Evan Laird | b0506ca | 2018-03-15 10:34:31 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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.systemui; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.graphics.Region; |
| 21 | import android.graphics.Region.Op; |
| 22 | import android.util.AttributeSet; |
| 23 | import android.view.View; |
Evan Laird | b0506ca | 2018-03-15 10:34:31 -0400 | [diff] [blame] | 24 | import android.view.ViewTreeObserver.InternalInsetsInfo; |
| 25 | import android.view.ViewTreeObserver.OnComputeInternalInsetsListener; |
| 26 | import android.widget.FrameLayout; |
| 27 | |
| 28 | /** |
| 29 | * Frame layout that will intercept the touches of children if they want to |
| 30 | */ |
| 31 | public class RegionInterceptingFrameLayout extends FrameLayout { |
| 32 | public RegionInterceptingFrameLayout(Context context) { |
| 33 | super(context); |
| 34 | } |
| 35 | |
| 36 | public RegionInterceptingFrameLayout(Context context, AttributeSet attrs) { |
| 37 | super(context, attrs); |
| 38 | } |
| 39 | |
| 40 | public RegionInterceptingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) { |
| 41 | super(context, attrs, defStyleAttr); |
| 42 | } |
| 43 | |
| 44 | public RegionInterceptingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr, |
| 45 | int defStyleRes) { |
| 46 | super(context, attrs, defStyleAttr, defStyleRes); |
| 47 | } |
| 48 | |
| 49 | @Override |
| 50 | protected void onAttachedToWindow() { |
| 51 | super.onAttachedToWindow(); |
| 52 | getViewTreeObserver().addOnComputeInternalInsetsListener(mInsetsListener); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | protected void onDetachedFromWindow() { |
| 57 | super.onDetachedFromWindow(); |
| 58 | getViewTreeObserver().removeOnComputeInternalInsetsListener(mInsetsListener); |
| 59 | } |
| 60 | |
| 61 | private final OnComputeInternalInsetsListener mInsetsListener = internalInsetsInfo -> { |
| 62 | internalInsetsInfo.setTouchableInsets(InternalInsetsInfo.TOUCHABLE_INSETS_REGION); |
| 63 | internalInsetsInfo.touchableRegion.setEmpty(); |
| 64 | for (int i = 0; i < getChildCount(); i++) { |
| 65 | View child = getChildAt(i); |
| 66 | if (!(child instanceof RegionInterceptableView)) { |
| 67 | continue; |
| 68 | } |
| 69 | RegionInterceptableView riv = (RegionInterceptableView) child; |
| 70 | if (!riv.shouldInterceptTouch()) { |
| 71 | continue; |
| 72 | } |
| 73 | Region unionRegion = riv.getInterceptRegion(); |
| 74 | if (unionRegion == null) { |
| 75 | continue; |
| 76 | } |
| 77 | |
Issei Suzuki | 43190bd | 2018-08-20 17:28:41 +0200 | [diff] [blame] | 78 | internalInsetsInfo.touchableRegion.op(unionRegion, Op.UNION); |
Evan Laird | b0506ca | 2018-03-15 10:34:31 -0400 | [diff] [blame] | 79 | } |
| 80 | }; |
| 81 | |
| 82 | public interface RegionInterceptableView { |
| 83 | default public boolean shouldInterceptTouch() { |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | public Region getInterceptRegion(); |
| 88 | } |
| 89 | } |