maincanvas.java

J2me类windows 菜单的实现,以及拼图游戏

//J2ME MIDlet 程序设计
//主画面
//翁荣建
//2005-06-11
//mainCanvas.java
package gamepuzzle;
import javax.microedition.lcdui.*;
import menu.*;
import game.gameBoard;
public class mainCanvas extends Canvas implements CommandListener {
  //Canvas
  private Command Menucommand;
  private Font font;
  private Image image;
  private gameBoard GM;
  //private CreateImage createImage;

  private Image[] img;
  public static mainCanvas instance;

  //menuGroup1 主菜单组及成员的声明
   private MenuGroup menuGroup1;
   private int menuGroup1Left;
   private int menuGroup1Top;
   private int menuGroup1Width;
   private int menuGropu1Length;
         //主菜单组共有6个成员
   private Menu menuGroup1Menu1;
   private Menu menuGroup1Menu2;
   private Menu menuGroup1Line1;//水平线
   private Menu menuGroup1Menu3;
   private Menu menuGroup1Line2;//水平线
   private Menu menuGroup1Menu4;
   //menuGroup2 子菜单组1及成员的声明
   private MenuGroup menuGroup2;
   private int menuGroup2Left;
   private int menuGroup2Top;
   private int menuGroup2Width;
   private int menuGropu2Length;
          //子菜单组1共有两个成员
   private Menu menuGroup2Menu1;
   private Menu menuGroup2Menu2;
   //menuGroup3 子菜单组2及成员的声明
   private MenuGroup menuGroup3;
   private int menuGroup3Left;
   private int menuGroup3Top;
   private int menuGroup3Width;
   private int menuGropu3Length;
           //子菜单组2共有4个成员
   private Menu menuGroup3Menu1;
   private Menu menuGroup3Line1;//水平线
   private Menu menuGroup3Menu2;
   private Menu menuGroup3Menu3;

  public mainCanvas() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }


  private void jbInit() throws Exception {
    setCommandListener(this);
    addCommand(Menucommand=new Command("菜单",Command.OK,1));
    font=Font.getFont(Font.FACE_PROPORTIONAL,Font.STYLE_PLAIN,Font.SIZE_SMALL);
    GM=new gameBoard();
    instance=this;
          image=Image.createImage("/icon/icon1.png");

          img=new Image[7];
          img[0]=CreateImage.instance.getImage("/icon/App.png");
          img[1]=CreateImage.instance.getImage("/icon/PushPuzzle.png");
          img[2]=CreateImage.instance.getImage("/icon/text_ico.png");
          img[3]=CreateImage.instance.getImage("/icon/earth_ico.png");
          img[4]=CreateImage.instance.getImage("/icon/Desktop.png");
          img[5]=CreateImage.instance.getImage("/icon/ManyBalls.png");
          img[6]=CreateImage.instance.getImage("/icon/virtualpc_ico.png");


         //menuGroup1 构造主菜单主
         this.menuGroup1Left   = 5;
         this.menuGroup1Top    = this.getHeight()-4*3-3*2-18*4;
         this.menuGroup1Width  = 80;
         this.menuGropu1Length = 6;//6个成员
         this.menuGroup1 = new MenuGroup(menuGroup1Left,menuGroup1Top,menuGroup1Width,menuGropu1Length);
                     //构造出6个成员
         this.menuGroup1Menu1 = new Menu(img[0],"开始游戏 >");
         this.menuGroup1Menu2 = new Menu(img[1],"游戏设置 >");
         this.menuGroup1Line1 = new Menu();//水平线
         this.menuGroup1Menu3 = new Menu(img[2],"关于游戏...");
         this.menuGroup1Line2 = new Menu();//水平线
         this.menuGroup1Menu4 = new Menu("退出游戏");//没图标的菜单项
                     //加入菜单组中
         this.menuGroup1.Add(this.menuGroup1Menu1);
         this.menuGroup1.Add(this.menuGroup1Menu2);
         this.menuGroup1.Add(this.menuGroup1Line1);
         this.menuGroup1.Add(this.menuGroup1Menu3);
         this.menuGroup1.Add(this.menuGroup1Line2);
         this.menuGroup1.Add(this.menuGroup1Menu4);
                     //设主菜单组为不可见
         this.menuGroup1.setVisable(false);

