Vue-super-flow 是基于vue 开发的一款生成、预览流程图的组件。使用者可以根据不同的需求对图、节点、连线进行细致的控制。

一、安装

npm install vue-super-flow

由于vue-super-flow使用的是element-ui进行构建，所以如果项目中没有安装element-ui的话，还需要进行安装：element-ui的安装使用步骤

二、引用（选择其中一种方式即可）
①全局引用：在main.js文件中添加

import SuperFlow from 'vue-super-flow'
import 'vue-super-flow/lib/index.css'

Vue.use(SuperFlow)

②局部引用：在要用到vue-super-flow组件的vue文件中添加

<template>
  <super-flow></super-flow>
</template>

<script >
  import SuperFlow from 'vue-super-flow' 
  import 'vue-super-flow/lib/index.css'
  export default {
    components: {SuperFlow}   
  } 
</script>

三、示例

上图中，左侧是流程图可选择的node类型，包括开始节点、过程节点、条件节点和结束节点；中间是流程图展示区域；右侧是link样式的设置，包括连线的颜色、鼠标放上去时连线的颜色、文本的颜色、鼠标放上去时文本的颜色、文本字体、文本背景颜色、连线是否是点线的、点线的点的长度和空隙的长度设置。
上面示例与官网示例相比，除了布局上的改变，还设置了nodeList和linkList，即首次加载时页面上就会显示这两个数组预设的流程图，除此之外，也还可以像官网示例一样拖拽绘制流程图。
完整代码：

<template>
  <v-container class="loan-work-queue" grid-list-xl fluid>
    <v-row style="height: 771px;">
      <v-col cols="9">
        <div class="super-flow-demo1">
          <div class="node-container">
            <span
                class="node-item"
                v-for="(item, index) in nodeItemList"
                :key="index"
                @mousedown="evt => nodeItemMouseDown(evt, item.value)">
              {{ item.label }}
            </span>
          </div>
          <div
            class="flow-container"
            ref="flowContainer"
            @click="flowNodeClick">
            <super-flow
              @toJSON="toJSON"
              ref="superFlow"
              :graph-menu="graphMenu"
              :node-menu="nodeMenu"
              :link-menu="linkMenu"
              :link-base-style="linkBaseStyle"
              :link-style="linkStyle"
              :link-desc="linkDesc"
              :node-list="nodeList"
              :link-list="linkList">
              <template v-slot:node="{meta}">
                <div
                  @mouseup="nodeMouseUp"
                  @click="nodeClick"
                  :class="meta.type? `flow-node-${meta.type}`: ''"
                  class="flow-node ellipsis">
                  <div class="node-content" :title="meta.name">{{ meta.name }}</div>
                </div>
              </template>
            </super-flow>
            <v-btn
              text
              @click="saveFlow"
              color="primary"
              class="saveIcon"
              >SAVE
            </v-btn>
          </div>
        </div>
      </v-col>
      <v-col cols="3">
        <div>
          <el-form
            class="link-base-style-form"
            ref="linkBaseStyle"
            label-width="100px"
            @submit.native.prevent
            :model="linkBaseStyle">
            <h4 class="style-title">Link style customization</h4>
            <v-row>
              <v-col cols="12">
                <el-form-item label="color">
                  <el-color-picker
                    v-model="linkBaseStyle.color">
                  </el-color-picker>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="hover">
                  <el-color-picker
                    v-model="linkBaseStyle.hover">
                  </el-color-picker>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="textColor">
                  <el-color-picker
                    v-model="linkBaseStyle.textColor">
                  </el-color-picker>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="textHover">
                  <el-color-picker
                    v-model="linkBaseStyle.textHover">
                  </el-color-picker>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="font">
                  <el-select
                    size="medium"
                    v-model="linkBaseStyle.font">
                    <el-option
                      v-for="item in fontList"
                      :key="item"
                      :label="item"
                      :value="item">
                    </el-option>
                  </el-select>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="background">
                  <el-color-picker
                    v-model="linkBaseStyle.background">
                  </el-color-picker>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="dotted">
                  <el-switch
                    v-model="linkBaseStyle.dotted"
                    active-color="#13ce66"
                    inactive-color="#ff4949">
                  </el-switch>
                </el-form-item>
              </v-col>
              <v-col cols="12">
                <el-form-item label="lineDash">
                  <el-select
                    size="medium"
                    style="width: 80px"
                    v-model="linkBaseStyle.lineDash[0]">
                    <el-option
                      v-for="item in [1,2,3,4,5,6,7,8]"
                      :key="item"
                      :label="item"
                      :value="item">
                    </el-option>
                  </el-select>
                  <el-select
                    size="medium"
                    style="width: 80px"
                    v-model="linkBaseStyle.lineDash[1]">
                    <el-option
                      v-for="item in [1,2,3,4,5,6,7,8]"
                      :key="item"
                      :label="item"
                      :value="item">
                    </el-option>
                  </el-select>
                </el-form-item>
              </v-col>
            </v-row>
          </el-form>
        </div>
      </v-col>
    </v-row>

