102 lines
3.5 KiB
Java
102 lines
3.5 KiB
Java
/*
|
|
* 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.accessibility;
|
|
|
|
import android.annotation.Nullable;
|
|
import android.content.ContentResolver;
|
|
import android.content.res.Configuration;
|
|
import android.content.res.Resources;
|
|
import android.os.Bundle;
|
|
import android.provider.Settings;
|
|
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
|
|
import com.android.settings.PreviewSeekBarPreferenceFragment;
|
|
import com.android.settings.R;
|
|
|
|
/**
|
|
* Preference fragment used to control font size.
|
|
*/
|
|
public class ToggleFontSizePreferenceFragment extends PreviewSeekBarPreferenceFragment {
|
|
|
|
private float[] mValues;
|
|
|
|
@Override
|
|
public void onCreate(@Nullable Bundle savedInstanceState) {
|
|
super.onCreate(savedInstanceState);
|
|
|
|
mActivityLayoutResId = R.layout.font_size_activity;
|
|
mPreviewSampleResIds = new int[]{R.layout.font_size_preview};
|
|
|
|
Resources res = getContext().getResources();
|
|
final ContentResolver resolver = getContext().getContentResolver();
|
|
// Mark the appropriate item in the preferences list.
|
|
mEntries = res.getStringArray(R.array.entries_font_size);
|
|
final String[] strEntryValues = res.getStringArray(R.array.entryvalues_font_size);
|
|
final float currentScale =
|
|
Settings.System.getFloat(resolver, Settings.System.FONT_SCALE, 1.0f);
|
|
mInitialIndex = fontSizeValueToIndex(currentScale, strEntryValues);
|
|
mValues = new float[strEntryValues.length];
|
|
for (int i = 0; i < strEntryValues.length; ++i) {
|
|
mValues[i] = Float.parseFloat(strEntryValues[i]);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected Configuration createConfig(Configuration origConfig, int index) {
|
|
// Populate the sample layouts.
|
|
final Configuration config = new Configuration(origConfig);
|
|
config.fontScale = mValues[index];
|
|
return config;
|
|
}
|
|
|
|
/**
|
|
* Persists the selected font size.
|
|
*/
|
|
@Override
|
|
protected void commit() {
|
|
if (getContext() == null) return;
|
|
final ContentResolver resolver = getContext().getContentResolver();
|
|
Settings.System.putFloat(resolver, Settings.System.FONT_SCALE, mValues[mCurrentIndex]);
|
|
}
|
|
|
|
@Override
|
|
public int getHelpResource() {
|
|
return R.string.help_url_font_size;
|
|
}
|
|
|
|
@Override
|
|
public int getMetricsCategory() {
|
|
return MetricsEvent.ACCESSIBILITY_FONT_SIZE;
|
|
}
|
|
|
|
/**
|
|
* Utility function that returns the index in a string array with which the represented value is
|
|
* the closest to a given float value.
|
|
*/
|
|
public static int fontSizeValueToIndex(float val, String[] indices) {
|
|
float lastVal = Float.parseFloat(indices[0]);
|
|
for (int i=1; i<indices.length; i++) {
|
|
float thisVal = Float.parseFloat(indices[i]);
|
|
if (val < (lastVal + (thisVal-lastVal)*.5f)) {
|
|
return i-1;
|
|
}
|
|
lastVal = thisVal;
|
|
}
|
|
return indices.length-1;
|
|
}
|
|
|
|
}
|