import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Arc2D;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class ThreadTest extends JFrame implements ActionListener
{
  public static final Color WEDGE_COLOR = new Color(40, 145, 240);
  public static final long MOUTH_TIME = 150L;
  public static final int RADIUS = 60;
  public static final double MAX_MOUTH_ANGLE = 125.0;

  private WedgeComponent wedgeComponent;
  private JButton button1;
  private JButton button2;

  public ThreadTest()
  {
    super("Thread Test");

    this.wedgeComponent = new WedgeComponent();
    this.wedgeComponent.setPreferredSize(new Dimension(200, 200));
    JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    this.button1 = new JButton("Button 1");
    this.button1.addActionListener(this);
    this.button2 = new JButton("Button 2");
    this.button2.addActionListener(this);
    buttonPanel.add(this.button1);
    buttonPanel.add(this.button2);
    JPanel allPanel = new JPanel(new BorderLayout());
    allPanel.add(this.wedgeComponent, BorderLayout.CENTER);
    allPanel.add(buttonPanel, BorderLayout.SOUTH);
    setContentPane(allPanel);
    pack();
    new AnimationThread().start();
  }

  public void actionPerformed(ActionEvent event)
  {
    Object source = event.getSource();
    if (source == this.button1)
      button1();
    else if (source == this.button2)
      button2();
  }

  private void button1()
  {
    this.button1.setEnabled(false);
    button1Work();
    this.button1.setEnabled(true);
  }

  private void button1Work()
  {
    try
    {
      Thread.sleep(500L);
    }
    catch (InterruptedException ie) { }
  }

  private void button2()
  {
    this.button2.setEnabled(false);
    button2Work();
    this.button2.setEnabled(true);
  }

  private void button2Work()
  {
    try
    {
      Thread.sleep(1500L);
    }
    catch (InterruptedException ie) { }
  }

  public class WedgeComponent extends JComponent
  {
    private double mouthPhase;

    public void paintComponent(Graphics g)
    {
      Graphics2D g2d = (Graphics2D)g;
      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      this.mouthPhase = (System.currentTimeMillis() % MOUTH_TIME) / (double)MOUTH_TIME;
      double mouthAngle = this.mouthPhase * MAX_MOUTH_ANGLE;
      Arc2D.Double wd = new Arc2D.Double(100 - RADIUS, 100 - RADIUS, 2 * RADIUS,
        2 * RADIUS, mouthAngle / 2, 360.0 - mouthAngle, Arc2D.PIE);
      g2d.setColor(WEDGE_COLOR);
      g2d.fill(wd);
    }
  }

  private class AnimationThread extends Thread
  {
    public void run()
    {
      while (true)
      {
        ThreadTest.this.wedgeComponent.repaint();
        try
        {
          Thread.sleep(25L);
        }
        catch (InterruptedException ie) { }
      }
    }
  }

  public static void main(String[] args)
  {
     ThreadTest f = new ThreadTest();
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     f.setVisible(true);
  }
}