[umbrello] [Bug 414595] New: Improve auto layout for associations

[Ralf Habacker]

https://bugs.kde.org/show_bug.cgi?id=414595

            Bug ID: 414595
           Summary: Improve auto layout for associations
           Product: umbrello
           Version: 2.29.3 (KDE Applications 19.08.3)
          Platform: Other
                OS: All
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: umbrello-devel at kde.org
          Reporter: ralf.habacker at freenet.de
  Target Milestone: ---

Created attachment 124150
  --> https://bugs.kde.org/attachment.cgi?id=124150&action=edit
screenshot

Auto-Layout uses the command line tool 'dot' to create a non-overlapping layout
according to predefined rules. From this layout, the layout generator fetches
node positions to place widgets and edge endpoints to place associations. 

The point output format such as plain-ext[1] or xdot[2] also provides
additional edge positions in the base spline format, which are currently not
evaluated, but would be helpful to improve the visual display.

STEPS TO REPRODUCE
1. start umbrello
2. open appended xmi file 
3. open state diagram
4. apply vertical layout

OBSERVED RESULT
Comparing the visual with the generated dot file shows differences

EXPECTED RESULT
The visual should be similar to the generated dot file

SOFTWARE/OS VERSIONS
irrelevant

ADDITIONAL INFORMATION
[1] https://www.graphviz.org/doc/info/output.html#d:plain-ext
[2] https://www.graphviz.org/doc/info/output.html#d:xdot

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