import java.awt.*;
import java.awt.event.*;
import java.lang.Integer;
import java.util.Calendar;
import java.io.File;
import javax.swing.*;
import javax.swing.event.*;

/**
 * MessagesPane - Displays the messages sent by the other participants.
 *
 * @author Paul Kronenwetter
 * @author Jayme Manning
 *
 * <P ALIGN=CENTER><B>
 *                              Paul Kronenwetter<BR>
 * 				  Jayme Manning<BR>
 *                      Trade Secrets and/or Confidential<BR>
 *                      Commercial or Financial Information<BR>
 *                   Exempt From Disclosure Under the Freedom<BR>
 *                      of Information Act (5 USC 552(b)(3)<BR>
 *                  and 5 USC 552(b)(4)) and Under 18 USC 1905<BR>
 * </B></P>
 * <P ALIGN=CENTER>
 *                      <B>Proprietary Information Notice</B><BR>
 * <HL ALIGN=CENTER>
 * This document contains information proprietary to, and is the
 * sole property of, Paul Kronenwetter and Jayme Manning.  It shall not
 * be reproduced, used or disclosed in any manner or for any purpose 
 * not authorized in writing by both Paul Kronenwetter and 
 * Jayme Manning, and except, as retention may be so authorized, it
 * shall be returned to Paul Kronenwetter or Jayme Manning upon
 * request.</P>
 * <P ALIGN=CENTER><B>&copy 1998 by Paul Kronenwetter and Jayme
 * Manning<BR> All Rights Reserved</B></P>
 *
 * @version
 * $Revision: 1.6 $ <br>
 * $Date: 1998/12/17 17:13:09 $ <p>
 * 
 * <pre>
 * $Log: MessagesPane.java,v $
 * Revision 1.6  1998/12/17 17:13:09  cps606
 * Modified to deal with a cell render.
 *
 * Revision 1.5  1998/12/17 15:57:48  cps606
 * Changed from text area to list.
 *
 * Revision 1.4  1998/12/15 22:56:01  cps606
 * * Manually edited the comments to correct formatting.
 *
 * Revision 1.3  1998/12/15 00:07:58  cps606
 * * Cleaned up and added documentation.  Rearranged methods a little
 *   as seemed appropriate.
 *
 * Revision 1.2  1998/12/13 21:41:11  cps606
 * * Added getPreferredSize Method
 * * Removed Custom TextArea references.
 *
 * Revision 1.1  1998/12/12 03:22:11  kronenpj
 * * First CVS checkin.
 *
 * </pre>
 */

public class MessagesPane extends JPanel {
  private final String rcsId="$Id: MessagesPane.java,v 1.6 1998/12/17 17:13:09 cps606 Exp $";
  private int Rows,Columns;
  private Color bgColor=Color.white;
  private Color fgColor=Color.black;
  private JLabel paneLabel;
  private JList messagesArea;
  private JScrollPane scrollPane;
  // For the inner class's dealings...
  private Component draggedFrom, draggedTo;
  private JPanel northPanel, centerPanel;

  private DefaultListModel listModel;

  /**
   * Void constructor that calls realCtor.
   */
  public MessagesPane() {
    realCtor();
  }

  /**
   * Replies to requests for this component's preferred size.
   *
   * @return The preferred size of this panel in a Dimension.
   */
  public Dimension getPreferredSize()
  {
	return new Dimension(500,250);
  }

  /**
   * Method to re-initialize panel.  Probably not needed, except for
   * debugging purposes. 
   */
  public void reset() {
    init();
  }

// Start of private methods and classes.

  /**
   * This is the method that does the "real" work of setting up the
   * variables and other objects needed to make this panel work.
   */
  private void realCtor() {
    // Make the colors "sane"
    setForeground(fgColor);
    setBackground(bgColor);

    // Make sure this panel uses a BorderLayout.
    setLayout(new BorderLayout());

    // Set up the title bar...
    northPanel = new JPanel();
    paneLabel = new JLabel("Messages");
    northPanel.add(paneLabel);

    // Create the area for the actual messages...
    listModel = new DefaultListModel();
    messagesArea = new JList(listModel);
    scrollPane = new JScrollPane();
    messagesArea.setCellRenderer(new MessageCellRenderer(messagesArea));
    scrollPane.add(messagesArea);
    scrollPane.getViewport().setView(messagesArea);
    scrollPane.setVerticalScrollBarPolicy(
	JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);


    // Add these elements to the layout.
    add(northPanel,BorderLayout.NORTH);
    add(scrollPane,BorderLayout.CENTER); 
  }

  /**
   * addMessage - Method used to add a message to the List.
   *
   * @param message - JLabel containing message
   */
  public void addMessage(JLabel message)
  {
    listModel.addElement(message);
    messagesArea.validate();
  }

  /**
   * addMessage - Method used to add a message to the List.
   *
   * @param message - Message Panel.
   */
  public void addMessage(JTextArea message)
  {
    String x = message.getText();
    listModel.addElement(x);
    // messagesArea.validate();
  }

  /**
   * addMessage - Method used to add a message to the List.
   *
   * @param message - Message string.
   */
  public void addMessage(String message)
  {
    listModel.addElement(message);
    messagesArea.validate();
  }

  /**
   * Initialization method for the CalendarPane.  Also probably not
   * needed except for debugging.
   */
  private void init() {
    validate();
  }
}