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d0d1712851
Summary: This adds support for sticky headers on Android. The implementation if based primarily on the iOS one (https://github.com/facebook/react-native/blob/master/React/Views/RCTScrollView.m#L272) and adds some stuff that was missing to be able to handle z-index, view clipping, view hierarchy optimization and touch handling properly. Some notable changes: - Add `ChildDrawingOrderDelegate` interface to allow changing the `ViewGroup` drawing order using `ViewGroup#getChildDrawingOrder`. This is used to change the content view drawing order to make sure headers are drawn over the other cells. Right now I'm only reversing the drawing order as drawing only the header views last added a lot of complexity especially because of view clipping and I don't think it should cause issues. - Add `collapsableChildren` prop that works like `collapsable` but applies to every child of the view. This is needed to be able to reference sticky headers by their indices otherwise some subviews can get optimized out and break indexes. Closes https://github.com/facebook/react-native/pull/9456 Differential Revision: D3827366 Pulled By: fred2028 fbshipit-source-id: d346068734c5b987518794ab23e13914ed13b5c4
25 lines
973 B
Java
25 lines
973 B
Java
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package com.facebook.react.uimanager;
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/**
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* This interface should be implemented be native ViewGroup subclasses that can represent more
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* than a single react node. In that case, virtual and non-virtual (mapping to a View) elements
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* can overlap, and TouchTargetHelper may incorrectly dispatch touch event to a wrong element
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* because it priorities children over parents.
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*/
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public interface ReactCompoundViewGroup extends ReactCompoundView {
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/**
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* Returns true if react node responsible for the touch even is flattened into this ViewGroup.
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* Use reactTagForTouch() to get its tag.
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*/
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boolean interceptsTouchEvent(float touchX, float touchY);
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}
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