/*

 * Copyright (c) 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

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 */

package sun.awt;

import java.awt.*;

/**

 * An interface for the EventQueue delegate.

 * This class is added to support JavaFX/AWT interop single threaded mode

 * The delegate should be set in EventQueue by {@link EventQueue#setFwDispatcher(FwDispatcher)}

 * If the delegate is not null, than it handles supported methods instead of the

 * event queue. If it is null than the behaviour of an event queue does not change.

 *

 * @see EventQueue

 *

 * @author Petr Pchelko

 *

 * @since 1.8

 */

public interface FwDispatcher {

    /**

     * Delegates the {@link EventQueue#isDispatchThread()} method

     */

    boolean isDispatchThread();

    /**

     * Forwards a runnable to the delegate, which executes it on an appropriate thread.

     * @param r - a runnable calling {@link EventQueue#dispatchEventImpl(java.awt.AWTEvent, Object)}

     */

    void scheduleDispatch(Runnable r);

    /**

     * Delegates the {@link java.awt.EventQueue#createSecondaryLoop()} method

     */

    SecondaryLoop createSecondaryLoop();

}