gameuserinterface.java

一个java的游戏程序

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

/**
 * Sets up the menus and witch actions are to be performed if they
 * are clicked on, and starts the various games, it inherits from
 * Frame and uces an ActionListener.
 */

class GameUserInterface
    extends Frame 
    implements ActionListener 
{
    // data

    private Games _games;

    private RulesFrame _rulesWindow; 

    // menus

    private Menu _fileMenu;
    private MenuItem _newItem;
    private MenuItem _exitItem;

    private Menu _helpMenu;
    private Menu _aboutMenu;
    private MenuItem _rulesItem;
    private MenuItem _ticRulesItem;

    private Menu _gameMenu;
    private MenuItem _tictactoeItem;
    
    private MenuItem _aboutItem;

    final static String TICTACTOE;

    static 
    {
	TICTACTOE = "TicTacToe";
    }

    /**
     * Constructor that makes the window in which the games are played
     */
    public GameUserInterface()
    {
	setupMenuBar();
	_games = new Games();
	play("TicTacToe");
	setVisible(true);
    }

    /**
     * Sets up all the menus and their underlying menu items
     */
    public void setupMenuBar()
    {
	
	// menubar
	
	MenuBar _menuBar = new MenuBar();
	setMenuBar(_menuBar);
	
	// File menu

	_fileMenu = new Menu("File");
	_menuBar.add(_fileMenu);

	_newItem = new MenuItem("New");
	_fileMenu.add(_newItem);

	_exitItem = new MenuItem("Exit");
	_fileMenu.add(_exitItem);

	_fileMenu.addActionListener(this);

	// Help menu

	_helpMenu = new Menu("Help");
	_menuBar.add(_helpMenu);
	_menuBar.setHelpMenu(_helpMenu);
	_helpMenu.addActionListener(this);

	_rulesItem = new MenuItem("Rules");
	_helpMenu.add(_rulesItem);
	
	_aboutMenu = new Menu("About...");
	_helpMenu.add(_aboutMenu);

       	_aboutItem = new MenuItem("Created by Eelco Visser, 1999");
	_aboutMenu.add(_aboutItem);	

	// Game menu

	_gameMenu = new Menu("Games");
	_menuBar.add(_gameMenu);

	_tictactoeItem = new MenuItem(TICTACTOE);
	_gameMenu.add(_tictactoeItem);
	
	_gameMenu.addActionListener(this);

	// Window destroyer

	addWindowListener(new WindowDestroyer(this));
    }

    /* start a game */

    public void play(String name)
    {
	Game game;
	Dimension d;

	if(!(_games.isCurrent(name)))
	    {
		game = _games.getCurrent();
		if(game != null)
		    remove(game);
		
		game = _games.select(name);
		
		if(game != null)
		    {
			d = game.getSize();
			d.height = d.height + 50;
			setSize(d);
			
			add(game, "Center");
			setTitle(name);
		    }
	    }
    }

    /**
     * Sets up actions to be performed when mouseclicks are detected
     * on the menuitems.
     */
    public void actionPerformed(ActionEvent e)
    {
	if(e.getActionCommand() == "Exit")
	    {
		dispose();
		System.exit(0);
	    }
	else if(e.getActionCommand() == "New")
	    {
		if(_games.getCurrent() != null)
		    _games.getCurrent().newGame();
	    }
	else if(e.getActionCommand() == "About...")
	    {
	    }
	else if(e.getActionCommand() == "Rules")
	    {
		_rulesWindow = new RulesFrame(_games);
	    }
	else 
	    {
		play(e.getActionCommand());
	    }
    }
}