defaultgameframe.java

利用BlueJ开发的一个类似小时候完的吃豆豆的小游戏

/*
 * cs101 DefaultGameFrame
 * $Id: DefaultGameFrame.java,v 1.2 2002/11/25 15:21:08 gus Exp $
 *
 * Developed for "Rethinking CS101", a project of Lynn Andrea Stein's AP Group.
 * For more information, see <a href="http://www.ai.mit.edu/projects/cs101/">the
 * CS101 homepage</a> or email <[e-mail]>.
 *
 * Copyright (C) 1999 Massachusetts Institute of Technology.
 * Please do not redistribute without obtaining permission.
 */

package cs101.awt;

import java.awt.*;
import java.awt.event.*;
import cs101.util.gamecontrol.GameControllable;


/** 
 * Simple top level Frame that deals with one component and sizing.
 *
 * <P>Copyright (c) 1999 Massachusetts Institute of Technology
 *
 * @author Paul K. Njoroge, [e-mail]
 * @author Lynn Andrea Stein, [e-mail]
 * @version $Id: DefaultGameFrame.java
 */
public class DefaultGameFrame extends Frame  {

  /** The Component (view) to display. */
  protected Component c;

  /** The controls for this component. */
  protected GameControllable gc ;

  /** Default Frame dimensions.  Initialized in constructor **/
  private Dimension defaultDimension = new Dimension(500,400);

  /** 
   * Creates a new frame relying on the supplied GameControllable to
   * provide its behavior.  If GameControllable is also a 
   * java.awt.Component, displays that component in this Frame.
   * 
   * Note:  This method does not show the frame.  To show the frame,
   * you must also call init().
   *
   * @see #init
   * @see #DefaultGameFrame( GameControllable, Component, Dimension )
   *
   * @param gc GameControllable to use; may also be Component to show.
   */
  public DefaultGameFrame( GameControllable gc )
  {
    this( gc, (( gc instanceof Component ) ? ((Component) gc) : null) );
  }

  /** 
   * Creates a new frame surrounding the supplied component and
   * relying on the GameControllable to provide its behavior.  
   * Does not show the frame.  To show the frame, use init().
   *
   * If no size is supplied, this is where the default dimensions of
   * this Frame are provided. 
   *
   * @see #init
   * @see #DefaultGameFrame( GameControllable, Component, Dimension )
   *
   * @param gc GameControllable that supplies its behavior.
   * @param c Component to display.  
   */
  public DefaultGameFrame(GameControllable gc,Component c)
  {
    this( gc, c, new Dimension(500,400) );
  }

  /** 
   * Creates a new frame of the specified size surrounding the
   * supplied component and relying on the GameControllable to provide
   * its behavior.  Does not show the frame.  To show the frame, use
   * init().
   *
   * @see #init
   * @see #DefaultGameFrame( GameControllable, Component, Dimension )
   *
   * @param gc GameControllable that supplies its behavior.
   * @param c Component to display.  
   * @param x preferred horizontal dimension of the Frame (in pixels) 
   * @param y preferred vertical dimension of the Frame (in pixels) 
   */
  public DefaultGameFrame(GameControllable gc, Component c, int x , int y)
  {
    this( gc, c, new Dimension(x,y) );
  }

  /** 
   * Creates a new frame of the specified size surrounding the
   * supplied component and relying on the GameControllable to provide
   * its behavior.  Does not show the frame.  To show the frame, use
   * init().
   *
   * @see #init
   *
   * @param gc GameControllable that supplies its behavior.
   * @param c Component to display.  
   * @param d preferred Dimension of the Frame (in pixels) 
   */
  public DefaultGameFrame( GameControllable gc, Component c, Dimension d ) 
  {
    super( "GameFrame" );

    this.c=c;
    this.gc = gc;
    this.defaultDimension=d;

    this.addWindowListener(new WindowAdapter() 
			   {
			     public void windowClosing(WindowEvent e) 
			       {
				 DefaultGameFrame.this.shutdown();
			       }
			   });
    
    MenuBar mbar = new MenuBar();
    Menu gameMenu = new Menu( "gameControl", true);

    gameMenu.add( createMenuItem ( "Start...", 
				   new ActionListener(){
      public void actionPerformed( ActionEvent event ) 
      {
	DefaultGameFrame.this.gc.start();
      }}) );
    
    gameMenu.add( createMenuItem ( "Stop....", 
				   new ActionListener(){
      public void actionPerformed( ActionEvent event ) 
      {
	DefaultGameFrame.this.gc.stop();
      }}) );
    
    gameMenu.add( createMenuItem ( "Reset...", 
				   new ActionListener(){
      public void actionPerformed( ActionEvent event ) 
      {
	DefaultGameFrame.this.gc.reset();
      }}) );
    
