Java tutorial
/* * Copyright 2017 Nikita Petunin, Yuriy Artamonov * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui; import com.google.gwt.dom.client.Document; import com.google.gwt.dom.client.Element; import com.google.gwt.dom.client.PreElement; import com.google.gwt.user.client.ui.Widget; import com.vaadin.client.ComponentConnector; import com.vaadin.client.Util; import com.vaadin.client.ui.AbstractConnector; import com.vaadin.client.ui.Icon; import com.vaadin.shared.ui.ContentMode; import com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.interfaces.DDLayoutState; import com.haulmont.cuba.web.widgets.client.addons.dragdroplayouts.ui.interfaces.DragAndDropAwareState; public class VDragCaptionProvider { private final AbstractConnector root; public VDragCaptionProvider(AbstractConnector root) { this.root = root; } public Element getDragCaptionElement(Widget w) { ComponentConnector component = Util.findConnectorFor(w); DDLayoutState state = ((DragAndDropAwareState) root.getState()).getDragAndDropState(); DragCaptionInfo dci = state.dragCaptions.get(component); Document document = Document.get(); Element dragCaptionImage = document.createDivElement(); Element dragCaption = document.createSpanElement(); String dragCaptionText = dci.caption; if (dragCaptionText != null) { if (dci.contentMode == ContentMode.TEXT) { dragCaption.setInnerText(dragCaptionText); } else if (dci.contentMode == ContentMode.HTML) { dragCaption.setInnerHTML(dragCaptionText); } else if (dci.contentMode == ContentMode.PREFORMATTED) { PreElement preElement = document.createPreElement(); preElement.setInnerText(dragCaptionText); dragCaption.appendChild(preElement); } } String dragIconKey = state.dragCaptions.get(component).iconKey; if (dragIconKey != null) { String resourceUrl = root.getResourceUrl(dragIconKey); Icon icon = component.getConnection().getIcon(resourceUrl); dragCaptionImage.appendChild(icon.getElement()); } dragCaptionImage.appendChild(dragCaption); return dragCaptionImage; } }