Fade In Demo : Animation « Swing Components « Java

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Java » Swing Components » AnimationScreenshots 
Fade In Demo
Fade In Demo



/*
 * Copyright (c) 2007, Romain Guy
 * 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 the TimingFramework project 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, 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.
 */
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.awt.GraphicsConfiguration;
import java.awt.Transparency;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.text.JTextComponent;
import org.jdesktop.animation.timing.Animator;
import org.jdesktop.animation.timing.TimingTargetAdapter;
import org.jdesktop.animation.timing.interpolation.KeyFrames;
import org.jdesktop.animation.timing.interpolation.KeyValues;
import org.jdesktop.animation.timing.interpolation.PropertySetter;

/**
 *
 @author Romain Guy <romain.guy@mac.com>
 */
public class FadingDemo extends JFrame {
    private ImageViewer imageViewer;

    private JButton nextButton;
    private JButton previousButton;

    private HelpGlassPane glass;

    private JTextField titleField;

    public FadingDemo() {
        super("Fading Demo");
        
        add(buildTitle(), BorderLayout.NORTH);
        add(buildImageViewer(), BorderLayout.CENTER);
        add(buildControls(), BorderLayout.SOUTH);
        
        pack();
        
        setupGlassPane();
        
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setResizable(false);
    }
    
    private JComponent buildTitle() {
        titleField = new JTextField("Suzhou");
        return titleField;
    }
    
    private void setupGlassPane() {
        glass = new HelpGlassPane();
        setGlassPane(glass);
        glass.setVisible(true);
    }
    
    public static void setTextAndAnimate(final JTextComponent textComponent,
            final String text) {
       Color c = textComponent.getForeground();

       KeyFrames keyFrames = new KeyFrames(KeyValues.create(
                   new Color(c.getRed(), c.getGreen(), c.getBlue()255),
                   new Color(c.getRed(), c.getGreen(), c.getBlue()0),
                   new Color(c.getRed(), c.getGreen(), c.getBlue()255)
               ));
       PropertySetter setter = new PropertySetter(textComponent, "foreground",
               keyFrames);

       Animator animator = new Animator(200, setter);
       animator.addTarget(new TimingTargetAdapter() {
           private boolean textSet = false;

           public void timingEvent(float fraction) {
               if (fraction >= 0.5f && !textSet) {
                   textComponent.setText(text);
                   textSet = true;
               }
           
       });
       animator.start();
    }
    
    private JComponent buildControls() {
        JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEADING));
        
        panel.add(previousButton = new JButton("Previous"));
        previousButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                imageViewer.previous();
                setTextAndAnimate(titleField, "Suzhou");
            }
        });
        panel.add(nextButton = new JButton("Next"));
        nextButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                imageViewer.next();
                setTextAndAnimate(titleField, "Shanghai");
                
                if (glass.isVisible()) {
                    Animator animator = new Animator(200);
                    animator.addTarget(new PropertySetter(glass, "alpha"0.0f));
                    animator.setAcceleration(0.2f);
                    animator.setDeceleration(0.4f);
                    animator.start();
                }
            }
        });
        
        return panel;
    }
    
    private JComponent buildImageViewer() {
        return imageViewer = new ImageViewer();
    }
    
    public class HelpGlassPane extends JComponent {
        private BufferedImage helpImage;
        private float alpha = 1.0f;
        
        private HelpGlassPane() {
            try {
                helpImage = GraphicsUtilities.loadCompatibleImage(
                        getClass().getResource("help.png"));
            catch (IOException ex) {
                ex.printStackTrace();
            }
            addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    Animator animator = new Animator(200);
                    animator.addTarget(new PropertySetter(
                            HelpGlassPane.this, "alpha"0.0f));
                    animator.setAcceleration(0.2f);
                    animator.setDeceleration(0.4f);
                    animator.start();
                }
            });
        }
        
        public void setAlpha(float alpha) {
            this.alpha = alpha;
            if (alpha <= 0.01f) {
                setVisible(false);
            }
            repaint();
        }
        
        public float getAlpha() {
            return this.alpha;
        }
        
        @Override
        protected void paintComponent(Graphics g) {
            Graphics2D g2 = (Graphics2Dg.create();
            
