/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* 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
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.tools;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTextField;
import javax.swing.event.ChangeListener;
/**
* A text field which allows to input (only) a single character.
*
* @author Tobias Malbrecht
*/
public class CharTextField extends JTextField {
private static final long serialVersionUID = 2226618111016685226L;
public CharTextField() {
super();
addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {}
@Override
public void keyReleased(KeyEvent e) {
setText(getText());
}
@Override
public void keyTyped(KeyEvent e) {}
});
addMouseListener(new MouseAdapter() {
@Override
public void mouseReleased(MouseEvent e) {
super.mouseReleased(e);
selectAll();
}
});
addFocusListener(new FocusListener() {
@Override
public void focusGained(FocusEvent e) {
selectAll();
}
@Override
public void focusLost(FocusEvent e) {
}
});
}
public CharTextField(char character) {
this();
setCharacter(character);
}
@Override
public void setText(String text) {
if (text.length() > 0) {
super.setText(text.substring(text.length() - 1));
}
selectAll();
}
public void setCharacter(char character) {
super.setText(String.valueOf(character));
selectAll();
}
public char getCharacter() {
return getText().charAt(0);
}
public boolean isSet() {
return getText().length() > 0;
}
public void addChangeListener(ChangeListener l) {
}
}