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
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,
// },
]
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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