1 /*
2  * Copyright (C) 2014 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.statusbar;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.widget.ImageView;
22 
23 /**
24  * An ImageView which supports an attribute specifying whether it has overlapping rendering
25  * commands and therefore does not need a layer when alpha is changed.
26  */
27 public class AlphaOptimizedImageView extends ImageView {
28 
AlphaOptimizedImageView(Context context)29     public AlphaOptimizedImageView(Context context) {
30         this(context, null /* attrs */);
31     }
32 
AlphaOptimizedImageView(Context context, AttributeSet attrs)33     public AlphaOptimizedImageView(Context context, AttributeSet attrs) {
34         this(context, attrs, 0 /* defStyleAttr */);
35     }
36 
AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr)37     public AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr) {
38         this(context, attrs, defStyleAttr, 0 /* defStyleRes */);
39     }
40 
AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)41     public AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr,
42             int defStyleRes) {
43         super(context, attrs, defStyleAttr, defStyleRes);
44     }
45 
46     @Override
hasOverlappingRendering()47     public boolean hasOverlappingRendering() {
48         return false;
49     }
50 }
51