How to draw a linechart on click in JFreeChart? - jfreechart

Question

I am able to draw LineChart using JFreeChart. I would like to know how to draw linechart with legends. The place where I click should be dynamaically updated in the JFreeChart.
I have mentioned a image here to explain what I Mean.
In the Image I am able draw the black line what I want is the red line to be drawn on click. Can anybody suggest me something related to this?
Thanks in advance

Answer 1

Here is the sample code. In this I have 3 Series. and I am adding onclick datapoints to second series.
import com.sun.javafx.geom.Point2D;
import com.sun.javafx.scene.paint.GradientUtils.Point;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.geom.Rectangle2D;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
public class ChartDemo extends ApplicationFrame implements ChartMouseListener {
/**
* Creates a new demo.
*
* #param title the frame title.
*/
public static ChartPanel chartPanel = null;
public static JFreeChart chart = null;
public static XYSeries series1,series2;
public ChartDemo(final String title) {
super(title);
final XYDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
chartPanel = new ChartPanel(chart);
chartPanel.addChartMouseListener(this);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
/**
* Creates a sample dataset.
*
* #return a sample dataset.
*/
private XYDataset createDataset() {
series1 = new XYSeries("First");
series1.add(1.0, 1.0);
series1.add(2.0, 4.0);
series1.add(3.0, 3.0);
series1.add(4.0, 5.0);
series1.add(5.0, 5.0);
series1.add(6.0, 7.0);
series1.add(7.0, 7.0);
series1.add(8.0, 8.0);
series2 = new XYSeries("Second");
series2.add(1.0, 5.0);
series2.add(2.0, 7.0);
series2.add(3.0, 6.0);
series2.add(4.0, 8.0);
series2.add(5.0, 4.0);
series2.add(6.0, 4.0);
series2.add(7.0, 2.0);
series2.add(8.0, 1.0);
final XYSeries series3 = new XYSeries("Third");
series3.add(3.0, 4.0);
series3.add(4.0, 3.0);
series3.add(5.0, 2.0);
series3.add(6.0, 3.0);
series3.add(7.0, 6.0);
series3.add(8.0, 3.0);
series3.add(9.0, 4.0);
series3.add(10.0, 3.0);
final XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series1);
dataset.addSeries(series2);
dataset.addSeries(series3);
return dataset;
}
/**
* Creates a chart.
*
* #param dataset the data for the chart.
*
* #return a chart.
*/
private JFreeChart createChart(final XYDataset dataset) {
// create the chart...
chart = ChartFactory.createXYLineChart(
"Chart Demo", // chart title
"X", // x axis label
"Y", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
true, // include legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(Color.white);
final XYPlot plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.lightGray);
// plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
renderer.setSeriesLinesVisible(0, false);//to disable line on the graph
renderer.setSeriesShapesVisible(2, false);//to disable shape on the graph
plot.setRenderer(renderer);
final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
return chart;
}
public static void main(final String[] args)
{
final ChartDemo demo = new ChartDemo("Chart Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
#Override
public void chartMouseClicked(ChartMouseEvent cme)
{
int mouseX = cme.getTrigger().getX();
int mouseY = cme.getTrigger().getY();
System.out.println("x = " + mouseX + ", y = " + mouseY);
java.awt.geom.Point2D p = chartPanel.translateScreenToJava2D(
new java.awt.Point(mouseX, mouseY));
XYPlot plot = (XYPlot) chart.getPlot();
System.out.println("Mouse clicked!!!!!");
Rectangle2D plotArea = this.chartPanel.getChartRenderingInfo().getPlotInfo().getDataArea();
ValueAxis domainAxis = plot.getDomainAxis();
org.jfree.chart.ui.RectangleEdge domainAxisEdge = plot.getDomainAxisEdge();
ValueAxis rangeAxis = plot.getRangeAxis();
org.jfree.chart.ui.RectangleEdge rangeAxisEdge = plot.getRangeAxisEdge();
double chartX = domainAxis.java2DToValue(p.getX(), plotArea,
domainAxisEdge);
double chartY = rangeAxis.java2DToValue(p.getY(), plotArea,
rangeAxisEdge);
System.out.println("Chart: x = " + chartX + ", y = " + chartY);
series2.add(chartX, chartY);
}
#Override
public void chartMouseMoved(ChartMouseEvent cme)
{
if(cme.getTrigger().getButton() == MouseEvent.BUTTON1)
{
}
}
}