66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
import { Animated, Easing, StyleSheet, View } from 'react-native';
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import GenericTouchable, { TOUCHABLE_STATE } from './GenericTouchable';
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import React, { Component } from 'react';
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import PropTypes from 'prop-types';
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/**
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* TouchableOpacity bases on timing animation which has been used in RN's core
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*/
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export default class TouchableOpacity extends Component {
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static defaultProps = {
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...GenericTouchable.defaultProps,
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activeOpacity: 0.2,
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};
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static propTypes = {
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...GenericTouchable.publicPropTypes,
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style: PropTypes.any,
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activeOpacity: PropTypes.number,
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};
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// opacity is 1 one by default but could be overwritten
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getChildStyleOpacityWithDefault = () => {
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const childStyle = StyleSheet.flatten(this.props.style) || {};
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return childStyle.opacity == null ? 1 : childStyle.opacity;
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};
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opacity = new Animated.Value(this.getChildStyleOpacityWithDefault());
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setOpacityTo = (value, duration) => {
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Animated.timing(this.opacity, {
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toValue: value,
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duration: duration,
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easing: Easing.inOut(Easing.quad),
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useNativeDriver: true,
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}).start();
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};
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onStateChange = (from, to) => {
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if (to === TOUCHABLE_STATE.BEGAN) {
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this.setOpacityTo(this.props.activeOpacity, 0);
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} else if (
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to === TOUCHABLE_STATE.UNDETERMINED ||
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to === TOUCHABLE_STATE.MOVED_OUTSIDE
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) {
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this.setOpacityTo(this.getChildStyleOpacityWithDefault(), 150);
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}
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};
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render() {
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const { style = {}, ...rest } = this.props;
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return (
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<GenericTouchable
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{...rest}
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style={[
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style,
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{
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opacity: this.opacity,
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},
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]}
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onStateChange={this.onStateChange}>
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{this.props.children ? this.props.children : <View />}
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</GenericTouchable>
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);
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}
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}
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