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      1 /*
      2  * Copyright (C) 2017 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.security.screenlock;
     18 
     19 import android.app.admin.DevicePolicyManager;
     20 import android.content.Context;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.TwoStatePreference;
     23 
     24 import com.android.internal.widget.LockPatternUtils;
     25 import com.android.settings.core.PreferenceControllerMixin;
     26 import com.android.settingslib.core.AbstractPreferenceController;
     27 
     28 public class PatternVisiblePreferenceController extends AbstractPreferenceController
     29         implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
     30 
     31     private static final String PREF_KEY = "visiblepattern";
     32 
     33     private final int mUserId;
     34     private final LockPatternUtils mLockPatternUtils;
     35 
     36     public PatternVisiblePreferenceController(Context context, int userId,
     37             LockPatternUtils lockPatternUtils) {
     38         super(context);
     39         mUserId = userId;
     40         mLockPatternUtils = lockPatternUtils;
     41     }
     42 
     43     @Override
     44     public boolean isAvailable() {
     45         return isPatternLock();
     46     }
     47 
     48     @Override
     49     public String getPreferenceKey() {
     50         return PREF_KEY;
     51     }
     52 
     53     @Override
     54     public void updateState(Preference preference) {
     55         ((TwoStatePreference) preference).setChecked(
     56                 mLockPatternUtils.isVisiblePatternEnabled(mUserId));
     57     }
     58 
     59     private boolean isPatternLock() {
     60         return mLockPatternUtils.isSecure(mUserId)
     61                 && mLockPatternUtils.getKeyguardStoredPasswordQuality(mUserId)
     62                 == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING;
     63     }
     64 
     65     @Override
     66     public boolean onPreferenceChange(Preference preference, Object newValue) {
     67         mLockPatternUtils.setVisiblePatternEnabled((Boolean) newValue, mUserId);
     68         return true;
     69     }
     70 }
     71