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【D3.js】力导向布局 + 圆形图片展示的人物关系

2016-11-18 16:06 190 查看

前言

使用d3的力学图（力导向图）与生活中常见的人物关系图结合，已经有了很好的例子： 【 D3.js 进阶系列 — 2.0 】力学图 + 人物关系图，博主实现了下面这种样式，已经相当不错了。

但是对于想把节点的方形图片换成圆形头像，网上的资料却很少，本例子就在上面的实例的基础上实现圆形头像，让人物关系图看起来更漂亮了一个档次。两个主要文件如下：

# index.html

<html>
<head>
<meta charset="utf-8">
<title>Force</title>
<style>

.nodetext {
font-size: 12px ;
font-family: SimSun;
fill:#000000;
}

.linetext {
font-size: 12px ;
font-family: SimSun;
fill:#1f77b4;
fill-opacity:0.0;
}

.circleImg {
stroke: #ff7f0e;
stroke-width: 1.5px;
}

</style></head>

<body>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>

var width = 900;
var height = 800;
var img_w = 77;
var img_h = 80;
var radius = 30;    //圆形半径

var svg = d3.select("body").append("svg")
.attr("width",width)
.attr("height",height);

d3.json("relation.json",function(error,root){

if( error ){
return console.log(error);
}
console.log(root);

//D3力导向布局
var force = d3.layout.force()
.nodes(root.nodes)
.links(root.edges)
.size([width,height])
.linkDistance(200)
.charge(-1500)
.start();

//边
var edges_line = svg.selectAll("line")
.data(root.edges)
.enter()
.append("line")
.style("stroke","#ccc")
.style("stroke-width",1);

//边上的文字（人物之间的关系）
var edges_text = svg.selectAll(".linetext")
.data(root.edges)
.enter()
.append("text")
.attr("class","linetext")
.text(function(d){
return d.relation;
});

// 圆形图片节点（人物头像）
var nodes_img = svg.selectAll("image")
.data(root.nodes)
.enter()
.append("circle")
.attr("class", "circleImg")
.attr("r", radius)
.attr("fill", function(d, i){

//创建圆形图片
var defs = svg.append("defs").attr("id", "imgdefs")

var catpattern = defs.append("pattern")
.attr("id", "catpattern" + i)
.attr("height", 1)
.attr("width", 1)

catpattern.append("image")
.attr("x", - (img_w / 2 - radius))
.attr("y", - (img_h / 2 - radius))
.attr("width", img_w)
.attr("height", img_h)
.attr("xlink:href", d.image)

return "url(#catpattern" + i + ")";

})
.on("mouseover",function(d,i){
//显示连接线上的文字
edges_text.style("fill-opacity",function(edge){
if( edge.source === d || edge.target === d ){
return 1.0;
}
});
})
.on("mouseout",function(d,i){
//隐去连接线上的文字
edges_text.style("fill-opacity",function(edge){
if( edge.source === d || edge.target === d ){
return 0.0;
}
});
})
.call(force.drag);

var text_dx = -20;
var text_dy = 20;

var nodes_text = svg.selectAll(".nodetext")
.data(root.nodes)
.enter()
.append("text")
.attr("class","nodetext")
.attr("dx",text_dx)
.attr("dy",text_dy)
.text(function(d){
return d.name;
});

force.on("tick", function(){

//限制结点的边界
root.nodes.forEach(function(d,i){
d.x = d.x - img_w/2 < 0     ? img_w/2 : d.x ;
d.x = d.x + img_w/2 > width ? width - img_w/2 : d.x ;
d.y = d.y - img_h/2 < 0      ? img_h/2 : d.y ;
d.y = d.y + img_h/2 + text_dy > height ? height - img_h/2 - text_dy : d.y ;
});

//更新连接线的位置
edges_line.attr("x1",function(d){ return d.source.x; });
edges_line.attr("y1",function(d){ return d.source.y; });
edges_line.attr("x2",function(d){ return d.target.x; });
edges_line.attr("y2",function(d){ return d.target.y; });

//更新连接线上文字的位置
edges_text.attr("x",function(d){ return (d.source.x + d.target.x) / 2 ; });
edges_text.attr("y",function(d){ return (d.source.y + d.target.y) / 2 ; });

//更新结点图片和文字
nodes_img.attr("cx",function(d){ return d.x });
nodes_img.attr("cy",function(d){ return d.y });

nodes_text.attr("x",function(d){ return d.x });
nodes_text.attr("y",function(d){ return d.y + img_w/2; });
});
});

</script>

</body>
</html>

# relation.json

{
"nodes":[
{ "name": "云天河"   , "image" : "tianhe.png" },
{ "name": "韩菱纱"   , "image" : "lingsha.png" },
{ "name": "柳梦璃"   , "image" : "mengli.png" },
{ "name": "慕容紫英" , "image" : "ziying.png" },
{ "name": "云天青" , "image" : "tianqing.png" },
{ "name": "夙玉" , "image" : "suyu.png" },
{ "name": "玄霄" , "image" : "xuanxiao.png" },
{ "name": "夙瑶" , "image" : "suyao.png" },
{ "name": "太清" , "image" : "taiqing.png" },
{ "name": "宗炼" , "image" : "zonglian.png" },
{ "name": "婵幽" , "image" : "chanyou.png" },
{ "name": "奚仲" , "image" : "xizhong.png" },
{ "name": "归邪" , "image" : "guixie.png" }
],
"edges":[
{ "source": 0 , "target": 1 , "relation":"挚友" },
{ "source": 0 , "target": 2 , "relation":"挚友" },
{ "source": 0 , "target": 3 , "relation":"挚友" },
{ "source": 1 , "target": 2 , "relation":"挚友" },
{ "source": 1 , "target": 3 , "relation":"挚友" },
{ "source": 2 , "target": 3 , "relation":"挚友" },
{ "source": 0 , "target": 4 , "relation":"父子" },
{ "source": 0 , "target": 5 , "relation":"母子" },
{ "source": 4 , "target": 5 , "relation":"夫妻" },
{ "source": 0 , "target": 6 , "relation":"义兄弟" },
{ "source": 4 , "target": 6 , "relation":"同门" },
{ "source": 5 , "target": 6 , "relation":"同门" },
{ "source": 4 , "target": 7 , "relation":"同门" },
{ "source": 5 , "target": 7 , "relation":"同门" },
{ "source": 6 , "target": 7 , "relation":"同门" },
{ "source": 4 , "target": 8 , "relation":"师徒" },
{ "source": 5 , "target": 8 , "relation":"师徒" },
{ "source": 6 , "target": 8 , "relation":"师徒" },
{ "source": 7 , "target": 8 , "relation":"师徒" },
{ "source": 8 , "target": 9 , "relation":"同门" },
{ "source": 3 , "target": 9 , "relation":"师徒" },
{ "source": 2 , "target": 10 , "relation":"母子" },
{ "source": 10 , "target": 11 , "relation":"主臣" },
{ "source": 10 , "target": 12 , "relation":"主臣" },
{ "source": 11 , "target": 12 , "relation":"同僚" }
]
}

【参考资料】

【 D3.js 进阶系列 — 2.0 】力学图 + 人物关系图

how to make an image round in d3.js

用D3画简单的力导图

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