On 31/12/18 1:54 AM, Steve Quezadas wrote:
I am experimenting with pharo right now, particularly with Morphs. The weird thing is that some morphs can have a rotation halo and others do not.
This has a "rotate halo": bar := EllipseMorph new. bar openInWorld.
This does not: foo := Morph new. foo openInWorld
A morph has to implement #prepareToRotate method for rotate Halo button to appear and also implement rotationDegrees: method to do the actual transformation. Otherwise, you can add a flex shell to the morph and request it to rotate it. Morph does not support rotation, so there is no rotation button in its halo. EllipseMorph has a dummy rotationDegrees: method. CircleMorph and PolygonMorph go the whole way. foo := Morph new addFlexShell openCenteredInWorld foo topRendererOrSelf rotationDegrees: 45 bar := (PolygonMorph vertices: {261@400. 388@519. 302@595} color: Color blue borderWidth: 2 borderColor: Color black) openInWorld. bar rotationDegrees: 45 HTH .. Subbu