| /* |
| * Copyright (C) 2017 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.settings.widget; |
| |
| import android.content.Context; |
| |
| import com.android.settings.core.BasePreferenceController; |
| import com.android.settingslib.core.AbstractPreferenceController; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A controller for generic Preference categories. If all controllers for its children reports |
| * not-available, this controller will also report not-available, and subsequently will be hidden by |
| * UI. |
| */ |
| public class PreferenceCategoryController extends BasePreferenceController { |
| |
| private final String mKey; |
| private final List<AbstractPreferenceController> mChildren; |
| |
| public PreferenceCategoryController(Context context, String key) { |
| super(context, key); |
| mKey = key; |
| mChildren = new ArrayList<>(); |
| } |
| |
| @Override |
| public int getAvailabilityStatus() { |
| if (mChildren == null || mChildren.isEmpty()) { |
| return UNSUPPORTED_ON_DEVICE; |
| } |
| // Category is available if any child is available |
| for (AbstractPreferenceController controller : mChildren) { |
| if (controller.isAvailable()) { |
| return AVAILABLE; |
| } |
| } |
| return CONDITIONALLY_UNAVAILABLE; |
| } |
| |
| @Override |
| public String getPreferenceKey() { |
| return mKey; |
| } |
| |
| public PreferenceCategoryController setChildren( |
| List<AbstractPreferenceController> childrenController) { |
| mChildren.clear(); |
| if (childrenController != null) { |
| mChildren.addAll(childrenController); |
| } |
| return this; |
| } |
| } |