/*
 * @(#)AniArea.java	1.7 96/04/24  
 *
 * Copyright (c) 1994-1996 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
 * without fee is hereby granted. 
 * Please refer to the file http://java.sun.com/copy_trademarks.html
 * for further important copyright and trademark information and to
 * http://java.sun.com/licensing.html for further important licensing
 * information for the Java (tm) Technology.
 * 
 * SUN 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. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 * 
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  SUN
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */

import java.awt.Graphics;
import java.util.StringTokenizer;
import java.awt.Image;
import java.net.URL;
import java.net.MalformedURLException;

/**
 * This ImageArea provides for a button that animates when the mouse is
 * over it. The animation is specifed as a base image that contains all
 * of the animation frames and then a series of X,Y coordinate pairs that
 * define the top left corner of each new frame.
 *
 * @author	Chuck McManis
 * @version	1.7, 04/24/96
 */
class AniArea extends ImageMapArea {

    Image sourceImage;
    int	 nFrames;
    int  coords[];
    int	 currentFrame = 0;

    public void handleArg(String s) {
	StringTokenizer st = new StringTokenizer(s, ", ");
	int	i;
        String imgName;

	imgName = st.nextToken();
	try {
	    sourceImage = parent.getImage(new URL(parent.getDocumentBase(),
						  imgName));
	    parent.addImage(sourceImage);
	} catch (MalformedURLException e) {}

	nFrames = 0;
	coords = new int[40];

	while (st.hasMoreTokens()) {
	    coords[nFrames*2]     = Integer.parseInt(st.nextToken());
	    coords[(nFrames*2)+1] = Integer.parseInt(st.nextToken());
	    nFrames++;
	    if (nFrames > 19)
		break;
	}
    }

    public boolean animate() {
	if (entered) {
	    repaint();
	}
	return entered;
    }

    public void enter() {
	currentFrame = 0;
	parent.startAnimation();
    }

    public void highlight(Graphics g) {
	if (entered) {
	    drawImage(g, sourceImage, 
		      X-coords[currentFrame*2], Y-coords[(currentFrame*2)+1],
		      X, Y, W, H);
	    currentFrame++;
	    if (currentFrame >= nFrames)
		currentFrame = 0;
	}
    }
}