/*

 *

 * 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

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 */

package java2d.demos.Clipping;

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import java.awt.image.BufferedImage;

import javax.swing.*;

import java2d.AnimatingControlsSurface;

import java2d.CustomControls;

import static java.lang.Math.random;

import static java.awt.Color.*;

/**

 * Animated clipping of an image & composited shapes.

 */

@SuppressWarnings("serial")

public class ClipAnim extends AnimatingControlsSurface {

    private static Image dimg, cimg;

    static TexturePaint texturePaint;

    static {

        BufferedImage bi = new BufferedImage(5, 5, BufferedImage.TYPE_INT_RGB);

        Graphics2D big = bi.createGraphics();

        big.setBackground(YELLOW);

        big.clearRect(0, 0, 5, 5);

        big.setColor(RED);

        big.fillRect(0, 0, 3, 3);

        texturePaint = new TexturePaint(bi, new Rectangle(0, 0, 5, 5));

    }

    private AnimVal animval[] = new AnimVal[3];

    protected boolean doObjects = true;

    private Font originalFont = new Font(Font.SERIF, Font.PLAIN, 12);

    private Font font;

    private GradientPaint gradient;

    private int strX, strY;

    private int dukeX, dukeY, dukeWidth, dukeHeight;

    public ClipAnim() {

        cimg = getImage("clouds.jpg");

        dimg = getImage("duke.png");

        setBackground(WHITE);

        animval[0] = new AnimVal(true);

        animval[1] = new AnimVal(false);

        animval[2] = new AnimVal(false);

        setControls(new Component[] { new DemoControls(this) });

    }

    @Override

    public void reset(int w, int h) {

        for (AnimVal a : animval) {

            a.reset(w, h);

        }

        gradient = new GradientPaint(0, h / 2, RED, w * .4f, h * .9f, YELLOW);

        double scale = 0.4;

        dukeHeight = (int) (scale * h);

        dukeWidth = (int) (dimg.getWidth(this) * scale * h / dimg.getHeight(this));

        dukeX = (int) (w * .25 - dukeWidth / 2);

        dukeY = (int) (h * .25 - dukeHeight / 2);

        FontMetrics fm = getFontMetrics(originalFont);

        double sw = fm.stringWidth("CLIPPING");

        double sh = fm.getAscent() + fm.getDescent();

        double sx = (w / 2 - 30) / sw;

        double sy = (h / 2 - 30) / sh;

        AffineTransform Tx = AffineTransform.getScaleInstance(sx, sy);

        font = originalFont.deriveFont(Tx);

        fm = getFontMetrics(font);

        strX = (int) (w * .75 - fm.stringWidth("CLIPPING") / 2);

        strY = (int) (h * .72 + fm.getAscent() / 2);

    }

    @Override

    public void step(int w, int h) {

        for (AnimVal a : animval) {

            if (a.isSelected) {

                a.step(w, h);

            }

        }

    }

    @Override

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

        GeneralPath p1 = new GeneralPath();

        GeneralPath p2 = new GeneralPath();

        for (AnimVal a : animval) {

            if (a.isSelected) {

                double x = a.x;

                double y = a.y;

                double ew = a.ew;

                double eh = a.eh;

                p1.append(new Ellipse2D.Double(x, y, ew, eh), false);

                p2.append(new Rectangle2D.Double(x + 5, y + 5, ew - 10, eh - 10),

                        false);

            }

        }

        if (animval[0].isSelected || animval[1].isSelected

                || animval[2].isSelected) {

            g2.setClip(p1);

            g2.clip(p2);

        }

        if (doObjects) {

            int w2 = w / 2;

            int h2 = h / 2;

            g2.drawImage(cimg, 0, 0, w2, h2, null);

            g2.drawImage(dimg, dukeX, dukeY, dukeWidth, dukeHeight, null);

            g2.setPaint(texturePaint);

            g2.fillRect(w2, 0, w2, h2);

            g2.setPaint(gradient);

            g2.fillRect(0, h2, w2, h2);

            g2.setColor(LIGHT_GRAY);

            g2.fillRect(w2, h2, w2, h2);

            g2.setColor(RED);

            g2.drawOval(w2, h2, w2 - 1, h2 - 1);

            g2.setFont(font);

            g2.drawString("CLIPPING", strX, strY);

