Faire un robuste, redimensionnable Swing Chess GUI [fermé]

Je remarque que lors du redimensionnement, vous pouvez obtenir un petit espace entre l'échiquier et la bordure de ligne droite/botton. Cela se produit avec un GridLayout car l'espace n'est pas toujours divisible par 9.

Vous cherchez probablement des solutions en utilisant le JDK standard, mais si vous souhaitez vous débarrasser de ce petit écart, vous pouvez utiliser la disposition relative pour gérer l'échiquier et les étiquettes. L'écart existera toujours mais je l'ai déplacé vers les étiquettes afin que vous ne puissiez pas voir facilement le différence.

import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.border.*;
import java.net.URL;
import javax.imageio.ImageIO;

public class ChessGUI2 {

    private final JPanel gui = new JPanel(new BorderLayout(3, 3));
    private JButton[][] chessBoardSquares = new JButton[8][8];
    private Image[][] chessPieceImages = new Image[2][6];
    private JPanel chessBoard;
    private final JLabel message = new JLabel(
            "Chess Champ is ready to play!");
    private static final String COLS = "ABCDEFGH";
    public static final int QUEEN = 0, KING = 1, 
            ROOK = 2, KNIGHT = 3, BISHOP = 4, PAWN = 5;
    public static final int[] STARTING_ROW = {
        ROOK, KNIGHT, BISHOP, KING, QUEEN, BISHOP, KNIGHT, ROOK
    };

    ChessGUI2() {
        initializeGui();
    }

    public final void initializeGui() {
        // create the images for the chess pieces
        createImages();

        // set up the main GUI
        gui.setBorder(new EmptyBorder(5, 5, 5, 5));
        JToolBar tools = new JToolBar();
        tools.setFloatable(false);
        gui.add(tools, BorderLayout.PAGE_START);
        Action newGameAction = new AbstractAction("New") {

            @Override
            public void actionPerformed(ActionEvent e) {
                setupNewGame();
            }
        };
        tools.add(newGameAction);
        tools.add(new JButton("Save")); // TODO - add functionality!
        tools.add(new JButton("Restore")); // TODO - add functionality!
        tools.addSeparator();
        tools.add(new JButton("Resign")); // TODO - add functionality!
        tools.addSeparator();
        tools.add(message);

        gui.add(new JLabel("?"), BorderLayout.LINE_START);

//        chessBoard = new JPanel(new GridLayout(0, 9)) {
        chessBoard = new JPanel() {

            /**
             * Override the preferred size to return the largest it can, in
             * a square shape.  Must (must, must) be added to a GridBagLayout
             * as the only component (it uses the parent as a guide to size)
             * with no GridBagConstaint (so it is centered).
             */
            @Override
            public final Dimension getPreferredSize() {
                Dimension d = super.getPreferredSize();
                Dimension prefSize = null;
                Component c = getParent();
                if (c == null) {
                    prefSize = new Dimension(
                            (int)d.getWidth(),(int)d.getHeight());
                } else if (c!=null &&
                        c.getWidth()>d.getWidth() &&
                        c.getHeight()>d.getHeight()) {
                    prefSize = c.getSize();
                } else {
                    prefSize = d;
                }
                int w = (int) prefSize.getWidth();
                int h = (int) prefSize.getHeight();
                // the smaller of the two sizes
                int s = (w>h ? h : w);
                return new Dimension(s,s);
            }
        };

        RelativeLayout rl = new RelativeLayout(RelativeLayout.Y_AXIS);
        rl.setRoundingPolicy( RelativeLayout.FIRST );
        rl.setFill(true);
        chessBoard.setLayout( rl );

        chessBoard.setBorder(new CompoundBorder(
                new EmptyBorder(8,8,8,8),
                new LineBorder(Color.BLACK)
                ));
        // Set the BG to be ochre
        Color ochre = new Color(204,119,34);
        chessBoard.setBackground(ochre);
        JPanel boardConstrain = new JPanel(new GridBagLayout());
        boardConstrain.setBackground(ochre);
        boardConstrain.add(chessBoard);
        gui.add(boardConstrain);


        // our chess pieces are 64x64 px in size, so we'll
        // 'fill this in' using a transparent icon..
        ImageIcon icon = new ImageIcon(
                //new BufferedImage(64, 64, BufferedImage.TYPE_INT_ARGB));
                new BufferedImage(48, 48, BufferedImage.TYPE_INT_ARGB));

