| /* |
| * 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.sample.dynatablerf.client.widgets; |
| |
| import com.google.gwt.core.client.GWT; |
| import com.google.gwt.editor.client.IsEditor; |
| import com.google.gwt.editor.client.adapters.OptionalFieldEditor; |
| import com.google.gwt.event.dom.client.ClickEvent; |
| import com.google.gwt.sample.dynatablerf.shared.DynaTableRequestFactory; |
| import com.google.gwt.sample.dynatablerf.shared.PersonProxy; |
| import com.google.gwt.uibinder.client.UiBinder; |
| import com.google.gwt.uibinder.client.UiField; |
| import com.google.gwt.uibinder.client.UiHandler; |
| import com.google.gwt.user.client.ui.Button; |
| import com.google.gwt.user.client.ui.Composite; |
| import com.google.gwt.user.client.ui.Widget; |
| import com.google.web.bindery.requestfactory.shared.Receiver; |
| |
| /** |
| * This demonstrates how an editor can be constructed to handle optional fields. |
| * The Person domain object's mentor property is initially <code>null</code>. |
| * This type delegates editing control to an instance of the |
| * {@link OptionalValueEditor} adapter class. |
| */ |
| public class MentorSelector extends Composite implements |
| IsEditor<OptionalFieldEditor<PersonProxy, NameLabel>> { |
| |
| interface Binder extends UiBinder<Widget, MentorSelector> { |
| } |
| |
| @UiField |
| Button choose; |
| |
| @UiField |
| Button clear; |
| |
| @UiField |
| NameLabel nameLabel; |
| |
| private final OptionalFieldEditor<PersonProxy, NameLabel> editor; |
| private final DynaTableRequestFactory factory; |
| |
| public MentorSelector(DynaTableRequestFactory factory) { |
| this.factory = factory; |
| initWidget(GWT.<Binder> create(Binder.class).createAndBindUi(this)); |
| editor = OptionalFieldEditor.of(nameLabel); |
| } |
| |
| public OptionalFieldEditor<PersonProxy, NameLabel> asEditor() { |
| return editor; |
| } |
| |
| public void setEnabled(boolean enabled) { |
| choose.setEnabled(enabled); |
| clear.setEnabled(enabled); |
| } |
| |
| @Override |
| protected void onUnload() { |
| nameLabel.cancelSubscription(); |
| } |
| |
| @UiHandler("choose") |
| void onChoose(ClickEvent event) { |
| setEnabled(false); |
| factory.schoolCalendarRequest().getRandomPerson().to( |
| new Receiver<PersonProxy>() { |
| @Override |
| public void onSuccess(PersonProxy response) { |
| setValue(response); |
| setEnabled(true); |
| } |
| }).fire(); |
| } |
| |
| @UiHandler("clear") |
| void onClear(ClickEvent event) { |
| setValue(null); |
| } |
| |
| /** |
| * This method is not called by the Editor framework. |
| */ |
| private void setValue(PersonProxy person) { |
| editor.setValue(person); |
| nameLabel.setVisible(person != null); |
| } |
| } |