After digging around a large number of drag/drop related methods I have 
a) a rather better understanding of how it works
b) a small list of rather odd methods that seem in need of a moments consideration and probably improving.

I’ll Mantisificate the full list, but the basic story is that there seems to be some confusion about the meaning and use of #isPartsBin[:] & #isPartsDonor[:], a rather confused PasteUpMorph>repelsMorph:event: (and #wantsDroppedMorph:event:), and the usual confused and/or outdated comments that mislead the reader. 

A swiki tutorial should appear fairly soon, including a Plumbin’ example.

See http://bugs.squeak.org/view.php?id=7807

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Strange OpCodes: QVC: Question Valid Command