[英]D3 Force Directed JSON Adjacency List
I have a Graph Adjacency List, like so: 我有一个图邻接列表,如下所示:
{
nodes: [
{
"id": 1,
"label": "Mark
},...],
edges: [
{
"source": 1,
"target": 2
},....]
}
The edges use the id from the node! 边缘使用节点的ID!
I've been using PHP to echo this list onto client side. 我一直在使用PHP将此列表回显到客户端。
D3 cannot load my JSON from file. D3无法从文件加载我的JSON。 So I try to parse it manually: 所以我尝试手动解析它:
var width = window.innerWidth,
height = window.innerHeight;
var color = d3.scale.category20();
var force = d3.layout.force()
.linkDistance(40)
.linkStrength(2)
.charge(-120)
.size([width, height]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var nodes = [], links = [];
d3.json( null, function( error )
{
JSONData.nodes.forEach( function(node)
{
nodes.push( node );
});
JSONData.edges.forEach( function(edge)
{
links.push({source: edge.source, target: edge.target});
});
force.nodes(nodes)
.links(links)
.start();
var link = svg.selectAll(".link")
.data(links)
.enter().append("path")
.attr("fill", "none")
.attr("class", "link");
var node = svg.selectAll(".node")
.data(nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", "#4682B4" )
.call(force.drag);
node.append("title").text(function(d) { return d.label; });
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; });
});
});
However, all I can see is the nodes, but not the edges. 但是,我只能看到节点,而不是边缘。 I have added a CSS file with: 我添加了一个CSS文件:
.node {
stroke: #4682B4;
stroke-width: 1.5px;
}
.link {
stroke: #ddd;
stroke-width: 1.5px;
}
But to no avail. 但无济于事。 Is there some way around this? 有办法解决吗?
You need to use: 您需要使用:
.enter().append("line")
instead of 代替
.enter().append("path")
(maybe also you need to change some other attributes so that they correspond to a line , not a path ). (也许您还需要更改一些其他属性,以便它们对应于line而不是path )。
Alternatively, you can draw some more complex paths instead of straight lines, but I think it would be an overkill in your case. 另外,您可以绘制一些更复杂的路径而不是直线,但是我认为这对您来说是一个过大的选择。
EDIT: 编辑:
I just found two related and interesting questions: 我刚刚发现了两个相关且有趣的问题:
enter link description here - describes another kind of problems while displaying links in a force layout - make sure you don't hit a similar obstacle 在此处输入链接说明 -在以强制布局显示链接时描述另一种问题-确保不会碰到类似的障碍
enter link description here - a guy trying to draw curvbes instead of lines, if you decide to do something similar 在此处输入链接说明 -如果您决定做类似的事情,那么他会尝试绘制曲线而不是线条
But hope that this answer and hints in the comments are sufficient for you to get what you want. 但希望此答案和注释中的提示足以使您获得想要的东西。
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