            Point p = nextButton.getLocationOnScreen();
            
            p.x += nextButton.getWidth() 16;
            p.y += nextButton.getHeight() - helpImage.getHeight() 10;
            
            SwingUtilities.convertPointFromScreen(p, this);
            
            g2.setComposite(AlphaComposite.SrcOver.derive(alpha));
            g2.drawImage(helpImage, p.x, p.y, null);
        }
    }
    
    public static class ImageViewer extends JComponent {
        private BufferedImage firstImage;
        private BufferedImage secondImage;
        
        private float alpha = 0.0f;
        
        private ImageViewer() {
            try {
                firstImage = GraphicsUtilities.loadCompatibleImage(
                    getClass().getResource("suzhou.jpg"));
                secondImage = GraphicsUtilities.loadCompatibleImage(
                    getClass().getResource("shanghai.jpg"));
            catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        
        @Override
        public Dimension getPreferredSize() {
            return new Dimension(firstImage.getWidth(), firstImage.getHeight());
        }
        
        public void next() {
            Animator animator = new Animator(1000);
            animator.addTarget(new PropertySetter(this, "alpha"1.0f));
            animator.setAcceleration(0.2f);
            animator.setDeceleration(0.4f);
            animator.start();
        }
        
        public void previous() {
            Animator animator = new Animator(1000);
            animator.addTarget(new PropertySetter(this, "alpha"0.0f));
            animator.setAcceleration(0.2f);
            animator.setDeceleration(0.4f);
            animator.start();
        }
        
        public void setAlpha(float alpha) {
            this.alpha = alpha;
            repaint();
        }
        
        public float getAlpha() {
            return this.alpha;
        }
        
        @Override
        protected void paintComponent(Graphics g) {
            Graphics2D g2 = (Graphics2Dg.create();
            
            g2.setComposite(AlphaComposite.SrcOver.derive(1.0f - alpha));
            g2.drawImage(firstImage, 00null);
            g2.setComposite(AlphaComposite.SrcOver.derive(alpha));
            g2.drawImage(secondImage, 00null);
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new FadingDemo().setVisible(true);
            }
        });
    }
}


/**
 * <p><code>GraphicsUtilities</code> contains a set of tools to perform
 * common graphics operations easily. These operations are divided into
 * several themes, listed below.</p>
 * <h2>Compatible Images</h2>
 * <p>Compatible images can, and should, be used to increase drawing
 * performance. This class provides a number of methods to load compatible
 * images directly from files or to convert existing images to compatibles
 * images.</p>
 * <h2>Creating Thumbnails</h2>
 * <p>This class provides a number of methods to easily scale down images.
 * Some of these methods offer a trade-off between speed and result quality and
 * shouuld be used all the time. They also offer the advantage of producing
 * compatible images, thus automatically resulting into better runtime
 * performance.</p>
 * <p>All these methodes are both faster than
 {@link java.awt.Image#getScaledInstance(int, int, int)} and produce
 * better-looking results than the various <code>drawImage()</code> methods
 * in {@link java.awt.Graphics}, which can be used for image scaling.</p>
 * <h2>Image Manipulation</h2>
 * <p>This class provides two methods to get and set pixels in a buffered image.
 * These methods try to avoid unmanaging the image in order to keep good
 * performance.</p>
 *
 @author Romain Guy <romain.guy@mac.com>
 */
class GraphicsUtilities {
    private GraphicsUtilities() {
    }

    // Returns the graphics configuration for the primary screen
    private static GraphicsConfiguration getGraphicsConfiguration() {
        return GraphicsEnvironment.getLocalGraphicsEnvironment().
                    getDefaultScreenDevice().getDefaultConfiguration();
    }

