customitemgraph.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the Qt Data Visualization module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:GPL$
  ** 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 https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://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 3 or (at your option) any later version
  ** approved by the KDE Free Qt Foundation. The licenses are as published by
  ** the Free Software Foundation and appearing in the file LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #include "customitemgraph.h"

  #include <QtDataVisualization/Q3DTheme>
  #include <QtDataVisualization/QCustom3DItem>
  #include <QtDataVisualization/QCustom3DLabel>
  #include <QtGui/QImage>

  using namespace QtDataVisualization;

  CustomItemGraph::CustomItemGraph(Q3DSurface *surface, QLabel *label)
      : m_graph(surface),
        m_textField(label),
        m_previouslyAnimatedItem(0)
  {
      QImage layerOneHMap(":/maps/layer_1.png");
      QHeightMapSurfaceDataProxy *layerOneProxy = new QHeightMapSurfaceDataProxy(layerOneHMap);
      QSurface3DSeries *layerOneSeries = new QSurface3DSeries(layerOneProxy);
      layerOneSeries->setItemLabelFormat(QStringLiteral("(@xLabel, @zLabel): @yLabel"));
      layerOneProxy->setValueRanges(34.0f, 40.0f, 18.0f, 24.0f);
      layerOneSeries->setDrawMode(QSurface3DSeries::DrawSurface);
      layerOneSeries->setFlatShadingEnabled(false);

      QImage layerTwoHMap(":/maps/layer_2.png");
      QHeightMapSurfaceDataProxy *layerTwoProxy = new QHeightMapSurfaceDataProxy(layerTwoHMap);
      QSurface3DSeries *layerTwoSeries = new QSurface3DSeries(layerTwoProxy);
      layerTwoSeries->setItemLabelFormat(QStringLiteral("(@xLabel, @zLabel): @yLabel"));
      layerTwoProxy->setValueRanges(34.0f, 40.0f, 18.0f, 24.0f);
      layerTwoSeries->setDrawMode(QSurface3DSeries::DrawSurface);
      layerTwoSeries->setFlatShadingEnabled(false);

      QImage layerThreeHMap(":/maps/layer_3.png");
      QHeightMapSurfaceDataProxy *layerThreeProxy = new QHeightMapSurfaceDataProxy(layerThreeHMap);
      QSurface3DSeries *layerThreeSeries = new QSurface3DSeries(layerThreeProxy);
      layerThreeSeries->setItemLabelFormat(QStringLiteral("(@xLabel, @zLabel): @yLabel"));
      layerThreeProxy->setValueRanges(34.0f, 40.0f, 18.0f, 24.0f);
      layerThreeSeries->setDrawMode(QSurface3DSeries::DrawSurface);
      layerThreeSeries->setFlatShadingEnabled(false);

      m_graph->axisX()->setLabelFormat("%.1f N");
      m_graph->axisZ()->setLabelFormat("%.1f E");
      m_graph->axisX()->setRange(34.0f, 40.0f);
      m_graph->axisY()->setRange(0.0f, 200.0f);
      m_graph->axisZ()->setRange(18.0f, 24.0f);

      m_graph->axisX()->setTitle(QStringLiteral("Latitude"));
      m_graph->axisY()->setTitle(QStringLiteral("Height"));
      m_graph->axisZ()->setTitle(QStringLiteral("Longitude"));

      m_graph->addSeries(layerOneSeries);
      m_graph->addSeries(layerTwoSeries);
      m_graph->addSeries(layerThreeSeries);

      QLinearGradient grOne;
      grOne.setColorAt(0.0, Qt::black);
      grOne.setColorAt(0.38, Qt::darkYellow);
      grOne.setColorAt(0.39, Qt::darkGreen);
      grOne.setColorAt(0.5, Qt::darkGray);
      grOne.setColorAt(1.0, Qt::gray);
      m_graph->seriesList().at(0)->setBaseGradient(grOne);
      m_graph->seriesList().at(0)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);

      QLinearGradient grTwo;
      grTwo.setColorAt(0.385, Qt::blue);
      grTwo.setColorAt(0.395, Qt::white);
      m_graph->seriesList().at(1)->setBaseGradient(grTwo);
      m_graph->seriesList().at(1)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);

