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Merge pull request #25 from azimgd/example-nav
Enhanced example app
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example/android/app/src/main/java/shadowlist/example/MainActivity.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,140 +1,15 @@ | ||
| import { useRef, useCallback, useEffect } from 'react'; | ||
| import { View, StyleSheet, Text } from 'react-native'; | ||
| import type { DirectEventHandler } from 'react-native/Libraries/Types/CodegenTypes'; | ||
| import { | ||
| Shadowlist, | ||
| type OnStartReached, | ||
| type OnEndReached, | ||
| type OnVisibleChange, | ||
| type OnScroll, | ||
| type SLContainerRef, | ||
| } from 'shadowlist'; | ||
| import useData from './useData'; | ||
| import Element from './Element'; | ||
| import { createStaticNavigation, DarkTheme } from '@react-navigation/native'; | ||
| import { createNativeStackNavigator } from '@react-navigation/native-stack'; | ||
| import HomeScreen from './HomeScreen'; | ||
|
|
||
| const ITEMS_COUNT = 50; | ||
| const IS_INVERTED = false; | ||
| const IS_HORIZONTAL = false; | ||
| const INITIAL_SCROLL_INDEX = 0; | ||
| const FINAL_SCROLL_INDEX = 0; | ||
|
|
||
| const ListHeaderComponent = () => ( | ||
| <View style={styles.static}> | ||
| <Text style={styles.text}>Header</Text> | ||
| </View> | ||
| ); | ||
|
|
||
| const ListFooterComponent = () => ( | ||
| <View style={styles.static}> | ||
| <Text style={styles.text}>Footer</Text> | ||
| </View> | ||
| ); | ||
| const RootStack = createNativeStackNavigator({ | ||
| screens: { | ||
| Home: HomeScreen, | ||
| }, | ||
| }); | ||
|
|
||
| const ListEmptyComponent = () => ( | ||
| <View style={styles.static}> | ||
| <Text style={styles.text}>Empty</Text> | ||
| </View> | ||
| ); | ||
| const Navigation = createStaticNavigation(RootStack); | ||
|
|
||
| export default function App() { | ||
| const data = useData({ length: ITEMS_COUNT, inverted: IS_INVERTED }); | ||
| const ref = useRef<SLContainerRef>(null); | ||
|
|
||
| useEffect(() => { | ||
| if (!FINAL_SCROLL_INDEX) return; | ||
| setTimeout(() => { | ||
| ref.current?.scrollToIndex({ index: FINAL_SCROLL_INDEX }); | ||
| }, 1000); | ||
| }, []); | ||
|
|
||
| const onStartReached = useCallback<DirectEventHandler<OnStartReached>>( | ||
| (event) => { | ||
| !IS_INVERTED ? data.loadPrepend() : data.loadAppend(); | ||
| event.nativeEvent.distanceFromStart; | ||
| }, | ||
| [data] | ||
| ); | ||
|
|
||
| const onEndReached = useCallback<DirectEventHandler<OnEndReached>>( | ||
| (event) => { | ||
| !IS_INVERTED ? data.loadAppend() : data.loadPrepend(); | ||
| event.nativeEvent.distanceFromEnd; | ||
| }, | ||
| [data] | ||
| ); | ||
|
|
||
| const onVisibleChange = useCallback<DirectEventHandler<OnVisibleChange>>( | ||
| (event) => { | ||
| event.nativeEvent.visibleEndIndex; | ||
| }, | ||
| [] | ||
| ); | ||
|
|
||
| const onScroll = useCallback<DirectEventHandler<OnScroll>>((event) => { | ||
| event.nativeEvent.contentOffset.y; | ||
| }, []); | ||
|
|
||
| const templateYarrow = () => ( | ||
| <Element | ||
| onPress={(index: number) => data.update(index)} | ||
| data={data.data} | ||
| style={{ backgroundColor: '#00cec9' }} | ||
| /> | ||
| ); | ||
|
|
||
| const templateRobin = () => ( | ||
| <Element | ||
| onPress={(index: number) => data.update(index)} | ||
| data={data.data} | ||
| style={{ backgroundColor: '#fdcb6e' }} | ||
| /> | ||
| ); | ||
|
|
||
| return ( | ||
| <View style={styles.container}> | ||
| <Shadowlist | ||
| ref={ref} | ||
| templates={{ | ||
| ListTemplateComponentUniqueIdYarrow: templateYarrow, | ||
| ListTemplateComponentUniqueIdRobin: templateRobin, | ||
| }} | ||
| data={data.data} | ||
| onVisibleChange={onVisibleChange} | ||
| onStartReached={onStartReached} | ||
| onEndReached={onEndReached} | ||
| onScroll={onScroll} | ||
| ListHeaderComponent={ListHeaderComponent} | ||
| ListHeaderComponentStyle={styles.static} | ||
| ListFooterComponent={ListFooterComponent} | ||
| ListFooterComponentStyle={styles.static} | ||
| ListEmptyComponent={ListEmptyComponent} | ||
| ListEmptyComponentStyle={styles.static} | ||
| inverted={IS_INVERTED} | ||
| horizontal={IS_HORIZONTAL} | ||
| initialScrollIndex={INITIAL_SCROLL_INDEX} | ||
| numColumns={1} | ||
| contentContainerStyle={styles.list} | ||
| /> | ||
| </View> | ||
| ); | ||
| return <Navigation theme={DarkTheme} />; | ||
| } | ||
|
|
||
| const styles = StyleSheet.create({ | ||
| container: { | ||
| flex: 1, | ||
| backgroundColor: '#333333', | ||
| paddingTop: 60, | ||
| }, | ||
| list: { | ||
| flex: 1, | ||
| }, | ||
| text: { | ||
| color: '#333333', | ||
| backgroundColor: '#1dd1a1', | ||
| padding: 16, | ||
| }, | ||
| static: { | ||
| height: 120, | ||
| backgroundColor: '#576574', | ||
| }, | ||
| }); |
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