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<html><head><title>Display page for TicTacToe at www.BruceEckel.com</title></head><FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>TicTacToe.java</H2><hr></FONT>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    width="200" height="100" align="baseline"
    codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
<PARAM NAME="code" VALUE="TicTacToe.class">
<PARAM NAME="codebase" VALUE=".">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2">
<COMMENT>
    <EMBED type="application/x-java-applet;version=1.2.2" 
       width="200" height="100" align="baseline" 
       code="TicTacToe.class" 
       codebase="."
       pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html">
    <NOEMBED>
    </COMMENT>
       No Java 2 support for APPLET!!
    </NOEMBED></EMBED>
</OBJECT>
<FONT SIZE="+3"><PRE><B>
//: c13:TicTacToe.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Demonstration of dialog boxes
// and creating your own components.
// &lt;applet code=TicTacToe
//  width=200 height=100&gt;&lt;/applet&gt;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.bruceeckel.swing.*;

public class TicTacToe extends JApplet {
  JTextField 
    rows = new JTextField("3"),
    cols = new JTextField("3");
  static final int BLANK = 0, XX = 1, OO = 2;
  class ToeDialog extends JDialog {
    int turn = XX; // Start with x's turn
    // w = number of cells wide
    // h = number of cells high
    public ToeDialog(int w, int h) {
      setTitle("The game itself");
      Container cp = getContentPane();
      cp.setLayout(new GridLayout(w, h));
      for(int i = 0; i &lt; w * h; i++)
        cp.add(new ToeButton());
      setSize(w * 50, h * 50);
      // JDK 1.3 close dialog:
      //#setDefaultCloseOperation(
      //#  DISPOSE_ON_CLOSE);
      // JDK 1.2 close dialog:
      addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent e){
          dispose();
        }
      });    
    }
    class ToeButton extends JPanel {
      int state = BLANK;
      public ToeButton() {
        addMouseListener(new ML());
      }
      public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int x1 = 0;
        int y1 = 0;
        int x2 = getSize().width - 1;
        int y2 = getSize().height - 1;
        g.drawRect(x1, y1, x2, y2);
        x1 = x2/4;
        y1 = y2/4;
        int wide = x2/2;
        int high = y2/2;
        if(state == XX) {
          g.drawLine(x1, y1, 
            x1 + wide, y1 + high);
          g.drawLine(x1, y1 + high, 
            x1 + wide, y1);
        }
        if(state == OO) {
          g.drawOval(x1, y1, 
            x1 + wide/2, y1 + high/2);
        }
      }
      class ML extends MouseAdapter {
        public void mousePressed(MouseEvent e) {
          if(state == BLANK) {
            state = turn;
            turn = (turn == XX ? OO : XX);
          } 
          else
            state = (state == XX ? OO : XX);
          repaint();
        }
      }
    }
  }
  class BL implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      JDialog d = new ToeDialog(
        Integer.parseInt(rows.getText()),
        Integer.parseInt(cols.getText()));
      d.setVisible(true);
    }
  }
  public void init() {
    JPanel p = new JPanel();
    p.setLayout(new GridLayout(2,2));
    p.add(new JLabel("Rows", JLabel.CENTER));
    p.add(rows);
    p.add(new JLabel("Columns", JLabel.CENTER));
    p.add(cols);
    Container cp = getContentPane();
    cp.add(p, BorderLayout.NORTH);
    JButton b = new JButton("go");
    b.addActionListener(new BL());
    cp.add(b, BorderLayout.SOUTH);
  }
  public static void main(String[] args) {
    Console.run(new TicTacToe(), 200, 100);
  }
} ///:~
</B></PRE></FONT></body></html>
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