1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.deskclock.actionbarmenu 18 19 import android.app.Activity 20 import android.view.Menu 21 import android.view.MenuItem 22 23 /** 24 * Activity scoped singleton that manages action bar menus. Each menu item is controlled by a 25 * [MenuItemController] instance. 26 */ 27 class OptionsMenuManager { 28 29 private val mControllers: MutableList<MenuItemController?> = ArrayList() 30 31 /** 32 * Add one or more [MenuItemController] to the actionbar menu. 33 * 34 * This should be called in [Activity.onCreate]. 35 */ addMenuItemControllernull36 fun addMenuItemController(vararg controllers: MenuItemController?): OptionsMenuManager { 37 mControllers.addAll(controllers) 38 return this 39 } 40 41 /** 42 * Inflates [Menu] for the activity. 43 * 44 * This method should be called during [Activity.onCreateOptionsMenu]. 45 */ onCreateOptionsMenunull46 fun onCreateOptionsMenu(menu: Menu) { 47 for (controller in mControllers) { 48 controller?.onCreateOptionsItem(menu) 49 } 50 } 51 52 /** 53 * Prepares the popup to displays all required menu items. 54 * 55 * This method should be called during [Activity.onPrepareOptionsMenu] (Menu)}. 56 */ onPrepareOptionsMenunull57 fun onPrepareOptionsMenu(menu: Menu) { 58 for (controller in mControllers) { 59 controller?.let { 60 val menuItem: MenuItem? = menu.findItem(controller.id) 61 if (menuItem != null) { 62 controller.onPrepareOptionsItem(menuItem) 63 } 64 } 65 } 66 } 67 68 /** 69 * Handles click action for a menu item. 70 * 71 * This method should be called during [Activity.onOptionsItemSelected]. 72 */ onOptionsItemSelectednull73 fun onOptionsItemSelected(item: MenuItem): Boolean { 74 val itemId: Int = item.getItemId() 75 for (controller in mControllers) { 76 if (controller?.id == itemId && controller.onOptionsItemSelected(item)) { 77 return true 78 } 79 } 80 return false 81 } 82 }