Problem with my Breakout clone

[Andrew Johnson]

Well, I am almost complete with this project except for one thing. My key event handler isnt working. I am using the Space bar to switch from the title screen to the game itself, and the p key to pause and unpause the game. But neither one is working. Here is the code. If anyone could help it would be great.

 
import java.awt.*;
import java.applet.*;
 
public class BrickBlast extends Applet implements Runnable{

//Set up instance variables
//Double buffer varibales
Image dbImg;
Graphics dbG;
 

int mouseX;
int mouseY;
 
int score;
 
int stateOfGame;
final int gameLoading= 0;
final int gameInit= 1;
final int gameTitlescreen= 2;
final int gameInprogress= 3;
final int gamePaused= 4;
final int gameOver= 5;

final int numBricks = 81;
final int speed = 10;

//Colors
Color bgColor = new Color(0,0,0);
Color textColor = new Color(255,255,255);
 
//Thread varibales
Thread gameRunner;


//Instantiate my Classes
Paddle paddle1;
Ball ball_1;
Brick block[];


public void init() {

int i;

//Set the initial State of the Game
stateOfGame = gameTitlescreen;
 
//Set the Backgound color
setBackground(bgColor);
 
//Set up Double Buffering
dbImg = createImage(size().width, size().height);
dbG = dbImg.getGraphics();
 
//initialise the bricks
block = new Brick[numBricks];
initBricks();

//Make the Paddle and the Ball
ball_1 = new Ball(size().width, size().height, 1, this);
paddle1 = new Paddle(size().width, size().height, 1, this);
 
score = 0;
}

public void initBricks() {

final int brickMaxHP = 1;
int brickHP;
int brickSpacingXInit = 1;
int brickSpacingX = brickSpacingXInit;
int brickSpacingY = 2;
int brickX = 1;
int brickY = 25;

for( int i = 0; i < numBricks; i++ ) {

brickHP = brickMaxHP;
block[i] = new Brick(size().width, size().height, brickX, brickY, brickHP);

//GO to the next column
brickX = brickX + brickSpacingX + block[i].sizeX;

//Go to the next Row
if ((brickX + block[i].sizeX + brickSpacingX) > block[i].appSizeX) {
brickY = brickY + brickSpacingY + block[i].sizeY;
brickX = brickSpacingXInit;
}
}
}

public void start() { 

if (gameRunner == null) {
 
gameRunner = new Thread(this);
gameRunner.start();
}
 

} 
 
public void stop() { 

if (gameRunner != null) {

gameRunner.stop();
gameRunner = null;
}
} 

public void update(Graphics g) {

//Paint the Screen
paint(g);
}

public void run(){

while (true) {

//Game is On
if (stateOfGame == gameInprogress) {
 
//brick collision detect
boolean noMoreBricks = true;
for( int i = 0; i < numBricks; i++ ) {
if (block[i].hitPoint > 0) {

score += block[i].collisionDetection(ball_1);
noMoreBricks = false;
}
}
 
//Have all the bricks been destroyed
if (noMoreBricks == true) {

stateOfGame = gameOver;
}
 
paddle1.MovePaddle(mouseX);
 
paddle1.BoundaryCollisionDetect();
score += ball_1.BoundaryCollisionDetect(paddle1);
score += ball_1.PaddleCollisionDetect(paddle1);

ball_1.MoveBall();
 
//Check for Game Over
if (ball_1.lives <= 0) {

stateOfGame = gameOver;
}
}


//Game is Paused
else if (stateOfGame == gamePaused){

}


//Game is Loading
else if (stateOfGame == gameLoading) {
 
}

//Game is initialisling
else if (stateOfGame == gameInit) {
 
//Reinititalise the bricks
initBricks();
 
//Reinit Paddle
ball_1.lives = 3;
score = 0;
 
ball_1.velX = -4;
ball_1.velY = -4;
 
stateOfGame = gameInprogress;
 
}

//Game is on the title screen
else if (stateOfGame == gameTitlescreen) {

}
 
//Game is over
else if (stateOfGame == gameOver) {

}

repaint();
try { Thread.sleep(speed); }
catch (InterruptedException e) {}
 
}

}

public void sprite(Graphics g) {

 
//Clear the Backbuffer
g.setColor(bgColor);
g.fillRect(0, 0, size().width, size().height);

if (stateOfGame == gameInprogress || stateOfGame == gamePaused){

//paint the bricks to the back buffer
for( int i = 0; i < numBricks; i++ ) {

if (block[i].hitPoint > 0)
block[i].Draw(g);
}
 
//paint the other sprites
ball_1.Draw(g);
paddle1.Draw(g);
 
//paint the HighScore
g.setColor(textColor);
dbG.drawString("Score : " + score, 4,14);
 
//paint the Number of Lives
g.setColor(textColor);
dbG.drawString("Lives : " + ball_1.lives, 350,14);
 
if (stateOfGame == gamePaused) {

g.drawString("Game Paused", 200,250);
}
}

//Game is over
else if (stateOfGame == gameOver) {

g.setColor(textColor);
g.drawString("Game Over, You scored " + score, 150,150);
g.drawString("Press Space Bar to Continue", 150,170);
}

//Game is Starting
else if (stateOfGame == gameTitlescreen) {

//g.drawImage(titleImg, 0, 0, size().width, size().height, this);
 
g.setColor(textColor);
g.drawString("Welcome to Brick Blast", 150,150);
g.drawString("Press Space Bar to Begin", 150,170);
}
 
}

public boolean mouseMove(Event evt, int x, int y) {

mouseX = x;
mouseY = y;
return true;
}

public boolean mouseDrag(Event evt, int x, int y) {

mouseX = x;
mouseY = y;
return true;
}

public boolean keyDown( Event event, int key) {

int char_P = 80;
int char_p = 112;
int char_Space = 32;

//Pause the Game
if (key == char_p || key == char_P) {

if (stateOfGame == gameInprogress) 
stateOfGame = gamePaused;
else if (stateOfGame == gamePaused) 
stateOfGame = gameInprogress;
}
 
//Go to the Titles
if (key == char_Space && stateOfGame == gameOver) {

stateOfGame = gameTitlescreen;
}

//Go to the game init 
else if (key == char_Space && stateOfGame == gameTitlescreen) {

stateOfGame = gameInit;
}
 

 
return true;
}

public void paint(Graphics g) {
//paint the Sprites
sprite(dbG);
 
//paint the backbuffer to the primary buffer
g.drawImage(dbImg, 0, 0, this);

}
}

[Steven Bell]

I could be missing something, but I don't see any class that is implementing MouseListener, or being registed as a Listener.

[Richard Davies]

I think Steven is right - you haven't implemented the MouseListener or KeyListener interfaces.

[Steven Bell]

I meant KeyListener, but I don't see the MouseListener either.