    /**
     * <p>Returns a new <code>BufferedImage</code> using the same color model
     * as the image passed as a parameter. The returned image is only compatible
     * with the image passed as a parameter. This does not mean the returned
     * image is compatible with the hardware.</p>
     *
     @param image the reference image from which the color model of the new
     *   image is obtained
     @return a new <code>BufferedImage</code>, compatible with the color model
     *   of <code>image</code>
     */
    public static BufferedImage createColorModelCompatibleImage(BufferedImage image) {
        ColorModel cm = image.getColorModel();
        return new BufferedImage(cm,
            cm.createCompatibleWritableRaster(image.getWidth(),
                                              image.getHeight()),
            cm.isAlphaPremultiplied()null);
    }

    /**
     * <p>Returns a new compatible image with the same width, height and
     * transparency as the image specified as a parameter.</p>
     *
     @see java.awt.Transparency
     @see #createCompatibleImage(int, int)
     @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
     @see #createCompatibleTranslucentImage(int, int)
     @see #loadCompatibleImage(java.net.URL)
     @see #toCompatibleImage(java.awt.image.BufferedImage)
     @param image the reference image from which the dimension and the
     *   transparency of the new image are obtained
     @return a new compatible <code>BufferedImage</code> with the same
     *   dimension and transparency as <code>image</code>
     */
    public static BufferedImage createCompatibleImage(BufferedImage image) {
        return createCompatibleImage(image, image.getWidth(), image.getHeight());
    }

    /**
     * <p>Returns a new compatible image of the specified width and height, and
     * the same transparency setting as the image specified as a parameter.</p>
     *
     @see java.awt.Transparency
     @see #createCompatibleImage(java.awt.image.BufferedImage)
     @see #createCompatibleImage(int, int)
     @see #createCompatibleTranslucentImage(int, int)
     @see #loadCompatibleImage(java.net.URL)
     @see #toCompatibleImage(java.awt.image.BufferedImage)
     @param width the width of the new image
     @param height the height of the new image
     @param image the reference image from which the transparency of the new
     *   image is obtained
     @return a new compatible <code>BufferedImage</code> with the same
     *   transparency as <code>image</code> and the specified dimension
     */
    public static BufferedImage createCompatibleImage(BufferedImage image,
                                                      int width, int height) {
        return getGraphicsConfiguration().createCompatibleImage(width, height,
                                                   image.getTransparency());
    }

    /**
     * <p>Returns a new opaque compatible image of the specified width and
     * height.</p>
     *
     @see #createCompatibleImage(java.awt.image.BufferedImage)
     @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
     @see #createCompatibleTranslucentImage(int, int)
     @see #loadCompatibleImage(java.net.URL)
     @see #toCompatibleImage(java.awt.image.BufferedImage)
     @param width the width of the new image
     @param height the height of the new image
     @return a new opaque compatible <code>BufferedImage</code> of the
     *   specified width and height
     */
    public static BufferedImage createCompatibleImage(int width, int height) {
        return getGraphicsConfiguration().createCompatibleImage(width, height);
    }

    /**
     * <p>Returns a new translucent compatible image of the specified width
     * and height.</p>
     *
     @see #createCompatibleImage(java.awt.image.BufferedImage)
     @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
     @see #createCompatibleImage(int, int)
     @see #loadCompatibleImage(java.net.URL)
     @see #toCompatibleImage(java.awt.image.BufferedImage)
     @param width the width of the new image
     @param height the height of the new image
     @return a new translucent compatible <code>BufferedImage</code> of the
     *   specified width and height
     */
    public static BufferedImage createCompatibleTranslucentImage(int width,
                                                                 int height) {
        return getGraphicsConfiguration().createCompatibleImage(width, height,
                                                   Transparency.TRANSLUCENT);
    }

    /**
     * <p>Returns a new compatible image from a URL. The image is loaded from the
     * specified location and then turned, if necessary into a compatible
     * image.</p>
     *
     @see #createCompatibleImage(java.awt.image.BufferedImage)
     @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
     @see #createCompatibleImage(int, int)
     @see #createCompatibleTranslucentImage(int, int)
     @see #toCompatibleImage(java.awt.image.BufferedImage)
     @param resource the URL of the picture to load as a compatible image
     @return a new translucent compatible <code>BufferedImage</code> of the
     *   specified width and height
     @throws java.io.IOException if the image cannot be read or loaded
     */
    public static BufferedImage loadCompatibleImage(URL resource)
            throws IOException {
        BufferedImage image = ImageIO.read(resource);
        return toCompatibleImage(image);
    }

