网络编程
位置:首页>> 网络编程>> JavaScript>> D3.js实现拓扑图的示例代码

D3.js实现拓扑图的示例代码

作者:lihualong  发布时间:2024-05-09 10:20:06 

标签:D3.js,拓扑图

最近写项目需要画出应用程序调用链的网路拓扑图,完全自己写需要花费些时间,那么首先想到的是echarts,但echarts的自定义写法写起来非常麻烦,而且它的文档都是基于配置说明的,对于自定义开发不太方便,尝试后果断放弃,改用D3.js,自己完全可控。

我们先看看效果

D3.js实现拓扑图的示例代码

我把代码分享下,供和我一样刚接触D3的同学参考,不对的地方欢迎指正!

完整代码:

html:


<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <script type="text/javascript" src="http://d3js.org/d3.v5.min.js">
 </script>
 <style>
   body{
     overflow: hidden;
   }
   #togo{
     width: 800px;
     height:500px;
     border:1px solid #ccc;
     user-select: none;
   }
   #togo text{
     font-size:10px;/*和js里保持一致*/
     fill:#1A2C3F;
     text-anchor: middle;
   }
   #togo .node-other{

text-anchor: start;
   }
   #togo .health1{
     stroke:#92E1A2;
   }
   #togo .health2{
     stroke:orange;
   }
   #togo .health3{
     stroke:red;
   }
   #togo #cloud,#togo #database{
     fill:#ccc;
   }
   #togo .link{
     stroke:#E4E8ED;
   }
   #togo .node-title{
     font-size: 14px;
   }
   #togo .node-code circle{
     fill:#3F86F5;
   }
   #togo .node-code text{
     fill:#fff;
   }
   #togo .node-bg{
     fill:#fff;
   }
   #togo .arrow{
     fill:#E4E8ED;
   }
 </style>
 <script src="data.js"></script>
</head>
<body>
<svg id="togo" width="800" height="500">

</svg>
<script src="togo.js"></script>
<script>

</script>

<script>
 let t=new Togo('#togo',__options);
 t.render();
</script>
</body>
</html>

JS:


const fontSize = 10;
const symbolSize = 40;
const padding = 10;

/*
* 调用 new Togo(svg,option).render();
* */
class Togo {
/**/
constructor(svg, option) {
 this.data = option.data;
 this.edges = option.edges;
 this.svg = d3.select(svg);

}

//主渲染方法
render() {
 this.scale = 1;
 this.width = this.svg.attr('width');
 this.height = this.svg.attr('height');
 this.container = this.svg.append('g')
 .attr('transform', 'scale(' + this.scale + ')');

this.initPosition();
 this.initDefineSymbol();
 this.initLink();
 this.initNode();
 this.initZoom();

}

//初始化节点位置
initPosition() {
 let origin = [this.width / 2, this.height / 2];
 let points = this.getVertices(origin, Math.min(this.width, this.height) * 0.3, this.data.length);
 this.data.forEach((item, i) => {
  item.x = points[i].x;
  item.y = points[i].y;
 })
}

//根据多边形获取定位点
getVertices(origin, r, n) {
 if (typeof n !== 'number') return;
 var ox = origin[0];
 var oy = origin[1];
 var angle = 360 / n;
 var i = 0;
 var points = [];
 var tempAngle = 0;
 while (i < n) {
  tempAngle = (i * angle * Math.PI) / 180;
  points.push({
   x: ox + r * Math.sin(tempAngle),
   y: oy + r * Math.cos(tempAngle),
  });
  i++;
 }
 return points;
}

//两点的中心点
getCenter(x1, y1, x2, y2) {
 return [(x1 + x2) / 2, (y1 + y2) / 2]
}

//两点的距离
getDistance(x1, y1, x2, y2) {
 return Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
}

//两点角度
getAngle(x1, y1, x2, y2) {
 var x = Math.abs(x1 - x2);
 var y = Math.abs(y1 - y2);
 var z = Math.sqrt(x * x + y * y);
 return Math.round((Math.asin(y / z) / Math.PI * 180));
}

//初始化缩放器
initZoom() {
 let self = this;
 let zoom = d3.zoom()
 .scaleExtent([0.7, 3])
 .on('zoom', function () {
  self.onZoom(this)
 });
 this.svg.call(zoom)
}

//初始化图标
initDefineSymbol() {
 let defs=this.container.append('svg:defs');

//箭头
 const marker = defs
 .selectAll('marker')
 .data(this.edges)
 .enter()
 .append('svg:marker')
 .attr('id', (link, i) => 'marker-' + i)
 .attr('markerUnits', 'userSpaceOnUse')
 .attr('viewBox', '0 -5 10 10')
 .attr('refX', symbolSize / 2 + padding)
 .attr('refY', 0)
 .attr('markerWidth', 14)
 .attr('markerHeight', 14)
 .attr('orient', 'auto')
 .attr('stroke-width', 2)
 .append('svg:path')
 .attr('d', 'M2,0 L0,-3 L9,0 L0,3 M2,0 L0,-3')
 .attr('class','arrow')

