widgets/src/main/java/org/apache/hupa/widgets/ui/NumberOnlyTextBox.java

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 * 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                 *
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 * 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.                                           *
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package org.apache.hupa.widgets.ui;

import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.user.client.ui.TextBox;

/**
 * TextBox which only allows numbers to get entered
 *
 *
 */
public class NumberOnlyTextBox extends TextBox implements KeyPressHandler{

    public NumberOnlyTextBox() {
        addKeyPressHandler(this);
    }

    /*
     * (non-Javadoc)
     * @see com.google.gwt.event.dom.client.KeyPressHandler#onKeyPress(com.google.gwt.event.dom.client.KeyPressEvent)
     */
    public void onKeyPress(KeyPressEvent event) {
        char keyCode = event.getCharCode();
        if (!Character.isDigit(keyCode)) {
            cancelKey();
        }
    }

}