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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2010, 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 com.sun.javafx.menu;

import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.collections.ObservableList;
import javafx.event.Event;
import javafx.event.EventHandler;


public interface MenuBase extends MenuItemBase {

//    /**
//     * Called when the menu will be shown.
//     * 
//     */
//    public static EventType ON_SHOWING =
//            EventTypeUtil.registerInternalEventType(Event.ANY, "ON_SHOWING");
//
//    /**
//     * Called when the menu is shown.
//     * 
//     */
//    public static EventType ON_SHOWN =
//            EventTypeUtil.registerInternalEventType(Event.ANY, "ON_SHOWN");
//
//    /**
//     * Called when the menu will be hidden.
//     * 
//     */
//    public static EventType ON_HIDING =
//            EventTypeUtil.registerInternalEventType(Event.ANY, "ON_HIDING");
//
//    /**
//     * Called when the menu is hidden.
//     * 
//     */
//    public static EventType ON_HIDDEN =
//            EventTypeUtil.registerInternalEventType(Event.ANY, "ON_HIDDEN");



     /***************************************************************************
     *                                                                         *
     * Properties                                                              *
     *                                                                         *
     **************************************************************************/

    /*
     * Indicates whether the menu is currently visible.
     */
    public boolean isShowing();
    public ReadOnlyBooleanProperty showingProperty();

    // --- On Showing
    public ObjectProperty> onShowingProperty();
    /**
     * Called just prior to the menu being shown, even if the menu has
     * no items to show. Note however that this won't be called if the menu does
     * not have a valid anchor node.
     */
    public void setOnShowing(EventHandler value);
    public EventHandler getOnShowing();

    // -- On Shown
    public ObjectProperty> onShownProperty();
    /**
     * Called just after the menu is shown.
     */
    public void setOnShown(EventHandler value);
    public EventHandler getOnShown();


    // --- On Hiding
    public ObjectProperty> onHidingProperty();
    /**
     * Called just prior to the menu being hidden.
     */
    public void setOnHiding(EventHandler value);
    public EventHandler getOnHiding();


    // --- On Hidden
    public ObjectProperty> onHiddenProperty();
    /**
     * Called just after the menu has been hidden.
     */
    public void setOnHidden(EventHandler value);
    public EventHandler getOnHidden();


    /***************************************************************************
     *                                                                         *
     * Public API                                                              *
     *                                                                         *
     **************************************************************************/

    public ObservableList getItemsBase();

    /**
     * If the menu is not disabled and is not already showing,
     * then this will cause the menu to be shown.
     */
    public void show();

    /**
     * Hides the menu if it was previously showing, and any showing
     * submenus. If this menu is not showing, then invoking this function
     * has no effect.
     */
    public void hide();

}