Hi everyone! I'm building a ui with Spec and using Roassal view inside of my window. To embed the view I use Roassal2Spec package (RoassalModel class). When I click on element of view I want to change its color. The problem is that color changes only after you move a winodw or open another window etc. Here is an example code. Just try to click on elements and than move the window. ********************************************** ui := DynamicComposableModel new. ui instantiateModels: #( button ButtonModel view RoassalModel ). ui button label: 'I am a button'. ui extent: 600 @ 480. ui view script: [ :view :canvas | |es| es := RTEllipse new size: 20; elementsOn: (1 to: 6). view addAll: es. RTCircleLayout on: es. RTEdgeBuilder new view: view; elements: es; connectToAll: [ :value | { value + 1. (value + 1) % 6 } ]. view elements when: TRMouseClick do: [ :e | e element trachelShape color: Color red. World displayWorld. World doOneCycleNow ]. canvas camera focusOnCenter. ]. layout := SpecLayout composed newColumn: [ :col | col add: #button height: ComposableModel toolbarHeight; add: #view. ]; yourself. ui openWithSpecLayout: layout. ********************************************** Thanks Mark -- View this message in context: http://forum.world.st/Spec-with-Roassal-tp4838854.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.