74 lines
2.7 KiB
TypeScript
74 lines
2.7 KiB
TypeScript
/* sheetjs (C) SheetJS -- https://sheetjs.com */
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import React, { useState, useCallback } from 'react';
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import { StyleSheet, Text, Button, Alert, Image, ScrollView } from 'react-native';
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import { Table, Row, Rows, TableWrapper } from 'react-native-table-component';
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import { read, utils, WorkSheet } from 'xlsx';
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const make_width = (ws: WorkSheet): number[] => {
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const aoa = utils.sheet_to_json(ws, {header:1}), res: number[] = [];
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aoa.forEach((r) => { r.forEach((c, C) => { res[C] = Math.max(res[C]||60, String(c).length * 10); }); });
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for(let C = 0; C < res.length; ++C) if(!res[C]) res[C] = 60;
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return res;
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};
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function App(): JSX.Element {
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const [data, setData] = useState<any[]>([
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"SheetJS".split(""),
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[5,4,3,3,7,9,5],
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[8,6,7,5,3,0,9]
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]);
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const [widths, setWidths] = useState<number[]>(Array.from({length:7}, () => 20));
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const importFile = useCallback(async() => {
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try {
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const ab = await (await fetch("https://sheetjs.com/pres.numbers")).arrayBuffer();
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const wb = read(ab);
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/* convert first worksheet to AOA */
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const wsname = wb.SheetNames[0];
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const ws = wb.Sheets[wsname];
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const data = utils.sheet_to_json(ws, {header:1});
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/* update state */
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setData(data);
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setWidths(make_width(ws));
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} catch(err) {
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Alert.alert("importFile Error", "Error " + ((err as any).message || err));
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}
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}, []);
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return (
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<ScrollView contentContainerStyle={styles.container}>
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<Text style={styles.welcome}> </Text>
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<Text style={styles.welcome}> <Image source={require("./logo.png")} style={styles.image}/> SheetJS × React Native</Text>
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<Button onPress={importFile} title="Import data from a spreadsheet" color="#841584" />
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<Text style={styles.bolded}>Current Data</Text>
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<ScrollView style={styles.table} horizontal={true} >
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<Table style={styles.table}>
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<TableWrapper>
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<Row data={data[0]} style={styles.thead} textStyle={styles.text} widthArr={widths}/>
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</TableWrapper>
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<ScrollView>
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<TableWrapper>
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<Rows data={data.slice(1)} style={styles.tr} textStyle={styles.text} widthArr={widths}/>
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</TableWrapper>
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</ScrollView>
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</Table>
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</ScrollView>
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</ScrollView>
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);
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}
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const styles = StyleSheet.create({
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container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF' },
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welcome: { fontSize: 20, textAlign: 'center', margin: 10 },
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bolded: { textAlign: 'center', color: '#333333', marginBottom: 5, fontWeight: "bold" },
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thead: { height: 40, backgroundColor: '#f1f8ff' },
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tr: { height: 30 },
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text: { marginLeft: 5, },
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table: { width: "100%" },
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image: { height: 16, width: 16 }
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});
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export default App;
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