ΠΑΝΕΠΙΣΤΗΜΙΟ ΜΑΚΕΔΟΝΙΑΣ » Ανάπτυξη Εκπαιδευτικών Παιχνιδιών με το Greenfoot

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

import java.awt.Color;

import java.awt.Graphics;

/**

 * Counter that displays a text and number.

 * 

 * @author Michael Kolling

 * @version 1.0.1

 */

public class Counter extends Actor

{

    private static final Color textColor = new Color(255, 180, 150);

    private int value = 0;

    private int target = 0;

    private String text;

    private int stringLength;

    public Counter()

    {

        this("");

    }

    public Counter(String prefix)

    {

        text = prefix;

        stringLength = (text.length() + 2) * 10;

        setImage(new GreenfootImage(stringLength, 16));

        GreenfootImage image = getImage();

        image.setColor(textColor);

        updateImage();

    }

    public void act() {

        if(value < target) {

            value++;

            updateImage();

        }

        else if(value > target) {

            value--;

            updateImage();

        }

    }

    public void add(int score)

    {

        target += score;

    }

    public int getValue()

    {

        return value;

    }

    /**

     * Make the image

     */

    private void updateImage()

    {

        GreenfootImage image = getImage();

        image.clear();

        image.drawString(text + value, 1, 12);

    }

}