        } else {

            g2.setColor(LIGHT_GRAY);

            g2.fillRect(0, 0, w, h);

        }

    }

    public static void main(String argv[]) {

        createDemoFrame(new ClipAnim());

    }

    public class AnimVal {

        double ix = 5.0;

        double iy = 3.0;

        double iw = 5.0;

        double ih = 3.0;

        double x, y;

        double ew, eh;   // ellipse width & height

        boolean isSelected;

        public AnimVal(boolean isSelected) {

            this.isSelected = isSelected;

        }

        public void step(int w, int h) {

            x += ix;

            y += iy;

            ew += iw;

            eh += ih;

            if (ew > w / 2) {

                ew = w / 2;

                iw = random() * -w / 16 - 1;

            }

            if (ew < w / 8) {

                ew = w / 8;

                iw = random() * w / 16 + 1;

            }

            if (eh > h / 2) {

                eh = h / 2;

                ih = random() * -h / 16 - 1;

            }

            if (eh < h / 8) {

                eh = h / 8;

                ih = random() * h / 16 + 1;

            }

            if ((x + ew) > w) {

                x = (w - ew) - 1;

                ix = random() * -w / 32 - 1;

            }

            if ((y + eh) > h) {

                y = (h - eh) - 2;

                iy = random() * -h / 32 - 1;

            }

            if (x < 0) {

                x = 2;

                ix = random() * w / 32 + 1;

            }

            if (y < 0) {

                y = 2;

                iy = random() * h / 32 + 1;

            }

        }

        public void reset(int w, int h) {

            x = random() * w;

            y = random() * h;

            ew = (random() * w) / 2;

            eh = (random() * h) / 2;

        }

    }

    static final class DemoControls extends CustomControls implements

            ActionListener {

        ClipAnim demo;

        JToolBar toolbar;

        public DemoControls(ClipAnim demo) {

            super(demo.name);

            this.demo = demo;

            add(toolbar = new JToolBar());

            toolbar.setFloatable(false);

            addTool("Objects", true);

            addTool("Clip1", true);

            addTool("Clip2", false);

            addTool("Clip3", false);

        }

        public void addTool(String str, boolean state) {

            JToggleButton b =

                    (JToggleButton) toolbar.add(new JToggleButton(str));

            b.setFocusPainted(false);

            b.setSelected(state);

            b.addActionListener(this);

            int width = b.getPreferredSize().width;

            Dimension prefSize = new Dimension(width, 21);

            b.setPreferredSize(prefSize);

            b.setMaximumSize(prefSize);

            b.setMinimumSize(prefSize);

        }

        @Override

        public void actionPerformed(ActionEvent e) {

            JToggleButton b = (JToggleButton) e.getSource();

            if (b.getText().equals("Objects")) {

                demo.doObjects = b.isSelected();

            } else if (b.getText().equals("Clip1")) {

                demo.animval[0].isSelected = b.isSelected();

            } else if (b.getText().equals("Clip2")) {

                demo.animval[1].isSelected = b.isSelected();

            } else if (b.getText().equals("Clip3")) {

                demo.animval[2].isSelected = b.isSelected();

            }

            if (!demo.animating.running()) {

                demo.repaint();

            }

        }

        @Override

        public Dimension getPreferredSize() {

            return new Dimension(200, 40);

        }

        @Override

        public void run() {

            try {

                Thread.sleep(5000);

            } catch (InterruptedException e) {

                return;

            }

            ((AbstractButton) toolbar.getComponentAtIndex(2)).doClick();

            try {

                Thread.sleep(5000);

            } catch (InterruptedException e) {

                return;

            }

            if (getSize().width > 400) {

                ((AbstractButton) toolbar.getComponentAtIndex(3)).doClick();

            }

            thread = null;

        }

    } // End DemoControls

} // End ClipAnim