动态JFreeChart TimeSeries [英] Dynamic JFreeChart TimeSeries
问题描述
根据此示例，我是
Based on this example, I am now able to collect data and display it in a chart. I don't know exactly how to integrate that code that generates the chart into my application.
/** @see http://stackoverflow.com/questions/5048852 */
public class Atol extends ApplicationFrame {
private static final String TITLE = "Dynamic Series";
private static final String START = "Start";
private static final String STOP = "Stop";
private static final float MINMAX = 100;
private static final int COUNT = 2 * 60;
private static final int FAST = 100;
private static final int SLOW = FAST * 5;
private static final Random random = new Random();
private Timer timer;
public Atol(final String title) {
super(title);
final DynamicTimeSeriesCollection dataset
= new DynamicTimeSeriesCollection(1, COUNT, new Second());
dataset.setTimeBase(new Second(0, 0, 0, 1, 1, 2011));
dataset.addSeries(gaussianData(), 0, "Gaussian data");
JFreeChart chart = createChart(dataset);
final JButton run = new JButton(STOP);
run.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if (STOP.equals(cmd)) {
timer.stop();
run.setText(START);
} else {
timer.start();
run.setText(STOP);
}
}
});
final JComboBox combo = new JComboBox();
combo.addItem("Fast");
combo.addItem("Slow");
combo.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if ("Fast".equals(combo.getSelectedItem())) {
timer.setDelay(FAST);
} else {
timer.setDelay(SLOW);
}
}
});
this.add(new ChartPanel(chart), BorderLayout.CENTER);
JPanel btnPanel = new JPanel(new FlowLayout());
btnPanel.add(run);
btnPanel.add(combo);
this.add(btnPanel, BorderLayout.SOUTH);
SystemInfo si = new SystemInfo(); //Criando uma nova classe de infos do Sistem
HardwareAbstractionLayer hal = si.getHardware(); //Infos de Hardware do sistema
CentralProcessor cpu = hal.getProcessor(); //E as informações da cpu
long[] oldTricks = cpu.getSystemCpuLoadTicks();
timer = new Timer(FAST, new ActionListener() {
float cpu() {
Double stats = cpu.getSystemCpuLoadBetweenTicks(oldTricks);
//Convertendo o valor de uso da CPU
stats = stats * 100d;
double teste = Math.round(stats * 100.0) / 100.0;
double d = teste;
float f = (float) d;
System.out.println(f);
return f;
}
float[] newData = new float[1];
@Override
public void actionPerformed(ActionEvent e) {
newData[0] = cpu();
dataset.advanceTime();
dataset.appendData(newData);
}
});
}
private float[] gaussianData() {
float[] a = new float[COUNT];
for (int i = 0; i < a.length; i++) {
a[i] = 2;
}
return a;
}
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart result = ChartFactory.createTimeSeriesChart(
TITLE, "hh:mm:ss", "milliVolts", dataset, true, true, false);
final XYPlot plot = result.getXYPlot();
ValueAxis domain = plot.getDomainAxis();
domain.setAutoRange(true);
ValueAxis range = plot.getRangeAxis();
range.setRange(-MINMAX, MINMAX);
return result;
}
public void start() {
timer.start();
}
public static void main(final String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
Atol demo = new Atol(TITLE);
demo.pack();
demo.setVisible(true);
demo.start();
}
});
}
}
到我的JFrame代码(在另一个类中):
To my JFrame code (which is in another class):
private void kButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// when I click in that button
Atol demo = new Atol ("");
chartCPU.add(new ChartPanel(demo)); //Thats the JPanel the chart need to appear and readjust to it size
}
如果JFreeChart在一个构造函数中，如何在Atol类中调用该图表(JFreeChart图表)?我没得到！
如何使其显示在我的chartCPU JPanel中? (这是一个称为TelaLogin的JFrame类，与Atol相同).
How can I call the chart (JFreeChart chart) in Atol class if the JFreeChart is in one constructor? I didn't get!
How can I make it appear in my chartCPU JPanel? (which is one JFrame class called TelaLogin, not the same as the Atol one).
推荐答案
您的原始问题询问如何捕获CPU数据并显示在图表中由于相关方法的等待时间短，因此可以在javax.swing.Timer的动作侦听器中调用该方法，如此处所示.及以上.
Your original question asked how to capture CPU data and display it in a chart. Because the relevant method has low latency, it's possible to invoke the method in the action listener of a javax.swing.Timer as shown here and above.
具有不可预测的延迟的数据访问可能会阻塞事件分派线程，在这种情况下，您应该改用SwingWorker，如此处所示.
Data access with unpredictable latency may block the event dispatch thread, in which case you should use a SwingWorker instead, as shown here.
要将图表集成到您的应用程序中，请将示例的构造函数重构为工厂方法，并采用以下方法之一:
To integrate the chart into your application, refactor the example's constructor into a factory method and adopt an approach such as one of these:
-
CardLayout，显示在此处.
JTabbedPane，显示在此处.
