Java tutorial
/* * Copyright 2010 Instituto Superior Tecnico * * https://fenix-ashes.ist.utl.pt/ * * This file is part of the vaadin-framework. * * The vaadin-framework Infrastructure is free software: you can * redistribute it and/or modify it under the terms of the GNU Lesser General * Public License as published by the Free Software Foundation, either version * 3 of the License, or (at your option) any later version.* * * vaadin-framework 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with vaadin-framework. If not, see <http://www.gnu.org/licenses/>. * */ package pt.ist.vaadinframework.ui.fields; import java.util.HashMap; import java.util.Map; import pt.utl.ist.fenix.tools.util.i18n.Language; import pt.utl.ist.fenix.tools.util.i18n.MultiLanguageString; import com.vaadin.data.Property; import com.vaadin.data.Validator.InvalidValueException; import com.vaadin.data.util.PropertyFormatter; import com.vaadin.terminal.ThemeResource; import com.vaadin.ui.Alignment; import com.vaadin.ui.CustomField; import com.vaadin.ui.Embedded; import com.vaadin.ui.Field; import com.vaadin.ui.GridLayout; import com.vaadin.ui.Label; import com.vaadin.ui.TextField; /** * @author Pedro Santos (pedro.miguel.santos@ist.utl.pt) * */ @SuppressWarnings("serial") public class MultiLanguageStringField extends CustomField { private final Language[] languages; private final Map<Language, TextField> fields = new HashMap<Language, TextField>(); public MultiLanguageStringField(String bundlename, Language... languages) { this.languages = languages; GridLayout languagesLayout = new GridLayout(3, languages.length); languagesLayout.setSpacing(true); for (int i = 0; i < languages.length; ++i) { fields.put(languages[i], new TextField()); languagesLayout.addComponent(fields.get(languages[i]), 0, i); Embedded languageIcon = new Embedded(null, new ThemeResource("../icons/flags/" + languages[i].toString() + ".gif")); languagesLayout.addComponent(languageIcon, 1, i); languagesLayout.setComponentAlignment(languageIcon, Alignment.MIDDLE_RIGHT); Label languageLabel = new Label(languages[i].toString()); languagesLayout.addComponent(languageLabel, 2, i); languagesLayout.setComponentAlignment(languageLabel, Alignment.MIDDLE_LEFT); } setCompositionRoot(languagesLayout); } @Override public void setPropertyDataSource(final Property newDataSource) { super.setPropertyDataSource(newDataSource); for (final Language language : languages) { fields.get(language).setPropertyDataSource(new PropertyFormatter(newDataSource) { @Override public Object parse(String formattedValue) throws Exception { MultiLanguageString current = (MultiLanguageString) newDataSource.getValue(); if (current == null) { current = new MultiLanguageString(); } return current.with(language, formattedValue); } @Override public String format(Object value) { String content = ((MultiLanguageString) value).getContent(language); if (content == null) { return ""; } return content; } }); } } @Override public void setWriteThrough(boolean writeThrough) throws SourceException, InvalidValueException { for (TextField childField : fields.values()) { childField.setWriteThrough(writeThrough); } super.setWriteThrough(writeThrough); } @Override public void setEnabled(boolean enabled) { for (TextField childField : fields.values()) { childField.setEnabled(enabled); } super.setEnabled(enabled); } @Override public void setReadOnly(boolean readOnly) { for (TextField childField : fields.values()) { childField.setReadOnly(readOnly); } super.setReadOnly(readOnly); } @Override public void setVisible(boolean visible) { for (TextField childField : fields.values()) { childField.setVisible(visible); } super.setVisible(visible); } @Override public void setImmediate(boolean immediate) { for (TextField childField : fields.values()) { childField.setImmediate(immediate); } super.setImmediate(immediate); } @Override public void setReadThrough(boolean readThrough) throws SourceException { for (TextField childField : fields.values()) { childField.setReadThrough(readThrough); } super.setReadThrough(readThrough); } @Override protected boolean isEmpty() { for (TextField childField : fields.values()) { if (((String) childField.getValue()).length() > 0) { return true; } } return false; } public TextField getTextField(Language language) { return fields.get(language); } @Override public void commit() throws SourceException, InvalidValueException { for (Field field : fields.values()) { field.commit(); } super.commit(); } @Override public Class<?> getType() { return MultiLanguageString.class; } }