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    <p>As shown <a href="http://www.jfree.org/jfreechart/api/javadoc/src-html/org/jfree/chart/ChartPanel.html#line.2000" rel="nofollow noreferrer">here</a>, <code>ChartPanel</code> uses the <em>click-drag-release</em> gesture to handle zooming; <code>setMouseZoomable(false)</code> doesn't change that.</p> <p>Working from the suggestion shown <a href="https://stackoverflow.com/a/20085921/230513">here</a>, the complete example below prints the coordinates of any clicked point. I've enlarged the series shape to make it easier to see the effect. In addition, Swing GUI objects should be constructed and manipulated <em>only</em> on the <a href="http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html" rel="nofollow noreferrer">event dispatch thread</a>.</p> <p><img src="https://i.stack.imgur.com/3MRG4.png" alt="image"></p> <pre><code>import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Rectangle; 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.entity.ChartEntity; import org.jfree.chart.entity.XYItemEntity; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.function.Function2D; import org.jfree.data.function.PolynomialFunction2D; import org.jfree.data.general.DatasetUtilities; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; import org.jfree.util.ShapeUtilities; public class ParabolaDemo extends ApplicationFrame { /* * @see https://stackoverflow.com/a/20107935/230513 * @see https://stackoverflow.com/q/20081801/230513 */ public ParabolaDemo(final String title) { super(title); double[] a = {0.0, 0.0, 3.0}; Function2D p = new PolynomialFunction2D(a); XYDataset dataset = DatasetUtilities.sampleFunction2D( p, -20.0, 20.0, 20, "y = 3x² {-20…20}"); final JFreeChart chart = ChartFactory.createXYLineChart("Parabola", "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false); final XYPlot plot = (XYPlot) chart.getPlot(); XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) plot.getRenderer(); r.setBaseShapesVisible(true); r.setSeriesShape(0, ShapeUtilities.createTranslatedShape( new Rectangle(12, 12), -6, -6)); final ChartPanel chartPanel = new ChartPanel(chart) { @Override public Dimension getPreferredSize() { return new Dimension(640, 480); } }; chartPanel.addChartMouseListener(new ChartMouseListener() { @Override public void chartMouseClicked(ChartMouseEvent cme) { report(cme); } @Override public void chartMouseMoved(ChartMouseEvent cme) { //report(cme); } private void report(ChartMouseEvent cme) { ChartEntity ce = cme.getEntity(); if (ce instanceof XYItemEntity) { XYItemEntity e = (XYItemEntity) ce; XYDataset d = e.getDataset(); int s = e.getSeriesIndex(); int i = e.getItem(); System.out.println("X:" + d.getX(s, i) + ", Y:" + d.getY(s, i)); } } }); setContentPane(chartPanel); } public static void main(final String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { final ParabolaDemo demo = new ParabolaDemo("Parabola Demo"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }); } } </code></pre>
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    1. COthanks for code, I wanted a little another. I want to make the editor of polynomials for the program. For example, for parabola creation it is enough to know 3 points (let it is points of p1, p2, p3). We take p1 point, we clamp it and we move on the plane. As p2 and p3 are known, we also can build up again a parabola, knowing new coordinates of a point of p1 and old coordinates of p2 and p3. But it is impossible to learn new coordinates for me for p1 (mouselistener doesn't work when the mouse button is clamped, and the mouse moves on the plane). how it is possible to learn new coordinates?
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    2. COI've not done anything like that with `JFreeChart`, but using an adjacent control may be an option; some examples using `JSlider` are seen [here](http://stackoverflow.com/search?tab=votes&q=user%3a230513%20%5bjfreechart%5d%20jslider).
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    3. COI think you would need to override the mouse motion listener methods in `ChartPanel` with your own.
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