Qt 5.7 | Qt Data Visualization | Textured Surface Example | surfacegraph.cpp Example File

Qt 5.7.1 Reference Documentation

# surfacegraph.cpp Example File

texturesurface/surfacegraph.cpp

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      #include "surfacegraph.h"
      #include "topographicseries.h"

      #include <QtDataVisualization/QValue3DAxis>
      #include <QtDataVisualization/Q3DTheme>

      using namespace QtDataVisualization;

      const float areaWidth = 8000.0f;
      const float areaHeight = 8000.0f;
      const float aspectRatio = 0.1389f;
      const float minRange = areaWidth * 0.49f;

      SurfaceGraph::SurfaceGraph(Q3DSurface *surface)
          : m_graph(surface)
      {
          m_graph->setAxisX(new QValue3DAxis);
          m_graph->setAxisY(new QValue3DAxis);
          m_graph->setAxisZ(new QValue3DAxis);
          m_graph->axisX()->setLabelFormat("%i");
          m_graph->axisZ()->setLabelFormat("%i");
          m_graph->axisX()->setRange(0.0f, areaWidth);
          m_graph->axisY()->setRange(100.0f, areaWidth * aspectRatio);
          m_graph->axisZ()->setRange(0.0f, areaHeight);
          m_graph->axisX()->setLabelAutoRotation(30);
          m_graph->axisY()->setLabelAutoRotation(90);
          m_graph->axisZ()->setLabelAutoRotation(30);
          m_graph->activeTheme()->setType(Q3DTheme::ThemePrimaryColors);

          QFont font = m_graph->activeTheme()->font();
          font.setPointSize(20);
          m_graph->activeTheme()->setFont(font);

          m_topography = new TopographicSeries();
          m_topography->setTopographyFile(":/maps/topography", areaWidth, areaHeight);
          m_topography->setItemLabelFormat(QStringLiteral("@yLabel m"));

          m_highlight = new HighlightSeries();
          m_highlight->setTopographicSeries(m_topography);
          m_highlight->setMinHeight(minRange * aspectRatio);
          m_highlight->handleGradientChange(areaWidth * aspectRatio);
          QObject::connect(m_graph->axisY(), &QValue3DAxis::maxChanged,
                           m_highlight, &HighlightSeries::handleGradientChange);

          m_graph->addSeries(m_topography);
          m_graph->addSeries(m_highlight);

          m_inputHandler = new CustomInputHandler(m_graph);
          m_inputHandler->setHighlightSeries(m_highlight);
          m_inputHandler->setAxes(m_graph->axisX(), m_graph->axisY(), m_graph->axisZ());
          m_inputHandler->setLimits(0.0f, areaWidth, minRange);
          m_inputHandler->setAspectRatio(aspectRatio);

          m_graph->setActiveInputHandler(m_inputHandler);
      }

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

      void SurfaceGraph::toggleSurfaceTexture(bool enable)
      {
          if (enable)
              m_topography->setTextureFile(":/maps/maptexture");
          else
              m_topography->setTextureFile("");
      }