Hi guys we got rid of preferences as a ugly facade and now we have UITheme and UIManager. I would like to understand how we can skin widgets while be as loosely coupled as possible. May be a UI builder is missing…. I was looking at SystemProgressMorph we setDefaultParameters self theme setSystemProgressMorphDefaultParameters: self updateColor "update the apareance of aMorph" self theme preferGradientFill ifFalse: [^ self]. self fillStyle: (self theme progressFillStyleFor: self) and SystemProgressBarMorph has initialize "Initialize the receiver from the current theme." super initialize. barSize := 0. self fillStyle: ( self theme progressBarFillStyleFor: self); borderStyle: (self theme progressBarBorderStyleFor: self); barFillStyle: ( self theme progressBarProgressFillStyleFor: self) extent: aPoint "Update the bar fillStyle if appropriate." super extent: aPoint. self fillStyle isOrientedFill ifTrue: [ self fillStyle: (self theme progressBarFillStyleFor: self)]. self barFillStyle isOrientedFill ifTrue: [ self barFillStyle: ( self theme progressBarProgressFillStyleFor: self)] So to help me understanding the problem, I thought about the flow of things. I would really to avoid to have - widgets construction code in UITheme and UImanager (ref to debugger UI as mentioned by henryk) - UITheme invocation inside the widgets. May be a widget should have its own state and when we build it the class creation only push the info from the UITheme to the widgets What do you think? Stef