如何从JSON扩展子,在单击父- D3后加载数据。强制布局。

[英]How to expand child from JSON, load data after click parent - D3.Js - force directed layout


I want to use this example http://bl.ocks.org/mbostock/1093130

我想使用这个示例http://bl.ocks.org/mbostock/1093130

Link is Collapsible Force Layout and load all nodes from JSON in first loading.

Link是可折叠的强制布局,在第一次加载时从JSON加载所有节点。

Question:

问题:

I want to load child after click parent's node and expand after click.

我想在单击父节点后加载子节点,单击后展开。

When collapse each node, destroy all nodes are as child.

当折叠每个节点时,销毁所有节点作为子节点。

How to implement idea?

如何实现主意吗?

Note: my graph is huge and web browser doesn't respond to load. Now I want to load/destroy data gradually.

注意:我的图表很大,web浏览器不响应加载。现在我想逐渐加载/销毁数据。

1 个解决方案

#1


1  

You have to do it like this:

你必须这样做:

On click of the node fetch the children associated with the node:

单击节点获取与节点关联的子节点:

function getMyData(d) {
  //return the url for the parent node.
  if (d.name == 'graph') {
    return "https://gist.githubusercontent.com/cyrilcherian/231657f6c86d540adf64/raw/375f89aaa65d16bbbda904c7f17a132face1a7d6/graph_children.json";
  } else if (d.name == 'cluster') {
    return "https://gist.githubusercontent.com/cyrilcherian/dbf9f0b2180201e4cdbe/raw/a7e6361349fe06b6c16f7f376d07dae36da89848/cluster_children.json";
  }  else if (d.name == 'analytics') {
    return "https://gist.githubusercontent.com/cyrilcherian/0efc76bd75386bf89961/raw/5d32ea77f1d34e8ca40f749ce9d501669e8563a4/analytic_children.json";
  } else if (d.name == 'flare') {
    return "https://gist.githubusercontent.com/cyrilcherian/b9bcb0fdc398bd691641/raw/11a79edf99511cf040ffcb98ae9c30895798ae5e/flare.json";
  } else
    return [];
}

// Toggle children on click.
function click(d) {

  if (d3.event.defaultPrevented) return; // ignore drag
  if (d.children) {
    d.children = null;
    update();
  } else {
    //do your ajax call to get the chldren

    var url = getMyData(d);
    d3.json(url, function(error, json) {
      d.children = json;
      update();//update on ajax success.
    })

  }

}

Here these are my ajax calls to load its children based on the parent node "https://gist.githubusercontent.com/cyrilcherian/b9bcb0fdc398bd691641/raw/11a79edf99511cf040ffcb98ae9c30895798ae5e/flare.json"

这里是我基于父节点“https://gist. githuercontent.com/cyrilcherian/b9bcb0fdc398bcbd691641/raw/11a79edf99511cf9fcb98ae9c30895798808ae5e/flare.json”加载子节点的ajax调用。

Working code here

工作代码在这里

You need to click the flare/cluster/graph/analytics node to load its children via ajax.

您需要单击flare/cluster/graph/analytics节点以通过ajax加载其子节点。

Hope this helps!

希望这可以帮助!

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