javascript - D3.js Hierarchical Edge Bundling，如何更改文本组的颜色？

Question

所以我从 d3.js 拿了一个代码，我正在玩它，但我不完全理解 de json 和 js 连接，我想改变某个文本组的颜色，例如 flare.analytics 组

我从这里获取代码，它包含 json 代码:https://gist.github.com/mbostock/7607999

我将在下面显示 javascript。

提前致谢。

var diameter = 960,
    radius = diameter / 2,
    innerRadius = radius - 120;
var cluster = d3.cluster()
    .size([360, innerRadius]);
var line = d3.radialLine()
    .curve(d3.curveBundle.beta(0.85))
    .radius(function(d) { return d.y; })
    .angle(function(d) { return d.x / 180 * Math.PI; });
var svg = d3.select("body").append("svg")
    .attr("width", diameter)
    .attr("height", diameter)
  .append("g")
    .attr("transform", "translate(" + radius + "," + radius + ")");
var link = svg.append("g").selectAll(".link"),
    node = svg.append("g").selectAll(".node");
d3.json("flare.json", function(error, classes) {
  if (error) throw error;
  var root = packageHierarchy(classes)
      .sum(function(d) { return d.size; });
  cluster(root);
  link = link
    .data(packageImports(root.leaves()))
    .enter().append("path")
      .each(function(d) { d.source = d[0], d.target = d[d.length - 1]; })
      .attr("class", "link")
      .attr("d", line);
  node = node
    .data(root.leaves())
    .enter().append("text")
      .attr("class", "node")
      .attr("dy", "0.31em")
      .attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + (d.y + 8) + ",0)" + (d.x < 180 ? "" : "rotate(180)"); })
      .attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
      .text(function(d) { return d.data.key; })
      .on("mouseover", mouseovered)
      .on("mouseout", mouseouted);
});
function mouseovered(d) {
  node
      .each(function(n) { n.target = n.source = false; });
  link
      .classed("link--target", function(l) { if (l.target === d) return l.source.source = true; })
      .classed("link--source", function(l) { if (l.source === d) return l.target.target = true; })
    .filter(function(l) { return l.target === d || l.source === d; })
      .raise();
  node
      .classed("node--target", function(n) { return n.target; })
      .classed("node--source", function(n) { return n.source; });
}
function mouseouted(d) {
  link
      .classed("link--target", false)
      .classed("link--source", false);
  node
      .classed("node--target", false)
      .classed("node--source", false);
}
// Lazily construct the package hierarchy from class names.
function packageHierarchy(classes) {
  var map = {};
  function find(name, data) {
    var node = map[name], i;
    if (!node) {
      node = map[name] = data || {name: name, children: []};
      if (name.length) {
        node.parent = find(name.substring(0, i = name.lastIndexOf(".")));
        node.parent.children.push(node);
        node.key = name.substring(i + 1);
      }
    }
    return node;
  }
  classes.forEach(function(d) {
    find(d.name, d);
  });
  return d3.hierarchy(map[""]);
}
// Return a list of imports for the given array of nodes.
function packageImports(nodes) {
  var map = {},
      imports = [];
  // Compute a map from name to node.
  nodes.forEach(function(d) {
    map[d.data.name] = d;
  });
  // For each import, construct a link from the source to target 
node.
  nodes.forEach(function(d) {
    if (d.data.imports) d.data.imports.forEach(function(i) {
      imports.push(map[d.data.name].path(map[i]));
    });
  });
  return imports;
}

Graph

Answer 1

如果你想从数据中改变文本的颜色，你需要传递一个函数来分析每个节点的数据并返回你需要的特定颜色。

在追加文本节点的情况下:

node = node
    .data(root.leaves())
    .enter().append("text")
      .attr("class", "node")

      // SETING CONDICIONAL FILL FOR TEXT
       .style("fill", function(d){
          // if name of node has 'flare.analytics' return red, if not '#000000' 
          if (d.data.name.indexOf('flare.analytics') > -1) return '#ff0000';
          return '#000000';
       })

      .attr("dy", "0.31em")
      .attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + (d.y + 8) + ",0)" + (d.x < 180 ? "" : "rotate(180)"); })
      .attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
      .text(function(d) { return d.data.key; })
      .on("mouseover", mouseovered)
      .on("mouseout", mouseouted);