1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.accessibility; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.content.res.Resources; 22 import android.database.ContentObserver; 23 import android.os.Handler; 24 import android.os.Looper; 25 import android.provider.Settings; 26 import android.view.View; 27 28 import androidx.annotation.NonNull; 29 import androidx.lifecycle.DefaultLifecycleObserver; 30 import androidx.lifecycle.LifecycleOwner; 31 import androidx.preference.Preference; 32 import androidx.preference.PreferenceScreen; 33 34 import com.android.settings.R; 35 import com.android.settings.core.BasePreferenceController; 36 import com.android.settingslib.widget.SelectorWithWidgetPreference; 37 38 import java.util.HashMap; 39 import java.util.Map; 40 41 /** Controller class that control radio button of accessibility daltonizer settings. */ 42 public class DaltonizerRadioButtonPreferenceController extends BasePreferenceController implements 43 DefaultLifecycleObserver, SelectorWithWidgetPreference.OnClickListener { 44 private static final String DALTONIZER_TYPE_SETTINGS_KEY = 45 Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER; 46 47 // pair the preference key and daltonizer value. 48 private final Map<String, Integer> mAccessibilityDaltonizerKeyToValueMap = new HashMap<>(); 49 50 // RadioButtonPreference key, each preference represent a daltonizer value. 51 private final ContentResolver mContentResolver; 52 private final ContentObserver mSettingsContentObserver; 53 private final Resources mResources; 54 private SelectorWithWidgetPreference mPreference; 55 DaltonizerRadioButtonPreferenceController(Context context, String preferenceKey)56 public DaltonizerRadioButtonPreferenceController(Context context, String preferenceKey) { 57 super(context, preferenceKey); 58 mContentResolver = context.getContentResolver(); 59 mResources = context.getResources(); 60 mSettingsContentObserver = new ContentObserver(new Handler(Looper.getMainLooper())) { 61 @Override 62 public void onChange(boolean selfChange) { 63 if (mPreference != null) { 64 updateState(mPreference); 65 } 66 } 67 }; 68 } 69 getDaltonizerValueToKeyMap()70 private Map<String, Integer> getDaltonizerValueToKeyMap() { 71 if (mAccessibilityDaltonizerKeyToValueMap.isEmpty()) { 72 73 final String[] daltonizerKeys = mResources.getStringArray( 74 R.array.daltonizer_mode_keys); 75 76 final int[] daltonizerValues = mResources.getIntArray( 77 R.array.daltonizer_type_values); 78 79 final int daltonizerValueCount = daltonizerValues.length; 80 for (int i = 0; i < daltonizerValueCount; i++) { 81 mAccessibilityDaltonizerKeyToValueMap.put(daltonizerKeys[i], daltonizerValues[i]); 82 } 83 } 84 return mAccessibilityDaltonizerKeyToValueMap; 85 } 86 handlePreferenceChange(String value)87 private void handlePreferenceChange(String value) { 88 Settings.Secure.putString(mContentResolver, DALTONIZER_TYPE_SETTINGS_KEY, value); 89 } 90 91 @Override getAvailabilityStatus()92 public int getAvailabilityStatus() { 93 return AVAILABLE; 94 } 95 96 @Override displayPreference(PreferenceScreen screen)97 public void displayPreference(PreferenceScreen screen) { 98 super.displayPreference(screen); 99 mPreference = (SelectorWithWidgetPreference) 100 screen.findPreference(getPreferenceKey()); 101 mPreference.setOnClickListener(this); 102 mPreference.setAppendixVisibility(View.GONE); 103 } 104 105 @Override onRadioButtonClicked(SelectorWithWidgetPreference preference)106 public void onRadioButtonClicked(SelectorWithWidgetPreference preference) { 107 final int value = getDaltonizerValueToKeyMap().get(mPreferenceKey); 108 handlePreferenceChange(String.valueOf(value)); 109 } 110 getAccessibilityDaltonizerValue()111 private int getAccessibilityDaltonizerValue() { 112 final int daltonizerValue = 113 DaltonizerPreferenceUtil.getSecureAccessibilityDaltonizerValue(mContentResolver); 114 return daltonizerValue; 115 } 116 117 @Override updateState(Preference preference)118 public void updateState(Preference preference) { 119 super.updateState(preference); 120 final int daltonizerValueInSetting = getAccessibilityDaltonizerValue(); 121 final int preferenceValue = getDaltonizerValueToKeyMap().get(mPreference.getKey()); 122 mPreference.setChecked(preferenceValue == daltonizerValueInSetting); 123 } 124 125 @Override onResume(@onNull LifecycleOwner owner)126 public void onResume(@NonNull LifecycleOwner owner) { 127 mContentResolver.registerContentObserver( 128 Settings.Secure.getUriFor(DALTONIZER_TYPE_SETTINGS_KEY), 129 /* notifyForDescendants= */ false, 130 mSettingsContentObserver 131 ); 132 } 133 134 @Override onPause(@onNull LifecycleOwner owner)135 public void onPause(@NonNull LifecycleOwner owner) { 136 mContentResolver.unregisterContentObserver(mSettingsContentObserver); 137 } 138 } 139