//数据库
 let database =defs.append('g')
  .attr('id','database')
 .attr('transform','scale(0.042)');

database.append('path')
 .attr('d','M512 800c-247.42 0-448-71.63-448-160v160c0 88.37 200.58 160 448 160s448-71.63 448-160V640c0 88.37-200.58 160-448 160z')

database.append('path')
 .attr('d','M512 608c-247.42 0-448-71.63-448-160v160c0 88.37 200.58 160 448 160s448-71.63 448-160V448c0 88.37-200.58 160-448 160z') ;

database.append('path')
 .attr('d','M512 416c-247.42 0-448-71.63-448-160v160c0 88.37 200.58 160 448 160s448-71.63 448-160V256c0 88.37-200.58 160-448 160z') ;

database.append('path')
 .attr('d','M64 224a448 160 0 1 0 896 0 448 160 0 1 0-896 0Z');

//云
 let cloud=defs.append('g')
 .attr('id','cloud')
 .attr('transform','scale(0.042)')
 .append('path')
 .attr('d','M709.3 285.8C668.3 202.7 583 145.4 484 145.4c-132.6 0-241 102.8-250.4 233-97.5 27.8-168.5 113-168.5 213.8 0 118.9 98.8 216.6 223.4 223.4h418.9c138.7 0 251.3-118.8 251.3-265.3 0-141.2-110.3-256.2-249.4-264.5z')

}

//初始化链接线
initLink() {
 this.drawLinkLine();
 this.drawLinkText();
}

//初始化节点
initNode() {
 var self = this;
 //节点容器
 this.nodes = this.container.selectAll(".node")
 .data(this.data)
 .enter()
 .append("g")
 .attr("transform", function (d) {
  return "translate(" + d.x + "," + d.y + ")";
 })
 .call(d3.drag()
  .on("drag", function (d) {
   self.onDrag(this, d)
  })
 )
 .on('click', function () {
  alert()
 })

//节点背景默认覆盖层
 this.nodes.append('circle')
 .attr('r', symbolSize / 2 + padding)
 .attr('class', 'node-bg');

//节点图标
 this.drawNodeSymbol();
 //节点标题
 this.drawNodeTitle();
 //节点其他说明
 this.drawNodeOther();
 this.drawNodeCode();

}

//画节点语言标识
drawNodeCode() {
 this.nodeCodes = this.nodes.filter(item => item.type == 'app')
 .append('g')
 .attr('class','node-code')
 .attr('transform', 'translate(' + -symbolSize / 2 + ',' + symbolSize / 3 + ')')

this.nodeCodes
 .append('circle')
 .attr('r', d => fontSize / 2 * d.code.length / 2 + 3)

this.nodeCodes
 .append('text')
 .attr('dy', fontSize / 2)
 .text(item => item.code);

}

//画节点图标
drawNodeSymbol() {
 //绘制节点
 this.nodes.filter(item=>item.type=='app')
 .append("circle")
 .attr("r", symbolSize / 2)
 .attr("fill", '#fff')
 .attr('class', function (d) {
  return 'health'+d.health;
 })
 .attr('stroke-width', '5px')

this.nodes.filter(item=>item.type=='database')
 .append('use')
 .attr('xlink:href','#database')
 .attr('x',function () {
  return -this.getBBox().width/2
 })
 .attr('y',function () {
  return -this.getBBox().height/2
 })

this.nodes.filter(item=>item.type=='cloud')
 .append('use')
 .attr('xlink:href','#cloud')
 .attr('x',function () {
  return -this.getBBox().width/2
 })
 .attr('y',function () {
  return -this.getBBox().height/2
 })
}

//画节点右侧信息
drawNodeOther() {
 //如果是应用的时候
 this.nodeOthers = this.nodes.filter(item => item.type == 'app')
 .append("text")
 .attr("x", symbolSize / 2 + padding)
 .attr("y", -5)
 .attr('class','node-other')

this.nodeOthers.append('tspan')
 .text(d => d.time + 'ms');

this.nodeOthers.append('tspan')
 .text(d => d.rpm + 'rpm')
 .attr('x', symbolSize / 2 + padding)
 .attr('dy', '1em');

this.nodeOthers.append('tspan')
 .text(d => d.epm + 'epm')
 .attr('x', symbolSize / 2 + padding)
 .attr('dy', '1em')
}

