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/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.events;
import java.util.function.*;
import org.eclipse.swt.internal.*;
/**
* Classes which implement this interface provide methods
* that deal with the hiding and showing of menus.
* <p>
* After creating an instance of a class that implements
* this interface it can be added to a menu using the
* <code>addMenuListener</code> method and removed using
* the <code>removeMenuListener</code> method. When the
* menu is hidden or shown, the appropriate method will
* be invoked.
* </p>
*
* @see MenuAdapter
* @see MenuEvent
*/
public interface MenuListener extends SWTEventListener {
/**
* Sent when a menu is hidden.
*
* @param e an event containing information about the menu operation
*/
void menuHidden(MenuEvent e);
/**
* Sent when a menu is shown.
*
* @param e an event containing information about the menu operation
*/
void menuShown(MenuEvent e);
/**
* Static helper method to create a <code>MenuListener</code> for the
* {@link #menuHidden(MenuEvent e)}) method, given a lambda expression or a method reference.
*
* @param c the consumer of the event
* @return MenuListener
* @since 3.107
*/
static MenuListener menuHiddenAdapter(Consumer<MenuEvent> c) {
return new MenuAdapter() {
@Override
public void menuHidden(MenuEvent e) {
c.accept(e);
}
};
}
/**
* Static helper method to create a <code>MenuListener</code> for the
* {@link #menuShown(MenuEvent e)}) method, given a lambda expression or a method reference.
*
* @param c the consumer of the event
* @return MenuListener
* @since 3.107
*/
static MenuListener menuShownAdapter(Consumer<MenuEvent> c) {
return new MenuAdapter() {
@Override
public void menuShown(MenuEvent e) {
c.accept(e);
}
};
}
}
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