    <el-dialog
        :title="drawerConf.title"
        :visible.sync="drawerConf.visible"
        :close-on-click-modal="false"
        width="500px">
      <el-form
          @keyup.native.enter="settingSubmit"
          @submit.native.prevent
          v-show="drawerConf.type === drawerType.node"
          ref="nodeSetting"
          :model="nodeSetting">
        <el-form-item
            label="node name"
            prop="name">
          <el-input
              v-model="nodeSetting.name"
              placeholder="Please enter the node name"
              maxlength="30">
          </el-input>
        </el-form-item>
        <el-form-item
            label="node description"
            prop="desc">
          <el-input
              v-model="nodeSetting.desc"
              placeholder="Please enter a node description"
              maxlength="30">
          </el-input>
        </el-form-item>
      </el-form>
      <el-form
          @keyup.native.enter="settingSubmit"
          @submit.native.prevent
          v-show="drawerConf.type === drawerType.link"
          ref="linkSetting"
          :model="linkSetting">
        <el-form-item
            label="link description"
            prop="desc">
          <el-input
              v-model="linkSetting.desc"
              placeholder="Please enter a link description">
          </el-input>
        </el-form-item>
      </el-form>
      <span
          slot="footer"
          class="dialog-footer">
        <el-button
            @click="drawerConf.cancel">
          CANCEL
        </el-button>
        <el-button
            type="primary"
            @click="settingSubmit">
          OK
        </el-button>
      </span>
    </el-dialog>
  </v-container>
</template>

<script>
import SuperFlow from 'vue-super-flow'
import 'vue-super-flow/lib/index.css'

const drawerType = {
  node: 0,
  link: 1
}

export default {
  components: {
    SuperFlow
  },
  data () {
    return {
      nodeList: [
        {
          id: 1,
          coordinate: [400, 120],
          width: 120,
          height: 40,
          meta: {
            label: 'start',
            name: 'start',
            type: 'start'
          }
        },
        {
          id: 2,
          coordinate: [360, 235],
          width: 200,
          height: 40,
          meta: {
            label: 'process',
            name: 'process',
            type: 'process'
          }
        },
        {
          id: 3,
          coordinate: [400, 360],
          width: 120,
          height: 40,
          meta: {
            label: 'end',
            name: 'end',
            type: 'end'
          }
        }
      ],
      linkList: [
        {
          id: 4,
          startAt: [60, 40],
          startId: 1,
          endAt: [100, 0],
          endId: 2,
          meta: null
        },
        {
          id: 5,
          startAt: [100, 40],
          startId: 2,
          endAt: [60, 0],
          endId: 3,
          meta: null
        }
      ],
      drawerType,
      drawerConf: {
        title: '',
        visible: false,
        type: null,
        info: null,
        open: (type, info) => {
          const conf = this.drawerConf
          conf.visible = true
          conf.type = type
          conf.info = info
          if (conf.type === drawerType.node) {
            conf.title = 'NODE'
            if (this.$refs.nodeSetting) this.$refs.nodeSetting.resetFields()
            this.$set(this.nodeSetting, 'name', info.meta.name)
            this.$set(this.nodeSetting, 'desc', info.meta.desc)
          } else {
            conf.title = 'LINK'
            if (this.$refs.linkSetting) this.$refs.linkSetting.resetFields()
            this.$set(this.linkSetting, 'desc', info.meta ? info.meta.desc : '')
          }
        },
        cancel: () => {
          this.drawerConf.visible = false
          if (this.drawerConf.type === drawerType.node) {
            this.$refs.nodeSetting.clearValidate()
          } else {
            this.$refs.linkSetting.clearValidate()
          }
        }
      },
      linkSetting: {
        desc: ''
      },
      nodeSetting: {
        name: '',
        desc: ''
      },

