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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 package com.android.settings.display;
     15 
     16 import android.content.Context;
     17 import android.support.v7.preference.Preference;
     18 import android.support.v7.preference.TwoStatePreference;
     19 
     20 import com.android.internal.logging.nano.MetricsProto;
     21 import com.android.internal.view.RotationPolicy;
     22 import com.android.settings.core.PreferenceControllerMixin;
     23 import com.android.settings.core.instrumentation.MetricsFeatureProvider;
     24 import com.android.settings.overlay.FeatureFactory;
     25 import com.android.settingslib.core.AbstractPreferenceController;
     26 import com.android.settingslib.core.lifecycle.Lifecycle;
     27 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     28 import com.android.settingslib.core.lifecycle.events.OnPause;
     29 import com.android.settingslib.core.lifecycle.events.OnResume;
     30 
     31 public class AutoRotatePreferenceController extends AbstractPreferenceController implements
     32         PreferenceControllerMixin, Preference.OnPreferenceChangeListener, LifecycleObserver,
     33         OnResume, OnPause {
     34 
     35     private static final String KEY_AUTO_ROTATE = "auto_rotate";
     36     private final MetricsFeatureProvider mMetricsFeatureProvider;
     37     private TwoStatePreference mPreference;
     38     private RotationPolicy.RotationPolicyListener mRotationPolicyListener;
     39 
     40     public AutoRotatePreferenceController(Context context, Lifecycle lifecycle) {
     41         super(context);
     42         mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
     43         if (lifecycle != null) {
     44             lifecycle.addObserver(this);
     45         }
     46     }
     47 
     48     @Override
     49     public String getPreferenceKey() {
     50         return KEY_AUTO_ROTATE;
     51     }
     52 
     53     @Override
     54     public void updateState(Preference preference) {
     55         mPreference = (TwoStatePreference) preference;
     56         updatePreference();
     57     }
     58 
     59     @Override
     60     public boolean isAvailable() {
     61         return RotationPolicy.isRotationLockToggleVisible(mContext);
     62     }
     63 
     64     @Override
     65     public boolean onPreferenceChange(Preference preference, Object newValue) {
     66         final boolean locked = !(boolean) newValue;
     67         mMetricsFeatureProvider.action(mContext, MetricsProto.MetricsEvent.ACTION_ROTATION_LOCK,
     68                 locked);
     69         RotationPolicy.setRotationLock(mContext, locked);
     70         return true;
     71     }
     72 
     73     @Override
     74     public void onResume() {
     75         if (mRotationPolicyListener == null) {
     76             mRotationPolicyListener = new RotationPolicy.RotationPolicyListener() {
     77                 @Override
     78                 public void onChange() {
     79                     updatePreference();
     80                 }
     81             };
     82         }
     83         RotationPolicy.registerRotationPolicyListener(mContext,
     84                 mRotationPolicyListener);
     85     }
     86 
     87     @Override
     88     public void onPause() {
     89         if (mRotationPolicyListener != null) {
     90             RotationPolicy.unregisterRotationPolicyListener(mContext, mRotationPolicyListener);
     91         }
     92     }
     93 
     94     private void updatePreference() {
     95         if (mPreference == null) {
     96             return;
     97         }
     98         mPreference.setChecked(!RotationPolicy.isRotationLocked(mContext));
     99     }
    100 }
    101