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 android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.ImageView; 22 23 /** 24 * A @{code ImageView} which change the opacity of the icon if disabled. 25 */ 26 public class TwoStateImageView extends ImageView { 27 private static final int ENABLED_ALPHA = 255; 28 private static final int DISABLED_ALPHA = (int) (255 * 0.4); 29 private boolean mFilterEnabled = true; 30 TwoStateImageView(Context context, AttributeSet attrs)31 public TwoStateImageView(Context context, AttributeSet attrs) { 32 super(context, attrs); 33 } 34 TwoStateImageView(Context context)35 public TwoStateImageView(Context context) { 36 this(context, null); 37 } 38 39 @SuppressWarnings("deprecation") 40 @Override setEnabled(boolean enabled)41 public void setEnabled(boolean enabled) { 42 super.setEnabled(enabled); 43 if (mFilterEnabled) { 44 if (enabled) { 45 setAlpha(ENABLED_ALPHA); 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