| /* |
| * Copyright 2010 Google Inc. |
| * |
| * 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.google.gwt.examples.cellview; |
| |
| import com.google.gwt.cell.client.FieldUpdater; |
| import com.google.gwt.cell.client.TextInputCell; |
| import com.google.gwt.core.client.EntryPoint; |
| import com.google.gwt.user.cellview.client.CellTable; |
| import com.google.gwt.user.cellview.client.Column; |
| import com.google.gwt.user.client.Window; |
| import com.google.gwt.user.client.ui.RootPanel; |
| import com.google.gwt.view.client.ProvidesKey; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Example of using a {@link FieldUpdater} with a {@link CellTable}. |
| */ |
| public class CellTableFieldUpdaterExample implements EntryPoint { |
| |
| /** |
| * A simple data type that represents a contact with a unique ID. |
| */ |
| private static class Contact { |
| private static int nextId = 0; |
| |
| private final int id; |
| private String name; |
| |
| public Contact(String name) { |
| nextId++; |
| this.id = nextId; |
| this.name = name; |
| } |
| } |
| |
| /** |
| * The list of data to display. |
| */ |
| private static final List<Contact> CONTACTS = Arrays.asList(new Contact("John"), new Contact( |
| "Joe"), new Contact("George")); |
| |
| /** |
| * The key provider that allows us to identify Contacts even if a field |
| * changes. We identify contacts by their unique ID. |
| */ |
| private static final ProvidesKey<Contact> KEY_PROVIDER = |
| new ProvidesKey<CellTableFieldUpdaterExample.Contact>() { |
| @Override |
| public Object getKey(Contact item) { |
| return item.id; |
| } |
| }; |
| |
| @Override |
| public void onModuleLoad() { |
| // Create a CellTable with a key provider. |
| final CellTable<Contact> table = new CellTable<Contact>(KEY_PROVIDER); |
| |
| // Add a text input column to edit the name. |
| final TextInputCell nameCell = new TextInputCell(); |
| Column<Contact, String> nameColumn = new Column<Contact, String>(nameCell) { |
| @Override |
| public String getValue(Contact object) { |
| // Return the name as the value of this column. |
| return object.name; |
| } |
| }; |
| table.addColumn(nameColumn, "Name"); |
| |
| // Add a field updater to be notified when the user enters a new name. |
| nameColumn.setFieldUpdater(new FieldUpdater<Contact, String>() { |
| @Override |
| public void update(int index, Contact object, String value) { |
| // Inform the user of the change. |
| Window.alert("You changed the name of " + object.name + " to " + value); |
| |
| // Push the changes into the Contact. At this point, you could send an |
| // asynchronous request to the server to update the database. |
| object.name = value; |
| |
| // Redraw the table with the new data. |
| table.redraw(); |
| } |
| }); |
| |
| // Push the data into the widget. |
| table.setRowData(CONTACTS); |
| |
| // Add it to the root panel. |
| RootPanel.get().add(table); |
| } |
| } |