在d3 v4网络图中为节点添加不同的图像 [英] Add different images for nodes in d3 v4 network graph
问题描述
我知道有一些主题可以讨论这个问题但是找不到的结果对我有用。我正在尝试修改经典的d3网络图悲惨的例子（d3v4版本在这里： https：// bl .ocks.org / mbostock / 4062045 ）为不同的节点添加不同的图像 - 文件的相对路径作为节点属性之一给出，例如。
I know it's there're a few topics that discuss the issue but non of the found results worked for me. I'm trying to modify the classic d3 network graph Les miserables example (d3v4 version HERE: https://bl.ocks.org/mbostock/4062045) to add different images for different nodes - the relative path of the file being given as one of the node attributes, eg.
{"id": "Valjean", "group": 1, img: "images/male.png"},
我想要达到的目的与此类似： https://bl.ocks.org/mbostock/950642 但在d3v4中制作，并为不同节点制作不同的图像。
What I'm trying to achieve is similar to this:https://bl.ocks.org/mbostock/950642 but made in d3v4, and different images for different nodes.
全部我找到的例子（也是这个的代码片段，遗憾的是它没有'为我工作）指向类似的方法，看起来或多或少像这样（在d3 v4和v3中）：
All examples that I found (also this promissing code snippet, which unfortunately doesnt't work for me) point me to similar approach, which looks more or less like this(both in d3 v4 and v3):
node.append("image")
.attr("xlink:href", function(d) { return d.img })
.attr("x", -8)
.attr("y", -8)
.attr("width", 16)
.attr("height", 16);
然而，尽管花了几个小时，但我还是无法运作。任何想法？
However, despite a few hours spent I can not make it work. Any ideas?
推荐答案
这是一个结合 v4 示例的快速示例使用基于 v3 的图像示例：
Here's a quick example which combines your v4 example with an image based on your v3 example:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #fff;
stroke-width: 1.5px;
}
</style>
<svg width="960" height="600"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) {
return d.id;
}))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
d3.json("https://jsonblob.com/api/9f7e2c48-8ccd-11e7-8b46-ef38640909a4", function(error, graph) {
if (error) throw error;
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) {
return Math.sqrt(d.value);
});
var node = svg.append("g")
.attr("class", "nodes")
.selectAll("image")
.data(graph.nodes)
.enter().append("image")
.attr("xlink:href", "https://github.com/favicon.ico")
.attr("x", -8)
.attr("y", -8)
.attr("width", 16)
.attr("height", 16)
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
node.append("title")
.text(function(d) {
return d.id;
});
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
link
.attr("x1", function(d) {
return d.source.x;
})
.attr("y1", function(d) {
return d.source.y;
})
.attr("x2", function(d) {
return d.target.x;
})
.attr("y2", function(d) {
return d.target.y;
});
node
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
}
});
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;
}
</script> 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;
}
</script>
添加图片应该是就像更改和 .attr（xlink：href to：
Adding in your images should then be as simple as changing and .attr("xlink:href" to:
.attr("xlink:href", function(d){
return d.img;
)};
这篇关于在d3 v4网络图中为节点添加不同的图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
