react-native/RNTester/js/AnimatedGratuitousApp/AnExSet.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

var React = require('react');
var ReactNative = require('react-native');
var {Animated, PanResponder, StyleSheet, Text, View} = ReactNative;

var AnExBobble = require('./AnExBobble');
var AnExChained = require('./AnExChained');
var AnExScroll = require('./AnExScroll');
var AnExTilt = require('./AnExTilt');

class AnExSet extends React.Component<Object, any> {
  constructor(props: Object) {
    super(props);
    function randColor() {
      var colors = [0, 1, 2].map(() => Math.floor(Math.random() * 150 + 100));
      return 'rgb(' + colors.join(',') + ')';
    }
    this.state = {
      closeColor: randColor(),
      openColor: randColor(),
    };
  }
  render(): React.Node {
    var backgroundColor = this.props.openVal
      ? this.props.openVal.interpolate({
          inputRange: [0, 1],
          outputRange: [
            this.state.closeColor, // interpolates color strings
            this.state.openColor,
          ],
        })
      : this.state.closeColor;
    var panelWidth =
      (this.props.containerLayout && this.props.containerLayout.width) || 320;
    return (
      <View style={styles.container}>
        <Animated.View
          style={[styles.header, {backgroundColor}]}
          {...this.state.dismissResponder.panHandlers}>
          <Text style={[styles.text, styles.headerText]}>{this.props.id}</Text>
        </Animated.View>
        {this.props.isActive && (
          <View style={styles.stream}>
            <View style={styles.card}>
              <Text style={styles.text}>July 2nd</Text>
              <AnExTilt isActive={this.props.isActive} />
              <AnExBobble />
            </View>
            <AnExScroll panelWidth={panelWidth} />
            <AnExChained />
          </View>
        )}
      </View>
    );
  }

  UNSAFE_componentWillMount() {
    this.state.dismissY = new Animated.Value(0);
    this.state.dismissResponder = PanResponder.create({
      onStartShouldSetPanResponder: () => this.props.isActive,
      onPanResponderGrant: () => {
        Animated.spring(this.props.openVal, {
          // Animated value passed in.
          toValue: this.state.dismissY.interpolate({
            // Track dismiss gesture
            inputRange: [0, 300], // and interpolate pixel distance
            outputRange: [1, 0], // to a fraction.
          }),
          useNativeDriver: true,
        }).start();
      },
      onPanResponderMove: Animated.event(
        [null, {dy: this.state.dismissY}], // track pan gesture
        {useNativeDriver: true},
      ),
      onPanResponderRelease: (e, gestureState) => {
        if (gestureState.dy > 100) {
          this.props.onDismiss(gestureState.vy); // delegates dismiss action to parent
        } else {
          Animated.spring(this.props.openVal, {
            toValue: 1, // animate back open if released early
            useNativeDriver: true,
          }).start();
        }
      },
    });
  }
}

var styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  header: {
    alignItems: 'center',
    paddingTop: 18,
    height: 90,
  },
  stream: {
    flex: 1,
    backgroundColor: 'rgb(230, 230, 230)',
  },
  card: {
    margin: 8,
    padding: 8,
    borderRadius: 6,
    backgroundColor: 'white',
    shadowRadius: 2,
    shadowColor: 'black',
    shadowOpacity: 0.2,
    shadowOffset: {height: 0.5},
  },
  text: {
    padding: 4,
    paddingBottom: 10,
    fontWeight: 'bold',
    fontSize: 18,
    backgroundColor: 'transparent',
  },
  headerText: {
    fontSize: 25,
    color: 'white',
    shadowRadius: 3,
    shadowColor: 'black',
    shadowOpacity: 1,
    shadowOffset: {height: 1},
  },
});

module.exports = AnExSet;