mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Denis Koroskin
aae521f57e
Summary: In React, ReactCompoundView is supposed to be implemented by a View, but there is no ViewGroup counterpart that allows mixing virual nodes and non-virtual ones (Views) in the same parent. This is needed because TouchTargetHelper always considers child Views when looking for touch target before falling back to View/ReactCompoundView. This works incorrectly for e.g. layout-only / flattened nodes. ReactCompoundViewGroup allow intercepting touch event before it is dispatched to its children. In that sense, ReactCompoundView.reactTagForTouch() is like View.onTouchEvent() whereas ReactCompoundViewGroup.interceptsTouchEvent() is like ViewGroup.onInterceptTouchEvent(). Differential Revision: D3018028 fb-gh-sync-id: d2c70a55afb9ce9823275e7483d72e0ebedf52e4 shipit-source-id: d2c70a55afb9ce9823275e7483d72e0ebedf52e4
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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