// A class (called VCThree) that acts as a controller as well as a viewer.
// Barry Cornelius, 19 June 2000
import java.awt.event. ActionEvent;
import java.awt.event. ActionListener;
import javax.swing.    Box;
import javax.swing.    BoxLayout;
import javax.swing.    JButton;
import javax.swing.    JLabel;
import java.util.      Observable;
import java.util.      Observer;
public class VCThree implements ActionListener, Observer
{
   private Model iModel;
   private JButton iJButton;
   private JLabel iJLabel;
   public VCThree(final Model pModel)
   {
      iModel = pModel;
      iJButton = new JButton("increment");
      iJLabel = new JLabel("unset");
      iJButton.addActionListener(this);
   }
   public Box getGUI()
   {
      final Box tBox = new Box(BoxLayout.Y_AXIS);
      tBox.add(iJButton);
      tBox.add(iJLabel);
      return tBox;
   }
   public void actionPerformed(final ActionEvent pActionEvent)
   {
      iModel.inc();
   }
   public void update(final Observable pObservable, final Object pObject)
   {
      iJLabel.setText("" + iModel.get());
   }
}