Wt

Hi!

It seems like putting a NaN at the begining or at the end of a dataseries causes an infinite loop.

See example below to recreate.

BR, Ulf.

class Application : public Wt::WApplication
{
public:
    Application (const Wt::WEnvironment &enviorment) : Wt::WApplication(enviorment) {}

    class GraphModel : public Wt::Chart::WAbstractChartModel
    {
    public:
        GraphModel(Wt::WObject *parent = 0)
        {
            m_data[0].v1 = std::numeric_limits<double>::quiet_NaN(); m_data[0].v2 = 1.0;
            m_data[1].v1 = 1.0; m_data[1].v2 = 1.0;
            m_data[2].v1 = 2.0; m_data[2].v2 = 2;
            m_data[3].v1 = 3.0; m_data[3].v2 = 1.0;
            m_data[4].v1 = 4.0; m_data[4].v2 = 1.0; // if m_data[4].v1 = NaN the same thing occurs!
        }

        int columnCount() const override { return 2; }
        int rowCount() const override { return sizeof(m_data)/sizeof(m_data[0]); }

        double data(int row, int column) const override
        {
            if(rowCount() == 0)
                return 0.0;

            if(row < 0 || row >= rowCount())
                return 0.0;

            if(column == 0)
                return m_data[row].v1;

            return m_data[row].v2;
        }

    private:
        struct
        {
            double v1, v2;
        } m_data[5];
    };

    /***************************************************************/
    void initialize()
    {
        WApplication::initialize();

        Wt::Chart::WCartesianChart *chart = new Wt::Chart::WCartesianChart(root());
        chart->setType(Wt::Chart::ScatterPlot);
        chart->resize(500, 500);
        chart->setOnDemandLoadingEnabled(true);
        chart->setAutoLayoutEnabled(true);
        chart->setPanEnabled(true);
        chart->setZoomEnabled(true);
        chart->axis(Wt::Chart::XAxis).setRange(0, 4);
        chart->axis(Wt::Chart::XAxis).setLabelInterval(1);
        chart->axis(Wt::Chart::Y1Axis).setRange(0, 20);
        chart->axis(Wt::Chart::Y1Axis).setMaxZoom(1.0);
        chart->setXSeriesColumn(0);
        chart->show();

        Wt::Chart::WAxis *yA = new Wt::Chart::WAxis;
        chart->addYAxis(yA);
        yA->setVisible(true);
        yA->setRange(0, 4);

        Wt::Chart::WDataSeries *dataSeries = new Wt::Chart::WDataSeries(1, Wt::Chart::LineSeries, yA->yAxisId());
        GraphModel *gm = new GraphModel(chart);
        dataSeries->setModel(gm);
        chart->addSeries(dataSeries);
    }
};