我想压缩并存储我尝试但未成功的实时线图数据
public class DTest extends ApplicationFrame {
javax.swing.Timer _timer;
int nPoints = 200;
float[] history;
/** The most recent value added. */
private float lastValue = (float) 100.0;
DynamicTimeSeriesCollection dataset;
JPanel content;
private final ChartPanel chartPanel;
public DTest(final String title) {
super(title);
history = new float[nPoints];
dataset = new DynamicTimeSeriesCollection(
1, nPoints, new Second()//here speed will set
);
dataset.setTimeBase(new Second(0,0,0,1,1,2000));
dataset.addSeries(new float[]{0.0f}, 0, "S1");
System.out.println("Series count = " + dataset.getSeriesCount());
final JFreeChart chart = createChart(dataset);
chartPanel = new ChartPanel(chart);
content = new JPanel(new FlowLayout());
final JButton btn = new JButton("Stop");
btn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
_timer.stop();
}
});
final JButton btn1 = new JButton("Run");
btn1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// create new dataset and chart, set the new chart in the chartpanel
//createChart(dataset);
_timer.start();
}
});
JComboBox comb = new JComboBox();
comb.addItem("Select");
comb.addItem("Joy Stick");
content.add(chartPanel);//panel for chart
JPanel btnPanel = new JPanel(new FlowLayout());
btnPanel.add(btn);
btnPanel.add(btn1);
btnPanel.add(comb);
Container pane = getContentPane();
pane.setLayout(new BorderLayout());
pane.add(content, BorderLayout.NORTH);
pane.add(btnPanel, BorderLayout.CENTER);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
//setContentPane(content);
comb.addActionListener(new ActionListener() {
private float[] float_array;
private int itemCount;
public void actionPerformed(ActionEvent e) {
JComboBox jComb = (JComboBox) e.getSource();
if (jComb.getSelectedItem().equals("Joy Stick")) {
System.out.println("Joy Stick is Pressed");
try {
float_array = new float[1];
float_array[0] = 0;
itemCount = 0;
dataset.appendData(float_array);
dataset.addSeries(new float[]{0.0f}, 0, "S1");
_timer = new javax.swing.Timer(1, new ActionListener() { // 500ms
private int resizes;
private int inserted;
public void actionPerformed(ActionEvent e) {
double factor = 0.90 + 0.2 * Math.random();
lastValue = lastValue * (float) factor;
float_array[0] = lastValue;
System.out.println("lastValue is " + lastValue);
inserted++;
if ( inserted % (resizes+1)==0 )
dataset.appendData(float_array, itemCount++, 1);
history[itemCount] = lastValue;
if (itemCount >= nPoints - 1) {
resizes++;
DynamicTimeSeriesCollection newSet = new DynamicTimeSeriesCollection(1, nPoints, new Second());
newSet.setTimeBase(new Second(0,0,0,2,2,2000));
newSet.addSeries(new float[]{0.0f}, 0, "S1");
itemCount /= 2;
for (int i = 1; i < nPoints; i++) {
history[i / 2] = history[i];
float_array[0]=history[i / 2];
newSet.appendData(float_array, i/2, 1);
history[i] = 0;
}
chartPanel.setChart(createChart(newSet));
dataset = newSet;
chartPanel.repaint();
}
}
});
_timer.setRepeats(true);
_timer.start();
} catch (NullPointerException ne) {
System.out.println("NullPointer Exception" + ne.toString());
} catch (Exception ex) {
ex.printStackTrace();
}
} else { ;
}
}
});
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart result = ChartFactory.createTimeSeriesChart(
"Dynamic Graph", "Time", "Value", dataset, true, true,
false);
final XYPlot plot = result.getXYPlot();
ValueAxis axis = plot.getDomainAxis();
//plot.setRangeAxis(WIDTH, axi)
axis.setAutoRange(true);
//axis.setFixedAutoRange(60.0); // 60 seconds
axis = plot.getRangeAxis();
axis.setRange(-100.0, 200.0);
return result;
}
public static void main(final String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
final DTest demo = new DTest("Dynamic Graph");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
demo.setVisible(true);
} catch (Exception e) {
}
}
});
}
}