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.tv.dvr.ui.browse;
18 
19 import android.app.Activity;
20 import android.graphics.drawable.BitmapDrawable;
21 import android.graphics.drawable.ColorDrawable;
22 import android.graphics.drawable.Drawable;
23 import android.os.Handler;
24 import androidx.leanback.app.BackgroundManager;
25 
26 /** The Background Helper. */
27 public class DetailsViewBackgroundHelper {
28     // Background delay serves to avoid kicking off expensive bitmap loading
29     // in case multiple backgrounds are set in quick succession.
30     private static final int SET_BACKGROUND_DELAY_MS = 100;
31 
32     private final BackgroundManager mBackgroundManager;
33 
34     class LoadBackgroundRunnable implements Runnable {
35         final Drawable mBackGround;
36 
LoadBackgroundRunnable(Drawable background)37         LoadBackgroundRunnable(Drawable background) {
38             mBackGround = background;
39         }
40 
41         @Override
run()42         public void run() {
43             if (!mBackgroundManager.isAttached()) {
44                 return;
45             }
46             if (mBackGround instanceof BitmapDrawable) {
47                 mBackgroundManager.setBitmap(((BitmapDrawable) mBackGround).getBitmap());
48             }
49             mRunnable = null;
50         }
51     }
52 
53     private LoadBackgroundRunnable mRunnable;
54 
55     private final Handler mHandler = new Handler();
56 
DetailsViewBackgroundHelper(Activity activity)57     public DetailsViewBackgroundHelper(Activity activity) {
58         mBackgroundManager = BackgroundManager.getInstance(activity);
59         mBackgroundManager.attach(activity.getWindow());
60         mBackgroundManager.setAutoReleaseOnStop(false);
61     }
62 
63     /** Sets the given image to background. */
setBackground(Drawable background)64     public void setBackground(Drawable background) {
65         if (mRunnable != null) {
66             mHandler.removeCallbacks(mRunnable);
67         }
68         mRunnable = new LoadBackgroundRunnable(background);
69         mHandler.postDelayed(mRunnable, SET_BACKGROUND_DELAY_MS);
70     }
71 
72     /** Sets the background color. */
setBackgroundColor(int color)73     public void setBackgroundColor(int color) {
74         if (mBackgroundManager.isAttached()) {
75             mBackgroundManager.setColor(color);
76         }
77     }
78 
79     /** Sets the background scrim. */
setScrim(int color)80     public void setScrim(int color) {
81         if (mBackgroundManager.isAttached()) {
82             mBackgroundManager.setDimLayer(new ColorDrawable(color));
83         }
84     }
85 }
86