| /******************************************************************************* |
| * Copyright (c) 2007, 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.ui.commands; |
| |
| import java.util.Map; |
| |
| import org.eclipse.ui.menus.UIElement; |
| |
| /** |
| * An IHandler for a command that expects to provide feedback through the |
| * registered element mechanism must implement this interface. |
| * |
| * @since 3.3 |
| * |
| */ |
| public interface IElementUpdater { |
| /** |
| * Whenever the elements for a command are refreshed, this method is called on |
| * the active handler for that command. |
| * <p> |
| * <b>Note:</b> Handlers must never cache the element, which can disappear or be |
| * replaced at any time. Everybody should go through the ICommandService |
| * refreshElements(*) method. |
| * </p> |
| * |
| * @param element An element for a specific UI element. Will not be |
| * <code>null</code>. |
| * @param parameters Any parameters registered with the callback. Will not be |
| * <code>null</code>, but it may be empty. |
| */ |
| void updateElement(UIElement element, Map parameters); |
| } |
