JavaFX Use Chart Legend to toggle show/hide Series possible?

Question

Is it possible to use a chart\'s legend to toggle show/hide a series?

I got a LineChart with a legend and there are too many Series so you

Answer 1

For reference, a similar approach works with JFreeChart in JavaFX as shown here. Adapted from this example, the variation below adds a ChartMouseListenerFX to the ChartViewer. Click on a series or its legend item to make a series invisible; click anywhere else to restore it.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.entity.ChartEntity;
import org.jfree.chart.entity.LegendItemEntity;
import org.jfree.chart.entity.XYItemEntity;
import org.jfree.chart.fx.ChartViewer;
import org.jfree.chart.fx.interaction.ChartMouseEventFX;
import org.jfree.chart.fx.interaction.ChartMouseListenerFX;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 * @see https://stackoverflow.com/a/44967809/230513
 * @see https://stackoverflow.com/a/43286042/230513
 */
public class VisibleTest extends Application {

    @Override
    public void start(Stage stage) {
        XYSeriesCollection dataset = new XYSeriesCollection();
        for (int i = 0; i < 3; i++) {
            XYSeries series = new XYSeries("value" + i);
            for (double t = 0; t < 2 * Math.PI; t += 0.5) {
                series.add(t, Math.sin(t) + i);
            }
            dataset.addSeries(series);
        }
        NumberAxis xAxis = new NumberAxis("domain");
        NumberAxis yAxis = new NumberAxis("range");
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, true);
        renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
        XYPlot plot = new XYPlot(dataset, xAxis, yAxis, renderer);
        JFreeChart chart = new JFreeChart("Test", plot);
        ChartViewer viewer = new ChartViewer(chart);
        viewer.addChartMouseListener(new ChartMouseListenerFX() {
            @Override
            public void chartMouseClicked(ChartMouseEventFX e) {
                ChartEntity ce = e.getEntity();
                if (ce instanceof XYItemEntity) {
                    XYItemEntity item = (XYItemEntity) ce;
                    renderer.setSeriesVisible(item.getSeriesIndex(), false);
                } else if (ce instanceof LegendItemEntity) {
                    LegendItemEntity item = (LegendItemEntity) ce;
                    Comparable key = item.getSeriesKey();
                    renderer.setSeriesVisible(dataset.getSeriesIndex(key), false);
                } else {
                    for (int i = 0; i < dataset.getSeriesCount(); i++) {
                        renderer.setSeriesVisible(i, true);
                    }
                }
            }

            @Override
            public void chartMouseMoved(ChartMouseEventFX e) {}
        });
        stage.setScene(new Scene(viewer));
        stage.setTitle("JFreeChartFX");
        stage.setWidth(640);
        stage.setHeight(480);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}