| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui; |
| |
| import android.content.Context; |
| import android.graphics.Region; |
| import android.graphics.Region.Op; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewTreeObserver; |
| import android.view.ViewTreeObserver.InternalInsetsInfo; |
| import android.view.ViewTreeObserver.OnComputeInternalInsetsListener; |
| import android.widget.FrameLayout; |
| |
| /** |
| * Frame layout that will intercept the touches of children if they want to |
| */ |
| public class RegionInterceptingFrameLayout extends FrameLayout { |
| public RegionInterceptingFrameLayout(Context context) { |
| super(context); |
| } |
| |
| public RegionInterceptingFrameLayout(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public RegionInterceptingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| } |
| |
| public RegionInterceptingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr, |
| int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| getViewTreeObserver().addOnComputeInternalInsetsListener(mInsetsListener); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| getViewTreeObserver().removeOnComputeInternalInsetsListener(mInsetsListener); |
| } |
| |
| private final OnComputeInternalInsetsListener mInsetsListener = internalInsetsInfo -> { |
| internalInsetsInfo.setTouchableInsets(InternalInsetsInfo.TOUCHABLE_INSETS_REGION); |
| internalInsetsInfo.touchableRegion.setEmpty(); |
| for (int i = 0; i < getChildCount(); i++) { |
| View child = getChildAt(i); |
| if (!(child instanceof RegionInterceptableView)) { |
| continue; |
| } |
| RegionInterceptableView riv = (RegionInterceptableView) child; |
| if (!riv.shouldInterceptTouch()) { |
| continue; |
| } |
| Region unionRegion = riv.getInterceptRegion(); |
| if (unionRegion == null) { |
| continue; |
| } |
| |
| internalInsetsInfo.touchableRegion.op(riv.getInterceptRegion(), Op.UNION); |
| } |
| }; |
| |
| public interface RegionInterceptableView { |
| default public boolean shouldInterceptTouch() { |
| return false; |
| } |
| |
| public Region getInterceptRegion(); |
| } |
| } |