import javax.swing.*;
import java.awt.event.*;
import java.awt.*; 

class World extends JComponent implements ActionListener, KeyListener {
  Timer timer;
  Circle current; 
  Foam foam;  
  World(JLabel statusBar) {
    this.foam = new Foam(statusBar);
    this.timer = new Timer(200, this);     
    this.timer.start();
    this.current = new Circle(this.foam); 
    this.foam.add( this.current ); 
  }
  public void actionPerformed(ActionEvent e) { 
    if (this.current != null) { 
      if (this.current.fall()) {
        
      } else {
        this.foam.clean(); 
        this.current = null; 
        this.timer.setDelay(200);  
      }
    } else {
      if (this.foam.rearranges()) {
        
      } else { 
        this.current = new Circle(this.foam); 
        this.foam.add( this.current ); 
        this.timer.setDelay(200);  
      }
    }
    this.repaint(); 
  }
  public void keyPressed(KeyEvent e) { 
    if (this.current == null) return; 
    if (e.getKeyCode() == KeyEvent.VK_LEFT) {
      this.current.center.x -= 5;  
    } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
      this.current.center.x += 5;  
    } else {
      this.timer.setDelay(20); 
    }
    this.repaint(); 
  }
  public void keyReleased(KeyEvent e) {   }
  public void keyTyped(KeyEvent e) {   }
  public void paintComponent(Graphics g) {
    if (this.current != null) 
      this.current.draw(g); 
    this.foam.draw(g); 
  }
}