Interactive-Bubble-Chart

Circle Pack and Force Layout

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Demo

Click here: Demo

Code

HTML

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<div id="bubble-word" class="bubble-word"></div>

CSS

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.bubble-word {
width: 100%;
height: 100%;
}
.bubble-word > svg {
width: 100%;
height: 100%;
display: block;
}
.bubble-word .bubble text{
text-anchor: middle;
fill: #333;
font-size: 16px;
}

JS运行环境:IE10+ 、d3.js (v4.13)

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let svg,
pack,
bubble,
simulation;

const width = document.body.clientWidth;
const height = document.body.clientHeight;
const centerX = width * 0.5;
const centerY = height * 0.5;
const scaleColor = d3.scaleOrdinal(d3.schemeCategory20);
let forceCollide = d3.forceCollide(d => d.r + 1); // create a circle collision force.

getData();

function init(data) {
svg = d3.select("#bubble-word")
.append('svg')
.attr("xmlns", "http://www.w3.org/2000/svg");

// use pack to calculate radius of the circle
pack = d3.pack()
.size([width, height])
.padding(1.5);

// @v4 strength to apply to the position forces
const forceStrength = 0.05;

// @v4 We create a force simulation now and add forces to it.
// velocityDecay: 默认为 0.4,衰减系数类似于阻力。
// 较低的衰减系数可以使得迭代次数更多,其布局结果也会更理性,但是可能会引起数值不稳定从而导致震荡
simulation = d3.forceSimulation()
// .velocityDecay(0.3)
.force("x", d3.forceX(centerX).strength(forceStrength))
.force("y", d3.forceY(centerY).strength(forceStrength))
.force("charge", d3.forceManyBody())//-Math.pow(d.radius, 2.0) * forceStrength)
.force("collide", forceCollide);

// @v4 Force starts up automatically,
// which we don't want as there aren't any nodes yet.
// simulation.stop();

draw(data);
}

/**
* @method createNodes 创建节点
* @param {Object} source
*/
function createNodes(source) {
let root = d3.hierarchy({ children: source })
.sum(d => d.value);

const rootData = pack(root).leaves().map((d, i) => {
const data = d.data;
const color = scaleColor(data.name);
return {
x: centerX + (d.x - centerX) * 3,
y: centerY + (d.y - centerY) * 3,
id: "bubble" + i,
r: 0,
radius: d.r,
value: data.value,
name: data.name,
color: color,
}
});

// sort them to prevent occlusion of smaller nodes.
rootData.sort((a, b) => b.value - a.value);
return rootData;
}

/**
* @method draw 绘制bubble,动画初始化
* @param {Object} data
*/
function draw(data) {
const nodes = createNodes(data);
console.log(nodes);

// @v4 Once we set the nodes, the simulation will start running automatically!
simulation.nodes(nodes).on("tick", ticked);

bubble = svg.selectAll(".bubble")
.data(nodes)
.enter().append("g")
.attr("class", "bubble")
.call(d3.drag()
.on("start", (d) => {
if (!d3.event.active) { simulation.alphaTarget(0.2).restart(); }
d.fx = d.x;
d.fy = d.y;
})
.on("drag", (d) => {
d.fx = d3.event.x;
d.fy = d3.event.y;
})
.on("end", (d) => {
if (!d3.event.active) { simulation.alphaTarget(0); }
d.fx = null;
d.fy = null;
})
);
// .on("mouseover", d => {
// d3.select("#"+d.id).attr("fill", d3.color(d.color).brighter());
// }).on("mouseout", d => {
// d3.select("#"+d.id).attr("fill", d.color);
// });

var href = bubble.append("a")
.attr("href", d => "http://me.chjiyun.com/#"+d.name)
.attr("target", "_blank");

href.append("circle")
.attr("id", d => d.id)
.attr("r", 1e-6)
.attr("fill", d => d.color)
.transition().duration(2000).ease(d3.easeElasticOut)
.tween("circleIn", d => {
let i = d3.interpolateNumber(0, d.radius);
return (t) => {
d.r = i(t);
simulation.force("collide", forceCollide);
};
});

href.append("text")
.attr("dy", d => "0.35em")
.text(d => d.name);
}

function getData() {
d3.json("/data/bubble.json", function(err, data) {
if (err) throw err;

init(data.data);
});
}

function ticked() {
bubble.attr("transform", d => `translate(${d.x},${d.y})`)
.select("circle")
.attr("r", d => d.r);
}

注意:低版本浏览器无法解析此代码,需转译成es5运行

bubble.json

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{
"code": 0,
"data":[
{
"name": "Lily",
"value": 1
},{
"name": "Shane",
"value": 2
},{
"name": "Sunshine",
"value": 8
},{
"name": "Moon",
"value": 10
},{
"name": "Meton",
"value": 6
},{
"name": "Huton",
"value": 12
},{
"name": "Ryan",
"value": 4
},{
"name": "Ryan",
"value": 4
},{
"name": "Cyan",
"value": 5
},{
"name": "Huston",
"value": 3
}
]
}

参考:
Bubble Chart
Interactive bubble chart combining Circle Pack and Force Layout
Force-Directed Graph

✧(≖‿≖)✧ 谢谢您的支持 (●'◡'●)ノ♥
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