import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 * 
 */

/**
 * @author barbaralerner
 *
 */
public class Hello implements ActionListener{
	

	private JLabel label;
	private JButton countButton;
	private JButton multiplyButton;
	private int counter = 0;


	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new Hello();
	}
	
	public Hello() {
		JFrame frame = new JFrame();
		Container contentPane = frame.getContentPane();
		label = new JLabel("Hello");
		contentPane.add(label, BorderLayout.CENTER);
		
		JPanel buttonPanel = new JPanel();
		countButton = new JButton ("Count");
		buttonPanel.add(countButton);
		contentPane.add(buttonPanel, BorderLayout.SOUTH);
		countButton.addActionListener (this); 
		multiplyButton = new JButton ("Multiply");
		buttonPanel.add(multiplyButton);
		contentPane.add(buttonPanel, BorderLayout.SOUTH);
		multiplyButton.addActionListener (this); 
		
		final JSlider sizeSlider = new JSlider(JSlider.HORIZONTAL);
		contentPane.add (sizeSlider, BorderLayout.NORTH);
		sizeSlider.addChangeListener(new ChangeListener() {

			public void stateChanged(ChangeEvent arg0) {
				label.setFont(label.getFont().deriveFont((float) sizeSlider.getValue()));				
			}
			
		});
		
		frame.setSize(new Dimension (200, 200));
		frame.setVisible(true);
		new Thread(new Controller()).start();
	}
	
	public synchronized void actionPerformed(ActionEvent event) {
		if (event.getSource() == countButton) {
			counter++;
		}
		else {
			counter = counter * 2;
		}
		notify();
		label.setText("" + counter);
	}
			
	private synchronized void countTo10() {
		while (counter < 10) {
			try {
				wait();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	private synchronized void multiplyTo1000() {
		while (counter < 1000) {
			try {
				wait();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	class Controller implements Runnable {
		public void run() {
			multiplyButton.setEnabled(false);
			countTo10();
			countButton.setEnabled(false);
			multiplyButton.setEnabled(true);
			multiplyTo1000();
			multiplyButton.setEnabled(false);
		}
	}

}