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.printspooler.widget; 18 19 import static android.view.accessibility.Flags.triStateChecked; 20 21 import android.content.Context; 22 import android.util.AttributeSet; 23 import android.view.accessibility.AccessibilityEvent; 24 import android.view.accessibility.AccessibilityNodeInfo; 25 import android.widget.CompoundButton; 26 import android.widget.LinearLayout; 27 28 /** 29 * This class represents the frame of page in the print preview list 30 * that contains the page and a footer. 31 */ 32 public final class PreviewPageFrame extends LinearLayout { PreviewPageFrame(Context context, AttributeSet attrs)33 public PreviewPageFrame(Context context, AttributeSet attrs) { 34 super(context, attrs); 35 } 36 37 @Override getAccessibilityClassName()38 public CharSequence getAccessibilityClassName() { 39 return CompoundButton.class.getName(); 40 } 41 42 @Override performClick()43 public boolean performClick() { 44 final boolean result = super.performClick(); 45 // This widget is incorrectly using the notion of "selection" 46 // to represent checked state. We can't send this event in 47 // setSelected() because setSelected() is called when this widget 48 // is not attached. 49 if (triStateChecked()) { 50 notifyViewAccessibilityStateChangedIfNeeded( 51 AccessibilityEvent.CONTENT_CHANGE_TYPE_CHECKED); 52 } 53 return result; 54 } 55 56 @Override onInitializeAccessibilityEvent(AccessibilityEvent event)57 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 58 super.onInitializeAccessibilityEvent(event); 59 event.setChecked(isSelected()); 60 } 61 62 @Override onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)63 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 64 super.onInitializeAccessibilityNodeInfo(info); 65 info.setSelected(false); 66 info.setCheckable(true); 67 if (triStateChecked()) { 68 info.setChecked(isSelected() ? AccessibilityNodeInfo.CHECKED_STATE_TRUE : 69 AccessibilityNodeInfo.CHECKED_STATE_FALSE); 70 } else { 71 info.setChecked(isSelected()); 72 } 73 } 74 } 75