import java.awt.Panel;

public class BoundedBall extends Ball
{
  private Panel myWorld;

  public BoundedBall( int x, int y, int r, double dx, double dy, Panel f )
  {
    super( x, y, r, dx, dy );
    myWorld = f;
  }

  public void move()
  {
    super.move();

    int maxWidth  = myWorld.getWidth();
    if (( x() < 0 ) || ( x() > maxWidth ))
      reverseDeltaX();

    int maxHeight = myWorld.getHeight();
    if (( y() < 0 ) || ( y() > maxHeight ))
      reverseDeltaY();
  }
}