Java tutorial
/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javafx.concurrent; import javafx.beans.NamedArg; import javafx.event.Event; import javafx.event.EventTarget; import javafx.event.EventType; /** * An event which occurs whenever the state changes on a Worker. Both * {@link Task} and {@link Service} support listening to state events. * @since JavaFX 2.1 */ public class WorkerStateEvent extends Event { /** * Common supertype for all worker state event types. */ public static final EventType<WorkerStateEvent> ANY = new EventType<WorkerStateEvent>(Event.ANY, "WORKER_STATE"); /** * This event occurs when the state of a Worker implementation has * transitioned to the READY state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_READY = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_READY"); /** * This event occurs when the state of a Worker implementation has * transitioned to the SCHEDULED state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_SCHEDULED = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_SCHEDULED"); /** * This event occurs when the state of a Worker implementation has * transitioned to the RUNNING state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_RUNNING = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_RUNNING"); /** * This event occurs when the state of a Worker implementation has * transitioned to the SUCCEEDED state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_SUCCEEDED = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_SUCCEEDED"); /** * This event occurs when the state of a Worker implementation has * transitioned to the CANCELLED state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_CANCELLED = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_CANCELLED"); /** * This event occurs when the state of a Worker implementation has * transitioned to the FAILED state. */ public static final EventType<WorkerStateEvent> WORKER_STATE_FAILED = new EventType<WorkerStateEvent>( WorkerStateEvent.ANY, "WORKER_STATE_FAILED"); /** * Create a new WorkerStateEvent. Specify the worker and the event type. * * @param worker The Worker which is firing the event. The Worker really * should be an EventTarget, otherwise the EventTarget * for the event will be null. * @param eventType The type of event. This should not be null. */ public WorkerStateEvent(@NamedArg("worker") Worker worker, @NamedArg("eventType") EventType<? extends WorkerStateEvent> eventType) { super(worker, worker instanceof EventTarget ? (EventTarget) worker : null, eventType); } /** * The Worker on which the Event initially occurred. * * @return The Worker on which the Event initially occurred. */ @Override public Worker getSource() { return (Worker) super.getSource(); } }