Qt 5.7 | Qt Charts | Multiple Axes Example | main.cpp Example File

Qt 5.7.1 Reference Documentation

# main.cpp Example File

multiaxis/main.cpp

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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Charts module of the Qt Toolkit.
      **
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      #include <QtWidgets/QApplication>
      #include <QtWidgets/QMainWindow>
      #include <QtCharts/QChartView>
      #include <QtCharts/QLineSeries>
      #include <QtCharts/QSplineSeries>
      #include <QtCharts/QValueAxis>
      #include <QtCharts/QCategoryAxis>

      QT_CHARTS_USE_NAMESPACE

      int main(int argc, char *argv[])
      {
          QApplication a(argc, argv);

          QChart *chart = new QChart();
          chart->legend()->hide();
          chart->setTitle("Multiaxis chart example");

          QValueAxis *axisX = new QValueAxis;
          axisX->setTickCount(10);
          chart->addAxis(axisX, Qt::AlignBottom);

          QSplineSeries *series = new QSplineSeries;
          *series << QPointF(1, 5) << QPointF(3.5, 18) << QPointF(4.8, 7.5) << QPointF(10, 2.5);
          chart->addSeries(series);

          QValueAxis *axisY = new QValueAxis;
          axisY->setLinePenColor(series->pen().color());

          chart->addAxis(axisY, Qt::AlignLeft);
          series->attachAxis(axisX);
          series->attachAxis(axisY);

          series = new QSplineSeries;
          *series << QPointF(1, 0.5) << QPointF(1.5, 4.5) << QPointF(2.4, 2.5) << QPointF(4.3, 12.5)
                  << QPointF(5.2, 3.5) << QPointF(7.4, 16.5) << QPointF(8.3, 7.5) << QPointF(10, 17);
          chart->addSeries(series);

          QCategoryAxis *axisY3 = new QCategoryAxis;
          axisY3->append("Low", 5);
          axisY3->append("Medium", 12);
          axisY3->append("High", 17);
          axisY3->setLinePenColor(series->pen().color());
          axisY3->setGridLinePen((series->pen()));

          chart->addAxis(axisY3, Qt::AlignRight);
          series->attachAxis(axisX);
          series->attachAxis(axisY3);

          QChartView *chartView = new QChartView(chart);
          chartView->setRenderHint(QPainter::Antialiasing);

          QMainWindow window;
          window.setCentralWidget(chartView);
          window.resize(800, 600);
          window.show();

          return a.exec();
      }