IntegerTextField.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 ro.nextreports.designer.ui;

import java.awt.event.KeyEvent;
import javax.swing.JTextField;

/**
 * @author Decebal Suiu
 */
public class IntegerTextField extends JTextField {

    final static String badchars = "`~!@#$%^&*()_+=\\|\"':;?/>.<, ";

    public void processKeyEvent(KeyEvent ev) {
        char c = ev.getKeyChar();

        if ((Character.isLetter(c) && !ev.isAltDown())
                || badchars.indexOf(c) > -1) {
            ev.consume();
            return;
        }
        if (c == '-' && getDocument().getLength() > 0) {
            ev.consume();
        } else {
            super.processKeyEvent(ev);
        }
    }

}