## flow-topology-vue3 是一个用于创建流拓扑图的 Vue 3 组件库, 导出 Topology、TemplateWrapper、AnchorWrapper 组件。

### 示例图：

![示例](https://i-blog.csdnimg.cn/direct/b2b0b44ed2c74f74a19690eb921a50b9.jpeg)

### 留言板：

[留言板](https://blog.csdn.net/qq_40040585/article/details/148478175?sharetype=blogdetail&sharerId=148478175&sharerefer=PC&sharesource=qq_40040585&spm=1011.2480.3001.8118)

### 特性

- 纯 div + svg 实现，无依赖。
- 支持拖拽节点、连线。
- 支持自定义节点样式和锚点（分支）样式。
- 模板化节点开发（通过 TemplateWrapper）。
- 支持全选、放大、缩小、截图。
- 支持锚点（分支）连接多个节点。

### 环境

- Vue3
- Node.js 18.x+（兼容更高版本）

## 安装

```bash
npm install flow-topology-vue3
```

## 使用

- 全局引入

```js
<!-- main.ts -->
import { createApp } from 'vue'
import App from './App.vue'
import FlowTopologyVue3 from 'flow-topology-vue3'
import 'flow-topology-vue3/dist/flow-topology-vue3.css'
const app = createApp(App)
app.use(FlowTopologyVue3)
app.mount('#app')
```

- 按需引入

```js
<!-- page.vue -->
<template>
  <div class="contianer">
    <Topology v-model="nodes"></Topology>
    <div class="quick-elements">
      <TemplateWrapper v-for="item in templateNode" :key="item.id" :generator="item">
        <div class="quick-element">{{ item.title }}</div>
      </TemplateWrapper>
    </div>
  </div>
</template>
<script setup>
import { Topology, TemplateWrapper, AnchorWrapper } from 'flow-topology-vue3'
import 'flow-topology-vue3/dist/flow-topology-vue3.css'
const nodes = ref([])
</script>
```

- 自动引入

```js
npm install unplugin-vue-components -D
```

```js
// vite.config.js
import { defineConfig } from 'vite'
import Components from 'unplugin-vue-components/vite'
import { FlowTopologyVue3Resolver } from 'flow-topology-vue3/dist/flow-topology-vue3.es.js'

export default defineConfig({
  plugins: [
    Components({
      resolvers: [FlowTopologyVue3Resolver()]
    })
  ]
})


<!-- page.vue -->
<template>
  <div class="contianer">
    <Topology v-model="nodes"></Topology>
    <div class="quick-elements">
      <TemplateWrapper v-for="item in templateNode" :key="item.id" :generator="item">
        <div class="quick-element">{{ item.title }}</div>
      </TemplateWrapper>
    </div>
  </div>
</template>
<script setup>
import 'flow-topology-vue3/dist/flow-topology-vue3.css'
const nodes = ref([])
</script>
```

### 数据据类型

<table>
  <thead>
    <tr>
      <th>类型名称</th>
      <th>值</th>
      <th>说明</th>
    </tr>
  </thead>
 <tbody>
    <tr>
      <td>Ftv3BranchVO</td>
      <td>
        {
    id: string | number,
    label: string,
    to?: (string | number)[],
  }
      </td>
      <td>
        分支数据类型，用于定义节点的分支信息。
      </td>
    </tr>
    <tr>
      <td>Ftv3LineVO</td>
      <td>{
id: string | number
label: string
to?: Array<number | string>
}

</td>
<td>
连线数据类型，用于定义节点之间的连接线信息。
</td>
</tr>
<tr>
      <td>Ftv3NodeVO</td>
      <td>
          {
    id: string | number,
    position: {
    x: number,
    y: number,
  },
    canDrag?: boolean,
    title?: string,
    content?: string,
    width?: number,
    branches: Ftv3LineVO[],
    [prop: string]: any,
  }
      </td>
      <td>
        节点数据类型，用于定义节点的位置、大小、分支等信息。
      </td>
    </tr>
  </tbody>
</table>

```
import { Ftv3NodeVO, Ftv3BranchVO, Ftv3LineVO } from 'flow-topology-vue3'

