controlpanel.java

利用java写的俄罗斯方块

/*
 * 控制面板类
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

class ControlPanel extends JPanel
{
 private TipBlockPanel tipBlockPanel;
 private JPanel tipPanel,InfoPanel,buttonPanel;
 private final JTextField levelField,scoreField;
 private JButton playButton,pauseButton,stopButton,
                 turnHarderButton,turnEasilyButton;
  private EtchedBorder border=new EtchedBorder(EtchedBorder.RAISED,Color.WHITE, new Color(148, 145, 140)) ;
  
  private RussiaBlocksGame game;
  private Timer timer;
   
 public ControlPanel(final RussiaBlocksGame game)
 {
  this.game = game;
  /*
   *图形界面部分
  */
  setLayout(new GridLayout(3,1,0,4));
  
  tipBlockPanel = new TipBlockPanel();
  tipPanel = new JPanel( new BorderLayout() );
  tipPanel.add( new JLabel("下一块:") , BorderLayout.NORTH );
  tipPanel.add( tipBlockPanel , BorderLayout.CENTER );
  tipPanel.setBorder(border);
  
  InfoPanel = new JPanel( new GridLayout(4,1,0,0) );
  levelField = new JTextField(""+RussiaBlocksGame.DEFAULT_LEVEL);
  levelField.setEditable(false);
  scoreField = new JTextField("0");
  scoreField.setEditable(false);
  InfoPanel.add(new JLabel("难度:"));
  InfoPanel.add(levelField);
  InfoPanel.add(new JLabel("分数:"));
  InfoPanel.add(scoreField);
  InfoPanel.setBorder(border);
  
  buttonPanel = new JPanel(new GridLayout(5,1,0,0));
  playButton = new JButton("开始");
  pauseButton = new JButton("暂停");
  stopButton = new JButton("停止");
  turnHarderButton = new JButton("增加难度");
  turnEasilyButton = new JButton("降低难度");
 
  buttonPanel.add(playButton);
  buttonPanel.add(pauseButton);
  buttonPanel.add(stopButton);
  buttonPanel.add(turnHarderButton);
  buttonPanel.add(turnEasilyButton);
   buttonPanel.setBorder(border);
   
   addKeyListener(new ControlKeyListener());//添加
   
   add(tipPanel);
   add(InfoPanel);
   add(buttonPanel);
 /*
  *添加事件监听器
  */ 
   playButton.addActionListener(
   new ActionListener()
   {
    public void actionPerformed(ActionEvent event)
    {
     game.playGame();
     requestFocus();//让ControlPanel重新获得焦点以响应键盘事件
    }
    });
    
    pauseButton.addActionListener(
    new ActionListener()
    {
     public void actionPerformed(ActionEvent event)
     {
      if(pauseButton.getText().equals("暂停"))
        game.pauseGame();
      else
        game.resumeGame(); 
      requestFocus();//让ControlPanel重新获得焦点以响应键盘事件
     }
    }
    );
    stopButton.addActionListener(
    new ActionListener()
    {
     public void actionPerformed(ActionEvent event)
     {
      game.stopGame();
      requestFocus();//让ControlPanel重新获得焦点以响应键盘事件
     }
    });
   turnHarderButton.addActionListener(
   new ActionListener()
   {
     public void actionPerformed(ActionEvent event)
     {
       int level = 0;
       try{
           level = Integer.parseInt(levelField.getText());
           setLevel(level + 1);
          }catch(NumberFormatException e)
          {
           e.printStackTrace();
          }
       requestFocus();//让ControlPanel重新获得焦点以响应键盘事件
     }
   });
   turnEasilyButton.addActionListener(
   new ActionListener()
   {
     public void actionPerformed(ActionEvent event)
     {
       int level = 0;
       try{
           level = Integer.parseInt(levelField.getText());
           setLevel(level - 1); 
          }catch(NumberFormatException e)
          {
           e.printStackTrace();
          }
      requestFocus();//让ControlPanel重新获得焦点以响应键盘事件
     }
   });
    /*
    *  时间驱动程序，每格500毫秒对level,score值进行更新
    */
   timer =  new Timer(500,
   new ActionListener()
   {
    public void actionPerformed(ActionEvent event)
    {
     scoreField.setText(""+game.getScore());
     game.levelUpdate();
    }
   }
   );
   timer.start();  
 }  
 /*
  * 设置预显方块的样式
  */
 public void setBlockStyle(int style)
 {
  tipBlockPanel.setStyle(style);
  tipBlockPanel.repaint();
 }  
 /*
  * 重置，将所有数据恢复到最初值
  */
 public void reset()
 {
  levelField.setText(""+RussiaBlocksGame.DEFAULT_LEVEL);
  scoreField.setText("0");
  setPlayButtonEnabled(true);
  setPauseButtonLabel(true);
  tipBlockPanel.setStyle(0);
 }
 
