/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.display;
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import android.annotation.Nullable;
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import android.app.settings.SettingsEnums;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.os.Bundle;
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import android.view.Display;
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import com.android.settings.R;
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import com.android.settings.search.BaseSearchIndexProvider;
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import com.android.settings.search.Indexable;
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import com.android.settings.search.SearchIndexableRaw;
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import com.android.settingslib.display.DisplayDensityUtils;
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import com.android.settingslib.search.SearchIndexable;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Preference fragment used to control screen zoom.
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*/
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@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
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public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment {
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private int mDefaultDensity;
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private int[] mValues;
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@Override
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protected int getActivityLayoutResId() {
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return R.layout.screen_zoom_activity;
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}
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@Override
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protected int[] getPreviewSampleResIds() {
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return getContext().getResources().getBoolean(
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R.bool.config_enable_extra_screen_zoom_preview)
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? new int[]{
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R.layout.screen_zoom_preview_1,
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R.layout.screen_zoom_preview_2,
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R.layout.screen_zoom_preview_settings}
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: new int[]{R.layout.screen_zoom_preview_1};
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}
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@Override
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public void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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final DisplayDensityUtils density = new DisplayDensityUtils(getContext());
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final int initialIndex = density.getCurrentIndex();
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if (initialIndex < 0) {
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// Failed to obtain default density, which means we failed to
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// connect to the window manager service. Just use the current
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// density and don't let the user change anything.
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final int densityDpi = getResources().getDisplayMetrics().densityDpi;
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mValues = new int[]{densityDpi};
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mEntries = new String[]{getString(DisplayDensityUtils.SUMMARY_DEFAULT)};
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mInitialIndex = 0;
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mDefaultDensity = densityDpi;
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} else {
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mValues = density.getValues();
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mEntries = density.getEntries();
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mInitialIndex = initialIndex;
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mDefaultDensity = density.getDefaultDensity();
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}
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getActivity().setTitle(R.string.screen_zoom_title);
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}
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@Override
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protected Configuration createConfig(Configuration origConfig, int index) {
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// Populate the sample layouts.
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final Configuration config = new Configuration(origConfig);
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config.densityDpi = mValues[index];
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return config;
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}
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/**
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* Persists the selected density and sends a configuration change.
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*/
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@Override
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protected void commit() {
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final int densityDpi = mValues[mCurrentIndex];
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if (densityDpi == mDefaultDensity) {
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DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);
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} else {
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DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);
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}
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}
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@Override
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public int getHelpResource() {
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return R.string.help_url_display_size;
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}
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@Override
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public int getMetricsCategory() {
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return SettingsEnums.DISPLAY_SCREEN_ZOOM;
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}
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/** Index provider used to expose this fragment in search. */
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public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
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new BaseSearchIndexProvider() {
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@Override
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public List<SearchIndexableRaw> getRawDataToIndex(Context context,
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boolean enabled) {
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final Resources res = context.getResources();
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final SearchIndexableRaw data = new SearchIndexableRaw(context);
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data.title = res.getString(R.string.screen_zoom_title);
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data.key = "screen_zoom_settings";
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data.screenTitle = res.getString(R.string.screen_zoom_title);
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data.keywords = res.getString(R.string.screen_zoom_keywords);
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final List<SearchIndexableRaw> result = new ArrayList<>(1);
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result.add(data);
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return result;
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}
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};
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}
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