attpanel.java

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package system;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

//游戏的属性面板类
public class AttPanel
    extends JPanel {
  private MainFrame mainFrame;
  private NamePanel namePanel; //绘制游戏名称的面板
  private LevelScorePanel LSPanel;
  private ButtonPanel buttonPanel; //含有控制游戏的开始，暂停，继续按钮的面板

  //把ButtonPanel类里的三个按钮在这里声明，
  //为了使程序能从MainFrame类里调用，从而设置是否可用状态
  private JButton start = new JButton("开始");
  private JButton stop = new JButton("暂停");
  private JButton goOn = new JButton("继续");

  //显示难度等级和得分的文本域
  JTextField levelField = new JTextField(3);
  JTextField scoreField = new JTextField(9);

  public AttPanel(MainFrame frame) {
    this.mainFrame = frame;

    this.namePanel = new NamePanel();
    this.LSPanel = new LevelScorePanel(this);
    this.buttonPanel = new ButtonPanel(this);

    JPanel topPanel = new JPanel();
    topPanel.setLayout(new BorderLayout());
    JSplitPane top = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
                                    this.namePanel,this.LSPanel);
    top.setDividerLocation(80);
    top.setDividerSize(0);
    topPanel.add(top);

    JPanel bottomPanel = new JPanel();
    bottomPanel.setLayout(new BorderLayout());
    JSplitPane bottom = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
                                       this.buttonPanel,new JPanel());
    bottom.setDividerLocation(35);
    bottom.setDividerSize(0);
    bottomPanel.add(bottom);

    JSplitPane s = new JSplitPane(JSplitPane.VERTICAL_SPLIT,topPanel,bottomPanel);
    s.setDividerLocation(200);
    s.setDividerSize(0);

    this.setLayout(new BorderLayout());
    this.add(s);
  }

  public JButton getStartButton() {
    return this.start;
  }

  public JButton getStopButton() {
    return this.stop;
  }

  public JButton getGoOnButton() {
    return this.goOn;
  }

  public JTextField getLevelField() {
    return this.levelField;
  }

  public JTextField getScoreField() {
    return this.scoreField;
  }

  public MainFrame getMainFrame() {
    return this.mainFrame;
  }

  //显示难度等级
  public void setLevel(int level){
    this.levelField.setText(level+"");
  }

  //显示得分
  public void setScore(int score){
    this.scoreField.setText(score+"");
  }
}

//=========================绘制游戏名称的内部面板类=================================
class NamePanel
    extends JPanel {
  public NamePanel() {
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;

    //===========================绘制游戏名称字符===============================
    int width = getWidth();
    int height = getHeight();

    g2.setFont(new Font("Dialog", Font.BOLD, 36)); //设置绘制字符串的字体
    FontMetrics fm = g2.getFontMetrics();
    int ascent = fm.getAscent();
    int descent = fm.getDescent();
    int length = fm.stringWidth(Config.GAME_NAME);

    int x = (width - length) / 2;
    int y = (height - (ascent + descent)) / 2 + ascent;

    //绘制带阴影效果的字符串
    g2.setColor(new Color(0, 0, 0, 200)); //字符串背景色
    g2.drawString(Config.GAME_NAME, x, y);
    g2.setColor(Color.red); //字符串前景色--红色
    g2.drawString(Config.GAME_NAME, x - 2, y - 2);

    //=======================绘制作者字符串===============================
    g2.setFont(new Font("Dialog", Font.PLAIN, 12));
    fm = g2.getFontMetrics();
    length = fm.stringWidth("华游工作室");
    x = (width - length) / 2;
    y += 20;
    g2.setColor(Color.BLACK);

    g2.drawString("华游工作室", x, y);
  }
}

//=======================显示得分和难度等级的面板==============================
class LevelScorePanel
    extends JPanel {
  private JTextField levelField;
  private JTextField scoreField;
  private GridBagConstraints g = new GridBagConstraints();

  public LevelScorePanel(AttPanel p) {
    setLayout(new GridBagLayout());

    add(new JLabel("难度等级"),0,0,1,1);

    levelField = p.getLevelField();
    levelField.setEditable(false);
    levelField.setHorizontalAlignment(JTextField.RIGHT);
    levelField.setOpaque(false);
    levelField.setFocusable(false);
    levelField.setForeground(Color.red);
    levelField.setText(p.getMainFrame().getLevel() + "");
    add(levelField,1,0,1,1);

    add(new JLabel("得  分"),2,0,1,1);

    scoreField = p.getScoreField();
    scoreField.setEditable(false);
    scoreField.setHorizontalAlignment(JTextField.RIGHT);
    scoreField.setOpaque(false);
    scoreField.setForeground(Color.blue);
    scoreField.setFocusable(false);
    scoreField.setText(p.getMainFrame().getScore() + "");
    add(scoreField,3,0,1,1);
  }

  public void add(Component c, int x, int y,int w,int h){
    g.gridx = y;
    g.gridy = x;
    g.gridwidth = w;
    g.gridheight = h;
    g.weightx = 0;
    g.weighty = 0;
    add(c,g);
  }
}

//====================带有开始，暂停，继续三个按钮的内部面板类=========================
class ButtonPanel
    extends JPanel {
  public ButtonPanel(final AttPanel p) {
    FlowLayout f = new FlowLayout(FlowLayout.LEFT);
    setLayout(f); //设置布局为向左对齐的流布局

    JButton start = p.getStartButton();
    start.setFocusable(false);
    start.setToolTipText("开始新游戏,热键为" + KeyEvent.getKeyText(Config.START));
    start.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        p.getMainFrame().startNewGame();
      }
    });

    JButton stop = p.getStopButton();
    stop.setFocusable(false);
    stop.setToolTipText("暂停游戏,热键为" + KeyEvent.getKeyText(Config.STOP));
    stop.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        p.getMainFrame().stopGame();
      }
    });

    JButton goOn = p.getGoOnButton();
    goOn.setFocusable(false);
    goOn.setToolTipText("继续游戏,热键为" + KeyEvent.getKeyText(Config.CONTINUE));
    goOn.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        p.getMainFrame().continueGame();
      }
    });

    add(start);
    add(stop);
    add(goOn);

    stop.setEnabled(false);
    goOn.setEnabled(false);
  }
}