svg - D3: d3 tree - Styling nodes in a tree diagram - 小渝人儿

    <!doctype html>


 <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>tree</title>
        <style>

        .node circle {
          fill: #fff;
          stroke: steelblue;
          stroke-width: 3px;
        }

        .node text { font: 12px sans-serif; }

        .link {
          fill: none;
          stroke: #ccc;
          stroke-width: 2px;
        }

        </style>
    </head>
    <body>
   <script src="http://d3js.org/d3.v3.min.js"></script> 
    <script type="text/javascript">
    var treeData = [
      {
        "name": "Top Level",
        "parent": "null",
        "value": 10,
        "type": "black",
        "level": "red",
        "children": [
          {
            "name": "Level 2: A",
            "parent": "Top Level",
            "value": 15,
            "type": "grey",
            "level": "red",
            "children": [
              {
                "name": "Son of A",
                "parent": "Level 2: A",
                "value": 5,
                "type": "steelblue",
                "level": "orange"
              },
              {
                "name": "Daughter of A",
                "parent": "Level 2: A",
                "value": 8,
                "type": "steelblue",
                "level": "red"
              }
            ]
          },
          {
            "name": "Level 2: B",
            "parent": "Top Level",
            "value": 10,
            "type": "grey",
            "level": "green"
          }
        ]
      }
    ];

    // ************** Generate the tree diagram  *****************
    var margin = {top: 20, right: 120, bottom: 20, left: 120},
        width = 960 - margin.right - margin.left,
        height = 500 - margin.top - margin.bottom;

    var i = 0;

    var tree = d3.layout.tree()
        .size([height, width]);

    var diagonal = d3.svg.diagonal()
        .projection(function(d) { return [d.y, d.x]; });

    var svg = d3.select("body").append("svg")
        .attr("width", width + margin.right + margin.left)
        .attr("height", height + margin.top + margin.bottom)
        .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    root = treeData[0];
    //root = treeData[0].children[0];

    update(root);

    function update(source) {

      // Compute the new tree layout.
      var nodes = tree.nodes(root).reverse(),
          links = tree.links(nodes);

      // Normalize for fixed-depth.
      nodes.forEach(function(d) { d.y = d.depth * 180; });

      // Declare the nodesâ€¦
      var node = svg.selectAll("g.node")
          .data(nodes, function(d) { return d.id || (d.id = ++i); });

      // Enter the nodes.
      var nodeEnter = node.enter().append("g")
          .attr("class", "node")
          .attr("transform", function(d) { 
              return "translate(" + d.y + "," + d.x + ")"; });

      nodeEnter.append("circle")
          .attr("r", function(d) { return d.value; })
          .style("stroke", function(d) { return d.type; })
          .style("fill", function(d) { return d.level; });

      nodeEnter.append("text")
           .attr("x", function(d) { 
              return d.children || d._children ? 
              (d.value + 4) * -1 : d.value + 4 })
          .attr("dy", ".35em")
          .attr("text-anchor", function(d) { 
              return d.children || d._children ? "end" : "start"; })
          .text(function(d) { return d.name; })
          .style("fill-opacity", 1);

      // Declare the linksâ€¦
      var link = svg.selectAll("path.link")
          .data(links, function(d) { return d.target.id; });

      // Enter the links.
     link.enter().insert("path", "g")
          .attr("class", "link")
          .style("stroke", function(d) { return d.target.level; })
          .attr("d", diagonal);

    }   
    </script>
    </body>
    </html>

效果：
请输入图片描述

这里主要是把value, type, level 放到数据里面,在下面的两个地方分别取值就ok

nodeEnter.append("circle")
  .attr("r", function(d) { return d.value; })
  .style("stroke", function(d) { return d.type; })
  .style("fill", function(d) { return d.level; });

link.enter().insert("path", "g")
  .attr("class", "link")
  .style("stroke", function(d) { return d.target.level; })
  .attr("d", diagonal);

D3: d3 tree - Styling nodes in a tree diagram

小渝人儿

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