65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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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#include "ScrollViewEventEmitter.h"
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namespace facebook {
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namespace react {
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void ScrollViewEventEmitter::onScroll(const ScrollViewMetrics &scrollViewMetrics) const {
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dispatchScrollViewEvent("scroll", scrollViewMetrics);
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}
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void ScrollViewEventEmitter::onScrollBeginDrag(const ScrollViewMetrics &scrollViewMetrics) const {
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dispatchScrollViewEvent("scrollBeginDrag", scrollViewMetrics);
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}
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void ScrollViewEventEmitter::onScrollEndDrag(const ScrollViewMetrics &scrollViewMetrics) const {
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dispatchScrollViewEvent("scrollEndDrag", scrollViewMetrics);
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}
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void ScrollViewEventEmitter::onMomentumScrollBegin(const ScrollViewMetrics &scrollViewMetrics) const {
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dispatchScrollViewEvent("momentumScrollBegin", scrollViewMetrics);
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}
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void ScrollViewEventEmitter::onMomentumScrollEnd(const ScrollViewMetrics &scrollViewMetrics) const {
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dispatchScrollViewEvent("momentumScrollEnd", scrollViewMetrics);
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}
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void ScrollViewEventEmitter::dispatchScrollViewEvent(const std::string &name, const ScrollViewMetrics &scrollViewMetrics, const folly::dynamic &payload) const {
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folly::dynamic compoundPayload = folly::dynamic::object();
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compoundPayload["contentOffset"] = folly::dynamic::object
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("x", scrollViewMetrics.contentOffset.x)
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("y", scrollViewMetrics.contentOffset.y);
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compoundPayload["contentInset"] = folly::dynamic::object
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("top", scrollViewMetrics.contentInset.top)
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("left", scrollViewMetrics.contentInset.left)
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("bottom", scrollViewMetrics.contentInset.bottom)
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("right", scrollViewMetrics.contentInset.right);
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compoundPayload["contentSize"] = folly::dynamic::object
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("width", scrollViewMetrics.contentSize.width)
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("height", scrollViewMetrics.contentSize.height);
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compoundPayload["layoutMeasurement"] = folly::dynamic::object
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("width", scrollViewMetrics.containerSize.width)
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("height", scrollViewMetrics.containerSize.height);
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compoundPayload["zoomScale"] = scrollViewMetrics.zoomScale;
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if (!payload.isNull()) {
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compoundPayload.merge_patch(payload);
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}
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dispatchEvent(name, compoundPayload);
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}
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} // namespace react
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} // namespace facebook
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