/*

 *

 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

package java2d.demos.Colors;

import static java.awt.Color.RED;

import static java.awt.Color.WHITE;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Ellipse2D;

import java2d.Surface;

/**

 * Creating colors with an alpha value.

 */

@SuppressWarnings("serial")

public class BullsEye extends Surface {

    public BullsEye() {

        setBackground(WHITE);

    }

    @Override

    public void render(int w, int h, Graphics2D g2) {

        Color reds[] = { RED.darker(), RED };

        for (int N = 0; N < 18; N++) {

            float i = (N + 2) / 2.0f;

            float x = (5 + i * (w / 2 / 10));

            float y = (5 + i * (h / 2 / 10));

            float ew = (w - 10) - (i * w / 10);

            float eh = (h - 10) - (i * h / 10);

            float alpha = (N == 0) ? 0.1f : 1.0f / (19.0f - N);

            if (N >= 16) {

                g2.setColor(reds[N - 16]);

            } else {

                g2.setColor(new Color(0f, 0f, 0f, alpha));

            }

            g2.fill(new Ellipse2D.Float(x, y, ew, eh));

        }

    }

    public static void main(String s[]) {

        createDemoFrame(new BullsEye());

    }

}