scatterdatamodifier.cpp Example File

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  #include "scatterdatamodifier.h"
  #include <QtDataVisualization/qscatterdataproxy.h>
  #include <QtDataVisualization/qvalue3daxis.h>
  #include <QtDataVisualization/q3dscene.h>
  #include <QtDataVisualization/q3dcamera.h>
  #include <QtDataVisualization/qscatter3dseries.h>
  #include <QtDataVisualization/q3dtheme.h>
  #include <QtCore/qmath.h>
  #include <QtWidgets/QComboBox>

  using namespace QtDataVisualization;

  //#define RANDOM_SCATTER // Uncomment this to switch to random scatter

  const int numberOfItems = 3600;
  const float curveDivider = 3.0f;
  const int lowerNumberOfItems = 900;
  const float lowerCurveDivider = 0.75f;

  ScatterDataModifier::ScatterDataModifier(Q3DScatter *scatter)
      : m_graph(scatter),
        m_fontSize(40.0f),
        m_style(QAbstract3DSeries::MeshSphere),
        m_smooth(true),
        m_itemCount(lowerNumberOfItems),
        m_curveDivider(lowerCurveDivider)
  {
      m_graph->activeTheme()->setType(Q3DTheme::ThemeEbony);
      QFont font = m_graph->activeTheme()->font();
      font.setPointSize(m_fontSize);
      m_graph->activeTheme()->setFont(font);
      m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualitySoftLow);
      m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);

      QScatterDataProxy *proxy = new QScatterDataProxy;
      QScatter3DSeries *series = new QScatter3DSeries(proxy);
      series->setItemLabelFormat(QStringLiteral("@xTitle: @xLabel @yTitle: @yLabel @zTitle: @zLabel"));
      series->setMeshSmooth(m_smooth);
      m_graph->addSeries(series);

      addData();
  }

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

  void ScatterDataModifier::addData()
  {
      // Configure the axes according to the data
      m_graph->axisX()->setTitle("X");
      m_graph->axisY()->setTitle("Y");
      m_graph->axisZ()->setTitle("Z");

      QScatterDataArray *dataArray = new QScatterDataArray;
      dataArray->resize(m_itemCount);
      QScatterDataItem *ptrToDataArray = &dataArray->first();

  #ifdef RANDOM_SCATTER
      for (int i = 0; i < m_itemCount; i++) {
          ptrToDataArray->setPosition(randVector());
          ptrToDataArray++;
      }
  #else
      float limit = qSqrt(m_itemCount) / 2.0f;
      for (float i = -limit; i < limit; i++) {
          for (float j = -limit; j < limit; j++) {
              ptrToDataArray->setPosition(QVector3D(i + 0.5f,
                                                    qCos(qDegreesToRadians((i * j) / m_curveDivider)),
                                                    j + 0.5f));
              ptrToDataArray++;
          }
      }
  #endif

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

  void ScatterDataModifier::changeStyle(int style)
  {
      QComboBox *comboBox = qobject_cast<QComboBox *>(sender());
      if (comboBox) {
          m_style = QAbstract3DSeries::Mesh(comboBox->itemData(style).toInt());
          if (m_graph->seriesList().size())
              m_graph->seriesList().at(0)->setMesh(m_style);
      }
  }

  void ScatterDataModifier::setSmoothDots(int smooth)
  {
      m_smooth = bool(smooth);
      QScatter3DSeries *series = m_graph->seriesList().at(0);
      series->setMeshSmooth(m_smooth);
  }

  void ScatterDataModifier::changeTheme(int theme)
  {
      Q3DTheme *currentTheme = m_graph->activeTheme();
      currentTheme->setType(Q3DTheme::Theme(theme));
      emit backgroundEnabledChanged(currentTheme->isBackgroundEnabled());
      emit gridEnabledChanged(currentTheme->isGridEnabled());
      emit fontChanged(currentTheme->font());
  }

  void ScatterDataModifier::changePresetCamera()
  {
      static int preset = Q3DCamera::CameraPresetFrontLow;

      m_graph->scene()->activeCamera()->setCameraPreset((Q3DCamera::CameraPreset)preset);

      if (++preset > Q3DCamera::CameraPresetDirectlyBelow)
          preset = Q3DCamera::CameraPresetFrontLow;
  }

  void ScatterDataModifier::changeLabelStyle()
  {
      m_graph->activeTheme()->setLabelBackgroundEnabled(!m_graph->activeTheme()->isLabelBackgroundEnabled());
  }

  void ScatterDataModifier::changeFont(const QFont &font)
  {
      QFont newFont = font;
      newFont.setPointSizeF(m_fontSize);
      m_graph->activeTheme()->setFont(newFont);
  }

  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);
  }

  void ScatterDataModifier::setBackgroundEnabled(int enabled)
  {
      m_graph->activeTheme()->setBackgroundEnabled((bool)enabled);
  }

  void ScatterDataModifier::setGridEnabled(int enabled)
  {
      m_graph->activeTheme()->setGridEnabled((bool)enabled);
  }

  void ScatterDataModifier::toggleItemCount()
  {
      if (m_itemCount == numberOfItems) {
          m_itemCount = lowerNumberOfItems;
          m_curveDivider = lowerCurveDivider;
      } else {
          m_itemCount = numberOfItems;
          m_curveDivider = curveDivider;
      }
      m_graph->seriesList().at(0)->dataProxy()->resetArray(0);
      addData();
  }

  QVector3D ScatterDataModifier::randVector()
  {
      return QVector3D(
                  (float)(rand() % 100) / 2.0f - (float)(rand() % 100) / 2.0f,
                  (float)(rand() % 100) / 100.0f - (float)(rand() % 100) / 100.0f,
                  (float)(rand() % 100) / 2.0f - (float)(rand() % 100) / 2.0f);
  }