1 /*
2  * Copyright (C) 2011 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.camera.ui;
18 
19 import com.android.camera.R;
20 
21 import android.content.Context;
22 import android.util.AttributeSet;
23 import android.widget.ImageView;
24 
25 /**
26  * A @{code ImageView} which change the opacity of the icon if disabled.
27  */
28 public class TwoStateImageView extends ImageView {
29     private final float DISABLED_ALPHA = 0.4f;
30     private boolean mFilterEnabled = true;
31 
TwoStateImageView(Context context, AttributeSet attrs)32     public TwoStateImageView(Context context, AttributeSet attrs) {
33         super(context, attrs);
34     }
35 
TwoStateImageView(Context context)36     public TwoStateImageView(Context context) {
37         this(context, null);
38     }
39 
40     @Override
setEnabled(boolean enabled)41     public void setEnabled(boolean enabled) {
42         super.setEnabled(enabled);
43         if (mFilterEnabled) {
44             if (enabled) {
45                 setAlpha(1.0f);
46             } else {
47                 setAlpha(DISABLED_ALPHA);
48             }
49         }
50     }
51 
enableFilter(boolean enabled)52     public void enableFilter(boolean enabled) {
53         mFilterEnabled = enabled;
54     }
55 }
56