```

### 组件

#### Topology

主流程图组件

- 属性
<table>
  <thead>
    <tr>
      <th>参数</th>
      <th>类型</th>
      <th>是否必需</th>
      <th>默认值</th>
      <th>说明</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>v-model/model-value</td>
      <td>Array as PropType<{
    id: string | number,
    position: {
    x: number,
    y: number,
  },
    canDrag?: boolean,
    title?: string,
    content?: string,
    width?: number,
    branches: {
    id: string | number,
    label: string,
    to?: (string | number)[],
  }[],
    [prop: string]: any,
  }[]></td>
      <td>是</td>
      <td>[]</td>
      <td>所有节点和连线数据</td>
    </tr>
    <tr>
      <td>containerWidth</td>
      <td>[Number, String]</td>
      <td>否</td>
      <td>100%</td>
      <td>画布外容器宽度 支持数字 px % 等</td>
    </tr>
    <tr>
      <td>containerHeight</td>
      <td>[Number, String]</td>
      <td>否</td>
      <td>100vh</td>
      <td>画布外容器高度 支持数字 px % 等</td>
    </tr>
    <tr>
      <td>containerBackgroundColor</td>
      <td>String</td>
      <td>否</td>
      <td>#f9f9f9</td>
      <td>画布外容器背景</td>
    </tr>
    <tr>
      <td>canvasWidth</td>
      <td>Number </td>
      <td>否</td>
      <td>100vh</td>
      <td>画布宽度 仅支持数字</td>
    </tr>
    <tr>
      <td>canvasHeight</td>
      <td>Number </td>
      <td>否</td>
      <td>100vh</td>
      <td>画布高度 仅支持数字</td>
    </tr>
    <tr>
      <td>showGridPattern</td>
      <td>Boolean </td>
      <td>否</td>
      <td>true</td>
      <td>是否显示网格</td>
    </tr>
    <tr>
      <td>gridPatternColor</td>
      <td>String </td>
      <td>否</td>
      <td>#e5e5e5</td>
      <td>网格线颜色</td>
    </tr>
    <tr>
      <td>gridPatternGap</td>
      <td>Number </td>
      <td>否</td>
      <td>20</td>
      <td>网格大小</td>
    </tr>
    <tr>
      <td>showToolsBar</td>
      <td>Boolean </td>
      <td>否</td>
      <td>true</td>
      <td>是否显示工具栏</td>
    </tr>
    <tr>
      <td>toolsBarList</td>
      <td>Array as PropType<{
  ViewCenter = 'viewCenter',
  ToggleSelect = 'toggleSelect',
  Zoom = 'zoom',
  Capture = 'capture'
}[]></td>
      <td>否</td>
      <td>['viewCenter', 'toggleSelect', 'zoom', 'capture']</td>
      <td>工具栏种类(定位中心、全选/反选、缩放、截图)</td>
    </tr>
    <tr>
      <td>toolsBarPosition</td>
      <td>String as PropType<{
  Top = 'top',
  TopStart = 'top-start',
  TopEnd = 'top-end',
  Bottom = 'bottom',
  BottomStart = 'bottom-start',
  BottomEnd = 'bottom-end',
  Left = 'left',
  Right = 'right'
}></td>
      <td>否</td>
      <td>bottom-end</td>
      <td>工具栏位置</td>
    </tr>
    <tr>
      <td>toolsBarPositionOffset</td>
      <td>Number</td>
      <td>否</td>
      <td>20</td>
      <td>工具栏距离容器边距位置</td>
    </tr>
    <tr>
      <td>readOnly</td>
      <td>Boolean</td>
      <td>否</td>
      <td>false</td>
      <td>是否只读</td>
    </tr>
    <tr>
      <td>beforeDeleteLine</td>
      <td> Function as PropType<(line: {
    fromNodeId: string | number
    fromBranchId: string | number
    toNodeId: string | number
  }) => boolean | Promise<boolean>></td>
      <td>否</td>
      <td>() => true</td>
      <td>
        删除连线前的钩子，参数是删除的线 若返回false时或者Promise.reject()阻止删除
      </td>
    </tr>
    <tr>
      <td>beforeDeleteNode</td>
      <td> Function as PropType<(node: {
    id: string | number,
    position: {
    x: number,
    y: number,
  },
    canDrag?: boolean,
    title?: string,
    content?: string,
    width?: number,
    branches: {
    id: string | number,
    label: string,
    to?: string | number,
  }[],
    [prop: string]: any,
   }) => boolean | Promise<boolean>></td>
      <td>否</td>
      <td>() => true</td>
      <td>
        删除节点前的钩子，参数是删除的节点，若返回false时或者Promise.reject()阻止删除
      </td>
    </tr>
    <tr>
      <td>beforeDeleteAllNode</td>
      <td> Function as PropType<() => boolean | Promise<boolean>></td>
      <td>否</td>
      <td>() => true</td>
      <td>
        删除所有节点前的钩子，若返回false时或者Promise.reject()阻止删除
      </td>
    </tr>
    <tr>
      <td>renderItem</td>
      <td> Function as PropType<(nodeVO: NodeVO) => any></td>
      <td>否</td>
      <td>null</td>
      <td>
        自定义函数渲染节点内容，参数是节点数据对象，返回自定义渲染内容
      </td>
    </tr>
    <tr>
      <td>captureBackgroundColor</td>
      <td> String </td>
      <td>否</td>
      <td>容器背景色</td>
      <td>
        截图背景色， 若不设置则使用容器背景色
      </td>
    </tr>
    <tr>
      <td>canConnectMultiLines</td>
      <td> Boolean </td>
      <td>否</td>
      <td>false</td>
      <td>
        是否允许多条连线， 若为true则连线时一个锚点（分支）支持多个连线， 若为false则连线时一个锚点（分支）只支持一条连线
      </td>
    </tr>
  </tbody>
</table>

