com.mcparland.john.vaadin_mvn_arch.samples.crud.NumberField.java Source code

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Here is the source code for com.mcparland.john.vaadin_mvn_arch.samples.crud.NumberField.java

Source

package com.mcparland.john.vaadin_mvn_arch.samples.crud;

/*
 * #%L
 * vaadin_mvn_arch-ui
 * %%
 * Copyright (C) 2014 John McParland
 * %%
 * Licensed 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.
 * #L%
 */

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;

import com.mcparland.john.vaadin_mvn_arch.samples.AttributeExtension;

import com.vaadin.data.util.converter.StringToIntegerConverter;
import com.vaadin.ui.TextField;

/**
 * A field for entering numbers. On touch devices, a numeric keyboard is shown
 * instead of the normal one.
 */
public class NumberField extends TextField {
    /**
     * The serialVersionUID.
     */
    private static final long serialVersionUID = 1L;

    public NumberField() {
        // Mark the field as numeric.
        // This affects the virtual keyboard shown on mobile devices.
        AttributeExtension ae = new AttributeExtension();
        ae.extend(this);
        ae.setAttribute("type", "number");

        setConverter(new StringToIntegerConverter() {
            /**
             * The serialVersionUID.
             */
            private static final long serialVersionUID = 1L;

            @Override
            protected NumberFormat getFormat(Locale locale) {
                // do not use a thousands separator, as HTML5 input type
                // number expects a fixed wire/DOM number format regardless
                // of how the browser presents it to the user (which could
                // depend on the browser locale)
                DecimalFormat format = new DecimalFormat();
                format.setMaximumFractionDigits(0);
                format.setDecimalSeparatorAlwaysShown(false);
                format.setParseIntegerOnly(true);
                format.setGroupingUsed(false);
                return format;
            }
        });
    }

    public NumberField(String caption) {
        this();
        setCaption(caption);
    }
}