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@andigu
Last active February 26, 2023 17:59
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Advanced demo for panresponder
import React, {Component} from "react";
import {Animated, Dimensions, Easing, PanResponder, StyleSheet, View} from "react-native";
import {Card} from "./Card";
const {width: screenWidth, height: screenHeight} = Dimensions.get("window");
export class Sliding extends Component {
bottomPadding = 10;
data = new Array(20).fill({
name: "John Smith",
title: "Marketing Head",
address: "Address",
email: "johnsmith@gmail.com"
});
colors = ["#ff5252", "#e040fb", "#7c4dff", "#448aff", "#64ffda", "#ff6e40"];
translateY = new Animated.Value(-this.bottomPadding);
bottoms = this.data.map((_, i) =>
Animated.add(Animated.multiply(this.translateY, -1), i * screenHeight / 8).interpolate({
inputRange: [0, screenHeight - 200, screenHeight - 199],
outputRange: [0, screenHeight - 200, screenHeight - 200]
}));
panresponder = PanResponder.create({
onMoveShouldSetResponderCapture: () => true,
onMoveShouldSetPanResponderCapture: () => true,
onPanResponderMove: Animated.event([null, {dy: this.translateY}]),
onPanResponderRelease: (_, {vy}) => {
this.translateY.extractOffset();
Animated.timing(this.translateY, {
toValue: vy * 1000,
duration: 1000,
easing: Easing.poly(0.5)
}).start(() => {
const yOffset = this.bottoms.reduce((prevVal, x) =>
Math.abs(x.__getValue()) < Math.abs(prevVal) ? x.__getValue() : prevVal, Infinity);
this.translateY.extractOffset();
Animated.spring(this.translateY, {
toValue: yOffset - this.bottomPadding,
duration: 100,
friction: 5
}).start(this.translateY.extractOffset.bind(this));
})
}
});
render() {
return <View
style={{width: screenWidth, height: screenHeight, backgroundColor: "black"}} {...this.panresponder.panHandlers}>
{this.data.slice().reverse().map((x, index) => {
const i = this.data.length - index - 1;
const bottom = this.bottoms[i];
const pullDown = bottom.interpolate({
inputRange: [this.bottomPadding - 1, this.bottomPadding, this.bottomPadding + 1],
outputRange: [-4, 0, 0],
extrapolateLeft: "extend"
});
const scale = Animated.multiply(Animated.add(Animated.divide(bottom, screenHeight), -1), -1).interpolate({
inputRange: [0.1, 1, 1.1],
outputRange: [0.1, 1, 1],
extrapolate: "clamp"
});
const perspective = new Animated.Value(0);
perspective.__getValue = () => {
const x = bottom.__getValue();
return x > 0 ? 13 * Math.pow(x, 0.6) : x;
};
const opacity = bottom.interpolate({
inputRange: [this.bottomPadding, screenHeight - 200],
outputRange: [0, 0.3],
extrapolate: "clamp"
});
return <Animated.View key={i}
style={{
position: "absolute",
transform: [{scale}],
bottom: Animated.add(perspective, pullDown)
}}>
<Card color={this.colors[i % this.colors.length]} data={x}/>
<Animated.View style={{
...StyleSheet.absoluteFillObject,
width: "100%",
height: "100%",
backgroundColor: "#4c4c4c",
opacity
}}/>
</Animated.View>
}
)}
</View>
}
}
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