我有一张D3树形图
http://jsfiddle.net/bGR8N/9/
在运行时创建节点(因此它与其他示例略有不同)。我有一个显示在node.on上的文本(“mouseover ...”)。问题是节点有时会被链接重叠。现在,我知道我应该能够通过先创建链接和之后的节点来解决这个问题,但后来我得到了:
Error: Invalid value for <path> attribute d="M,C,NaN ,NaN ,"
Javascript代码:
var width = 960,
height = 500;
var tree = d3.layout.tree()
.size([width - 20, height - 20]);
var root = {},
nodes = tree(root);
root.parent = root;
root.px = root.x;
root.py = root.y;
var diagonal = d3.svg.diagonal();
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(10,10)");
var node = svg.selectAll(".node"),
link = svg.selectAll(".link");
var duration = 750;
$("#submit_button").click(function() {
update();
});
function update() {
if (nodes.length >= 500) return clearInterval(timer);
// Add a new node to a random parent.
var n = {id: nodes.length},
p = nodes[Math.random() * nodes.length | 0];
if (p.children) p.children.push(n); else p.children = [n];
nodes.push(n);
// Recompute the layout and data join.
node = node.data(tree.nodes(root), function (d) {
return d.id;
});
link = link.data(tree.links(nodes), function (d) {
return d.source.id + "-" + d.target.id;
});
// Add entering nodes in the parent’s old position.
// Add entering links in the parent’s old position.
link.enter().insert("path", ".g.node")
.attr("class", "link")
.attr("d", function (d) {
var o = {x: d.source.px, y: d.source.py};
return diagonal({source: o, target: o});
});
var gelement = node.enter().append("g");
gelement.append("circle")
.attr("class", "node")
.attr("r", 10)
.attr("cx", function (d) {
return d.parent.px;
})
.attr("cy", function (d) {
return d.parent.py;
});
node.on("mouseover", function (d) {
var g = d3.select(this); // The node
// The class is used to remove the additional text later
//debugger;
var info = g.insert('text')
.attr("x", function (d) {
//return (d.parent.px);
return (d.x + 10);
})
.attr("y", function (d) {
//return (d.parent.py);
return (d.y + 10);
})
.text(function (d) {
return "Info on FOO";
});
console.log("FOO");
});
node.on("mouseout", function (d) {
d3.select(this).select('text').remove();
});
// Transition nodes and links to their new positions.
var t = svg.transition()
.duration(duration);
t.selectAll(".link")
.attr("d", diagonal);
t.selectAll(".node")
.attr("cx", function (d) {
return d.px = d.x;
})
.attr("cy", function (d) {
return d.py = d.y;
});
}
答案 0 :(得分:0)
找出问题,不确定原因,但改变
link.enter().insert("path", ".g.node")
到
link.enter().insert("path", "g")
解决了问题