      dragConf: {
        isDown: false,
        isMove: false,
        offsetTop: 0,
        offsetLeft: 0,
        clientX: 0,
        clientY: 0,
        ele: null,
        info: null
      },
      nodeItemList: [
        {
          label: 'start',
          value: () => ({
            width: 120,
            height: 40,
            meta: {
              label: 'start',
              name: 'start',
              type: 'start'
            }
          })
        },
        {
          label: 'process',
          value: () => ({
            width: 200,
            height: 40,
            meta: {
              label: 'process',
              name: 'process',
              type: 'process'
            }
          })
        },
        {
          label: 'if',
          value: () => ({
            width: 168,
            height: 168,
            meta: {
              label: 'if',
              name: 'if',
              type: 'if'
            }
          })
        },
        {
          label: 'end',
          value: () => ({
            width: 120,
            height: 40,
            meta: {
              label: 'end',
              name: 'end',
              type: 'end'
            }
          })
        }
      ],
      graphMenu: [
        [
          {
            // 选项 label
            label: 'start',
            // 选项是否禁用
            disable (graph) {
              return !!graph.nodeList.find(node => node.meta.label === '1')
            },
            // 选项选中后回调函数
            selected (graph, coordinate) {
              graph.addNode({
                width: 120,
                height: 40,
                coordinate,
                meta: {
                  label: 'start',
                  name: 'start',
                  type: 'start'
                }
              })
            }
          },
          {
            label: 'process',
            selected (graph, coordinate) {
              graph.addNode({
                width: 200,
                height: 40,
                coordinate,
                meta: {
                  label: 'process',
                  name: 'process',
                  type: 'process'
                }
              })
            }
          },
          {
            label: 'if',
            selected (graph, coordinate) {
              graph.addNode({
                width: 168,
                height: 168,
                coordinate,
                meta: {
                  label: 'if',
                  name: 'if',
                  type: 'if'
                }
              })
            }
          }
        ],
        [
          {
            label: 'end',
            selected (graph, coordinate) {
              graph.addNode({
                width: 120,
                height: 40,
                coordinate,
                meta: {
                  label: 'end',
                  name: 'end',
                  type: 'end'
                }
              })
            }
          }
        ],
        [
          {
            label: 'select all',
            selected: graph => {
              graph.selectAll()
            }
          }
        ]
      ],
      nodeMenu: [
        [
          {
            label: 'delete',
            selected: node => {
              node.remove()
            }
          },
          {
            label: 'edit',
            selected: node => {
              this.drawerConf.open(drawerType.node, node)
            }
          }
        ]
      ],
      linkMenu: [
        [
          {
            label: 'delete',
            selected: link => {
              link.remove()
            }
          },
          {
            label: 'edit',
            selected: link => {
              this.drawerConf.open(drawerType.link, link)
            }
          }
        ]
      ],

