48 lines
1.0 KiB
JavaScript
48 lines
1.0 KiB
JavaScript
/**
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* Copyright 2004-present Facebook. All Rights Reserved.
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*
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* @providesModule NavigationAbstractPanResponder
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* @flow
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*/
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'use strict';
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const PanResponder = require('PanResponder');
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const invariant = require('invariant');
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const EmptyPanHandlers = {
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onMoveShouldSetPanResponder: null,
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onPanResponderGrant: null,
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onPanResponderMove: null,
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onPanResponderRelease: null,
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onPanResponderTerminate: null,
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};
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/**
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* Abstract class that defines the common interface of PanResponder that handles
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* the gesture actions.
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*/
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class NavigationAbstractPanResponder {
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panHandlers: Object;
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constructor() {
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const config = {};
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Object.keys(EmptyPanHandlers).forEach(name => {
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const fn: any = (this: any)[name];
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invariant(
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typeof fn === 'function',
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'subclass of `NavigationAbstractPanResponder` must implement method %s',
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name
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);
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config[name] = fn.bind(this);
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}, this);
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this.panHandlers = PanResponder.create(config).panHandlers;
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}
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}
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module.exports = NavigationAbstractPanResponder;
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