| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.deskclock.actionbarmenu; |
| |
| import android.app.Activity; |
| import android.util.ArrayMap; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| |
| import com.android.deskclock.R; |
| |
| /** |
| * Activity scoped singleton that manages action bar menus. Each menu item is controlled by a |
| * {@link MenuItemController} instance. |
| * <p/> |
| * This class needs to be instantiated before or during activity's onCreate event. |
| */ |
| public final class ActionBarMenuManager { |
| // A map of all menu item controllers, keyed by menu item id. |
| private final ArrayMap<Integer, MenuItemController> mControllers; |
| |
| public ActionBarMenuManager(Activity activity) { |
| mControllers = new ArrayMap<>(); |
| } |
| |
| /** |
| * Add one or more {@link MenuItemController} to the actionbar menu. |
| * <p/> |
| * This should be called before activity's onPrepareOptionsMenu event. |
| */ |
| public ActionBarMenuManager addMenuItemController(MenuItemController... menuItemControllers) { |
| if (menuItemControllers != null) { |
| for (MenuItemController controller : menuItemControllers) { |
| mControllers.put(controller.getId(), controller); |
| } |
| } |
| return this; |
| } |
| |
| /** |
| * Inflates {@link Menu} for the activity. |
| * <p/> |
| * This method should be called during activity's onCreateOptionsMenu method. |
| */ |
| public void createOptionsMenu(Menu menu, MenuInflater inflater) { |
| if (menu.size() > 0) { |
| throw new IllegalStateException("Menu has already been inflated."); |
| } |
| inflater.inflate(R.menu.desk_clock_menu, menu); |
| |
| final int controllerSize = mControllers.size(); |
| for (int i = 0; i < controllerSize; i++) { |
| final MenuItemController controller = mControllers.valueAt(i); |
| if (controller.isEnabled()) { |
| controller.setInitialState(menu); |
| } |
| } |
| } |
| |
| /** |
| * Prepares the popup to displays all required menu items. |
| * <p/> |
| * This method should be called during activity's onPrepareOptionsMenu method. |
| */ |
| public void prepareShowMenu(Menu menu) { |
| final int menuSize = menu.size(); |
| for (int i = 0; i < menuSize; i++) { |
| menu.getItem(i).setVisible(false); |
| } |
| final int controllerSize = mControllers.size(); |
| for (int i = 0; i < controllerSize; i++) { |
| final MenuItemController controller = mControllers.valueAt(i); |
| if (controller.isEnabled()) { |
| controller.showMenuItem(menu); |
| } |
| } |
| } |
| |
| /** |
| * Handles click action for a menu item. |
| * <p/> |
| * This method should be called during activity's onOptionsItemSelected method. |
| */ |
| public boolean handleMenuItemClick(MenuItem item) { |
| final int itemId = item.getItemId(); |
| return mControllers.get(itemId).handleMenuItemClick(item); |
| } |
| } |