Qt 5.7 | Qt Charts | Line and BarChart Example | main.cpp Example File

Qt 5.7.1 Reference Documentation

# main.cpp Example File

lineandbar/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/QBarSeries>
      #include <QtCharts/QBarSet>
      #include <QtCharts/QLineSeries>
      #include <QtCharts/QLegend>
      #include <QtCharts/QBarCategoryAxis>
      #include <QtCharts/QValueAxis>

      QT_CHARTS_USE_NAMESPACE

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

          QBarSet *set0 = new QBarSet("Jane");
          QBarSet *set1 = new QBarSet("John");
          QBarSet *set2 = new QBarSet("Axel");
          QBarSet *set3 = new QBarSet("Mary");
          QBarSet *set4 = new QBarSet("Sam");

          *set0 << 1 << 2 << 3 << 4 << 5 << 6;
          *set1 << 5 << 0 << 0 << 4 << 0 << 7;
          *set2 << 3 << 5 << 8 << 13 << 8 << 5;
          *set3 << 5 << 6 << 7 << 3 << 4 << 5;
          *set4 << 9 << 7 << 5 << 3 << 1 << 2;

          QBarSeries *barseries = new QBarSeries();
          barseries->append(set0);
          barseries->append(set1);
          barseries->append(set2);
          barseries->append(set3);
          barseries->append(set4);

          QLineSeries *lineseries = new QLineSeries();
          lineseries->setName("trend");
          lineseries->append(QPoint(0, 4));
          lineseries->append(QPoint(1, 15));
          lineseries->append(QPoint(2, 20));
          lineseries->append(QPoint(3, 4));
          lineseries->append(QPoint(4, 12));
          lineseries->append(QPoint(5, 17));

          QChart *chart = new QChart();
          chart->addSeries(barseries);
          chart->addSeries(lineseries);
          chart->setTitle("Line and barchart example");

          QStringList categories;
          categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun";
          QBarCategoryAxis *axisX = new QBarCategoryAxis();
          axisX->append(categories);
          chart->setAxisX(axisX, lineseries);
          chart->setAxisX(axisX, barseries);
          axisX->setRange(QString("Jan"), QString("Jun"));

          QValueAxis *axisY = new QValueAxis();
          chart->setAxisY(axisY, lineseries);
          chart->setAxisY(axisY, barseries);
          axisY->setRange(0, 20);

          chart->legend()->setVisible(true);
          chart->legend()->setAlignment(Qt::AlignBottom);

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

          QMainWindow window;
          window.setCentralWidget(chartView);
          window.resize(440, 300);
          window.show();

          return a.exec();
      }