77 lines
1.8 KiB
TypeScript
77 lines
1.8 KiB
TypeScript
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import type { PropsWithChildren, ReactElement } from 'react';
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import { StyleSheet, useColorScheme } from 'react-native';
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import Animated, {
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interpolate,
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useAnimatedRef,
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useAnimatedStyle,
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useScrollViewOffset,
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} from 'react-native-reanimated';
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import { ThemedView } from '@/components/ThemedView';
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const HEADER_HEIGHT = 250;
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type Props = PropsWithChildren<{
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headerImage: ReactElement;
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headerBackgroundColor: { dark: string; light: string };
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}>;
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export default function ParallaxScrollView({
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children,
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headerImage,
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headerBackgroundColor,
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}: Props) {
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const colorScheme = useColorScheme() ?? 'light';
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const scrollRef = useAnimatedRef<Animated.ScrollView>();
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const scrollOffset = useScrollViewOffset(scrollRef);
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const headerAnimatedStyle = useAnimatedStyle(() => {
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return {
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transform: [
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{
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translateY: interpolate(
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scrollOffset.value,
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[-HEADER_HEIGHT, 0, HEADER_HEIGHT],
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[-HEADER_HEIGHT / 2, 0, HEADER_HEIGHT * 0.75]
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),
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},
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{
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scale: interpolate(scrollOffset.value, [-HEADER_HEIGHT, 0, HEADER_HEIGHT], [2, 1, 1]),
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},
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],
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};
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});
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return (
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<ThemedView style={styles.container}>
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<Animated.ScrollView ref={scrollRef} scrollEventThrottle={16}>
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<Animated.View
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style={[
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styles.header,
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{ backgroundColor: headerBackgroundColor[colorScheme] },
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headerAnimatedStyle,
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]}>
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{headerImage}
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</Animated.View>
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<ThemedView style={styles.content}>{children}</ThemedView>
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</Animated.ScrollView>
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</ThemedView>
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);
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}
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const styles = StyleSheet.create({
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container: {
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flex: 1,
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},
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header: {
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height: 250,
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overflow: 'hidden',
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},
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content: {
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flex: 1,
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padding: 32,
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gap: 16,
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overflow: 'hidden',
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},
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});
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