阿里低代码框架lowcode-engine自定义设置器详解

npm init @alilc/element lowcode-app-material  // lowcode-app-material项目名称

npm & yarn install

yarn dev

import * as React from "react";
import { Input } from "@alifd/next";
import "./index.scss";
interface AltStringSetterProps {
  // 当前值
  value: string;
  // 默认值
  initialValue: string;
  // setter 唯一输出
  onChange: (val: string) => void;
  // AltStringSetter 特殊配置
  placeholder: string;
}
export default class AltStringSetter extends React.PureComponent<AltStringSetterProps> {
  componentDidMount() {
    const { onChange, value, defaultValue } = this.props;
    if (value == undefined && defaultValue) {
      onChange(defaultValue);
    }
  }
  // 声明 Setter 的 title
  static displayName = 'AltStringSetter';
  render() {
    const { onChange, value, placeholder } = this.props;
    return (
      <Input
        value={value}
        placeholder={placeholder || ""}
        onChange={(val: any) => onChange(val)}
      ></Input>
    );
  }
}

import AltStringSetter from 'AltStringSetter';
import { setters } from '@alilc/lowcode-engine';
const { registerSetter } = registerSetter;
registerSetter('AltStringSetter', AltStringSetter);

import React, { createElement } from 'react';
import { Switch, Select, Input, Button, } from '@alifd/next';
import { event } from '@alilc/lowcode-engine';
import './style.less';
const Option = Select.Option;
export interface DefaultValueSetterProps {
  fieldType: 'input' | 'textarea' | 'number',
  onChange: (value) => void;
  value: IValue
}
export interface DefaultValueSetterState {}
export class DefaultValueSetter extends React.Component<DefaultValueSetterProps, DefaultValueSetterState> {
  static displayName = 'DefaultValueSetter';
  constructor(props) {
    super(props);
    this.state = {
    };
  }
  componentDidMount(): void {
    event.on(EDefaultValueSetterEventName.ValueChange, this.formulaValueChange)
  }
  // ...省略部分代码
  handleValueTypeChange = (valueType) => {
    const { onChange, value } = this.props;
    onChange({
      ...value,
      valueType
    });
  }
  handleValueChange = (currValue) => {
    const { onChange, value } = this.props;
    const newVale = {
      ...value,
      value: currValue,
    };
    onChange(newVale);
  }
  render() {
    const { fieldType, value } = this.props;
    console.log('value, defaultValue', value, this.props)
    return (<div className="lowcode-setter-ui-material-setter">
      <Select style={{ width: '100%', marginBottom: 10 }} value={value?.valueType} onChange={this.handleValueTypeChange}>
        <Option value='1'>自定义</Option>
        <Option value='2'>公式编辑</Option>
      </Select>
      {this.getItem()}
    </div>)
  }
}

  {
        "title": {
          "label": {
            "type": "i18n",
            "en-US": "format",
            "zh-CN": "默认值"
          }
        },
        "name": "defaultValue",
        "setter": {
          "componentName": DefaultValueSetter, //默认值设置器
          "props": {
            "fieldType": 'input'
          },
          "isRequired": false,
          "initialValue": {
            valueType: '1',
            value: "",
          }
        }
      },