Posted by MartinW on Apr 03, 2014; 8:55pm
URL: https://forum.world.st/Drag-and-drop-items-between-list-views-tp4752285p4752625.html

Goubier Thierry wrote

Another approach, that I would use, is to put more complex objects
inside the lists. Thoses objects would know how to get added / removed
from their respective collections, and then I would propagate collection
changes to the ListModel instances.

That sounded promising. I made a Collectible class. It's instances know how to add themselves to a collection (i'm not sure if that's a good idea, but as experiment..)

The problem is, i never get to these objects in my acceptDropBlock. In
 
list1 acceptDropBlock: [ :transfer :event :source :receiver :index |
   transfer passenger do: [:element | element addSelfToCollection: collection1] ].

the element is only a ByteString - the name of my Collectible object. :(

Are there other possibilities if i do not use Spec?