效果

添加悬浮效果和删除工具

this.graph.on('edge:mouseenter', ({ cell }) => {
  let cellId = cell.store.data.source.cell
   let sourceCell = _this.graph.getCellById(cellId)
   cell.attr('line', { stroke: '#cf1322', strokeWidth: 4, strokeDasharray: '0' })
   cell.zIndex = 100000000
   if (sourceCell.store.data.shape === 'CSA') {
     return false
   }
   if (sourceCell.store.data.shape === 'script') {
     let portID = cell.store.data.source.port
     let port = sourceCell.getPort(portID)
     if (port.attrs && port.attrs.noDEL) {
       return false
     }
   }
   cell.addTools([
     {
       name: 'button-remove',
       args: { distance: -40 },
     },
     {
       name: 'target-arrowhead',
       args: {
         attrs: {
           fill: '#1d39c4',
         },
       },
     },
   ])
 })

• zIndex 设置100000为了让高亮的边在其他边上方，这样点击删除按钮时候更方便。

取消悬浮效果

    this.graph.on('edge:mouseleave', ({ cell }) => {
      console.log(cell)
      cell.removeTools()
      cell.attr('line', { stroke: '#7C8394', strokeWidth: 1, strokeDasharray: '4, 2' })
      cell.zIndex = 0
    })

边删除后的回调函数

    this.graph.on('cell:removed', ({ cell, index, options }) => {
      console.log(cell)
    })