With FoamTree 3.2.0 and later you can defer loading of the data for lower levels of the hierarchy until the data
is really needed, that is when the user opens the parent group. Click-and-hold or double-click a group with the
» suffix to load its child groups.
In a real world, you would probably load data from a remote server using Ajax, but for the sake of this demo we
simply generate new data and simulate the loading delay using
For very deeply-nested hierarchies, FoamTree will hit the limit of double floating point precision and will not
be able to generate child groups. In such scenarios, the group will be annotated with the
»» suffix. The only way to let the user browse the contents of such a group is to
reload FoamTree with the relevant sub-hierarchy.
groupLabelDecorator to append
»» decorations based on the current state
of the visualization.
A simple utility for displaying spinner animations inside those polygons for which the data
is currently loading. The utility uses the
to draw the animation.