1 /*
2  * Copyright (C) 2016 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.gestures;
18 
19 import android.content.Context;
20 import android.os.Bundle;
21 
22 import androidx.annotation.VisibleForTesting;
23 import androidx.preference.Preference;
24 import androidx.preference.PreferenceScreen;
25 
26 import com.android.settings.R;
27 import com.android.settings.core.TogglePreferenceController;
28 import com.android.settings.widget.VideoPreference;
29 import com.android.settingslib.core.lifecycle.LifecycleObserver;
30 import com.android.settingslib.core.lifecycle.events.OnCreate;
31 import com.android.settingslib.core.lifecycle.events.OnPause;
32 import com.android.settingslib.core.lifecycle.events.OnResume;
33 import com.android.settingslib.core.lifecycle.events.OnSaveInstanceState;
34 
35 public abstract class GesturePreferenceController extends TogglePreferenceController
36         implements Preference.OnPreferenceChangeListener,
37         LifecycleObserver, OnResume, OnPause, OnCreate, OnSaveInstanceState {
38 
39     @VisibleForTesting
40     static final String KEY_VIDEO_PAUSED = "key_video_paused";
41 
42     private VideoPreference mVideoPreference;
43     @VisibleForTesting
44     boolean mVideoPaused;
45 
GesturePreferenceController(Context context, String key)46     public GesturePreferenceController(Context context, String key) {
47         super(context, key);
48     }
49 
50     @Override
displayPreference(PreferenceScreen screen)51     public void displayPreference(PreferenceScreen screen) {
52         super.displayPreference(screen);
53         if (isAvailable()) {
54             mVideoPreference = screen.findPreference(getVideoPrefKey());
55         }
56     }
57 
58     @Override
updateState(Preference preference)59     public void updateState(Preference preference) {
60         super.updateState(preference);
61         if (preference != null) {
62             // Different meanings of "Enabled" for the Preference and Controller.
63             preference.setEnabled(canHandleClicks());
64         }
65     }
66 
67     @Override
getSummary()68     public CharSequence getSummary() {
69         return mContext.getText(
70                 isChecked() ? R.string.gesture_setting_on : R.string.gesture_setting_off);
71     }
72 
73     @Override
onCreate(Bundle savedInstanceState)74     public void onCreate(Bundle savedInstanceState) {
75         if (savedInstanceState != null) {
76             mVideoPaused = savedInstanceState.getBoolean(KEY_VIDEO_PAUSED, false);
77         }
78     }
79 
80     @Override
onSaveInstanceState(Bundle outState)81     public void onSaveInstanceState(Bundle outState) {
82         outState.putBoolean(KEY_VIDEO_PAUSED, mVideoPaused);
83     }
84 
85     @Override
onPause()86     public void onPause() {
87         if (mVideoPreference != null) {
88             mVideoPaused = mVideoPreference.isVideoPaused();
89             mVideoPreference.onViewInvisible();
90         }
91     }
92 
93     @Override
onResume()94     public void onResume() {
95         if (mVideoPreference != null) {
96             mVideoPreference.onViewVisible(mVideoPaused);
97         }
98     }
99 
getVideoPrefKey()100     protected abstract String getVideoPrefKey();
101 
canHandleClicks()102     protected boolean canHandleClicks() {
103         return true;
104     }
105 }
106