/*
 * $Id$
 *
 * Copyright (c) 2000-2003 by Rodney Kinney
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License (LGPL) as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, copies are available
 * at http://www.opensource.org.
 */
package VASSAL.counters;

import java.util.HashSet;
import java.util.Set;

import VASSAL.build.module.Map;

/**
 * Records the bounding boxes of GamePieces.  Use addPiece() to
 * record the bounding box of a GamePiece at a certain time.  Use
 * repaint() to repaint the appropriate areas of the maps to which the
 * added pieces belonged.
 */
public class BoundsTracker {
  private Set<Map> maps;

  public BoundsTracker() {
    maps = new HashSet<Map>();
  }

  public void clear() {
    maps.clear();
  }

  public void addPiece(GamePiece p) {
    if (p.getMap() != null) {
      maps.add(p.getMap());
    }
  }

  public void repaint() {
    for (Map m : maps) {
      m.repaint();
    }
  }
}