com.mycollab.vaadin.web.ui.field.DateFormatField.java Source code

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Here is the source code for com.mycollab.vaadin.web.ui.field.DateFormatField.java

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/**
 * This file is part of mycollab-ui.
 *
 * mycollab-ui 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.
 *
 * mycollab-ui 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 mycollab-ui.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.mycollab.vaadin.web.ui.field;

import com.mycollab.vaadin.ui.NotificationUtil;
import com.vaadin.data.Validator;
import com.vaadin.event.FieldEvents;
import com.vaadin.ui.*;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.vaadin.viritin.layouts.MHorizontalLayout;

/**
 * @author MyCollab Ltd
 * @since 5.3.1
 */
public class DateFormatField extends CustomField<String> {
    private String dateFormat;
    private TextField dateInput;
    private Label dateExample;
    private DateTime now;
    private DateTimeFormatter dateFormatInstance;

    public DateFormatField(final String initialFormat) {
        this.dateFormat = initialFormat;
        dateInput = new TextField(null, initialFormat);
        dateInput.setImmediate(true);
        dateInput.setTextChangeEventMode(AbstractTextField.TextChangeEventMode.EAGER);
        now = new DateTime();
        dateExample = new Label();
        dateFormatInstance = DateTimeFormat.forPattern(dateFormat);
        dateExample.setValue("(" + dateFormatInstance.print(now) + ")");
        dateExample.setWidthUndefined();
        dateInput.addTextChangeListener(new FieldEvents.TextChangeListener() {
            @Override
            public void textChange(FieldEvents.TextChangeEvent event) {
                try {
                    String newFormat = event.getText();
                    dateFormatInstance = DateTimeFormat.forPattern(newFormat);
                    dateExample.setValue("(" + dateFormatInstance.print(now) + ")");
                } catch (Exception e) {
                    NotificationUtil.showErrorNotification("Invalid format");
                    dateInput.setValue(initialFormat);
                    dateFormatInstance = DateTimeFormat.forPattern(initialFormat);
                    dateExample.setValue("(" + dateFormatInstance.print(now) + ")");
                }
            }
        });
    }

    @Override
    public String getValue() {
        return dateInput.getValue();
    }

    @Override
    public void commit() throws SourceException, Validator.InvalidValueException {
        setInternalValue(dateInput.getValue());
        super.commit();
    }

    @Override
    protected Component initContent() {
        return new MHorizontalLayout(dateInput, dateExample);
    }

    @Override
    public Class<? extends String> getType() {
        return String.class;
    }
}