import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class Crab here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */

public class Crab extends Actor
{
     GreenfootImage image1 = new  GreenfootImage("crab.png");
     GreenfootImage image2 = new  GreenfootImage("crab2.png");
     int count = 0;
     public Crab() {
          setImage(image1);
        }
    /**
     * Act - do whatever the Crab wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        // Add your action code here.
        move(4);
        keyControl();
        eat();
        switchImage();
        stop();
    } 
    public void switchImage() {
        if (getImage()==image1) {
            setImage(image2);
        }else{
            setImage(image1);
        }
    }
    public void eat () 
    {
           if (isTouching(Worm.class)) {
            removeTouching(Worm.class);
            Greenfoot.playSound("slurp.wav");
            count++;
            World w = getWorld();
            w.showText("吃虫数"+count,500,500);
            }
    }
    public void  keyControl()
    {
          if(Greenfoot.isKeyDown("left")) {
            turn(-15);
            }
            if(Greenfoot.isKeyDown("right")) {
            turn(15);
          }
    }
    public void stop() {
        if (count==3){
            Greenfoot.stop();
            World w = getWorld();
            GreenfootImage bg = w.getBackground();
            Font font = bg.getFont();
            font = font.deriveFont(150);
            bg.setFont(font);
            bg.setColor(Color.GREEN);
            bg.drawString("成功",180,280);
        }
    }
}