Java tutorial
/* 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.klwork.explorer.ui.user; import java.io.InputStream; import java.util.List; import org.activiti.engine.IdentityService; import org.activiti.engine.ProcessEngines; import org.activiti.engine.TaskService; import org.activiti.engine.identity.Picture; import org.activiti.engine.task.Task; import com.klwork.common.utils.StringDateUtil; import com.klwork.explorer.Constants; import com.klwork.explorer.I18nManager; import com.klwork.explorer.Messages; import com.klwork.explorer.ViewManager; import com.klwork.explorer.ViewToolManager; import com.klwork.explorer.ui.Images; import com.klwork.explorer.ui.mainlayout.ExplorerLayout; import com.klwork.explorer.ui.task.TaskEventTextResolver; import com.klwork.explorer.util.time.HumanTime; import com.vaadin.event.Action; import com.vaadin.event.Action.Handler; import com.vaadin.event.ShortcutAction; import com.vaadin.server.StreamResource; import com.vaadin.server.StreamResource.StreamSource; import com.vaadin.shared.ui.MarginInfo; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.Embedded; import com.vaadin.ui.GridLayout; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Panel; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.themes.Reindeer; /** * * @author ww * */ public class UserEventsPanel extends Panel { private static final long serialVersionUID = 1L; protected transient IdentityService identityService; protected transient TaskService taskService; protected I18nManager i18nManager; protected ViewManager viewManager; protected TaskEventTextResolver taskEventTextResolver; protected VerticalLayout pMainContent; protected String processInstanceId; boolean readOnly = false; // protected Task task; protected List<org.activiti.engine.task.Event> taskEvents; protected TextField commentInputField; protected GridLayout eventGrid; public UserEventsPanel() { this(false); } public void initUI() { addStyleName(ExplorerLayout.THEME); pMainContent = new VerticalLayout(); this.setContent(pMainContent); pMainContent.setSpacing(true); //pMainContent.setMargin(true); setHeight(100, Unit.PERCENTAGE); pMainContent.setHeight(100, Unit.PERCENTAGE); addStyleName(ExplorerLayout.STYLE_TASK_EVENT_PANEL); //addTitle(); if (!readOnly) {// ??? addInputField(); } initEventGrid(); addTaskEvents(); } public UserEventsPanel(boolean readOnly) { this.readOnly = readOnly; this.taskService = ProcessEngines.getDefaultProcessEngine().getTaskService(); this.identityService = ProcessEngines.getDefaultProcessEngine().getIdentityService(); this.i18nManager = ViewToolManager.getI18nManager(); this.taskEventTextResolver = new TaskEventTextResolver(); initUI(); } public void refreshTaskEvents() { eventGrid.removeAllComponents(); addTaskEvents(); } /** * Set the task this component is showing the events for. Triggers an update * of the UI. */ public void setTaskId(String taskId) { refreshTaskEvents(); } public void setProcessInstanceId(String processInstanceId) { this.processInstanceId = processInstanceId; // this.task = // taskService.createTaskQuery().taskId(taskId).singleResult(); refreshTaskEvents(); } protected void addTitle() { Label eventTitle = new Label(i18nManager.getMessage(Messages.EVENT_TITLE)); eventTitle.addStyleName(Reindeer.LABEL_H2); pMainContent.addComponent(eventTitle); } protected void initEventGrid() { eventGrid = new GridLayout(); eventGrid.setColumns(2); eventGrid.setSpacing(true); eventGrid.setMargin(new MarginInfo(true, false, false, false)); eventGrid.setWidth("100%"); eventGrid.setColumnExpandRatio(1, 1.0f); eventGrid.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_GRID); pMainContent.addComponent(eventGrid); pMainContent.setExpandRatio(eventGrid, 1.0f); } protected void addTaskEvents() { // WW_TODO taskEvents = taskService.getAllEvents(0, 10); for (final org.activiti.engine.task.Event event : taskEvents) { addTaskEventPicture(event, eventGrid); addTaskEventText(event, eventGrid); } } protected void addTaskEventPicture(final org.activiti.engine.task.Event taskEvent, GridLayout eventGrid) { if (taskEvent.getUserId() == null) { return; } final Picture userPicture = identityService.getUserPicture(taskEvent.getUserId()); Embedded authorPicture = null; if (userPicture != null) { StreamResource imageresource = new StreamResource(new StreamSource() { private static final long serialVersionUID = 1L; public InputStream getStream() { return userPicture.getInputStream(); } }, "event_" + taskEvent.getUserId() + "." + Constants.MIMETYPE_EXTENSION_MAPPING.get(userPicture.getMimeType())); authorPicture = new Embedded(null, imageresource); } else { authorPicture = new Embedded(null, Images.USER_50); } authorPicture.setType(Embedded.TYPE_IMAGE); authorPicture.setHeight("48px"); authorPicture.setWidth("48px"); authorPicture.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_PICTURE); eventGrid.addComponent(authorPicture); } protected void addTaskEventText(final org.activiti.engine.task.Event taskEvent, final GridLayout eventGrid) { VerticalLayout layout = new VerticalLayout(); layout.addStyleName(ExplorerLayout.STYLE_TASK_EVENT); layout.setWidth("100%"); eventGrid.addComponent(layout); // Actual text Label text = taskEventTextResolver.resolveText(taskEvent); text.setWidth("100%"); layout.addComponent(text); // Time String humFormat = new HumanTime(i18nManager).format(taskEvent.getTime()); Label time = new Label(humFormat + " (" + StringDateUtil.dateToString(taskEvent.getTime(), 4) + ")"); time.setSizeUndefined(); time.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_TIME); layout.addComponent(time); } protected void addInputField() { } }