| /* |
| * Copyright (C) 2015 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 android.support.v7.preference; |
| |
| import android.content.Context; |
| import android.support.v4.content.res.TypedArrayUtils; |
| import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; |
| import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat.CollectionItemInfoCompat; |
| import android.util.AttributeSet; |
| |
| /** |
| * Used to group {@link Preference} objects and provide a disabled title above |
| * the group. |
| * |
| * <div class="special reference"> |
| * <h3>Developer Guides</h3> |
| * <p>For information about building a settings UI with Preferences, |
| * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a> |
| * guide.</p> |
| * </div> |
| */ |
| public class PreferenceCategory extends PreferenceGroup { |
| private static final String TAG = "PreferenceCategory"; |
| |
| public PreferenceCategory( |
| Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| public PreferenceCategory(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public PreferenceCategory(Context context, AttributeSet attrs) { |
| this(context, attrs, TypedArrayUtils.getAttr(context, R.attr.preferenceCategoryStyle, |
| android.R.attr.preferenceCategoryStyle)); |
| } |
| |
| public PreferenceCategory(Context context) { |
| this(context, null); |
| } |
| |
| @Override |
| protected boolean onPrepareAddPreference(Preference preference) { |
| if (preference instanceof PreferenceCategory) { |
| throw new IllegalArgumentException( |
| "Cannot add a " + TAG + " directly to a " + TAG); |
| } |
| |
| return super.onPrepareAddPreference(preference); |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| return false; |
| } |
| |
| @Override |
| public boolean shouldDisableDependents() { |
| return !super.isEnabled(); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfoCompat info) { |
| super.onInitializeAccessibilityNodeInfo(info); |
| |
| CollectionItemInfoCompat existingItemInfo = info.getCollectionItemInfo(); |
| if (existingItemInfo == null) { |
| return; |
| } |
| |
| final CollectionItemInfoCompat newItemInfo = CollectionItemInfoCompat.obtain( |
| existingItemInfo.getRowIndex(), |
| existingItemInfo.getRowSpan(), |
| existingItemInfo.getColumnIndex(), |
| existingItemInfo.getColumnSpan(), |
| true /* heading */, |
| existingItemInfo.isSelected()); |
| info.setCollectionItemInfo(newItemInfo); |
| } |
| } |