Predicate function CHILDCOUNT() always returns 0

[markhm]

As described here:
https://sourceforge.net/p/prefuse/discussion/343012/thread/11121b8a/

Problem still exists, confirmed today.

[markhm]

It seems there is a bit more nuance to this.

The CHILDCOUNT() and TREEDEPTH() functions work when used a in regular Predicate (e.g. to color nodes, see below), but nót to add an extra data column, e.g. like this:

tree.addColumn("label_child_count", "CONCAT(name,' (',CHILDCOUNT(),')')");.

Working example: https://i.imgur.com/8savFgU.png

[alex-rind]

That's indeed quite nuanced.

The tree functions work with addColumn on a VisualTree:

VisualTupleSet vt = m_vis.add(tree, t);
vt.addColumn("label_child_count", "CONCAT([name],' (',TREEDEPTH(),')')");

Alternatively, it would be necessary to change some code in prefuse's Graph class (cp. commit 889ad9e).