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/*
* 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.app.settings.SettingsEnums;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.Display;
import com.android.settings.R;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settingslib.display.DisplayDensityConfiguration;
import com.android.settingslib.display.DisplayDensityUtils;
import com.android.settingslib.search.SearchIndexable;
/**
* Preference fragment used to control screen zoom.
*/
@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment {
private int mDefaultDensity;
private int[] mValues;
@Override
protected int getActivityLayoutResId() {
return R.layout.screen_zoom_activity;
}
@Override
protected int[] getPreviewSampleResIds() {
return getContext().getResources().getBoolean(
R.bool.config_enable_extra_screen_zoom_preview)
? new int[]{
R.layout.screen_zoom_preview_1,
R.layout.screen_zoom_preview_2,
R.layout.screen_zoom_preview_settings}
: new int[]{R.layout.screen_zoom_preview_1};
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
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();
}
getActivity().setTitle(R.string.screen_zoom_title);
}
@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) {
DisplayDensityConfiguration.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);
} else {
DisplayDensityConfiguration.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);
}
}
@Override
public int getHelpResource() {
return R.string.help_url_display_size;
}
@Override
public int getMetricsCategory() {
return SettingsEnums.DISPLAY_SCREEN_ZOOM;
}
/** Index provider used to expose this fragment in search. */
public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
new BaseSearchIndexProvider() {
@Override
protected boolean isPageSearchEnabled(Context context) {
return false;
}
};
}
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