antV G6流程图在Vue中的使用

最近我司项目中需要加入流程图制作功能，于是乎百度各种找可视化绘制拓扑图的轮子，大部分都是国外的，看文档太吃力，不过好在最终让我发现了AntV G6流程图图表库，最新版为2.0，不过编辑器在2.0版本还没有进行开源，所以只能退而求其次，使用了1.2.8版本。希望2.0版本的编辑器尽早开源，在交互方面1.2.8版本还是差了一些。

该组件并非开箱即食，需要根据自己的业务进行修改，右侧属性表单部分如果有时间考虑改为插槽形式，方便以后复用~

antd组件Upload实现自己上传

技术栈

• Vue v3.0.1
• Element-ui v2.4.5
• antV G6 v1.2.8
• Sass

效果图

引入

在index.html中进行了全局引用

<script src="./static/plugin/g6.min.js"></script>

实例代码

仿照2.0版本的编辑器将G6作为了一个组件使用，代码：

<template>
  <div id="flowChart">
    <div class="operating">
      <div class="btn-group">
        <div class="btn" @click="addCircle" title="起始节点">
          <i class="iconfont icon-circle-oeps"></i>
        </div>
        <div class="btn" @click="addRect" title="常规节点">
          <i class="iconfont icon-square-oeps"></i>
        </div>
        <div class="btn" @click="addRhombus" title="条件节点">
          <i class="iconfont icon-square-ling"></i>
        </div>
      </div>
      <div class="btn-group">
        <div class="btn" @click="addLine" title="直线">
          <i class="iconfont icon-zhixian"></i>
        </div>
        <div class="btn" @click="addSmooth" title="曲线">
          <i class="iconfont icon-quxian"></i>
        </div>
        <div class="btn" @click="addArrowLine" title="箭头直线">
          <i class="iconfont icon-jiantouzhixian"></i>
        </div>
        <div class="btn" @click="addArrowSmooth" title="箭头曲线">
          <i class="iconfont icon-jiantouquxian"></i>
        </div>
      </div>
      <div class="btn-group">
        <div class="btn" @click="changeMode('edit')" title="选择模式">
          <i class="iconfont icon-chose"></i>
        </div>
        <div class="btn" @click="changeMode('drag')" title="拖拽模式">
          <i class="iconfont icon-move"></i>
        </div>
      </div>
      <div class="btn-group">
        <div class="btn" @click="del" style="margin-top: 5px;" title="删除">
          <i class="el-icon-delete"></i>
        </div>
        <div class="btn" @click="save" title="保存">
          <i class="iconfont icon-baocun"></i>
        </div>
      </div>
      <div class="btn-group">
        <el-input size="mini" v-model="workflowName" placeholder="请输入流图名称..."></el-input>
      </div>
    </div>
    <div class="info">
      <div class="title">
        <span>{{infoTitle}}属性</span>
      </div>
      <div class="content">
        <el-checkbox v-if="isBlank === true" v-model="checked">网格对齐</el-checkbox>
        <el-form v-else label-position="left" label-width="60px">
          <el-form-item v-if="isNode !== true" label="动作">
            <el-select v-model="action" size="mini" filterable placeholder="绑定动作" value="">
              <el-option
                v-for="item in actionList"
                :key="item.id"
                :label="item.label"
                :value="item.id">
              </el-option>
            </el-select>
          </el-form-item>   <!-- 线-->
          <el-form-item v-if="isNode === true" label="名称">
            <el-input size="mini" v-model="name"></el-input>
          </el-form-item>
          <el-form-item v-if="isNode === true" label="功能">
            <el-select v-model="func" size="mini" filterable placeholder="绑定功能" value="">
              <el-option
                v-for="item in funcList"
                :key="item.id"
                :label="item.label"
                :value="item.id">
              </el-option>
            </el-select>
          </el-form-item>
          <el-form-item v-if="isNode === true" label="账号">
            <el-select v-model="account" size="mini" filterable multiple
                       collapse-tags placeholder="绑定账号" value="">
              <el-option
                v-for="item in accountList"
                :key="item.id"
                :label="item.label"
                :value="item.id">
              </el-option>
            </el-select>
          </el-form-item>
          <el-form-item v-if="isNode === true" label="流图">
            <el-select v-model="workflow" size="mini" filterable clearable placeholder="绑定流图" value="">
              <el-option
                v-for="item in workflowList"
                :key="item.id"
                :label="item.label"
                :value="item.id">
              </el-option>
            </el-select>
          </el-form-item>
          <el-form-item v-if="isNode === true" label="类型">
            <el-select v-model="nodeType" size="mini" filterable placeholder="请选择类型" value="">
              <el-option
                v-for="item in nodeTypeList"
                :key="item.id"
                :label="item.label"
                :value="item.id">
              </el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="颜色">
            <el-color-picker v-model="color"></el-color-picker>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>

