mirror of
https://github.com/zhigang1992/react-native.git
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9a64755a18
Summary: That's bummer that we have to do it, but it's actually reasonable. Files in `core` and `events` depend on each other creating circular dependencies and other similar hard problem. Reviewed By: mdvacca Differential Revision: D14195022 fbshipit-source-id: 96a44ae28631cc9ccd7d7de72a94526f9e0dd12a
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <memory>
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#include <folly/dynamic.h>
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#include <react/components/view/ViewEventEmitter.h>
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#include <react/core/EventEmitter.h>
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#include <react/graphics/Geometry.h>
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namespace facebook {
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namespace react {
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class ScrollViewMetrics {
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public:
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Size contentSize;
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Point contentOffset;
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EdgeInsets contentInset;
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Size containerSize;
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Float zoomScale;
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};
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class ScrollViewEventEmitter;
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using SharedScrollViewEventEmitter =
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std::shared_ptr<const ScrollViewEventEmitter>;
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class ScrollViewEventEmitter : public ViewEventEmitter {
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public:
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using ViewEventEmitter::ViewEventEmitter;
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void onScroll(const ScrollViewMetrics &scrollViewMetrics) const;
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void onScrollBeginDrag(const ScrollViewMetrics &scrollViewMetrics) const;
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void onScrollEndDrag(const ScrollViewMetrics &scrollViewMetrics) const;
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void onMomentumScrollBegin(const ScrollViewMetrics &scrollViewMetrics) const;
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void onMomentumScrollEnd(const ScrollViewMetrics &scrollViewMetrics) const;
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private:
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void dispatchScrollViewEvent(
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const std::string &name,
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const ScrollViewMetrics &scrollViewMetrics,
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EventPriority priority = EventPriority::AsynchronousBatched) const;
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};
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} // namespace react
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} // namespace facebook
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