Java tutorial
/** * This file is part of mycollab-web. * * mycollab-web is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * mycollab-web 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with mycollab-web. If not, see <http://www.gnu.org/licenses/>. */ package com.esofthead.mycollab.vaadin.web.ui; import com.vaadin.event.LayoutEvents.LayoutClickEvent; import com.vaadin.event.LayoutEvents.LayoutClickListener; import com.vaadin.server.FontAwesome; import com.vaadin.shared.ui.label.ContentMode; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import org.apache.commons.lang3.StringUtils; /** * @author MyCollab Ltd. * @since 1.0 */ @SuppressWarnings("serial") public class LabelHTMLDisplayWidget extends HorizontalLayout { private static int NUM_CUT = 100; private Label lbDes; private boolean hasShowLess; private String description; public LabelHTMLDisplayWidget(String content) { description = content; if (StringUtils.isBlank(description)) { addComponent(new Label("<<No Description>>")); return; } String contentLabel = trimText(content); lbDes = new Label(description, ContentMode.HTML); if (contentLabel != null && contentLabel.length() > NUM_CUT) { hasShowLess = true; contentLabel += " " + FontAwesome.PLUS_SQUARE.getHtml(); lbDes.setValue(contentLabel); lbDes.addStyleName(UIConstants.LABEL_CLICKABLE); } lbDes.setDescription(description); addComponent(lbDes); addLayoutClickListener(new LayoutClickListener() { @Override public void layoutClick(LayoutClickEvent event) { if (event.getClickedComponent() instanceof Label) { if (description != null && description.length() > NUM_CUT) { if (hasShowLess) { lbDes.setValue(description + " " + FontAwesome.MINUS_SQUARE.getHtml()); } else { lbDes.setValue(trimText(description) + " " + FontAwesome.PLUS_SQUARE.getHtml()); } lbDes.setContentMode(ContentMode.HTML); hasShowLess = !hasShowLess; } } } }); } private static String trimText(String value) { if (value != null && value.length() > NUM_CUT) { return value.substring(0, NUM_CUT) + "..."; } return value; } }