Can you provide a link to what you want with "drag and drop"? I did a search for "eclipse drag and drop" and found a document that talks about an
SWT version of the AWT version of drag and drop discussed in the previous link... all data transfer related stuff...
Components *are* data - moving them between applications *is* data transfer. If you want to move components within the same application, then you don't need to do the "data transfer" stuff - you just need to change coordinates of the components based on mouse events.