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


class MVCExample extends JFrame {
    
    MVCExample(){
	super();
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	setSize(750, 100);
	setTitle("MVCExample");
	
	JTextField tf1 = new JTextField(10);
	tf1.setFont( new Font("Serif",Font.ITALIC,32) );
	
	final Document document = tf1.getDocument();
	
	JTextField tf2 = new JTextField(document,null,10);
	tf2.setFont( new Font("Serif",Font.BOLD,32) );
	
	DocumentSizeView dsv = new DocumentSizeView( document );
	dsv.setFont( new Font("Serif",Font.PLAIN,32) );
	
	Container c = this.getContentPane();
	c.setLayout(new FlowLayout());
	c.add( tf1 );
	c.add( tf2 );
	c.add( dsv );
	c.add( new DocumentSizeView( document ) );
	
	final Timer timer = new Timer(3000, new ActionListener(){
		public void actionPerformed(ActionEvent e){
		    try{
			document.insertString(0, "*", null);
		    }catch(Exception nono){}
		}
	    });
	timer.setInitialDelay(10000);
	timer.start();
	
	JSlider slider = new JSlider(JSlider.HORIZONTAL, 500, 15000, 3000);
	slider.addChangeListener(new ChangeListener(){
		public void stateChanged(ChangeEvent e) {
		    JSlider source = (JSlider)e.getSource();
		    if (!source.getValueIsAdjusting()) {
			int newDelay = (int)source.getValue();
			timer.setDelay(newDelay);
		    }
		}});
	c.add(slider);
	setVisible(true);
    }
    
    public static void main(String[] a){
	new MVCExample();
    }
}

class DocumentSizeView extends JLabel implements DocumentListener {
    Document d;
    DocumentSizeView(Document d){
	super("");
	this.d = d;
	setText("Size: " + d.getLength() );
	d.addDocumentListener(this);
    }
    
    public void changedUpdate(DocumentEvent e) {}
    public void insertUpdate(DocumentEvent e) {
	setText("Size: " + d.getLength());
    }
    public void removeUpdate(DocumentEvent e){
	setText("Size: " + d.getLength());
    }
}