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.wallpaperpicker; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.Button; 22 23 /** 24 * A Button which becomes translucent when it is disabled 25 */ 26 public class AlphaDisableableButton extends Button { 27 public static float DISABLED_ALPHA_VALUE = 0.4f; 28 public AlphaDisableableButton(Context context) { 29 this(context, null); 30 } 31 32 public AlphaDisableableButton(Context context, AttributeSet attrs) { 33 this(context, attrs, 0); 34 } 35 36 public AlphaDisableableButton(Context context, AttributeSet attrs, int defStyleAttr) { 37 super(context, attrs, defStyleAttr); 38 setLayerType(LAYER_TYPE_HARDWARE, null); 39 } 40 41 @Override 42 public void setEnabled(boolean enabled) { 43 super.setEnabled(enabled); 44 if(enabled) { 45 setAlpha(1.0f); 46 } else { 47 setAlpha(DISABLED_ALPHA_VALUE); 48 } 49 } 50 } 51