      linkBaseStyle: {
        color: '#666666', // line 颜色
        hover: '#FF0000', // line hover 的颜色
        textColor: '#666666', // line 描述文字颜色
        textHover: '#FF0000', // line 描述文字 hover 颜色
        font: '14px Arial', // line 描述文字 字体设置 参考 canvas font
        dotted: false, // 是否是虚线
        lineDash: [4, 4], // 虚线时生效，虚线长度和间隔长度
        background: 'rgba(255,255,255,0.6)' // 描述文字背景色
      },
      fontList: [
        '14px Arial',
        'italic small-caps bold 12px arial'
      ]
    }
  },
  mounted () {
    document.addEventListener('mousemove', this.docMousemove)
    document.addEventListener('mouseup', this.docMouseup)
    this.$once('hook:beforeDestroy', () => {
      document.removeEventListener('mousemove', this.docMousemove)
      document.removeEventListener('mouseup', this.docMouseup)
    })
  },
  methods: {
    flowNodeClick () {
      // console.log(this.$refs.superFlow.graph)
      // const data = this.$refs.superFlow.toJSON()
      // console.log(data)
    },
    toJSON (data) {
      // console.log(data)
    },
    saveFlow () {
      this.nodeList = this.$refs.superFlow.toJSON().nodeList
      this.linkList = this.$refs.superFlow.toJSON().linkList
    },
    linkStyle (link) {
      if (link.meta && link.meta.desc === '1') {
        return {
          color: 'red',
          hover: '#FF00FF',
          dotted: true
        }
      } else {
        return {}
      }
    },
    linkDesc (link) {
      return link.meta ? link.meta.desc : ''
    },
    settingSubmit () {
      const conf = this.drawerConf
      if (this.drawerConf.type === drawerType.node) {
        if (!conf.info.meta) conf.info.meta = {}
        Object.keys(this.nodeSetting).forEach(key => {
          this.$set(conf.info.meta, key, this.nodeSetting[key])
        })
        this.$refs.nodeSetting.resetFields()
      } else {
        if (!conf.info.meta) conf.info.meta = {}
        Object.keys(this.linkSetting).forEach(key => {
          this.$set(conf.info.meta, key, this.linkSetting[key])
        })
        this.$refs.linkSetting.resetFields()
      }
      conf.visible = false
    },
    nodeMouseUp (evt) {
      evt.preventDefault()
    },
    nodeClick () {
      // console.log(arguments)
    },
    docMousemove ({ clientX, clientY }) {
      const conf = this.dragConf
      if (conf.isMove) {
        conf.ele.style.top = clientY - conf.offsetTop + 'px'
        conf.ele.style.left = clientX - conf.offsetLeft + 'px'
      } else if (conf.isDown) {
        // 鼠标移动量大于 5 时 移动状态生效
        conf.isMove = Math.abs(clientX - conf.clientX) > 5 || Math.abs(clientY - conf.clientY) > 5
      }
    },
    docMouseup ({ clientX, clientY }) {
      const conf = this.dragConf
      conf.isDown = false

      if (conf.isMove) {
        const {
          top,
          right,
          bottom,
          left
        } = this.$refs.flowContainer.getBoundingClientRect()

        // 判断鼠标是否进入 flow container
        if (
          clientX > left && clientX < right && clientY > top && clientY < bottom
        ) {
          // 获取拖动元素左上角相对 super flow 区域原点坐标
          const coordinate = this.$refs.superFlow.getMouseCoordinate(
            clientX - conf.offsetLeft,
            clientY - conf.offsetTop
          )
          // 添加节点
          this.$refs.superFlow.addNode({
            coordinate,
            ...conf.info
          })
        }
        conf.isMove = false
      }
      if (conf.ele) {
        conf.ele.remove()
        conf.ele = null
      }
    },
    nodeItemMouseDown (evt, infoFun) {
      const {
        clientX,
        clientY,
        currentTarget
      } = evt

      const {
        top,
        left
      } = evt.currentTarget.getBoundingClientRect()

      const conf = this.dragConf
      const ele = currentTarget.cloneNode(true)

