Qt 5.8 | Qt Charts | Zoom Line Example | main.cpp Example File

Qt 5.8.0 Reference Documentation

# main.cpp Example File

zoomlinechart/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 "chart.h"
      #include "chartview.h"
      #include <QtWidgets/QApplication>
      #include <QtWidgets/QMainWindow>
      #include <QtCore/QtMath>
      #include <QtCharts/QLineSeries>
      #include <QtCharts/QValueAxis>

      QT_CHARTS_USE_NAMESPACE

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

          QLineSeries *series = new QLineSeries();
          for (int i = 0; i < 500; i++) {
              QPointF p((qreal) i, qSin(M_PI / 50 * i) * 100);
              p.ry() += qrand() % 20;
              *series << p;
          }

          Chart *chart = new Chart();
          chart->addSeries(series);
          chart->setTitle("Zoom in/out example");
          chart->setAnimationOptions(QChart::SeriesAnimations);
          chart->legend()->hide();
          chart->createDefaultAxes();

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

          QMainWindow window;
          window.setCentralWidget(chartView);
          window.resize(400, 300);
          window.grabGesture(Qt::PanGesture);
          window.grabGesture(Qt::PinchGesture);
          window.show();

          return a.exec();
      }