/* class ConstrainedTextField
*
* Copyright (C) 2001 R M Pitman
*
* 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 charva.awt.util;
import charva.awt.Toolkit;
import charva.awt.event.KeyEvent;
/**
* The ConstrainedTextField is a subclass of CapsTextField that limits
* the length of the text.
*/
public class ConstrainedTextField
extends CapsTextField
{
/**
* Use this constructor when you want to leave the text field empty
* but set its length.
*/
public ConstrainedTextField(int length_) {
super(length_);
}
/**
* Use this constructor when you want to set both the initial value and the
* length.
*/
public ConstrainedTextField(String text_, int length_) {
super(text_, length_);
}
/**
* Check the length of the text before calling the superclass'
* processKeyEvent() method. If the text is already maximum length
* and it is a printing character, ring the bell.
*/
public void processKeyEvent(KeyEvent ke_) {
int key = ke_.getKeyCode();
if (super._document.length() >= _columns &&
ke_.isActionKey() == false &&
key >= ' ') {
ke_.consume();
Toolkit.getDefaultToolkit().beep();
}
super.processKeyEvent(ke_);
}
}