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/*
* Copyright (C) 2009 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.camera;
import java.util.ArrayList;
import android.content.Context;
import android.util.AttributeSet;
/**
* A collection of <code>CameraPreference</code>s. It may contain other
* <code>PreferenceGroup</code> and form a tree structure.
*/
public class PreferenceGroup extends CameraPreference {
private ArrayList<CameraPreference> list =
new ArrayList<CameraPreference>();
public PreferenceGroup(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void addChild(CameraPreference child) {
list.add(child);
}
public void removePreference(int index) {
list.remove(index);
}
public CameraPreference get(int index) {
return list.get(index);
}
public int size() {
return list.size();
}
@Override
public void reloadValue() {
for (CameraPreference pref : list) {
pref.reloadValue();
}
}
/**
* Finds the preference with the given key recursively. Returns
* <code>null</code> if cannot find.
*/
public ListPreference findPreference(String key) {
// Find a leaf preference with the given key. Currently, the base
// type of all "leaf" preference is "ListPreference". If we add some
// other types later, we need to change the code.
for (CameraPreference pref : list) {
if (pref instanceof ListPreference) {
ListPreference listPref = (ListPreference) pref;
if(listPref.getKey().equals(key)) return listPref;
} else if(pref instanceof PreferenceGroup) {
ListPreference listPref =
((PreferenceGroup) pref).findPreference(key);
if (listPref != null) return listPref;
}
}
return null;
}
}
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