| /* |
| * Copyright 2011 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.mobilewebapp.client.event; |
| |
| import com.google.web.bindery.event.shared.Event; |
| import com.google.web.bindery.event.shared.EventBus; |
| import com.google.web.bindery.event.shared.HandlerRegistration; |
| |
| |
| /** |
| * Fired when the user wants the app to do something. Action events are fired |
| * with a string name, and handlers monitor the event bus for them based on that |
| * name. |
| */ |
| public class ActionEvent extends Event<ActionEvent.Handler> { |
| |
| /** |
| * Implemented by objects that handle {@link ActionEvent}. |
| */ |
| public interface Handler { |
| void onAction(ActionEvent event); |
| } |
| |
| /** |
| * The event type. |
| */ |
| private static final Type<ActionEvent.Handler> TYPE = new Type<ActionEvent.Handler>(); |
| |
| public static void fire(EventBus eventBus, String sourceName) { |
| eventBus.fireEventFromSource(new ActionEvent(), sourceName); |
| } |
| |
| public static HandlerRegistration register(EventBus eventBus, String sourceName, Handler handler) { |
| return eventBus.addHandlerToSource(TYPE, sourceName, handler); |
| } |
| |
| /** |
| * Protected contructor to encourage the use of |
| * {@link #fire(EventBus, String)}. |
| */ |
| protected ActionEvent() { |
| } |
| |
| @Override |
| public final Type<ActionEvent.Handler> getAssociatedType() { |
| return TYPE; |
| } |
| |
| @Override |
| protected void dispatch(ActionEvent.Handler handler) { |
| handler.onAction(this); |
| } |
| } |