 /*
  *设置playButton是否可用
  */
 public void setPlayButtonEnabled(boolean enable)
 {
  playButton.setEnabled(enable);
 }
 
 /*
  *设置pauseButton的文本
  */
 public void setPauseButtonLabel(boolean pause)
 {
  pauseButton.setText( pause ? "暂停" : "继续" );
 } 
 
 /*
  *设置方块的大小,改变窗体大小时调用可自动调整方块到合适的尺寸
  */
 public void fanning()
 {
  tipBlockPanel.fanning();
 }   
 /*
  *根据level文本域的值返回当前的级别
  */
 public int getLevel()
  {
     int level = 0;
     try
     {
      level=Integer.parseInt(levelField.getText());
     }catch(NumberFormatException e)
     {
       e.printStackTrace();
     }
     return level;
  }
  /*
   * 设置level文本域的值
   */
  public void setLevel(int level)
  {
    if(level > 0 && level <= RussiaBlocksGame.MAX_LEVEL)
       levelField.setText("" + level);
  }   
  /*
   * 内部类 为预显方块的显示区域
   */
  private class TipBlockPanel extends JPanel
  {
    private Color bgColor = Color.darkGray, 
                  blockColor = Color.lightGray;              
    private RussiaBox [][]boxes = new RussiaBox[RussiaBlock.ROWS][RussiaBlock.COLS];
    private int boxWidth, boxHeight,style;
    private boolean isTiled = false;
    
    /*
     * 构造函数
     */
   public TipBlockPanel()
   {
    for(int i = 0; i < boxes.length; i ++)
       for(int j = 0; j < boxes[i].length; j ++)
         {
          boxes[i][j]=new RussiaBox(false);
         }
         style = 0x0000; 
   }
   /*
    * 构造函数
    */
   public TipBlockPanel(Color bgColor, Color blockColor)
   {
    this();
    this.bgColor = bgColor;
    this.blockColor = blockColor;
   }
    /*
     * 设置方块的风格
     */
    public void setStyle(int style)
    {
     this.style = style;
     repaint();
    }
    
    /*
     * 绘制预显方块
     */
   public void paintComponent(Graphics g)
   {
    super.paintComponent(g);
    
    int key = 0x8000;
    
    if(!isTiled)
       fanning();
    for(int i = 0; i < boxes.length; i ++)
      for(int j = 0; j<boxes[i].length ;j ++)
       {
         Color color = (style & key) != 0  ?  blockColor : bgColor;
         g.setColor(color);
         g.fill3DRect(j * boxWidth, i * boxHeight, boxWidth, boxHeight, true);  
         key >>=1;
       }
   }
   /*
    *设置方块的大小,改变窗体大小时调用可自动调整方块到合适的尺寸
    */
   
   public void fanning()
   {
    boxWidth = getSize().width / RussiaBlock.COLS;
    boxHeight = getSize().height /RussiaBlock.ROWS;
    isTiled=true;
   }
  }
  /*
   *内部类 键盘键听器,响应键盘事件
   */
  class ControlKeyListener extends KeyAdapter {
  public void keyPressed(KeyEvent ke) 
  {
   if (!game.isPlaying()) return;
      
   RussiaBlock block = game.getCurBlock();
   switch (ke.getKeyCode()) {
    case KeyEvent.VK_DOWN:
     block.moveDown();
     break;
    case KeyEvent.VK_LEFT:
     block.moveLeft();
     break;
    case KeyEvent.VK_RIGHT:
     block.moveRight();
     break;
    case KeyEvent.VK_UP:
     block.turnNext();
     break;
    case KeyEvent.VK_SPACE://一键到底
      while(block.moveDown())
      {  
      }
      break;
    default:
     break;
   }
  }
 }
}