    /**
     * <p>Return a new compatible image that contains a copy of the specified
     * image. This method ensures an image is compatible with the hardware,
     * and therefore optimized for fast blitting operations.</p>
     *
     @see #createCompatibleImage(java.awt.image.BufferedImage)
     @see #createCompatibleImage(java.awt.image.BufferedImage, int, int)
     @see #createCompatibleImage(int, int)
     @see #createCompatibleTranslucentImage(int, int)
     @see #loadCompatibleImage(java.net.URL)
     @param image the image to copy into a new compatible image
     @return a new compatible copy, with the
     *   same width and height and transparency and content, of <code>image</code>
     */
    public static BufferedImage toCompatibleImage(BufferedImage image) {
        if (image.getColorModel().equals(
                getGraphicsConfiguration().getColorModel())) {
            return image;
        }

        BufferedImage compatibleImage =
                getGraphicsConfiguration().createCompatibleImage(
                    image.getWidth(), image.getHeight(),
                    image.getTransparency());
        Graphics g = compatibleImage.getGraphics();
        g.drawImage(image, 00null);
        g.dispose();

        return compatibleImage;
    }

    /**
     * <p>Returns a thumbnail of a source image. <code>newSize</code> defines
     * the length of the longest dimension of the thumbnail. The other
     * dimension is then computed according to the dimensions ratio of the
     * original picture.</p>
     * <p>This method favors speed over quality. When the new size is less than
     * half the longest dimension of the source image,
     {@link #createThumbnail(BufferedImage, int)} or
     {@link #createThumbnail(BufferedImage, int, int)} should be used instead
     * to ensure the quality of the result without sacrificing too much
     * performance.</p>
     *
     @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int, int)
     @param image the source image
     @param newSize the length of the largest dimension of the thumbnail
     @return a new compatible <code>BufferedImage</code> containing a
     *   thumbnail of <code>image</code>
     @throws IllegalArgumentException if <code>newSize</code> is larger than
     *   the largest dimension of <code>image</code> or &lt;= 0
     */
    public static BufferedImage createThumbnailFast(BufferedImage image,
                                                    int newSize) {
        float ratio;
        int width = image.getWidth();
        int height = image.getHeight();

        if (width > height) {
            if (newSize >= width) {
                throw new IllegalArgumentException("newSize must be lower than" +
                                                   " the image width");
            else if (newSize <= 0) {
                 throw new IllegalArgumentException("newSize must" +
                                                    " be greater than 0");
            }

            ratio = (floatwidth / (floatheight;
            width = newSize;
            height = (int) (newSize / ratio);
        else {
            if (newSize >= height) {
                throw new IllegalArgumentException("newSize must be lower than" +
                                                   " the image height");
            else if (newSize <= 0) {
                 throw new IllegalArgumentException("newSize must" +
                                                    " be greater than 0");
            }

            ratio = (floatheight / (floatwidth;
            height = newSize;
            width = (int) (newSize / ratio);
        }

        BufferedImage temp = createCompatibleImage(image, width, height);
        Graphics2D g2 = temp.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                            RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2.drawImage(image, 00, temp.getWidth(), temp.getHeight()null);
        g2.dispose();

        return temp;
    }

    /**
     * <p>Returns a thumbnail of a source image.</p>
     * <p>This method favors speed over quality. When the new size is less than
     * half the longest dimension of the source image,
     {@link #createThumbnail(BufferedImage, int)} or
     {@link #createThumbnail(BufferedImage, int, int)} should be used instead
     * to ensure the quality of the result without sacrificing too much
     * performance.</p>
     *
     @see #createThumbnailFast(java.awt.image.BufferedImage, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int, int)
     @param image the source image
     @param newWidth the width of the thumbnail
     @param newHeight the height of the thumbnail
     @return a new compatible <code>BufferedImage</code> containing a
     *   thumbnail of <code>image</code>
     @throws IllegalArgumentException if <code>newWidth</code> is larger than
     *   the width of <code>image</code> or if code>newHeight</code> is larger
     *   than the height of <code>image</code> or if one of the dimensions
     *   is &lt;= 0
     */
    public static BufferedImage createThumbnailFast(BufferedImage image,
                                                    int newWidth, int newHeight) {
        if (newWidth >= image.getWidth() ||
            newHeight >= image.getHeight()) {
            throw new IllegalArgumentException("newWidth and newHeight cannot" +
                                               " be greater than the image" +
                                               " dimensions");
        else if (newWidth <= || newHeight <= 0) {
            throw new IllegalArgumentException("newWidth and newHeight must" +
                                               " be greater than 0");
        }

