Custom Input Example

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 #include "scatterdatamodifier.h"

 #include <QtDataVisualization/QScatterDataProxy>
 #include <QtDataVisualization/QValue3DAxis>
 #include <QtDataVisualization/Q3DScene>
 #include <QtDataVisualization/Q3DCamera>
 #include <QtDataVisualization/QScatter3DSeries>
 #include <QtDataVisualization/Q3DTheme>
 #include <QtCore/qmath.h>
 #include <QtCore/QTextStream>
 #include <QtCore/QDebug>

 using namespace QtDataVisualization;

 ScatterDataModifier::ScatterDataModifier(Q3DScatter *scatter)
     : m_graph(scatter),
       m_inputHandler(new CustomInputHandler())
 {
     m_graph->activeTheme()->setType(Q3DTheme::ThemeDigia);
     m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityMedium);
     m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);

     m_graph->setAxisX(new QValue3DAxis);
     m_graph->setAxisY(new QValue3DAxis);
     m_graph->setAxisZ(new QValue3DAxis);

     m_graph->axisX()->setRange(-10.0f, 10.0f);
     m_graph->axisY()->setRange(-5.0f, 5.0f);
     m_graph->axisZ()->setRange(-5.0f, 5.0f);

     QScatter3DSeries *series = new QScatter3DSeries;
     series->setItemLabelFormat(QStringLiteral("@xLabel, @yLabel, @zLabel"));
     series->setMesh(QAbstract3DSeries::MeshCube);
     series->setItemSize(0.15f);
     m_graph->addSeries(series);

     m_animationCameraX = new QPropertyAnimation(m_graph->scene()->activeCamera(), "xRotation");
     m_animationCameraX->setDuration(20000);
     m_animationCameraX->setStartValue(QVariant::fromValue(0.0f));
     m_animationCameraX->setEndValue(QVariant::fromValue(360.0f));
     m_animationCameraX->setLoopCount(-1);

     QPropertyAnimation *upAnimation = new QPropertyAnimation(m_graph->scene()->activeCamera(), "yRotation");
     upAnimation->setDuration(9000);
     upAnimation->setStartValue(QVariant::fromValue(5.0f));
     upAnimation->setEndValue(QVariant::fromValue(45.0f));

     QPropertyAnimation *downAnimation = new QPropertyAnimation(m_graph->scene()->activeCamera(), "yRotation");
     downAnimation->setDuration(9000);
     downAnimation->setStartValue(QVariant::fromValue(45.0f));
     downAnimation->setEndValue(QVariant::fromValue(5.0f));

     m_animationCameraY = new QSequentialAnimationGroup();
     m_animationCameraY->setLoopCount(-1);
     m_animationCameraY->addAnimation(upAnimation);
     m_animationCameraY->addAnimation(downAnimation);

     m_animationCameraX->start();
     m_animationCameraY->start();

     // Give ownership of the handler to the graph and make it the active handler
     m_graph->setActiveInputHandler(m_inputHandler);

     m_selectionTimer = new QTimer(this);
     m_selectionTimer->setInterval(10);
     m_selectionTimer->setSingleShot(false);
     QObject::connect(m_selectionTimer, &QTimer::timeout, this,
                      &ScatterDataModifier::triggerSelection);
     m_selectionTimer->start();
 }

 ScatterDataModifier::~ScatterDataModifier()
 {
     delete m_graph;
 }

 void ScatterDataModifier::start()
 {
     addData();
 }

 void ScatterDataModifier::addData()
 {
     QVector<QVector3D> itemList;

     // Read data items from the file to QVector
     QTextStream stream;
     QFile dataFile(":/data/data.txt");
     if (dataFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
         stream.setDevice(&dataFile);
         while (!stream.atEnd()) {
             QString line = stream.readLine();
             if (line.startsWith("#")) // Ignore comments
                 continue;
             QStringList strList = line.split(",", QString::SkipEmptyParts);
             // Each line has three data items: xPos, yPos and zPos value
             if (strList.size() < 3) {
                 qWarning() << "Invalid row read from data:" << line;
                 continue;
             }
             itemList.append(QVector3D(
                                  strList.at(0).trimmed().toFloat(),
                                  strList.at(1).trimmed().toFloat(),
                                  strList.at(2).trimmed().toFloat()));
         }
     } else {
         qWarning() << "Unable to open data file:" << dataFile.fileName();
     }

     // Add data from the QVector to datamodel
     QScatterDataArray *dataArray = new QScatterDataArray;
     dataArray->resize(itemList.count());
     QScatterDataItem *ptrToDataArray = &dataArray->first();
     for (int i = 0; i < itemList.count(); i++) {
         ptrToDataArray->setPosition(itemList.at(i));
         ptrToDataArray++;
     }

     m_graph->seriesList().at(0)->dataProxy()->resetArray(dataArray);
 }

 void ScatterDataModifier::toggleCameraAnimation()
 {
     if (m_animationCameraX->state() != QAbstractAnimation::Paused) {
         m_animationCameraX->pause();
         m_animationCameraY->pause();
     } else {
         m_animationCameraX->resume();
         m_animationCameraY->resume();
     }
 }

 void ScatterDataModifier::triggerSelection()
 {
     m_graph->scene()->setSelectionQueryPosition(m_inputHandler->inputPosition());
 }

 void ScatterDataModifier::shadowQualityUpdatedByVisual(QAbstract3DGraph::ShadowQuality sq)
 {
     int quality = int(sq);
     emit shadowQualityChanged(quality); // connected to a checkbox in main.cpp
 }

 void ScatterDataModifier::changeShadowQuality(int quality)
 {
     QAbstract3DGraph::ShadowQuality sq = QAbstract3DGraph::ShadowQuality(quality);
     m_graph->setShadowQuality(sq);
 }