/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.action;

import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;

/**
 * Interface for something that creates and disposes of SWT menus.  Note that
 * it is the responsibility of the implementor to dispose of SWT menus it
 * creates.
 */
public interface IMenuCreator {
	/**
	 * Disposes the menu returned by <code>getMenu</code>. Does nothing
	 * if there is no menu.  This method will be executed only when the
	 * parent of the menu is disposed.
	 */
	public void dispose();

	/**
	 * Returns the SWT menu, created as a pop up menu parented by the
	 * given control.  In most cases, this menu can be created once, cached and reused
	 * when the pop-up/drop-down action occurs.  If the menu must be dynamically
	 * created (i.e., each time it is popped up or dropped down), the old menu
	 * should be disposed of before replacing it with the new menu.
	 *
	 * @param parent the parent control
	 * @return the menu, or <code>null</code> if the menu could not
	 *  be created
	 */
	public Menu getMenu(Control parent);

	/**
	 * Returns an SWT menu created as a drop down menu parented by the
	 * given menu.  In most cases, this menu can be created once, cached and reused
	 * when the pop-up/drop-down action occurs.  If the menu must be dynamically
	 * created (i.e., each time it is popped up or dropped down), the old menu
	 * should be disposed of before replacing it with the new menu.
	 *
	 * @param parent the parent menu
	 * @return the menu, or <code>null</code> if the menu could not
	 *  be created
	 */
	public Menu getMenu(Menu parent);
}
