Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2012-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.topology.plugins.widget.internal; import java.util.Arrays; import java.util.List; import org.opennms.features.topology.api.IViewContribution; import org.opennms.features.topology.api.WidgetContext; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.server.Resource; import com.vaadin.ui.Component; import com.vaadin.ui.ListSelect; import com.vaadin.ui.Notification; public class SimpleViewContribution implements IViewContribution { private static final List<String> cities = Arrays .asList(new String[] { "Berlin", "Brussels", "Helsinki", "Madrid", "Oslo", "Paris", "Stockholm" }); @SuppressWarnings("serial") @Override public Component getView(final WidgetContext widgetContext) { ListSelect listSelect = new ListSelect("Select a city", cities); listSelect.setHeight("100%"); listSelect.setWidth("100%"); listSelect.setImmediate(true); listSelect.addValueChangeListener(new ValueChangeListener() { @Override public void valueChange(ValueChangeEvent event) { Notification.show("" + event.getProperty()); } }); return listSelect; } @Override public String getTitle() { return "Simple View"; } @Override public Resource getIcon() { return null; } }