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| 1 | /* | ||
| 2 | * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.awt; | ||
| 27 | |||
| 28 | import java.awt.AWTEvent; | ||
| 29 | import java.awt.EventQueue; | ||
| 30 | |||
| 31 | |||
| 32 | public class EventQueueDelegate { | ||
| 33 | private static final Object EVENT_QUEUE_DELEGATE_KEY = | ||
| 34 | new StringBuilder("EventQueueDelegate.Delegate"); | ||
| 35 | |||
| 36 | public static void setDelegate(Delegate delegate) { | ||
| 37 | AppContext.getAppContext().put(EVENT_QUEUE_DELEGATE_KEY, delegate); | ||
| 38 | } | ||
| 39 | public static Delegate getDelegate() { | ||
| 40 | return | ||
| 41 | (Delegate) AppContext.getAppContext().get(EVENT_QUEUE_DELEGATE_KEY); | ||
| 42 | } | ||
| 43 | public interface Delegate { | ||
| 44 | /** | ||
| 45 | * This method allows for changing {@code EventQueue} events order. | ||
| 46 | * | ||
| 47 | * @param eventQueue current {@code EventQueue} | ||
| 48 | * @return next {@code event} for the {@code EventDispatchThread} | ||
| 49 | */ | ||
| 50 | |||
| 51 | public AWTEvent getNextEvent(EventQueue eventQueue) throws InterruptedException; | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Notifies delegate before EventQueue.dispatch method. | ||
| 55 | * | ||
| 56 | * Note: this method may mutate the event | ||
| 57 | * | ||
| 58 | * @param event to be dispatched by {@code dispatch} method | ||
| 59 | * @return handle to be passed to {@code afterDispatch} method | ||
| 60 | */ | ||
| 61 | public Object beforeDispatch(AWTEvent event) throws InterruptedException; | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Notifies delegate after EventQueue.dispatch method. | ||
| 65 | * | ||
| 66 | * @param event {@code event} dispatched by the {@code dispatch} method | ||
| 67 | * @param handle object which came from {@code beforeDispatch} method | ||
| 68 | */ | ||
| 69 | public void afterDispatch(AWTEvent event, Object handle) throws InterruptedException; | ||
| 70 | } | ||
| 71 | } | ||