Java tutorial
/* * Copyright (c) 2009-2011 Lockheed Martin Corporation * * 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 org.eurekastreams.web.client.ui.common.stream.renderers; import java.util.Date; import java.util.HashMap; import java.util.Map; import org.eurekastreams.commons.formatting.DateFormatter; import org.eurekastreams.server.domain.stream.ActivityDTO; import org.eurekastreams.server.domain.stream.ActivityVerb; import org.eurekastreams.server.domain.stream.BaseObjectType; import org.eurekastreams.server.domain.stream.StreamEntityDTO; import org.eurekastreams.web.client.model.GroupStickyActivityModel; import org.eurekastreams.web.client.ui.common.dialog.Dialog; import org.eurekastreams.web.client.ui.common.pagedlist.ItemRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.StreamMessageItemRenderer.State; import org.eurekastreams.web.client.ui.common.stream.renderers.object.BookmarkRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.object.FileRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.object.NoteRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.object.ObjectRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.object.VideoRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.verb.PostRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.verb.ShareRenderer; import org.eurekastreams.web.client.ui.common.stream.renderers.verb.VerbRenderer; import org.eurekastreams.web.client.ui.common.stream.share.ShareMessageDialogContent; import org.eurekastreams.web.client.ui.pages.master.StaticResourceBundle; import org.eurekastreams.web.client.utility.BaseActivityLinkBuilder; import org.eurekastreams.web.client.utility.InContextActivityLinkBuilder; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.ui.Anchor; import com.google.gwt.user.client.ui.ComplexPanel; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.InlineHyperlink; import com.google.gwt.user.client.ui.InlineLabel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.Widget; /** * Renders an activity for the sticky display at the top of the list. */ public class StickyActivityRenderer implements ItemRenderer<ActivityDTO> { /** Verb dictionary. */ private final Map<ActivityVerb, VerbRenderer> verbDictionary = new HashMap<ActivityVerb, VerbRenderer>(); /** Object dictionary. */ private final Map<BaseObjectType, ObjectRenderer> objectDictionary = new HashMap<BaseObjectType, ObjectRenderer>(); /** For building links to activities. */ private final BaseActivityLinkBuilder activityLinkBuilder = new InContextActivityLinkBuilder(); /** * Constructor. */ public StickyActivityRenderer() { verbDictionary.put(ActivityVerb.POST, new PostRenderer()); verbDictionary.put(ActivityVerb.SHARE, new ShareRenderer()); objectDictionary.put(BaseObjectType.BOOKMARK, new BookmarkRenderer()); objectDictionary.put(BaseObjectType.NOTE, new NoteRenderer()); objectDictionary.put(BaseObjectType.VIDEO, new VideoRenderer()); objectDictionary.put(BaseObjectType.FILE, new FileRenderer()); } /** * Render a message item. * * @param msg * the message item. * * @return the rendered item as a FlowPanel. */ public Panel render(final ActivityDTO msg) { Panel mainPanel = new FlowPanel(); mainPanel.addStyleName(StaticResourceBundle.INSTANCE.coreCss().streamMessageItem()); mainPanel.addStyleName(StaticResourceBundle.INSTANCE.coreCss().listItem()); mainPanel.addStyleName(State.READONLY.toString()); VerbRenderer verbRenderer = verbDictionary.get(msg.getVerb()); verbRenderer.setup(objectDictionary, msg, State.DEFAULT, false); // left column items Panel leftColumn = null; // avatar Widget avatar = verbRenderer.getAvatar(); if (avatar != null) { Panel parent = leftColumn == null ? mainPanel : leftColumn; parent.add(avatar); } FlowPanel msgContent = new FlowPanel(); msgContent.addStyleName(StaticResourceBundle.INSTANCE.coreCss().description()); mainPanel.add(msgContent); // row for who posted Panel sourceMetaData = new FlowPanel(); sourceMetaData.addStyleName(StaticResourceBundle.INSTANCE.coreCss().messageMetadataSource()); for (StatefulRenderer itemRenderer : verbRenderer.getSourceMetaDataItemRenderers()) { Widget metaDataItem = itemRenderer.render(); if (metaDataItem != null) { sourceMetaData.add(metaDataItem); } } msgContent.add(sourceMetaData); // content FlowPanel nonMetaData = new FlowPanel(); nonMetaData.addStyleName(State.READONLY.toString()); Widget