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.settings.location; 18 19 import android.content.Context; 20 import android.graphics.drawable.Drawable; 21 import android.preference.Preference; 22 import android.util.AttributeSet; 23 24 /** 25 * A preference item that can dim the icon when it's disabled, either directly or because its parent 26 * is disabled. 27 */ 28 public class DimmableIconPreference extends Preference { 29 private static final int ICON_ALPHA_ENABLED = 255; 30 private static final int ICON_ALPHA_DISABLED = 102; 31 32 public DimmableIconPreference(Context context, AttributeSet attrs, int defStyle) { 33 super(context, attrs, defStyle); 34 } 35 36 public DimmableIconPreference(Context context, AttributeSet attrs) { 37 super(context, attrs); 38 } 39 40 public DimmableIconPreference(Context context) { 41 super(context); 42 } 43 44 private void dimIcon(boolean dimmed) { 45 Drawable icon = getIcon(); 46 if (icon != null) { 47 icon.mutate().setAlpha(dimmed ? ICON_ALPHA_DISABLED : ICON_ALPHA_ENABLED); 48 setIcon(icon); 49 } 50 } 51 52 @Override 53 public void onParentChanged(Preference parent, boolean disableChild) { 54 dimIcon(disableChild); 55 super.onParentChanged(parent, disableChild); 56 } 57 58 @Override 59 public void setEnabled(boolean enabled) { 60 dimIcon(!enabled); 61 super.setEnabled(enabled); 62 } 63 } 64
