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feat: allow dynamic snap points (#81)
* chore: updated normalized snap points implementation * chore: reverse snap points transitions * chore: updated content wrapper * chore: added bottom sheet container * chore: updated bottom sheet to handle dynamic snap points * chore: updated examples * chore: updated examples * chore: added handleHeight prop * chore: rename internal components * chore: added default background * chore: updated handling nonflex views * chore: added dynamic snap point example
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147 changes: 147 additions & 0 deletions
147
example/src/screens/advanced/DynamicSnapPointExample.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| import React, { useCallback, useMemo, useRef, useState } from 'react'; | ||
| import { View, StyleSheet, Text } from 'react-native'; | ||
| import BottomSheet, { BottomSheetView } from '@gorhom/bottom-sheet'; | ||
| import { useSafeArea } from 'react-native-safe-area-context'; | ||
| import { Easing } from 'react-native-reanimated'; | ||
| import Button from '../../components/button'; | ||
|
|
||
| const DynamicSnapPointExample = () => { | ||
| // state | ||
| const [count, setCount] = useState(0); | ||
| const [contentHeight, setContentHeight] = useState(0); | ||
|
|
||
| // hooks | ||
| const bottomSheetRef = useRef<BottomSheet>(null); | ||
| const { bottom: safeBottomArea } = useSafeArea(); | ||
|
|
||
| // variables | ||
| const snapPoints = useMemo(() => [0, contentHeight], [contentHeight]); | ||
|
|
||
| // callbacks | ||
| const handleIncreaseContentPress = useCallback(() => { | ||
| setCount(state => state + 1); | ||
| }, []); | ||
| const handleDecreaseContentPress = useCallback(() => { | ||
| setCount(state => Math.max(state - 1, 0)); | ||
| }, []); | ||
| const handleExpandPress = useCallback(() => { | ||
| bottomSheetRef.current?.expand(); | ||
| }, []); | ||
| const handleClosePress = useCallback(() => { | ||
| bottomSheetRef.current?.close(); | ||
| }, []); | ||
| const handleOnLayout = useCallback( | ||
| ({ | ||
| nativeEvent: { | ||
| layout: { height }, | ||
| }, | ||
| }) => { | ||
| // console.log('SCREEN \t\t', 'handleOnLayout', height); | ||
| setContentHeight(height); | ||
| }, | ||
| [] | ||
| ); | ||
|
|
||
| // styles | ||
| const contentContainerStyle = useMemo( | ||
| () => ({ | ||
| ...styles.contentContainerStyle, | ||
| paddingBottom: safeBottomArea, | ||
| }), | ||
| [safeBottomArea] | ||
| ); | ||
| const emojiContainerStyle = useMemo( | ||
| () => ({ | ||
| ...styles.emojiContainer, | ||
| height: 50 * count, | ||
| }), | ||
| [count] | ||
| ); | ||
|
|
||
| // renders | ||
| const renderBackground = useCallback( | ||
| () => <View style={styles.background} />, | ||
| [] | ||
| ); | ||
|
|
||
| // console.log('SCREEN \t\t', 'render \t'); | ||
| return ( | ||
| <View style={styles.container}> | ||
| <Button | ||
| label="Expand" | ||
| style={styles.buttonContainer} | ||
| onPress={handleExpandPress} | ||
| /> | ||
| <Button | ||
| label="Close" | ||
| style={styles.buttonContainer} | ||
| onPress={handleClosePress} | ||
| /> | ||
| <BottomSheet | ||
| ref={bottomSheetRef} | ||
| snapPoints={snapPoints} | ||
| initialSnapIndex={1} | ||
| animateOnMount={true} | ||
| animationEasing={Easing.out(Easing.quad)} | ||
| animationDuration={250} | ||
| backgroundComponent={renderBackground} | ||
| > | ||
| <BottomSheetView | ||
| style={contentContainerStyle} | ||
| onLayout={handleOnLayout} | ||
| > | ||
| <Text style={styles.message}> | ||
| Could this sheet resize to its content height ? | ||
| </Text> | ||
| <View style={emojiContainerStyle}> | ||
| <Text style={styles.emoji}>😍</Text> | ||
| </View> | ||
| <Button | ||
| label="Yes" | ||
| style={styles.buttonContainer} | ||
| onPress={handleIncreaseContentPress} | ||
| /> | ||
| <Button | ||
| label="Mayby" | ||
| style={styles.buttonContainer} | ||
| onPress={handleDecreaseContentPress} | ||
| /> | ||
| </BottomSheetView> | ||
| </BottomSheet> | ||
| </View> | ||
| ); | ||
| }; | ||
|
|
||
| const styles = StyleSheet.create({ | ||
| container: { | ||
| flex: 1, | ||
| padding: 24, | ||
| }, | ||
| background: { | ||
| ...StyleSheet.absoluteFillObject, | ||
| backgroundColor: 'white', | ||
| }, | ||
| buttonContainer: { | ||
| marginBottom: 6, | ||
| }, | ||
| contentContainerStyle: { | ||
| paddingTop: 12, | ||
| paddingHorizontal: 24, | ||
| backgroundColor: 'white', | ||
| }, | ||
| message: { | ||
| fontSize: 24, | ||
| fontWeight: '600', | ||
| marginBottom: 12, | ||
| }, | ||
| emoji: { | ||
| fontSize: 156, | ||
| textAlign: 'center', | ||
| alignSelf: 'center', | ||
| }, | ||
| emojiContainer: { | ||
| justifyContent: 'center', | ||
| }, | ||
| }); | ||
|
|
||
| export default DynamicSnapPointExample; |
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