//
// FILE:     BoundedBall
// AUTHOR:   Eugene Wallingford 
// DATE:     2012/10/02
// COMMENT:  a Ball that bounces off the sides of its Frame
//           implemented during Session 13
//
// MODIFIED: 2012/10/20 -- Eugene Wallingford
// CHANGE:   Changed the deltaX and deltaY variables to be doubles,
//           to match the modified Ball class.
//
// MODIFIED: 2012/10/31 -- Eugene Wallingford
// CHANGE:   Added accessor for subclass.
//

import java.awt.Frame;

public class BoundedBall extends Ball
{
  private Frame myWorld;

  public BoundedBall( int x, int y, int r, double dx, double dy, Frame 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();
  }
  
  protected Frame frame()
  {
    return myWorld;
  }
}