        BufferedImage temp = createCompatibleImage(image, newWidth, newHeight);
        Graphics2D g2 = temp.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                            RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2.drawImage(image, 00, temp.getWidth(), temp.getHeight()null);
        g2.dispose();

        return temp;
    }

    /**
     * <p>Returns a thumbnail of a source image. <code>newSize</code> defines
     * the length of the longest dimension of the thumbnail. The other
     * dimension is then computed according to the dimensions ratio of the
     * original picture.</p>
     * <p>This method offers a good trade-off between speed and quality.
     * The result looks better than
     {@link #createThumbnailFast(java.awt.image.BufferedImage, int)} when
     * the new size is less than half the longest dimension of the source
     * image, yet the rendering speed is almost similar.</p>
     *
     @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
     @see #createThumbnailFast(java.awt.image.BufferedImage, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int, int)
     @param image the source image
     @param newSize the length of the largest dimension of the thumbnail
     @return a new compatible <code>BufferedImage</code> containing a
     *   thumbnail of <code>image</code>
     @throws IllegalArgumentException if <code>newSize</code> is larger than
     *   the largest dimension of <code>image</code> or &lt;= 0
     */
    public static BufferedImage createThumbnail(BufferedImage image,
                                                int newSize) {
        int width = image.getWidth();
        int height = image.getHeight();

        boolean isWidthGreater = width > height;

        if (isWidthGreater) {
            if (newSize >= width) {
                throw new IllegalArgumentException("newSize must be lower than" +
                                                   " the image width");
            }
        else if (newSize >= height) {
            throw new IllegalArgumentException("newSize must be lower than" +
                                               " the image height");
        }

        if (newSize <= 0) {
            throw new IllegalArgumentException("newSize must" +
                                               " be greater than 0");
        }

        float ratioWH = (floatwidth / (floatheight;
        float ratioHW = (floatheight / (floatwidth;

        BufferedImage thumb = image;

        do {
            if (isWidthGreater) {
                width /= 2;
                if (width < newSize) {
                    width = newSize;
                }
                height = (int) (width / ratioWH);
            else {
                height /= 2;
                if (height < newSize) {
                    height = newSize;
                }
                width = (int) (height / ratioHW);
            }


            BufferedImage temp = createCompatibleImage(image, width, height);
            Graphics2D g2 = temp.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g2.drawImage(thumb, 00, temp.getWidth(), temp.getHeight()null);
            g2.dispose();

            thumb = temp;
        while (newSize != (isWidthGreater ? width : height));

        return thumb;
    }

    /**
     * <p>Returns a thumbnail of a source image.</p>
     * <p>This method offers a good trade-off between speed and quality.
     * The result looks better than
     {@link #createThumbnailFast(java.awt.image.BufferedImage, int)} when
     * the new size is less than half the longest dimension of the source
     * image, yet the rendering speed is almost similar.</p>
     *
     @see #createThumbnailFast(java.awt.image.BufferedImage, int)
     @see #createThumbnailFast(java.awt.image.BufferedImage, int, int)
     @see #createThumbnail(java.awt.image.BufferedImage, int)
     @param image the source image
     @param newWidth the width of the thumbnail
     @param newHeight the height of the thumbnail
     @return a new compatible <code>BufferedImage</code> containing a
     *   thumbnail of <code>image</code>
     @throws IllegalArgumentException if <code>newWidth</code> is larger than
     *   the width of <code>image</code> or if code>newHeight</code> is larger
     *   than the height of <code>image or if one the dimensions is not &gt; 0</code>
     */
    public static BufferedImage createThumbnail(BufferedImage image,
                                                int newWidth, int newHeight) {
        int width = image.getWidth();
        int height = image.getHeight();

        if (newWidth >= width || newHeight >= height) {
            throw new IllegalArgumentException("newWidth and newHeight cannot" +
                                               " be greater than the image" +
                                               " dimensions");
        else if (newWidth <= || newHeight <= 0) {
            throw new IllegalArgumentException("newWidth and newHeight must" +
                                               " be greater than 0");
        }

