使用joinjs绘制流程图（六）-自定义节点成html元素

场景

有的时候流程图中的节点是多样化的

效果

代码

<template>
  <div class="app">
    <el-button type="primary" size="small" @click="updateRectContent"
      >修改Rect元素内容</el-button
    >
    <hr />
    <div ref="myholder" id="paper"></div>
  </div>
</template>

<script>
import * as joint from '@joint/core'
export default {
  data() {
    return {
      graph: null,
    }
  },
  mounted() {
    const namespace = joint.shapes
    var graph = new joint.dia.Graph({}, { cellNamespace: namespace })
    this.graph = graph

    var paper = new joint.dia.Paper({
      el: this.$refs.myholder,
      model: this.graph,
      width: 800,
      height: 300,
      cellViewNamespace: namespace,
      drawGrid: true,
      gridSize: 10,
      background: {
        color: 'rgba(0, 255, 0, 0.3)',
      },
      // 禁止交互
      interactive: false, // disable default interaction (e.g. dragging)
      // 当mousemove事件的数量超过clickThreshold时，在mouseup之后不会触发pointerclick事件
      clickThreshold: 10,
    })
    // paper.on('element:pointerclick', function (elementView) {
    //   console.log(elementView)
    //   // var currentElement = elementView.model
    //   // currentElement.attr('body/stroke', 'orange')
    // })

    // const node1 = this.drawRect({ x: 50, y: 30 }, '流程-1')
    // const node2 = this.drawRect({ x: 200, y: 30 }, '流程-2')
    // const node3 = this.drawRect({ x: 350, y: 30 }, '流程-3')
    // const node4 = this.drawRect({ x: 500, y: 30 }, '流程-4')
    // const node5 = this.drawRect({ x: 50, y: 100 }, '流程-1.1')
    // const node6 = this.drawRect({ x: 350, y: 100 }, '流程-2.1')
    // const node7 = this.drawRect({ x: 350, y: 150 }, '流程-2.2')

    // const node2_to_node6_vetices = [new joint.g.Point(250, 100)]
    // const node2_to_node7_vetices = [new joint.g.Point(250, 150)]

    // this.drawLine(node1, node2)
    // this.drawLine(node2, node3)
    // this.drawLine(node3, node4)
    // this.drawLine(node1, node5)
    // this.drawLine(node2, node6, node2_to_node6_vetices)
    // this.drawLine(node2, node7, node2_to_node7_vetices)

    // 双击元素时触发
    // paper.on('element:pointerdblclick', function (elementView) {
    //   console.log(elementView)
    //   var currentElement = elementView.model
    //   console.log('currentElement:', currentElement)
    //   currentElement.attr('body/stroke', 'orange')
    // })

    // 单击元素时触发
    // paper.on('element:pointerclick', function (elementView) {
    //   console.log(elementView)
    //   // var currentElement = elementView.model
    //   // currentElement.attr('body/stroke', 'orange')
    // })

    // 创建可以自定义html的方法
    // joint.shapes.html = {}
    // joint.shapes.html.Element = joint.shapes.basic.Rect.extend({
    //   defaults: joint.util.defaultsDeep(
    //     {
    //       type: 'html.Element',
    //       attrs: {
    //         rect: { stroke: 'none', 'fill-opacity': 0 },
    //       },
    //     },
    //     joint.shapes.basic.Rect.prototype.defaults
    //   ),
    // })

    const element = new joint.shapes.standard.Rectangle()
    element.position(100, 50)
    element.resize(100, 40)
    element.addTo(this.graph)

    var bbox = element.getBBox()
    var clientRect1 = paper.localToClientRect(bbox)
    // alternative method signature
    var clientRect2 = paper.localToClientRect(
      bbox.x,
      bbox.y,
      bbox.width,
      bbox.height
    )
    // Draw an HTML rectangle above the element.
    var div = document.createElement('div')
    div.style.position = 'fixed'
    div.style.background = 'red'
    div.style.left = clientRect1.x + 'px'
    div.style.top = clientRect1.y + 'px'
    div.style.width = clientRect1.width + 'px'
    div.style.height = clientRect1.height + 'px'
    const text = element.attr('label').text
    div.innerHTML = `<span class='yellow'>哈哈哈</span>`
    // console.log(element.attr('label'))
    paper.el.appendChild(div)
    // clientRect1.on('element:pointerclick', function () {
    //   console.log(11)
    // })
  },
  methods: {
    drawRect({ x, y }, text) {
      var rect = new joint.shapes.standard.Rectangle()
      rect.position(x, y)
      rect.resize(100, 40)
      rect.attr({
        body: {
          fill: '#2c3e50',
        },
        label: {
          text,
          fill: '#3498DB',
          fontSize: 18,
          fontWeight: 'bold',
          fontVariant: 'Microsoft YaHei',
        },
      })
      rect.addTo(this.graph)
      return rect
    },
    drawLine(node1, node2, vertices) {
      var link = new joint.shapes.standard.Link()
      link.source(node1)
      link.target(node2)
      link.addTo(this.graph)

      if (vertices) {
        link.vertices(vertices)
        link.router('orthogonal')
        // link.connector('rounded')
      }
      // link.vertices([
      //   new joint.g.Point(250, 100),
      //   new joint.g.Point(280, 100),
      //   new joint.g.Point(300, 120),
      // ])
      //
      link.attr({
        line: {
          stroke: 'gray',
        },
      })
    },
    updateRectContent() {
      console.log(this.graph)
      // console.log(this.graph.getElements())
      const elements = this.graph.getElements()

      console.log(elements[0])
      // 获取原来的文本
      // console.log(elements[0].attr('label'))
      const node_1 = elements[0]
      node_1.attr({
        label: {
          text: '测试',
        },
      })
    },
  },
}
</script>

<style lang="less" scoped>
#paper {
  border: 1px solid;
}

/deep/.yellow {
  color: yellow;
}
</style>