      Object.assign(this.dragConf, {
        offsetLeft: clientX - left,
        offsetTop: clientY - top,
        clientX: clientX,
        clientY: clientY,
        info: infoFun(),
        ele,
        isDown: true
      })

      ele.style.position = 'fixed'
      ele.style.margin = '0'
      ele.style.top = clientY - conf.offsetTop + 'px'
      ele.style.left = clientX - conf.offsetLeft + 'px'

      this.$el.appendChild(this.dragConf.ele)
    }
  }
}
</script>

<style lang="scss" scoped>
.loan-work-queue {
  width: 100%;
  height: calc(100vh - 166px);
  box-shadow: 0px 3px 1px -2px rgb(0 0 0 / 20%), 0px 2px 2px 0px rgb(0 0 0 / 14%), 0px 1px 5px 0px rgb(0 0 0 / 12%);
  margin: 10px;
  padding: 0;
  background: #fff;
  overflow: hidden;
}
.style-title {
  margin-bottom: 20px;
}

.ellipsis {
  white-space   : nowrap;
  text-overflow : ellipsis;
  overflow      : hidden;
  word-wrap     : break-word;
}
.link-base-style-form {
  .el-form-item {
    margin-bottom : 12px;
  }
  padding-top : 30px;
  // border-bottom  : 1px solid #DCDCDC;
}
.super-flow-demo1 {
  margin-top       : 20px;
  width            : 100%;
  height           : 732px;
  background-color : #f5f5f5;

  > .node-container {
    width            : 200px;
    float            : left;
    height           : 100%;
    text-align       : center;
    background-color : #FFFFFF;
  }
  > .flow-container {
    width    : calc(100% - 200px);
    float    : left;
    height   : 100%;
    overflow : hidden;
    position: relative;
  }
  .saveIcon {
    position: absolute;
    right: 10px;
    bottom: 10px;
  }
  .super-flow__node {
    .flow-node {
      box-sizing  : border-box;
      width       : 100%;
      height      : 100%;
      line-height : 40px;
      padding     : 0 6px;
      font-size   : 16px;
      color: #fff;
      font-weight: bold;
      .node-content {
        text-align: center;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        padding-left: 3%;
      }
    }
  }
  /*开始节点样式*/
  .ellipsis.flow-node-start {
    // background: #55ABFC;
    background: #6bc76a;
    border-radius: 10px;
    border: 1px solid #b4b4b4;
  }
  /*流程节点样式*/
  .ellipsis.flow-node-process {
    position: relative;
    // background: #30B95C;
    background: #b6c6e7;
    border: 1px solid #b4b4b4;
  }
  /*条件节点样式*/
  .ellipsis.flow-node-if {
    width: 120px;
    height: 120px;
    position: relative;
    top: 24px;
    left: 24px;
    // background: #BC1D16;
    background: #b6e3e7;
    border: 1px solid #b4b4b4;
    transform: rotateZ(45deg); //倾斜
    .node-content {
      position: absolute;
      top: 50%;
      left: 20px;
      width: 100%;
      transform: rotateZ(-45deg) translateY(-75%);
    }
  }
  /*结束节点样式*/
  .ellipsis.flow-node-end {
    // background: #000;
    background: #299999;
    border-radius: 10px;
    border: 1px solid #b4b4b4;
  }
}
.node-item {
  font-size         : 14px;
  display           : inline-block;
  height            : 30px;
  width             : 120px;
  margin-top        : 20px;
  background-color  : #FFFFFF;
  line-height       : 30px;
  box-shadow        : 1px 1px 4px rgba(0, 0, 0, 0.3);
  cursor            : pointer;
  user-select       : none;
  text-align        : center;
  z-index           : 6;
  &:hover {
    box-shadow : 1px 1px 8px rgba(0, 0, 0, 0.4);
  }
}
</style>
<style>
.link-base-style-form .el-form-item__label {
  text-align: left;
  margin-left: 20px;
}
.link-base-style-form {
  border: none;
}
.super-flow-demo1 .super-flow__node {
  border: none;
  background: none;
  box-shadow: none;
}
</style>