import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import java.awt.Font;

/*
  Author:  James Tam
  Version: 2015

  Learning objective:
  1) Reacting to a JTextArea events
  2) Adding scrolling capability to a Java component
     (JTextArea).
*/

public class Driver
{
    public static void main(String [] args)
    {
        JFrame frame = new JFrame();
	frame.setSize(400,250);
	JTextArea text = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(text); 
	text.setFont(new Font("Times",Font.BOLD, 32));
	for (int i = 0;i < 10; i++)
	    text.append("foo" + i + "\n");
	frame.add(scrollPane);
	MyDocumentListener listener = new MyDocumentListener();
	(text.getDocument()).addDocumentListener(listener);
	frame.setVisible(true);
	frame.setLayout(null);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
}