<script>

  export default {
    name: "index",
    components: {},
    mounted() {
      this.initG6();
    },
    props: {
      actionList: {
        type: Array, default: []
      },
      funcList: {
        type: Array, default: []
      },
      accountList: {
        type: Array, default: []
      },
      workflowList: {
        type: Array, default: []
      },
      nodeTypeList: {
        type: Array, default: () => {
          return [
            {id: 0, label: '普通节点'},
            {id: 1, label: '入口节点'},
            {id: 2, label: '出口节点'}
          ]
        }
      }
    },
    data() {
      return {
        action: '',
        name: '',
        func: '',
        account: '',
        workflow: '',
        nodeType: 0,
        color: '',

        net: '',
        Util: '',
        workflowName: '',
        activation: '', //当前激活的节点
        isNode: false, //当前是节点
        isBlank: true,   //当前是空白区
        checked: true,  //网格对齐
        infoTitle: '画布',//属性标题
        oldColor: '',    //获取节点本身颜色
        type: '',        //有值为编辑状态
      }
    },
    methods: {
      initG6() {
        let self = this;
        self.Util = G6.Util;
        let grid;
        if (self.checked) {
          grid = {
            forceAlign: true, // 是否支持网格对齐
            cell: 25,         // 网格大小
          };
        } else {
          grid = null;
        }
        self.net = new G6.Net({
          id: 'flowChart',      // 容器ID
          mode: 'edit',
          grid: grid,
          /*width: 500,    // 画布宽*/
          height: 800    // 画布高
        });
        /*self.net.tooltip({
          title: '信息', // @type {String} 标题
          split: ':',  // @type {String} 分割符号
          dx: 0,       // @type {Number} 水平偏移
          dy: 0        // @type {Number} 竖直偏移
        });*/

        /**
         *点击空白处
         */
        self.net.on('click', (ev) => {
          if (!self.Util.isNull(ev.item)) {
            self.isBlank = false
          } else {
            self.isBlank = true;
            self.infoTitle = '画布'
          }
        });
        /**
         *点击节点
         */
        self.net.on('itemclick', function (ev) {
          self.isNode = self.Util.isNode(ev.item);   //是否为Node
          self.activation = ev.item;
          if (self.isNode) {
            /* 激活节点后节点名称input聚焦*/
            self.$nextTick(()=>{
              self.$refs.inputFocus.$el.querySelector('input').focus();
            });
            self.infoTitle = '节点';
            self.name = ev.item.get('model').label;
            self.func = ev.item.get('model').func;
            self.account = ev.item.get('model').account || [];
            self.workflow = ev.item.get('model').workflow;
            self.nodeType = ev.item.get('model').nodeType;
          } else {
            self.infoTitle = '边';
            self.action = ev.item.get('model').action;
          }
          self.color = self.oldColor;
        });
        /**
         * 鼠标移入移出事件改变颜色
         */
        self.net.on('itemmouseenter', ev => {
          const item = ev.item;
          self.oldColor = item.get('model').color;     //获取节点颜色
          self.net.update(item, {
            color: '#108EE9',
          });
          self.net.refresh();
        });
        self.net.on('itemmouseleave', ev => {
          const item = ev.item;
          self.net.update(item, {
            color: self.oldColor
          });
          self.net.refresh();
        });
        /**
         * 提示信息
         */
       /* self.net.node().tooltip(['label', 'func', 'role', 'color']);
        self.net.edge().tooltip(['label', 'color']);*/
        /**
         * 渲染
         */
        /*self.net.source(self.nodes, self.edges);*/  //加载资源数据
        self.net.render();
      },
      addCircle() {
        this.net.beginAdd('node', {
          shape: 'circle',
          nodeType: 0
        })
      },//添加起始节点
      addRect() {
        this.net.beginAdd('node', {
          shape: 'rect',
          nodeType: 0
        })
      },//添加常规节点
      addRhombus() {
        this.net.beginAdd('node', {
          shape: 'rhombus',
          nodeType: 0
        })
      }, //添加条件节点
      addLine() {
        this.net.beginAdd('edge', {
          shape: 'line'
        });
      }, //添加直线
      addSmooth() {
        this.net.beginAdd('edge', {
          shape: 'smooth'
        })
      },  //添加曲线
      addArrowSmooth() {
        this.net.beginAdd('edge', {
          shape: 'smoothArrow'
        })
      }, //添加箭头曲线
      addArrowLine() {
        this.net.beginAdd('edge', {
          shape: 'arrow'
        });
      }, //添加箭头直线
      addPolyLine() {
        this.net.beginAdd('edge', {
          shape: 'polyLineFlow'
        });
      }, //添加折线
      changeMode(mode) {
        this.net.changeMode(mode)
      }, //拖拽与编辑模式的切换
      del() {
        this.net.del()
      },//删除
      save() {
        /* 验证流图名称*/
        if (this.workflowName !== '') {
          let data = this.net.save();
          if (data.source.nodes.length === 0) {
            this.$message({type: 'error', message: '流图内容不能为空'});
            return false
          }
          /* 验证节点名称*/
          for (let item of data.source.nodes) {
            if (item.label === '' || item.label === null || item.label === undefined) {
              this.$message({type: 'error', message: '节点名称不能为空'});
              return false
            }
          }
          data.source['name'] = this.workflowName;
          /*let json = JSON.stringify(data, null, 2);*/
          this.$emit('saveData', data.source, this.type);
        } else {
          this.$message({type: 'error', message: '流图名称不能为空'})
        }
        /*console.log(saveData, json);*/
      },//保存
      update() {
        if (this.activation.get('type') === 'node') {
          this.net.update(this.activation, {
            label: this.name,
            func: this.func,
            account: this.account,
            workflow: this.workflow,
            nodeType: this.nodeType,
            color: this.color
          });
        } else {
          /* 根据ID取出label*/
          let label = this.actionList.map(item => {
            if (item.id === this.action) {
              return item.label
            }
          }).join('');
          this.net.update(this.activation, {
            label: label,
            color: this.color,
            action: this.action
          });
        }
      },  //更新节点
      clearView() {
        this.type = '';
        this.workflowName = '';
        this.net.changeData()
      },   //清空视图
      source(nodes, edges, name, type) {
        this.type = type;
        this.workflowName = name;
        this.net.changeData(nodes, edges)
      },  //更新数据
    },
    watch: {
      /**
       * 监听输入框
       */
      action: function () {
        this.update()
      },
      name: function () {
        this.update()
      },
      func: function () {
        this.update()
      },
      account: function () {
        this.update()
      },
      workflow: function () {
        this.update()
      },
      nodeType: function () {
        this.update()
      },
      color: function () {
        this.update()
      },
      /**
       * 网格切换
       */
      checked: function () {
        let _saveData = this.net.save();
        this.net.destroy();  //销毁画布
        this.initG6();
        this.net.read(_saveData);
        this.net.render()
      }
    }
  }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
  #flowChart {
    border: 1px solid #ebeef5;
    position: relative;
    overflow: hidden;
  }

