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@ -30,12 +30,17 @@ public class Board {
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ArrayList<BoardCoordinate> legalMoves = null;
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Stack<Move> moveHistory;
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public boolean isGameOver;
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public boolean victor;
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Image youWin;
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Image youLose;
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public Board() {
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moveHistory = new Stack<>();
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// Initialize DrawingPanel
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panel = new DrawingPanel(DIMENSION, DIMENSION);
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youWin = panel.loadImage("you-win.png");
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youLose = panel.loadImage("you-lose.png");
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graphics = panel.getGraphics();
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// Connect up event handlers
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@ -46,6 +51,11 @@ public class Board {
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});
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panel.onMouseUp(this::handleMouseUp);
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// Initialize board
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setup();
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}
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public void setup() {
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// Initialize board
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board = new Piece[BOARD_SIZE][BOARD_SIZE];
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@ -131,6 +141,11 @@ public class Board {
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// Mouse down event handler
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// This sets the currently dragging piece
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void handleMouseDown(int x, int y) {
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if (isGameOver) {
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isGameOver = false;
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setup();
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return;
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}
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// Get board coordinate of mouse click
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BoardCoordinate coordinate = new ScreenCoordinate(x, y).toBoard();
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// If there's no piece there, return
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@ -154,23 +169,11 @@ public class Board {
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for (BoardCoordinate legalMove : legalMoves) {
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if (newCoordinate.equals(legalMove)) {
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move(dragging, newCoordinate);
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// QUICK TESTING CODE
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Piece movedPiece = get(newCoordinate);
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King oppositeKing = movedPiece.black ? whiteKing : blackKing;
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BoardCoordinate oppositeKingPosition = null;
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boolean inCheck = false;
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for (BoardCoordinate move : movedPiece.getLegalMoves(newCoordinate, this)) {
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if (get(move) == oppositeKing) {
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oppositeKingPosition = move;
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inCheck = true;
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break;
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}
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checkForCheckmate();
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if (!isGameOver) {
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move(ChessAI.findBestMove(this));
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checkForCheckmate();
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}
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if (inCheck && oppositeKing.getLegalMoves(oppositeKingPosition, this).size() == 0)
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isGameOver = true;
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move(ChessAI.findBestMove(this));
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break;
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}
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}
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@ -181,6 +184,23 @@ public class Board {
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draw();
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}
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public void checkForCheckmate() {
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BoardCoordinate movedCoordinate = moveHistory.peek().to;
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Piece movedPiece = get(movedCoordinate);
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King oppositeKing = movedPiece.black ? whiteKing : blackKing;
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BoardCoordinate oppositeKingPosition = null;
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boolean inCheck = false;
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for (BoardCoordinate move : movedPiece.getLegalMoves(movedCoordinate, this)) {
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if (get(move) == oppositeKing) {
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oppositeKingPosition = move;
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inCheck = true;
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break;
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}
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}
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isGameOver = inCheck && oppositeKing.getLegalMoves(oppositeKingPosition, this).size() == 0;
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victor = movedPiece.black;
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}
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public void draw() {
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draw(null);
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}
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@ -224,6 +244,11 @@ public class Board {
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// Otherwise, render it at the center of the board tile
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piece.draw(graphics, panel, boardCoordinate.equals(dragging) ? mousePosition : boardCoordinate.toScreen());
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});
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// Draw game over text
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if (isGameOver) {
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graphics.drawImage(victor ? youLose : youWin, 0, 0, panel);
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}
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}
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// Functional interfaces for forEachPiece
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