A collection of packages by [John Ellson], providing abstract [graph] representation and layouting functions for [Tcl] programs.

It consist of two packages:

   '''tclgdr''':   A [graph] datastructure which provides callbacks for node insertion or modification and import functionality for the graphviz [http://www.graphviz.org] DOT graph description language.

   '''tclgdl''':   A dynamic layouter that can be bound to a graph datastructure via callbacks/events. It provides raw graph layouting facilities and can be bound via callbacks/events to a graph display, for example the Tk canvas.

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[schlenk]: It should be possible to use tclgdl to easily layout a [graph] created with ::[struct]::[graph]. One would have to implement some callbacks, so tclgdl gets notified about insertions and modifications on the graph, and one had to provide a basic rendering infrastructure to show the graph on a [canvas]. 

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[Category Package]