//gamecCanvans.java
package games;
import java.lang.System.*;
import java.util.Random;
import java.util.Vector;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
* <p>标题: Canvas测试</p>
* <p>描述: 游戏的界面</p>
* <p>版权: 2003 </p>
* <p>公司: none</p>
* @author 刘昆
* @version 1.0*/
/**游戏动作类*/
class gameCanvas
extends Canvas
implements CommandListener {
/**黑*/
private static final int BLACK = 0x00000000;
/**白*/
private static final int WHITE = 0x00FFFFFF;
/**红*/
private static final int RED = 0x00FF0000;
/**蓝*/
private static final int BLUE = 0x000000FF;
/**没有移动的标志*/
private static final int NO_MOVE = -1;
/**主窗体类*/
private final control midlet;
/**逻辑类*/
private final gamelogic game;
/**退出菜单*/
private final Command exitCommand;
/**重新开始菜单*/
private final Command newGameCommand;
/**随机数*/
private final Random random = new Random();
/**屏幕宽度*/
private int screenWidth;
/**屏幕高度*/
private int screenHeight;
/**boardCellSize 正方形单元格的大小,
* boardTop 棋盘top的位置,
* boardLeft 棋盘left位置*/
private int boardCellSize, boardTop, boardLeft;
/**preCursorPosition 前一次光标选择的位置,cursorPosition 当前光标选择的位置*/
private int preCursorPosition, cursorPosition;
/**用于存储被标记的地雷的位置 */
private Vector BombVector = new Vector();
private boolean isRestart;
/**构造器
* @param midlet 主窗体类 */
public gameCanvas(control midlet) {
this.midlet = midlet;
game = new gamelogic(random);
initializeBoard();
/**初始化菜单*/
exitCommand = new Command("退出", Command.EXIT, 1);
newGameCommand = new Command("新游戏", Command.SCREEN, 2);
addCommand(exitCommand);
addCommand(newGameCommand);
setCommandListener(this);
/**开始游戏*/
initialize();
}
/**添加一个地雷位置标记
*@param matrix 位置标记 */
private void addBomb(int matrix) {
BombVector.addElement(Integer.toString(matrix));
}
/**删除一个地雷位置标记
*@param matrix 位置标记 */
private void delBomb(int matrix) {
BombVector.removeElement(Integer.toString(matrix));
}
/**搜索该位置是否被标记
* @param matrix 位置标记
* @return boolean 该位置是否被记录,false为被记录 */
private boolean searchBomb(int matrix) {
return BombVector.indexOf(Integer.toString(matrix)) == -1;
//-1表示没有找到该位置的信息
}
/**初始化屏幕,取得棋盘的初始位置*/
private void initializeBoard() {
screenWidth = getWidth();
//取得屏幕宽度
screenHeight = getHeight();
//取得屏幕高度
if (screenWidth > screenHeight) {
boardCellSize = (screenHeight - 1) / 8;
boardLeft = (screenWidth - (boardCellSize * 8)) / 2;
boardTop = 1;
}
else
{
boardCellSize = (screenWidth - 1) / 8;
boardLeft = 1;
boardTop = (screenHeight - boardCellSize * 8) / 2;
}
}
/** 初始化游戏和屏幕. 使游戏重新启动*/
private void initialize() {
preCursorPosition = cursorPosition = 0;
game.setNewGame();
game.InitArray();
isRestart = true;
BombVector.removeAllElements();
repaint();
}
/**重画canvas
* @param g 重画的Graphics对象*/
public void paint(Graphics g) {
game.isWin();
if (!game.isGameOver()) {
paintGame(g);
}
else
{
paintGameOver(g);
}
}
/**游戏未结束时的重画动作
* @param g 重画的Graphics对象*/
private void paintGame(Graphics g) {
if (isRestart) {
/*清除画板*/
g.setColor(0xbbbbbb);
g.fillRect(0, 0, screenWidth, screenHeight);
drawBoard(g);
paintAll(g);
//System.out.println("sss");//test
drawBombTag(g);
}
drawCursor(g);
}
/**游戏结束时的重画动作,画出游戏统计结果
* @param g 重画的Graphics对象 */
private void paintGameOver(Graphics g) {
if (game.isGameOver()) {
if (game.isWin()) {
GameOver(g);
}
else
{
for (int i = 0;
i < 8;
i++) {
for (int j = 0;
j < 8;
j++) {
if (game.getBomb(i * 8 + j) == 20) {
drawCircle(g, i * 8 + j);
}
}
}
}
}
}
/**游戏结束时的重画动作
* @param g 重画的Graphics对象 */
private void GameOver(Graphics g) {
String tallyMsg = "你赢了,恭喜!";
Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,
Font.SIZE_LARGE);
int strHeight = font.getHeight();
int tallyMsgWidth = font.stringWidth(tallyMsg);
int strWidth = tallyMsgWidth;
/*计算绘制文本的起始位置*/
int x = (screenWidth - strWidth) / 2;
x = x < 0 ? 0 : x;
int y = (screenHeight - 2 * strHeight) / 2;
y = y < 0 ? 0 : y;
/* 清除画板*/
g.setColor(WHITE);
g.fillRect(0, 0, screenWidth, screenHeight);
/* 画出文本结果*/
g.setColor(RED);
g.drawString(tallyMsg, x + 5, (y + 1 + strHeight),
(Graphics.TOP | Graphics.LEFT));
}
/**监听器响应接口
* @param c 命令
* @param d 消息源 */
