gamingcanvas.java

来自「一款修改过的手机贪食蛇游戏」· Java 代码 · 共 99 行

/*
 * GamingCanvas.java
 *
 * Created on June 19, 2007, 1:02 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package hello;

import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;
import java.util.*;
import java.io.*;
import javax.microedition.media.*;
import javax.microedition.media.control.*;

/**
 *
 * @author jiabei
 */
public class GamingCanvas extends GameCanvas implements Runnable {
    
    private Map map;
    
    private Display display;
    private Canvas menuCanvas;
       
    
    private long frameDelay;    
    
    
    private boolean sleeping;
    int yPixels;
    int xPixels;
    
    /** Creates a new instance of GamingCanvas */
    public GamingCanvas(Display display, Canvas menuCanvas, long frameDelay, int maxFruitNum, int victoryFruitNum, int width, int height, int snakeNum, Snake[] snake, boolean canCollide) {
        super(true);
        this.display = display;
        this. menuCanvas  = menuCanvas;
        this.frameDelay = frameDelay;
        yPixels = this.getHeight() / height;
        xPixels = this.getWidth() / width;
        //System.out.println("" + this.getHeight() + "," + this.getWidth());
        map = new Map(maxFruitNum, victoryFruitNum, xPixels * width, yPixels * height, width, height, snakeNum, snake, canCollide);        
    }
    
    public void start() {
        sleeping = false;
        Thread t =  new Thread(this);
        t.start();        
    }
    
    public void stop() {
        sleeping = true;
        display.setCurrent(menuCanvas);
    }
    
    public void run() {
        Graphics g = getGraphics();
        while (!sleeping) {
            update();
            draw(g);
            try {
                Thread.sleep(frameDelay);                
            } catch (InterruptedException e) {            
            }
        }
    }
    
    public void update() {
        int keyState = getKeyStates();
        //System.out.println(keyState);
        int currentState = map.update(keyState);
        if (map.isOver()) {
            stop();
        }
    }
    
    private void draw(Graphics g) {
        Font font = Font.getDefaultFont();
        g.setColor(255, 255, 255);
        g.fillRect(0, 0, map.getPixelWidth(), map.getPixelHeight() + map.getSnakeNum() * font.getHeight());
        g.setColor(100, 0, 0);
        g.drawRect(0, 0, map.getPixelWidth(), map.getPixelHeight());
        for (int i = 0; i < map.getSnakeNum(); i ++) {
            map.getCurSnake(i).drawSnake(g, xPixels, yPixels, 1, font.getHeight() * i + map.getPixelHeight());
        }
        for (int i = 0; i < map.getFruitNum(); i ++) {
            map.getFruit(i).drawFruit(g, xPixels, yPixels);
        }
        flushGraphics();
    }   
    
    
}