//画节点标题
drawNodeTitle() {
 //节点标题
 this.nodes.append("text")
 .attr('class','node-title')
 .text(function (d) {
  return d.name;
 })
 .attr("dy", symbolSize)

this.nodes.filter(item => item.type == 'app').append("text")
 .text(function (d) {
  return d.active + '/' + d.total;
 })
 .attr('dy', fontSize / 2)
 .attr('class','node-call')

}

//画节点链接线
drawLinkLine() {
 let data = this.data;
 if (this.lineGroup) {
  this.lineGroup.selectAll('.link')
  .attr(
   'd', link => genLinkPath(link),
  )
 } else {
  this.lineGroup = this.container.append('g')

this.lineGroup.selectAll('.link')
  .data(this.edges)
  .enter()
  .append('path')
  .attr('class', 'link')
  .attr(
   'marker-end', (link, i) => 'url(#' + 'marker-' + i + ')'
  ).attr(
   'd', link => genLinkPath(link),
  ).attr(
   'id', (link, i) => 'link-' + i
  )
  .on('click', () => { alert() })
 }

function genLinkPath(d) {
  let sx = data[d.source].x;
  let tx = data[d.target].x;
  let sy = data[d.source].y;
  let ty = data[d.target].y;
  return 'M' + sx + ',' + sy + ' L' + tx + ',' + ty;
 }
}

drawLinkText() {
 let data = this.data;
 let self = this;
 if (this.lineTextGroup) {
  this.lineTexts
  .attr('transform', getTransform)

} else {
  this.lineTextGroup = this.container.append('g')

this.lineTexts = this.lineTextGroup
  .selectAll('.linetext')
  .data(this.edges)
  .enter()
  .append('text')
  .attr('dy', -2)
  .attr('transform', getTransform)
  .on('click', () => { alert() })

this.lineTexts
  .append('tspan')
  .text((d, i) => this.data[d.source].lineTime + 'ms,' + this.data[d.source].lineRpm + 'rpm');

this.lineTexts
  .append('tspan')
  .text((d, i) => this.data[d.source].lineProtocol)
  .attr('dy', '1em')
  .attr('dx', function () {
   return -this.getBBox().width / 2
  })
 }

function getTransform(link) {
  let s = data[link.source];
  let t = data[link.target];
  let p = self.getCenter(s.x, s.y, t.x, t.y);
  let angle = self.getAngle(s.x, s.y, t.x, t.y);
  if (s.x > t.x && s.y < t.y || s.x < t.x && s.y > t.y) {
   angle = -angle
  }
  return 'translate(' + p[0] + ',' + p[1] + ') rotate(' + angle + ')'
 }
}

update(d) {
 this.drawLinkLine();
 this.drawLinkText();
}

//拖拽方法
onDrag(ele, d) {
 d.x = d3.event.x;
 d.y = d3.event.y;
 d3.select(ele)
 .attr('transform', "translate(" + d3.event.x + "," + d3.event.y + ")")
 this.update(d);
}

//缩放方法
onZoom(ele) {
 var transform = d3.zoomTransform(ele);
 this.scale = transform.k;
 this.container.attr('transform', "translate(" + transform.x + "," + transform.y + ")scale(" + transform.k + ")")
}

}

数据:


let __options={
data:[{
 type:'app',
 name: 'monitor-web-server',
 time: 30,
 rpm: 40,
 epm: 50,
 active: 3,
 total: 5,
 code: 'java',
 health: 1,
 lineProtocol: 'http',
 lineTime: 12,
 lineRpm: 34,
}, {
 type:'database',
 name: 'Mysql',
 time: 30,
 rpm: 40,
 epm: 50,
 active: 3,
 total: 5,
 code: 'java',
 health: 2,
 lineProtocol: 'http',
 lineTime: 12,
 lineRpm: 34,

},
 {
  type:'app',
  name: 'Redis',
  time: 30,
  rpm: 40,
  epm: 50,
  active: 3,
  total: 5,
  code: 'java',
  health: 3,
  lineProtocol: 'http',
  lineTime: 12,
  lineRpm: 34,

}, {
  type:'cloud',
  name: 'ES',
  time: 30,
  rpm: 40,
  epm: 50,
  active: 3,
  total: 5,
  code: 'java',
  health: 1,
  lineProtocol: 'http',
  lineTime: 12,
  lineRpm: 34,
  value: 100
 }
],
edges: [
  {
  source: 0,
  target: 3,
 }, {
  source: 1,
  target: 2,
 }
 , {
  source: 1,
  target: 3,
 },
 {
  source: 0,
  target: 1,
 },
 {
  source: 0,
  target: 2,
 }
 // {
 //  source: 3,
 //  target: 2,
 // },
]
}

来源:https://segmentfault.com/a/1190000015435525

0
投稿

猜你喜欢

手机版 网络编程 asp之家 www.aspxhome.com