/* 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.activiti.explorer.ui.task;
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.explorer.Constants;
import org.activiti.explorer.ExplorerApp;
import org.activiti.explorer.I18nManager;
import org.activiti.explorer.Messages;
import org.activiti.explorer.ViewManager;
import org.activiti.explorer.ui.Images;
import org.activiti.explorer.ui.mainlayout.ExplorerLayout;
import org.activiti.explorer.util.time.HumanTime;
import com.vaadin.event.Action;
import com.vaadin.event.Action.Handler;
import com.vaadin.event.ShortcutAction;
import com.vaadin.terminal.StreamResource;
import com.vaadin.terminal.StreamResource.StreamSource;
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;
/**
* Component containing all events for a given task.
*
* @author Joram Barrez
*/
public class TaskEventsPanel 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 String taskId;
protected List<org.activiti.engine.task.Event> taskEvents;
protected TextField commentInputField;
protected GridLayout eventGrid;
public TaskEventsPanel() {
this.taskService = ProcessEngines.getDefaultProcessEngine().getTaskService();
this.identityService = ProcessEngines.getDefaultProcessEngine().getIdentityService();
this.i18nManager = ExplorerApp.get().getI18nManager();
this.viewManager = ExplorerApp.get().getViewManager();
this.taskEventTextResolver = new TaskEventTextResolver();
((VerticalLayout) getContent()).setSpacing(true);
((VerticalLayout) getContent()).setMargin(true);
setHeight(100, UNITS_PERCENTAGE);
addStyleName(ExplorerLayout.STYLE_TASK_EVENT_PANEL);
addTitle();
addInputField();
initEventGrid();
addTaskEvents();
}
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) {
this.taskId = taskId;
refreshTaskEvents();
}
protected void addTitle() {
Label eventTitle = new Label(i18nManager.getMessage(Messages.EVENT_TITLE));
eventTitle.addStyleName(Reindeer.LABEL_H2);
addComponent(eventTitle);
}
protected void initEventGrid() {
eventGrid = new GridLayout();
eventGrid.setColumns(2);
eventGrid.setSpacing(true);
eventGrid.setMargin(true, false, false, false);
eventGrid.setWidth("100%");
eventGrid.setColumnExpandRatio(1, 1.0f);
eventGrid.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_GRID);
addComponent(eventGrid);
}
protected void addTaskEvents() {
if(taskId != null) {
taskEvents = taskService.getTaskEvents(taskId);
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) {
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()), ExplorerApp.get());
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
Label time = new Label(new HumanTime(i18nManager).format(taskEvent.getTime()));
time.setSizeUndefined();
time.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_TIME);
layout.addComponent(time);
}
protected void addInputField() {
HorizontalLayout layout = new HorizontalLayout();
layout.setSpacing(true);
layout.setWidth(100, UNITS_PERCENTAGE);
addComponent(layout);
Panel textFieldPanel = new Panel(); // Hack: actionHandlers can only be attached to panels or windows
textFieldPanel.addStyleName(Reindeer.PANEL_LIGHT);
textFieldPanel.setContent(new VerticalLayout());
textFieldPanel.setWidth(100, UNITS_PERCENTAGE);
layout.addComponent(textFieldPanel);
layout.setExpandRatio(textFieldPanel, 1.0f);
commentInputField = new TextField();
commentInputField.setWidth(100, UNITS_PERCENTAGE);
textFieldPanel.addComponent(commentInputField);
// Hack to catch keyboard 'enter'
textFieldPanel.addActionHandler(new Handler() {
public void handleAction(Action action, Object sender, Object target) {
addNewComment(commentInputField.getValue().toString());
}
public Action[] getActions(Object target, Object sender) {
return new Action[] {new ShortcutAction("enter", ShortcutAction.KeyCode.ENTER, null)};
}
});
Button addCommentButton = new Button(i18nManager.getMessage(Messages.TASK_ADD_COMMENT));
layout.addComponent(addCommentButton);
layout.setComponentAlignment(addCommentButton, Alignment.MIDDLE_LEFT);
addCommentButton.addListener(new ClickListener() {
public void buttonClick(ClickEvent event) {
addNewComment(commentInputField.getValue().toString());
}
});
}
protected void addNewComment(String text) {
taskService.addComment(taskId, null, text);
refreshTaskEvents();
commentInputField.setValue("");
commentInputField.focus();
}
}