- 事件
<table>
  <thead>
    <tr>
      <th>事件名</th>
      <th>参数</th>
      <th>说明</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>change</td>
      <th>{ type: 'add_node' | 'delete_node' | 'update_node_position' | 'add_line' | 'delete_line' | 'delete_node_line' , data: any}</th>
      <td>节点和线改变，参数为响应操作的数据，tips：删除接点和连接线请使用键盘delete键</td>
    </tr>
    <tr>
      <td>selectNode</td>
      <th>NodeVO</th>
      <td>选中节点，参数为选中的节点数据</td>
    </tr>
    <tr>
      <td>capture</td>
      <th>string</th>
      <td>截图， 参数为base64</td>
    </tr>
  </tbody>
</table>

- 插槽
  默认插槽用于自定义渲染节点内容，可通过插槽参数获取到当前节点的数据；

- 使用方法

```html
<Topology
  v-model="nodes"
>
  <!--
   1、 插槽用于自定义渲染节点内容，可通过插槽参数获取到当前节点的数据；
   2、 可通过renderItem渲染；
   3、 插槽优先级高于renderItem；
   4、 不使用插槽或者renderItem有节点内容渲染；
   <template #default="{ node }">
    <template v-if="node.branches && node.branches.length">
      <AnchorWrapper v-for="branch in node.branches" :key="branch.id" :node="node" :branch="branch">
        <span>{{ branch.label }}</span>
      </AnchorWrapper>
    </template>
  </template> -->
</Topology>

</>
```

#### TemplateWrapper

TemplateWrapper 组件用于包裹模板内容，并提供插槽供自定义渲染。

- 属性

- 插槽
默认插槽用于自定义渲染模板内容。
<table>
  <thead>
    <tr>
      <th>参数</th>
      <th>类型</th>
      <th>是否必需</th>
      <th>默认值</th>
      <th>说明</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>generator</td>
      <td>{
    id: string | number,
    position: {
    x: number,
    y: number,
  },
    canDrag?: boolean,
    title?: string,
    content?: string,
    width?: number,
    branches: {
    id: string | number,
    label: string,
    to?: string | number,
  }[],
    [prop: string]: any,
   }</td>
      <td>是</td>
      <td>-</td>
      <td>节点的数据</td>
    </tr>
    <tr>
      <td>disabled</td>
      <td>Boolean</td>
      <td>否</td>
      <td>false</td>
      <td>是否允许拖拽</td>
    </tr>
  </tbody>
</table>

- 使用方法
  - 模版中使用
  ```html
  <div class="quick-elements">
    <TemplateWrapper v-for="item in templateNode" :key="item.id" :generator="item">
      <div class="quick-element">{{ item.title }}</div>
    </TemplateWrapper>
  </div>
  ```
  - h 函数渲染
  ```js
  h(
    'div',
    {...你的属性...},
    templateNode.branches.map(t => {
      return h(
        TemplateWrapper,
        {
          generator: t,
          disabled: t.disabled,
        },
        [
          h('div', { class: 'quick-element' }, t.title)
        ]
      )
    })
  )
  ```

