mirror of
https://github.com/zoriya/react-native-web.git
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Reorganize monorepo structure
* Move all config files to './configs' * Simplify './scripts' folder.
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/**
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* @flow
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*/
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import React from 'react';
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import { PanResponder, StyleSheet, View } from 'react-native';
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import Example from '../../shared/example';
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const CIRCLE_SIZE = 80;
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class DraggableCircle extends React.PureComponent {
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_panResponder = {};
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_previousLeft = 0;
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_previousTop = 0;
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_circleStyles = {};
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circle = null;
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constructor() {
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super();
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this._panResponder = PanResponder.create({
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onStartShouldSetPanResponder: this._handleStartShouldSetPanResponder,
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onMoveShouldSetPanResponder: this._handleMoveShouldSetPanResponder,
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onPanResponderGrant: this._handlePanResponderGrant,
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onPanResponderMove: this._handlePanResponderMove,
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onPanResponderRelease: this._handlePanResponderEnd,
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onPanResponderTerminate: this._handlePanResponderEnd
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});
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this._previousLeft = 20;
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this._previousTop = 84;
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this._circleStyles = {
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style: {
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left: this._previousLeft,
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top: this._previousTop,
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backgroundColor: 'green'
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}
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};
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}
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componentDidMount() {
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this._updateNativeStyles();
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}
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render() {
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return (
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<View style={styles.container}>
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<View ref={this._setCircleRef} style={styles.circle} {...this._panResponder.panHandlers} />
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</View>
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);
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}
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_setCircleRef = (circle) => {
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this.circle = circle;
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};
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_highlight() {
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this._circleStyles.style.backgroundColor = 'blue';
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this._updateNativeStyles();
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}
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_unHighlight() {
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this._circleStyles.style.backgroundColor = 'green';
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this._updateNativeStyles();
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}
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_updateNativeStyles() {
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this.circle && this.circle.setNativeProps(this._circleStyles);
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}
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_handleStartShouldSetPanResponder = (e: Object, gestureState: Object): boolean => {
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// Should we become active when the user presses down on the circle?
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return true;
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};
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_handleMoveShouldSetPanResponder = (e: Object, gestureState: Object): boolean => {
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// Should we become active when the user moves a touch over the circle?
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return true;
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};
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_handlePanResponderGrant = (e: Object, gestureState: Object) => {
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this._highlight();
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};
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_handlePanResponderMove = (e: Object, gestureState: Object) => {
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this._circleStyles.style.left = this._previousLeft + gestureState.dx;
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this._circleStyles.style.top = this._previousTop + gestureState.dy;
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this._updateNativeStyles();
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};
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_handlePanResponderEnd = (e: Object, gestureState: Object) => {
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this._unHighlight();
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this._previousLeft += gestureState.dx;
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this._previousTop += gestureState.dy;
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};
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}
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class LocationXY extends React.Component {
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constructor() {
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super();
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this.state = { translateX: 0 };
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this.panResponder = PanResponder.create({
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onStartShouldSetPanResponder: () => true,
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onStartShouldSetPanResponderCapture: () => true,
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onPanResponderMove: this._handlePanResponderMove,
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onPanResponderTerminationRequest: () => true
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});
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}
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_handlePanResponderMove = (e, gestureState) => {
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console.log(e.nativeEvent.locationX, e.nativeEvent.locationY);
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this.setState((state) => ({
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...state,
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translateX: gestureState.dx
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}));
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};
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render() {
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const transform = { transform: [{ translateX: this.state.translateX }] };
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return (
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<View style={styles.box}>
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<View style={styles.outer} {...this.panResponder.panHandlers}>
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<View style={[styles.inner, transform]} />
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</View>
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</View>
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);
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}
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}
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const styles = StyleSheet.create({
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circle: {
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width: CIRCLE_SIZE,
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height: CIRCLE_SIZE,
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borderRadius: CIRCLE_SIZE / 2,
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position: 'absolute',
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left: 0,
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top: 0,
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touchAction: 'none'
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},
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container: {
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alignSelf: 'stretch',
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minHeight: 300,
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paddingTop: 64
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},
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box: {
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justifyContent: 'center',
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alignItems: 'center'
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},
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outer: {
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width: 250,
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height: 50,
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backgroundColor: 'skyblue'
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},
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inner: {
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width: 30,
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height: 30,
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backgroundColor: 'lightblue'
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}
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});
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export default function PanResponderPage() {
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return (
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<Example title="PanResponder">
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<DraggableCircle />
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<LocationXY />
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</Example>
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);
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}
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