DragAndDrop in Cassandra. How?

[jodoming]

Hi,

at the Cassandra Demo I can see, that it is possible to Drag and Drop the Parts from one Stack to another. At the vaaclipse master source code I found several sources concerning this issue (/org.semanticsoft.vaaclipse.vaadin.addon.dndlayout, /org.semanticsoft.vaaclipse.vaadinaddons/fi.jasoft.dragdroplayouts*) but I can´t identify how it is used at the cassandra demo. I tried to make my own demo, following the Mediaplayer tutorial, but that tutorial understandably only describes the basic features, so my try works but without such nice features as drag an drop.
Could anybody give me a little support?
Thanks in advance!

[klevis]

Hi,
i am not sure but every part created must support drag and drop(dnd will be active).
At GenericRender every element created is set to :setDragHandler(VaadinDropHandler-->getting from context)
@semanticsoft can you please help for this?