#### AnchorWrapper

AnchorWrapper 组件用于包裹锚点内容，并提供插槽供自定义渲染。

- 属性

<table>
  <thead>
    <tr>
      <th>参数</th>
      <th>类型</th>
      <th>是否必需</th>
      <th>默认值</th>
      <th>说明</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>node</td>
      <td>{
    id: string | number,
    position: {
    x: number,
    y: number,
  },
    canDrag?: boolean,
    title?: string,
    content?: string,
    width?: number,
    branches: {
    id: string | number,
    label: string,
    to?: string | number,
  }[],
    [prop: string]: any,
   }</td>
      <td>是</td>
      <td>-</td>
      <td>节点的数据</td>
    </tr>
    <tr>
      <td>branch</td>
      <td> {
    id: string | number
    label: string
    to?: string | number
  }</td>
      <td>是</td>
      <td></td>
      <td>当前节点分支</td>
    </tr>
  </tbody>
</table>

- 插槽
  默认插槽用于自定义渲染锚点内容。

- 使用方法

  - 模版中使用

  ```html
  <AnchorWrapper v-for="branch in node.branches" :key="branch.id" :node="node" :branch="branch">
    <span>{{ branch.label }}</span>
  </AnchorWrapper>
  ```

  - h 函数渲染

  ```js
  h(
    'div',
    {...你的属性...},
    node.branches.map(branch => {
      return h(
        AnchorWrapper,
        {
          class: `topo-branch ${!branch.to ? 'free' : ''}`,
          node: toRaw(node),
          branch: toRaw(branch)
        },
        () => branch.label
      )
    })
  )
  ```

### 组件实例的方法

<table>
 <thead>
    <tr>
      <th>方法名</th>
      <th>参数</th>
      <th>说明</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>selectNode</td>
      <td>id:string | number</td>
      <td>选中节点</td>
    </tr>
    <tr>
      <td>deleteNode</td>
      <td>id:string | number</td>
      <td>删除单个节点</td>
    </tr>
    <tr>
      <td>deleteAllNode</td>
      <td>-</td>
      <td>删除所有节点</td>
    </tr>
  </tbody>
</table>

使用示例

```js
const handleDel = () => {
  topologyRef.value.deleteNode('48da386a-016a-4e49-a26f-f0dfec0d3880')
}

const handleDelAll = () => {
  topologyRef.value.deleteAllNode()
}

const handleSelect = () => {
  topologyRef.value.selectNode('500e4096-78a8-465b-b0f3-e748cf5716b3')
}
```

