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.Set; import com.vaadin.data.Item; import com.vaadin.data.Validator.InvalidValueException; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.AbstractSelect.Filtering; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.ComboBox; import com.vaadin.ui.Component; import com.vaadin.ui.DefaultFieldFactory; import com.vaadin.ui.Field; import com.vaadin.ui.Form; import com.vaadin.ui.GridLayout; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.TextField; import com.vaadin.ui.TwinColSelect; import org.accelerators.activiti.admin.AdminApp; import org.accelerators.activiti.admin.ui.i18n.Messages; /** * Form for creating groups * * @author Patrick Oberg * */ @SuppressWarnings("unchecked") public class GroupCreateForm extends Form implements ClickListener { private static final long serialVersionUID = 1L; private static final String[] visibleItems = new String[] { "id", "name", "type", "users" }; private final Button create; private final Button close; private final Button reset; private final ComboBox groupTypes;; private final String[] types; private final AdminApp app; private TwinColSelect members; /** * * @param app */ public GroupCreateForm(AdminApp application) { // Set application reference this.app = application; // Enable buffering so that commit() must be called for the form. setWriteThrough(false); // Set the form to act immediately on user input. setImmediate(true); // Set form size setSizeFull(); // Setup footer layout HorizontalLayout footer = new HorizontalLayout(); footer.setSpacing(true); footer.setWidth("100%"); footer.setVisible(true); // Add footer setFooter(footer); // Init buttons create = new Button(app.getMessage(Messages.Create), (ClickListener) this); close = new Button(app.getMessage(Messages.Close), (ClickListener) this); reset = new Button(app.getMessage(Messages.Reset), this, "discard"); // Set button grid GridLayout grid = new GridLayout(3, 1); grid.addComponent(create, 0, 0); grid.addComponent(reset, 1, 0); grid.addComponent(close, 2, 0); grid.setSpacing(true); // Add grid to footer footer.addComponent(grid); // Right align buttons in footer footer.setComponentAlignment(grid, Alignment.BOTTOM_RIGHT); // Init group types types = new String[] { app.getMessage(Messages.Assignment), app.getMessage(Messages.Program), app.getMessage(Messages.Project), app.getMessage(Messages.Role), app.getMessage(Messages.Team), app.getMessage(Messages.Unit) }; // Create combo box for group types groupTypes = new ComboBox("type"); groupTypes.setFilteringMode(Filtering.FILTERINGMODE_STARTSWITH); for (int i = 0; i < types.length; i++) { groupTypes.addItem(types[i]); } // Propagate changes directly groupTypes.setImmediate(true); // Allow adding new group types groupTypes.setNewItemsAllowed(true); // Get available users members = new TwinColSelect(app.getMessage(Messages.Members), app.getAdminService().getUsers()); // Set column headers members.setLeftColumnCaption(app.getMessage(Messages.AvailableUsers)); members.setRightColumnCaption(app.getMessage(Messages.GroupMembers)); // Propagate changes directly members.setImmediate(true); // Set max width members.setWidth("100%"); // Field factory for over riding how fields are created setFormFieldFactory(new DefaultFieldFactory() { private static final long serialVersionUID = 1L; @Override public Field createField(Item item, Object propertyId, Component uiContext) { if (propertyId.equals("type")) { groupTypes.setWidth("100%"); groupTypes.setRequired(false); groupTypes.setCaption(app.getMessage(Messages.Types)); return groupTypes; } Field field = super.createField(item, propertyId, uiContext); if (propertyId.equals("id")) { TextField tf = (TextField) field; // Do not display "null" to the user when the field is empty tf.setNullRepresentation(""); // Set as required field tf.setRequired(true); // Set error message tf.setRequiredError("Id is missing"); // Set read only tf.setReadOnly(false); } else if (propertyId.equals("name")) { TextField tf = (TextField) field; // Do not display "null" to the user when the field is empty tf.setNullRepresentation(""); // Set as required field tf.setRequired(true); // Set error message tf.setRequiredError(app.getMessage(Messages.GroupNameIsMissing)); } field.setWidth("100%"); return field; } }); } @Override public void setItemDataSource(Item item) { if (item != null) { // Set data source super.setItemDataSource(item); // Ensure that the fields are shown in correct order setVisibleItemProperties(visibleItems); // Attach non-bean fields attachField("members", members); // No members selected per default members.setValue(null); // Set focus on field getField("id").focus(); } else { super.setItemDataSource(null); } } @Override public void buttonClick(ClickEvent event) { // Get source event Button source = event.getButton(); if (source == create) { /* If the given input is not valid there is no point in continuing */ if (!isValid()) { return; } // Commit the form commit(); try { // Create group app.getAdminService().saveGroup(getItemDataSource(), (Set<String>) members.getValue()); // Show notification app.getMainWindow().showNotification(app.getMessage(Messages.GroupCreatedMessage) + getItemDataSource().getItemProperty("id").toString()); // Clear data source setItemDataSource(null); // Clear groups members.setValue(null); // Close window app.getMainWindow().removeWindow(getWindow()); } catch (InvalidValueException e) { // Failed to commit. The validation errors are // automatically shown to the user. } } else if (source == close) { // Clear data source setItemDataSource(null); // Clear groups members.setValue(null); // Close window app.getMainWindow().removeWindow(getWindow()); } } }