selector tool for deforming geometry?

Dear all,

I am trying to create a definition/tool that will allow me to select a single geometry from a sequence of geometries. After which I want that tool to give me the possibility to transform/scale that specific geometry. But the tricky part is that I want that piece of geometry to stay deformed after I move the tool to a new piece of geometry.

So basically I want a movable cage edit..

Additionally I would like it when I transform a geometry with this "cage" that other surrounding geometries get deformed when their edges/surfaces meet.

Hope I explained it good enough and that someone is able to help me out..

Many thanks,

Kobaski.