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      1 /*
      2  * Copyright (C) 2013 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.os.Bundle;
     20 import android.provider.Settings;
     21 import android.support.v7.preference.ListPreference;
     22 import android.support.v7.preference.Preference;
     23 import android.view.View;
     24 import android.view.accessibility.AccessibilityManager;
     25 import android.widget.Switch;
     26 
     27 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     28 import com.android.settings.R;
     29 import com.android.settings.widget.SwitchBar;
     30 
     31 public class ToggleDaltonizerPreferenceFragment extends ToggleFeaturePreferenceFragment
     32         implements Preference.OnPreferenceChangeListener, SwitchBar.OnSwitchChangeListener {
     33     private static final String ENABLED = Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED;
     34     private static final String TYPE = Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER;
     35     private static final int DEFAULT_TYPE = AccessibilityManager.DALTONIZER_CORRECT_DEUTERANOMALY;
     36 
     37     private ListPreference mType;
     38 
     39     @Override
     40     public int getMetricsCategory() {
     41         return MetricsEvent.ACCESSIBILITY_TOGGLE_DALTONIZER;
     42     }
     43 
     44     @Override
     45     protected int getHelpResource() {
     46         return R.string.help_url_color_correction;
     47     }
     48 
     49     @Override
     50     public void onCreate(Bundle savedInstanceState) {
     51         super.onCreate(savedInstanceState);
     52 
     53         addPreferencesFromResource(R.xml.accessibility_daltonizer_settings);
     54 
     55         mType = (ListPreference) findPreference("type");
     56 
     57         if (!AccessibilitySettings.isColorTransformAccelerated(getActivity())) {
     58             mFooterPreferenceMixin.createFooterPreference().setTitle(
     59                     R.string.accessibility_display_daltonizer_preference_subtitle);
     60         }
     61         initPreferences();
     62     }
     63 
     64     @Override
     65     protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
     66         Settings.Secure.putInt(getContentResolver(), ENABLED, enabled ? 1 : 0);
     67     }
     68 
     69     @Override
     70     public boolean onPreferenceChange(Preference preference, Object newValue) {
     71         if (preference == mType) {
     72             Settings.Secure.putInt(getContentResolver(), TYPE, Integer.parseInt((String) newValue));
     73             preference.setSummary("%s");
     74         }
     75 
     76         return true;
     77     }
     78 
     79     @Override
     80     public void onViewCreated(View view, Bundle savedInstanceState) {
     81         super.onViewCreated(view, savedInstanceState);
     82 
     83         setTitle(getString(R.string.accessibility_display_daltonizer_preference_title));
     84     }
     85 
     86     @Override
     87     protected void onInstallSwitchBarToggleSwitch() {
     88         super.onInstallSwitchBarToggleSwitch();
     89 
     90         mSwitchBar.setCheckedInternal(
     91                 Settings.Secure.getInt(getContentResolver(), ENABLED, 0) == 1);
     92         mSwitchBar.addOnSwitchChangeListener(this);
     93     }
     94 
     95     @Override
     96     protected void onRemoveSwitchBarToggleSwitch() {
     97         super.onRemoveSwitchBarToggleSwitch();
     98         mSwitchBar.removeOnSwitchChangeListener(this);
     99     }
    100 
    101     private void initPreferences() {
    102         final String value = Integer.toString(
    103                 Settings.Secure.getInt(getContentResolver(), TYPE, DEFAULT_TYPE));
    104         mType.setValue(value);
    105         mType.setOnPreferenceChangeListener(this);
    106         final int index = mType.findIndexOfValue(value);
    107         if (index < 0) {
    108             // We're using a mode controlled by developer preferences.
    109             mType.setSummary(getString(R.string.daltonizer_type_overridden,
    110                     getString(R.string.simulate_color_space)));
    111         }
    112     }
    113 
    114     @Override
    115     public void onSwitchChanged(Switch switchView, boolean isChecked) {
    116         onPreferenceToggled(mPreferenceKey, isChecked);
    117     }
    118 }
    119