MessageRenderer.java :  » Groupware » lucane » org » lucane » applications » forum » gui » Java Open Source

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lucane » org » lucane » applications » forum » gui » MessageRenderer.java
/*
 * Lucane - a collaborative platform
 * Copyright (C) 2004  Vincent Fiack <vfiack@mail15.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.lucane.applications.forum.gui;

import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;

import org.lucane.applications.forum.ForumPlugin;
import org.lucane.applications.forum.model.ForumMessage;

public class MessageRenderer extends DefaultTreeCellRenderer 
{
  private long lastRefresh;
  
  private Icon normalIcon;
  private Icon newIcon;
  private Icon deletedIcon;
  
  public MessageRenderer(ForumPlugin plugin, String forum) 
  {
    this.lastRefresh = plugin.getLastRefreshTime(forum);
    
    this.normalIcon = plugin.getImageIcon("normal.png");
    this.newIcon = plugin.getImageIcon("new.png");
    this.deletedIcon = plugin.getImageIcon("deleted.png");
  }
    
  public Component getTreeCellRendererComponent(JTree tree,
      Object value, boolean sel, boolean expanded, boolean leaf,
      int row, boolean hasFocus) 
  {
    JLabel label = (JLabel)super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
    
    //a few checks
    if(! (value instanceof DefaultMutableTreeNode))
      return label;
    
    DefaultMutableTreeNode node = (DefaultMutableTreeNode)value;
    if(! (node.getUserObject() instanceof ForumMessage))
      return label;
    
    //use a custom icon depending on the message date
    ForumMessage message = (ForumMessage)node.getUserObject();
    if(message.isVisible())
    {
      if(message.getDate().getTime() > lastRefresh)
        label.setIcon(newIcon);
      else
        label.setIcon(normalIcon);
    }
    else
      label.setIcon(deletedIcon);
        
    JLabel author = new JLabel("[" + message.getAuthor() + "]");
    author.setFont(label.getFont());
    author.setForeground(Color.GRAY);
    
    JPanel pnl = new JPanel(new BorderLayout());
    pnl.add(label, BorderLayout.CENTER);
    pnl.add(author, BorderLayout.EAST);
    pnl.setOpaque(false);
    
    return pnl;
  }  
}
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