noumena

Controllers are a straightforward way to customize the JavaScript infovis toolkit (JIT) visualizations.
A controller is a JavaScript object that “implements” an interface. The interface methods will then be called at different stages of the visualization, allowing you to, for example, place labels and add event handlers to them, performing actions before and after the […]

The tree structure that feeds the spacetree, hypertree, treemap and rgraph visualizations is always the same.
Roughly speaking, the JSON tree structure consists of tree nodes, each having as properties:

id a unique identifier for the node.
name a node’s name.
data The data property contains a dataset. That is, an array of key-value objects defined by the user. […]