### DEMO

```js
<template>
  <div class="contianer">
    <Topology
      v-model="nodes"
      :beforeDeleteLine="beforeDeleteLine"
      :beforeDeleteAllNode="onBeforeDeleteAllNode"
      @capture="onCapture"
      ref="topologyRef"
    >
      <!-- <template #default="{ node }">
        {{ node }}
        <template v-if="node.branches && node.branches.length">
          <AnchorWrapper v-for="branch in node.branches" :node="node" :branch="branch">
            <span>{{ branch.label }}</span>
          </AnchorWrapper>
        </template>
      </template> -->
    </Topology>
    <div class="quick-elements">
      <TemplateWrapper v-for="item in templateNode" :key="item.id" :generator="item">
        <div class="quick-element">{{ item.title }}</div>
      </TemplateWrapper>
    </div>
    <div style="position: fixed; top: 0; left: 50%; transform: translateX(-50%); z-index: 1000">
      <button @click="handleDel">删除节点</button>

      <button @click="handleDelAll">删除全部节点</button>

      <button @click="handleSelect">选中节点</button>
    </div>
  </div>
</template>
<script setup lang="ts">
import { ref, h, toRaw } from 'vue'
import { Topology, TemplateWrapper, AnchorWrapper } from 'flow-topology-vue3'
import 'flow-topology-vue3/dist/flow-topology-vue3.css'
import { Ftv3NodeVO, Ftv3BranchVO, Ftv3LineVO } from 'flow-topology-vue3'
const topologyRef = ref(null)
const nodes = ref<Ftv3NodeVO[]>([
  {
    id: 'bb80fa18-6a4a-49fd-9d33-a7f414a58b6a',
    title: '开始节点',
    score: 0,
    status: '待录音',
    content: '这是开始节点的内容',
    type: 1,
    position: { x: 4905, y: 4645 },
    canDrag: false,
    branches: [
      { id: '2c3602cc-609b-4246-a2c6-d7f19a418368', label: '默认', to: ['46ca30d5-b9cd-48e3-9814-497aab383e0d'] }
    ]
  },
  {
    id: '46ca30d5-b9cd-48e3-9814-497aab383e0d',
    title: '开场白',
    score: 0,
    status: '待录音',
    content: '您好，请问有什么可以帮助你吗？',
    type: 1,
    position: { x: 4899, y: 4804 },
    canDrag: true,
    branches: [
      { id: '53419a2f-5141-4fb2-9134-0a0986e88268', label: '默认', to: ['500e4096-78a8-465b-b0f3-e748cf5716b3'] },
      { id: 'cc9bd42c-11b0-46be-9910-5e121c6bf18c', label: '需要', to: ['500e4096-78a8-465b-b0f3-e748cf5716b3'] },
      { id: '07aead90-fd4f-4a4b-a889-d191819aef9b', label: '不需要', to: ['82009f5b-28fd-4514-a52e-41293823ca0d'] }
    ]
  },
  {
    id: '500e4096-78a8-465b-b0f3-e748cf5716b3',
    title: '了解退保原因',
    score: 0,
    status: '待录音',
    content: '我要退保，请问您是因为什么要退保呢？',
    type: 1,
    position: { x: 4662, y: 5045 },
    canDrag: true,
    branches: [
      { id: 'e1b45c8c-6d7c-4b2c-b90c-3a1e155b4b82', label: '默认', to: ['48da386a-016a-4e49-a26f-f0dfec0d3880'] }
    ]
  },
  {
    id: '48da386a-016a-4e49-a26f-f0dfec0d3880',
    title: '跳转节点',
    score: 0,
    status: '待录音',
    content: '好的，退保',
    type: 1,
    position: { x: 4652, y: 5210 },
    canDrag: true,
    branches: [{ id: '82009f5b-28fd-4514-a52e-41293823ca0d', label: '默认' }]
  },
  {
    id: '82009f5b-28fd-4514-a52e-41293823ca0d',
    title: '结束节点',
    score: 0,
    status: '待录音',
    content: '挂断啦',
    type: 1,
    position: { x: 5029, y: 5047 },
    canDrag: true,
    branches: null
  }
])

const templateNode: Array<Ftv3NodeVO> = [
  {
    id: '',
    title: '开始节点',
    score: 0,
    status: '待录音',
    content: 'sdfasfasfasdfasdfasdfasdfasdfsadf',
    type: 1,
    position: {
      x: 0,
      y: 0
    },
    canDrag: true,
    branches: [{ id: '', label: '默认' }]
  },
  {
    id: '',
    title: '跳转节点',
    score: 0,
    status: '待录音',
    content: '',
    type: 1,
    position: {
      x: 0,
      y: 0
    },
    canDrag: true,
    branches: [
      { id: '', label: '默认' },
      { id: '', label: '分支1' },
      { id: '', label: '分支2' }
    ]
  },
  {
    id: '',
    title: '结束节点',
    score: 0,
    status: '待录音',
    content: 'sdfasfasfasdfasdfasdfasdfasdfsadf',
    type: 1,
    position: {
      x: 0,
      y: 0
    },
    canDrag: true,
    branches: null
  }
]

const beforeDeleteLine = (line: Ftv3LineVO) => {
  return new Promise((resolve, reject) => {
    resolve(confirm('你确定要删除这条线吗？'))
  })
}

const beforeDeleteNode = (node: Ftv3NodeVO) => {
  return Promise.resolve(confirm('你确定要删除这个节点吗？'))
}

const onBeforeDeleteAllNode = () => {
  return Promise.resolve(confirm('你确定要删除所有节点吗？'))
}

const renderItem = (node: Ftv3NodeVO) => {
  return h('div', { style: 'color: red;' }, [
    h('div', {}, node.title),
    h('div', {}, node.content),
    h(
      'div',
      {},
      node.branches.map(branch => {
        return h(
          AnchorWrapper,
          {
            class: `topo-branch ${!branch.to ? 'free' : ''}`,
            node: toRaw(node),
            branch: toRaw(branch)
          },
          () => branch.label
        )
      })
    )
  ])
}

const handleDel = () => {
  topologyRef.value.deleteNode('48da386a-016a-4e49-a26f-f0dfec0d3880')
}

const handleDelAll = () => {
  topologyRef.value.deleteAllNode()
}

const handleSelect = () => {
  topologyRef.value.selectNode('500e4096-78a8-465b-b0f3-e748cf5716b3')
}

const onCapture = img => {}
</script>
<style>
body {
  overflow: hidden;
}
</style>
<style scoped>
.contianer {
  overflow: hidden;
}

.quick-elements {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 17px;
}

.quick-element {
  padding: 8px 12px;
  background-color: #f0f8ff;
  border: 1px dashed #0066cc;
  border-radius: 4px;
  cursor: grab;
  user-select: none;
}

.quick-element:active {
  cursor: grabbing;
}
</style>
```