public void commandAction(Command c, Displayable d) {
if (c == exitCommand) {
midlet.quit();
}
else
if (c == newGameCommand) {
initialize();
}
}
/** 画圆,表示地雷位置
* @param g 图形物件
* @param matrix 位置*/
private void drawCircle(Graphics g, int matrix) {
int x, y;
y = matrix / 8;
x = matrix % 8;
g.setColor(RED);
g.fillArc(x * boardCellSize + boardLeft + 3,
y * boardCellSize + boardTop + 2, boardCellSize - 2,
boardCellSize - 2, 0, 360);
}
/** 画叉,表示地雷爆炸
* @param g 图形物件
* @param x x坐标
* @param y y坐标 */
private void drawCross(Graphics g, int x, int y) {
g.setColor(RED);
g.drawLine(x + 1 + boardLeft, y + boardTop,
x + boardCellSize - 4 - 4 + boardLeft,
y + boardCellSize - 5 + boardTop);
g.drawLine(x + 1 + boardLeft, y + boardCellSize - 5 + boardTop,
x + boardCellSize - 4 - 4 + boardLeft, y + boardTop);
}
/**根据玩家和电脑的移动重画棋盘*/
private voiddo
PlayerMove() {
if (game.isFree(cursorPosition)) {
game.openpan(cursorPosition);
}
repaint();
//画出移动的图形结果
}
/**重画所有被揭开的文字
* @param g 图形物件 */
private void paintAll(Graphics g) {
for (int i = 0;
i < 8;
i++) {
for (int j = 0;
j < 8;
j++) {
if (game.getBomb(i * 8 + j) >= 10 &&
game.getBomb(i * 8 + j) < 20) {
paintNum(g, i * 8 + j);
}
}
}
}
/**画出文字
* @param g 图形物件
* @param matrix 位置 */
private void paintNum(Graphics g, int matrix) {
int i, j, s;
Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,
Font.SIZE_SMALL);
s = game.getBomb(matrix);
//System.out.println(s);
i = matrix / 8;
j = matrix % 8;
g.setColor(WHITE);
if (this.searchBomb(matrix)) {
if (s != 20) {
g.drawString(String.valueOf(s - 10), boardLeft + j * boardCellSize + 5,
boardTop + i * boardCellSize - 2,
(Graphics.TOP | Graphics.LEFT));
}
}
}
/**捕获按键消息
* @param keyCode 按键代码 */
protected void keyPressed(int keyCode) {
/**当游戏结束时返回*/
if (game.isGameOver()) {
return;
}
int gameAction = getGameAction(keyCode);
switch (gameAction) {
case FIRE:
if (searchBomb(cursorPosition)) { //如果该位置被做出了地雷标志,则该位置不能被揭开
do
PlayerMove();
}
break;
case RIGHT:
do
MoveCursor(1, 0);
break;
casedo
WN:
do
MoveCursor(0, 1);
break;
case LEFT:
do
MoveCursor( -1, 0);
break;
case UP:
do
MoveCursor(0, -1);
break;
default:
if (searchBomb(cursorPosition)) {
addBomb(cursorPosition);
}
else
{
delBomb(cursorPosition);
}
repaint();
break;
}
}
/**画出棋盘上的地雷标志
* @param g 图形物件 */
private void drawBombTag(Graphics g) {
int s, j, k;
g.setColor(RED);
for (int i = 0;
i < BombVector.size();
i++) {
s = Integer.parseInt( (String) BombVector.elementAt(i));
j = s % 8;
k = s / 8;
g.drawString("!", boardLeft + j * boardCellSize + 7,
boardTop + k * boardCellSize - 2,
(Graphics.TOP | Graphics.LEFT));
}
}
/**指定棋盘上的坐标
* @param dx 左右偏移量x
* @param dy 上下偏移量y */
private voiddo
MoveCursor(int dx, int dy) {
int newCursorPosition = cursorPosition + dx + 8 * dy;
if ( (newCursorPosition >= 0) &&
(newCursorPosition < 64)) {
preCursorPosition = cursorPosition;
cursorPosition = newCursorPosition;
repaint();
}
}
/** 在棋盘上画出选择光标
* @param g 图形物件 */
private void drawCursor(Graphics g) {
/** 清除之前的选择光标*/
g.setColor(0xbbbbbb);
g.drawRect( ( (preCursorPosition % 8) * boardCellSize) + 3 + boardLeft,
( (preCursorPosition / 8) * boardCellSize) + 1 + boardTop,
boardCellSize - 2, boardCellSize - 2);
/**在当前选择位置画出选择光标*/
g.setColor(this.BLUE);
g.drawRect( ( (cursorPosition % 8) * boardCellSize) + 3 + boardLeft,
( (cursorPosition / 8) * boardCellSize) + 1 + boardTop,
boardCellSize - 2, boardCellSize - 2);
}
/** 画出空位置
* @param g 图形物件 */
private void drawNull(Graphics g) {
/**在当前选择位置画出选择光标*/
g.setColor(this.WHITE);
g.fillRect( ( (cursorPosition % 8) * boardCellSize) + 3 + boardLeft,
( (cursorPosition / 8) * boardCellSize) + 1 + boardTop,
boardCellSize - 2, boardCellSize - 2);
}
/**画一个盘
* @param g 图形物件 */
private void drawBoard(Graphics g) {
/** 清除盘*/
g.setColor(0xbbbbbb);
g.fillRect(0, 0, screenWidth, screenHeight);
/**画盘*/
g.setColor(BLACK);
for (int i = 0;
i < 9;
i++) {
g.fillRect(boardLeft + 2, boardCellSize * i + boardTop,
(boardCellSize * 8) + 1, 1);
/*画四条黑色的横线*/
g.fillRect(boardCellSize * i + boardLeft + 2, boardTop, 1,
boardCellSize * 8);
/*画四条黑色的竖线*/
}
}
}
