/*
 * Copyright (c) 2008-2010, Piccolo2D project, http://piccolo2d.org
 * Copyright (c) 1998-2008, University of Maryland
 * 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.
 *
 * None of the name of the University of Maryland, the name of the Piccolo2D project, or 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, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.piccolo2d.examples;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;

import java.awt.image.BufferedImage;

import org.piccolo2d.PCanvas;
import org.piccolo2d.extras.PFrame;
import org.piccolo2d.extras.nodes.PShadow;
import org.piccolo2d.nodes.PImage;
import org.piccolo2d.nodes.PPath;
import org.piccolo2d.nodes.PText;





/**
 * Shadow example.
 */
public final class ShadowExample extends PFrame {

    private static final Color SHADOW_PAINT = new Color(20, 20, 20, 200);
    /** Default serial version UID. */
    private static final long serialVersionUID = 1L;


    /**
     * Create a new shadow example.
     */
    public ShadowExample() {
        this(null);
    }

    /**
     * Create a new shadow example with the specified canvas.
     *
     * @param canvas canvas for this shadow example
     */
    public ShadowExample(final PCanvas canvas) {
        super("ShadowExample", false, canvas);
    }


    /** {@inheritDoc} */
    public void initialize() {
        BufferedImage src = buildRedRectangleImage();    
        
        addHeaderAt("Shadow nodes drawn from an image, with increasing blur radius:", 0, 0);        

        double x = 25.0d;
        double y = 25.0d;

        for (int blurRadius = 4; blurRadius < 28; blurRadius += 4) {
            PImage node = new PImage(src);
            PShadow shadowNode = new PShadow(src, SHADOW_PAINT, blurRadius);

            node.setOffset(x, y);
            // offset the shadow to account for blur radius offset and light direction
            shadowNode.setOffset(x - (2 * blurRadius) + 5.0d, y - (2 * blurRadius) + 5.0d);

            // add shadow node before node, or set Z explicitly (e.g. sendToBack())
            getCanvas().getLayer().addChild(shadowNode);
            getCanvas().getLayer().addChild(node);

            x += 125.0d;
            if (x > 300.0d) {
                y += 125.0d;
                x = 25.0d;
            }
        }

        addHeaderAt("Shadow nodes drawn from node.toImage():", 0, 300);

        PPath rectNode = buildRedRectangleNode();

        PShadow rectShadow = new PShadow(rectNode.toImage(), SHADOW_PAINT, 8);
        rectShadow.setOffset(25.0d - (2 * 8) + 5.0d, 325.0d - (2 * 8) + 5.0d);

        getCanvas().getLayer().addChild(rectShadow);
        getCanvas().getLayer().addChild(rectNode);

        PText textNode = new PText("Shadow Text");
        textNode.setTextPaint(Color.RED);
        textNode.setFont(textNode.getFont().deriveFont(36.0f));
        textNode.setOffset(125.0d, 325.0d);

        PShadow textShadow = new PShadow(textNode.toImage(), SHADOW_PAINT, 8);
        textShadow.setOffset(125.0d - (2 * 8) + 2.5d, 325.0d - (2 * 8) + 2.5d);

        getCanvas().getLayer().addChild(textShadow);
        getCanvas().getLayer().addChild(textNode);
    }

    private PText addHeaderAt(String labelText, double x, double y) {
        PText labelNode = new PText(labelText);
        labelNode.setOffset(x, y);
        getCanvas().getLayer().addChild(labelNode);
        return labelNode;
    }

   

    private BufferedImage buildRedRectangleImage() {
        BufferedImage src = new BufferedImage(75, 75, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = src.createGraphics();
        g.setPaint(Color.RED);
        g.fillRect(0, 0, 75, 75);
        g.dispose();
        return src;
    }
    
    private PPath buildRedRectangleNode() {
        PPath rectNode = PPath.createRectangle(0.0f, 0.0f, 75.0f, 75.0f);
        rectNode.setPaint(Color.RED);
        rectNode.setStroke(null);
        rectNode.setOffset(25.0d, 325.0d);
        return rectNode;
    }

    /**
     * Main.
     *
     * @param args command line arguments, ignored
     */
    public static void main(final String[] args) {
        new ShadowExample();
    }
}