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.topology.api.support; import com.vaadin.shared.ui.label.ContentMode; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Layout; import com.vaadin.ui.UI; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.Window; import com.vaadin.ui.Button.ClickListener; public class DialogWindow extends Window implements ClickListener { private static final long serialVersionUID = -2235453349601991807L; final Button okayButton = new Button("OK", this); final UI parentWindow; public DialogWindow(final UI parentWindow, final String title, final String description) { this.parentWindow = parentWindow; setCaption(title); setImmediate(true); setResizable(false); setModal(true); setWidth(400, Unit.PIXELS); setContent(createContent(description)); parentWindow.addWindow(this); } private Layout createMainArea(final String description) { HorizontalLayout layout = new HorizontalLayout(); layout.setSpacing(true); layout.setMargin(true); layout.setWidth(100, Unit.PERCENTAGE); Label label = new Label(description, ContentMode.PREFORMATTED); label.setWidth(100, Unit.PERCENTAGE); layout.addComponent(label); return layout; } private Layout createContent(final String description) { VerticalLayout content = new VerticalLayout(); content.setWidth(100, Unit.PERCENTAGE); Layout footer = createFooter(); Layout mainArea = createMainArea(description); content.addComponent(mainArea); content.addComponent(footer); content.setExpandRatio(mainArea, 1); return content; } private Layout createFooter() { HorizontalLayout footer = new HorizontalLayout(); footer.setSpacing(true); footer.setMargin(true); footer.setWidth(100, Unit.PERCENTAGE); footer.addComponent(okayButton); footer.setComponentAlignment(okayButton, Alignment.BOTTOM_RIGHT); return footer; } @Override public void buttonClick(Button.ClickEvent event) { if (event.getButton() == okayButton) parentWindow.removeWindow(DialogWindow.this); } }