Add new QLineSeries to existing chart

MScottM

This is my function:

/********************* populate the graph ***********************/
void MainWindow::graphSelected(QStringList _graphingData, QString sensorName) {
   
    QList<QStringList> list;
    int x = 0;
    foreach (const QString &s, _graphingData) {
        const QStringList parts = s.split(",");
        list.append(parts);
        Q_ASSERT(parts.size() >= 3);
        double y = parts.at(2).toDouble();
        x+=1;
        series->append(x,y);
        if  (Debug){
            qDebug() << x << y;
        }
    }    

    series->setName(sensorName);
    chart->addSeries(series);
    chart->setAnimationOptions(QChart::SeriesAnimations);
    chart->createDefaultAxes();
    chart->legend()->setAlignment(Qt::AlignBottom);
    chartView->setRenderHint(QPainter::Antialiasing);

    QWidget *chartWindow = new QWidget;
    QVBoxLayout *layout = new QVBoxLayout(chartWindow);

    chartWindow->resize(480,320);
    chartWindow->grabGesture(Qt::PanGesture);
    chartWindow->grabGesture(Qt::PinchGesture);
    layout->addWidget(chartView);
    chartWindow->setLayout(layout);
    layout->activate();
    chartWindow->show();

    if (Debug){
        qDebug()<<"showed chartwindow";

    }
}

that takes some data that is extracted in a different function and charts it on a QWidget. I've been struggling with how to then select a new set of data for comparison, and EITHER put the new data set (QLinesSeries) on the same chart OR put it on a new chart above the previous one in the QVBoxLayout on the same QWidget.

What happens now is the new data is put in a new Widget (the old one goes blank and stays in the background. I've looked for ways to try and make the function aware that there is already a QWidget, or QVBoxLayout, etc, but I haven't been able to figure anything out!

As always, I'm happy to do the legwork if someone can point me in the right direction!!

Oh - in case it matters, 'chart' is from a class that extends QChart, and 'chartView' from a class that extends QChartView - giving zoom and pan functionality.

Best regards,
Scott

MScottM

Sorry to bump this, but it seems like it should be easy to add a series to an existing graph. If it's something obvious, I haven't figured it out in a week of searching and experimenting. Also, I'm having a problem with a QDialog - I'll start a new question...