Vue D3 力导向图

1. 安装

前端工程根目录下执行 yarn add d3 ，安装 d3 依赖包。安装的版本 "d3": "^5.7.0"

2. vue 文件中引入 d3

import * as d3 from ‘d3‘

例如一个基础的 d3.vue 文件内容，包含基本的 <template> <script> <style>

<template>
  <div>
    <svg width="960" height="600"></svg>
  </div>
</template>
<script>
import * as d3 from ‘d3‘
export default {
  data () {
    return {
    }
  }
}
</script>
<style scoped></style>

3.设置一个力导向图的基本骨架，添加了控制节点和线条的 css

注意： .link line .node circle 节点和线条的样式不能写在 <style scoped></style> 中，因为 d3 数据是动态渲染的，scoped 中的样式无法控制动态生成的 dom

<script>
import * as d3 from ‘d3‘
export default {
  data () {
    return {
    }
  },
  mounted () {
    let svg = d3.select(‘svg‘)
    let width = +svg.attr(‘width‘)
    let height = +svg.attr(‘height‘)
  },
  methods: {
   
  }
}
</script>
<style scoped>
svg {
  border: 1px solid #ccc;
}
</style>
<style>
.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}
.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}
</style>

添加节点数据

    let nodesData = [
      { ‘name‘: ‘Lillian‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Gordon‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Sylvester‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Mary‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Helen‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Jamie‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Jessie‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Ashton‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Duncan‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Evette‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Mauer‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Fray‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Duke‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Baron‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Infante‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Percy‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Cynthia‘, ‘sex‘: ‘F‘ }
    ]

使用节点数据设置模拟器

   let simulation = d3.forceSimulation().nodes(nodesData)

添加定心力和充电力

    simulation
      .force(‘charge_force‘, d3.forceManyBody())
      .force(‘center_force‘, d3.forceCenter(width / 2, height / 2))

在svg元素中绘制圆圈

    let node = svg.append(‘g‘)
      .attr(‘class‘, ‘nodes‘)
      .selectAll(‘circle‘)
      .data(nodesData)
      .enter()
      .append(‘circle‘)
      .attr(‘r‘, 10)
      .attr(‘fill‘, this.circleColor)

methods 中添加 circleColor 函数

    circleColor (d) {
      if (d.sex === ‘M‘) {
        return ‘blue‘
      } else {
        return ‘pink‘
      }
    },

每次作出举动时需要更新节点位置

    simulation.on(‘tick‘, tickAction)

    function tickAction () {
      node
        .attr(‘cx‘, (d) => { return d.x })
        .attr(‘cy‘, (d) => { return d.y })
    }

现在图上已经有一些圆圈了,如下效果

 

 

添加连线，指定链接数据

    let linksData = [
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Lillian‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Mary‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Helen‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Helen‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Mary‘, ‘target‘: ‘Lillian‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Ashton‘, ‘target‘: ‘Mary‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duncan‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Gordon‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Fray‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Mauer‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Cynthia‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Percy‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Percy‘, ‘target‘: ‘Cynthia‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Infante‘, ‘target‘: ‘Duke‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duke‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duke‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Baron‘, ‘target‘: ‘Duke‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Baron‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Evette‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Cynthia‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Cynthia‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Mauer‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘E‘ }
    ]

创建链接力

    let linkForce = d3.forceLink(linksData)
      .id((d) => { return d.name })

把链接力添加到模拟器中

  simulation.force(‘links‘, linkForce)

在页面绘制链接

    let link = svg.append(‘g‘)
      .attr(‘class‘, ‘links‘)
      .selectAll(‘line‘)
      .data(linksData)
      .enter()
      .append(‘line‘)
      .attr(‘stroke-width‘, 2)
      .style(‘stroke‘, this.linkColor)

methods 中添加 linkColor 函数

    linkColor (d) {
      if (d.type === ‘A‘) {
        return ‘green‘
      } else {
        return ‘red‘
      }
    }

