Help needed finding tools or terminology

Third try due to login and post problems ...
I'm looking for some tools to help me with some graphical layout needs,
Part of my problem is that all the keywords an phrases I can think of to fo a Google or forum search bring up too much that I don't want.
Any pointers to tools or terminology would be appreciated.
I have a couple of graphical layout needs.
One application needs to place 'widgets' of a few predefined types on a canvass, connect them with lines, set properties, and display them in different colors/apperance based upon their status. I'm sure everyone has encountered many applications which do this kind of thing. I even coded a couple in SWING myself. This time I hope someone has a toolkit which does all the basics and I can concentrate on my application needs.
A similar need is a layout manage which allows selection of 'widgets' of various types and placement on a tree or directed, acyclic graph according to a limited set of rules (e.g., you can add a leaf or a branch to a branch, but you cannot add a branch to a leaf).
A third variation allows construction of 'composit widgets' from a selection of basic widgets according to a set of rules (e.g., you can make a car using one engine, one body and 4 wheels).
Any ideas of tools that may help me?
Any suggestions of how/where to search to find any such tools?
Thanks,
-- Frank

third time and no answer? he you will not get any answer. This looks like a general problem.
but some terminology for you:
- graphs
- graph-algorithms
- wrong forum
- branches are leafs as long as they have no childs
This is not a problem really belonging to swing. What you need is algorithms. So post in the algorithm forum.
May it helps: MVC. You need the C and the M, swing will only be the V.
There are a lot of tools out in the net for deploying graphs, with definable nodes, nodeproperties, different graphtypes. Just look out for them (graph, graph-layout,etc.)
regards

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