/*
 * Jalview - A Sequence Alignment Editor and Viewer
 * Copyright (C) 2006 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */
package jalview.gui;

import jalview.datamodel.*;

import java.awt.*;

import java.util.*;


/**
 * DOCUMENT ME!
 *
 * @author $author$
 * @version $Revision$
 */
public class PaintRefresher
{
    static Hashtable components = new Hashtable();

    /**
     * DOCUMENT ME!
     *
     * @param comp DOCUMENT ME!
     * @param al DOCUMENT ME!
     */
    public static void Register(Component comp, AlignmentI al)
    {
        if (components.containsKey(al))
        {
            Vector comps = (Vector) components.get(al);
            comps.addElement(comp);
        }
        else
        {
            Vector vcoms = new Vector();
            vcoms.addElement(comp);
            components.put(al, vcoms);
        }
    }

    /**
     * DOCUMENT ME!
     *
     * @param al DOCUMENT ME!
     */
    public static void Refresh(AlignmentI al)
    {
        Refresh(null, al);
    }

    /**
     * DOCUMENT ME!
     *
     * @param c DOCUMENT ME!
     * @param al DOCUMENT ME!
     */
    public static void Refresh(Component c, AlignmentI al)
    {
        Component temp;
        Vector coms = (Vector) components.get(al);
        if(coms==null)
          return;

        Enumeration e = coms.elements();

        while (e.hasMoreElements())
        {
            temp = (Component) e.nextElement();

            if (!temp.isValid())
            {
                coms.removeElement(temp);
            }
            else if (temp == c)
            {
                continue;
            }
            else
                temp.repaint();
        }
    }
}