         //menuGroup2 构造子菜单组1
         this.menuGroup2Width = 72;
         this.menuGroup2Left = this.menuGroup1Left + this.menuGroup1Width - 4;
         if (this.menuGroup2Left + this.menuGroup2Width > this.getWidth() - 1)//如果菜单的右端超出了手机Screen的右端
         {this.menuGroup2Left = this.getWidth() - this.menuGroup2Width - 4;
         }
         this.menuGroup2Top    = this.menuGroup1Top + 2;
         this.menuGropu2Length = 2;
         this.menuGroup2 = new MenuGroup(menuGroup2Left,menuGroup2Top,menuGroup2Width,menuGropu2Length);

          //构造成员
         this.menuGroup2Menu1 = new Menu(img[3],"新游戏");
         this.menuGroup2Menu2 = new Menu("载入游戏");

         //加入菜单组中
         this.menuGroup2.Add(this.menuGroup2Menu1);
         this.menuGroup2.Add(this.menuGroup2Menu2);

         //menuGroup3  构造子菜单组2
        this.menuGroup3Width = 80;
        this.menuGroup3Left  = this.menuGroup1Left+this.menuGroup1Width-4;
        if (this.menuGroup3Left + this.menuGroup3Width > this.getWidth()-1)//如果菜单的右端超出了手机Screen的右端
        {this.menuGroup3Left = this.getWidth()-this.menuGroup3Width-4;
        }
        this.menuGroup3Top    =this.menuGroup1Top+20;
        this.menuGropu3Length =4;
        this.menuGroup3 = new MenuGroup(menuGroup3Left,menuGroup3Top,menuGroup3Width,menuGropu3Length);
        //构造4个成员
        this.menuGroup3Menu1 = new Menu(img[4],"场影设置...");
        this.menuGroup3Line1 = new Menu();
        this.menuGroup3Menu2 = new Menu(img[5],"声音设置...");
        this.menuGroup3Menu3 = new Menu(img[6],"语言设置...");
        //加入菜单组中
        this.menuGroup3.Add(this.menuGroup3Menu1);
        this.menuGroup3.Add(this.menuGroup3Line1);
        this.menuGroup3.Add(this.menuGroup3Menu2);
        this.menuGroup3.Add(this.menuGroup3Menu3);

        this.menuGroup3Menu2.setEnabled(false);

  }
  public void commandAction(Command command, Displayable displayable) {
    if (command == Menucommand)
    { this.menuGroup1.setVisable(!this.menuGroup1.getVisable());//按一次Menucommand打开主菜单,再一次关闭
      this.menuGroup1.setFocus(true);//当打开主菜单时,把焦点设在主菜单上
      this.menuGroup2.setFocus(false);//其它子菜单的焦点设为false
      this.menuGroup3.setFocus(false);
      if(!this.GM.instance.hasGameStore())
         this.menuGroup2Menu2.setEnabled(false);
       else this.menuGroup2Menu2.setEnabled(true);

      this.repaint();//每按一次Menucommand,从画Screen
    }
    }
/////////////////////////////////////////////////////////////////////////
 protected void paint(Graphics g) {
    //字体
    g.setFont(font);
    //兰色背景
    g.setColor(133,179,241);
    g.fillRect(0,0,this.getWidth(),this.getHeight());
    //在Screen的最中间画背景图
    g.drawImage(image,(this.getWidth()-image.getWidth())/2,(this.getHeight()-image.getHeight())/2,g.TOP|g.LEFT);

    if(this.menuGroup1.getVisable())//如果主菜单为可见.注意:只设了主菜单可见和不可见,其它子菜单都是可见的
    {//菜单的焦点只能存在一个菜单组中,而不能共存.也就是说有一个的菜单组 焦点 为true,其它的菜单焦点都为false

