Obtener área o elementos en Scatterplot ampliado

Question

Tengo el siguiente problema. Quiero acercar un Diagrama de dispersión y luego seleccionar todos los elementos mostrados.

Sería suficiente para obtener de alguna manera el área mostrada en el Scatterplot ampliado. Desde el alcance de esta área, pude determinar qué elementos se muestran en el área y cuáles no.

\ edit: encontrado la solución (de aplicación AxisChangeListener Interface)

import java.awt.Color; 
import java.awt.Dimension; 

import org.jfree.chart.ChartPanel; 
import org.jfree.chart.event.AxisChangeEvent; 
import org.jfree.chart.event.AxisChangeListener; 
import org.jfree.chart.plot.PlotOrientation; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.data.xy.XYSeries; 
import org.jfree.data.xy.XYSeriesCollection; 
import org.jfree.ui.ApplicationFrame; 
import org.jfree.ui.RefineryUtilities; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.JFreeChart; 


public class ScatterExample extends ApplicationFrame implements AxisChangeListener { 
/** 
* Creates a new demo instance. 
* @param title the frame title. 
*/ 

private XYSeriesCollection dataset; 
private JFreeChart chart; 


public ScatterExample(String title) { 
    super(title); 

    dataset = createSampleXYDataset(); 

    chart = ChartFactory.createScatterPlot(
      "Scatterplot Demo", // chart title 
      "X", // domain axis label 
      "Y", // range axis label 
      dataset, // data 
      PlotOrientation.VERTICAL, // orientation 
      true, // include legend 
      true, // tooltips? 
      false // URLs? 

    ); 
    //customize chart 
    chart.setBackgroundPaint(Color.white); 
    XYPlot plot = chart.getXYPlot(); 
    plot.setBackgroundPaint(Color.lightGray); 
    plot.setRangeGridlinePaint(Color.white); 

    plot.getRangeAxis().setRange(0.0, 10.0); 
    plot.getRangeAxis().addChangeListener(this); 
    plot.getDomainAxis().setRange(0.0, 10.0); 
    plot.getDomainAxis().addChangeListener(this); 

    ChartPanel chartPanel = new ChartPanel(chart, false); 
    chartPanel.setPreferredSize(new Dimension(500, 500)); 
    setContentPane(chartPanel); 
} 

private XYSeriesCollection createSampleXYDataset() { 
    XYSeriesCollection d = new XYSeriesCollection(); 
    XYSeries ser = new XYSeries("Series 1"); 
    XYSeries ser2 = new XYSeries("Series 2"); 

    ser.add(1.0,2.0); 
    ser.add(2.0,2.0); 
    ser2.add(3.0,2.0); 
    ser.add(3.0,3.0); 
    ser2.add(2.0,5.0); 
    ser.add(1.0,2.0); 
    ser.add(3.0,7.0); 
    ser2.add(4.0,4.0); 

    d.addSeries(ser); 
    d.addSeries(ser2); 

    return d; 
} 

/** 
* Starting point for the demonstration application. 
* @param args ignored. 
*/ 

public static void main(String[] args) { 
    ScatterExample demo = new ScatterExample("Scatterplot Demo"); 
    demo.pack(); 
    RefineryUtilities.centerFrameOnScreen(demo); 
    demo.setVisible(true); 
} 

@Override 
public void axisChanged(AxisChangeEvent event) { 
    if (event.getAxis().equals(chart.getXYPlot().getRangeAxis())){ 
     double rangeLow = chart.getXYPlot().getRangeAxis().getLowerBound(); 
     double rangeUp = chart.getXYPlot().getRangeAxis().getUpperBound(); 

     System.out.println("RangeAxis new range from "+rangeLow+" to "+rangeUp); 
    } 
    else { 
     if (event.getAxis().equals(chart.getXYPlot().getDomainAxis())){ 
      double domainLow = chart.getXYPlot().getDomainAxis().getLowerBound(); 
      double domainUp = chart.getXYPlot().getDomainAxis().getUpperBound(); 

      System.out.println("DomainAxis new range from "+domainLow+" to "+domainUp); 
     } 
    } 
} 
} 

Answer 1

El cartel encontró una solución a este por por tener la clase ScatterExample heredar la interfaz AxisChangeListener:

public class ScatterExample extends ApplicationFrame implements AxisChangeListener { 
/** 
* Creates a new demo instance. 
* @param title the frame title. 
*/ 

private XYSeriesCollection dataset; 
private JFreeChart chart; 


public ScatterExample(String title) { 
    super(title); 

    dataset = createSampleXYDataset(); 

    chart = ChartFactory.createScatterPlot(
      "Scatterplot Demo", // chart title 
      "X", // domain axis label 
      "Y", // range axis label 
      dataset, // data 
      PlotOrientation.VERTICAL, // orientation 
      true, // include legend 
      true, // tooltips? 
      false // URLs? 

    ); 
    //customize chart 
    chart.setBackgroundPaint(Color.white); 
    XYPlot plot = chart.getXYPlot(); 
    plot.setBackgroundPaint(Color.lightGray); 
    plot.setRangeGridlinePaint(Color.white); 

    plot.getRangeAxis().setRange(0.0, 10.0); 
    plot.getRangeAxis().addChangeListener(this); 
    plot.getDomainAxis().setRange(0.0, 10.0); 
    plot.getDomainAxis().addChangeListener(this); 

    ChartPanel chartPanel = new ChartPanel(chart, false); 
    chartPanel.setPreferredSize(new Dimension(500, 500)); 
    setContentPane(chartPanel); 
} 

private XYSeriesCollection createSampleXYDataset() { 
    XYSeriesCollection d = new XYSeriesCollection(); 
    XYSeries ser = new XYSeries("Series 1"); 
    XYSeries ser2 = new XYSeries("Series 2"); 

    ser.add(1.0,2.0); 
    ser.add(2.0,2.0); 
    ser2.add(3.0,2.0); 
    ser.add(3.0,3.0); 
    ser2.add(2.0,5.0); 
    ser.add(1.0,2.0); 
    ser.add(3.0,7.0); 
    ser2.add(4.0,4.0); 

    d.addSeries(ser); 
    d.addSeries(ser2); 

    return d; 
} 

/** 
* Starting point for the demonstration application. 
* @param args ignored. 
*/ 

public static void main(String[] args) { 
    ScatterExample demo = new ScatterExample("Scatterplot Demo"); 
    demo.pack(); 
    RefineryUtilities.centerFrameOnScreen(demo); 
    demo.setVisible(true); 
} 

@Override 
public void axisChanged(AxisChangeEvent event) { 
    if (event.getAxis().equals(chart.getXYPlot().getRangeAxis())){ 
     double rangeLow = chart.getXYPlot().getRangeAxis().getLowerBound(); 
     double rangeUp = chart.getXYPlot().getRangeAxis().getUpperBound(); 

     System.out.println("RangeAxis new range from "+rangeLow+" to "+rangeUp); 
    } 
    else { 
     if (event.getAxis().equals(chart.getXYPlot().getDomainAxis())){ 
      double domainLow = chart.getXYPlot().getDomainAxis().getLowerBound(); 
      double domainUp = chart.getXYPlot().getDomainAxis().getUpperBound(); 

      System.out.println("DomainAxis new range from "+domainLow+" to "+domainUp); 
     } 
    } 
} 
}