Title: ICGGSApplet
*Description: An applet that can run a game or show a movie
*Copyright: Copyright (c) 2005
* @author Cathy French * @version 1.1 2006 */ public class ICGGSApplet extends JApplet implements Runnable { // constants describing possible game states private static final int SHOW_MOVIE = 1; private static final int PLAY_GAME = 2; private static final int STOPPED = 3; private int gameState; // the current game state private String name; // the player's name private long frameStartTime; // the time the last frame was displayed private Thread gameLoop; // thread to run the game and movie // associated objects private Movie theMovie; // Panel to display the movie private MonsterGame theGame; // Panel to display the game private ICGGSPanel currentPanel; // the currently displayed Panel (can be null) /** * Called when applet is first loaded * sets up the attributes, load media, creates game objects * and sets up interface */ public void init() { // neither the movie nor the game is currently playing currentPanel = null; gameState = STOPPED; name = ""; // load up the audio files AudioClip theAudio = getAudioClip(getDocumentBase(), "../media/chimes.wav"); AudioClip laser1 = getAudioClip(getDocumentBase(), "../media/laser1.wav"); AudioClip laser2 = getAudioClip(getDocumentBase(), "../media/laser2.wav"); AudioClip laser3 = getAudioClip(getDocumentBase(), "../media/laser3.wav"); AudioClip laser4 = getAudioClip(getDocumentBase(), "../media/laser4.wav"); // create a media tracker to monitor the loading of the images MediaTracker theTracker = new MediaTracker(this); // load up the images for the movie Image movieImages[] = new Image[24]; for (int i=0; i<movieImages.length; i++) { movieImages = getImage(getDocumentBase(), "../media/movie" + (i+1) + ".gif"); theTracker.addImage(movieImages, i); } // load up the images for the munchie Image image1 = getImage(getDocumentBase(), "../media/munchie1.gif"); theTracker.addImage(image1, 4); Image image2 = getImage(getDocumentBase(), "../media/munchie2.gif"); theTracker.addImage(image2, 5); // load up the images for the player Image monster = getImage(getDocumentBase(), "../media/monster.gif"); theTracker.addImage(monster, 6); // load background image Image background = getImage(getDocumentBase(), "../media/background.png"); theTracker.addImage(background, 7); // wait for all the images to be loaded try { theTracker.waitForAll(); } catch (InterruptedException e) { } // create the movie object theMovie = new Movie(movieImages); // create the game object theGame = new MonsterGame(image1, image2, theAudio, laser1, laser2, laser3, laser4, monster); this.getContentPane().setBackground(Color.WHITE); // Initialise key-input functionality addKeyListener(new Input()); // add keyboard listener to applet //addMouseListener(this); // add mouse listener to applet } /** * Called when the Applet is ready to start executing */ public void start() { // ask the user for their name name = JOptionPane.showInputDialog(this, "What is your name?"); // start running the movie/game animation if (gameLoop == null) { gameLoop = new Thread(this); gameLoop.start(); } } /** * Called when the gameLoop thread is started * loops continuously until user quits */ public void run() { int input = Input.NONE; // game loop while (input != Input.QUIT) { // what is the current time? frameStartTime = System.currentTimeMillis(); input = checkInput(); if (gameState != STOPPED) // only necessary if the movie or game is showing { currentPanel.processInput(input); currentPanel.update(); currentPanel.repaint(); } else showStatus("Press 'G' to start game, 'V' to show movie"); frameDelay(10); } } /** * called when the Applet is stopped * stops the gameLoop thread */ public void stop() { if (gameLoop != null) { gameLoop.interrupt(); // stops the animation thread gameLoop = null; } } /** * called from the gameLoop * checks for the last key stroke input by the user * @return int - Input class constant representing user input */ public int checkInput() { int input = Input.checkUserInput(); switch (input) // how the input is handled depends on the current game state { case Input.GAME: // the user wants to play the game if (gameState == STOPPED) // not currently playing a game or movie { // display the panel showing the game currentPanel = theGame; this.getContentPane().add(BorderLayout.CENTER, currentPanel); this.validate(); // set up a new game theGame.resetGame(); gameState = PLAY_GAME; showStatus("Use W,A,S,D keys to move Ship, and B,N,M to fire Specials, Q key to stop"); } // otherwise ignore break; case Input.MOVIE: // the user wants to see the movie if (gameState == STOPPED) // not currently playing a game or movie { // display the panel showing the movie currentPanel = theMovie; this.getContentPane().add(BorderLayout.CENTER, currentPanel); this.validate(); gameState = SHOW_MOVIE; showStatus("Press Q key to stop"); } // otherwise ignore break; case Input.STOP: // the user wants to stop the movie or game being shown if (gameState == SHOW_MOVIE ) { this.getContentPane().remove(currentPanel); currentPanel = null; JOptionPane.showMessageDialog(this, "OK " + name + " I've stopped the movie"); } else if (gameState == PLAY_GAME) { this.getContentPane().remove(currentPanel); currentPanel = null; JOptionPane.showMessageDialog(this, "OK " + name + " I've stopped the game"); } gameState = STOPPED; showStatus("Press 'G' to start game, 'V' to show movie"); break; } Input.reset(); // reset the input module requestFocus(); this.repaint(); // redisplay the applet return input; // return for further processing (eg to control movement of Monster) } //public void mouseClicked(MouseEvent e) //{ //} /** * called from the gameLoop * pauses between frames * @param millis long - minimum frame time */ public void frameDelay(long millis) { long currentTime = System.currentTimeMillis(); // what time is it now? long elapsedTime = frameStartTime - currentTime; // how long has it been since the start of the frame? if (elapsedTime < millis) // is it time to showing the new frame yet? try { Thread.sleep(millis - elapsedTime); // pause for the remaining time } catch(Exception e) { } } /** * Put any clean-up code here */ public void finaliseGame() { } }
