📄 gamecanvas.java
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/*
* GameCanvas.java
*
* Copyright 2001 SkyArts. All Rights Reserved.
*/
import javax.microedition.lcdui.*;
import java.util.Timer;
/**
* NumberSliderPuzzle的游戏内容描绘与操作所用的类
*
* @author Hideki Yonekawa
* @version 1.0
*/
class GameCanvas extends Canvas implements Runnable, CommandListener {
/** 存放宽度的变量 */
private int screenWidth;
/** 存放高度的变量 */
private int screenHeight;
/** 存放NumberSliderPuzzle对象的变量 */
private NumberSliderPuzzle sliderPuzzle;
/** 暂停状态所用的标志 */
private boolean isPaused;
/** Start指令变量 */
private Command startCmd = new Command("Start", Command.SCREEN, 5);
/** Exit指令变量 */
private Command exitCmd = new Command("Exit", Command.SCREEN, 1);
/** Pause指令变量 */
private Command pauseCmd = new Command("Pause", Command.SCREEN, 5);
/** Resume指令变量 */
private Command resumeCmd = new Command("Resume", Command.SCREEN, 5);
/** Quit指令变量 */
private Command quitCmd = new Command("Quit", Command.SCREEN, 1);
/** 储存默认字体的变量 */
private Font defFont = Font.getDefaultFont();
/** 储存解谜所需时间的变量 */
private long timeLong;
/** 操作所需时间的计时器时所使用的Timer变量 */
private Timer timer = null;
/** 储存各关卡谜题资讯的变量 */
private static final short[][] QUESTION_PIECES = new short[][] {
{ //关卡1的谜题
1, 5, 9, 13,
2, 6, 10, 14,
3, 7, 11, 15,
4, 8, 12, -1
},
{ //关卡2的谜题
4, 3, 2, 1,
8, 7, 6, 5,
12, 11, 10, 9,
15, 13, 14, -1
},
{ //关卡3的谜题
12, 8, 4, 1,
15, 9, 5, 2,
13, 10, 6, 3,
14, 11, 7, -1
},
{ //关卡4的谜题
14, 15, 12, 13,
8, 9, 10, 11,
4, 5, 6, 7,
1, 2, 3, -1
},
{ //关卡5的谜题
14, 12, 15, 13,
11, 10, 9, 8,
7, 6, 5, 4,
3, 2, 1, -1
}
};
/** 储存现在关卡的变量 */
private int stage;
/** 储存最高关卡数的常量 */
private static final int MAX_STAGE = QUESTION_PIECES.length;
/** 代表拼图板的列（纵向）数的常量 */
private static final int COLUMN_LENGTH = 4;
/** 代表拼图板的行（横向）数的常量 */
private static final int ROW_LENGTH = 4;
/** 代表拼图片的横宽的常量 */
private static final int PIECE_WIDTH = 25;
/** 代表拼图片的高度的常量 */
private static final int PIECE_HEIGHT = 25;
/** 储存显示于画面的拼图板资讯的变量 */
private short[] pieces = new short[COLUMN_LENGTH * ROW_LENGTH];
/** 储存现在空白空间的Index的变量 */
private short spaceIndex;
/** 代表标题显示状态的常量 */
private static final short TITLE = 0;
/** 代表关卡开始显示状态的常量 */
private static final short STAGE_START = 1;
/** 代表关卡显示状态的常量 */
private static final short STAGE_PLAYING = 2;
/** 代表关卡结束显示状态的常数 */
private static final short STAGE_END = 5;
/** 代表过关显示状态的常量 */
private static final short STAGE_CLEAR = 7;
/** 代表全关卡过关显示状态的常量 */
private static final short ALL_STAGE_CLEAR = 9;
/** 储存现在之显示状态的变量 */
private short gameState;
/** 储存标题所使用图像的变量 */
private Image titleImg;
/**
* 构造函数
* @param sliderPuzzle NumberSliderPuzzle
*/
GameCanvas(NumberSliderPuzzle sliderPuzzle) {
this.sliderPuzzle = sliderPuzzle;
//画面的描绘范围的取得
screenWidth = getWidth();
screenHeight = getHeight();
//登录注册Command listener
setCommandListener(this);
//取得标题图像
try {
titleImg = Image.createImage("/title.png");
}catch(Exception e) {}
//游戏的状态指定为显示标题
gameState = TITLE;
}
/** 将使用在各关卡的变量加以初始化的方法 */
private void doGameInit() {
stage = 1;
isPaused = false;
doStageInit();
timeLong = 0;
}
/** 将使用在各关卡的变量加以初始化的方法 */
private void doStageInit() {
//设定各关卡的谜题
System.arraycopy(QUESTION_PIECES[stage -1], 0, pieces, 0, pieces.length);
//将空白空间放到右下
spaceIndex = (short)(pieces.length -1);
}
/** MIDlet的startApp()被调用出来时所调用的方法 */
void doStartApp() {
//根据现在的状态来选择运作
switch(gameState) {
case TITLE: //显示标题时
doTitle();
break;
case STAGE_START: //关卡开始时
case STAGE_PLAYING: //关卡中
//暂停
