| /******************************************************************************* |
| * Copyright (c) 2014, 2020 Roman Flueckiger. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Roman Flueckiger <roman.flueckiger@mac.com> - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.nebula.widgets.nattable.ui.menu; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.nebula.widgets.nattable.ui.NatEventData; |
| |
| /** |
| * A helper class for managing {@link IMenuItemState}s in the |
| * {@link PopupMenuBuilder}. |
| */ |
| public class MenuItemStateMap { |
| |
| /** |
| * All currently registered states. |
| */ |
| protected Map<String, List<IMenuItemState>> states; |
| |
| /** |
| * Checks if all the registered states for the given id are active. |
| * |
| * @param id |
| * the id identifying the menu item to be checked for activeness. |
| * @param natEventData |
| * NatTable location information where the popup menu was |
| * requested. |
| * @return <code>true</code> if ALL states registered for the given id are |
| * active OR no states exist. Otherwise <code>false</code>. |
| */ |
| protected boolean isActive(String id, NatEventData natEventData) { |
| if (this.states != null) { |
| List<IMenuItemState> menuItemStates = this.states.get(id); |
| if (menuItemStates != null) { |
| for (IMenuItemState state : menuItemStates) { |
| if (!state.isActive(natEventData)) { |
| return false; |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Add an additional state for the given id. |
| * |
| * @param id |
| * the id identifying the menu item to be associated with the |
| * given state. |
| * @param state |
| * the state that will be called to check for activeness. |
| */ |
| public void addMenuItemState(String id, IMenuItemState state) { |
| if (this.states == null) { |
| this.states = new HashMap<>(); |
| } |
| |
| List<IMenuItemState> menuItemStates = this.states.computeIfAbsent(id, i -> new ArrayList<>()); |
| |
| menuItemStates.add(state); |
| } |
| |
| } |