content = verbRenderer.getContent(); if (content != null) { nonMetaData.add(content); msgContent.add(nonMetaData); } // additional metadata FlowPanel metaData = new FlowPanel(); metaData.addStyleName(StaticResourceBundle.INSTANCE.coreCss().messageMetadataAdditional()); for (StatefulRenderer itemRenderer : verbRenderer.getMetaDataItemRenderers()) { Widget metaDataItem = itemRenderer.render(); if (metaDataItem != null) { metaData.add(metaDataItem); } } if (metaData.getWidgetCount() > 0) { msgContent.add(metaData); } msgContent.add(buildActionsLine(msg, verbRenderer)); return mainPanel; } /** * Builds the action links line. * * @param msg * The message. * @param verbRenderer * Renderer for the message's verb. * @return The actions panel. */ private Widget buildActionsLine(final ActivityDTO msg, final VerbRenderer verbRenderer) { StreamEntityDTO destinationStream = msg.getDestinationStream(); // timestamp and actions Panel timestampActions = new FlowPanel(); timestampActions.addStyleName(StaticResourceBundle.INSTANCE.coreCss().messageTimestampActionsArea()); // Hijack this property and use to show lock icon for private activity. if (!msg.isShareable()) { Label lockIcon = new Label(""); lockIcon.addStyleName(StaticResourceBundle.INSTANCE.coreCss().privateIcon()); timestampActions.add(lockIcon); } // create timestamp as permalink String date = new DateFormatter(new Date()).timeAgo(msg.getPostedTime()); Widget dateLink; String permalinkUrl = activityLinkBuilder.buildActivityPermalink(msg.getId(), destinationStream.getType(), destinationStream.getUniqueIdentifier()); dateLink = new InlineHyperlink(date, permalinkUrl); dateLink.addStyleName(StaticResourceBundle.INSTANCE.coreCss().messageTimestampLink()); timestampActions.add(dateLink); if (msg.getAppName() != null) { String appSource = msg.getAppSource(); if (appSource != null) { FlowPanel viaPanel = new FlowPanel(); viaPanel.addStyleName(StaticResourceBundle.INSTANCE.coreCss().viaMetadata()); viaPanel.add(new InlineLabel("via ")); viaPanel.add(new Anchor(msg.getAppName(), appSource)); timestampActions.add(viaPanel); } else { InlineLabel viaLine = new InlineLabel("via " + msg.getAppName()); viaLine.addStyleName(StaticResourceBundle.INSTANCE.coreCss().viaMetadata()); timestampActions.add(viaLine); } // TODO: If appSource is not supplied, the link should go to the respective galleries for apps and plugins. // However, the app galery requires knowing the start page tab id, and the worthwhile plugin gallery is only // available to coordinators. } ComplexPanel actionsPanel = new FlowPanel(); actionsPanel.addStyleName(StaticResourceBundle.INSTANCE.coreCss().messageActionsArea()); // Show comments InlineHyperlink showCommentsLink = new InlineHyperlink("Show Comments", permalinkUrl); actionsPanel.add(showCommentsLink); // Share if (verbRenderer.getAllowShare() && msg.isShareable()) { insertActionSeparator(actionsPanel, null); Label shareLink = new InlineLabel("Share"); shareLink.addStyleName(StaticResourceBundle.INSTANCE.coreCss().linkedLabel()); actionsPanel.add(shareLink); shareLink.addClickHandler(new ClickHandler() { public void onClick(final ClickEvent event) { Dialog.showCentered(new ShareMessageDialogContent(msg)); } }); } // Unstick // Note: using the cheating way: always create the link, let CSS hide it unless the user is actually a // coordinator insertActionSeparator(actionsPanel, StaticResourceBundle.INSTANCE.coreCss().ownerOnlyInline()); Label link = new InlineLabel("Unstick"); link.addStyleName(StaticResourceBundle.INSTANCE.coreCss().linkedLabel()); link.addStyleName(StaticResourceBundle.INSTANCE.coreCss().ownerOnlyInline()); actionsPanel.add(link); link.addClickHandler(new ClickHandler() { public void onClick(final ClickEvent event) { GroupStickyActivityModel.getInstance().delete(msg.getDestinationStream().getDestinationEntityId()); } }); timestampActions.add(actionsPanel); return timestampActions; } /** * Adds a separator (dot). * * @param panel * Panel to put the separator in. * @param extraStyle * Extra style to add. */ private void insertActionSeparator(final ComplexPanel panel, final String extraStyle) { Label sep = new InlineLabel("\u2219"); sep.addStyleName(StaticResourceBundle.INSTANCE.coreCss().actionLinkSeparator()); if (extraStyle != null) { sep.addStyleName(extraStyle); } panel.add(sep); } }