Graphical layout of multi-port channels

[ajmooij]

Multi-port channels (i.e., channels that connect more than two ports) are graphically represented by a small black square node, and edges between the black square and each of the connected ports.

The default graphical layout is remarkable in multiple aspects:

• Location of the black square
  • Sometimes around the middle of the connected ports (this seems to be the most logical)
  • Sometimes in the top-left corner
• Edge routing
  • Usually unnecessarily complex

This applies to multiple scenarios that seem to behave differently:

• Initializing a graphical view based on a textual model;
  system ports instances I1 : C I2 : C I3 : C channels { I1.P, I2.P, I3.P }
cluster class C ports P instances channels
• Creating a multi-port channel using the graphical editor;
• Creating a multi-port channel in the textual editor when a graphical view has already been created (so by adding/removing the fragment {I1.P, I2.P, I3.P}).

[wpiers]

6623bed adresses the "Usually unnecessarily complex" part of the issue, which was occuring when creating a multi-port channel.

The location of black squares should still be improved, as as previously stated they sometimes are in the top left corner. Also, ELK layout might be improved regarding those.