/*
* 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 com.android.settings.display;
import android.annotation.Nullable;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.Display;
import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.settings.PreviewSeekBarPreferenceFragment;
import com.android.settings.R;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settings.search.Indexable;
import com.android.settings.search.SearchIndexableRaw;
import com.android.settingslib.display.DisplayDensityUtils;
import java.util.ArrayList;
import java.util.List;
/**
* Preference fragment used to control screen zoom.
*/
public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment implements Indexable {
private int mDefaultDensity;
private int[] mValues;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mActivityLayoutResId = R.layout.screen_zoom_activity;
// This should be replaced once the final preview sample screen is in place.
mPreviewSampleResIds = new int[]{R.layout.screen_zoom_preview_1,
R.layout.screen_zoom_preview_2,
R.layout.screen_zoom_preview_settings};
final DisplayDensityUtils density = new DisplayDensityUtils(getContext());
final int initialIndex = density.getCurrentIndex();
if (initialIndex < 0) {
// Failed to obtain default density, which means we failed to
// connect to the window manager service. Just use the current
// density and don't let the user change anything.
final int densityDpi = getResources().getDisplayMetrics().densityDpi;
mValues = new int[] { densityDpi };
mEntries = new String[] { getString(DisplayDensityUtils.SUMMARY_DEFAULT) };
mInitialIndex = 0;
mDefaultDensity = densityDpi;
} else {
mValues = density.getValues();
mEntries = density.getEntries();
mInitialIndex = initialIndex;
mDefaultDensity = density.getDefaultDensity();
}
}
@Override
protected Configuration createConfig(Configuration origConfig, int index) {
// Populate the sample layouts.
final Configuration config = new Configuration(origConfig);
config.densityDpi = mValues[index];
return config;
}
/**
* Persists the selected density and sends a configuration change.
*/
@Override
protected void commit() {
final int densityDpi = mValues[mCurrentIndex];
if (densityDpi == mDefaultDensity) {
DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);
} else {
DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);
}
}
@Override
protected int getMetricsCategory() {
return MetricsEvent.DISPLAY_SCREEN_ZOOM;
}
/** Index provider used to expose this fragment in search. */
public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
new BaseSearchIndexProvider() {
@Override
public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
final Resources res = context.getResources();
final SearchIndexableRaw data = new SearchIndexableRaw(context);
data.title = res.getString(R.string.screen_zoom_title);
data.screenTitle = res.getString(R.string.screen_zoom_title);
data.keywords = res.getString(R.string.screen_zoom_keywords);
final List<SearchIndexableRaw> result = new ArrayList<>(1);
result.add(data);
return result;
}
};
}