1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.settingslib.notification; 16 17 import android.content.Context; 18 import android.util.AttributeSet; 19 import android.view.View; 20 import android.view.ViewGroup; 21 import android.widget.LinearLayout; 22 23 /** 24 * Specialized layout for zen mode that allows the radio buttons to reside within 25 * a RadioGroup, but also makes sure that all the heights of the radio buttons align 26 * with the corresponding content in the second child of this view. 27 */ 28 public class ZenRadioLayout extends LinearLayout { 29 30 public ZenRadioLayout(Context context, AttributeSet attrs) { 31 super(context, attrs); 32 } 33 34 /** 35 * Run 2 measurement passes, 1 that figures out the size of the content, and another 36 * that sets the size of the radio buttons to the heights of the corresponding content. 37 */ 38 @Override 39 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 40 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 41 42 ViewGroup radioGroup = (ViewGroup) getChildAt(0); 43 ViewGroup radioContent = (ViewGroup) getChildAt(1); 44 int size = radioGroup.getChildCount(); 45 if (size != radioContent.getChildCount()) { 46 throw new IllegalStateException("Expected matching children"); 47 } 48 boolean hasChanges = false; 49 View lastView = null; 50 for (int i = 0; i < size; i++) { 51 View radio = radioGroup.getChildAt(i); 52 View content = radioContent.getChildAt(i); 53 if (lastView != null) { 54 radio.setAccessibilityTraversalAfter(lastView.getId()); 55 } 56 View contentClick = findFirstClickable(content); 57 if (contentClick != null) contentClick.setAccessibilityTraversalAfter(radio.getId()); 58 lastView = findLastClickable(content); 59 if (radio.getLayoutParams().height != content.getMeasuredHeight()) { 60 hasChanges = true; 61 radio.getLayoutParams().height = content.getMeasuredHeight(); 62 } 63 } 64 // Measure again if any heights changed. 65 if (hasChanges) { 66 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 67 } 68 } 69 70 private View findFirstClickable(View content) { 71 if (content.isClickable()) return content; 72 if (content instanceof ViewGroup) { 73 ViewGroup group = (ViewGroup) content; 74 for (int i = 0; i < group.getChildCount(); i++) { 75 View v = findFirstClickable(group.getChildAt(i)); 76 if (v != null) return v; 77 } 78 } 79 return null; 80 } 81 82 private View findLastClickable(View content) { 83 if (content.isClickable()) return content; 84 if (content instanceof ViewGroup) { 85 ViewGroup group = (ViewGroup) content; 86 for (int i = group.getChildCount() - 1; i >= 0; i--) { 87 View v = findLastClickable(group.getChildAt(i)); 88 if (v != null) return v; 89 } 90 } 91 return null; 92 } 93 } 94