在 tickAction 函数中更新链接位置

      link
        .attr(‘x1‘, (d) => { return d.source.x })
        .attr(‘y1‘, (d) => { return d.source.y })
        .attr(‘x2‘, (d) => { return d.target.x })
        .attr(‘y2‘, (d) => { return d.target.y })

目前就实现了一个简单的力导向图

 

 

d3.vue 完整代码如下

<template>
  <div>
    <h1>Knowledge Graph</h1>
    <svg width="960" height="600"></svg>
  </div>
</template>
<script>
import * as d3 from ‘d3‘
export default {
  data () {
    return {
    }
  },
  mounted () {
    let svg = d3.select(‘svg‘)
    let width = +svg.attr(‘width‘)
    let height = +svg.attr(‘height‘)

    let nodesData = [
      { ‘name‘: ‘Lillian‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Gordon‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Sylvester‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Mary‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Helen‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Jamie‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Jessie‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Ashton‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Duncan‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Evette‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Mauer‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Fray‘, ‘sex‘: ‘F‘ },
      { ‘name‘: ‘Duke‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Baron‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Infante‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Percy‘, ‘sex‘: ‘M‘ },
      { ‘name‘: ‘Cynthia‘, ‘sex‘: ‘F‘ }
    ]

    let linksData = [
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Lillian‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Mary‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Helen‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Helen‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Mary‘, ‘target‘: ‘Lillian‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Ashton‘, ‘target‘: ‘Mary‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duncan‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Gordon‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Sylvester‘, ‘target‘: ‘Fray‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Mauer‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Cynthia‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Fray‘, ‘target‘: ‘Percy‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Percy‘, ‘target‘: ‘Cynthia‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Infante‘, ‘target‘: ‘Duke‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duke‘, ‘target‘: ‘Gordon‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Duke‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Baron‘, ‘target‘: ‘Duke‘, ‘type‘: ‘A‘ },
      { ‘source‘: ‘Baron‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Evette‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Cynthia‘, ‘target‘: ‘Sylvester‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Cynthia‘, ‘target‘: ‘Jamie‘, ‘type‘: ‘E‘ },
      { ‘source‘: ‘Mauer‘, ‘target‘: ‘Jessie‘, ‘type‘: ‘E‘ }
    ]

    let simulation = d3.forceSimulation()
      .nodes(nodesData)

    simulation
      .force(‘charge_force‘, d3.forceManyBody())
      .force(‘center_force‘, d3.forceCenter(width / 2, height / 2))

    let node = svg.append(‘g‘)
      .attr(‘class‘, ‘nodes‘)
      .selectAll(‘circle‘)
      .data(nodesData)
      .enter()
      .append(‘circle‘)
      .attr(‘r‘, 10)
      .attr(‘fill‘, this.circleColor)

    simulation.on(‘tick‘, tickAction)

    function tickAction () {
      node
        .attr(‘cx‘, (d) => { return d.x })
        .attr(‘cy‘, (d) => { return d.y })

      link
        .attr(‘x1‘, (d) => { return d.source.x })
        .attr(‘y1‘, (d) => { return d.source.y })
        .attr(‘x2‘, (d) => { return d.target.x })
        .attr(‘y2‘, (d) => { return d.target.y })
    }

   let linkForce = d3.forceLink(linksData)
      .id((d) => { return d.name })

    simulation.force(‘links‘, linkForce)

    let link = svg.append(‘g‘)
      .attr(‘class‘, ‘links‘)
      .selectAll(‘line‘)
      .data(linksData)
      .enter()
      .append(‘line‘)
      .attr(‘stroke-width‘, 2)
      .style(‘stroke‘, this.linkColor)
  },
  methods: {
    circleColor (d) {
      if (d.sex === ‘M‘) {
        return ‘blue‘
      } else {
        return ‘pink‘
      }
    },
    linkColor (d) {
      if (d.type === ‘A‘) {
        return ‘green‘
      } else {
        return ‘red‘
      }
    }
  }
}
</script>
<style scoped>
svg {
  border: 1px solid #ccc;
}
</style>
<style>
.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}
.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}
</style>

GitHub

https://github.com/gywgithub/vue-d3-examples