Clipped image when g.draw

  To: comp.lang.java.gui
Hello,

I've created a class (full source code at the bottom)
which extends java.awt.Component and is supposed to
represent a playing card. If the card is being dragged,
I'd like to draw a shadow underneath it. And the card
itself should be drawn a little bit displaced - to make
the impression that it has been lifted:

    public void paint(Graphics g) {
        if (this == dragged) {
            g.drawImage(shadow, 0, 0, this);
            g.drawImage(cardImg, -3, -4, this);
        } else {
            g.drawImage(cardImg, 0, 0, this);
        }
    }

My problem is however that the cardImg is being
clipped. Does anybody please have an idea how
to workaround this?

Thank you
Alex

PS: Here is the full source code:

// $Id: Card.java,v 1.2 2007/07/18 10:10:33 afarber Exp $

import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;

class Card extends Component implements MouseListener,
MouseMotionListener
{
    public static final int WIDTH = 70;
    public static final int HEIGHT = 100;

    public static final int SPADE = 0;
    public static final int CLUB = 1;
    public static final int DIAMOND = 2;
    public static final int HEART = 3;
    public static final int NOTRUMP = 4;

    private static Card dragged;

    private static Image[][] faces;
    private static Image back;
    private static Image shadow;

    public byte rank, suit;
    public boolean opened;
    public int whose;

    public Card(int rank, int suit) {
        setSize(WIDTH, HEIGHT);
        addMouseListener(this);
        addMouseMotionListener(this);

        this.rank = (byte) rank;
        this.suit = (byte) suit;
    }

    public Card(char ch) {
        setSize(WIDTH, HEIGHT);
        addMouseListener(this);
        addMouseMotionListener(this);

        rank = (byte) (ch >> 8);
        suit = (byte) ch;
    }

    public boolean equals(Card card) {
        return (rank == card.rank && suit == card.suit);
    }

    public char toChar() {
        return (char) ((rank << 8) | suit);
    }

    public void paint(Graphics g) {
        if (this == dragged) {
            g.drawImage(shadow, 0, 0, this);

                        // XXX the image below is clipped :-(
            g.drawImage(opened ? faces[rank][suit] : back,
                -3, -4, this);
        } else {
            g.drawImage(opened ? faces[rank][suit] : back,
                0, 0, this);
        }
    }

    public static void prepImages(Image big) {
        ImageProducer source = big.getSource();

        // create 32 card images
        faces = new Image[8][4];
        for (int rank = 0; rank < 8; rank++)
            for (int suit = SPADE; suit <= HEART; suit++) {
                ImageFilter filter =
                    new CropImageFilter(rank * WIDTH,
                    suit * HEIGHT, WIDTH, HEIGHT);
                ImageProducer producer = new
                    FilteredImageSource(source, filter);
                faces[rank][suit] = Toolkit.getDefaultToolkit()
                    .createImage(producer);
            }
        // create the image of a card's back
        ImageFilter filter =
            new CropImageFilter(560, 0, WIDTH, HEIGHT);
        ImageProducer producer =
            new FilteredImageSource(source, filter);
        back = Toolkit.getDefaultToolkit().createImage(producer);
        // use a card shape to create shadow
        int[] pixels = new int[WIDTH * HEIGHT];
        PixelGrabber grabber = new PixelGrabber(big, 0, 0,
            WIDTH, HEIGHT, pixels, 0, WIDTH);
        try {
            grabber.grabPixels();
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
        // turn non-transparent pixels to shadow
        for (int i = 0; i < pixels.length; i++)
            if (0 != (pixels[i] & 0xFF000000))
                pixels[i] = 0x60000000;
        shadow = Toolkit.getDefaultToolkit().createImage(
            new MemoryImageSource(WIDTH, HEIGHT, pixels, 0, WIDTH));
    }

    public void mouseExited(MouseEvent event) {
        System.out.println("mouseExited:" + event);
        dragged = null;
        getParent().repaint();
    }

    public void mouseReleased(MouseEvent event) {
        System.out.println("mouseReleased" + event);
        dragged = null;
        getParent().repaint();
    }

    public void mousePressed(MouseEvent event) {
        System.out.println("mousePressed" + event);
        dragged = this;
        getParent().repaint();
    }

    public void mouseEntered(MouseEvent event) {
        System.out.println("mouseEntered" + event);
    }

    public void mouseClicked(MouseEvent event) {
        System.out.println("mouseClicked" + event);
    }

    public void mouseMoved(MouseEvent event) {
        System.out.println("mouseMoved" + event);
    }

    public void mouseDragged(MouseEvent event) {
        System.out.println("mouseDragged" + event);
    }

    public static int randomRank() {
        return (int) Math.floor(8.0 * Math.random());
    }

    public static int randomSuit() {
        return (int) Math.floor(4.0 * Math.random());
    }

    public static void main(String args[]) {
        Frame frame = new Frame("Card Test");
        frame.setForeground(Color.white);
        frame.setBackground(Color.gray);
        frame.setLayout(null);

        final String PATH = "media/cards.gif";
        Image big = Toolkit.getDefaultToolkit().getImage(PATH);
        MediaTracker tracker = new MediaTracker(frame);
        tracker.addImage(big, 0);
        try {
            tracker.waitForAll();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        if (tracker.isErrorAny()) {
            System.err.println("Image " + PATH + " not found");
            return;
        }

        Card.prepImages(big);
        Card card = new Card(randomRank(), randomSuit());
        card.opened = true;
        frame.add(card);
        frame.validate();
        card.setLocation(200, 100);

        frame.setSize(400, 300);
        frame.setVisible(true);
    }
}

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