1 /* 2 * Copyright (C) 2021 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.settingslib.widget; 18 19 import android.content.Context; 20 import android.graphics.Rect; 21 import android.util.AttributeSet; 22 import android.view.TouchDelegate; 23 import android.view.View; 24 import android.widget.LinearLayout; 25 26 import androidx.annotation.Nullable; 27 28 import com.android.settingslib.widget.preference.banner.R; 29 30 /** 31 * The view providing {@link BannerMessagePreference}. 32 * 33 * <p>Callers should not instantiate this view directly but rather through adding a 34 * {@link BannerMessagePreference} to a {@code PreferenceScreen}. 35 */ 36 public class BannerMessageView extends LinearLayout { 37 private Rect mTouchTargetForDismissButton; 38 BannerMessageView(Context context)39 public BannerMessageView(Context context) { 40 super(context); 41 } 42 BannerMessageView(Context context, @Nullable AttributeSet attrs)43 public BannerMessageView(Context context, 44 @Nullable AttributeSet attrs) { 45 super(context, attrs); 46 } 47 BannerMessageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr)48 public BannerMessageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 49 super(context, attrs, defStyleAttr); 50 } 51 BannerMessageView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)52 public BannerMessageView(Context context, AttributeSet attrs, int defStyleAttr, 53 int defStyleRes) { 54 super(context, attrs, defStyleAttr, defStyleRes); 55 } 56 57 @Override onLayout(boolean changed, int l, int t, int r, int b)58 protected void onLayout(boolean changed, int l, int t, int r, int b) { 59 super.onLayout(changed, l, t, r, b); 60 setupIncreaseTouchTargetForDismissButton(); 61 } 62 setupIncreaseTouchTargetForDismissButton()63 private void setupIncreaseTouchTargetForDismissButton() { 64 if (mTouchTargetForDismissButton != null) { 65 // Already set up 66 return; 67 } 68 69 // The dismiss button is in the 'top row' RelativeLayout for positioning, but this element 70 // does not have enough space to provide large touch targets. We therefore set the top 71 // target on this view. 72 View topRow = findViewById(R.id.top_row); 73 View dismissButton = findViewById(R.id.banner_dismiss_btn); 74 if (topRow == null || dismissButton == null || dismissButton.getVisibility() != VISIBLE) { 75 return; 76 } 77 78 int minimum = 79 getResources() 80 .getDimensionPixelSize(com.android.settingslib.widget.theme.R.dimen.settingslib_preferred_minimum_touch_target); 81 int width = dismissButton.getWidth(); 82 int height = dismissButton.getHeight(); 83 int widthIncrease = width < minimum ? minimum - width : 0; 84 int heightIncrease = height < minimum ? minimum - height : 0; 85 86 // Compute the hit rect of dismissButton within the local co-orindate reference of this view 87 // (rather than it's direct parent topRow). 88 Rect hitRectWithinTopRow = new Rect(); 89 dismissButton.getHitRect(hitRectWithinTopRow); 90 Rect hitRectOfTopRowWithinThis = new Rect(); 91 topRow.getHitRect(hitRectOfTopRowWithinThis); 92 mTouchTargetForDismissButton = new Rect(); 93 mTouchTargetForDismissButton.left = 94 hitRectOfTopRowWithinThis.left + hitRectWithinTopRow.left; 95 mTouchTargetForDismissButton.right = 96 hitRectOfTopRowWithinThis.left + hitRectWithinTopRow.right; 97 mTouchTargetForDismissButton.top = 98 hitRectOfTopRowWithinThis.top + hitRectWithinTopRow.top; 99 mTouchTargetForDismissButton.bottom = 100 hitRectOfTopRowWithinThis.top + hitRectWithinTopRow.bottom; 101 102 // Adjust the touch target rect to apply the necessary increase in width and height. 103 mTouchTargetForDismissButton.left -= 104 widthIncrease % 2 == 1 ? (widthIncrease / 2) + 1 : widthIncrease / 2; 105 mTouchTargetForDismissButton.top -= 106 heightIncrease % 2 == 1 ? (heightIncrease / 2) + 1 : heightIncrease / 2; 107 mTouchTargetForDismissButton.right += widthIncrease / 2; 108 mTouchTargetForDismissButton.bottom += heightIncrease / 2; 109 110 setTouchDelegate(new TouchDelegate(mTouchTargetForDismissButton, dismissButton)); 111 } 112 113 } 114