Java tutorial
/** * This file is part of mycollab-web. * * mycollab-web 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-web 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-web. If not, see <http://www.gnu.org/licenses/>. */ package com.mycollab.module.user.ui.components; import com.mycollab.i18n.LocalizationHelper; import com.mycollab.vaadin.UserUIContext; import com.mycollab.vaadin.ui.ELabel; import com.mycollab.vaadin.ui.UIConstants; import com.vaadin.data.Property; import com.vaadin.data.Validator; import com.vaadin.data.util.converter.Converter; import com.vaadin.shared.ui.combobox.FilteringMode; import com.vaadin.ui.*; import org.vaadin.viritin.layouts.MHorizontalLayout; import java.util.Locale; /** * @author MyCollab Ltd. * @since 4.1 */ public class LanguageSelectionField extends CustomField<String> { private static final long serialVersionUID = 1L; private ComboBox languageBox = new ComboBox(); private Label languageCode; public LanguageSelectionField() { languageBox.setNullSelectionAllowed(false); languageBox.setImmediate(true); languageBox.setWidth("200px"); languageBox.setItemCaptionMode(AbstractSelect.ItemCaptionMode.EXPLICIT); languageBox.setFilteringMode(FilteringMode.CONTAINS); languageCode = new ELabel().withStyleName(UIConstants.META_INFO); Locale[] supportedLanguage = LocalizationHelper.getAvailableLocales(); for (Locale locale : supportedLanguage) { String language = locale.toLanguageTag(); languageBox.addItem(language); languageBox.setItemCaption(language, locale.getDisplayName(locale)); } languageBox.addValueChangeListener(valueChangeEvent -> { String value = (String) valueChangeEvent.getProperty().getValue(); languageCode.setValue(value != null ? value : ""); }); } @Override protected Component initContent() { return new MHorizontalLayout(languageBox, languageCode).alignAll(Alignment.MIDDLE_LEFT); } @Override public Class<? extends String> getType() { return String.class; } @Override public void setPropertyDataSource(Property newDataSource) { languageBox.setValue(newDataSource.getValue()); super.setPropertyDataSource(newDataSource); } @Override public void commit() throws SourceException, Validator.InvalidValueException { String value = (String) languageBox.getValue(); setInternalValue(value); super.commit(); } @Override public void setValue(String newFieldValue) throws ReadOnlyException, Converter.ConversionException { languageBox.setValue(newFieldValue); super.setValue(newFieldValue); } @Override public String getValue() { return (String) languageBox.getValue(); } }