Qt 5.7 | Qt Charts | Temperature Records Example | main.cpp Example File

Qt 5.7.1 Reference Documentation

# main.cpp Example File

temperaturerecords/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/QLegend>
      #include <QtCharts/QBarCategoryAxis>
      #include <QtCharts/QStackedBarSeries>

      QT_CHARTS_USE_NAMESPACE

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

          QBarSet *low = new QBarSet("Min");
          QBarSet *high = new QBarSet("Max");

          *low << -52 << -50 << -45.3 << -37.0 << -25.6 << -8.0 << -6.0 << -11.8 << -19.7 << -32.8 << -43.0 << -48.0;
          *high << 11.9 << 12.8 << 18.5 << 26.5 << 32.0 << 34.8 << 38.2 << 34.8 << 29.8 << 20.4 << 15.1 << 11.8;

          QStackedBarSeries *series = new QStackedBarSeries();
          series->append(low);
          series->append(high);

          QChart *chart = new QChart();
          chart->addSeries(series);
          chart->setTitle("Temperature records in celcius");
          chart->setAnimationOptions(QChart::SeriesAnimations);

          QStringList categories;
          categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sep" << "Oct" << "Nov" << "Dec";

          QBarCategoryAxis *axis = new QBarCategoryAxis();
          axis->append(categories);
          axis->setTitleText("Month");
          chart->createDefaultAxes();
          chart->setAxisX(axis, series);
          chart->axisY(series)->setRange(-52, 52);
          chart->axisY(series)->setTitleText("Temperature [&deg;C]");

          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(600, 300);
          window.show();

          return a.exec();
      }