import java.awt.*;
import java.util.*;

public class MiniDrawModel  {
  private Vector<ModelListener> listenerList;
  private ModelListenerIterator listenerListIterator;
  
  // Define Model state variables here (private)
  
  //end of Model state variables
  
  public MiniDrawModel() {
    listenerList = new Vector<ModelListener>(5,1);
    listenerListIterator=new ModelListenerIterator(listenerList);
  }
  
  public void addModelListener (ModelListener listener) {
    listenerList.add(listener);
  }
  
  // public get and set methods for Model State Variables go here
  //set methods must call notifyListeners();
  
  
  // end of public get and set methods
  
  private void notifyListeners() {
     while(listenerListIterator.hasNext()) 
      listenerListIterator.next().ModelUpdated();
  }
  
}