Home | History | Annotate | Download | only in ui 
      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;
     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 android.support.v17.leanback.app.BackgroundManager;
     25 
     26 /**
     27  * The Background Helper.
     28  */
     29 public class DetailsViewBackgroundHelper {
     30     // Background delay serves to avoid kicking off expensive bitmap loading
     31     // in case multiple backgrounds are set in quick succession.
     32     private static final int SET_BACKGROUND_DELAY_MS = 100;
     33 
     34     private final BackgroundManager mBackgroundManager;
     35 
     36     class LoadBackgroundRunnable implements Runnable {
     37         final Drawable mBackGround;
     38 
     39         LoadBackgroundRunnable(Drawable background) {
     40             mBackGround = background;
     41         }
     42 
     43         @Override
     44         public void run() {
     45             if (!mBackgroundManager.isAttached()) {
     46                 return;
     47             }
     48             if (mBackGround instanceof BitmapDrawable) {
     49                 mBackgroundManager.setBitmap(((BitmapDrawable) mBackGround).getBitmap());
     50             }
     51             mRunnable = null;
     52         }
     53     }
     54 
     55     private LoadBackgroundRunnable mRunnable;
     56 
     57     private final Handler mHandler = new Handler();
     58 
     59     public DetailsViewBackgroundHelper(Activity activity) {
     60         mBackgroundManager = BackgroundManager.getInstance(activity);
     61         mBackgroundManager.attach(activity.getWindow());
     62     }
     63 
     64     /**
     65      * Sets the given image to background.
     66      */
     67     public void setBackground(Drawable background) {
     68         if (mRunnable != null) {
     69             mHandler.removeCallbacks(mRunnable);
     70         }
     71         mRunnable = new LoadBackgroundRunnable(background);
     72         mHandler.postDelayed(mRunnable, SET_BACKGROUND_DELAY_MS);
     73     }
     74 
     75     /**
     76      * Sets the background color.
     77      */
     78     public void setBackgroundColor(int color) {
     79         if (mBackgroundManager.isAttached()) {
     80             mBackgroundManager.setColor(color);
     81         }
     82     }
     83 
     84     /**
     85      * Sets the background scrim.
     86      */
     87     public void setScrim(int color) {
     88         if (mBackgroundManager.isAttached()) {
     89             mBackgroundManager.setDimLayer(new ColorDrawable(color));
     90         }
     91     }
     92 }
     93