  .operating {
    position: absolute;
    z-index: 99;
    background-color: #ffffff;
    padding: 20px 10px;
    box-shadow: 1px 1px 4px 0 #0a0a0a2e;
  }

  .info {
    position: absolute;
    right: 0;
    z-index: 99;
    box-shadow: 1px 1px 4px 0 #0a0a0a2e;
    .title {
      height: 40px;
      padding-left: 10px;
      border-top: 1px solid #DCE3E8;
      border-bottom: 1px solid #DCE3E8;
      border-left: 1px solid #DCE3E8;
      background: rgb(235, 238, 242);
      line-height: 40px;
      span {
        font-size: 14px;
      }
    }
    .content {
      background: rgba(247, 249, 251, 0.45);
      width: 200px;
      height: 800px;
      border-left: 1px solid #E6E9ED;
      padding: 10px;
    }
  }

  .btn-group {
    border-right: 1px solid #efefef;
    display: inline-block;
    padding-left: 10px;
    padding-right: 14px;
    &:last-of-type {
      border-right: 0;
    }
    .btn {
      display: inline-block;
      margin: 2px;
      width: 30px;
      height: 30px;
      line-height: 30px;
      text-align: center;
      cursor: pointer;
      border: 1px solid rgba(233, 233, 233, 0);
      i {
        font-size: 20px;
      }
      &:hover {
        border: 1px solid #E9E9E9;
        color: #767A85;
        border-radius: 2px;
        background: #FAFAFE;
      }
    }
    .el-form-item {
      margin-bottom: 0 !important;
    }
  }
</style>

流图属性

参数	说明	类型	可选值	默认值
actionList	动作数据	Array	——	[]
funcList	功能数据	Array	——	[]
accountList	账号数据	Array	——	[]
workflowList	流图数据	Array	——	[]
nodeTypeList	节点类型数据	Array	——	[{id: 0, label: '普通节点'},{id: 1, label: '入口节点'},{id: 2, label: '出口节点'}]

所有属性接收的数据格式需要与 nodeTypeList的默认值相同

流图事件

事件名	说明	参数
saveData	当用户手动点击保存触发事件	source,type

参数 type可为空，在此项目中主要用来区分 新建与 编辑

流图方法

方法名	说明	参数
clearView	清空当前视图	——
source	渲染数据	nodes, edges, name, type

参数 type与事件中相同，参数 name的作用是用来取流图名

参考文档

使用 G6关系图类库 开发流程图工具

旧版本G6 1.x API 文档

新版本G6 2.x API 文档

来源：https://segmentfault.com/a/1190000016445313