surfacegraph.cpp Example File | Qt Data Visualization 5.9

Qt 5.9 | Qt Data Visualization | Textured Surface Example | surfacegraph.cpp Example File

Qt 5.9.9 Reference Documentation

# surfacegraph.cpp Example File

texturesurface/surfacegraph.cpp

      /****************************************************************************
      **
      ** 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 "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("");
      }