        // create the chess board squares
        Insets buttonMargin = new Insets(0, 0, 0, 0);
        for (int ii = 0; ii < chessBoardSquares.length; ii++) {
            for (int jj = 0; jj < chessBoardSquares[ii].length; jj++) {
                JButton b = new JButton();
                b.setMargin(buttonMargin);
                b.setIcon(icon);
                if ((jj % 2 == 1 && ii % 2 == 1)
                        //) {
                        || (jj % 2 == 0 && ii % 2 == 0)) {
                    b.setBackground(Color.WHITE);
                } else {
                    b.setBackground(Color.BLACK);
                }
                chessBoardSquares[jj][ii] = b;
            }
        }

        /*
         * fill the chess board
         */

        RelativeLayout topRL = new RelativeLayout(RelativeLayout.X_AXIS);
        topRL.setRoundingPolicy( RelativeLayout.FIRST );
        topRL.setFill(true);
        JPanel top = new JPanel( topRL );
        top.setOpaque(false);
        chessBoard.add(top, new Float(1));

        top.add(new JLabel(""), new Float(1));

        // fill the top row
        for (int ii = 0; ii < 8; ii++) {
            JLabel label = new JLabel(COLS.substring(ii, ii + 1), SwingConstants.CENTER);
            top.add(label, new Float(1));
        }
        // fill the black non-pawn piece row
        for (int ii = 0; ii < 8; ii++) {

            RelativeLayout rowRL = new RelativeLayout(RelativeLayout.X_AXIS);
            rowRL.setRoundingPolicy( RelativeLayout.FIRST );
            rowRL.setFill(true);
            JPanel row = new JPanel( rowRL );
            row.setOpaque(false);
            chessBoard.add(row, new Float(1));

            for (int jj = 0; jj < 8; jj++) {
                switch (jj) {
                    case 0:
                        row.add(new JLabel("" + (9-(ii + 1)), SwingConstants.CENTER), new Float(1));
                    default:
                        row.add(chessBoardSquares[jj][ii], new Float(1));
                }
            }
        }
    }

    public final JComponent getChessBoard() {
        return chessBoard;
    }

    public final JComponent getGui() {
        return gui;
    }

    private final void createImages() {
        try {
            URL url = new URL("http://i.stack.imgur.com/memI0.png");
            BufferedImage bi = ImageIO.read(url);
            for (int ii = 0; ii < 2; ii++) {
                for (int jj = 0; jj < 6; jj++) {
                    chessPieceImages[ii][jj] = bi.getSubimage(
//                            jj * 64, ii * 64, 64, 64);
                            jj * 64, ii * 64, 48, 48);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }

    /**
     * Initializes the icons of the initial chess board piece places
     */
    private final void setupNewGame() {
        message.setText("Make your move!");
        // set up the black pieces
        for (int ii = 0; ii < STARTING_ROW.length; ii++) {
            chessBoardSquares[ii][0].setIcon(new ImageIcon(
                    chessPieceImages[0][STARTING_ROW[ii]]));
        }
        for (int ii = 0; ii < STARTING_ROW.length; ii++) {
            chessBoardSquares[ii][1].setIcon(new ImageIcon(
                    chessPieceImages[0][PAWN]));
        }
        // set up the white pieces
        for (int ii = 0; ii < STARTING_ROW.length; ii++) {
            chessBoardSquares[ii][6].setIcon(new ImageIcon(
                    chessPieceImages[1][PAWN]));
        }
        for (int ii = 0; ii < STARTING_ROW.length; ii++) {
            chessBoardSquares[ii][7].setIcon(new ImageIcon(
                    chessPieceImages[1][STARTING_ROW[ii]]));
        }
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                ChessGUI2 cg = new ChessGUI2();

                JFrame f = new JFrame("ChessChamp");
                f.add(cg.getGui());
                // Ensures JVM closes after frame(s) closed and
                // all non-daemon threads are finished
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                // See http://stackoverflow.com/a/7143398/418556 for demo.
                f.setLocationByPlatform(true);

                // ensures the frame is the minimum size it needs to be
                // in order display the components within it
                f.pack();
                // ensures the minimum size is enforced.
                f.setMinimumSize(f.getSize());
                f.setVisible(true);
            }
        };
        // Swing GUIs should be created and updated on the EDT
        // http://docs.oracle.com/javase/tutorial/uiswing/concurrency
        SwingUtilities.invokeLater(r);
    }
}

Cela nécessite plus de travail car vous devez gérer les lignes séparément, pas dans une grille. En outre, je change le code que vous utilisez une image 48x48 pour faciliter le redimensionnement des tests sur mon petit moniteur.