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/*
* Copyright (C) 2001-2013 Michael Fuchs
*
* This file is part of herold.
*
* herold is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* herold 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with herold. If not, see <http://www.gnu.org/licenses/>.
*/
package org.dbdoclet.jive.widget;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.PlainDocument;
public class NumberTextField extends AbstractTextField {
private static final long serialVersionUID = 1L;
/**
* Konstruktor mit Angabe der gewünschten Anzahl an Spalten für die Eingabe.
*
* @param cols
*/
public NumberTextField(int cols) {
super(cols);
}
public Integer getNumber() {
String buffer = getText();
if (buffer == null || buffer.trim().length() == 0) {
return null;
}
return Integer.parseInt(buffer);
}
@Override
protected Document createDefaultModel() {
return new NumberDocument();
}
class NumberDocument extends PlainDocument {
private static final long serialVersionUID = 1L;
@Override
public void insertString(int offset, String str, AttributeSet a)
throws BadLocationException {
char[] buffer = str.toCharArray();
boolean valid = true;
boolean fit = true;
if (buffer.length + getLength() <= getMaxLength()) {
for (int i = 0; i < buffer.length; i++) {
if (Character.isDigit(buffer[i]) == false) {
valid = false;
break;
}
}
} else {
fit = false;
}
if (valid && fit) {
super.insertString(offset, str, a);
} else {
getToolkit().beep();
}
}
}
}
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