Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2013-2014 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.surveillanceviews.ui; import com.vaadin.data.validator.AbstractStringValidator; import com.vaadin.event.ShortcutAction; import com.vaadin.server.Sizeable; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.FormLayout; 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; import com.vaadin.ui.Window; import org.opennms.features.vaadin.surveillanceviews.model.Category; import org.opennms.features.vaadin.surveillanceviews.model.ColumnDef; import org.opennms.features.vaadin.surveillanceviews.model.Def; import org.opennms.features.vaadin.surveillanceviews.model.RowDef; import org.opennms.features.vaadin.surveillanceviews.service.SurveillanceViewService; import org.opennms.netmgt.model.OnmsCategory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Collection; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; /** * This class represents the category chooser window for column/row definitions. * * @author Christian Pape */ public class SurveillanceViewConfigurationCategoryWindow extends Window { /** * the logger instance */ private static final Logger LOG = LoggerFactory.getLogger(SurveillanceViewConfigurationCategoryWindow.class); /** * The constructor for instantiating this component. * * @param surveillanceViewService the surveillance view service to be used. * @param defs the column/row defs * @param def the def to be edited * @param saveActionListener the listener for the saving action */ public SurveillanceViewConfigurationCategoryWindow(final SurveillanceViewService surveillanceViewService, final Collection<?> defs, final Def def, final SaveActionListener saveActionListener) { /** * calling the super constructor */ super("Window title"); /** * Check whether this dialog is for a column or row and alter the window title */ if (def instanceof RowDef) { super.setCaption("Row definition"); } else { super.setCaption("Column definition"); } /** * Setting the modal and size properties */ setModal(true); setClosable(false); setResizable(false); setWidth(30, Sizeable.Unit.PERCENTAGE); setHeight(400, Unit.PIXELS); /** * Title and refresh seconds */ final TextField labelField = new TextField(); labelField.setValue(def.getLabel()); labelField.setImmediate(true); labelField.setCaption("Label"); labelField.setDescription("Label of this category"); labelField.setWidth(100, Unit.PERCENTAGE); /** * Creating a simple validator for the title field */ labelField.addValidator( new AbstractStringValidator("Please use an unique name for this column/row definition") { @Override protected boolean isValidValue(String s) { if ("".equals(s.trim())) { return false; } /** * check if the name clashes with other defs */ for (Def defx : (Collection<Def>) defs) { if (defx.getLabel().equals(s)) { if (defx != def) { return false; } } } return true; } }); /** * Categories table */ final Table categoriesTable = new Table(); categoriesTable.setSizeFull(); categoriesTable.setHeight(250.0f, Unit.PIXELS); categoriesTable.setCaption("Categories"); categoriesTable.setSortEnabled(true); categoriesTable.addContainerProperty("name", String.class, ""); categoriesTable.setColumnHeader("name", "Category"); categoriesTable.setColumnExpandRatio("Category", 1.0f); categoriesTable.setSelectable(true); categoriesTable.setMultiSelect(true); final List<OnmsCategory> categories = surveillanceViewService.getOnmsCategories(); final Map<Integer, OnmsCategory> categoriesMap = new HashMap<>(); for (OnmsCategory onmsCategory : categories) { categoriesTable.addItem(new Object[] { onmsCategory.getName() }, onmsCategory.getId()); categoriesMap.put(onmsCategory.getId(), onmsCategory); if (def.containsCategory(onmsCategory.getName())) { categoriesTable.select(onmsCategory.getId()); } } /** * Create form layouts... */ FormLayout baseFormLayout = new FormLayout(); baseFormLayout.setSizeFull(); baseFormLayout.setMargin(true); baseFormLayout.addComponent(labelField); baseFormLayout.addComponent(categoriesTable); /** * Creating the vertical layout... */ VerticalLayout verticalLayout = new VerticalLayout(); verticalLayout.setSizeFull(); verticalLayout.addComponent(baseFormLayout); verticalLayout.setExpandRatio(baseFormLayout, 1.0f); /** * Using an additional {@link com.vaadin.ui.HorizontalLayout} for layouting the buttons */ HorizontalLayout horizontalLayout = new HorizontalLayout(); horizontalLayout.setMargin(true); horizontalLayout.setSpacing(true); horizontalLayout.setWidth(100, Unit.PERCENTAGE); /** * Adding the cancel button... */ Button cancel = new Button("Cancel"); cancel.setDescription("Cancel editing properties"); cancel.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { close(); } }); cancel.setClickShortcut(ShortcutAction.KeyCode.ESCAPE, null); horizontalLayout.addComponent(cancel); horizontalLayout.setExpandRatio(cancel, 1); horizontalLayout.setComponentAlignment(cancel, Alignment.TOP_RIGHT); /** * ...and the OK button */ Button ok = new Button("Save"); ok.setDescription("Save properties and close"); ok.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { Def finalDef = null; if (def instanceof RowDef) { finalDef = new RowDef(); } if (def instanceof ColumnDef) { finalDef = new ColumnDef(); } Set<Object> categories = (Set<Object>) categoriesTable.getValue(); if (!labelField.isValid()) { ((SurveillanceViewsConfigUI) getUI()).notifyMessage("Error", "Please use an unique label for this category", Notification.Type.ERROR_MESSAGE); return; } if (categories.isEmpty()) { ((SurveillanceViewsConfigUI) getUI()).notifyMessage("Error", "You must choose at least one surveillance category", Notification.Type.ERROR_MESSAGE); return; } for (Object object : categories) { Category category = new Category(); category.setName(categoriesMap.get(object).getName()); finalDef.getCategories().add(category); } finalDef.setLabel(labelField.getValue()); saveActionListener.save(finalDef); close(); } }); ok.setClickShortcut(ShortcutAction.KeyCode.ENTER, null); horizontalLayout.addComponent(ok); verticalLayout.addComponent(horizontalLayout); setContent(verticalLayout); } /** * Interface for a listner that will be invoked when OK is clicked */ public static interface SaveActionListener { void save(Def def); } }