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.vaadin.events; import java.util.ArrayList; import java.util.List; import org.opennms.features.vaadin.api.OnmsBeanContainer; import org.opennms.netmgt.xml.eventconf.Varbindsdecode; import org.vaadin.dialogs.ConfirmDialog; import com.vaadin.data.Container; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Component; import com.vaadin.ui.CustomField; import com.vaadin.ui.DefaultFieldFactory; import com.vaadin.ui.Field; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Notification; import com.vaadin.ui.Table; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; /** * The Event's VarbindsDecode Field. * * @author <a href="mailto:agalue@opennms.org">Alejandro Galue</a> */ @SuppressWarnings("serial") public class VarbindsDecodeField extends CustomField<List<Varbindsdecode>> implements Button.ClickListener { /** The Container. */ private final OnmsBeanContainer<Varbindsdecode> container = new OnmsBeanContainer<Varbindsdecode>( Varbindsdecode.class); /** The Table. */ private final Table table = new Table(null, container); /** The Toolbar. */ private final HorizontalLayout toolbar = new HorizontalLayout(); /** The add button. */ private final Button add = new Button("Add", this); /** The delete button. */ private final Button delete = new Button("Delete", this); /** * Instantiates a new varbinds decode field. * * @param caption the caption */ public VarbindsDecodeField(String caption) { setCaption(caption); table.addStyleName("light"); table.setVisibleColumns(new Object[] { "parmid", "decodeCollection" }); table.setColumnHeader("parmid", "Parameter ID"); table.setColumnHeader("decodeCollection", "Decode Values"); table.setColumnExpandRatio("decodeCollection", 1); table.setEditable(!isReadOnly()); table.setSelectable(true); table.setHeight("125px"); table.setWidth("100%"); table.setTableFieldFactory(new DefaultFieldFactory() { @Override public Field<?> createField(Container container, Object itemId, Object propertyId, Component uiContext) { if (propertyId.equals("decodeCollection")) { final TextField field = new TextField(); field.setConverter(new DecodeListConverter()); return field; } return super.createField(container, itemId, propertyId, uiContext); } }); toolbar.addComponent(add); toolbar.addComponent(delete); toolbar.setVisible(table.isEditable()); } /* (non-Javadoc) * @see com.vaadin.ui.CustomField#initContent() */ @Override public Component initContent() { VerticalLayout layout = new VerticalLayout(); layout.addComponent(table); layout.addComponent(toolbar); layout.setComponentAlignment(toolbar, Alignment.MIDDLE_RIGHT); return layout; } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#getType() */ @Override @SuppressWarnings("unchecked") public Class<? extends List<Varbindsdecode>> getType() { return (Class<? extends List<Varbindsdecode>>) new ArrayList<Varbindsdecode>().getClass(); } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#getInternalValue() */ @Override protected List<Varbindsdecode> getInternalValue() { return container.getOnmsBeans(); } /* (non-Javadoc) * @see com.vaadin.ui.AbstractField#setInternalValue(java.lang.Object) */ @Override protected void setInternalValue(List<Varbindsdecode> varbindsDecodes) { container.removeAllItems(); container.addAll(varbindsDecodes); } /* (non-Javadoc) * @see com.vaadin.ui.AbstractComponent#setReadOnly(boolean) */ @Override public void setReadOnly(boolean readOnly) { table.setEditable(!readOnly); toolbar.setVisible(!readOnly); super.setReadOnly(readOnly); } /* (non-Javadoc) * @see com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui.Button.ClickEvent) */ @Override public void buttonClick(Button.ClickEvent event) { final Button btn = event.getButton(); if (btn == add) { addHandler(); } if (btn == delete) { deleteHandler(); } } /** * Adds the handler. */ private void addHandler() { Varbindsdecode v = new Varbindsdecode(); v.setParmid("??"); container.addOnmsBean(v); } /** * Delete handler. */ private void deleteHandler() { final Object itemId = table.getValue(); if (itemId == null) { Notification.show("Please select a Varbind Decode from the table."); } else { ConfirmDialog.show(getUI(), "Are you sure?", "Do you really want to remove the selected Varbinds Decode field?\nThis action cannot be undone.", "Yes", "No", new ConfirmDialog.Listener() { public void onClose(ConfirmDialog dialog) { if (dialog.isConfirmed()) { table.removeItem(itemId); } } }); } } }