/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @flow * @format */ 'use strict'; const Animated = require('Animated'); const EdgeInsetsPropType = require('EdgeInsetsPropType'); const NativeMethodsMixin = require('NativeMethodsMixin'); const React = require('React'); const createReactClass = require('create-react-class'); const PropTypes = require('prop-types'); const Touchable = require('Touchable'); const TouchableWithoutFeedback = require('TouchableWithoutFeedback'); const ViewPropTypes = require('ViewPropTypes'); import type {EdgeInsetsProp} from 'EdgeInsetsPropType'; import type {Props as TouchableWithoutFeedbackProps} from 'TouchableWithoutFeedback'; import type {ViewStyleProp} from 'StyleSheet'; type Event = Object; type State = { animationID: ?number, scale: Animated.Value, }; const PRESS_RETENTION_OFFSET = {top: 20, left: 20, right: 20, bottom: 30}; type Props = $ReadOnly<{| ...TouchableWithoutFeedbackProps, onPressWithCompletion?: ?Function, onPressAnimationComplete?: ?Function, pressRetentionOffset?: ?EdgeInsetsProp, releaseVelocity?: ?number, releaseBounciness?: ?number, style?: ?ViewStyleProp, |}>; /** * Example of using the `TouchableMixin` to play well with other responder * locking views including `ScrollView`. `TouchableMixin` provides touchable * hooks (`this.touchableHandle*`) that we forward events to. In turn, * `TouchableMixin` expects us to implement some abstract methods to handle * interesting interactions such as `handleTouchablePress`. */ const TouchableBounce = ((createReactClass({ displayName: 'TouchableBounce', mixins: [Touchable.Mixin, NativeMethodsMixin], propTypes: { ...TouchableWithoutFeedback.propTypes, // The function passed takes a callback to start the animation which should // be run after this onPress handler is done. You can use this (for example) // to update UI before starting the animation. onPressWithCompletion: PropTypes.func, // the function passed is called after the animation is complete onPressAnimationComplete: PropTypes.func, /** * When the scroll view is disabled, this defines how far your touch may * move off of the button, before deactivating the button. Once deactivated, * try moving it back and you'll see that the button is once again * reactivated! Move it back and forth several times while the scroll view * is disabled. Ensure you pass in a constant to reduce memory allocations. */ pressRetentionOffset: EdgeInsetsPropType, releaseVelocity: PropTypes.number.isRequired, releaseBounciness: PropTypes.number.isRequired, /** * Style to apply to the container/underlay. Most commonly used to make sure * rounded corners match the wrapped component. */ style: ViewPropTypes.style, }, getDefaultProps: function() { return {releaseBounciness: 10, releaseVelocity: 10}; }, getInitialState: function(): State { return { ...this.touchableGetInitialState(), scale: new Animated.Value(1), }; }, bounceTo: function( value: number, velocity: number, bounciness: number, callback?: ?Function, ) { Animated.spring(this.state.scale, { toValue: value, velocity, bounciness, useNativeDriver: true, }).start(callback); }, /** * `Touchable.Mixin` self callbacks. The mixin will invoke these if they are * defined on your component. */ touchableHandleActivePressIn: function(e: Event) { this.bounceTo(0.93, 0.1, 0); this.props.onPressIn && this.props.onPressIn(e); }, touchableHandleActivePressOut: function(e: Event) { this.bounceTo(1, 0.4, 0); this.props.onPressOut && this.props.onPressOut(e); }, touchableHandlePress: function(e: Event) { const onPressWithCompletion = this.props.onPressWithCompletion; if (onPressWithCompletion) { onPressWithCompletion(() => { this.state.scale.setValue(0.93); this.bounceTo( 1, this.props.releaseVelocity, this.props.releaseBounciness, this.props.onPressAnimationComplete, ); }); return; } this.bounceTo( 1, this.props.releaseVelocity, this.props.releaseBounciness, this.props.onPressAnimationComplete, ); this.props.onPress && this.props.onPress(e); }, touchableGetPressRectOffset: function(): typeof PRESS_RETENTION_OFFSET { return this.props.pressRetentionOffset || PRESS_RETENTION_OFFSET; }, touchableGetHitSlop: function(): ?Object { return this.props.hitSlop; }, touchableGetHighlightDelayMS: function(): number { return 0; }, render: function(): React.Element { return ( {this.props.children} {Touchable.renderDebugView({ color: 'orange', hitSlop: this.props.hitSlop, })} ); }, }): any): React.ComponentType); module.exports = TouchableBounce;