I'm trying to plot data in a QLabel widget using bar chart format. After the chart is created, I capture it using chartView->grab() for insertion into the QLabel. This approach works with a pie chart, but for a bar chart the child elements (QBarSeries and QBarSet) are not displayed.
The code is as follows:
QT_CHARTS_USE_NAMESPACE
QChartView* chartView = new QChartView();
chartView->setRenderHint(QPainter::Antialiasing);
QChart* chart = chartView->chart();
QBarSeries *series = new QBarSeries();
QBarCategoryAxis *categories = new QBarCategoryAxis();
QBarSet *set0 = new QBarSet("test");
set0->setBrush(Qt::blue);
for (int i = 0; i < 20; ++i) {
set0->append(static_cast<double>(10-std::abs(10-i)));
categories->append(QString::number(i));
}
series->append(set0);
chart->addSeries(series);
chart->setAnimationOptions(QChart::SeriesAnimations);
chart->setTitle("Plot Test");
chart->setAxisX(categories, series);
chart->createDefaultAxes();
chart->legend()->setVisible(true);
chart->legend()->setAlignment(Qt::AlignBottom);
*m_chart = chartView->grab();
This is the displayed image.
If instead, I do:
chartView->show();
A window pops up with QBarSeries data included. Any ideas on why the grab() method is not capturing the child elements?
