Mapping between two list grids

[a.reiter]

Hello every body,

i'm not a professional in UI development...
anyway, i would like to create a kind of a custom component for smart gwt.
consider two list grids and a mapping between them
it should be possible to create a connection by drag and drop
the attached image shows the wanted component, so it's clear what i mean



is there a way to some how create such a component?
thanks for any help

cheers
andre

[a.reiter]

no one has an idea, how to go about it?