import java.awt.*;
import java.awt.event.*;

public class MonoThread extends IcobjWorkspace
{  
  int preys = 50, predators = 2;
  TextField preyInput = new TextField(""+preys);
  TextField predatorInput = new TextField(""+predators);
  protected Thread mainThread;
  boolean started;
  
  public void init(){ 
     super.init();
     Button start = new Button("start");
     start.addMouseListener(new StartAction(this));
     Panel p = new Panel();
     p.setBackground(Color.lightGray);
     setLayout(new BorderLayout());
     p.setLayout(new GridLayout(1, 5, 5, 20));
     add("South", p);	
     p.add(start);
     p.add(new Label("#Preys: ",Label.RIGHT));
     p.add(preyInput);
     p.add(new Label("#Predators: ",Label.RIGHT));
     p.add(predatorInput);
  }
  protected void readParams(){
     try{ 
        preys = Integer.parseInt(preyInput.getText());
        predators = Integer.parseInt(predatorInput.getText());
     }catch(Exception e){}
  }
  protected void go(){
     mainThread = new Thread(this);
     mainThread.start();
  }
  public void startButtonPressed(){
     if (started) return;
     started = true; 
     readParams();
     for(int i=0;i<predators;i++){ addIcobj(new Predator("")); }
     for(int i=0;i<preys;i++){ addIcobj(new Prey("")); }
     go();
  }
  public void stop(){ 
     if (mainThread != null) mainThread.stop(); 
     super.stop();
  }
  
  public void run(){ 
     while(true){ 
        behaviors();
        try{ Thread.sleep(10); }catch(Exception e){}
        update(getGraphics()); 
    } 
  }
}
class StartAction extends MouseAdapter
{
   MonoThread battle;
   public StartAction(MonoThread b){ battle = b; }

   public void mouseClicked(MouseEvent evt){ 
     battle.startButtonPressed(); 
   }
}