blob: db4d899cbb4236e43254db07d8c916803c1a961a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (C) 2018 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.ContentResolver;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.provider.Settings;
import com.android.settings.R;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settingslib.search.SearchIndexable;
/**
* Preference fragment used to control font size.
*/
@SearchIndexable
public class ToggleFontSizePreferenceFragment extends PreviewSeekBarPreferenceFragment {
private float[] mValues;
@Override
protected int getActivityLayoutResId() {
return R.layout.font_size_activity;
}
@Override
protected int[] getPreviewSampleResIds() {
return new int[]{R.layout.font_size_preview};
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final 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]);
}
getActivity().setTitle(R.string.title_font_size);
}
@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 SettingsEnums.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;
}
public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
new BaseSearchIndexProvider() {
@Override
protected boolean isPageSearchEnabled(Context context) {
return false;
}
};
}
|
