/*
	DiningPhilosophers.java - the classic problem
	Written by Robert Sheehan
	01/09/97
*/

import java.awt.*;

public class DiningPhilosophers extends Frame {
	
	public final static int NUMBER = 5;
	
	private ThreadGroup allPhilosophers;

	public DiningPhilosophers() {
		ForkControl controller;
		Philosopher philosopher;
		SafeTextArea philosopherText;
		Panel textPanel;
		Panel buttonPanel;
		Button goButton;
		Button stopButton;

		resize(800, 400);									// set the Frame size
		setTitle("Dining Philosophers");	// set the title
		setLayout(new FlowLayout());			// method of laying out Frame contents
		textPanel = new Panel();
		add("Center", textPanel);
		buttonPanel = new Panel();
		goButton = new Button("Go");
		stopButton = new Button ("Stop");
		buttonPanel.add(goButton);
		buttonPanel.add(stopButton);
		add("South", buttonPanel);

		controller = new ForkControl();

		allPhilosophers = new ThreadGroup("Philosophers");
		for (int i = 0; i < NUMBER; i++) {
			philosopherText = new SafeTextArea(21, 15);
			textPanel.add(philosopherText);
			philosopher = new Philosopher(allPhilosophers, String.valueOf(i), philosopherText, controller);
			philosopherText.setText("Philosopher " + philosopher.getName());
			philosopher.start();
		}
	}
	
	// JDK 1.0.2 event handling at the moment
	public boolean action(Event event, Object what) {
		if (what.equals("Go"))
			allPhilosophers.resume();
		if (what.equals("Stop"))
			allPhilosophers.suspend();
		return true;
	}
	
	public boolean handleEvent(Event event) {
		if (event.id == Event.WINDOW_DESTROY) {
	    hide();
	    dispose(); 
	    System.exit(0);
	    return true;
		}
		return super.handleEvent(event);
	}
	
	// the program starts here
	public static void main(String[] args) {
		(new DiningPhilosophers()).show();	// construct the Frame and show it
	}

}