      QLinearGradient grThree;
      grThree.setColorAt(0.0, Qt::white);
      grThree.setColorAt(0.05, Qt::black);
      m_graph->seriesList().at(2)->setBaseGradient(grThree);
      m_graph->seriesList().at(2)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);

      m_graph->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFront);

      connect(m_graph, &QAbstract3DGraph::selectedElementChanged,
              this, &CustomItemGraph::handleElementSelected);

      m_selectionAnimation = new QPropertyAnimation(this);
      m_selectionAnimation->setPropertyName("scaling");
      m_selectionAnimation->setDuration(500);
      m_selectionAnimation->setLoopCount(-1);

      QFont titleFont = QFont("Century Gothic", 30);
      titleFont.setBold(true);
      QCustom3DLabel *titleLabel = new QCustom3DLabel("Oil Rigs on Imaginary Sea", titleFont,
                                                      QVector3D(0.0f, 1.2f, 0.0f),
                                                      QVector3D(1.0f, 1.0f, 0.0f),
                                                      QQuaternion());
      titleLabel->setPositionAbsolute(true);
      titleLabel->setFacingCamera(true);
      titleLabel->setBackgroundColor(QColor(0x66cdaa));
      m_graph->addCustomItem(titleLabel);

      toggleItemOne(true);
      toggleItemTwo(true);
  }

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

  void CustomItemGraph::toggleItemOne(bool show)
  {
      QVector3D positionOne = QVector3D(39.0f, 77.0f, 19.2f);
      QVector3D positionOnePipe = QVector3D(39.0f, 45.0f, 19.2f);
      QVector3D positionOneLabel = QVector3D(39.0f, 107.0f, 19.2f);
      if (show) {
          QImage color = QImage(2, 2, QImage::Format_RGB32);
          color.fill(Qt::red);
          QCustom3DItem *item = new QCustom3DItem(":/items/oilrig.obj", positionOne,
                                                  QVector3D(0.025f, 0.025f, 0.025f),
                                                  QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, 45.0f),
                                                  color);
          m_graph->addCustomItem(item);
          item = new QCustom3DItem(":/items/pipe.obj", positionOnePipe,
                                   QVector3D(0.005f, 0.5f, 0.005f),
                                   QQuaternion(),
                                   color);
          item->setShadowCasting(false);
          m_graph->addCustomItem(item);

          QCustom3DLabel *label = new QCustom3DLabel();
          label->setText("Oil Rig One");
          label->setPosition(positionOneLabel);
          label->setScaling(QVector3D(1.0f, 1.0f, 1.0f));
          m_graph->addCustomItem(label);
      } else {
          resetSelection();
          m_graph->removeCustomItemAt(positionOne);
          m_graph->removeCustomItemAt(positionOnePipe);
          m_graph->removeCustomItemAt(positionOneLabel);
      }
  }

  void CustomItemGraph::toggleItemTwo(bool show)
  {
      QVector3D positionTwo = QVector3D(34.5f, 77.0f, 23.4f);
      QVector3D positionTwoPipe = QVector3D(34.5f, 45.0f, 23.4f);
      QVector3D positionTwoLabel = QVector3D(34.5f, 107.0f, 23.4f);
      if (show) {
          QImage color = QImage(2, 2, QImage::Format_RGB32);
          color.fill(Qt::red);
          QCustom3DItem *item = new QCustom3DItem();
          item->setMeshFile(":/items/oilrig.obj");
          item->setPosition(positionTwo);
          item->setScaling(QVector3D(0.025f, 0.025f, 0.025f));
          item->setRotation(QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, 25.0f));
          item->setTextureImage(color);
          m_graph->addCustomItem(item);
          item = new QCustom3DItem(":/items/pipe.obj", positionTwoPipe,
                                   QVector3D(0.005f, 0.5f, 0.005f),
                                   QQuaternion(),
                                   color);
          item->setShadowCasting(false);
          m_graph->addCustomItem(item);

          QCustom3DLabel *label = new QCustom3DLabel();
          label->setText("Oil Rig Two");
          label->setPosition(positionTwoLabel);
          label->setScaling(QVector3D(1.0f, 1.0f, 1.0f));
          m_graph->addCustomItem(label);
      } else {
          resetSelection();
          m_graph->removeCustomItemAt(positionTwo);
          m_graph->removeCustomItemAt(positionTwoPipe);
          m_graph->removeCustomItemAt(positionTwoLabel);
      }
  }

  void CustomItemGraph::toggleItemThree(bool show)
  {
      QVector3D positionThree = QVector3D(34.5f, 86.0f, 19.1f);
      QVector3D positionThreeLabel = QVector3D(34.5f, 116.0f, 19.1f);
      if (show) {
          QImage color = QImage(2, 2, QImage::Format_RGB32);
          color.fill(Qt::darkMagenta);
          QCustom3DItem *item = new QCustom3DItem();
          item->setMeshFile(":/items/refinery.obj");
          item->setPosition(positionThree);
          item->setScaling(QVector3D(0.04f, 0.04f, 0.04f));
          item->setRotation(QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, 75.0f));
          item->setTextureImage(color);
          m_graph->addCustomItem(item);

