Comment puis-je mettre à jour un JFreeChart l'apparence après avoir été rendu visible?

La classe ChartPanel est pratique pour cela, car elle a des méthodes pour contrôler le tableau d'ensemble de l'apparence, y compris les propriétés et le zoom de l'état. En outre, il est également possible d'accéder au diagramme de composants, comme indiqué ci-dessous. Cette exemple illustre un JToolBar de boutons de zoom.

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();
}
});
}
}