Michael Kolb | 8872c23 | 2013-01-29 10:33:22 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009 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.camera; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.util.AttributeSet; |
| 21 | |
| 22 | import java.util.ArrayList; |
| 23 | |
| 24 | /** |
| 25 | * A collection of <code>CameraPreference</code>s. It may contain other |
| 26 | * <code>PreferenceGroup</code> and form a tree structure. |
| 27 | */ |
| 28 | public class PreferenceGroup extends CameraPreference { |
| 29 | private ArrayList<CameraPreference> list = |
| 30 | new ArrayList<CameraPreference>(); |
| 31 | |
| 32 | public PreferenceGroup(Context context, AttributeSet attrs) { |
| 33 | super(context, attrs); |
| 34 | } |
| 35 | |
| 36 | public void addChild(CameraPreference child) { |
| 37 | list.add(child); |
| 38 | } |
| 39 | |
| 40 | public void removePreference(int index) { |
| 41 | list.remove(index); |
| 42 | } |
| 43 | |
| 44 | public CameraPreference get(int index) { |
| 45 | return list.get(index); |
| 46 | } |
| 47 | |
| 48 | public int size() { |
| 49 | return list.size(); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public void reloadValue() { |
| 54 | for (CameraPreference pref : list) { |
| 55 | pref.reloadValue(); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Finds the preference with the given key recursively. Returns |
| 61 | * <code>null</code> if cannot find. |
| 62 | */ |
| 63 | public ListPreference findPreference(String key) { |
| 64 | // Find a leaf preference with the given key. Currently, the base |
| 65 | // type of all "leaf" preference is "ListPreference". If we add some |
| 66 | // other types later, we need to change the code. |
| 67 | for (CameraPreference pref : list) { |
| 68 | if (pref instanceof ListPreference) { |
| 69 | ListPreference listPref = (ListPreference) pref; |
| 70 | if(listPref.getKey().equals(key)) return listPref; |
| 71 | } else if(pref instanceof PreferenceGroup) { |
| 72 | ListPreference listPref = |
| 73 | ((PreferenceGroup) pref).findPreference(key); |
| 74 | if (listPref != null) return listPref; |
| 75 | } |
| 76 | } |
| 77 | return null; |
| 78 | } |
| 79 | } |