          QCustom3DLabel *label = new QCustom3DLabel();
          label->setText("Refinery");
          label->setPosition(positionThreeLabel);
          label->setScaling(QVector3D(1.0f, 1.0f, 1.0f));
          m_graph->addCustomItem(label);
      } else {
          resetSelection();
          m_graph->removeCustomItemAt(positionThree);
          m_graph->removeCustomItemAt(positionThreeLabel);
      }
  }

  void CustomItemGraph::toggleSeeThrough(bool seethrough)
  {
      if (seethrough) {
          m_graph->seriesList().at(0)->setDrawMode(QSurface3DSeries::DrawWireframe);
          m_graph->seriesList().at(1)->setDrawMode(QSurface3DSeries::DrawWireframe);
      } else {
          m_graph->seriesList().at(0)->setDrawMode(QSurface3DSeries::DrawSurface);
          m_graph->seriesList().at(1)->setDrawMode(QSurface3DSeries::DrawSurface);
      }
  }

  void CustomItemGraph::toggleOilHighlight(bool highlight)
  {
      if (highlight) {
          QLinearGradient grThree;
          grThree.setColorAt(0.0, Qt::black);
          grThree.setColorAt(0.05, Qt::red);
          m_graph->seriesList().at(2)->setBaseGradient(grThree);
      } else {
          QLinearGradient grThree;
          grThree.setColorAt(0.0, Qt::white);
          grThree.setColorAt(0.05, Qt::black);
          m_graph->seriesList().at(2)->setBaseGradient(grThree);
      }
  }

  void CustomItemGraph::toggleShadows(bool shadows)
  {
      if (shadows)
          m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityMedium);
      else
          m_graph->setShadowQuality(QAbstract3DGraph::ShadowQualityNone);
  }

  void CustomItemGraph::handleElementSelected(QAbstract3DGraph::ElementType type)
  {
      resetSelection();
      if (type == QAbstract3DGraph::ElementCustomItem) {
          QCustom3DItem *item = m_graph->selectedCustomItem();
          QString text;
          if (qobject_cast<QCustom3DLabel *>(item) != 0) {
              text.append("Custom label: ");
          } else {
              QStringList split = item->meshFile().split("/");
              text.append(split.last());
              text.append(": ");
          }
          int index = m_graph->selectedCustomItemIndex();
          text.append(QString::number(index));
          m_textField->setText(text);
          m_previouslyAnimatedItem = item;
          m_previousScaling = item->scaling();
          m_selectionAnimation->setTargetObject(item);
          m_selectionAnimation->setStartValue(item->scaling());
          m_selectionAnimation->setEndValue(item->scaling() * 1.5f);
          m_selectionAnimation->start();
      } else if (type == QAbstract3DGraph::ElementSeries) {
          QString text = "Surface (";
          QSurface3DSeries *series = m_graph->selectedSeries();
          if (series) {
              QPoint point = series->selectedPoint();
              QString posStr;
              posStr.setNum(point.x());
              text.append(posStr);
              text.append(", ");
              posStr.setNum(point.y());
              text.append(posStr);
          }
          text.append(")");
          m_textField->setText(text);
      } else if (type > QAbstract3DGraph::ElementSeries
                 && type < QAbstract3DGraph::ElementCustomItem) {
          int index = m_graph->selectedLabelIndex();
          QString text;
          if (type == QAbstract3DGraph::ElementAxisXLabel)
              text.append("Axis X label: ");
          else if (type == QAbstract3DGraph::ElementAxisYLabel)
              text.append("Axis Y label: ");
          else
              text.append("Axis Z label: ");
          text.append(QString::number(index));
          m_textField->setText(text);
      } else {
          m_textField->setText("Nothing");
      }
  }

  void CustomItemGraph::resetSelection()
  {
      m_selectionAnimation->stop();
      if (m_previouslyAnimatedItem)
          m_previouslyAnimatedItem->setScaling(m_previousScaling);
      m_previouslyAnimatedItem = 0;
  }