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 org.activiti.engine.ProcessEngines; import org.activiti.engine.TaskService; import org.activiti.engine.task.Task; import com.klwork.explorer.data.LazyLoadingContainer; import com.klwork.explorer.data.LazyLoadingQuery; import com.klwork.explorer.navigation.UriFragment; import com.klwork.explorer.ui.Images; import com.klwork.explorer.ui.base.AbstractTablePage; import com.klwork.explorer.ui.custom.TaskListHeader; import com.klwork.explorer.ui.custom.ToolBar; import com.klwork.explorer.ui.mainlayout.DashBoardLayout; import com.klwork.explorer.ui.mainlayout.ExplorerLayout; import com.klwork.explorer.ui.util.ThemeImageColumnGenerator; import com.vaadin.data.Item; import com.vaadin.data.Property; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.server.Resource; import com.vaadin.ui.Alignment; import com.vaadin.ui.Component; import com.vaadin.ui.Embedded; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Table; import com.vaadin.ui.Table.ColumnHeaderMode; /** * Abstract super class for all task pages (inbox, queued, archived, etc.), * Builds up the default UI: task list on the left, central panel and events on * the right. * * @author Joram Barrez */ public abstract class AbstractTaskPage extends AbstractTablePage { private static final long serialVersionUID = 1L; protected transient TaskService taskService; protected String taskId; protected Table taskTable; protected LazyLoadingContainer taskListContainer; protected LazyLoadingQuery lazyLoadingQuery; protected TaskEventsPanel taskEventPanel; public AbstractTaskPage() { taskService = ProcessEngines.getDefaultProcessEngine().getTaskService(); } public AbstractTaskPage(String taskId) { this(); this.taskId = taskId; } @Override public HorizontalLayout createSelectHead() { HorizontalLayout tableHeadLayout = new HorizontalLayout(); // tableHeadLayout.setSizeFull(); tableHeadLayout.setSpacing(true); tableHeadLayout.setMargin(true); Resource pictureResource = Images.TASK_LIST; Embedded picture = new Embedded(null, pictureResource); picture.addStyleName(ExplorerLayout.STYLE_TASK_EVENT_PICTURE); picture.setType(Embedded.TYPE_IMAGE); tableHeadLayout.addComponent(picture); tableHeadLayout.setComponentAlignment(picture, Alignment.MIDDLE_LEFT); Label nameLabel = null; nameLabel = new Label(""); nameLabel.addStyleName("taskListLabel"); // nameLabel.addStyleName(ExplorerLayout.STYLE_LABEL_BOLD); tableHeadLayout.addComponent(nameLabel); tableHeadLayout.setComponentAlignment(nameLabel, Alignment.MIDDLE_LEFT); return tableHeadLayout; } @Override protected void initUi() { super.initUi(); if (taskId == null) { // WW_TODO selectElement(0); } else { // int index = taskListContainer.getIndexForObjectId(taskId); selectElement(index); } if (taskListContainer.size() == 0) { // ExplorerApp.get().setCurrentUriFragment(getUriFragment(null)); } } @Override protected Table createList() { // WW_TODO taskpage createList,? taskTable = new Table(); taskTable.addStyleName(DashBoardLayout.TABLE_BOARD); /* * taskTable.addStyleName(ExplorerLayout.STYLE_TASK_LIST); * taskTable.addStyleName(ExplorerLayout.STYLE_SCROLLABLE); */ // Listener to change right panel when clicked on a task taskTable.addValueChangeListener(getListSelectionListener()); this.lazyLoadingQuery = createLazyLoadingQuery(); // System.out.println(lazyLoadingQuery.size()); this.taskListContainer = new LazyLoadingContainer(lazyLoadingQuery, 10); taskTable.setContainerDataSource(taskListContainer); // Create column header /* * taskTable.addGeneratedColumn("icon", new * ThemeImageColumnGenerator(Images.TASK_22)); * taskTable.setColumnWidth("icon", 22); */ taskTable.addContainerProperty("name", String.class, ""); taskTable.setColumnHeaderMode(Table.ColumnHeaderMode.HIDDEN); return taskTable; } protected ValueChangeListener getListSelectionListener() { return new Property.ValueChangeListener() { private static final long serialVersionUID = 1L; public void valueChange(ValueChangeEvent event) { Item item = taskTable.getItem(event.getProperty().getValue()); // the // value // of // the // property // is // the // itemId // of // the // table // entry if (item != null) { String id = (String) item.getItemProperty("id").getValue(); // WW_TODO table, setDetailComponent(createDetailComponent(id)); // taskEventPanel.setTaskId(task.getId()); // WW_TODO UriFragment?? // UriFragment taskFragment = getUriFragment(id); // ExplorerApp.get().setCurrentUriFragment(taskFragment); } else { // Nothing is selected setDetailComponent(null); // ExplorerApp.get().setCurrentUriFragment(getUriFragment(null)); } } }; } protected Component createDetailComponent(String id) { Task task = taskService.createTaskQuery().taskId(id).singleResult(); Component detailComponent = new TaskDetailPanel(task, AbstractTaskPage.this); // WW_TODO ?? // taskEventPanel.setTaskId(task.getId()); return detailComponent; } @Override protected Component getEventComponent() { return getTaskEventPanel(); } public TaskEventsPanel getTaskEventPanel() { if (taskEventPanel == null) { taskEventPanel = new TaskEventsPanel(); } return taskEventPanel; } @Override public Component getSearchComponent() { return new TaskListHeader(); } protected abstract LazyLoadingQuery createLazyLoadingQuery(); protected UriFragment getUriFragment(String taskId) { // TODO Auto-generated method stub return null; } public void refreshTableContent() { logger.debug("task table?..."); refreshSelectNext(); } // protected abstract UriFragment getUriFragment(String taskId); }