creating new draggers, some help needed

[Fotios Hadginikos <F.Hadginikos@xxxxxxxxxxxxxx>]

Hi, I am trying to create a new Inventor Dragger but I have problemsbuilding 
the class.

I would like to have something like the SoTranslate1Dragger but the user
should only pick on the arrow heads (not the arrow body) and while
dragging, instead of changing the draggers position in 3D space I would
like it to remain at the same position but stretch instead.

For example:
 
<----->

then the user clicks the right arrow head and drags to the right: 

<------------------->

Any ideas?  

Any help would be appreciated, 
thanks,

Fotis