/*
 * OptionButton.java -  Option button controls.
 *
 * Copyright (c) 1996 Chuck McManis, All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies.
 *
 * CHUCK MCMANIS MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE
 * SUITABILITY OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. CHUCK MCMANIS
 * SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT
 * OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */

import java.applet.Applet;
import java.awt.*;
import java.util.Random;
import java.util.Vector;
import util.comm.*;

/**
 * This class implements a simple exclusive choice control. It uses
 * the data channel to determine if it should be off or on.
 */
public class OptionButton extends VJApplet implements Runnable {
    Thread updater = null;
    DataChannel rr = null;

    Vector dc = new Vector();

    Font labelFont = new Font("helvetica", Font.BOLD, 14);
    String myLabel = null;

    Dimension mySize = new Dimension(0, 0);
    int myID;
    String myGroup;

    boolean currentState = false;

    public Dimension preferredSize() { return mySize; }

    /**
     * Parse a option message to send off on select
     * Format is "DataChannelName:<message>"
     */
    OptionMessage parseOption(String op) {
    	String chan = op.substring(0, op.indexOf(':'));
    	String msg = op.substring(op.indexOf(':')+1);

    	System.out.println("Message parsed was '"+chan+"' and '"+msg+"'");
    	return new OptionMessage(chan, msg);
    }

    public void init() {
    	String x;

        super.init();

	    System.out.println("OptionButton:: init.");
	    myLabel = getParameter("label");

	    x = getParameter("id");
	    if (x == null) {
	        System.out.println("MISSING ID, which is required.");
	        myID = -1;
	    } else {
	        try {
	            myID = Integer.parseInt(x);
	        } catch (NumberFormatException ne) {
		        System.out.println("Non-integer ID.");
		        myID = -2;
	        }
 	    }

	    myGroup = getParameter("group");
	    if (myGroup == null)
	        myGroup = "default";

    	for (int i=0; true; i++) {
	        String ts = getParameter("msg"+i);
	        if (ts == null)
	            break;
	        OptionMessage om = parseOption(ts);
	        if (x != null)
	            dc.addElement(om);
	    }
    }


    void drawX(Graphics g) {
    	g.setColor(Color.black);
    	g.drawLine(3, 3, 9, 9);
    	g.drawLine(3, 4, 8, 9);
    	g.drawLine(4, 3, 9, 8);
    	g.drawLine(3, 9, 9, 3);
    	g.drawLine(4, 9, 9, 4);
    	g.drawLine(3, 8, 8, 3);
    }

    public void paint(Graphics g) {
    	g.setColor(bgColor);
    	g.fillRect(0, 0, myWidth, myHeight);
	    g.setColor(dkColor);
	    g.drawArc(0, 0, 12, 12, 45, 180);
	    g.drawArc(1, 1, 11, 11, 45, 180);
	    g.setColor(brColor);
	    g.drawArc(0, 0, 12, 12, 45, -180);
	    g.drawArc(1, 1, 11, 11, 45, -180);
	    if (currentState)
	        drawX(offscreen);
	    g.setColor(Color.black);
	    if (myLabel != null)
	        g.drawString(myLabel, 15, 10);
    }

    public void start() {
	    updater = new Thread(this);
	    updater.setName("OptionButton Thread");

        rr = DataChannel.getChannel(myGroup, updater, 1);
	    updater.start();
    }

    public void stop() {
	    updater = null;
    }

    public void run() {
	    while (Thread.currentThread() == updater) {
	        repaint();
	        try {
		        int press;
	            press = ((Integer) rr.getValue()).intValue();
		        currentState = (press == myID);
	        } catch (DataChannelOverrun e) {
		        System.out.println("OptionButton : OVERRUN!");
	        } catch (DataChannelException ee) {
		        System.out.println("We're dead.");
		        ee.printStackTrace();
	        }
	        if (currentState && (dc.size() > 0)) {
	    	    for (int i = 0; i < dc.size(); i++) {
	    	        ((OptionMessage)(dc.elementAt(i))).send();
	    	    }
	        }
	    }
    }

    public boolean mouseDown(Event ev, int x, int y) {
    	currentState = true;
	    rr.putValue(new Integer(myID));

        return true;
    }

}

class OptionMessage {
    String msg;
    DataChannel dc;

    public OptionMessage(String c, String m) {
    	dc = DataChannel.getChannel(c);
    	msg = m;
    }

    void send() {
    	dc.putValue(msg);
    }
}