      menuGroup1.Display(g,font);//显示主菜单
     if(this.menuGroup2.getFocus())//如果当前焦点在子菜单1上,子菜单1是打开的
     {menuGroup2.Display(g,font);//显示子菜单1
     }
     if(this.menuGroup3.getFocus())//如果当前焦点在子菜单2上
     {menuGroup3.Display(g,font);//显示子菜单2
     }
    }
}
////////////////////////////////////////////////////
 protected void keyPressed(int keyCode) {
     switch(keyCode) {
       case -5://OK键
       case -10://电话拨号键
         if(menuGroup1.getFocus()&&menuGroup1.getVisable())
         {//如果主菜单可见且在焦点上
           //设其它焦点为false
           menuGroup2.setFocus(false);menuGroup3.setFocus(false);
           switch(menuGroup1.getSelectIndex())//对主菜单的selectIndex做选择
           {case 0:
               //打开子菜单1
               menuGroup2.setFocus(true);
               menuGroup1.setFocus(false);
               break;
            case 1:
              //打开子菜单2
              menuGroup3.setFocus(true);
              menuGroup1.setFocus(false);
              break;
            case 3:
              //显示about对话框
              Display.getDisplay(puzzleMIDlet.instance).setCurrent(puzzleMIDlet.instance.about);
              this.menuGroup1.setVisable(false);
              break;
            case 5:
              //退出程序
              puzzleMIDlet.quitApp();
           }
         }
         else if(menuGroup2.getFocus())//如果子菜单1在焦点上
         { //设其它的焦点为false
           menuGroup1.setVisable(false);menuGroup2.setFocus(false);
           switch(menuGroup2.getSelectIndex())//对子菜单1的selectIndex进行选择
           {case 0:
               Display.getDisplay(puzzleMIDlet.instance).setCurrent(this.GM=new gameBoard());
               break;
            case 1:
              GM.loadGame();
               Display.getDisplay(puzzleMIDlet.instance).setCurrent(GM);
              break;
           }
         }
        else if(menuGroup3.getFocus())//子菜单2在焦点上
        {
          switch(menuGroup3.getSelectIndex())
          {case 0:if(this.menuGroup3Menu1.getEnabled())
                 {menuGroup1.setVisable(false);menuGroup3.setFocus(false);
                 }

               break;
             case 2:if(this.menuGroup3Menu1.getEnabled())
                  {menuGroup1.setVisable(false);menuGroup3.setFocus(false);
                  }

              break;
            case 3:if(this.menuGroup3Menu1.getEnabled())
                 {menuGroup1.setVisable(false);menuGroup3.setFocus(false);
                 }

             break;
          }

         }
           break;
       case -1://UP键
         //按UP键
         if(this.menuGroup1.getFocus())//焦点在主菜单上
          {menuGroup1.changeSelectMenu(keyCode);
          }
          else if(this.menuGroup2.getFocus())//焦点在子菜单1上
          {menuGroup2.changeSelectMenu(keyCode);
          }
          else if(this.menuGroup3.getFocus())//焦点在主菜单2上
         {menuGroup3.changeSelectMenu(keyCode);
         }
         break;
       case -2://DOWN键
         //按向下键
         if(this.menuGroup1.getFocus())//焦点在主菜单上
         {menuGroup1.changeSelectMenu(keyCode);
          }
          else if(this.menuGroup2.getFocus())//焦点在子菜单1上
          {menuGroup2.changeSelectMenu(keyCode);
          }
          else if(this.menuGroup3.getFocus())//焦点在主菜单2上
         {menuGroup3.changeSelectMenu(keyCode);
         }

       break;
       case -3://左键
         if(this.menuGroup2.getFocus()|this.menuGroup3.getFocus())
         {//如果焦点在子菜单上,取消焦点,把焦点设在主菜单上
           this.menuGroup2.setFocus(false);
           this.menuGroup3.setFocus(false);
           this.menuGroup1.setFocus(true);
         }break;

       case -4://右键

         if(menuGroup1.getFocus()&&menuGroup1.getVisable())
         {//如果主菜单可见且在焦点上
           //设其它焦点为false
           menuGroup2.setFocus(false);menuGroup3.setFocus(false);
           switch(menuGroup1.getSelectIndex())//对主菜单的selectIndex做选择
           {case 0:
               //打开子菜单1
               menuGroup2.setFocus(true);
               menuGroup1.setFocus(false);
               break;
            case 1:
              //打开子菜单2
              menuGroup3.setFocus(true);
              menuGroup1.setFocus(false);
              break;
            }
         }
     }
         this.repaint();
   }
}