【发布时间】：2021-05-21 06:13:35
【问题描述】：
我想将一个大圆圈内的节点连接到另一个大圆圈内的节点，或者有时连接到另一个更大的圆圈本身。有没有办法达到同样的效果？我能够连接同一圈内的节点。
以下是我尝试过的示例代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style type="text/css">
.node {}
.link { stroke: #999; stroke-opacity: .6; stroke-width: 1px; }
</style>
<script src="https://d3js.org/d3.v4.min.js" type="text/javascript"></script>
<script src="https://d3js.org/d3-selection-multi.v1.js"></script>
</head>
<svg width="960" height="600"></svg>
<script type="text/javascript">
var data = {
"nodes": [
{
"id": "Myriel",
"group": 1,
"value": 3, // basically in this ratio the circle radius will be
"childNode" : [{
"id": "child1",
"value": 2
},{
"id": "child2",
"value": 3
},{
"id": "child3",
"value": 1
}],
"links": [{
"source": "child1",
"target": "child2",
"isByDirectional": true
},{
"source": "child1",
"target": "child3",
"isByDirectional": false
}
]
},
{
"id": "Napoleon",
"group": 1,
"value": 2, // basically in this ratio the circle radius will be
"childNode" : [{
"id": "child4",
"value": 2
},{
"id": "child5",
"value": 3
}],
"links": null
},
{
"id": "Mlle.Baptistine",
"group": 1,
"value": 1, // basically in this ratio the circle radius will be
},
{
"id": "Mme.Magloire",
"group": 1,
"value" : 1,
},
{
"id": "CountessdeLo",
"group": 1,
"value" : 2,
},
{
"id": "Geborand",
"group": 1,
"value" : 3,
}
],
"links": [
{"source": "Napoleon", "target": "Myriel", "value": 1},
{"source": "Mlle.Baptistine", "target": "Napoleon", "value": 8},
{"source": "CountessdeLo", "target": "Myriel", "value": 1},
{"source": "Geborand", "target": "CountessdeLo", "value": 1}
]
}
var nodeRadiusScale = d3.scaleSqrt().domain([0, 50]).range([10, 50]);
var color = function() {
var scale = d3.scaleOrdinal(d3.schemeCategory10);
return d => scale(d.group);
}
var drag = simulation => {
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
function drawChildNodes(nodeElement, parentIds, options) {
if(!parentIds.childNodes) {
return
}
const nodeColor = options.nodeColor
const borderColor = options.borderColor
const nodeTextColor = options.nodeTextColor
const width = options.width
const height = options.height
const data = getData(parentIds, width * 2, height * 2);
const nodeData = nodeElement.selectAll("g").data(data)
var childNodeRadius = 5;
const nodesEnter = nodeData
.enter()
.append("g")
.attr("id", (d, i) => {
return "node-group-" + d.data.id
})
.attr('class', 'child-node')
.attr("transform", (d) => `translate(${d.x - width},${d.y - height})`)
.attr('cx', (d) => d.x)
.attr('cy', (d) => d.y)
nodesEnter
.filter((d) => d.height === 0)
.append("circle")
.attr("class", "node pie")
.attr("r", (d) => childNodeRadius)
.attr("stroke", borderColor)
.attr("stroke-width", 1)
.attr("fill", "white")
/*nodesEnter
.filter((d) => d.height === 0)
.append("text")
.style("fill", "black")
.attr("font-size", "0.8em")
.attr("text-anchor", "middle")
.attr("alignment-baseline", "middle")
.attr("dy", -7)
.text(d=>d.data.id)*/
if(!parentIds.childLink) {
return;
}
const linkData = nodeElement.selectAll("line").data(parentIds.childLink);
const linksEnter = linkData
.enter()
.append("line")
.attr("class", "node line")
.attr('id', (d) => d.source + '->' + d.target)
.attr("x1", (d,i) => data.find(el => el.data.id === d.source).x - width)
.attr("y1", (d,i) => data.find(el=>el.data.id === d.source).y - height)
.attr("x2", (d,i) => data.find(el=>el.data.id === d.target).x - width)
.attr("y2", (d,i) => data.find(el=>el.data.id === d.target).y - height)
.attr("stroke", 'red')
.attr("stroke-width", 1)
.attr("fill", "none")
}
function getData(parentIDs, width, height) {
var rawData = []
rawData.push({ id: "root" })
rawData.push({
id: parentIDs.key,
size: parentIDs.values,
parentId: "root"
})
parentIDs.childNodes.forEach((el) => {
rawData.push({
id: el.id,
parentId: parentIDs.key,
size: el.value
})
})
const vData = d3.stratify()(rawData)
const vLayout = d3.pack().size([width, height]).padding(10)
const vRoot = d3.hierarchy(vData).sum(function (d) {
return d.data.size
})
const vNodes = vLayout(vRoot)
const data = vNodes.descendants().slice(1)
return data
}
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var links = data.links.map(d => Object.create(d));
var nodes = data.nodes.map(d => Object.create(d));
var simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id).distance(200))
.force("charge", d3.forceManyBody().strength(0,15))
.force("collide", d3.forceCollide(function (d) {
return 100;
//return nodeRadiusScale(d.value)
}))
.force("center", d3.forceCenter(width / 2, height / 2));
var link = svg.append("g")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(links)
.enter()
.append('line')
.attr("stroke-width", d => Math.sqrt(d.value));
function zoom(focus) {
const transition = svg.transition()
.duration(750)
.attr("transform", function(){
clicked = !clicked
if(clicked){
return `translate(${-(focus.x-width/2)*k},${-(focus.y-height/2)*k})scale(${k})`
} else {
return `translate(${0},${0})})scale(1)`
}
});
}
var nodeG = svg.append("g")
.selectAll("g")
.data(nodes)
.enter()
.append('g')
.call(drag(simulation))
.on("click", d => (zoom(d), d3.event.stopPropagation()));
nodeG.append('circle')
.attr("r", d => nodeRadiusScale(d.value * 2))
.attr("fill", color);
nodeG.append('text')
.style("fill", "black")
.attr("font-size", "0.8em")
.attr("text-anchor", "middle")
.attr("alignment-baseline", "middle")
.attr("dy", d => -nodeRadiusScale(d.value * 2)- 10)
.text(d=>d.id);
nodeG.append('g')
.each(function (d) {
drawChildNodes(
d3.select(this),
{ key: d.id, values: d.value, childNodes: d.childNode, childLink: d.links },
{
width: nodeRadiusScale(d.value),
height: nodeRadiusScale(d.value),
nodeColor: 'white',
borderColor: 'black',
nodeTextColor: 'black',
}
)
});
simulation.on("tick", () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
nodeG.attr("transform", d => `translate(${d.x}, ${d.y})`)
});
</script>
<body>
我想在图中实现一些东西：
如果外圆有子节点，我们还可以添加诸如折叠和扩展圆之类的功能（如果子节点和外部节点之间存在任何链接，那么我们可以将线转移到父节点并删除子节点之间的链接折叠圆圈的位置，如果可能的话，不要改变折叠/展开圆圈的圆圈位置。）
【问题讨论】：
标签： javascript svg d3.js d3-graphviz