[Inkscape-user] Writing an extension

I think I may have found the idea to resolve the issue I myself submitted: http://sourceforge.net/tracker/index.php?func=detail&aid=1261413&gro...

I would like to try and write an extension in perl. I have never writen any plugin, but it looks possible for me to complete.

After a quick look at perl dropshadow plugin and SpSVG.pm, the only problem I seem to have is how I should ask inkscape to pass the coordinates of selected nodes. It will have to be passed to my script together with object id. Can anybody help?

Karol