vue使用dagre-d3画流程图的完整代码

目录

• 一、安装依赖
• 二、dagre-d3基础
• 三、流程图
• 四、效果展示
• 五、节点点击事件
• 总结

tableList: [{
          name: "节点一",
          pre: []
        },{
          name: "节点二",
          pre: ["节点一"]
        },{
          name: "节点三",
          pre: ["节点一"]
        },{
          name: "节点四",
          pre: ["节点二", "节点三"]
        },{
          name: "节点五",
          pre: ["节点四"]
        },{
          name: "节点六",
          pre: ['节点四']
        },{
          name: "节点七",
          pre: ['节点五', '节点六']
        }]

async changeData() {
        // 给每个节点设置对应的编号
        this.tableList.map((v, i) => {
          this.indexObj[v.name] = i;
        });
        await this.tableList.map(async (v, i) => {
          // 点
          this.nodes.push({
            id: i,
            nodeName: v.name,
            shape: "rect"
          });
          // 线
          let arr = await this.getLine(v);
          this.edges = this.edges.concat(arr);
        });
        this.draw();
      },
      getLine(node) {
        let brr = [];
        if (node.pre.length) {
          if (node.pre.length === 1) {
            brr.push({
              start: this.indexObj[node.pre[0]],
              end: this.indexObj[node.name],
              label: ""
            });
          } else {
            node.pre.map(v => {
              brr.push({
                start: this.indexObj[v],
                end: this.indexObj[node.name],
                label: ""
              });
            });
          }
        }
        return brr;
      },

<template>
  <div style="border: 1px solid #ccc; padding: 20px; width: 600px">
    <svg class="dagre" width="600" height="600">
      <g class="container"></g>
    </svg>
    <div ref="tooltip" class="tooltip">
      <div>节点ID：{{currentNode.id}}</div>
      <div>节点名称：{{currentNode.nodeName}}</div>
    </div>
  </div>
</template>

<script>
  import dagreD3 from 'dagre-d3';
  import * as d3 from 'd3';

  export default {
    name: 'dagre',
    props: {
      tableList: {
        type: Array,
        default: []
      }
    },
    data() {
      return {
        currentNode: {
          id: null,
          nodeName: '',
        },
        nodes: [],
        edges: [],
        indexObj: {},
        // nodes: [
        //   {id: 0,nodeName: "A",shape: "rect"},
        //   {id: 1,nodeName: "B",shape: "diamond"},
        //   {id: 2,nodeName: "C",shape: "rect"},
        //   {id: 3,nodeName: "D",shape: "rect"},
        //   {id: 4,nodeName: "E",shape: "rect"},
        //   {id: 5,nodeName: "F",shape: "rect"}
        // ],
        // edges: [
        //   {start: 0,end: 1,label: "哈哈"},
        //   {start: 1,end: 2,label: ""},
        //   {start: 1,end: 3,label: ""},
        //   {start: 2,end: 4,label: ""},
        //   {start: 3,end: 5,label: ""},
        //   {start: 4,end: 5,label: ""}
        // ],
      };
    },
    mounted() {
      // 把表格的数据转成节点和线条
      this.changeData();
      // this.draw();
    },
    methods: {
      async changeData() {
        // 给每个节点设置对应的编号
        this.tableList.map((v, i) => {
          this.indexObj[v.name] = i;
        });
        await this.tableList.map(async (v, i) => {
          // 点
          this.nodes.push({
            id: i,
            nodeName: v.name,
            shape: "rect"
          });
          // 线
          let arr = await this.getLine(v);
          this.edges = this.edges.concat(arr);
        });
        this.draw();
      },
      getLine(node) {
        let brr = [];
        if (node.pre.length) {
          if (node.pre.length === 1) {
            brr.push({
              start: this.indexObj[node.pre[0]],
              end: this.indexObj[node.name],
              label: ""
            });
          } else {
            node.pre.map(v => {
              brr.push({
                start: this.indexObj[v],
                end: this.indexObj[node.name],
                label: ""
              });
            });
          }
        }
        return brr;
      },
      // 绘制简单的流程图
      draw() {
        // 创建 Graph 对象
        const g = new dagreD3.graphlib.Graph().setGraph({
          rankdir: 'LR', // 流程图从下向上显示，默认'TB'，可取值'TB'、'BT'、'LR'、'RL'
        }).setDefaultEdgeLabel(function () {
          return {};
        });

        // Graph添加节点
        this.nodes.forEach(node => {
          g.setNode(node.id, {
            id: node.id,
            label: node.nodeName,
            shape: node
            .shape, //节点形状，可以设置rect(长方形),circle,ellipse(椭圆),diamond(菱形) 四种形状，还可以使用render.shapes()自定义形状
            style: 'fill:#fff;stroke:#70baff', //节点样式,可设置节点的颜色填充、节点边框 fill:#61b2e4;stroke:#fff
            labelStyle: 'fill: #000;font-weight:bold', //节点标签样式, 可设置节点标签的文本样式（颜色、粗细、大小）fill: #fff;font-weight:bold
            rx: 5, // 设置圆角
            ry: 5, // 设置圆角
            paddingBottom: 15,
            paddingLeft: 20,
            paddingRight: 20,
            paddingTop: 15,
          });
        });

        // Graph添加节点之间的连线
        if (this.nodes.length > 1) {
          this.edges.forEach(edge => {
            g.setEdge(edge.start, edge.end, {
              label: edge.label, //边标签
              style: 'stroke: #70baff; fill: none; stroke-width: 2px', // 连线样式
              arrowheadStyle: 'fill: #70baff;stroke: #70baff;', //箭头样式，可以设置箭头颜色
              arrowhead: 'normal', //箭头形状，可以设置 normal,vee,undirected 三种样式，默认为 normal
            })
          });
        }

        // 获取要绘制流程图的绘图容器
        const container = d3.select('svg.dagre').select('g.container');

        // 创建渲染器
        const render = new dagreD3.render();
        // 在绘图容器上运行渲染器绘制流程图
        render(container, g);

        // 拖拽缩放
        const svg = d3.select('svg.dagre');
        let zoom = d3.zoom().scaleExtent([0.5, 2]).on('zoom', current => {
          container.attr('transform', current.transform);
        });
        svg.call(zoom);


        // 鼠标悬停显示隐藏tooltip
        const that = this;
        const tooltipBox = that.$refs.tooltip;
        container.on('mouseover', e => {
          if (e.target.nodeName === "rect") {
            that.currentNode = that.nodes.filter(item => item.id === Number(e.target.__data__))[0];
            tooltipBox.style.display = 'block';
            tooltipBox.style.top = e.clientY + 20 + 'px';
            tooltipBox.style.left = e.clientX + 'px';
          }
        }).on('mouseout', function () {
          tooltipBox.style.display = 'none';
        })
      },
    },
  };

</script>

<style scoped>
  .tooltip {
    position: absolute;
    font-size: 12px;
    background-color: white;
    border-radius: 3px;
    box-shadow: rgb(null, 174, 174) 0px 0px 10px;
    cursor: pointer;
    display: none;
    padding: 10px;
  }

  .tooltip>div {
    padding: 10px;
  }

</style>

d3.selectAll('.node').on('mousedown', (e) => {
    if(e.target.nodeName === "rect") {
      if(e.target.style.fill === "rgb(null, 178, 228)") {
        e.target.style = "fill:#877ee1;stroke:#fff";
      } else {
        e.target.style = "fill:#61b2e4;stroke:#fff";
      }
    }
});