main.cpp Example File

candlestickchart/main.cpp
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 ** Contact: https://www.qt.io/licensing/
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 ** This file is part of the Qt Charts module of the Qt Toolkit.
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 #include <QtCharts/QBarCategoryAxis>
 #include <QtCharts/QCandlestickSeries>
 #include <QtCharts/QChartView>
 #include <QtCharts/QValueAxis>
 #include <QtCore/QDateTime>
 #include <QtWidgets/QApplication>
 #include <QtWidgets/QMainWindow>

 #include "candlestickdatareader.h"

 QT_CHARTS_USE_NAMESPACE

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

     QCandlestickSeries *acmeSeries = new QCandlestickSeries();
     acmeSeries->setName("Acme Ltd");
     acmeSeries->setIncreasingColor(QColor(Qt::green));
     acmeSeries->setDecreasingColor(QColor(Qt::red));

     QFile acmeData(":acme");
     if (!acmeData.open(QIODevice::ReadOnly | QIODevice::Text))
         return 1;

     QStringList categories;

     CandlestickDataReader dataReader(&acmeData);
     while (!dataReader.atEnd()) {
         QCandlestickSet *set = dataReader.readCandlestickSet();
         if (set) {
             acmeSeries->append(set);
             categories << QDateTime::fromMSecsSinceEpoch(set->timestamp()).toString("dd");
         }
     }

     QChart *chart = new QChart();
     chart->addSeries(acmeSeries);
     chart->setTitle("Acme Ltd Historical Data (July 2015)");
     chart->setAnimationOptions(QChart::SeriesAnimations);

     chart->createDefaultAxes();

     QBarCategoryAxis *axisX = qobject_cast<QBarCategoryAxis *>(chart->axes(Qt::Horizontal).at(0));
     axisX->setCategories(categories);

     QValueAxis *axisY = qobject_cast<QValueAxis *>(chart->axes(Qt::Vertical).at(0));
     axisY->setMax(axisY->max() * 1.01);
     axisY->setMin(axisY->min() * 0.99);

     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(800, 600);
     window.show();

     return a.exec();
 }