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.task; import java.util.List; import org.activiti.engine.ProcessEngines; import org.activiti.engine.TaskService; import org.activiti.engine.task.Attachment; import org.activiti.engine.task.Task; import com.klwork.explorer.I18nManager; import com.klwork.explorer.Messages; import com.klwork.explorer.ViewToolManager; import com.klwork.explorer.ui.Images; import com.klwork.explorer.ui.content.AttachmentDetailPopupWindow; import com.klwork.explorer.ui.content.AttachmentRenderer; import com.klwork.explorer.ui.content.AttachmentRendererManager; import com.klwork.explorer.ui.content.CreateAttachmentPopupWindow; import com.klwork.explorer.ui.content.RelatedContentComponent; import com.klwork.explorer.ui.custom.ConfirmationDialogPopupWindow; import com.klwork.explorer.ui.event.ConfirmationEvent; import com.klwork.explorer.ui.event.ConfirmationEventListener; import com.klwork.explorer.ui.event.SubmitEvent; import com.klwork.explorer.ui.event.SubmitEventListener; import com.klwork.explorer.ui.mainlayout.ExplorerLayout; import com.vaadin.data.Item; import com.vaadin.event.MouseEvents.ClickEvent; import com.vaadin.event.MouseEvents.ClickListener; import com.vaadin.server.Sizeable.Unit; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Component; import com.vaadin.ui.ComponentContainer; import com.vaadin.ui.Embedded; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Table; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.Table.ColumnHeaderMode; import com.vaadin.ui.themes.Reindeer; /** * Component for showing related content of a task. Also allows adding, removing * and opening related content. * * @author Frederik Heremans * @author Joram Barrez */ public class TaskRelatedContentComponent extends VerticalLayout implements RelatedContentComponent { private static final long serialVersionUID = 1L; protected transient TaskService taskService; protected I18nManager i18nManager; protected AttachmentRendererManager attachmentRendererManager; protected Task task; protected VerticalLayout contentLayout; protected Table table; protected TaskDetailPanel taskDetailPanel; protected Label noContentLabel; public TaskRelatedContentComponent(Task task, TaskDetailPanel taskDetailPanel) { this.taskService = ProcessEngines.getDefaultProcessEngine().getTaskService(); this.i18nManager = ViewToolManager.getI18nManager(); this.attachmentRendererManager = ViewToolManager.getAttachmentRendererManager(); this.task = task; this.taskDetailPanel = taskDetailPanel; addStyleName(ExplorerLayout.STYLE_DETAIL_BLOCK); initActions(); initAttachmentTable(); } public void showAttachmentDetail(Attachment attachment) { // Show popup window with detail of attachment rendered in in AttachmentDetailPopupWindow popup = new AttachmentDetailPopupWindow(attachment); ViewToolManager.showPopupWindow(popup); } protected void initActions() { // WW_TODO ? HorizontalLayout actionsContainer = new HorizontalLayout(); actionsContainer.setSizeFull(); // Title Label processTitle = new Label(i18nManager.getMessage(Messages.TASK_RELATED_CONTENT)); processTitle.addStyleName(ExplorerLayout.STYLE_H3); processTitle.setSizeFull(); actionsContainer.addComponent(processTitle); actionsContainer.setComponentAlignment(processTitle, Alignment.MIDDLE_LEFT); actionsContainer.setExpandRatio(processTitle, 1.0f); // Add content button Button addRelatedContentButton = new Button(); addRelatedContentButton.addStyleName(ExplorerLayout.STYLE_ADD); addRelatedContentButton.addClickListener(new com.vaadin.ui.Button.ClickListener() { private static final long serialVersionUID = 1L; public void buttonClick(com.vaadin.ui.Button.ClickEvent event) { CreateAttachmentPopupWindow popup = new CreateAttachmentPopupWindow(); if (task.getProcessInstanceId() != null) { popup.setProcessInstanceId(task.getProcessInstanceId()); } else { popup.setTaskId(task.getId()); } // Add