1/*
2 * Copyright (C) 2007 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
17package android.preference;
18
19import android.content.Context;
20import android.util.AttributeSet;
21
22/**
23 * Used to group {@link Preference} objects
24 * and provide a disabled title above the group.
25 *
26 * <div class="special reference">
27 * <h3>Developer Guides</h3>
28 * <p>For information about building a settings UI with Preferences,
29 * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
30 * guide.</p>
31 * </div>
32 */
33public class PreferenceCategory extends PreferenceGroup {
34    private static final String TAG = "PreferenceCategory";
35
36    public PreferenceCategory(
37            Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
38        super(context, attrs, defStyleAttr, defStyleRes);
39    }
40
41    public PreferenceCategory(Context context, AttributeSet attrs, int defStyleAttr) {
42        this(context, attrs, defStyleAttr, 0);
43    }
44
45    public PreferenceCategory(Context context, AttributeSet attrs) {
46        this(context, attrs, com.android.internal.R.attr.preferenceCategoryStyle);
47    }
48
49    public PreferenceCategory(Context context) {
50        this(context, null);
51    }
52
53    @Override
54    protected boolean onPrepareAddPreference(Preference preference) {
55        if (preference instanceof PreferenceCategory) {
56            throw new IllegalArgumentException(
57                    "Cannot add a " + TAG + " directly to a " + TAG);
58        }
59
60        return super.onPrepareAddPreference(preference);
61    }
62
63    @Override
64    public boolean isEnabled() {
65        return false;
66    }
67
68    @Override
69    public boolean shouldDisableDependents() {
70        return !super.isEnabled();
71    }
72}
73