        BufferedImage thumb = image;

        do {
            if (width > newWidth) {
                width /= 2;
                if (width < newWidth) {
                    width = newWidth;
                }
            }

            if (height > newHeight) {
                height /= 2;
                if (height < newHeight) {
                    height = newHeight;
                }
            }

            BufferedImage temp = createCompatibleImage(image, width, height);
            Graphics2D g2 = temp.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                                RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g2.drawImage(thumb, 00, temp.getWidth(), temp.getHeight()null);
            g2.dispose();

            thumb = temp;
        while (width != newWidth || height != newHeight);

        return thumb;
    }

    /**
     * <p>Returns an array of pixels, stored as integers, from a
     * <code>BufferedImage</code>. The pixels are grabbed from a rectangular
     * area defined by a location and two dimensions. Calling this method on
     * an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code>
     * and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p>
     *
     @param img the source image
     @param x the x location at which to start grabbing pixels
     @param y the y location at which to start grabbing pixels
     @param w the width of the rectangle of pixels to grab
     @param h the height of the rectangle of pixels to grab
     @param pixels a pre-allocated array of pixels of size w*h; can be null
     @return <code>pixels</code> if non-null, a new array of integers
     *   otherwise
     @throws IllegalArgumentException is <code>pixels</code> is non-null and
     *   of length &lt; w*h
     */
    public static int[] getPixels(BufferedImage img,
                                  int x, int y, int w, int h, int[] pixels) {
        if (w == || h == 0) {
            return new int[0];
        }

        if (pixels == null) {
            pixels = new int[w * h];
        else if (pixels.length < w * h) {
            throw new IllegalArgumentException("pixels array must have a length" +
                                               " >= w*h");
        }

        int imageType = img.getType();
        if (imageType == BufferedImage.TYPE_INT_ARGB ||
            imageType == BufferedImage.TYPE_INT_RGB) {
            Raster raster = img.getRaster();
            return (int[]) raster.getDataElements(x, y, w, h, pixels);
        }

        // Unmanages the image
        return img.getRGB(x, y, w, h, pixels, 0, w);
    }

    /**
     * <p>Writes a rectangular area of pixels in the destination
     * <code>BufferedImage</code>. Calling this method on
     * an image of type different from <code>BufferedImage.TYPE_INT_ARGB</code>
     * and <code>BufferedImage.TYPE_INT_RGB</code> will unmanage the image.</p>
     *
     @param img the destination image
     @param x the x location at which to start storing pixels
     @param y the y location at which to start storing pixels
     @param w the width of the rectangle of pixels to store
     @param h the height of the rectangle of pixels to store
     @param pixels an array of pixels, stored as integers
     @throws IllegalArgumentException is <code>pixels</code> is non-null and
     *   of length &lt; w*h
     */
    public static void setPixels(BufferedImage img,
                                 int x, int y, int w, int h, int[] pixels) {
        if (pixels == null || w == || h == 0) {
            return;
        else if (pixels.length < w * h) {
            throw new IllegalArgumentException("pixels array must have a length" +
                                               " >= w*h");
        }

        int imageType = img.getType();
        if (imageType == BufferedImage.TYPE_INT_ARGB ||
            imageType == BufferedImage.TYPE_INT_RGB) {
            WritableRaster raster = img.getRaster();
            raster.setDataElements(x, y, w, h, pixels);
        else {
            // Unmanages the image
            img.setRGB(x, y, w, h, pixels, 0, w);
        }
    }
}


           
       
Filthy-Rich-Clients-FadeInDemo.zip( 310 k)
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