listener to update attachments when added popup.addListener(new SubmitEventListener() { private static final long serialVersionUID = 1L; @Override protected void submitted(SubmitEvent event) { taskDetailPanel.notifyRelatedContentChanged(); } @Override protected void cancelled(SubmitEvent event) { // No attachment was added so updating UI isn't // needed. } }); ViewToolManager.showPopupWindow(popup); } }); actionsContainer.addComponent(addRelatedContentButton); actionsContainer.setComponentAlignment(processTitle, Alignment.MIDDLE_RIGHT); addComponent(actionsContainer); } protected void initAttachmentTable() { contentLayout = new VerticalLayout(); addComponent(contentLayout); table = new Table(); table.setWidth(100, Unit.PERCENTAGE); table.addStyleName(ExplorerLayout.STYLE_RELATED_CONTENT_LIST); // Invisible by default, only shown when attachments are present table.setVisible(false); table.setColumnHeaderMode(Table.ColumnHeaderMode.HIDDEN); addContainerProperties(); // Get the related content for this task //WW_TODO refreshTaskAttachments(); contentLayout.addComponent(table); } protected void addContainerProperties() { table.addContainerProperty("type", Embedded.class, null); table.setColumnWidth("type", 16); table.addContainerProperty("name", Component.class, null); table.addContainerProperty("delete", Embedded.class, null); table.setColumnWidth("delete", 16); } public void refreshTaskAttachments() { table.removeAllItems(); if (noContentLabel != null) { contentLayout.removeComponent(noContentLabel); } List<Attachment> attachments = null; if (task.getProcessInstanceId() != null) {//?id? attachments = (taskService.getProcessInstanceAttachments(task.getProcessInstanceId())); } else { attachments = taskService.getTaskAttachments(task.getId()); } if (attachments.size() > 0) { addAttachmentsToTable(attachments); } else { table.setVisible(false); noContentLabel = new Label(i18nManager.getMessage(Messages.TASK_NO_RELATED_CONTENT)); noContentLabel.addStyleName(Reindeer.LABEL_SMALL); contentLayout.addComponent(noContentLabel); } } @SuppressWarnings("unchecked") protected void addAttachmentsToTable(List<Attachment> attachments) { for (Attachment attachment : attachments) { AttachmentRenderer renderer = attachmentRendererManager.getRenderer(attachment); Item attachmentItem = table.addItem(attachment.getId()); attachmentItem.getItemProperty("name").setValue(renderer.getOverviewComponent(attachment, this)); attachmentItem.getItemProperty("type").setValue(new Embedded(null, renderer.getImage(attachment))); Embedded deleteButton = new Embedded(null, Images.DELETE); deleteButton.addStyleName(ExplorerLayout.STYLE_CLICKABLE); deleteButton.addClickListener((ClickListener) new DeleteClickedListener(attachment)); attachmentItem.getItemProperty("delete").setValue(deleteButton); } if (table.getItemIds().size() > 0) { table.setVisible(true); } table.setPageLength(table.size()); } protected void addEmptySpace(ComponentContainer container) { Label emptySpace = new Label(" ", Label.CONTENT_XHTML); emptySpace.setSizeUndefined(); container.addComponent(emptySpace); } private class DeleteClickedListener extends ConfirmationEventListener implements ClickListener { private static final long serialVersionUID = 1L; private Attachment attachment; public DeleteClickedListener(Attachment attachment) { this.attachment = attachment; } public void click(ClickEvent event) { ConfirmationDialogPopupWindow confirm = new ConfirmationDialogPopupWindow( i18nManager.getMessage(Messages.RELATED_CONTENT_CONFIRM_DELETE, attachment.getName())); confirm.addListener((ConfirmationEventListener) this); confirm.showConfirmation(); } @Override protected void confirmed(ConfirmationEvent event) { taskService.deleteAttachment(attachment.getId()); taskDetailPanel.notifyRelatedContentChanged(); } @Override protected void rejected(ConfirmationEvent event) { // Nothing to do here } } }