mldong-flow-designer-plus/packages/flow-designer/src/node/Fork.ts

本项目包含了作者为B站课堂视频[《工作流设计器开发最佳实践》](https://www.bilibili.com/cheese/play/ss24484)的过程源码。教程中开发的组件也可用于实际生产环境中。以下是和使用文档和课程章节说明。 ## 实战项目 [演示地址](https://flow-pro.mldong.com/)

// Fork.ts
import { ColorEnum, NodeStateEnum } from "../types/enums";
import { DiamondNode, DiamondNodeModel, h } from "@logicflow/core";
import forkSvgStr from '../assets/fork.svg?raw'
import { parseSvg } from '../tool'
const paths = parseSvg(forkSvgStr)
class ForkModel extends DiamondNodeModel {
  setAttributes(): void {
    this.text.value = "";
    this.rx = 28;
    this.ry = 28;
    this.text.draggable = false;
    this.text.editable = false;
  }
  getNodeStyle() {
    const theme = this.graphModel.props.theme;
    const style = super.getNodeStyle();
    if(this.properties.state == NodeStateEnum.history) {
      style.stroke = theme.historyColor || ColorEnum.historyColor;
    } else if(this.properties.state == NodeStateEnum.active) {
      style.stroke = theme.activeColor || ColorEnum.activeColor;
    } else {
      style.stroke = theme.primaryColor || ColorEnum.primaryColor;
    }
    // style.strokeDasharray = "3 3";
    return style;
  }
}

class ForkView extends DiamondNode {
  private getLabelShape() {
    const { model } = this.props;
    const { x, y} = model;
    const style = model.getNodeStyle();
    const innerWH = 28;
    return h(
      "svg",
      {
        x: x - innerWH/2,
        y: y - innerWH/2,
        width: innerWH,
        height: innerWH,
        viewBox: "0 0 1024 1024"
      },
      ...paths.map(d=>{
        return h("path", {
          fill: style.stroke,
          d
        })
      }),
    );
  }

 /**
   * 完全自定义节点外观方法
   */
 getShape() {
  const outCircle = super.getShape();
  return h("g", {}, [
    outCircle,
    this.getLabelShape()
  ]);
}
}

export default {
  type: "fork",
  view: ForkView,
  model: ForkModel,
};