72 lines
2.8 KiB
Java
72 lines
2.8 KiB
Java
/*
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* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.awt;
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import java.awt.AWTEvent;
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import java.awt.EventQueue;
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public class EventQueueDelegate {
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private static final Object EVENT_QUEUE_DELEGATE_KEY =
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new StringBuilder("EventQueueDelegate.Delegate");
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public static void setDelegate(Delegate delegate) {
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AppContext.getAppContext().put(EVENT_QUEUE_DELEGATE_KEY, delegate);
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}
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public static Delegate getDelegate() {
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return
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(Delegate) AppContext.getAppContext().get(EVENT_QUEUE_DELEGATE_KEY);
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}
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public interface Delegate {
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/**
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* This method allows for changing {@code EventQueue} events order.
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*
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* @param eventQueue current {@code EventQueue}
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* @return next {@code event} for the {@code EventDispatchThread}
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*/
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public AWTEvent getNextEvent(EventQueue eventQueue) throws InterruptedException;
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/**
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* Notifies delegate before EventQueue.dispatch method.
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*
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* Note: this method may mutate the event
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*
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* @param event to be dispatched by {@code dispatch} method
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* @return handle to be passed to {@code afterDispatch} method
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*/
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public Object beforeDispatch(AWTEvent event) throws InterruptedException;
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/**
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* Notifies delegate after EventQueue.dispatch method.
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*
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* @param event {@code event} dispatched by the {@code dispatch} method
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* @param handle object which came from {@code beforeDispatch} method
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*/
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public void afterDispatch(AWTEvent event, Object handle) throws InterruptedException;
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}
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}
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