20 m_haveZPosPattern(false),
21 m_haveRotationPattern(false)
22{
23}
24
25ScatterItemModelHandler::~ScatterItemModelHandler()
26{
27}
28
29void ScatterItemModelHandler::handleDataChanged(const QModelIndex &topLeft,
30 const QModelIndex &bottomRight,
31 const QList<int> &roles)
32{
33 // Do nothing if full reset already pending
34 if (!m_fullReset) {
35 if (m_itemModel->columnCount() > 1) {
36 // If the data model is multi-column, do full asynchronous reset to simplify things
37 AbstractItemModelHandler::handleDataChanged(topLeft, bottomRight, roles);
38 } else {
39 int start = qMin(a: topLeft.row(), b: bottomRight.row());
40 int end = qMax(a: topLeft.row(), b: bottomRight.row());
41
42 QScatterDataArray array(end - start + 1);
43 int count = 0;
44 for (int i = start; i <= end; i++)
45 modelPosToScatterItem(modelRow: i, modelColumn: 0, item&: array[count++]);
46
47 m_proxy->setItems(index: start, items: array);
48 }
49 }
50}
51
52void ScatterItemModelHandler::handleRowsInserted(const QModelIndex &parent, int start, int end)
53{
54 // Do nothing if full reset already pending
55 if (!m_fullReset) {
56 if (!m_proxy->itemCount() || m_itemModel->columnCount() > 1) {
57 // If inserting into an empty array, do full asynchronous reset to avoid multiple
58 // separate inserts when initializing the model.
59 // If the data model is multi-column, do full asynchronous reset to simplify things
60 AbstractItemModelHandler::handleRowsInserted(parent, start, end);
61 } else {
62 QScatterDataArray array(end - start + 1);
63 int count = 0;
64 for (int i = start; i <= end; i++)
65 modelPosToScatterItem(modelRow: i, modelColumn: 0, item&: array[count++]);
66
67 m_proxy->insertItems(index: start, items: array);
68 }
69 }
70}
71
72void ScatterItemModelHandler::handleRowsRemoved(const QModelIndex &parent, int start, int end)
73{
74 Q_UNUSED(parent);
75
76 // Do nothing if full reset already pending
77 if (!m_fullReset) {
78 if (m_itemModel->columnCount() > 1) {
79 // If the data model is multi-column, do full asynchronous reset to simplify things
80 AbstractItemModelHandler::handleRowsRemoved(parent, start, end);
81 } else {
82 m_proxy->removeItems(index: start, removeCount: end - start + 1);
83 }
84 }
85}
86
87static inline QQuaternion toQuaternion(const QVariant &variant)
88{
89 if (variant.canConvert<QQuaternion>()) {
90 return variant.value<QQuaternion>();
91 } else if (variant.canConvert<QString>()) {
92 QString s = variant.toString();
93 if (!s.isEmpty()) {
94 bool angleAndAxis = false;
95 if (s.startsWith(c: QLatin1Char('@'))) {
96 angleAndAxis = true;
97 s = s.mid(position: 1);
98 }
99 if (s.count(c: QLatin1Char(',')) == 3) {
100 int index = s.indexOf(ch: QLatin1Char(','));
101 int index2 = s.indexOf(ch: QLatin1Char(','), from: index + 1);
102 int index3 = s.indexOf(ch: QLatin1Char(','), from: index2 + 1);
103
104 bool sGood, xGood, yGood, zGood;
105 float sCoord = s.left(n: index).toFloat(ok: &sGood);
106 float xCoord = s.mid(position: index + 1, n: index2 - index - 1).toFloat(ok: &xGood);
107 float yCoord = s.mid(position: index2 + 1, n: index3 - index2 - 1).toFloat(ok: &yGood);
108 float zCoord = s.mid(position: index3 + 1).toFloat(ok: &zGood);
109
110 if (sGood && xGood && yGood && zGood) {
111 if (angleAndAxis)
112 return QQuaternion::fromAxisAndAngle(x: xCoord, y: yCoord, z: zCoord, angle: sCoord);
113 else
114 return QQuaternion(sCoord, xCoord, yCoord, zCoord);
115 }
116 }
117 }
118 }
119 return QQuaternion();
120}
121
122void ScatterItemModelHandler::modelPosToScatterItem(int modelRow, int modelColumn,
123 QScatterDataItem &item)
124{
125 QModelIndex index = m_itemModel->index(row: modelRow, column: modelColumn);
