¿Cómo puedo actualizar el aspecto de un JFreeChart después de que se haya hecho visible?

Question

¿Cómo puedo usar JFreeChart para actualizar dinámicamente la apariencia de un gráfico después de que se ha hecho visible?

Answer 1

La clase ChartPanel es conveniente para esto, ya que tiene métodos para controlar el aspecto general del gráfico, incluidas las propiedades y el estado del zoom. Además, también es posible acceder a los componentes del gráfico, como se muestra a continuación.

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.text.NumberFormat; 
import javax.swing.AbstractAction; 
import javax.swing.DefaultComboBoxModel; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.axis.DateAxis; 
import org.jfree.chart.axis.NumberAxis; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; 
import org.jfree.data.time.TimeSeries; 
import org.jfree.data.time.TimeSeriesCollection; 
import org.jfree.data.time.Year; 
import org.jfree.data.xy.XYDataset; 

/** @see http://stackoverflow.com/questions/5522575 */ 
public class ChartPanelDemo { 

    private static final String title = "Return On Investment"; 
    private ChartPanel chartPanel = createChart(); 

    public ChartPanelDemo() { 
     JFrame f = new JFrame(title); 
     f.setTitle(title); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.setLayout(new BorderLayout(0, 5)); 
     f.add(chartPanel, BorderLayout.CENTER); 
     chartPanel.setMouseWheelEnabled(true); 
     chartPanel.setHorizontalAxisTrace(true); 
     chartPanel.setVerticalAxisTrace(true); 

     JPanel panel = new JPanel(new FlowLayout(FlowLayout.RIGHT)); 
     panel.add(createTrace()); 
     panel.add(createDate()); 
     panel.add(createZoom()); 
     f.add(panel, BorderLayout.SOUTH); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

    private JComboBox createTrace() { 
     final JComboBox trace = new JComboBox(); 
     final String[] traceCmds = {"Enable Trace", "Disable Trace"}; 
     trace.setModel(new DefaultComboBoxModel(traceCmds)); 
     trace.addActionListener(new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       if (traceCmds[0].equals(trace.getSelectedItem())) { 
        chartPanel.setHorizontalAxisTrace(true); 
        chartPanel.setVerticalAxisTrace(true); 
        chartPanel.repaint(); 
       } else { 
        chartPanel.setHorizontalAxisTrace(false); 
        chartPanel.setVerticalAxisTrace(false); 
        chartPanel.repaint(); 
       } 
      } 
     }); 
     return trace; 
    } 

    private JComboBox createDate() { 
     final JComboBox date = new JComboBox(); 
     final String[] dateCmds = {"Horizontal Dates", "Vertical Dates"}; 
     date.setModel(new DefaultComboBoxModel(dateCmds)); 
     date.addActionListener(new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       JFreeChart chart = chartPanel.getChart(); 
       XYPlot plot = (XYPlot) chart.getPlot(); 
       DateAxis domain = (DateAxis) plot.getDomainAxis(); 
       if (dateCmds[0].equals(date.getSelectedItem())) { 
        domain.setVerticalTickLabels(false); 
       } else { 
        domain.setVerticalTickLabels(true); 
       } 
      } 
     }); 
     return date; 
    } 

    private JButton createZoom() { 
     final JButton auto = new JButton(new AbstractAction("Auto Zoom") { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       chartPanel.restoreAutoBounds(); 
      } 
     }); 
     return auto; 
    } 

    private ChartPanel createChart() { 
     XYDataset roiData = createDataset(); 
     JFreeChart chart = ChartFactory.createTimeSeriesChart(
      title, "Date", "Value", roiData, true, true, false); 
     XYPlot plot = chart.getXYPlot(); 
     XYLineAndShapeRenderer renderer = 
      (XYLineAndShapeRenderer) plot.getRenderer(); 
     renderer.setBaseShapesVisible(true); 
     NumberFormat currency = NumberFormat.getCurrencyInstance(); 
     currency.setMaximumFractionDigits(0); 
     NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); 
     rangeAxis.setNumberFormatOverride(currency); 
     return new ChartPanel(chart); 
    } 

    private XYDataset createDataset() { 
     TimeSeriesCollection tsc = new TimeSeriesCollection(); 
     tsc.addSeries(createSeries("Projected", 200)); 
     tsc.addSeries(createSeries("Actual", 100)); 
     return tsc; 
    } 

    private TimeSeries createSeries(String name, double scale) { 
     TimeSeries series = new TimeSeries(name); 
     for (int i = 0; i < 6; i++) { 
      series.add(new Year(2005 + i), Math.pow(2, i) * scale); 
     } 
     return series; 
    } 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       ChartPanelDemo cpd = new ChartPanelDemo(); 
      } 
     }); 
    } 
}