Yes it does. You've just forgot to signal a refresh (view raw signalUpdate).

Try this: -=-=-=-=-=-=-=-=-= view := ROMondrianViewBuilder new. view shape rectangle size: 20. view interaction on: ROMouseEnter do: [ :event | view shape line color: Color blue. view edgesFrom: [ :i | i \\ 2 ]. view raw signalUpdate ]. view nodes: (1 to: 20). view shape line. view treeLayout. view open -=-=-=-=-=-=-=-=-= Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. _______________________________________________ Moose-dev mailing list Moose-dev(a)iam.unibe.ch https://www.iam.unibe.ch/mailman/listinfo/moose-dev