1 /* 2 * Copyright (C) 2010 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.gallery3d.photoeditor; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.ImageButton; 22 23 /** 24 * Image buttons used in Action-bar and Effects-menu that can be grayed out when set disabled. 25 * (Text buttons are automatically grayed out when disabled; however, image buttons are not.) 26 */ 27 public class ImageActionButton extends ImageButton { 28 29 private static final float ENABLED_ALPHA = 1; 30 private static final float DISABLED_ALPHA = 0.28f; 31 32 public ImageActionButton(Context context, AttributeSet attrs) { 33 super(context, attrs); 34 } 35 36 @Override 37 public void setEnabled(boolean enabled) { 38 super.setEnabled(enabled); 39 setAlpha(enabled ? ENABLED_ALPHA : DISABLED_ALPHA); 40 } 41 } 42
