1 /*
2  * Copyright (C) 2022 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.systemui.media.dialog;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.widget.SeekBar;
22 
23 /**
24  * Customized SeekBar for MediaOutputDialog, apply scale between device volume and progress, to make
25  * adjustment smoother.
26  */
27 public class MediaOutputSeekbar extends SeekBar {
28     private static final int SCALE_SIZE = 1000;
29     private static final int INITIAL_PROGRESS = 500;
30     public static final int VOLUME_PERCENTAGE_SCALE_SIZE = 100000;
31 
MediaOutputSeekbar(Context context, AttributeSet attrs)32     public MediaOutputSeekbar(Context context, AttributeSet attrs) {
33         super(context, attrs);
34         setMin(0);
35     }
36 
scaleProgressToVolume(int progress)37     static int scaleProgressToVolume(int progress) {
38         return progress / SCALE_SIZE;
39     }
40 
scaleVolumeToProgress(int volume)41     static int scaleVolumeToProgress(int volume) {
42         return volume == 0 ? 0 : INITIAL_PROGRESS + volume * SCALE_SIZE;
43     }
44 
getVolume()45     int getVolume() {
46         return getProgress() / SCALE_SIZE;
47     }
48 
setVolume(int volume)49     void setVolume(int volume) {
50         setProgress(scaleVolumeToProgress(volume), true);
51     }
52 
setMaxVolume(int maxVolume)53     void setMaxVolume(int maxVolume) {
54         setMax(maxVolume * SCALE_SIZE);
55     }
56 
resetVolume()57     void resetVolume() {
58         setProgress(getMin());
59     }
60 }
61