/*
 * @(#)FadeAnim.java	1.20 98/06/29
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package demos.Composite;

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.awt.event.*;
import java.awt.font.TextLayout;
import java.awt.font.FontRenderContext;
import J2DCanvas;


/**
 * Animation of compositing shapes, text and images fading in and out.
 */
public class FadeAnim extends J2DCanvas {

    private double[] xx, yy;
    private Object[] objects;
    private Color colors[] = { Color.blue, Color.cyan, Color.green,
			Color.magenta, Color.orange, Color.pink,
			Color.red, Color.yellow, Color.lightGray,
			Color.white };
    private float alphas[];
    private final int UP = 0;
    private final int DOWN = 1;
    private int alphaDirection[];
    private Image imgs[];
    private int imgN;


    public FadeAnim() {
       	setBackground(Color.black);

	objects = new Object[16];

	objects[0] = getImage("images/jumptojavastrip.gif");
        imgs = new Image[10];
        MediaTracker tracker = new MediaTracker(this);
        for (int i=0, x=0; i < 10; i++, x+=80) {
            CropImageFilter cif = new CropImageFilter(x, 0, 80, 80);
            ImageProducer ip = ((Image) objects[0]).getSource();
            ip = new FilteredImageSource(ip, cif);
            imgs[i] = getToolkit().createImage(ip);
            tracker.addImage(imgs[i], i);
        }
	try {
            tracker.waitForAll();
	} catch (Exception e) { e.printStackTrace(); }

	objects[1] = new Ellipse2D.Float();
	objects[2] = new Rectangle2D.Float();
	objects[3] = new Arc2D.Float();
	objects[4] = null;
	objects[5] = new RoundRectangle2D.Float();
	objects[6] = new Ellipse2D.Float();
	objects[7] = new Rectangle2D.Float();
	objects[8] = null;
	objects[9] = new Arc2D.Float();
	objects[10] = new QuadCurve2D.Float();
	objects[11] = new CubicCurve2D.Float();
	objects[12] = null;
	objects[13] = new RoundRectangle2D.Float();
	objects[14] = getImage("images/duke.gif");
	objects[15] = getImage("images/star7.gif");


	xx = new double[objects.length];
	yy = new double[objects.length];
	alphas = new float[objects.length];
	alphaDirection = new int[objects.length];
	for (int i = 0; i < objects.length; i++) {
	    alphas[i] = (float) Math.random();
	    alphaDirection[i] = ((i%2) == 0) ? UP : DOWN;
	}

	runnable = true;
    }


    public void getRandomXY(int i) {
        if (objects[i] instanceof TextLayout) {
            xx[i] = Math.random() * (w - ((TextLayout) objects[i]).getBounds().getWidth());
	    double y = Math.random() * h;
            yy[i] = (y < ((TextLayout) objects[i]).getAscent()) ? ((TextLayout) objects[i]).getAscent() : y;
        } else if (objects[i] instanceof Image) {
	    xx[i] = Math.random() * (w - ((Image) objects[i]).getWidth(this));
	    yy[i] = Math.random() * (h - ((Image) objects[i]).getHeight(this));
        } else {
            xx[i] = Math.random() * (w -((Shape) objects[i]).getBounds().getWidth());
            yy[i] = Math.random() * (h -((Shape) objects[i]).getBounds().getHeight());
        }
    }


    public void drawDemo(Graphics2D g2) {

	if (newBufferedImage) {
	    FontRenderContext frc = g2.getFontRenderContext();
	    Font f = new Font("Courier", Font.BOLD, 48);
	    objects[4] = new TextLayout("Alpha", f, frc);
	    f = new Font("serif", Font.BOLD + Font.ITALIC, 32);
	    objects[8] = new TextLayout("Composite", f, frc);
	    f = new Font("Helvetica", Font.PLAIN, 32);
	    objects[12] = new TextLayout("Java2D", f, frc);
	    for (int i = 0; i < objects.length; i++ )
	        getRandomXY(i);
	}

	for (int i = 0; i < objects.length; i++) {
	    if (alphaDirection[i] == UP) {
		if ((alphas[i] += 0.05) > .99) {
		    alphaDirection[i] = DOWN;
		    alphas[i] = 1.0f;
		}
	    } else if (alphaDirection[i] == DOWN) {
		if ((alphas[i] -= .05) < 0.01) {
		    alphaDirection[i] = UP;
		    alphas[i] = 0;
		    getRandomXY(i);
		    if (i == 0) imgN = 0;
		}
	    }
            AlphaComposite composite = AlphaComposite.getInstance(
                                   AlphaComposite.SRC_OVER, alphas[i]);
            g2.setComposite(composite);
	    g2.setColor(colors[i%colors.length]);
	    if (objects[i] instanceof TextLayout) {
                ((TextLayout)objects[i]).draw(g2, (float) xx[i], (float) yy[i]);
	    } else if (objects[i] instanceof Image ) {
		 if (i == 0)
                      objects[i] = imgs[(imgN++)%imgs.length];
        	 g2.drawImage((Image) objects[i], (int) xx[i], (int) yy[i], null);
	    } else {
	         if (objects[i] instanceof Ellipse2D) {
	            ((Ellipse2D) objects[i]).setFrame(xx[i], yy[i], w/6, w/6);
	         } else if (objects[i] instanceof Rectangle2D) {
	            ((Rectangle2D) objects[i]).setRect(xx[i], yy[i], w/6, h/6);
	         } else if (objects[i] instanceof RoundRectangle2D) {
	            ((RoundRectangle2D) objects[i]).setRoundRect(xx[i], yy[i],w/8,w/8,10,10);
	         } else if (objects[i] instanceof Arc2D) {
	            ((Arc2D) objects[i]).setArc(xx[i], yy[i], w/5, w/5, 45, 270, Arc2D.PIE);
	         } else if (objects[i] instanceof QuadCurve2D) {
	            ((QuadCurve2D) objects[i]).setCurve(xx[i], yy[i],
			    xx[i]+w/4, yy[i]-h/8, xx[i]+w/2, yy[i]);
	         } else if (objects[i] instanceof CubicCurve2D) {
	            ((CubicCurve2D) objects[i]).setCurve(xx[i], yy[i],
			    xx[i]+30, yy[i]-h/8, xx[i]+h/8, yy[i]+60, xx[i]+90,yy[i]);
		 }
		 if (objects[i] instanceof QuadCurve2D || objects[i] instanceof CubicCurve2D) {
        	     g2.setStroke(new BasicStroke(5.0f));
                     g2.draw((Shape) objects[i]);
		 } else
                     g2.fill((Shape) objects[i]);
	    }
	}
    }


    public static void main(String s[]) {
	final FadeAnim demo = new FadeAnim();
	WindowListener l = new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	    public void windowDeiconified(WindowEvent e) { demo.start(); }
	    public void windowIconified(WindowEvent e) { demo.stop(); }
	};
	Frame f = new Frame("Java2D Demo - FadeAnim");
	f.addWindowListener(l);
	f.add("Center", demo);
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
	demo.start();
    }
}