1 /*
2  * Copyright (C) 2018 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.car.settings.common;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.view.View;
22 import android.widget.CompoundButton;
23 import android.widget.Switch;
24 
25 import com.android.car.settings.R;
26 import com.android.car.ui.preference.CarUiTwoActionPreference;
27 
28 /** A preference that can be clicked on one side and toggled on another. */
29 public class MasterSwitchPreference extends CarUiTwoActionPreference {
30 
31     /**
32      * Interface definition for a callback to be invoked when the switch is toggled.
33      */
34     public interface OnSwitchToggleListener {
35         /**
36          * Called when a switch was toggled.
37          *
38          * @param preference the preference whose switch was toggled.
39          * @param isChecked  the new state of the switch.
40          */
onToggle(MasterSwitchPreference preference, boolean isChecked)41         void onToggle(MasterSwitchPreference preference, boolean isChecked);
42     }
43 
44     private Switch mSwitch;
45     private boolean mIsChecked;
46     private OnSwitchToggleListener mToggleListener;
47 
48     private final CompoundButton.OnCheckedChangeListener mCheckedChangeListener =
49             (buttonView, isChecked) -> {
50                 if (mToggleListener != null) {
51                     mToggleListener.onToggle(this, isChecked);
52                 }
53             };
54 
MasterSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)55     public MasterSwitchPreference(Context context, AttributeSet attrs,
56             int defStyleAttr, int defStyleRes) {
57         super(context, attrs, defStyleAttr, defStyleRes);
58         init();
59     }
60 
MasterSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr)61     public MasterSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr) {
62         super(context, attrs, defStyleAttr);
63         init();
64     }
65 
MasterSwitchPreference(Context context, AttributeSet attrs)66     public MasterSwitchPreference(Context context, AttributeSet attrs) {
67         super(context, attrs);
68         init();
69     }
70 
MasterSwitchPreference(Context context)71     public MasterSwitchPreference(Context context) {
72         super(context);
73         init();
74     }
75 
init()76     private void init() {
77         setWidgetLayoutResource(R.layout.master_switch_widget);
78     }
79 
80     /** Sets the listener that handles the change in switch state. */
setSwitchToggleListener(OnSwitchToggleListener listener)81     public void setSwitchToggleListener(OnSwitchToggleListener listener) {
82         mToggleListener = listener;
83     }
84 
85     /** Gets the listener that handles the change in switch state. */
getSwitchToggleListener()86     public OnSwitchToggleListener getSwitchToggleListener() {
87         return mToggleListener;
88     }
89 
90     @Override
onBindWidgetFrame(View widgetFrame)91     protected void onBindWidgetFrame(View widgetFrame) {
92         mSwitch = widgetFrame.findViewById(R.id.master_switch);
93         mSwitch.setChecked(mIsChecked);
94         mSwitch.setOnCheckedChangeListener(mCheckedChangeListener);
95         widgetFrame.setOnClickListener(v -> setSwitchChecked(!mIsChecked));
96     }
97 
98     /**
99      * Sets the state of the switch. Can be set even when it isn't visible or bound in order to set
100      * the initial state.
101      */
setSwitchChecked(boolean checked)102     public void setSwitchChecked(boolean checked) {
103         mIsChecked = checked;
104         if (!isActionShown()) {
105             return;
106         }
107 
108         if (mSwitch != null) {
109             mSwitch.setChecked(checked);
110         }
111     }
112 
113     /** Gets the state of the switch. */
isSwitchChecked()114     public boolean isSwitchChecked() {
115         return mIsChecked;
116     }
117 }
118