    /* gameMenu.add( createMenuItem ( "Pause...", 
				   new ActionListener(){
      public void actionPerformed( ActionEvent event ) 
      {
	DefaultGameFrame.this.gc.pause();
      }}) );
      */

    gameMenu.add( createCheckboxMenuItem ( "Pause...", 
				   new ItemListener(){
      public void itemStateChanged(ItemEvent event ) 
	{
	  CheckboxMenuItem item = (CheckboxMenuItem)event.getSource();
	  if (item.getState())
	    {
	      DefaultGameFrame.this.gc.pause();
	    }
	  else
	    {
	      DefaultGameFrame.this.gc.unpause();
	    }
	}}) );
    

    gameMenu.addSeparator(); 

    gameMenu.add( createMenuItem ( "Quit....", 
				   new ActionListener(){
      public void actionPerformed( ActionEvent event ) 
      {
	DefaultGameFrame.this.shutdown();
      }}) );
    
    mbar.add( gameMenu );
    this.setMenuBar( mbar );

    this.pack();
  }


  /**
   * private (macro-like) helper function to create and initialize the
   * menu items.
   *
   * @see #DefaultGameFrame( 
   * @param itemLabel  What this menu item is called
   * @param itemListener  Who this menu item should notify when selected
   */
  private final MenuItem createMenuItem( String itemLabel, 
				     ActionListener itemListener )
  {
    MenuItem theItem = new MenuItem( itemLabel );
    theItem.addActionListener( itemListener );
    return theItem ;
  }

   private final CheckboxMenuItem createCheckboxMenuItem( String itemLabel, 
				     ItemListener itemListener )
  {
    CheckboxMenuItem theItem = new CheckboxMenuItem( itemLabel );
    theItem.addItemListener( itemListener );
    return theItem ;
  }
  
  

  /**
   * Helper method for what to do when this window goes away....
   */
  protected void shutdown()
  {
    this.dispose();
    System.exit(0);
  }

  /**
   * Make the frame appear 
   */
  public void init() {
    this.add("Center",c);
    this.show();
  }

    
  /** 
   * This method overrides Frame's default getPreferredSize() in case
   * component doesn't specify its own preferences.  Without this
   * method, the DefaultFrame has a disconcerting tendency to paint
   * itself into a tiny little corner....
   *
   * @see java.awt.Frame#getPreferredSize()
   *
   * @return the default dimension supplied to (or by) the constructor 
   */
  public Dimension getPreferredSize()
  {
    return this.defaultDimension;
  }

}

/*
 * $Log: DefaultGameFrame.java,v $
 * Revision 1.2  2002/11/25 15:21:08  gus
 * fix javadoc error.
 *
 * Revision 1.1.1.1  2002/06/05 21:56:32  root
 * CS101 comes to Olin finally.
 *
 * Revision 1.5  2000/04/30 02:33:50  mharder
 * Changed import statements to confirm to new cs101 packages.
 *
 * Revision 1.4  1999/08/16 16:56:48  jsmthng
 * Updated to make JavaDoc happy.
 *
 * Revision 1.3  1999/08/04 21:35:15  pnjoroge
 * I added a pause checkbox function onto the gamecontrol menu items list.
 * To pause one clicks on the checkbox and to unPause one clicks it again.
 *
 * Revision 1.2  1999/07/27 18:55:54  las
 * Patched up DefaultFrame (mostly docs) and DefaultGameFrame (aesthetics
 * and docs).
 *
 * Capitalized the name of the GameControllable interface.
 *
 * Moved the other four interfaces (Pausable, Resetable, Startable,
 * Stoppable) to cs101.util as they really have nothing to do w/awt or
 * windowing in particular.
 *
 * Also, added unpause() to Pausable as it doesn't make much sense to be
 * able to pause but not unpause something.
 *
 * Revision 1.1  1999/07/13 20:42:49  pnjoroge
 * This is a new implementation of DefaultGameFrame. The frame has
 * four functionalities that have to be implemented by the user . This
 * include start, stop, reset and pause.
 * 
 */