[JFreeChart] Positionner l'axe des ordonnées
Bonjour,
J'ai un graphique dynamique auquel je voudrais imposer une valeur minimale dans l'axe des ordonnées en ayant l'autoRange à true car je ne connais pas la valeur maximale.
Voici un morceau du code:
Code:
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| final NumberAxis rangeAxis = new NumberAxis("Y");
rangeAxis.setAutoRange(true); |
la méthode setrange(double,double); m'impose une valeur maximum et de plus elle désactive mon autoRange.
Est il possible de fixer la valeur minimal de mon axe des ordonnées en gardant l'autoRange active?
Une alternative serait de mettre une marge inférieur mais lorsque j'utilise la méthode setLowerMargin(double) rien ne se passe. Idem avec la méthode setLowerBound(double).
Voici le code source duquel je me suis inspiré:
Code:
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| /*
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
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.axis.ValueAxis;
import org.jfree.chart.plot.CombinedDomainXYPlot;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A demonstration application showing a time series chart where you can dynamically add (random) data by clicking on a
* button.
*
*/
public class DynamicDataDemo3 extends ApplicationFrame implements ActionListener {
int cpt = 0;
/** The number of subplots. */
public static final int SUBPLOT_COUNT = 3;
/** The datasets. */
private TimeSeriesCollection[] datasets;
/** The most recent value added to series 1. */
private double[] lastValue = new double[SUBPLOT_COUNT];
/**
* Constructs a new demonstration application.
*
* @param title
* the frame title.
*/
public DynamicDataDemo3(final String title) {
super(title);
final CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time"));
this.datasets = new TimeSeriesCollection[SUBPLOT_COUNT];
for (int i = 0; i < SUBPLOT_COUNT; i++) {
this.lastValue[i] = 100.0;
final TimeSeries series = new TimeSeries("Random " + i, Millisecond.class);
this.datasets[i] = new TimeSeriesCollection(series);
final NumberAxis rangeAxis = new NumberAxis("Y" + i);
rangeAxis.setLowerBound(-1);
// rangeAxis.setAutoRange(true);
final XYPlot subplot = new XYPlot(this.datasets[i], null, rangeAxis, new StandardXYItemRenderer());
subplot.setBackgroundPaint(Color.lightGray);
subplot.setDomainGridlinePaint(Color.white);
subplot.setRangeGridlinePaint(Color.white);
plot.add(subplot);
}
final JFreeChart chart = new JFreeChart("Dynamic Data Demo 3", plot);
// chart.getLegend().setAnchor(Legend.EAST);
chart.setBorderPaint(Color.black);
chart.setBorderVisible(true);
chart.setBackgroundPaint(Color.white);
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
// plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 4, 4, 4, 4));
final ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
axis.setFixedAutoRange(60000.0); // 60 seconds
final JPanel content = new JPanel(new BorderLayout());
final ChartPanel chartPanel = new ChartPanel(chart);
content.add(chartPanel);
final JPanel buttonPanel = new JPanel(new FlowLayout());
for (int i = 0; i < SUBPLOT_COUNT; i++) {
final JButton button = new JButton("Series " + i);
button.setActionCommand("ADD_DATA_" + i);
button.addActionListener(this);
buttonPanel.add(button);
}
final JButton buttonAll = new JButton("ALL");
buttonAll.setActionCommand("ADD_ALL");
buttonAll.addActionListener(this);
buttonPanel.add(buttonAll);
content.add(buttonPanel, BorderLayout.SOUTH);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 470));
chartPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
setContentPane(content);
}
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.com/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************
/**
* Handles a click on the button by adding new (random) data.
*
* @param e
* the action event.
*/
public void actionPerformed(final ActionEvent e) {
for (int i = 0; i < SUBPLOT_COUNT; i++) {
if (e.getActionCommand().endsWith(String.valueOf(i))) {
final Millisecond now = new Millisecond();
System.out.println("Now = " + now.toString());
this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random());
this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]);
}
}
if (e.getActionCommand().equals("ADD_ALL")) {
final Millisecond now = new Millisecond();
System.out.println("Now = " + now.toString());
for (int i = 0; i < SUBPLOT_COUNT; i++) {
// this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random());
cpt++;
if (cpt == 10) {
this.lastValue[i] = 5;
cpt = 0;
} else
this.lastValue[i] = 0;
this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]);
}
}
}
/**
* Starting point for the demonstration application.
*
* @param args
* ignored.
*/
public static void main(final String[] args) {
final DynamicDataDemo3 demo = new DynamicDataDemo3("Dynamic Data Demo 3");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
} |
