Java tutorial
/* * Copyright 2012 Nicolas Frankel * * 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. */ package com.morevaadin.eventbus.ui; import com.google.common.eventbus.EventBus; import com.morevaadin.eventbus.data.Country; import com.morevaadin.eventbus.ui.event.CountryChangedEvent; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.data.util.BeanItemContainer; import com.vaadin.ui.ComboBox; import com.vaadin.ui.CustomComponent; @SuppressWarnings("serial") public class FirstComponent extends CustomComponent { private ComboBox cb = new ComboBox("Country"); public FirstComponent(final EventBus bus) { BeanItemContainer<Country> container = new BeanItemContainer<Country>(Country.class); for (Country country : Country.values()) { container.addBean(country); } cb.setContainerDataSource(container); cb.setItemCaptionPropertyId("label"); cb.setImmediate(true); setCompositionRoot(cb); cb.addListener(new ValueChangeListener() { @Override public void valueChange(ValueChangeEvent vcEvent) { CountryChangedEvent event = new CountryChangedEvent((Country) vcEvent.getProperty().getValue()); bus.post(event); } }); } }