import com.genuts.gameui.*;

/**
 * SpriteWrapper with the ability to move a sprite with a constant
 * speed.
 */
public class MovingWrapper extends MovingSpriteWrapper {

  /**
   * X speed
   */
  private int xspeed;

  /**
   * Y speed
   */
  private int yspeed;

  /**
   * Initializes the moving sprite with an action sprite
   * and a given speed
   * @param sprite Sprite for visualisation
   * @param vx Speed for X coordinates
   * @param vy Speed for Y coordinates
   */
  public MovingWrapper(Sprite sprite, int vx, int vy) {
    super(sprite);
    xspeed = vx;
    yspeed = vy;
    setBackgroundSprite(true);
  }


  /**
   * Moves the sprite with the current speed
   * @param ticks Number of ticks from the playfield
   */
  public void move(int ticks) {
    getFinalWrapper().setPosition(getX()+xspeed, getY()+yspeed);
  }

  /**
   * Receives the event that this sprite is collision
   * with another sprite
   * @param s Sprite with which the collision is
   */
  public void collisionWith(Sprite s) {
    if (s == null) {
      if ((getX() < 0) || ((getX() + getWidth()) > getParent().getWidth())) {
	xspeed *= -1;
	getFinalWrapper().setPosition(getX() + xspeed, getY());
      }
      if ((getY() < 0) || ((getY() + getHeight()) > getParent().getHeight())) {
	yspeed *= -1;
	getFinalWrapper().setPosition(getX(), getY() + yspeed);
      }
    }
    super.collisionWith(s);
  }
}