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