import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import fr.esrf.tangoatk.widget.util.chart.*;


public class ChartExample4 extends JFrame implements IJLChartListener {

  final JLDataView yData;

  public ChartExample4() {

    final JLChart chart = new JLChart();
    final int nbValue=50;

    // Initialise chart properties
    chart.setHeaderFont(new Font("Times", Font.BOLD, 18));
    chart.setHeader("Spectrum Monitoring");
    chart.setJLChartListener(this); // To customize the value popup

    // Initialise axis properties
    chart.getY1Axis().setName("dB");
    chart.getY1Axis().setAutoScale(true);

    chart.getXAxis().setAutoScale(true);
    chart.getXAxis().setName("Frequency (Hz)");
    chart.getXAxis().setAnnotation(JLAxis.VALUE_ANNO);

    // Build dataviews

    yData=new JLDataView();
    yData.setName("Amplitude");
    yData.setUnit("dB");
    yData.setColor(new Color(200,0,0));
    yData.setLineWidth(2);

    chart.getY1Axis().addDataView(yData);

    // Update thread

    new Thread() {
      public void run() {
        while( true ) {

	  yData.reset();

	  for(int i=0;i < nbValue;i++) {
	    double v = 2*Math.PI*( (double)i/20.0  );
	    yData.add( (double)i*50.0 ,
	                Math.abs(
			  Math.sin(v)*
			  Math.exp(-(double)i/10.0)*
			  (1.0 + Math.random()/5.0) )
		      );
	  }

	  // Commit change
	  chart.repaint();

          try {
            Thread.sleep(1000);
          } catch (InterruptedException e) {
          }

        }
      }
    }.start();

    // GUI

    JPanel bot = new JPanel();
    bot.setLayout(new FlowLayout());

    JButton b = new JButton("Exit");
    b.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        System.exit(0);
      }
    });

    bot.add(b);

    JButton c = new JButton("Graph options");
    c.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        chart.showOptionDialog();
      }
    });

    bot.add(c);

    getContentPane().setLayout(new BorderLayout());
    getContentPane().add(chart, BorderLayout.CENTER);
    getContentPane().add(bot, BorderLayout.SOUTH);

    setSize(640,480);
    setTitle("Chart Example 4");
    setVisible(true);

  }

  // Customize the value popup
  public String[] clickOnChart(JLChartEvent e) {
     String[] ret = new String[2];
     ret[0] = "Frequency= " + e.getTransformedXValue() + " Hz";
     ret[1] = "Amplitude= " + e.getTransformedYValue() + " " + yData.getUnit();
     return ret;
  }

  public static void main(String[] args) {
    final ChartExample4 f = new ChartExample4();
  }


}