main.cpp Example File

  /****************************************************************************
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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.
  **
  ** $QT_BEGIN_LICENSE:GPL$
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  ** Licensees holding valid commercial Qt licenses may use this file in
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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();
  }