126 float xPos;
127 float yPos;
128 float zPos;
129 if (m_xPosRole != noRoleIndex) {
130 QVariant xValueVar = index.data(arole: m_xPosRole);
131 if (m_haveXPosPattern)
132 xPos = xValueVar.toString().replace(re: m_xPosPattern, after: m_xPosReplace).toFloat();
133 else
134 xPos = xValueVar.toFloat();
135 } else {
136 xPos = 0.0f;
137 }
138 if (m_yPosRole != noRoleIndex) {
139 QVariant yValueVar = index.data(arole: m_yPosRole);
140 if (m_haveYPosPattern)
141 yPos = yValueVar.toString().replace(re: m_yPosPattern, after: m_yPosReplace).toFloat();
142 else
143 yPos = yValueVar.toFloat();
144 } else {
145 yPos = 0.0f;
146 }
147 if (m_zPosRole != noRoleIndex) {
148 QVariant zValueVar = index.data(arole: m_zPosRole);
149 if (m_haveZPosPattern)
150 zPos = zValueVar.toString().replace(re: m_zPosPattern, after: m_zPosReplace).toFloat();
151 else
152 zPos = zValueVar.toFloat();
153 } else {
154 zPos = 0.0f;
155 }
156 if (m_rotationRole != noRoleIndex) {
157 QVariant rotationVar = index.data(arole: m_rotationRole);
158 if (m_haveRotationPattern) {
159 item.setRotation(
160 toQuaternion(
161 variant: QVariant(rotationVar.toString().replace(re: m_rotationPattern,
162 after: m_rotationReplace))));
163 } else {
164 item.setRotation(toQuaternion(variant: rotationVar));
165 }
166 }
167
168 item.setPosition(QVector3D(xPos, yPos, zPos));
169}
170
171// Resolve entire item model into QScatterDataArray.
172void ScatterItemModelHandler::resolveModel()
173{
174 if (m_itemModel.isNull()) {
175 m_proxy->resetArray(newArray: 0);
176 m_proxyArray = 0;
177 return;
178 }
179
180 m_xPosPattern = m_proxy->xPosRolePattern();
181 m_yPosPattern = m_proxy->yPosRolePattern();
182 m_zPosPattern = m_proxy->zPosRolePattern();
183 m_rotationPattern = m_proxy->rotationRolePattern();
184 m_xPosReplace = m_proxy->xPosRoleReplace();
185 m_yPosReplace = m_proxy->yPosRoleReplace();
186 m_zPosReplace = m_proxy->zPosRoleReplace();
187 m_rotationReplace = m_proxy->rotationRoleReplace();
188 m_haveXPosPattern = !m_xPosPattern.namedCaptureGroups().isEmpty() && m_xPosPattern.isValid();
189 m_haveYPosPattern = !m_yPosPattern.namedCaptureGroups().isEmpty() && m_yPosPattern.isValid();
190 m_haveZPosPattern = !m_zPosPattern.namedCaptureGroups().isEmpty() && m_zPosPattern.isValid();
191 m_haveRotationPattern = !m_rotationPattern.namedCaptureGroups().isEmpty() && m_rotationPattern.isValid();
192
193 QHash<int, QByteArray> roleHash = m_itemModel->roleNames();
194 m_xPosRole = roleHash.key(value: m_proxy->xPosRole().toLatin1(), defaultKey: noRoleIndex);
195 m_yPosRole = roleHash.key(value: m_proxy->yPosRole().toLatin1(), defaultKey: noRoleIndex);
196 m_zPosRole = roleHash.key(value: m_proxy->zPosRole().toLatin1(), defaultKey: noRoleIndex);
197 m_rotationRole = roleHash.key(value: m_proxy->rotationRole().toLatin1(), defaultKey: noRoleIndex);
198 const int columnCount = m_itemModel->columnCount();
199 const int rowCount = m_itemModel->rowCount();
200 const int totalCount = rowCount * columnCount;
201 int runningCount = 0;
202
203 // If dimensions have changed, recreate the array
204 if (m_proxyArray != m_proxy->array() || totalCount != m_proxyArray->size())
205 m_proxyArray = new QScatterDataArray(totalCount);
206
207 // Parse data into newProxyArray
208 for (int i = 0; i < rowCount; i++) {
209 for (int j = 0; j < columnCount; j++) {
210 modelPosToScatterItem(modelRow: i, modelColumn: j, item&: (*m_proxyArray)[runningCount]);
211 runningCount++;
212 }
213 }
214
215 m_proxy->resetArray(newArray: m_proxyArray);
216}
217
218QT_END_NAMESPACE
219

source code of qtdatavis3d/src/datavisualization/data/scatteritemmodelhandler.cpp