wiki:Meetings/Meet-2011-08-31
Last modified 7 months ago

KIELER Meeting 08/31/2011

  • Moderator: jes
  • Protocol: cmot
  • Attendees
    • ima
    • swe
    • rvh
    • jes
    • pkl
    • cmot
    • ckru
  • Start: 10:00h
  • End: 10:30h

Agenda

  • News on KWEBS (swe)
  • Layout of Compound Graphs (ima)

News on KWEBS

  • Integration into Layout Framework (Dortmund) is ongoing
    • Integration is already tested
    • Demonstration of some screen shots
    • Labels and splines are not done yet
      • Nodes and edges are integrated
    • Only 1/2 a day of work for integration
    • Neato-Layouter is used for data flow diagrams

  • Discussion
    • Performance is critical, measurement framework exists and should be used for evaluation (rvh)
    • Sometimes exceptions occur
    • 'Layout done in xx ms' should be displayed or this information should be made available also on the client side where the layout could be delayed by the network (rvh)
    • Annotate the main node with time measurement information may be one option, another is a separate time request after layout is done
    • KWEBS infrastructure is light weight
    • Examples should be gathered to experiment and to tune the layout in Kiel (rvh)

Layout of Compound Graphs

  • Approaches: Sander vs Sugiama
  • Key ideas: Flat layout vs nested layout
  • Structure should be kept, do not change changes
  • => Sander (unless performance is not as good)
  • Use dummy nodes to represent compound nodes
  • Demo of Layout view
    • Linear segment node placement
    • Klay layered debug viewer
    • Level crossing links
    • Crossing two hierarchy levels? (rvh)
      • Seems to be a problem when there are mixed transitions (1 and 2 layer crossing ones) (default2) (Ticket #1746)
    • Other open topics:
      • Missing constraint for cycles
      • Enhancement of transition crossings (makes phase changes necessary)