InvulnerabilityManager.java

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

/**
 * Write a description of class InvulnerabilityManager here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class InvulnerabilityManager
{
 private Actor subject;
 private boolean isInvulnerable;
 private int framesCount;
 private int framesCountMax;
 private int flashCount;
 private int flashCountMax;
 
 public InvulnerabilityManager(Actor subject)
 {
 this.subject = subject;
 isInvulnerable = false;
 framesCount = 50;
 framesCountMax = 100;
 flashCount = 10;
 flashCountMax = 10;
 }
 
 public void setInvulnerable()
 {
 isInvulnerable = true;
 }
 
 public void setVulnerable()
 {
 isInvulnerable = false;
 }
 
 public boolean isInvulnerable()
 {
 return isInvulnerable;
 }
 
 private void flashTimer()
 {
 if(flashCount > 0)
 {
 flashCount--;
 }
 else
 {
 flashCount = flashCountMax;
 flash();
 }
 }
 
 private void flash()
 {
 GreenfootImage img = subject.getImage();
 if(img.getTransparency() == 255)
 {
 img.setTransparency(100);
 }
 else
 {
 img.setTransparency(255);
 }
 
 }
 
 public void manageInvulnerability()
 {
 if(framesCount > 0 && isInvulnerable)
 {
 framesCount--;
 flash();
 }
 else
 {
 framesCount = framesCountMax;
 isInvulnerable = false;
 subject.getImage().setTransparency(255);
 }
 }
}