Function main

examples/Plotter/Advanced/main.cpp:25–204

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    KDChart::Chart chart;

    QStandardItemModel model;

    model.setRowCount(100);
    model.setColumnCount(6); // 3 data sets
    for (int i = 0; i < 100; ++i) {
        // dateset 1
        qreal t = i;
        qreal v = qreal(i) * i;
        QModelIndex index = model.index(i, 0);
        model.setData(index, QVariant(t));
        index = model.index(i, 1);
        model.setData(index, QVariant(v));

        // dateset 2
        t = i * 2;
        v = qreal(i) * i - i;
        index = model.index(i, 2);
        model.setData(index, QVariant(t));
        index = model.index(i, 3);
        model.setData(index, QVariant(v));

        // dateset 3
        t = qreal(i) / 2;
        v = qreal(i) * i + i;
        index = model.index(i, 4);
        model.setData(index, QVariant(t));
        index = model.index(i, 5);
        model.setData(index, QVariant(v));
    }

    model.setHeaderData(0, Qt::Horizontal, "Dataset 1");
    model.setHeaderData(2, Qt::Horizontal, "Dataset 2");
    model.setHeaderData(4, Qt::Horizontal, "Dataset 3");

    // general chart layout
    KDChart::FrameAttributes fm = chart.frameAttributes();
    fm.setVisible(true);
    fm.setPen(QPen(Qt::black));
    chart.setFrameAttributes(fm);
    chart.setGlobalLeading(10, 0, 10, 10);

    KDChart::BackgroundAttributes chart_bg;
    chart_bg.setBrush(Qt::white);
    chart_bg.setVisible(true);
    chart.setBackgroundAttributes(chart_bg);

    // coordinate plane setup
    KDChart::AbstractCoordinatePlane *plane1 = chart.coordinatePlane();
    plane1->setRubberBandZoomingEnabled(true);

    // create cartesian diagrams
    auto *plotter = new KDChart::Plotter;
    plotter->setHidden(0, true);