isPaused = true;
//以防万一先删除关卡中的指令
removeCommand(pauseCmd);
removeCommand(resumeCmd);
//新增Resume指令
addCommand(resumeCmd);
break;
default: //上述以外的时候
//解除暂停
isPaused = false;
break;
}
}
/** MIDlet的pauseApp()被调用出来时所调用的方法 */
void doPauseApp() {
switch(gameState) {
case TITLE: //标题显示时
break;
default: //上述以外的时候
//暂停
doTimerStop();
isPaused = true;
break;
}
}
/** 进行标题显示的方法 */
private void doTitle() {
//将游戏的状态显示在标题上
gameState = TITLE;
//以防万一先删除关卡中的指1令
removeCommand(pauseCmd);
removeCommand(resumeCmd);
removeCommand(quitCmd);
//显示标题画面
repaint();
//新增指令
addCommand(exitCmd);
addCommand(startCmd);
}
/** 调用到计时器的方法 */
void addSec() {
//增加计时器的计数让其再描绘
timeLong++;
repaint();
}
/** 启动描绘线程的方法 */
private void doThreadStart() {
new Thread(this).start();
}
/** 启动计时器的方法 */
private void doTimerStart() {
//计时器不是null的时候就启动计时器
if(timer == null) {
GameTimer gameTimer = new GameTimer(this);
timer = new Timer();
timer.schedule(gameTimer, 1000, 1000);
}
}
/** 停止计时器的方法 */
private void doTimerStop() {
//计时器不是null的时候就停止计时器
if(timer != null) {
timer.cancel();
timer = null;
}
}
/** 进行暂停或重新开始的方法 */
private void doPauseOrResume() {
if(isPaused) {
//暂停时
//重新开始
isPaused = false;
doTimerStart();
}else {
//不是暂停时
//进行暂停
isPaused = true;
doTimerStop();
}
repaint();
}
/** 进行描绘的方法 */
protected void paint(Graphics g) {
//将背景以白色清除
g.setColor(0x00FFFFFF);
g.fillRect(0, 0, screenWidth, screenHeight);
g.setFont(defFont);
String drawSt;
int drawX, drawY, stWidth;
int stHeight = defFont.getHeight();
//根据游戏状态变更描绘内容
switch(gameState) {
case TITLE://显示标题时
//描绘标题图像
drawX = (screenWidth - titleImg.getWidth()) /2;
g.drawImage(titleImg, drawX, 0, Graphics.TOP|Graphics.LEFT);
//着作权的显示
g.setColor(0x00000000);
drawSt = "Copyright 2001";
drawX = (screenWidth - defFont.stringWidth(drawSt)) / 2;
drawY = getHeight() - stHeight *2;
g.drawString(drawSt, drawX, drawY, Graphics.TOP|Graphics.LEFT);
drawSt = "SkyArts.com";
drawX = (screenWidth - defFont.stringWidth(drawSt)) / 2;
drawY = drawY + stHeight;
g.drawString(drawSt, drawX, drawY, Graphics.TOP|Graphics.LEFT);
return;
case STAGE_START://关卡开始时
//描绘舞台开始画面
g.setColor(0x00000000);
drawSt = "Stage " + String.valueOf(stage);
stWidth = defFont.stringWidth(drawSt);
drawX = (screenWidth - stWidth) / 2;
drawY = (screenHeight - (stHeight * 2)) / 2;
g.drawString(drawSt, drawX, drawY, Graphics.TOP|Graphics.LEFT);
drawSt = "Start!!";
stWidth = defFont.stringWidth(drawSt);
drawX = (screenWidth - stWidth) / 2;
g.drawString(drawSt, drawX, drawY + stHeight, Graphics.TOP|Graphics.LEFT);
return;
default:
//关卡中、关卡结束时、过关时、全部过关时
//描绘外框
int widSize = ROW_LENGTH * (PIECE_WIDTH +2);
int heiSize = COLUMN_LENGTH * (PIECE_HEIGHT +2);
g.setColor(0x0000FFFF);
g.drawRect(1, screenHeight -heiSize -2, widSize, heiSize);
g.setColor(0x000000FF);
g.drawRect(0, screenHeight -heiSize -3, widSize +2, heiSize +2);
g.setColor(0x00000000);
//描绘计时器
int hour = (int)(timeLong / 3600);
int minute = (int)((timeLong - (hour * 3600)) / 60);
String minuteSt = String.valueOf(minute);
minuteSt = (minuteSt.length() < 2 ? "0"+minuteSt : minuteSt);//加上0变成两位数
int sec = (int)(timeLong - (hour * 3600) - (minute * 60));
String secSt = String.valueOf(sec);
secSt = (secSt.length() < 2 ? "0"+secSt : secSt);//加上0变成两位数傞
drawSt = String.valueOf(hour) + ":" + minuteSt + ":" + secSt;
stWidth = defFont.stringWidth(drawSt);
g.drawString(drawSt, (screenWidth-stWidth) / 2, 0, Graphics.TOP|Graphics.LEFT);
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