2 * Jalview - A Sequence Alignment Editor and Viewer (Version 2.5)
3 * Copyright (C) 2010 J Procter, AM Waterhouse, G Barton, M Clamp, S Searle
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
11 * Jalview is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
14 * PURPOSE. See the GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along with Jalview. If not, see <http://www.gnu.org/licenses/>.
20 import javax.swing.JTextArea;
21 import javax.swing.SwingUtilities;
23 import org.apache.log4j.WriterAppender;
24 import org.apache.log4j.spi.LoggingEvent;
27 * From http://textareaappender.zcage.com/ the means to capture the logs, too.
28 * Simple example of creating a Log4j appender that will write to a JTextArea.
30 public class JalviewAppender extends WriterAppender
33 static private JTextArea jTextArea = null;
35 /** Set the target JTextArea for the logging information to appear. */
36 static public void setTextArea(JTextArea jTextArea)
38 JalviewAppender.jTextArea = jTextArea;
42 * Format and then append the loggingEvent to the stored JTextArea.
44 public void append(LoggingEvent loggingEvent)
46 final String message = this.layout.format(loggingEvent);
48 // Append formatted message to textarea using the Swing Thread.
49 SwingUtilities.invokeLater(new Runnable()
53 if (jTextArea != null)
55 jTextArea.append(message);