115 lines
3.8 KiB
TypeScript
115 lines
3.8 KiB
TypeScript
import { Input, View } from "@tarojs/components"
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import { useEffect, useMemo, useRef, useState } from "react"
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import Big from 'big.js'
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import styles from "./index.module.scss"
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type params = {
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minNum?: number, //最小值
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maxNum?: number, //最大值
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step?: number, //步长
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defaultNum?: number, //默认值
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digits?: number //多少位小数
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onChange?:(val:number) => void,
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onBlue?:(val:number) => void, //失去焦点触发
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onClickBtn?:(val:number) => void,
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unit?: string,
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disable?: true|false, //是否禁用
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}
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export default ({minNum = 0, maxNum = 10000, step=1, digits = 0, defaultNum = 0, onChange, onBlue, onClickBtn, unit = '', disable = false}: params) => {
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const [value, setValue] = useState<any>({count:defaultNum})
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const onPlus = () => {
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if(disable) return false
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let {count} = value
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let num_res = Big(count).add(step).toNumber()
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num_res = num_res >= maxNum?maxNum:num_res
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num_res = formatDigits(num_res)
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setValue({...value, count:num_res})
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onChange?.(parseFloat(num_res))
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onClickBtn?.(parseFloat(num_res))
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}
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const minus = () => {
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if(disable) return false
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let {count} = value
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let num_res = Big(count).minus(step).toNumber()
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num_res = num_res < minNum?minNum:num_res
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setValue({...value, count:num_res})
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onChange?.(parseFloat(num_res))
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onClickBtn?.(parseFloat(num_res))
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}
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//保留小数
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const formatDigits = (num) => {
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num = num + ''
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if(num.includes('.')&&digits > 0) {
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console.log('num::',num.includes('.'))
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let res = num.split('.')
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let last_num = res[1].substr(0, digits)
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return res[0] + '.' + last_num
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}
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return parseFloat(num)
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}
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//检查数据
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const checkData = (val) => {
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let num = parseFloat(val)
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if(num > maxNum) return maxNum
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if(num < minNum) return minNum
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return val
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}
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const onInputEven = (e) => {
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let res = e.detail.value
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if(res === '') {
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setValue({...value, count:minNum})
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onChange?.(minNum)
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}
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else if(!isNaN(Number(res))) {
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let count = formatDigits(res)
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count = checkData(count)
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setValue({...value, count})
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onChange?.(parseFloat(count as string))
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} else {
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let num = parseFloat(res)
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if(!isNaN(num)) {
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let count = formatDigits(num)
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count = checkData(count)
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setValue({...value, count})
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onChange?.(count as number)
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} else {
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setValue({...value, count:defaultNum})
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onChange?.(defaultNum)
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}
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}
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}
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const onBluerEven = () => {
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let num = parseFloat(value.count)
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if(!isNaN(num)) {
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let count = formatDigits(num)
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count = checkData(count)
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setValue({...value, count})
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onBlue?.(count as number)
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} else {
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setValue({...value, count:defaultNum})
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onBlue?.(defaultNum)
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}
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}
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return (
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<View className={styles.main}>
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<View className={styles.reduce} onClick={() => minus()}>-</View>
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<View className={styles.input}>
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<Input
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value={String(value.count)}
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onInput={onInputEven}
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onBlur={onBluerEven}
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type='digit'
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disabled={disable}
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/>
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<View className={styles.unit}>{unit}</View>
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</View>
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<View className={styles.plus} onClick={() => onPlus()}>+</View>
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</View>
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)
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} |