1 /* 2 * Copyright (C) 2017 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.settings.wifi.p2p; 18 19 import android.content.Context; 20 21 import androidx.preference.Preference; 22 import androidx.preference.PreferenceGroup; 23 import androidx.preference.PreferenceScreen; 24 25 import com.android.settings.core.PreferenceControllerMixin; 26 import com.android.settingslib.core.AbstractPreferenceController; 27 28 public abstract class P2pCategoryPreferenceController extends AbstractPreferenceController 29 implements PreferenceControllerMixin { 30 31 protected PreferenceGroup mCategory; 32 P2pCategoryPreferenceController(Context context)33 public P2pCategoryPreferenceController(Context context) { 34 super(context); 35 } 36 37 @Override isAvailable()38 public boolean isAvailable() { 39 return mCategory.getPreferenceCount() > 0; 40 } 41 42 @Override displayPreference(PreferenceScreen screen)43 public void displayPreference(PreferenceScreen screen) { 44 mCategory = screen.findPreference(getPreferenceKey()); 45 super.displayPreference(screen); 46 } 47 removeAllChildren()48 public void removeAllChildren() { 49 if (mCategory != null) { 50 mCategory.removeAll(); 51 mCategory.setVisible(false); 52 } 53 } 54 addChild(Preference child)55 public void addChild(Preference child) { 56 if (mCategory != null) { 57 mCategory.addPreference(child); 58 mCategory.setVisible(true); 59 } 60 } 61 setEnabled(boolean enabled)62 public void setEnabled(boolean enabled) { 63 if (mCategory != null) { 64 mCategory.setEnabled(enabled); 65 } 66 } 67 } 68