我仍然不明白为什么下面的代码不显示它的标签/文本... 当移动到节点上时，我已经定义了 css 并设置了类似标题的属性:
JSON:
{
"nodes":[
{"name":"t1","group":1},
{"name":"t2","group":1},
{"name":"t3","group":1},
{"name":"t4","group":1},
{"name":"hate","group":2},
{"name":"good","group":2},
{"name":"aiport","group":3},
{"name":"flight","group":3}
],
"links":[
{"source":0,"target":4,"value":4},
{"source":0,"target":5,"value":4},
{"source":1,"target":4,"value":4},
{"source":2,"target":5,"value":4},
{"source":3,"target":5,"value":4},
{"source":4,"target":6,"value":4},
{"source":5,"target":6,"value":4},
{"source":5,"target":7,"value":4}
]
}
代码:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.node {
fill: #555;
stroke: #999;
stroke-width: 1.5px;
}
.link {
stroke: #999;
stroke-opacity: .6;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var width = 1024,
height = 768;
var color = d3.scale.category20();
var force = d3.layout.force()
.charge(-120)
.linkDistance(30)
.size([width, height]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("data.json", function(error, graph) {
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll("line.link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var node = svg.selectAll("circle.node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", function(d) { return color(d.group); })
.call(force.drag);
node.append("title")
.text(function(d) { return d.name; });
node.append("text")
.text(function(d) { return d.name; });
force.on("tick", function() {
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("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
});
</script>
</body>
</html>
最佳答案
您正在将文本元素添加到圆形元素内 - 尝试运行您的代码并使用 DOM 检查器查看 svg。我不确定那里是否允许文本。而是单独添加文本元素 - 就像节点的另一个渲染:
var texts = svg.selectAll("text.label")
.data(graph.nodes)
.enter().append("text")
.attr("class", "label")
.attr("fill", "black")
.text(function(d) { return d.name; });
force.on("tick", function() {
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("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
texts.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
});
});
关于javascript - D3 力导向图节点上的标签/文本，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13364566/