chartview.cpp Example File

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  #include "chartview.h"
  #include <QtCharts/QScatterSeries>
  #include <QtCharts/QLegendMarker>
  #include <QtGui/QImage>
  #include <QtGui/QPainter>
  #include <QtCore/QtMath>

  const float Pi = 3.14159f;

  ChartView::ChartView(QWidget *parent) :
      QChartView(new QChart(), parent)
  {
      QScatterSeries *series0 = new QScatterSeries();
      series0->setName("scatter1");
      series0->setMarkerShape(QScatterSeries::MarkerShapeCircle);
      series0->setMarkerSize(15.0);

      QScatterSeries *series1 = new QScatterSeries();
      series1->setName("scatter2");
      series1->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
      series1->setMarkerSize(20.0);

      QScatterSeries *series2 = new QScatterSeries();
      series2->setName("scatter3");
      series2->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
      series2->setMarkerSize(30.0);

      series0->append(0, 6);
      series0->append(2, 4);
      series0->append(3, 8);
      series0->append(7, 4);
      series0->append(10, 5);

      *series1 << QPointF(1, 1) << QPointF(3, 3) << QPointF(7, 6) << QPointF(8, 3) << QPointF(10, 2);
      *series2 << QPointF(1, 5) << QPointF(4, 6) << QPointF(6, 3) << QPointF(9, 5);

      QPainterPath starPath;
      starPath.moveTo(30, 15);
      for (int i = 1; i < 5; ++i) {
          starPath.lineTo(15 + 15 * qCos(0.8 * i * Pi),
                          15 + 15 * qSin(0.8 * i * Pi));
      }
      starPath.closeSubpath();

      QImage star(30, 30, QImage::Format_ARGB32);
      star.fill(Qt::transparent);

      QPainter painter(&star);
      painter.setRenderHint(QPainter::Antialiasing);
      painter.setPen(QRgb(0xf6a625));
      painter.setBrush(painter.pen().color());
      painter.drawPath(starPath);

      series2->setBrush(star);

      setRenderHint(QPainter::Antialiasing);
      chart()->addSeries(series0);
      chart()->addSeries(series1);
      chart()->addSeries(series2);

      chart()->setTitle("Simple scatterchart example");
      chart()->createDefaultAxes();
      chart()->setDropShadowEnabled(false);

      QList<QLegendMarker *> markers = chart()->legend()->markers(series2);
      for (int i = 0; i < markers.count(); i++)
          markers.at(i)->setBrush(painter.pen().color());
  }