Method MainWindow

examples/ModelView/HidingData/mainwindow.cpp:25–73

using namespace KDChart;

MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
{
    setupUi(this);

    auto *chartLayout = new QHBoxLayout(chartFrame);
    m_chart = new Chart();
    m_chart->setGlobalLeading(20, 20, 20, 20);
    chartLayout->addWidget(m_chart);

    // Initialize the model, and fill it with data
    const int rowCount = 8;
    const int columnCount = 3;
    m_model = new QStandardItemModel(rowCount, columnCount, this);
    m_model->setHeaderData(0, Qt::Horizontal, tr("Product A"));
    m_model->setHeaderData(1, Qt::Horizontal, tr("Product B"));
    m_model->setHeaderData(2, Qt::Horizontal, tr("Product C"));
    openFile(":/Charts/qtdata.cht");

    // Set up the diagram
    m_lines = new LineDiagram();
    // Register the data model at the diagram
    m_lines->setModel(m_model);
    // Add axes to the diagram
    auto *xAxis = new CartesianAxis(m_lines);
    auto *yAxis = new CartesianAxis(m_lines);
    xAxis->setPosition(KDChart::CartesianAxis::Bottom);
    yAxis->setPosition(KDChart::CartesianAxis::Left);
    m_lines->addAxis(xAxis);
    m_lines->addAxis(yAxis);
    // Make the lines thicker
    for (int iColumn = 0; iColumn < columnCount; ++iColumn) {
        QPen linePen(m_lines->pen(iColumn));
        linePen.setWidth(3);
        m_lines->setPen(iColumn, linePen);
    }
    // Register the diagram at the coordinate plane
    m_chart->coordinatePlane()->replaceDiagram(m_lines);

    // Add a legend
    auto *legend = new Legend(m_lines, m_chart);
    legend->setPosition(Position::South);
    legend->setAlignment(Qt::AlignCenter);
    legend->setShowLines(true);
    legend->setTitleText("");
    legend->setOrientation(Qt::Horizontal);
    legend->addDiagram(m_lines);
    m_chart->addLegend(legend);
}

void MainWindow::on_showDataset1CB_toggled(bool checked)
{