/*
 * @(#)Stars.java	1.10 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.Mix;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.lang.Math;
import java.util.Vector;
import J2DCanvas;


/**
 * Rendering single width & height rectangles in different colors.
 */
public class Stars extends J2DCanvas {

    private Color colors[] = { Color.red, Color.green, Color.white };
    private int cn;
    private Vector vector = new Vector();


    public Stars() {
	setBackground(Color.black);
        clearCanvas = false;
	runnable = true;
    }


    public void drawDemo(Graphics2D g2) {

	if (vector.size() == 300) {
	    g2.setColor(Color.black);
	    g2.setComposite(AlphaComposite.SrcOver);
	    g2.fill((Rectangle2D) vector.firstElement());
	    vector.removeElementAt(0);
	}

	g2.setColor(colors[cn%3]);
	vector.addElement(new Rectangle2D.Double(w*Math.random(), h*Math.random(), 2,2));

	g2.setComposite(AlphaComposite.getInstance(
                         AlphaComposite.SRC_OVER, (float) Math.random()));
	g2.fill((Rectangle2D) vector.lastElement());

	if (cn++ == 300) cn = 0;
    }


    public static void main(String s[]) {
	final Stars demo = new Stars();
	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 - Stars");
	f.addWindowListener(l);
	f.add("Center", demo);
	f.pack();
	f.setSize(new Dimension(400,300));
	f.show();
	demo.start();
    }
}