/**
* eobjects.org DataCleaner
* Copyright (C) 2010 eobjects.org
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.datacleaner.widgets;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import org.eobjects.datacleaner.panels.DCPanel;
import org.eobjects.datacleaner.util.DCDocumentListener;
import org.eobjects.datacleaner.util.SingleCharacterDocument;
import org.jdesktop.swingx.HorizontalLayout;
/**
* A widget used to display/edit a single char.
*
* @author Kasper Sørensen
*/
public class CharTextField extends DCPanel {
private static final long serialVersionUID = 1L;
private final JTextField _textField;
private final DCLabel _label;
public CharTextField() {
_textField = new JTextField(2);
_textField.setDocument(new SingleCharacterDocument());
_label = DCLabel.dark("");
addDocumentListener(new DCDocumentListener() {
@Override
protected void onChange(DocumentEvent e) {
Character value = getValue();
if (value == null) {
_label.setText("");
} else {
char c = value.charValue();
if (c == ' ') {
_label.setText("[whitespace]");
} else if (c == '\t') {
_label.setText("[tab]");
} else if (c == '\n') {
_label.setText("[newline]");
} else if (c == '\r') {
_label.setText("[carriage return]");
} else if (c == '\f') {
_label.setText("[form feed]");
} else if (c == '\b') {
_label.setText("[backspace]");
} else {
_label.setText(value.toString());
}
}
}
});
setLayout(new HorizontalLayout(2));
add(_textField);
add(_label);
}
public void addDocumentListener(DocumentListener documentListener) {
_textField.getDocument().addDocumentListener(documentListener);
}
public void removeDocumentListener(DocumentListener documentListener) {
_textField.getDocument().removeDocumentListener(documentListener);
}
public void setValue(Character value) {
if (value == null) {
_textField.setText("");
} else {
char c = value.charValue();
if ('\t' == c) {
_textField.setText("\\t");
} else if ('\n' == c) {
_textField.setText("\\n");
} else if ('\r' == c) {
_textField.setText("\\r");
} else if ('\f' == c) {
_textField.setText("\\f");
} else if ('\b' == c) {
_textField.setText("\\b");
} else {
_textField.setText(value.toString());
}
}
}
public Character getValue() {
String text = _textField.getText();
if (text == null || text.length() == 0) {
return null;
}
// check for common escaped conversions
if ("\\t".equals(text)) {
return '\t';
} else if ("\\n".equals(text)) {
return '\n';
} else if ("\\r".equals(text)) {
return '\r';
} else if ("\\f".equals(text)) {
return '\f';
} else if ("\\b".equals(text)) {
return '\b';
}
if (text.length() == 2) {
// first char is an escape char
return text.charAt(1);
}
return text.charAt(0);
}
}