javascript - D3.js Decision Tree - text wraping, bounding box, # of load circles -

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i'm trying create decision tree in d3.

problems: - text goes off right side, can/how set bounding box stop that?

  • the text in circle isn't wrapping. willing make circles bigger fit text, wrapping still problem.

  • how first 3 circles show on load?

var treedata = [    {      "name": "tk question here that's long",      "content":"question here long",      "parent": "null",      "children": [        {          "name": "level 2: a",          "parent": "top level",          "children": [            {              "name": "son of a",              "parent": "level 2: a"            },            {              "name": "daughter of a",              "parent": "level 2: a"            }          ]        },        {          "name": "level 2: b",          "parent": "top level"        }      ]    }  ];      // ************** generate tree diagram	 *****************  var margin = {top: 20, right: 120, bottom: 20, left: 120},  	width = 860 - margin.right - margin.left,  	height = 500 - margin.top - margin.bottom;  	  var = 0,  	duration = 750,  	root;    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.x0 = height / 2;  root.y0 = 0;      update(root);    d3.select(self.frameelement).style("height", "500px");    function update(source) {      // compute new tree layout.    var nodes = tree.nodes(root).reverse(),  	  links = tree.links(nodes);                  // normalize fixed-depth.    nodes.foreach(function(d) { d.y = d.depth * 180; });      // update nodes…    var node = svg.selectall("g.node")  	  .data(nodes, function(d) { return d.id || (d.id = ++i); });                  // enter new nodes @ parent's previous position.    var nodeenter = node.enter().append("g")  	  .attr("class", "node")  	  .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })  	  .on("click", click);      nodeenter.append("circle")  	  .attr("r", 1e-6)  	  .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });              nodeenter.append("text")  	  .attr("x", function(d) { return d.children || d._children ? -33 : 13; })  	  .attr("dy", ".35em")  	  .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })  	  .text(function(d) { return d.name; })  	  .style("fill-opacity", 1e-6);              nodeenter.append("text")      .attr("x", 0)      .attr("dy", ".35em")      .attr("text-anchor", "middle")      .text(function(d) { return d.content; });      // transition nodes new position.    var nodeupdate = node.transition()  	  .duration(duration)  	  .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });      nodeupdate.select("circle")  	  .attr("r", 30)  	  .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });      nodeupdate.select("text")  	  .style("fill-opacity", 1);      // transition exiting nodes parent's new position.    var nodeexit = node.exit().transition()  	  .duration(duration)  	  .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })  	  .remove();      nodeexit.select("circle")  	  .attr("r", 1e-6);      nodeexit.select("text")  	  .style("fill-opacity", 1e-6);      // update links…    var link = svg.selectall("path.link")  	  .data(links, function(d) { return d.target.id; });      // enter new links @ parent's previous position.    link.enter().insert("path", "g")  	  .attr("class", "link")  	  .attr("d", function(d) {  		var o = {x: source.x0, y: source.y0};  		return diagonal({source: o, target: o});  	  });      // transition links new position.    link.transition()  	  .duration(duration)  	  .attr("d", diagonal);      // transition exiting nodes parent's new position.    link.exit().transition()  	  .duration(duration)  	  .attr("d", function(d) {  		var o = {x: source.x, y: source.y};  		return diagonal({source: o, target: o});  	  })  	  .remove();      // stash old positions transition.    nodes.foreach(function(d) {  	d.x0 = d.x;  	d.y0 = d.y;    });  }    // toggle children on click.  function click(d) {    if (d.children) {  	d._children = d.children;  	d.children = null;    } else {  	d.children = d._children;  	d._children = null;    }    update(d);  }
	.node {  		cursor: pointer;  	}    	.node circle {  	  fill: #fff;  	  stroke: steelblue;  	  stroke-width: 3px;  	}    	.node text {  	  font: 12px sans-serif;  	}    	.link {  	  fill: none;  	  stroke: #ccc;  	  stroke-width: 2px;  	}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>  <!doctype html>  <html lang="en">    <head>      <meta charset="utf-8">        <title>tree example</title>      </head>      <body>  	    </body>  </html>

for wrapping of text mike bostock covered in example: text wrapping in d3 , showing of nodes, should include filter after data show tipes of data (i.e. nodes have either no parents or 1 parent , son (so first , middle ones)


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