Layout may be applied at each refresh using the class RTLayoutAnimation. This is useful when elements have varying size.

-=-=-=-=-=-=-=-=-=-=-=-= | v es resizeAnimation shape normalizer | v := RTView new. normalizer := RTMultiLinearColor new. shape := RTBox new size: ‪#‎yourself‬; color: [ :value | (normalizer level: (value / 100)) alpha: 0.4 ]. es := shape elementsOn: (1 to: 100 by: 10). v addAll: es. v canvas addMenu: 'Press me!' callback: [ es do: [ :e | resizeAnimation := RTResizeMove new toExtent: (100 - e model) @ (100 - e model) on: e. e model: (100 - e model). v addAnimation: resizeAnimation ] ]. v addAnimation: (RTLayoutAnimation new elements: es; yourself). v open -=-=-=-=-=-=-=-=-=-=-=-=

Animation on: https://www.facebook.com/photo.php?v=636496456436955&set=vb.340543479365...

Alexandre