Explosion.java

/*
 * Copyright © 2011 Nokia Corporation. All rights reserved.
 * Nokia and Nokia Connecting People are registered trademarks of Nokia Corporation.
 * Oracle and Java are trademarks or registered trademarks of Oracle and/or its
 * affiliates. Other product and company names mentioned herein may be trademarks
 * or trade names of their respective owners.
 * See LICENSE.TXT for license information.
 */

package com.nokia.example.battletank.game.entities;

import com.nokia.example.battletank.game.Resources;
import javax.microedition.lcdui.game.Sprite;

public class Explosion extends Entity {
    private volatile boolean start = false;

    public Explosion(Resources r) {
        super(r.gridSizeInPixels*4, r.gridSizeInPixels*4, r);
    }

    protected Sprite createSprite() {
        Sprite s = new Sprite(resources.explosion, width, height);
        s.setVisible(false);
        return s;
    }

    public void refresh() {
        super.refresh();
        if(sprite.isVisible()) {
            if(sprite.getFrame() == sprite.getFrameSequenceLength() - 1) {
                sprite.setVisible(false);
            } else {
                sprite.nextFrame();
            }
        }
        if(start) {
            start = false;
            sprite.setVisible(true);
            sprite.setFrame(0);
        }
    }

    public void show(int centerX, int centerY) {
        setPosition(centerX - width/2, centerY - height/2);
        start = true;
    }
}