Java tutorial
/* * BPM Technology Accelerators Development Team, BPM Technology * Accelerators Community and individual contributors as indicated * by the @authors tag. See the copyright.txt in the distribution * for a full listing of individual contributors. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.accelerators.activiti.admin.ui; import java.util.HashSet; import java.util.Set; import com.vaadin.data.Item; import com.vaadin.event.Action; import com.vaadin.event.ItemClickEvent; import com.vaadin.event.ItemClickEvent.ItemClickListener; import com.vaadin.ui.Table; import com.vaadin.ui.Window; import com.vaadin.ui.Window.CloseEvent; import com.vaadin.ui.Window.CloseListener; import org.accelerators.activiti.admin.AdminApp; import org.accelerators.activiti.admin.ui.i18n.Messages; /** * Group table * * @author Patrick Oberg * */ public class GroupTable extends Table implements CloseListener, ItemClickListener { private static final long serialVersionUID = 1L; static final Object[] columnHeaders = new Object[] { "id", "name", "type" }; private final Action ACTION_EDIT; private final Action ACTION_DELETE; private final Action[] ACTIONS_UNMARKED; private final Action[] ACTIONS_MARKED; private final AdminApp app; private GroupEditForm form; private Window popupWindow; private HashSet<Object> markedRows = new HashSet<Object>(); /** * Creates the group table */ @SuppressWarnings("serial") public GroupTable(AdminApp application) { // Set application reference this.app = application; // Maximize the table width and height setSizeFull(); setPageLength(size()); // Allow selecting items from the table. setSelectable(true); // Remove border // addStyleName(Reindeer.TABLE_BORDERLESS); // Send changes in selection immediately to server. setImmediate(true); // Disable null selection setNullSelectionAllowed(false); // Allow column to collapse setColumnCollapsingAllowed(true); // Allow reordering of columns setColumnReorderingAllowed(true); // Add table data source setContainerDataSource(app.getAdminService().getGroups()); // Set column headers setColumnHeader("id", "Id"); setColumnHeader("name", "Name"); setColumnHeader("type", "Type"); // Set column headers alignment setColumnAlignment("id", ALIGN_LEFT); setColumnAlignment("name", ALIGN_LEFT); setColumnAlignment("type", ALIGN_LEFT); // Define the names and data types of columns. setVisibleColumns(columnHeaders); // Add item click listener for double-click on table row addListener((ItemClickListener) this); // Context menu actions must be set here to use i18n support ACTION_EDIT = new Action(app.getMessage(Messages.Edit)); ACTION_DELETE = new Action(app.getMessage(Messages.Delete)); ACTIONS_UNMARKED = new Action[] { ACTION_EDIT, ACTION_DELETE }; ACTIONS_MARKED = new Action[] { ACTION_EDIT, ACTION_DELETE }; // Actions (a.k.a context menu) addActionHandler(new Action.Handler() { public Action[] getActions(Object target, Object sender) { if (markedRows.contains(target)) { return ACTIONS_MARKED; } else { return ACTIONS_UNMARKED; } } public void handleAction(Action action, Object sender, Object target) { if (ACTION_EDIT.equals(action)) { editGroup(target); } else if (ACTION_DELETE.equals(action)) { deleteGroup(target); } } }); } /** * Edit the group * * @param itemId * the BeanItem id of the group */ private void editGroup(Object itemId) { Item item = getItem(itemId); // Create form if (form == null) { form = new GroupEditForm(app); } if (item != form.getItemDataSource()) { // Set double-clicked item form.setItemDataSource(item); /* Create a new popup window. */ popupWindow = new Window(); popupWindow.center(); popupWindow.setModal(true); popupWindow.setWidth("400px"); popupWindow.addStyleName(Consts.POPUP); // Set caption popupWindow.setCaption(app.getMessage(Messages.EditGroup)); // Add form popupWindow.addComponent(form); // Listen for close events for the window. popupWindow.addListener(this); } // Add the window inside the main window. app.getMainWindow().addWindow(popupWindow); } /** * Delete the group * * @param target * the BeanItem id of the group */ private void deleteGroup(final Object target) { // Get user id final String id = getItem(target).getItemProperty("id").toString(); // Get unassigned tasks for the group to be deleted Set<String> unassignedTasks = app.getAdminService().getUnassignedTaskIdsByGroup(id); // Create pre-formatted confirm dialog message about out deleting the // user String message = ""; if (!unassignedTasks.isEmpty()) { // One or more tasks will be affected if deleting the group message = app.getMessage(Messages.DeleteGroupAffectsTasks) + "<ul><li>" + app.getMessage(Messages.UnassignedTasks) + unassignedTasks + "</li></ul><br/>"; } else { // Info when no task is affected message = app.getMessage(Messages.DeleteGroupAffectsNoTasks) + "<br/><br/>"; } ConfirmDialog dialog = new ConfirmDialog(app.getMessage(Messages.ConfirmDelete) + id, message, app.getMessage(Messages.OkKey), app.getMessage(Messages.CancelKey), new ConfirmDialog.ConfirmationDialogCallback() { @Override public void response(boolean ok) { // Delete user confirmed? if (ok) { // Delete user app.getAdminService().deleteGroup(id); // Remove user from container app.getAdminService().getGroups().removeItem(target); // Show confirmation app.getMainWindow().showNotification(app.getMessage(Messages.DeletedGroup) + id); } } }); // add dialog style dialog.addStyleName(Consts.POPUP); // Open popup window app.getMainWindow().addWindow(dialog); } /** * Refresh the groups from the data source */ public void refresh() { // Refresh groups app.getAdminService().refreshGroups(); // Add table data source setContainerDataSource(app.getAdminService().getGroups()); // Define the names and data types of columns. setVisibleColumns(columnHeaders); } @Override public void itemClick(ItemClickEvent event) { if (event.isDoubleClick()) { // Open form for editing the group editGroup(event.getItemId()); } } @Override public void windowClose(CloseEvent e) { // TODO Auto-generated method stub } }