Adding Graphical User Interface (#2)

BoardPanel.java

@@ -0,0 +1,170 @@
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.net.URL;
+
+public class BoardPanel extends JPanel implements MouseListener {
+    private static final int[] HORIZONTAL_POSITIONS = { 44, 223, 405 };
+    private static final int[] VERTICAL_POSITION = { 40, 224, 403 };
+    private static final int FIGURE_WIDTH = 110;
+    private static final int FIGURE_HEIGHT = 110;
+
+    private Image boardImage;
+    private Image[] boardFigures = new Image[9];
+    private Image[] catImages = new Image[9];
+    private Image[] dogImages = new Image[9];
+    private TIC_TAC_TOE game;
+
+    public BoardPanel() {
+        initGame();
+        initComponents();
+    }
+
+    private void initGame() {
+        game = new TIC_TAC_TOE();
+        game.resetBoard();
+    }
+
+    private void initComponents() {
+        // load images
+        boardImage = getImage("board.png");
+        loadPieceImages("cat", catImages);
+        loadPieceImages("dog", dogImages);
+
+        // Listen to the mouse
+        addMouseListener(this);
+
+        // set panel size
+        setPreferredSize(new Dimension(boardImage.getWidth(null), boardImage.getHeight(null)));
+    }
+
+    private void loadPieceImages(String name, Image[] images) {
+        for (int i = 0; i < 9; ++i) {
+            images[i] = getImage(String.format("%s-%02d.png", name, i + 1));
+        }
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+
+        // draw board
+        g.drawImage(boardImage, 0, 0, this);
+
+        paintFigure(g, 0, 0);
+        paintFigure(g, 1, 0);
+        paintFigure(g, 2, 0);
+
+        paintFigure(g, 0, 1);
+        paintFigure(g, 1, 1);
+        paintFigure(g, 2, 1);
+
+        paintFigure(g, 0, 2);
+        paintFigure(g, 1, 2);
+        paintFigure(g, 2, 2);
+
+        // make sure we update the graphics
+        Toolkit.getDefaultToolkit().sync();
+    }
+
+    void paintFigure(Graphics g, int x, int y) {
+        char figure = game.ch[y][x];
+        if (figure != 'X' && figure != '0') {
+            return;
+        }
+        g.drawImage(boardFigures[y * 3 + x], HORIZONTAL_POSITIONS[x], VERTICAL_POSITION[y], this);
+    }
+
+    private Point clickToSquare(int x, int y) {
+        Point square = new Point(-1, -1);
+        if (x >= HORIZONTAL_POSITIONS[0] && x <= HORIZONTAL_POSITIONS[0] + FIGURE_WIDTH) {
+            square.x = 0;
+        } else if (x >= HORIZONTAL_POSITIONS[1] && x <= HORIZONTAL_POSITIONS[1] + FIGURE_WIDTH) {
+            square.x = 1;
+        } else if (x >= HORIZONTAL_POSITIONS[2] && x <= HORIZONTAL_POSITIONS[2] + FIGURE_WIDTH) {
+            square.x = 2;
+        }
+
+        if (y >= VERTICAL_POSITION[0] && y <= VERTICAL_POSITION[0] + FIGURE_HEIGHT) {
+            square.y = 0;
+        } else if (y >= VERTICAL_POSITION[1] && y <= VERTICAL_POSITION[1] + FIGURE_HEIGHT) {
+            square.y = 1;
+        } else if (y >= VERTICAL_POSITION[2] && y <= VERTICAL_POSITION[2] + FIGURE_HEIGHT) {
+            square.y = 2;
+        }
+        return square;
+    }
+
+    private char nextFigure = 'X';
+
+    private boolean takeSquare(Point square) {
+        // already something there skip
+        if (game.ch[square.y][square.x] == 'X' || game.ch[square.y][square.x] == '0') {
+            System.out.printf("Square (%d, %d) already taken!%n",
+                    square.x, square.y);
+            return false;
+        }
+
+        // update the game
+        game.ch[square.y][square.x] = nextFigure;
+
+        // pick a random index for an image
+        Image symbolImage;
+        int randomImageIndex =  (int) (Math.random() * 9);
+
+        // Assign images and swap the figure for next turn
+        if (nextFigure == 'X') {
+            symbolImage = catImages[randomImageIndex];
+            nextFigure = '0';
+
+        } else {
+            symbolImage = dogImages[randomImageIndex];
+            nextFigure = 'X';
+        }
+
+        boardFigures[square.y * 3 + square.x] = symbolImage;
+
+        repaint();
+        return true;
+    }
+
+    @Override
+    public void mouseClicked(MouseEvent mouseEvent) {
+        Point square = clickToSquare(mouseEvent.getX(), mouseEvent.getY());
+        if (square.x != -1 && square.y != -1 && takeSquare(square)) {
+            int check = game.check();
+            if (check == 1) {
+                JOptionPane.showMessageDialog(this, "Player wins!",
+                        "Game Over", JOptionPane.PLAIN_MESSAGE);
+
+            } else if (check == 2) {
+                JOptionPane.showMessageDialog(this, "No more moves!",
+                        "Game Over", JOptionPane.PLAIN_MESSAGE);
+            }
+        }
+    }
+
+    @Override
+    public void mousePressed(MouseEvent mouseEvent) {
+        /* NO need to handle mouse presses */
+    }
+
+    @Override
+    public void mouseReleased(MouseEvent mouseEvent) {
+        /* No need to handle button release */
+    }
+
+    @Override
+    public void mouseEntered(MouseEvent mouseEvent) {
+        /* No need to test for enter */
+    }
+
+    @Override
+    public void mouseExited(MouseEvent mouseEvent) {
+        /* No need to test for exit */
+    }
+
+    public static Image getImage(String filename) {
+        return new ImageIcon("images/" + filename).getImage();
+    }
+}

TIC_TAC_TOE.java

@@ -36,6 +36,18 @@ void initialize(int i,char sym )
         }
     }
 
+    void resetBoard() {
+        char i1 = '1';
+        for(int i = 0;i<3;i++)
+        {
+            for(int j = 0;j<3;j++)
+            {
+                ch[i][j] = (char)i1;
+                i1++;
+            }
+        }
+    }
+
     void input()
     {
         int c1=0,c2=0;
@@ -67,15 +79,7 @@ void input()
         }
         while(true)
         {
-            char i1 = '1';
-            for(int i = 0;i<3;i++)
-            {
-                for(int j = 0;j<3;j++)
-                {
-                    ch[i][j] = (char)i1;
-                    i1++;
-                }
-            }
+            resetBoard();
             display();
 
 

TicTacToeGui.java

@@ -0,0 +1,28 @@
+import javax.swing.*;
+import java.awt.*;
+
+public class TicTacToeGui extends JFrame {
+    public TicTacToeGui() {
+        initUI();
+    }
+
+    private void initUI() {
+        BoardPanel boardPanel = new BoardPanel();
+
+        add(boardPanel);
+
+        pack();
+        setResizable(false);
+
+        setTitle("Tic-Tac-Toe");
+        setLocationRelativeTo(null);
+        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+    }
+
+    public static void main(String[] args) {
+        EventQueue.invokeLater(() -> {
+            TicTacToeGui app = new TicTacToeGui();
+            app.setVisible(true);
+        });
+    }
+}