将canvas创建高级菜单(3)

3）Menu类
Java代码
import java.util.*; 
import javax.microedition.lcdui.*; 
import javax.microedition.lcdui.game.*; 
public class Menu { 
 private String leftOption; 
 private String rightOption; 
 private String cancelOption = "Cancel"; 
 private String[] menuOptions; 
 private int padding = 5; 
 //颜色设置 
 private static final int defaultFontColor = 0x000000; // 默认字体颜色 
 private static final int selectedFontColor=0xfff000;  //选中后字体颜色 
 private static final int bgColor = 0xCCCCCC;// 菜单背景色 
 private static final int highLight=0x0000ff;//选中的菜单高亮显示颜色 
  
 public Menu(String leftOption, String rightOption, String[] menuOptions) { 
  this.leftOption = leftOption; 
  this.rightOption = rightOption; 
  this.menuOptions = menuOptions; 
 } // end constructor 
 
 public void drawInactiveMenu(GameCanvas canvas, Graphics g) { 
  // create inactive menu font 
  Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, 
    Font.SIZE_MEDIUM); 
  int fontHeight = font.getHeight(); 
  // clear inactive menu background 
  int width = canvas.getWidth(); 
  int height = canvas.getHeight(); 
  g.setColor(bgColor); // grey color 
  g.fillRect(0, height - fontHeight - 2 * padding, width, height); 
  // draw left and right menu options 
  g.setFont(font); 
  g.setColor(defaultFontColor); // black 
  g.drawString(leftOption, padding, height - padding, g.LEFT | g.BOTTOM); 
  g.drawString(rightOption, width - padding, height - padding, g.RIGHT 
    | g.BOTTOM); 
  canvas.flushGraphics(); 
 } // end drawInactiveMenu 
 
 public void drawActiveMenu(GameCanvas canvas, Graphics g, 
   int selectedOptionIndex) { 
  Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, 
    Font.SIZE_MEDIUM); 
  int fontHeight = font.getHeight(); 
  int width = canvas.getWidth(); 
  int height = canvas.getHeight(); 
  g.setColor(bgColor); 
  g.fillRect(0, height - fontHeight - 2 * padding, width, height); 
  // draw default menu bar options 
  g.setFont(font); 
  g.setColor(0x000000); // black 
  g.drawString(leftOption, padding, height - padding, g.LEFT | g.BOTTOM); 
  // draw "Cancel" option 
  g.drawString(cancelOption, width - padding, height - padding, g.RIGHT