/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jpa.tools.swing;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.text.Document;
/**
* A TextPane where text that scrolls as new text is appended.
*
* @author Pinaki Poddar
*
*/
@SuppressWarnings("serial")
public class ScrollingTextPane extends JTextPane {
public void appendText(String text) {
if (text == null)
return;
try {
Document doc = getDocument();
setCaretPosition(doc.getLength());
replaceSelection(text);
Rectangle r = modelToView(doc.getLength());
if (r != null) {
scrollRectToVisible(r);
}
} catch (Exception e) {
}
}
public static void main(String[] args) throws Exception {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final ScrollingTextPane test = new ScrollingTextPane();
f.getContentPane().add(new JScrollPane(test));
f.pack();
f.setSize(600,450);
f.setVisible(true);
Timer timer = new Timer(1000, new ActionListener() {
SimpleDateFormat fmt = new SimpleDateFormat("HH:mm:ss");
@Override
public void actionPerformed(ActionEvent e) {
test.appendText(fmt.format(new Date()) + "\r\n");
}
});
timer.start();
}
}